CN213072611U - Infrared sensor module - Google Patents
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- CN213072611U CN213072611U CN202021775230.2U CN202021775230U CN213072611U CN 213072611 U CN213072611 U CN 213072611U CN 202021775230 U CN202021775230 U CN 202021775230U CN 213072611 U CN213072611 U CN 213072611U
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Abstract
The utility model discloses an infrared sensor module, which comprises at least two infrared sensors and a controller; each infrared sensor of the at least two infrared sensors comprises an infrared transmitting unit and an infrared receiving unit; an infrared emission unit for emitting infrared light to a detection object; an infrared receiving unit for receiving infrared light reflected from a detection object and converting the infrared light into an electric signal; and the controller is connected with the at least two infrared sensors and is used for realizing the infrared proximity detection function according to the electric signals output by each infrared sensor and realizing the gesture recognition function according to the electric signals output by the at least two infrared sensors. The utility model discloses both can realize gesture recognition, can realize again that infrared is close the infrared sensor module who detects, can be applied to multiple electrical equipment's non-contact control.
Description
Technical Field
The utility model relates to a sensor technology field especially relates to an infrared sensor module.
Background
The infrared proximity sensor is used for replacing the traditional mechanical key in many occasions due to the characteristics of safety and sanitation of the infrared proximity sensor along with the development of an infrared technology, the principle of the infrared proximity sensor is that the infrared proximity sensor detects and judges the distance between an object such as a finger and the infrared proximity sensor, and the key is considered to be triggered when the distance is smaller than a certain range. The infrared proximity sensor has a short detection distance, generally within 30mm,
fig. 1 is a schematic view of an arrangement of an infrared transmitting unit and an infrared receiving unit included in an infrared proximity sensor. The infrared proximity sensor 1 generally includes an infrared emitting unit 11 and an infrared receiving unit 12, the infrared emitting unit 11 including an infrared light emitting diode (IRED) for emitting infrared light, and the infrared receiving unit 12 including a Photodiode (PD) or a Phototransistor (PT) or a Photoresistor (PTR) for detecting the amount of reflected light. The infrared ray emitted from the infrared emission unit 11 is reflected by the finger 13 and then incident on the infrared reception unit 12 to generate a current signal. The magnitude of the current signal generated by the infrared light receiving unit 12 is proportional to the amount of the received infrared light reflected by the finger 13, and the amount of the received infrared light reflected by the finger 13 is approximately inversely proportional to the distance of the finger 13 from the infrared proximity sensor 1, so the magnitude of the current generated by the infrared light receiving unit 12 is approximately inversely proportional to the distance of the finger 13 from the infrared proximity sensor 1. According to the application, a proper working distance is set, and the voltage reference Vc at the working distance is determined. When the distance between the object and the infrared proximity sensor is smaller than the working distance, namely the voltage Va generated by the infrared receiving unit 12 is larger than or equal to Vc, the infrared proximity sensor detects a proximity signal, which is equivalent to pressing down a key; when the object is more than the working distance from the infrared proximity sensor, that is, the voltage Va < Vc generated by the infrared receiving unit 12, the infrared proximity sensor does not detect the proximity signal, which is equivalent to that the key is not triggered.
On the other hand, the infrared gesture is also increasingly used for controlling the electrical device, such as "from left to right", "from right to left", "from top to bottom", "from bottom to top" and the like gestures to control the start and stop of the device, adjust parameters, and the like. The working range of the infrared gesture is large, and is generally 0-300 mm.
Fig. 2 is a schematic arrangement diagram of an infrared transmitting unit and an infrared receiving unit included in an infrared gesture sensor. The infrared gesture sensor 2 generally includes a first infrared emitting unit 21, a second infrared emitting unit 22 spaced apart from the first infrared emitting unit 21 by more than a certain distance, and an infrared light receiving unit 23 located at the center of the first and second infrared emitting units, the infrared emitting unit 21 and the infrared emitting unit 22 include an infrared light emitting diode (IRED) for emitting infrared light, and the infrared receiving unit 23 includes a Photodiode (PD) or a Photo Transistor (PT) or a photo resistor (PTR) for detecting the amount of reflected light. The first infrared emitting unit 21 and the second infrared emitting unit 22 emit different infrared signals, the infrared signals are reflected by the hand 24 and then are incident on the infrared receiving unit 23 to generate current signals, and the infrared gesture sensor 2 judges the sequence of receiving the infrared signals emitted by the first infrared emitting unit 21 and the second infrared emitting unit 22 and then reflected by the hand according to the electric signals generated by the infrared receiving unit 23, so that the moving direction of the hand is judged. When the hand 24 moves from a to B, the infrared receiving unit 23 receives the infrared ray emitted from the first infrared emitting unit 21 and reflected by the hand 24, and then receives the infrared ray emitted from the second infrared emitting unit 22 and reflected by the hand 24, and the infrared gesture sensor recognizes the gesture as "left to right".
In some application occasions, such as human-computer interfaces of electrical equipment such as a range hood, a water heater and the like, a user not only wants to use an infrared key, but also wants to use an infrared gesture to control the electrical equipment, wants to use infrared proximity detection when the distance to the electrical equipment is short, and wants to use the infrared gesture to control the electrical equipment when the distance to the electrical equipment is long, but only has an infrared proximity sensor and an infrared gesture sensor which are independent at present, so that the cost is high, and the application is complex.
Therefore, an infrared sensor integrating an infrared key and an infrared gesture is not provided in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art's defect, provide an infrared sensor module.
In order to realize the above purpose, the utility model adopts the following technical scheme:
an infrared sensor module comprises at least two infrared sensors and a controller; each infrared sensor of the at least two infrared sensors comprises an infrared transmitting unit and an infrared receiving unit;
an infrared emission unit for emitting infrared light to a detection object;
an infrared receiving unit for receiving infrared light reflected from a detection object and converting the infrared light into an electric signal;
and the controller is connected with the at least two infrared sensors and is used for realizing the infrared proximity detection function according to the electric signals output by each infrared sensor and realizing the gesture recognition function according to the electric signals output by the at least two infrared sensors.
Further, the infrared emission unit includes an infrared light emitting diode for emitting infrared light.
Further, the infrared receiving unit comprises a photodiode, a phototriode or a photoresistor, and the photodiode, the phototriode or the photoresistor is used for detecting the quantity of reflected light.
Further, the controller is further used for controlling each infrared sensor to work in a time-sharing mode, and obtaining the amplitude, the amplitude change speed, the peak amplitude and the time sequence output by each infrared sensor.
Further, the controller comprises an interface unit connected with the upper computer, and the interface unit is used for communicating with the upper computer or driving the controlled equipment.
Further, the controller further includes a storage unit for storing a program, an algorithm expressed in the form of a program, and data required for the operation of the controller.
Furthermore, the infrared emission unit further comprises a current-limiting resistor, a bias resistor, a triode and a power supply voltage, the controller is connected with one end of the bias resistor, the other end of the bias resistor is connected with the input end of the triode, the power supply voltage at one end of the current-limiting resistor is connected, the other end of the current-limiting resistor is connected with one end of the infrared light-emitting diode, and the other end of the infrared light-emitting diode is connected with the output end of the triode.
Further, the infrared receiving unit further comprises a first operational amplifier, a second operational amplifier, a resistor R3, a resistor R4 and a resistor R5, wherein one end of the photodiode, the phototriode or the photoresistor is respectively connected with the input end of the first operational amplifier and one end of the resistor R3, the output end of the first operational amplifier and the other end of the resistor R3 are respectively connected with one end of the resistor R4, the other end of the resistor R4 is respectively connected with the input end of the second operational amplifier and one end of the resistor R5, and the output end of the second operational amplifier and the other end of the resistor R5 are respectively connected with the controller.
Further, the distance between the infrared sensors is 40 mm.
Compared with the prior art, the beneficial effects of the utility model are that: the infrared sensor module can realize gesture recognition and infrared proximity detection, and can be applied to non-contact control of various electrical devices.
Drawings
Fig. 1 is a schematic view of an arrangement of an infrared transmitting unit and an infrared receiving unit in an infrared proximity sensor in the related art provided in the background art;
FIG. 2 is a schematic diagram illustrating an arrangement of an infrared transmitting unit and an infrared receiving unit in an infrared gesture sensor according to the prior art;
FIG. 3 is a block diagram of an infrared sensor module according to one embodiment;
FIG. 4 is a schematic circuit diagram of an infrared emission unit provided in the first embodiment;
FIG. 5 is a schematic circuit diagram of an IR receiving unit according to an embodiment;
FIG. 6 is a schematic diagram illustrating the position of an infrared sensor according to an embodiment;
FIG. 7 is a schematic diagram of an optical path configuration for proximity detection provided in accordance with an embodiment;
FIG. 8 is a schematic diagram of an optical path configuration for gesture motion detection according to an embodiment;
FIG. 9 is a flowchart illustrating a method for recognizing proximity detection and gesture actions according to an embodiment.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The utility model aims at prior art's defect, provide an infrared sensor module.
It should be noted that the present embodiment is an improvement on the circuit structure, and how to receive signals, output signals, control signals, acquire signals, and the like in the present invention is not what the present invention intends to protect, and all of them can be realized by the existing technology.
Example one
The present embodiment provides an infrared sensor module, including at least two infrared sensors and a controller; each infrared sensor of the at least two infrared sensors comprises an infrared transmitting unit and an infrared receiving unit;
an infrared emission unit for emitting infrared light to a detection object;
an infrared receiving unit for receiving infrared light reflected from a detection object and converting the infrared light into an electric signal;
and the controller is connected with the at least two infrared sensors and is used for realizing the infrared proximity detection function according to the electric signals output by each infrared sensor and realizing the gesture recognition function according to the electric signals output by the at least two infrared sensors.
In this embodiment, 3 infrared sensors are taken as an example for specific description, but the number of the infrared sensors is not limited to 3, and only two or more infrared sensors are needed, and the number of the infrared sensors can be specifically set according to actual situations.
In the present embodiment, the detection target is a hand, and the hand will be described below.
As shown in fig. 3, the infrared sensor module includes a first infrared sensor 31, a second infrared sensor 32, a third infrared sensor 33, and a controller 34. The first infrared sensor 31 includes a first infrared transmitting unit 311 and a first infrared receiving unit 312, the second infrared sensor 32 includes a second infrared transmitting unit 321 and a second infrared receiving unit 322, and the third infrared sensor 33 includes a third infrared transmitting unit 331 and a first infrared receiving unit 332.
As shown in fig. 4, the first infrared emitting unit 311, the second infrared emitting unit 321, and the third infrared emitting unit 331 each include an infrared light emitting diode IRED for emitting infrared light, a current limiting resistor R2, a bias resistor R1, and a transistor TR 1; the controller 34 is connected with one end of a bias resistor R1, the other end of the bias resistor R1 is connected with the input end of a triode TR1, one end of a current-limiting resistor R2 is connected with a power supply voltage VCC, the other end of the current-limiting resistor R2 is connected with one end of an infrared light-emitting diode IRED, and the other end of the infrared light-emitting diode IRED is connected with the output end of a triode TR 1.
The controller 34 of this embodiment controls whether the infrared light emitting diode IRED emits an infrared signal by turning on and off the transistor TR1, the current limiting resistor R2 and the power supply voltage VCC determine the emission current of the infrared light emitting diode IRED, and the emission current of the infrared light emitting diode IRED can be adjusted by adjusting the resistance of the current limiting resistor R2.
The first infrared receiving unit 312, the second infrared receiving unit 322, and the third infrared receiving unit 332 each include a photodiode PD or a phototransistor PT or a photoresistor PTR for detecting the amount of reflected light. This embodiment is specifically described with reference to the photodiode PD.
As shown in fig. 5, each of the infrared receiving unit 312, the second infrared receiving unit 322, and the third infrared receiving unit 332 further includes a first operational amplifier Vref1, a second operational amplifier Vref2, and an amplifying circuit composed of a resistor R3, a resistor R4, a resistor R5, and the like; one end of the photodiode PD is connected to the input end of the first operational amplifier Vref1 and one end of the resistor R3, the output end of the first operational amplifier Vref1 and the other end of the resistor R3 are both connected to one end of the resistor R4, the other end of the resistor R4 is connected to the input end of the second operational amplifier Vref2 and one end of the resistor R5, and the output end of the second operational amplifier Vref2 and the other end of the resistor R5 are both connected to the controller 34.
The present embodiment can change the gain of the amplifier by adjusting the resistance of the resistor R3 and the ratio of the resistor R4 and the resistor R5, so that the amplitude of the voltage output by the amplifier to the controller 34 is in a proper range.
Fig. 6 is a schematic position diagram of the infrared sensors, in which the first infrared sensor 31, the second infrared sensor 32 and the third infrared sensor 33 are arranged on the same axis at equal intervals, and the center-to-center distance is 40mm, so that each infrared sensor is ensured not to affect each other, and the peak value and the time sequence of the electric signals output by two adjacent infrared sensors can be detected during gesture recognition.
The present embodiment configures the respective infrared sensors to be at appropriate positions to ensure that the controller can read out the magnitude and the magnitude change speed of the output electric signal of each infrared sensor at the time of the proximity detection function, and read out the peak magnitudes and the time sequence of the output electric signals of at least two infrared sensors at the time of gesture recognition.
As shown in fig. 7, in the present embodiment, the first infrared sensor 31 is taken as an example to describe the optical path configuration (i.e., an infrared key, a touch key) of the proximity detection, and the infrared rays emitted by the first infrared emitting unit 311 are reflected by the hand and then received by the first infrared receiving unit 312; when the finger is at the position C, the output amplitude of the infrared receiving unit 312 is close to 0; as the hand moves in the direction D, the output amplitude of the infrared receiving unit 312 gradually increases and exceeds the proximity detection threshold Vp; as the finger reaches the D position, the output amplitude of the infrared receiving unit 312 reaches a peak.
As shown in fig. 8, in the optical path configuration for gesture motion detection, the infrared sensor 31, the infrared sensor 32, and the infrared sensor 33 emit infrared signals and receive infrared signals reflected by the hand; when the hand is at the position E, the reflection area is small, the infrared light signal obtained by the infrared sensor 31 is weak, and the output amplitude is small; when the hand is at the position F, the reflection area is the largest, the infrared light signal obtained by the infrared sensor 31 is the strongest, and the output amplitude reaches the peak value; when the hand is at the position G, the reflection area becomes small, the infrared light signal obtained by the infrared sensor 31 becomes weak, and the output amplitude thereof also becomes small; the output amplitude of the infrared sensor 31 becomes larger from small to smaller in peak value when the hand moves from E to G via F. The output amplitudes of the infrared sensor 32 and the infrared sensor 33 change with the manual movement, which is the same as that of the sensor 31, namely, the output amplitude of the infrared sensor 32 gradually increases from H to I, takes a peak value at I, and decreases from I to J; the output amplitude of the infrared sensor 33 becomes larger from K to L and takes a peak at L and becomes smaller from L to M.
It should be noted that, during the approach detection, the moving direction of the hand is from far to near along the normal direction of the infrared transmitting unit, the effective reflection area of the hand is increased, and the radiation intensity of the infrared rays transmitted by the infrared transmitting unit is increased with the decrease of the distance from the infrared transmitting unit, the two are superposed, the intensity of the infrared rays received by the infrared receiving unit is increased rapidly, which brings about the rapid increase of the output amplitude of the infrared receiving unit; when the infrared gesture is detected, the motion direction of the hand is along the radial direction of the infrared emission unit, the infrared radiation intensity is basically unchanged, the effective reflection area of the hand is changed, and the output amplitude of the infrared receiving unit changes slowly; the magnitude of the amplitude and the speed of change can be used as features for distinguishing the proximity detection from the gesture detection.
In the present embodiment, the controller 34 controls each infrared sensor to operate in a time-sharing manner, so as to obtain the amplitude, the amplitude variation speed, the peak amplitude and the time sequence of the output of each infrared sensor; and the controller 34 further controls the infrared emitting units of the respective infrared sensors to alternately emit the infrared light signals of two or more emission intensities.
In this embodiment, the controller 34 further includes an interface unit 342 for communicating with the upper computer or directly driving the controlled electrical devices.
The controller 34 further includes a storage unit 341 for storing a program, an algorithm expressed in the form of a program, and data required for the operation of the controller.
The method for recognizing the proximity detection and the gesture action of the embodiment is as follows:
the infrared sensors work in sequence, an infrared transmitting unit is included to transmit infrared signals, and an infrared receiving unit is included to receive reflected infrared signals.
The controller identifies and judges the electric signals output by the infrared receiving units of the infrared sensors:
and if the output amplitude of one infrared receiving unit is continuously and repeatedly greater than the approach detection threshold value and the output amplitude is continuously increased, and the increasing speed is greater than a certain value, judging that the infrared sensor detects an approach signal.
If the output amplitude of one infrared receiving unit is continuously and repeatedly greater than the gesture detection threshold value, the output amplitude gradually increases to the peak value and gradually decreases, and the time difference of the output peak value points of the adjacent infrared receiving units is within a certain range, judging that a gesture signal is recognized; the specific gesture signal is determined according to the sequence and the position relation of the appearance peak values of the adjacent infrared receiving units.
As shown in fig. 9, the method for recognizing the proximity detection and the gesture motion specifically includes:
s910 the first infrared transmitting unit 311 transmits an infrared signal;
s911 the first infrared receiving unit 312 receives the reflected infrared signal and outputs a voltage V1;
s912 sequentially stores the output voltage V1 into the array Va in the memory 341, and when the array Va is full, stores the output voltage into the first bit in the array Va; the size of Va can be reasonably set according to the size of the memory and the scanning speed of the controller, which is 200 in this embodiment;
s913 whether n continuous output voltage amplitudes in the array Va are larger than the approaching detection threshold voltage Vp and continuously increase, the increasing speed is higher than the approaching detection increasing speed threshold Sp, if so, S914 is executed, otherwise, S916 is executed; the arrays Va are connected end to end and are regarded as continuous; the sizes of n and Sp are reasonably set, the proximity detection recognition rate is reduced when n and Sp are too large, and the proximity detection false recognition rate is improved when n and Sp are too small;
s914 recognizes the proximity detection signal, and the controller 34 sends the proximity detection signal corresponding to the first infrared sensor 31 to the upper computer through the interface unit 342 or directly drives the electrical device to execute a corresponding action.
S915, clearing the array Va, and executing S910;
s916, whether m continuous output voltage amplitudes in the array Va are larger than the gesture detection threshold voltage and meet the characteristics of gradually increasing, peaking and gradually decreasing, if yes, S940 is executed, and if not, S910 is executed; the arrays Va are connected end to end and are regarded as continuous; m needs to be reasonably set, the proximity detection recognition rate is reduced due to overlarge m, and the proximity detection false recognition rate is improved due to the overlarge m.
S920 the second infrared transmitting unit 321 transmits an infrared signal;
s921 the second infrared receiving unit 322 receives the reflected infrared signal and outputs a voltage V2;
s922 sequentially stores the output voltage V2 into an array Vb in the memory 341, and when the array Vb is full, stores the output voltage into a first bit in the array Vb; vb and Va are the same in size;
s923, whether n continuous output voltage amplitudes in the array Vb are larger than the approaching detection threshold voltage Vp and continuously increase, the increasing speed is higher than the approaching detection increasing speed threshold Sp, if so, S924 is executed, and if not, S926 is executed; the arrays Vb are connected end to end and are regarded as continuous;
s924 recognizes the proximity detection signal, and the controller 34 sends the proximity detection signal corresponding to the second infrared sensor 32 to the upper computer through the interface unit 342 or directly drives the electrical device to execute a corresponding action.
S925, clearing the array Vb, and executing S920;
s926 whether m continuous output voltage amplitudes are larger than the gesture detection threshold voltage and the amplitudes accord with the characteristics of gradual increase, peak value and gradual decrease or not is determined in the array Vb, if so, S940 is executed, and if not, S920 is executed; the arrays Vb are connected end to end and are regarded as continuous;
s930 the third infrared transmitting unit 331 transmits an infrared signal;
s931 the third infrared receiving unit 332 receives the reflected infrared signal and outputs a voltage V3;
s932, the output voltage V3 is sequentially stored in the array Vc in the memory 341, and when the array Vc is full, the output voltage V3 is stored in the first bit in the array Vc; vc is the same as Va and Vb in size;
whether n continuous output voltage amplitudes in the array Vc of the S933 are larger than the approaching detection threshold voltage Vp and continuously increase, the increasing speed is higher than the approaching detection speed increasing threshold value Sp, if so, S934 is executed, otherwise, S936 is executed; the arrays Vc are connected end to end and are regarded as continuous;
s934 recognizes the proximity detection signal, and the controller 34 sends the proximity detection signal corresponding to the third infrared sensor 33 to the upper computer through the interface unit 342 or directly drives the electrical device to execute a corresponding action.
S935 the array Vc is cleared, and S930 is executed;
s936 whether m continuous output voltage amplitudes in the array Vc are larger than the gesture detection threshold voltage and meet the characteristics of gradual increase, peak value and gradual decrease, if yes, executing S940, and if not, executing S930; the arrays Vc are connected end to end and are regarded as continuous;
whether the peak voltages in the output voltage arrays Va, Vb and Vc of S940 arrive in order or not, and the time intervals of two adjacent peak values (namely the peak voltages in Va and Vb and the peak voltages in Vb and Vc) are within a set time interval, namely, the time intervals are greater than or equal to T1 and less than or equal to T2(T1< T2), if yes, S941 is executed; if not, executing S942; the T1 and T2 need to be set reasonably to ensure the speed of the detected gesture motion within a certain range.
S941 recognizes a gesture signal, and the controller 34 determines a gesture action according to the sequence of the voltage peak values output by the first infrared sensor 31, the second infrared sensor 32, and the third infrared sensor 33. For example, the output voltage peak values of the first infrared sensor 31, the second infrared sensor 32, and the third infrared sensor 33 are in the order of the first infrared sensor 31, the second infrared sensor 32, and the third infrared sensor 33, and the positions of the sensors shown in fig. 4 are combined, so that the left-right gesture can be determined. The controller sends the left-right gesture signals to the upper computer through the interface unit 342 or directly drives the electrical equipment to execute corresponding actions.
S942 clears the arrays Va, Vb, Vc, and executes S910, S920, S930.
The infrared sensor 31, the infrared sensor 32 and the infrared sensor 33 work in a time-sharing manner, and the emitted infrared signal is a pulse infrared signal.
The detection recognition threshold voltage Vp and the gesture recognition threshold voltage Vg are set in advance according to the proximity detection distance and the gesture detection distance, and generally Vp is larger than Vg.
Compared with the prior art, the beneficial effect of this embodiment is: the infrared sensor module can realize gesture recognition and infrared proximity detection, and can be applied to non-contact control of various electrical devices.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (9)
1. An infrared sensor module comprises at least two infrared sensors and is characterized by further comprising a controller; each infrared sensor of the at least two infrared sensors comprises an infrared transmitting unit and an infrared receiving unit;
an infrared emission unit for emitting infrared light to a detection object;
an infrared receiving unit for receiving infrared light reflected from a detection object and converting the infrared light into an electric signal;
and the controller is connected with the at least two infrared sensors and is used for realizing the infrared proximity detection function according to the electric signals output by each infrared sensor and realizing the gesture recognition function according to the electric signals output by the at least two infrared sensors.
2. The infrared sensor module as set forth in claim 1, wherein the infrared emission unit includes an infrared light emitting diode for emitting infrared light.
3. The infrared sensor module as claimed in claim 1, wherein the infrared receiving unit comprises a photodiode or a phototransistor or a photoresistor, and the photodiode or the phototransistor or the photoresistor is configured to detect an amount of reflected light.
4. The infrared sensor module as claimed in claim 1, wherein the controller is further configured to control each infrared sensor to operate in a time-sharing manner, and obtain the amplitude, the amplitude variation speed, the peak amplitude and the time sequence of the output of each infrared sensor.
5. The infrared sensor module as claimed in claim 1, wherein the controller comprises an interface unit connected to the upper computer, the interface unit being configured to communicate with the upper computer or drive a controlled device.
6. The infrared sensor module as set forth in claim 1, wherein the controller further comprises a storage unit for storing a program, an algorithm expressed in the form of a program, and data required for the operation of the controller.
7. The infrared sensor module as claimed in claim 2, wherein the infrared emission unit further includes a current limiting resistor, a bias resistor, a transistor, and a power supply voltage, the controller is connected to one end of the bias resistor, the other end of the bias resistor is connected to an input terminal of the transistor, one end of the current limiting resistor is connected to the power supply voltage, the other end of the current limiting resistor is connected to one end of the infrared light emitting diode, and the other end of the infrared light emitting diode is connected to an output terminal of the transistor.
8. The infrared sensor module as claimed in claim 3, wherein the infrared receiving unit further comprises a first operational amplifier, a second operational amplifier, a resistor R3, a resistor R4, and a resistor R5, one end of the photodiode, the phototransistor, or the photoresistor is connected to the input end of the first operational amplifier and one end of the resistor R3, respectively, the output end of the first operational amplifier and the other end of the resistor R3 are both connected to one end of the resistor R4, the other end of the resistor R4 is connected to the input end of the second operational amplifier and one end of the resistor R5, respectively, and the output end of the second operational amplifier and the other end of the resistor R5 are both connected to the controller.
9. The infrared sensor module as set forth in claim 1, wherein the distance between the respective infrared sensors is 40 mm.
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| CN113834469A (en) * | 2021-09-23 | 2021-12-24 | 深圳市微特精密科技股份有限公司 | Method and device for identifying flattening calibration of DUT (device under test) by infrared reflection sensor |
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| CN113834469A (en) * | 2021-09-23 | 2021-12-24 | 深圳市微特精密科技股份有限公司 | Method and device for identifying flattening calibration of DUT (device under test) by infrared reflection sensor |
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