JP5326105B2 - Optical sensor device and sugar content meter using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sugar content meter capable of highly accurately measuring the sugar content of an agricultural product such as a fruit without damaging since the fine light axis adjustment between a light emitting element and a light receiving element is not required, and the mass-productivity can be improved and the use efficiency of a light beam can be increased. <P>SOLUTION: The sugar content meter includes the light emitting element 12 for emitting a light beam with a predetermined wavelength, a substrate 10 on the surface of which the light emitting element 12 is formed, an objective lens 5 for converging and transmitting the light beam emitted from the light emitting element 12, an optical unit 7 containing the light receiving element 13 formed on the surface of the substrate 10 surrounding the light emitting element 12, and for generating a received light signal by receiving the incident light beam which is transmitted and converged through the objective lens 5, and a control unit 31 irradiating a target site of the agricultural product with the light beam emitted from the light emitting element 12, detecting the sugar concentration in the target site based on the received light signal generated by making the light receiving element 13 receive the light beam reflected from the component in the target site, and displaying the detected sugar concentration on a display unit 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a saccharimeter using a solar cell, a tool for harvesting crops, and an audio recording device using the solar cell.

Several proposals have been made for measuring the sugar content of agricultural products such as fruits.
For example, in an agricultural product identification method and apparatus according to a proposal, the digital saccharimeter 4 is a measuring instrument for measuring a Brix value indicating the saccharidity, and includes a liquid crystal display unit 43 that displays the measured value, and a power source for the digital saccharimeter 4. The digital saccharimeter 4 includes a power switch for switching ON / OFF, an operation unit 42 for performing measurement start instructions and settings, and a circular measurement lens unit 41 for injecting and measuring a liquid subject. The measurement result is output to the control device 3. (Refer to Patent Document 1, paragraph number “0029”, FIG. 4)
However, in the case of the proposed agricultural product identification method and apparatus described above, a hole is made in the agricultural product and fruit juice and the like are extracted therefrom, so that the agricultural product is damaged. Therefore, proposals have been made to measure sugar content without damaging crops. For example, the sugar content is measured by irradiating light to agricultural products such as fruits. Therefore, the following patent documents 2 to 5 are proposed.

Many proposals have been made regarding voice recording technology. Especially when the audio signal to be recorded such as human voice or music is interrupted while recording the audio signal input from the microphone, the recording is interrupted and the audio signal to be recorded is input again. VOR (voice activated recording) for resuming recording is known.
For example, in an automatic recording circuit according to a proposal, it is described that when a level detecting means determines that the input analog signal exceeds a predetermined level, the recording mechanism is started to start up. (See Patent Document 1, paragraph number “0007”)
In addition, in a voice-activated recording device based on a proposal, a comparison unit that compares a set threshold value with a voice level of a voice that is input thereafter, and a start or standby of recording are determined based on an output from the comparison unit. It is described that it comprises a determination means. (See Patent Document 2, paragraph number “0007”)
In a proposed recording / reproducing apparatus, when the jog dial is clicked while the VOR is displayed on the liquid crystal panel, the CPU shifts to the VOR setting mode, and only when a sound of a certain level or more is detected. A configuration is described in which recording is performed automatically, and recording is not performed when there is no sound (see Patent Document 3, paragraph number “0058”).
Further, it is described that a sound recording apparatus according to a proposal starts recording on a recording medium when the input sound level is equal to or higher than a threshold value. (See Patent Document 4, paragraph number “0033”)
In addition, in a data recording apparatus according to a proposal, it is described that the syscon 24 compares the level of the audio signal with the determination level L1, and starts synchronized recording when the audio signal exceeds the determination level L1. (See Patent Document 5, paragraph number “0031”)
In addition, in a proposed data distribution apparatus, shooting by the selected camera and recording by the microphone are started assuming that a memorial event is started when the audio input level to the microphone exceeds a predetermined threshold. Is described. (See Patent Document 6, paragraph number “0067”)
Further, it is described that in a sound recording apparatus according to a proposal, if the sound input level EL is equal to or higher than the sound activation level TH, a recording operation process is executed and the input sound is recorded on the recording medium 7. . (See Patent Document 7, paragraph number “0046”)
In an information processing apparatus according to a proposal, the recording control unit 52 monitors the volume of the DSD data captured by the DSD device 2 based on the PCM data supplied from the LPF 57, and the volume is predetermined. It is described that recording is started when it is determined that the threshold value is exceeded. (See Patent Document 8, paragraph number “0081”)
JP 2007-225293 A Japanese Patent Laid-Open No. 11-044638 JP 2003-114191 A JP 2004-294108 A JP 2008-039428 A JP 07-19297 A Japanese Patent Laid-Open No. 09-0500364 Japanese Patent Laid-Open No. 11-065600 JP 2001-236095 A JP 2002-133773 A JP 2002-158990 A JP 2003-297061 A JP 2006-079740 A

However, Patent Documents 2 to 5 have a problem in that mass production efficiency deteriorates because fine optical axis adjustment between the light emitting element and the light receiving element is necessary. Furthermore, when the optical axis of a light emitting element and a light receiving element has shifted | deviated by secular change etc., there exists a subject that the sugar content of agricultural products, such as a fruit, cannot be measured with high precision.
The present invention has been made to solve such a conventional problem, and in the case of measuring the sugar content by irradiating light to agricultural products such as fruits, fine optical axis adjustment between the light emitting element and the light receiving element. It is an object of the present invention to provide a saccharimeter that can improve the mass productivity and increase the utilization efficiency of a light beam without the need for a light source.
It is another object of the present invention to provide a harvesting tool that can determine whether or not to harvest before harvesting a crop by providing the sugar content meter of the present invention.
In Patent Documents 6 to 13, since the recording is started when the level of voice or the like of a person input from the outside is equal to or higher than a predetermined level, for example, a plurality of people can hold a meeting or a meeting. There is a problem that while speaking, the voice of a person who speaks loudly can be recorded, but the voice of a person speaking loudly cannot be recorded. In addition, when the surrounding noise level is higher than a predetermined level, there is a problem that the noise is recorded.
The present invention has been made to solve such a conventional problem, regardless of the level of the level of human voice or the like input from the outside, and even when the level of unnecessary ambient noise is large. An object of the present invention is to provide a voice recording apparatus that can reliably record the voice of a person to be recorded.

The sugar content meter of the present invention is a portable sugar content meter for measuring the sugar content of agricultural products,
An operation unit, a display unit, a light emitting element that emits a light beam of a predetermined wavelength according to a driving signal, a substrate on which the light emitting element is formed, a light beam emitted from the light emitting element is converged and transmitted And a light-receiving element that surrounds the light-emitting element on the surface of the substrate and receives the light beam of the predetermined wavelength that is transmitted through the lens, converged, and incident to generate a light-receiving signal. An optical unit having a drive signal to the optical unit to irradiate the target part of the crop with the light beam emitted from the light emitting element, and the light beam reflected by the component in the target part And a control unit that detects the concentration of sugar in the target site based on the light reception signal generated by receiving the light, and displays the detected concentration of sugar on the display unit. And wherein the door.
The sugar content meter of the present invention is characterized by comprising, for example, a mounting means for mounting on a crop harvesting tool.
The sugar content meter according to the present invention includes, for example, a solar cell that supplies power to an electronic circuit including a control unit.
The sugar content meter according to the present invention includes, for example, a communication unit that performs wireless communication with an external information processing apparatus.

  The crop harvesting tool of the present invention is characterized in that the sugar meter of the present invention is fixedly or detachably attached by its mounting means.

The voice recording device of the present invention is a portable voice recording device,
And a plurality of voice input means provided at different positions on the main body, each voice input means generating a voice signal in response to a voice from a specific direction different from the other voice input means. A sound source that is more distant from each sound input means has a directivity such that the other sound input means is sensitive to sound from the sound source, and a plurality of sound signals input from a plurality of sound input means Conversion means for converting into digital audio data of a system, first storage means, second storage means, and storage control means for storing a plurality of systems of digital audio data converted by the conversion means in the first storage means A storage determination unit that determines whether or not the digital audio data stored in the first storage unit is to be stored in the second storage unit based on a difference in volume between the digital audio data of each system. When it is determined that the storage by the determining means has a configuration which includes a transfer control means for transferring the digital audio data stored in the first storage device to the second storage means.

The voice recording apparatus according to the present invention is characterized in that it is a wristwatch type having a belt having both ends coupled to two opposing portions of the main body.
In the audio recording apparatus of the present invention, the storage determination unit removes data components common to the digital audio data of a plurality of systems stored in the first storage unit from the digital audio data of each system, and then stores at least one system. When the volume value of the digital audio data exceeds a predetermined threshold value, it is determined that digital audio data having a volume value exceeding the threshold value is stored in the second storage unit.
In the voice recording apparatus of the present invention, an electronic device including power control means, power control means, a plurality of voice input means, conversion means, first and second storage means, storage control means, storage determination means, and transfer control means A charging battery for supplying power to the circuit and a solar battery are provided, and the power control means controls the power supplied to the electronic circuit to be supplied from either the charging battery or the solar battery.
In the audio recording device of the present invention, the main body includes a rechargeable battery, an input / output interface for connecting to an external device, and a connection terminal, and is connected to the connection terminal via an earphone device connected to the connection terminal or a predetermined cable. The digital audio data stored in the second storage means is transmitted to the information processing apparatus, and the charging battery is charged with the charging current from the information processing apparatus.

  According to the saccharimeter of the present invention, it is not necessary to finely adjust the optical axis between the light emitting element and the light receiving element, and as a result, the productivity can be improved and the utilization efficiency of the light beam can be increased. The effect is obtained that the sugar content can be measured with high accuracy without being damaged.

  In addition, according to the crop harvesting tool of the present invention, the sugar content of the crop such as fruits is measured with high accuracy by a sugar meter attached to the tool, so that the right or wrong of the harvest can be determined before the crop is harvested. The effect that it can be determined is obtained.

  According to the voice recording apparatus of the present invention, the voice of the person to be recorded can be recorded regardless of the level of the voice of the person inputted from the outside, even if the surrounding unnecessary noise level is high. The effect of being able to record reliably is obtained.

  Hereinafter, an embodiment of a sugar content meter according to the present invention and an embodiment of an invention of a crop harvesting tool will be described with reference to FIGS. 1 to 6.

  FIG. 1 is a diagram showing an appearance of a saccharimeter 1 in an embodiment of the present invention. 1A is a top view of the saccharimeter 1, FIG. 1B is a left side view of the saccharimeter 1, FIG. 1C is a side view of the front and back of the saccharimeter 1, and FIG. 1 is a bottom view of a saccharimeter 1. FIG. As described above, the sugar content meter 1 is a substantially rectangular parallelepiped having the first surface to the sixth surface. On the upper surface shown in FIG. 1A, a switch 2, four LEDs (light emitting diodes), a display portion 3 including other display elements, and a solar cell 4 are provided. An objective lens 5 is provided on the side surface shown in FIG. Two mounting means 6 (an elastic member with a magnet or an adhesive) are provided on the bottom surface shown in FIG. The four LEDs (a), (b), (c), and (d) of the display unit 3 emit light of “red”, “yellow”, “green”, and “blue”, respectively.

  FIG. 2 is a view showing the structure of the optical unit provided in the saccharimeter 1 of FIG. FIG. 2A is a cross-sectional view of the optical unit 7. In FIG. 2A, the inner wall of the cylindrical member 8 that accommodates the objective lens 5 is a mirror surface. An optical filter 9 for cutting visible light is provided behind the objective lens 5. A resin or ceramic substrate 10 is provided behind the cylindrical member 8. On the upper surface of the substrate 10, a micro lens 11 at the center, a light emitting element 12 below the micro lens 11, a light receiving element 13 around the light emitting element 12, and a signal line (not shown) for connecting to an electronic circuit. It consists of FIG. 2B is a diagram of the disc-shaped substrate 10 as viewed from the objective lens 5 side. The light receiving element 13 is a donut shape surrounding the light emitting element 12 concentrically, and has a considerably larger area than the light emitting element 12. As shown in FIG. 2, the light emitting element 12, the micro lens 11, the objective lens 5, and the light receiving element 13 have the same optical axis.

  The light emitting element 12 emits a near-infrared light beam Le. The microlens 11 converges and emits the light beam Le emitted from the light emitting element 12 forward. The objective lens 5 is converged by the microlens 11, further converges the light beam Le transmitted through the optical filter 9, and is emitted to the outside of the saccharimeter 1. Therefore, the light beam Le emitted from the light emitting element 12 is converged by the microlens 11 and the objective lens 5, and is irradiated as a light beam onto a crop such as fruit (not shown). The light emitting element 12 may be an element that emits laser light instead of near infrared rays.

  The light beam Le irradiated to the crop is partially reflected on the surface, partially transmitted and emitted to the outside, partially absorbed by sugar, and the remaining part of the light beam not transmitted and absorbed. Le diffuses internally. Then, the reflected light beam Lr, which is a further part of the irregularly reflected light beam, is reflected toward the objective lens 5 of the saccharimeter 1. The reflected light beam Lr transmitted through the objective lens 5 and the optical filter 9 is reflected directly or by the mirror surface of the inner wall of the cylindrical member 8 and enters the light receiving element 13.

  In the case of using grapes as an example of a crop, if the ratio of the amount of reflected light beam Lr incident on the light receiving element 13 is R (= Lr / Le), the irradiation condition of the light beam Le is statistically the same. If so, R is expressed as a function of sugar content. Since the light receiving element 13 generates an electrical signal corresponding to the amount of the incident reflected light beam Lr, that is, the sugar content detection signal DS, the fruit juice of the persimmon is extracted and the actual sugar content SC is experimentally detected by a conventional method. For example, a statistical correspondence table between DS and SC (hereinafter referred to as “DS / SC table”) can be created. Therefore, by storing a DS / SC table experimentally created for each type of crop in advance in the memory of the saccharimeter 1, the sugar level can be measured before each type of crop is harvested. The measurement results are as follows: emission colors “red (at harvest)”, “yellow (close to harvest)”, “green (slightly far from harvest)”, “blue” (It ’s quite far until harvest) ”.

  Therefore, by using the portable saccharimeter 1 of FIG. 1 at the crop cultivation place, the sugar content can be measured before the crop is harvested. In this case, since the light emitting element 12, the microlens 11, the objective lens 5, and the light receiving element 13 have the same optical axis, there is no need for delicate optical axis adjustment between the light emitting element and the light receiving element. In addition, the light beam utilization efficiency can be increased and the sugar content of agricultural products such as fruits can be measured with high accuracy.

  FIG. 3 is an external view of a crop harvesting tool including the sugar content meter 1 of FIG. As shown in FIG. 3, this tool is a scissors 15, and has a structure for harvesting crops with a blade 16. The saccharimeter 1 is fixedly attached to the scissors 15 by an elastic member as the mounting means 6 or is detachably attached by a magnet. When the user measures the sugar content of the crop, put the thumb into one hole 17a of the operation portion (handle) 17 of the scissors 15 and put the middle finger, ring finger, little finger into the other hole 17b, and the blade 16 of the scissors 15 Point to the crop and press switch 2 with your index finger. The measurement result is displayed by the emission color of the display unit 3. The user determines whether or not to harvest based on the displayed result. For example, even if the light emission color of the display unit 3 is “yellow” or “green” and it is not fully matured, it may be harvested according to the shipping time. In short, it is an object of the present invention to more accurately measure the level of sugar content. Details of the measurement operation will be described later.

  FIG. 4 is a diagram illustrating a configuration of an electronic circuit housed in the sugar content meter 1 according to the embodiment. 4A, the switch 2 and the display unit 3 shown in FIG. 1 are connected to the control unit 31, and the sugar content detection signal from the infrared driving unit 32 that drives the light emitting element 12 and the light receiving element 13 is received. An amplification conversion unit 33 that performs amplification and conversion from analog to digital, a clock unit 34 that also functions as a timer unit, and a wireless communication unit 35 that communicates with the outside using a Bluetooth (registered trademark) wireless signal are connected. The solar cell 4 supplies power to these electronic circuits.

  FIG. 4B shows an internal configuration of the control unit 31, which includes a CPU 111, a flash memory 112, and a work memory 113. The CPU 111 executes a program stored in the flash memory 112 to temporarily store data related to sugar content measurement processing in the work memory 113 and refer to the DS / SC table stored in the flash memory 112. While the measurement result is displayed on the display unit 3, the entire sugar content meter 1 is controlled.

  FIG. 5 shows a wireless signal of Bluetooth (registered trademark) between the sugar meter 1 (including the scissors 15 for harvesting the crop with the sugar meter 1 fixedly attached, a saw and other tools; the same applies hereinafter) and the personal computer 21. It is the schematic which shows a mode that BT is transmitted / received. The sugar content meter 1 transmits the measured sugar content of the crop and the date and time of measurement, and also receives DS / SC table change information stored in the flash memory 112. The personal computer 21 has various information related to harvesting obtained via the Internet 22, such as market price and order information, weather conditions, DS / SC table change information from a farm laboratory, etc. Receive.

  Next, operation | movement of the sugar content meter 1 in embodiment is demonstrated. FIG. 6 is a flowchart showing the operation of the saccharimeter 1 executed by the CPU 111 of FIG. It is determined whether or not the switch 2 is turned on (step S1). When the switch 2 is turned on, a measurement control signal is given to the infrared drive unit 32 to emit near infrared rays from the light emitting element 12. (Step S2). The emitted near-infrared light beam passes through the microlens 11, the optical filter 9, and the objective lens 5 to irradiate agricultural products such as straw.

  When the near-infrared light beam reflected from the crop and incident from the objective lens 5 is received by the light receiving element 13, the sugar content detection signal DS that is photoelectrically converted by the light receiving element 13 and converted into a digital signal by the amplification conversion unit 33 is obtained. A detection process for capturing is performed (step S3). Next, a calculation process is performed for calculating the sugar content SC of the detected sugar content detection signal DS using the DS / SC table of the flash memory 112 (step S4).

  Next, based on the calculated sugar content SC data, a display process for causing any LED of the display unit 3 to emit light is performed (step S5), and a timer is started (step S6). It is determined whether or not the timer value has passed a predetermined time (for example, 5 seconds) (step S7). When the predetermined time has passed, the LED is turned off and the display is erased (step S8). Then, the calculated sugar content SC data and the measured date (hereinafter referred to as “sugar content / date data”) are stored in the flash memory 112 (step S9). Thereafter, the process proceeds to step S1 to determine whether or not the switch 2 is turned on.

  If the switch 2 is not on in step S1, it is determined whether or not there is a call from the personal computer 21 by a radio signal (step S10). When there is a call, a communication process for establishing a communication path with the personal computer 21 in response to the call and transmitting / receiving commands and data is performed (step S11).

  In the communication process, it is determined whether or not a data request command has been received from the personal computer 21 (step S12). When there is a data request, the sugar content / date / time data stored in the flash memory 112 is transmitted (step S12). S13). After the transmission, the sugar content / date data is deleted from the flash memory 112 (step S14).

  After deleting the sugar content / date and time data in step S14, or when there is no data request from the personal computer 21 in step S12, it is determined whether or not DS / SC table change data has been received from the personal computer 21 (step S15). . When the DS / SC table change data is received, the DS / SC table data in the flash memory 112 is changed (step S16).

  During communication processing, it is determined whether or not a communication path disconnection command has been received from the personal computer 21 (step S17). If no disconnection command is received, the loop processing from step S12 to step S17 is continued. When a disconnection command is received, a communication path disconnection process is performed (step S18), and the process proceeds to step S1 to determine whether the switch 2 is turned on.

  As described above, according to the above-described embodiment, the saccharimeter 1 of the present invention includes the switch 2, the display unit 3, the light emitting element 12 that emits a light beam having a predetermined wavelength according to the drive signal, and the light emitting element 12. Is formed on the surface of the substrate 10, the objective lens 5 that converges and transmits the light beam emitted from the light emitting element 12, and is formed to surround the light emitting element 12 on the surface of the substrate 10, and passes through the objective lens 5. An optical unit 7 having a light receiving element 13 that receives a light beam of a predetermined wavelength that is converged and incident and generates a light reception signal, and a light beam emitted from the light emitting element 12 by supplying a drive signal to the optical unit 7 Irradiating the target part of the crop, and detecting the concentration of sugar in the target part based on the light reception signal generated by receiving the light beam reflected by the component in the target part by the light receiving element 13, And a control unit 31 for displaying the concentration of out the sugar on the display unit 3, a. Therefore, when irradiating light to crops such as fruits and measuring the sugar content, there is no need for fine adjustment of the optical axis between the light emitting element and the light receiving element, improving the mass productivity and increasing the utilization efficiency of the light beam. it can.

  In addition, according to the above embodiment, the crop harvesting tool of the present invention is fixedly attached to the sugar meter 1 of the present invention by attachment or detachably attached by a magnet before harvesting the crop. You can judge whether or not to harvest.

  In each of the above embodiments, the present invention has been described by taking the near infrared as an example of the light beam applied to the crop, but a laser beam may be used instead of the near infrared.

  Further, the sugar content meter 1 may be provided with a plurality of optical units so that the crops are irradiated with light beams of near infrared rays or laser beams having a plurality of different wavelengths. In this case, the agricultural products are sequentially irradiated with light beams having different wavelengths with a time difference.

Next, an embodiment of a voice recording apparatus according to the present invention will be described with reference to the drawings.
FIG. 7 is a perspective view showing an appearance of the wristwatch-type voice recording apparatus 1 according to the embodiment of the present invention. In FIG. 7, a display unit 3 and three switches 4 (4 a, 4 b, 4 c) composed of an LCD (Liquid Crystal Display Device) or other display device are provided on the upper surface of the main body 2. The main body 2 is attached to a user's wrist (not shown) by a belt 5 and a stop member 6 (locking means). A solar cell 5a is provided on the surface of the belt 5 to supply power to an internal electronic circuit to be described later. In addition, two microphones 7a and 7b (speech input means) are provided at the 12 o'clock position and 6 o'clock position inside the main body 2 near the surface.

  FIG. 8 is a diagram showing the structure of the main body 2 of the wristwatch-type voice recording apparatus 1 of FIG. FIG. 8A is a diagram of the surface of the main body 2, and shows the positional relationship between the display unit 3, the switches 4a, 4b and 4c, and the microphones 7a and 7b. Although details will be described later, a mark of ▲ is appropriately displayed on the screen of the display unit 3 at positions corresponding to the switches 4a, 4b, and 4c. FIG. 8B is a left side view of FIG. 2A, and a multifunctional connection terminal 8 for connecting to an external device (an information processing device such as an earphone device or a personal computer or other devices) is provided. ing. Although not shown in the drawing, the connection terminal 8 is provided with a cover of a resin material that can be opened and closed.

  FIG. 9 is a diagram showing the directivity of sensitivity of the microphones 7a and 7b of the voice recording apparatus 1. As shown in FIG. 9 (A) when the main body 2 of the voice recording device 1 is viewed from above and FIG. 9 (B) when viewed from the side, the microphones 7a and 7b are respectively conical or elliptical shapes indicated by dotted lines extending obliquely upward. It has directivity that is sensitive to sound within a cone-shaped range. As shown in FIG. 9B, the directivity of sensitivity of the microphones 7a and 7b is designed such that the ranges of the elliptical cone shapes overlap as the distance from the voice recording device 1 increases. Therefore, for a sound source close to the voice recording device 1, the sensitivity difference between the microphone 7a and the microphone 7b increases with respect to the sound generated therefrom, and for a sound source far from the voice recording device 1, The sensitivity difference between the microphone 7a and the microphone 7b becomes small with respect to the sound generated therefrom. For example, the conversation of a person away from the voice recording device 1, or the indoor environmental sound including high frequency components such as a ringing sound of a telephone, a keystroke sound of a keyboard, and various other electronic sounds, or an outdoor car The sensitivity difference between the microphone 7a and the microphone 7b with respect to outdoor environmental sounds, such as horns and loudspeaker loudspeaker speakers, is extremely small.

  FIG. 10 illustrates the directivity in FIG. 9 more specifically. The directivity in FIG. 9 is responsive to the position of the microphone 7a and the microphone 7b of the voice recording apparatus 1 and the respective voices according to the height from the voice recording apparatus 1. It is a figure which shows a range typically. That is, it is a diagram in which the range of directivity of the microphone 7a and the microphone 7b is cut at different heights. When the height (distance) h1 is close to the voice recording device 1, the range a1 in which the microphone 7a is sensitive to voice and the range b1 in which the microphone 7b is sensitive to voice do not overlap, but from the voice recording device 1. As the heights of h2 and h3 gradually increase, the overlapping portions of the ranges a2 and a3 in which the microphone 7a is sensitive to sound and the ranges b2 and b3 in which the microphone 7b is sensitive to sound are gradually increased. In the case of the height h4 away from the voice recording device 1, the range a4 in which the microphone 7a is sensitive to voice and the range b4 in which the microphone 7b is sensitive to voice almost overlap each other. In this way, each microphone is sensitive to the sound from a specific direction different from the other microphones, and the other microphone is more sensitive to the sound from the sound source as the sound source is further away from each microphone. It has a configuration with directivity.

  The configurations of the microphones 7a and 7b shown in FIGS. 7 to 10 are merely examples. As a modification, a switch 4b at the 3 o'clock position is provided at the 10 o'clock position on the opposite side of the switch 4a, and two microphones (temporarily referred to as “microphones 7c and 7d”) are placed at the 3 o'clock position and the 9 o'clock position. Add to position. In this case, it has directivity that is sensitive to sound in a conical or elliptical cone shape that spreads from the positions of the microphones 7a, 7b, 7c, and 7d. Further, as the distance from the voice recording device 1 increases, the respective conical or elliptical cone ranges overlap. Therefore, as in the case of FIGS. 3 and 4, each microphone is sensitive to sound from a specific direction different from the other microphones, and the other microphone is the more the sound source farther away from each microphone. It has directivity that is sensitive to the sound from the sound source.

  FIG. 11 is a diagram illustrating a configuration of an electronic circuit housed in the main body 2 of the voice recording device 1 according to the embodiment. In FIG. 11A, the control unit 31 (storage control unit, storage determination unit, transfer control unit, power control unit) is connected to the display unit 3 and the switch 4 shown in FIG. 7 and includes a timer. Microphone interfaces (I / F) 33 and 34 (conversion means) including a clock unit 32, an amplifier circuit and an A / D conversion circuit (not shown), a nonvolatile memory 35 such as a flash memory, a D / A conversion circuit, An input / output interface (I / O I / F) 37 that includes a filter circuit and a power amplifier circuit (not shown) and relays between the connection terminal 8 and the control unit 31 shown in FIG. .

  A secondary battery 38 that is a rechargeable battery is connected to the input / output interface 37. The secondary battery 38 can be charged by the personal computer when the voice recording device 1 is attached to the personal computer by the connection terminal 8 and a predetermined cable such as a USB cable. The power switch (ASW) 39 is connected to the secondary battery 38 and the solar battery 5 a of the belt 5, and receives power supply from the secondary battery 38 or the solar battery 5 a of the belt 5 according to a control signal from the control unit 31. Thus, the voltage Vd is supplied to the electronic circuit.

  The control unit 31 supplies the voltage Vd to the electronic circuit by the power from the solar battery 5a of the belt 5 in the case of a clock display with low power consumption, and the secondary battery in the case of recording or playback with high power consumption. A switching control signal is supplied to the power supply switch 39 so that the voltage Vd is supplied to the electronic circuit by the electric power from the power supply.

  In addition to the solar cell 5 a of the belt 5, a solar cell may be further provided on the lower side of the display unit 3 of the main body 2. For example, when the display unit 3 is a blue light emitting diode or other blue light emitting element, the material of the solar cell is a material that has less influence even when reflecting sunlight having a blue wavelength, that is, a wavelength that is less than that of blue. Desirable is cadmium telluride (CdTe), amorphous silicon (a-Si), microcrystalline silicon (μc-Si), polycrystalline silicon (m-Si), etc., which is sensitive to long sunlight.

  A microphone interface (I / F) 33 is connected to the microphone 7 a, amplifies an analog audio signal input from the microphone 7 a, converts it into digital audio data, and inputs the digital audio data to the control unit 31. Similarly, a microphone interface (I / F) 34 is connected to the microphone 7b, amplifies an analog audio signal input from the microphone 7b, converts it into digital audio data, and inputs the digital audio data to the control unit 31. Note that the amplifier circuit of the microphone interface 34 is a variable amplifier circuit whose gain can be adjusted by the control unit 31. The reason for adjusting the amplification factor will be described later.

  FIG. 12 is a diagram illustrating an internal configuration of the control unit 31 and the memory 35. 12A, a CPU 111, a ROM 112, a RAM 113, and a DAU (Digital Amplifying Unit) 114 are included. The CPU 111 executes a program stored in the ROM 112 in response to the operation of the switch 4, temporarily stores data to be processed in the RAM 113, which is a work area, and displays an image associated with the execution of the program on the display unit 3. To display. The DAU 114 is a digital amplification circuit that amplifies digital audio data supplied from the input / output interface 37 to an external earphone device or a personal computer. Note that these units constituting the inside of the control unit 31 can also be realized by a one-chip LSI (Large Scale Integrated Circuit).

  12B, the memory 35 includes storage areas 35a, 35b, and 35d (first storage means) and a storage area 35e (second storage means). Data is written and read by the control unit 31. It is managed. The first storage means may be constituted by the RAM 113 instead of the storage areas 35a, 35b, and 35d. This is because, as will be described later, the first storage means temporarily stores data.

  Next, based on the flowchart of the CPU 111 showing the operation of the control unit 31 shown in FIGS. 13 to 15, the screen of the display unit 3 shown in FIG. 16, and the waveform diagram of the digital audio data shown in FIG. The recording operation will be described.

  FIG. 13 is a main flowchart of the CPU 111. After a predetermined initialization (step SA1), a clock is displayed (step SA2). In the clock display, the CPU 111 displays a screen shown in FIG. That is, the current time and date are displayed, and the characters “MODE” and ▲ that indicate mode change are displayed at the position of the screen corresponding to the switch 4a in FIG. Then, it is determined whether or not the switch 4a corresponding to “MODE” is turned on (step SA3).

  When the switch 4a is turned on, the CPU 111 displays a mode selection screen shown in FIG. In the mode selection screen, menu icons for the recorder mode, timer setting mode, personal computer (PC) communication mode, and recording mask mode are displayed, and the screen corresponding to each of the three switches 4a, 4b, and 4c in FIG. A character “MODE” meaning icon selection, a character “RETURN” meaning returning to the clock display, and a character “ENTER” meaning determining the mode of the menu icon that has been selected being inverted are displayed together with a ▲ mark. indicate.

  For example, the CPU 111 determines whether or not the switch 4c corresponding to “ENTER” is turned on in the screen of FIG. 16B in which “recorder mode” is selected (step SA4), and “recorder mode” is determined. If so, the gain of the amplifier circuit of the microphone interface 34 shown in FIG. 12A is adjusted so as to coincide with the gain of the amplifier circuit of the microphone interface 33 (step SA5). The amplifier circuit of the microphone interface 34 is designed to have the same amplification factor as the amplifier circuit of the microphone interface 33, but in reality, a slight difference occurs due to manufacturing variations, aging, or temperature characteristics. Sometimes. Therefore, the amplification factor of the amplifier circuit of the microphone interface 34 is adjusted so that the levels of the two audio signals input in accordance with the ambient environmental noise input from the two microphones 7a and 7b are the same.

  In this case, as shown in FIG. 10, when the sound source of the surrounding environmental noise has a height (distance) of h4 from the voice recording device 1, ranges a4 and b4 to which the microphone 7a and the microphone 7b are sensitive. And do not overlap completely. However, by the adjustment process in step SA5, a slight shift in spatial directivity is electrically corrected to match the apparent directivity that is sensitive to the sound source of the environmental noise. Next, it is determined whether or not the switch 4b is turned on (step SA6). When this switch is selected, a recording process is executed (step SA7).

  FIG. 14 is a flowchart of the recording process in FIG. In some cases, the user wants to record without the other party's knowledge. In this case, the user selects the “recording mask mode” in advance on the screen of FIG. For this reason, when a transition is made to the recording process, it is determined in FIG. 14 whether or not the recording is mask recording (step SB1). If the recording is normal recording instead of mask recording, a recorder mode screen as shown in FIG. 16C is displayed (step SB2).

  In the recorder mode screen of FIG. 16 (C), a character “in recording”, the current date and time, and a ▲ mark at the position of the screen corresponding to each of the three switches 4a, 4b and 4c in FIG. “MODE” meaning mode change, “REC” meaning recording, and “PB” meaning reproduction are displayed.

  On the other hand, in the case of mask recording, the clock display screen shown in FIG. 16A is displayed instead of the screen shown in FIG. 16C (step SB3). However, in order to indicate that only the user is recording, for example, only the ▲ mark may be displayed at a position corresponding to the switches 4b and 4c.

  Next, in the default or timer setting mode, the timer t that counts up to a preset predetermined time T (default is 5 seconds) is reset to “0” (step SB4). Next, the digital audio data acquired from the microphone 7a is stored in the storage area 35a of the memory 35, and the digital audio data acquired from the microphone 7b is stored in the storage area 35b of the memory 35 (step SB5).

  For example, it is assumed that when a user has a business meeting with one or several other parties, the conversation of the meeting is recorded. In such a situation, as long as the user maintains a normal posture, the directivity of the sensitivity of the microphone 7a is in the direction of the other party, and the directivity of the sensitivity of the microphone 7b is in the direction of the user. Therefore, not only the user's voice but also the voice uttered by the other party can be reliably recorded whether it is a loud voice or a small voice.

  FIG. 17 is a waveform diagram showing digital audio data processed by the control unit 31 and signal processing. FIG. 17A is a waveform diagram showing digital audio data stored in the storage area 35a and digital audio data stored in the storage area 35b at the same time. In FIG. 17A, in the recording target section (voice) which is the recording target voice section, the voice waveform a obtained from the microphone 7a has a larger amplitude than the voice waveform b obtained from the microphone 7b. This state means that the sound source is the other party's voice positioned within the directivity range of the sensitivity of the microphone 7a. On the other hand, when the sound source is user's voice positioned within the sensitivity directivity range of the microphone 7b, the voice waveform b has a larger amplitude than the voice waveform a. However, in the sections other than the recording target section, the amplitudes of the sound waveform of the environmental sound obtained from the microphone 7a and the sound waveform (n1, n2, n3, n4, etc.) of the environmental sound obtained from the microphone 7b are substantially the same. is there. This is a natural result because the amplification factors of the amplifier circuits of the microphone interfaces 33 and 34 are adjusted to be the same in step SA5 in FIG.

  In FIG. 17A, for example, a voice waveform n1 including a high-frequency component is an indoor environmental sound such as a telephone ringing tone, a keyboard key hitting sound, and other various electronic sounds, and is included in the voice waveform of the recording target section. The voice waveform n2 having a similar frequency characteristic is an environmental sound of a conversation of a person away from the voice recording device 1, and the voice waveform n3 having a very large impulse characteristic is an environmental sound of an outdoor car horn. The voice waveform n4 having a large amplitude is the environmental sound of the loud speaker of the outdoor advertising car. Since these environmental sounds are sound sources at a position far from the sound recording device 1, that is, sound sources at positions where the directivity ranges of sensitivity of the microphones 7a and 7b overlap, the sound waveform obtained from the microphone 7a and the microphone 7b The difference in amplitude, the difference in frequency characteristics and the difference in phase from the speech waveform obtained from the above are extremely small, and are close to zero as far as practical signal processing is concerned.

  In step SB5, after the two systems of digital audio data are stored in the storage area 35b and the storage area 35b, respectively, a recording data selection process is executed (step SB6). FIG. 15 is a flowchart of the recording data selection process in FIG. First, the digital audio data stored in the storage area 35b is subtracted from the digital audio data stored in the storage area 35a (step SC1). As described above, the microphone 7a and the microphone 7b have sensitivity directivity in different directions, but the sensitivity difference is small for a distant sound source.

  Accordingly, when the digital audio data obtained from the microphone 7b is subtracted from the digital audio data obtained from the microphone 7a in step SC1 in FIG. 15, the audio waveform of the digital audio data of the difference signal shown in FIG. It is done. That is, the sound waveform of the environmental sound obtained from the microphone 7a is canceled by the sound waveform of the environmental sound obtained from the microphone 7b having substantially the same amplitude, frequency characteristics, and phase. Therefore, even when the level of unnecessary ambient noise is equal to or higher than a predetermined level, noise recording can be prevented by canceling the ambient noise.

  The amplitude value (effective value) of the difference signal D obtained by the subtraction process in step SC1 in FIG. 15 is larger than zero in the example of FIG. 17, but the voice waveform a obtained from the microphone 7a is obtained from the microphone 7b. In some cases, the amplitude may be smaller than the voice waveform b. That is, when a user's voice positioned within the sensitivity directivity range of the microphone 7b is input, the voice waveform b obtained from the microphone 7b has a larger amplitude than the voice waveform a obtained from the microphone 7a. . In this case, the amplitude value of the difference signal D obtained by the subtraction process in step SC1 in FIG. 15 is smaller than zero in the case of the example in FIG. In order to detect the amplitude difference between the amplitude value of the speech waveform a and the amplitude value of the speech waveform b, the amplitude value of the difference signal D is compared with a threshold value TH (the level of the two-dot chain line in FIG. 17) slightly larger than zero. .

  It is determined whether or not the amplitude value of D is greater than TH (step SC2). If the amplitude value of D is greater than TH, the difference signal D, that is, the audio waveform (ab) as the difference signal is recorded. Are selected as digital audio data (step SC3). On the other hand, when the amplitude value of D is not greater than TH, the amplitude of the audio signal a is smaller than or equal to the amplitude of the audio signal b. It is determined whether or not it is larger (step SC4). That is, it is determined whether or not the amplitude of the speech waveform (b−a), which is a difference signal obtained by subtracting the speech waveform a from the microphone 7a from the amplitude of the speech waveform b from the microphone 7b, is greater than TH. When the amplitude value of -D is larger than TH, the inverted difference signal -D, that is, the audio waveform (ba) as the difference signal is selected as digital audio data to be recorded (step SC5).

  After selecting the audio waveform (ab) or the audio waveform (ba) as the digital audio data to be recorded, the selected digital audio data is stored in the storage area 35d of the memory 35 (step SC6).

  Next, the level of the digital audio data stored in the storage area 35d is adjusted (step SC6). As shown in FIG. 17B, the amplitude of the voice waveform a from the microphone 7a in the recording target section is subtracted by the voice waveform b from the microphone 7b, and the voice waveform (ab) that is the difference signal is subtracted. The amplitude is reduced. Although not shown in the figure, similarly, the amplitude of the speech waveform (b−a), which is a difference signal obtained by subtracting the speech waveform a from the speech waveform b, is also reduced. Therefore, the DAU 114 (digital amplification circuit) shown in FIG. 12B converts the amplitude of the speech waveform (ab) or speech waveform (ba) into the original speech waveform a or speech waveform before subtraction processing. Amplify to match the amplitude of b. That is, the amplitude of the sound waveform to be recorded that has been attenuated as a result of the signal processing calculation to remove the environmental sound that is a noise component is restored to the state at the time of reception.

  Next, it is determined whether or not the flag RECF for determining whether or not the digital audio data stored in the storage area 35d is stored in the storage area 35e is "0" (step SC7). The initial value of RECF is “0”. If RECF is “0”, RECF is set to “1 (store)” (step SC8). Thereafter, the process returns to the flowchart of FIG.

  In Step SC4, when the amplitude value of -D obtained by inverting the difference signal D is not greater than TH, that is, when the amplitudes of the speech waveform (ab) and speech waveform (ba) as the difference signal are less than TH. That is, when it is very close to zero, the voice waveform from the microphone 7a and the voice waveform from the microphone 7b are substantially equal, there is no recording target section as shown in FIG. 17, and only the voice waveform of the environmental sound is present. Is obtained. Therefore, RECF is not set to “1”, and the state of “0” is maintained. Thereafter, the process returns to the flowchart of FIG.

  In FIG. 14, after the recording data selection in step SB5, it is determined whether or not the value of the timer t has reached a predetermined time T (for example, 5 seconds) set in advance (step SB7). If the value of the timer t has not reached the predetermined time T, the process proceeds to step SB5, where the digital audio data acquired from the microphones 7a and 7b is stored in the storage area 35a and the storage area 35b, and the recording in step SB6 is performed. Continue the data selection process.

  When the value of the timer t reaches the predetermined time T in step SB7, it is determined whether or not the flag RECF is “1 (save)” (step SB8). If RECF is “1”, the digital audio data stored in the storage area 35d is compressed (step SB9), and the compressed data is stored in the storage area 35e (step SB10). Next, RECF is reset to “0” (step SB11), and the data in the storage areas 35a, 35b, and 35d is erased (step SB12).

  On the other hand, if RECF is “0” in step SB8, that is, if there is no recording target section in the section of the predetermined time T, the data in the storage areas 35a, 35b, and 35d is erased in step SB12. After erasing data in step SB12, the process returns to the main flowchart of FIG.

  In FIG. 13, it is determined whether or not the switch 4b is turned on during the recording process of step SA7 (step SA8). If this switch is not turned on, the recording process of step SA7 is continued, but this switch is turned on. If so, the recording process is stopped (step SA9). That is, the switch 4b is a toggle switch that instructs the recording unit 31 to perform the recording process when the step SA6 is turned on (step SA6; YES), and instructs the control unit 31 to stop the recording when the step S8 is turned on (step SA8; YES). Configure.

  If the switch 4b is not turned on in step SA6, it is determined whether or not the switch 4c is turned on (step SA10). When this switch is turned on, a reproduction process is executed (step SA11). In the reproduction process, the user needs to insert an earphone (not shown) into the audio output terminal 8 shown in FIG. 8B before turning on the switch 4c. FIG. 16D is a diagram showing a screen during the reproduction process.

  It is determined whether or not the switch 4c is turned on during the playback process in step SA11 (step SA12). If this switch is not turned on, the playback process is continued. If this switch is turned on, the playback process is continued. Is stopped (step SA13). That is, the switch 4c is a toggle switch that instructs the control unit 31 to perform the regeneration process when the step SA10 is turned on (step SA10; YES), and instructs the control unit 31 to stop the regeneration when the step SA12 is turned on (step SA12; YES). Configure.

  After the recording process is stopped in step SA9, the reproduction process is stopped in step SA13, or in step SA6, the switch 4b is not turned on (step SA6; NO), and the switch 4c is not turned on in step SA10 (step SA6). In the case of step SA10; NO), it is determined whether or not the switches 4a and 4c are simultaneously turned on (step SA14). When these switches are turned on simultaneously, the data in the memory 35 is erased (step SA15). In this case, as shown in FIG. 16E, a message for confirming to the user whether or not to erase the data in the memory 35 is displayed.

  After erasing the data in the memory 35 in step SA15, or if the switches 4a and 4c are not turned on at the same time in step SA14, it is determined whether or not the switch 4a is turned on alone (step SA16). When this switch is not turned on (step SA16; NO), the process proceeds to step SA6, and one of the processing paths to the above-described step SA16 is executed.

  In step SA16, when the switch 4a is turned on (step SA16; YES), the recorder mode is changed to the clock display mode, and the process proceeds to step SA2 to display the clock.

  If the recorder mode is not selected in step SA4 (step SA4; NO), other mode processing, that is, “timer setting mode”, “personal computer communication mode” or “mask recording mode” shown in FIG. ”Is executed (step SA17), and when the mode processing is completed, the mode is changed to the clock display mode, and the process goes to step SA2 to display the clock.

  As described above, in the mask recording mode in which recording is performed without being known to the other party, the display content of the display unit 3 is slightly different from the normal recording mode (only the mark of ▲ is different). Description is omitted.

  FIG. 16F is a diagram illustrating a screen in the timer setting mode. The control unit 31 stores the two systems of digital audio data obtained from the microphones 7a and 7b in a section of a predetermined time T in the storage area 35b and the storage area 35b, respectively, and determines whether there is a recording target section in the section. The predetermined time T can be changed from the default 5 seconds to any one of 10 seconds, 15 seconds, and 20 seconds.

  As a modification of the embodiment, instead of determining whether or not there is a recording target section after the elapse of a predetermined time T, a configuration for determining when the data stored in the storage areas 35a and 35b of the memory 35 has reached the storage capacity It may be.

  As a modification of the embodiment, it is also possible to set a recording start time in advance, and automatically start recording without reaching a user operation when that time is reached. Such automatic recording is particularly effective when recording is kept secret.

  As described above, according to the above-described embodiment or modification, the audio recording device 1 of the present invention is a wristwatch type having the main body 2 and the belt 5 having both ends coupled to the two portions of the main body 2. The voice recording device 1 includes two microphones 7a and 7b that are provided at different positions (positions at 12 o'clock and 6 o'clock) of the main body 2 and generate audio signals according to sounds from outside, and microphones 7a and 7b. Microphone interfaces 33 and 34 for converting input audio signals into two systems of digital audio data, storage areas 35a, 35b and 35d as first storage means, and a storage area 35e as second storage means The digital audio data of two systems converted by the non-volatile memory 35 such as a flash memory and the microphone interfaces 33 and 34 are stored in the storage areas 35a and 35b, and the digital audio data and the storage area 35b stored in the storage area 35a are stored. The digital audio data that is different from the digital audio data stored in the memory area 35d is stored in the storage area 35d. A controller that determines whether or not to save the digital audio data stored in the storage area 35d based on the sound volume, and transfers the digital audio data stored in the storage area 35d to the storage area 35e when it is determined to store the digital audio data. 31.

  Therefore, according to the voice recording apparatus 1 of the present invention, regardless of the level of a person's voice or the like input from the outside, and even when the level of unnecessary ambient noise is high, Sound can be recorded reliably.

  In the above embodiment, the present invention has been described with respect to the voice recording apparatus 1 including the two microphones 7a and 7b. However, the number of microphones included in the voice recording apparatus is not limited to two. For example, as a modification of the embodiment, four microphones 7a, 7b, 7c, and 7d may be provided at the 12 o'clock, 6 o'clock, 3 o'clock, and 9 o'clock positions of the wristwatch type voice recording apparatus.

  FIG. 18 is a waveform diagram showing digital audio data and signal processing processed by the control unit in this modification. FIG. 18A is a waveform diagram showing digital audio data of the four microphones 7 a to 7 d stored in the memory 35 at the same time. In FIG. 18A, in the recording target section (voice) that is the recording target voice section, the voice waveform a obtained from the microphone 7a has a larger amplitude than the voice waveform b obtained from the microphone 7b, and the microphone 7c and The amplitude is larger than the speech waveform c and the speech waveform d obtained from 7d. However, in the sections other than the recording target section, the amplitudes of the sound waveforms (n1, n2, n3, n4, etc.) of the environmental sounds obtained from the four microphones 7a to 7d are substantially the same.

  FIGS. 18B, 18C, and 18D show a speech waveform (ab), a speech waveform (ac) obtained by subtracting speech waveform b, speech waveform c, and speech waveform d from speech waveform a, respectively. It is a speech waveform (ad). In this case, when the volume value of the sound waveform of at least one digital sound data exceeds the threshold value TH, the digital sound data having a volume value exceeding the threshold value is stored. However, when the digital audio data having a volume value exceeding the threshold is a plurality of systems (three systems in FIGS. 18 (B), (C), and (D) in the modified example), the volume value is the largest among them. Digital audio data (digital audio data of the audio waveform a from the microphone 7a in FIG. 18) is stored.

  In the above-described embodiment and modification, the present invention has been described by taking as an example a wristwatch type having a belt 5 having both ends coupled to two portions of the main body 2, but the present invention is a wristwatch type voice recording apparatus. It is not limited to. For example, the present invention can be applied to all portable audio recording devices that can be stored in a user's pocket or bag.

It is a perspective view which shows the external appearance of the sugar content meter in embodiment of this invention. It is a figure which shows the structure of the optical unit provided in the inside of the sugar content meter of FIG. FIG. 2 is an external view of a crop harvesting tool including the sugar content meter of FIG. 1. It is a figure which shows the structure of the electronic circuit accommodated in the sugar content meter of FIG. It is the schematic which transmits / receives a radio signal between the sugar content meter of FIG. 1, and a personal computer. It is a flowchart performed by CPU of the control part of FIG. It is a perspective view which shows the external appearance of the audio | voice recording apparatus in embodiment of this invention. It is a figure which shows the structure of the main body of the wristwatch-type audio | voice recording apparatus of FIG. It is a figure which shows the directivity of the sensitivity of two microphones of an audio recording device. It is a figure which shows typically the range which responds to each sound according to the position of the two microphones 7 of a voice recording device, and the height from a voice recording device. It is a figure which shows the structure of the electronic circuit accommodated in the audio | voice recording apparatus of FIG. It is a figure which shows the internal structure of the control part and memory of FIG. It is a main flowchart of CPU of FIG. It is a flowchart of the recording process in FIG. It is a flowchart of the sound recording data selection process in FIG. It is a figure which shows the screen of the display part of the audio | voice recording apparatus of FIG. It is a wave form diagram which shows the digital audio | voice data of embodiment. It is a wave form diagram which shows the digital audio data of the modification of embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sugar meter 2 Switch 3 Display part 4 Solar cell 5 Objective lens 6 Mounting means 7 Optical unit 10 Board | substrate 11 Microlens 12 Light emitting element 13 Light receiving element 15 Scissors 31 Control part 32 Infrared drive part 33 Amplification conversion part 34 Clock part 35 Wireless communication Part 111 CPU
DESCRIPTION OF SYMBOLS 112 Flash memory 1 Voice recording device 2 Main body 3 Display part 4 Switch 5 Belt 5a Solar cell 7a, 7b Microphone 8 Connection terminal 31 Control part 32 Clock part 33, 34 Microphone interface 35 Memory 35a, 35b, 35c, 35d Storage area 37 In Output interface 38 Secondary battery 39 Power switch

Claims (3)

An optical sensor device for detecting the sugar content of an object containing sugar,
A light-emitting element that is formed on the surface of the substrate and emits a light beam having a wavelength that is absorbed by the sugar content according to a drive signal ;
A lens that converges and transmits the light beam emitted from the light emitting element;
On the surface of the substrate, the light having the wavelength that is incident on the substrate by surrounding the light-emitting element by an inner edge close to the outer edge of the light-emitting element and passing through the lens in a region defined by the inner edge and the outer outer edge. A light receiving element that receives the beam and generates a light reception signal;
A housing member that houses the substrate and the lens and has a mirror surface that reflects light on an inner wall surface between the substrate and the lens;
An optical sensor device. A sugar content meter that measures the sugar content of crops,
A main body for accommodating the optical sensor device according to claim 1;
An operation unit provided in the main body;
A display unit provided in the main body;
In response to an operation of the operation unit, a drive signal is given to the optical sensor device, a light beam of the wavelength is emitted from the light emitting element, and the sugar content of the crop is based on the received light signal received by the light receiving element. A control unit for detecting the concentration of and displaying on the display unit;
  A sugar content meter characterized by comprising: The sugar content meter according to claim 2, wherein the sugar content meter is detachably attached to a crop harvesting tool.