JP2010175344A - Arrangement structure of temperature sensor, temperature calibration device, and temperature calibration method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure of temperature sensors, a temperature calibration device and a temperature calibration method, capable of correcting highly accurately by a simpler constitution, and reducing manufacturing cost and operation cost, when correcting a measured temperature by a temperature sensor, with a reference temperature of a reference temperature sensor. <P>SOLUTION: In this arrangement structure of temperature sensors including a support for supporting temperature sensors 3, a cylindrical body cylinder part 1 formed so that the air A can be circulated through the inside is included as the support, a plurality of temperature sensors 3 formed respectively in the bar shape are arranged radially in the inserted state into the body cylinder part 1 from the radial direction outside of the body cylinder part 1 toward the axial core X direction, and a fan 5 is also included, for circulating the air A from one end 1a of the body cylinder part 1 toward the other end 1b thereof, and supplying the air A to the temperature sensors 3 arranged radially. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes an arrangement structure of a temperature sensor provided with a support for supporting the temperature sensor, and a temperature that includes the arrangement structure of the temperature sensor, and corrects the measured temperature of the temperature sensor with the reference temperature measured by the reference temperature sensor. The present invention relates to a temperature calibration apparatus provided with a correction means, and a temperature calibration method using the temperature calibration apparatus.

  Conventionally, in such a temperature sensor temperature calibration device, the temperature difference between the measured temperature of a plurality of temperature sensors and the reference temperature of the reference temperature sensor is measured, and a correction value is calculated so that this temperature difference is reduced. When correcting (calibrating) the measured temperature using this correction value, the following temperature sensor arrangement structure has been adopted.

For example, a temperature sensor arrangement structure in which a plurality of temperature sensors formed in a rod shape are arranged in a bundle in a state where they are closely packed in parallel, and a reference temperature sensor is arranged in parallel in a state slightly separated from the bundle of temperature sensors Can be illustrated.
However, in this temperature sensor arrangement structure, a plurality of temperature sensors are arranged in a bundle in a closely packed state, so that the air around the temperature sensor is heated by the self-heating of the temperature sensor. Therefore, the temperature sensor located around the temperature sensor measures the temperature of the air heated by the self-heating of the temperature sensor. As a result, there is a problem that air at different temperatures is measured by each temperature sensor (so-called mutual interference) even though the air at the same temperature existing in the atmosphere is being measured.

  In order to solve this problem, in order not to be affected by self-heating, for example, a plurality of temperature sensors formed in a bar shape are arranged in parallel and spaced apart from each other, and one end of the temperature sensor arranged in parallel is arranged. Although the temperature sensor arrangement structure in which the reference temperature sensor is arranged in parallel to the side can be illustrated, it is difficult to allow air of the same temperature to flow through a plurality of temperature sensors. In this case, since the temperature sensors are arranged in a separated state, the arrangement space is widened, and each of the reference temperature measured by the reference temperature sensor arranged on one end side and the plurality of temperature sensors arranged on the other end side is provided. There is a problem in that the measured temperature difference (temperature unevenness) occurs between the measured temperatures and accurate correction is difficult.

  On the other hand, as the temperature sensor arrangement structure and the temperature calibration device, a thermostat block (corresponding to the reference temperature sensor of the present application) that can accommodate a plurality of temperature sensors and calibration temperature sensors (corresponding to the reference temperature sensor of the present application), and a thermostat block There is a temperature sensor arrangement structure and a temperature calibration device provided with a heater that heats the battery to a uniformly heated state (see, for example, Patent Document 1).

  In the temperature sensor arrangement structure and temperature calibration device described in Patent Document 1, a thermostat block is formed in a cylindrical shape, and a storage hole that can store sensing portions of a plurality of temperature sensors in a direction parallel to the axis of the thermostat block. Are provided in one end face of the constant temperature block in the circumferential direction, and one accommodation hole is provided near the center of the end face for accommodating the sensing part of the calibration temperature sensor in a direction parallel to the axis of the constant temperature block. It is configured.

  In the temperature sensor arrangement structure and the temperature calibration device described in Patent Document 1, the temperature sensor and the temperature sensor for calibration are placed in each storage hole (sealed space) and the heater is energized to keep the temperature constant. Each storage hole of the block is maintained at a uniform temperature, the measurement temperature of the plurality of temperature sensors and the reference temperature of the calibration temperature sensor are measured, and the measurement temperature and the reference temperature are respectively compared. If the measured temperature has a large temperature difference with respect to the reference temperature, the temperature sensor is replaced as defective, and if there is almost no temperature difference, the temperature sensor is used as it is (calibration). By doing this, the temperature difference between the multiple temperature sensors and the calibration temperature sensor can be eliminated as much as possible, and by placing multiple temperature sensors with small temperature differences at each temperature detection point, the temperature at each temperature detection point can be adjusted. It can be accurately monitored.

JP 2000-304627 A

However, in the temperature sensor arrangement structure and the temperature calibration device described in Patent Document 1, a thermostatic block having a plurality of storage holes for storing a plurality of temperature sensors and calibration temperature sensors, respectively, and a heater for heating the temperature block are provided. Although it is necessary to provide, the configuration of the constant temperature block that can maintain a plurality of storage holes at a uniform temperature and the configuration of a heater that can heat this constant temperature block to a uniform temperature are relatively complicated, and the device configuration is compared. There is a problem that the manufacturing cost is likely to be large. This problem appears more prominent particularly when correction is performed with high accuracy so that the temperature difference between the measured temperature of the temperature sensor and the reference sensor of the calibration temperature sensor is as small as possible.
Moreover, since it is the structure which heats a constant temperature block with a heater, it is preferable that comparatively much energy for heating is required and operation cost can be reduced more.

  The present invention has been made in view of the above problems, and its purpose is to correct the measured temperature of the temperature sensor with the reference temperature of the reference temperature sensor with high accuracy with a simpler configuration. It is in providing a temperature sensor arrangement structure, a temperature calibration device, and a temperature calibration method that can reduce manufacturing costs and operation costs.

In order to achieve the above object, a temperature sensor arrangement structure according to the present invention is a temperature sensor arrangement structure including a support body that supports the temperature sensor, and the characteristic configuration is that air is provided inside the support body. A plurality of temperature sensors formed in a rod shape having a cylindrical main body cylindrical portion formed to allow flow therethrough are inserted into the main body cylindrical portion from the radially outer side of the main body cylindrical portion toward the axial center direction. Are arranged in a radial pattern,
The air cylinder is provided with a fan that allows air to flow from one end to the other end of the main body cylindrical portion and supplies the air to the radially arranged temperature sensors.

According to the above-described characteristic configuration, the plurality of temperature sensors formed in a rod shape on the cylindrical main body cylindrical portion formed so as to allow air to flow therein are directed from the radially outer side of the main body cylindrical portion toward the axial direction. It is arranged in a radial manner in a state where it is inserted into the main body cylindrical portion, and only has a fan that allows air to flow from one end of the main body cylindrical portion to the other end. The arrangement structure of the temperature sensor can be reduced.
In addition, while having such a simple configuration, the air flowing through the inside of the main body cylindrical portion is uniformly supplied by a fan to a plurality of temperature sensors arranged radially in the main body cylindrical portion in a substantially orthogonal state. Therefore, self-heating of the plurality of temperature sensors can be satisfactorily prevented, and each measured temperature of the plurality of temperature sensors can be set to a temperature accurately reflecting the temperature of air in the atmosphere. As a result, it is possible to correct the measured temperature with the reference temperature of the reference temperature sensor using the accurate measured temperatures of the plurality of temperature sensors, and the atmosphere when the corrected temperature sensor is placed at the measurement target location. It is possible to prevent the measured temperature from increasing from the internal temperature by the amount of the temperature increase due to the self-heating, and to correct the measured temperature with high accuracy.
Furthermore, since it is configured to drive a fan with relatively low power consumption without using a device with high power consumption such as a heater, the operating cost for correcting the temperature measured by the temperature sensor with the reference temperature of the reference temperature sensor Can be reduced.

  A further characteristic configuration of the arrangement structure of the temperature sensor according to the present invention is that a reference temperature sensor formed in a rod shape is arranged on the shaft core in parallel with the shaft core of the main body cylindrical portion.

  According to the above characteristic configuration, the reference temperature sensor formed in a rod shape is arranged on the shaft core in parallel with the shaft core of the main body cylindrical portion, so that the air flow in the main body cylindrical portion by the fan is prevented. In addition, the distance between the plurality of temperature sensors arranged radially in the main body cylindrical portion and the reference temperature sensor can be kept uniform. As a result, the reference temperature of the reference temperature sensor and the measured temperature of the plurality of temperature sensors in the main body cylindrical portion can be made the same as the temperature of the air in the atmosphere, and the occurrence of temperature unevenness between the reference temperature and the measured temperature is prevented. Thus, it is possible to perform highly accurate correction when correcting the measured temperature with the reference temperature.

  According to a further feature of the arrangement structure of the temperature sensor according to the present invention, the fan is provided on the other end side of the main body cylindrical portion, and the reference temperature sensor and the temperature are arranged upstream of the air flow direction by the fan. The sensor is located.

  According to the above characteristic configuration, the fan is provided on the other end side of the main body cylindrical portion, and the reference temperature sensor and the temperature sensor are arranged on the upstream side in the air flow direction by the fan. After the air flowing from the side to the other end side is supplied to the reference temperature sensor and the temperature sensor, the air passes through the fan. Thereby, it is possible to prevent the occurrence of problems such as that the air flowing through the main body cylindrical portion becomes air with temperature unevenness under the influence of the heat generated by the fan.

  A further characteristic configuration of the arrangement structure of the temperature sensor according to the present invention includes a main body pedestal portion that supports the main body cylindrical portion at a lower portion of the main body cylindrical portion, and is discharged from the other end side of the main body cylindrical portion by the fan. The air is introduced from the upper part of the main body pedestal part, flows through the inside, and is discharged from the side part of the main body pedestal part.

According to the above characteristic configuration, the air discharged from the other end side of the main body cylindrical portion by the fan is introduced from the upper portion of the main body pedestal portion, flows inside, and is discharged from the side portion of the main body pedestal portion. Without obstructing the flow of air flowing through the inside of the cylindrical portion, the air can be discharged to the outside from the other end side of the main body cylindrical portion via the upper portion and the side portion of the main body base portion.
Further, in addition to not hindering the air flow, it is only necessary to place the main body pedestal part on the floor part of the temperature control target space or the like, and it is possible to make the structure very easy to carry and handle.

In order to achieve the above object, a temperature calibration apparatus according to the present invention comprises temperature correction means for correcting the measurement temperature of a temperature sensor that measures the temperature in the temperature adjustment target space with the reference temperature measured by the reference temperature sensor. The temperature calibration device includes a temperature sensor arrangement structure according to any one of the above-described characteristic configurations, and the temperature sensor and the reference temperature sensor are arranged in the temperature sensor arrangement structure. ,
The temperature correction means drives the fan to measure the measured temperature of the temperature sensor and the reference temperature of the reference temperature sensor, and corrects the measured temperature of the temperature sensor with the reference temperature of the reference temperature sensor. It is in the point which is comprised.

  According to the above characteristic configuration, in the state where the temperature sensor and the reference temperature sensor are arranged in the arrangement structure of the temperature sensor, the temperature correction unit drives the fan to measure the measurement temperature of the temperature sensor and the reference temperature of the reference temperature sensor. Since the measured temperature of the temperature sensor is corrected with the reference temperature of the reference temperature sensor, when the measured temperature of the temperature sensor is corrected with the reference temperature of the reference temperature sensor, it can be corrected with a simpler configuration and with higher accuracy. In addition, a temperature calibration device that can reduce the manufacturing cost and the operating cost can be configured.

The temperature calibration method according to the present invention for achieving the above object is a temperature calibration method for correcting the measured temperature of the temperature sensor with the reference temperature using the temperature calibration device having the above-described characteristic configuration,
A temperature measurement process is performed by the temperature sensor and the reference temperature sensor within a sampling time, and a correction temperature obtained by correcting the measurement temperature of the temperature sensor in the temperature measurement process with a correction value and the reference temperature sensor in the temperature measurement process A temperature difference from the reference temperature is determined, and a determination process is performed to determine whether the determined temperature difference is within an allowable range. If the temperature difference is outside the allowable range, the temperature difference is within the allowable range. In the configuration to repeatedly execute the temperature measurement process and the determination process until it is within,
The allowable range is set to a first allowable range, and the correction value for the correction value is set to zero in the first determination process, and the temperature difference in the previous determination process is determined to be the previous determination process in the second and subsequent determination processes. Performing the first correction step using the updated correction value updated by adding to the correction value in
When the temperature difference falls within the first allowable range, the allowable range is set to a second allowable range that is set narrower than the first allowable range, and the correction value is determined in the first determination process. Using the correction value when the temperature difference falls within the first allowable range in the first correction step, the temperature difference in the previous determination process is changed to the correction value in the previous determination process in the second and subsequent determination processes. Executing the second correction step using the updated correction value added and updated;
A correction value obtained when the temperature difference is determined to be within the second allowable range in the second correction step is obtained as a correction value for calibration when the measured temperature is corrected with the reference temperature, and the measured temperature The correction value for calibration is added to the point to correct the measured temperature.

According to the above characteristic configuration, in the first correction step, first, the first temperature measurement process and the determination process are performed. The correction value at this time is set to zero, and the temperature difference between the correction temperature and the reference temperature is the first allowable value. It is determined whether it is within the range. If the temperature difference is within the first allowable range, it can be determined that the measured temperature is within the first allowable range with respect to the reference temperature, so that the correction value remains zero. If the temperature difference is outside the first allowable range, it can be determined that the measured temperature is not within the first allowable range with respect to the reference temperature, so the correction value is updated by adding the temperature difference at that time, and the second time A temperature measurement process and a discrimination process are performed. As a result, in the second and subsequent determination processes, the measured temperature is corrected to the corrected temperature using the updated correction value, so it is determined whether or not the corrected temperature is within the first allowable range with respect to the reference temperature. be able to. In this manner, in the first correction step, the correction value can be obtained so that the measured temperature is within the first allowable range with respect to the reference temperature.
In the second correction process, the temperature measurement process and the determination process are performed as in the first correction process. In the first determination process, correction is performed when the temperature difference is within the first allowable range in the first correction process. Use the value. As a result, on the premise of a correction value that makes the measured temperature within the first allowable range with respect to the reference temperature, the measured temperature is within the second allowable range that is narrower than the first allowable range with respect to the reference temperature. A correction value can be obtained.
Then, the correction value when the temperature difference is determined to be within the second allowable range in the second correction step is obtained as a correction value for calibration when the measured temperature is corrected at the reference temperature. The measured temperature can be corrected to the reference temperature with high accuracy by the calibration correction value.

The perspective view which shows schematic structure of the temperature calibration apparatus provided with the arrangement structure of the temperature sensor which concerns on this invention Schematic longitudinal section of temperature calibration device Schematic cross-sectional view in the direction of arrow III in FIG. Schematic cross-sectional view in the direction of arrow IV in FIG. The flowchart which shows the determination process which determines whether the reference temperature of the reference temperature sensor is stable in the temperature calibration method, and a 1st correction process. Flow chart showing second correction step in temperature calibration method (A) is a graph showing the relationship between the corrected temperature and the elapsed time when correcting the measured temperature of the temperature sensor using the temperature calibration device according to the present application, and (b) is a bundle of temperature sensors. Graph showing the relationship between the corrected temperature and the elapsed time when the measured temperature of the temperature sensor is corrected using a conventional temperature calibration device

Hereinafter, an embodiment of a temperature calibration apparatus having a temperature sensor arrangement structure according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a schematic configuration of a temperature calibration device 50 (hereinafter, abbreviated as a temperature calibration device 50) having a temperature sensor arrangement structure according to the present invention, and FIG. 3 is a schematic cross-sectional view in the direction of arrow III in FIG. 2, and FIG. 4 is a schematic cross-sectional view in the direction of arrow IV in FIG.

First, the configuration of the temperature calibration device 50 will be described.
The temperature calibration device 50 arranges a plurality of temperature sensors 3 at each temperature measurement location in a temperature adjustment target space (not shown), and measures the temperature at each temperature measurement location before measuring the temperature at each temperature measurement location. Whether or not 3 indicates the temperature accurately is determined by comparison with the reference temperature of the reference temperature sensor 4 serving as a reference. If the temperature is accurately indicated, the temperature sensor 3 is used as it is and is accurately indicated. If not, it is used after correcting (calibrating) the measured temperature of the temperature sensor 3 so that the temperature at each temperature measurement location can be measured accurately.

  Here, as shown in FIGS. 1 and 2, the plurality of temperature sensors 3 and the reference temperature sensor 4 are known temperature sensors that can convert the temperature into an electrical signal. For example, the resistance temperature sensor, the thermocouple, and the semiconductor A thermometer or the like can be used. The plurality of temperature sensors 3 and the reference temperature sensor 4 are formed in a rod shape, one end being temperature detecting portions 3a and 4a and the other end being insertion restricting portions 3b and 4b having an enlarged diameter. Note that the insertion restricting portions 3b and 4b are respectively connected to the temperature correction means 10 in the control means C, which will be described later, so as to be able to input and output the measured temperature information.

  As shown in FIGS. 1 and 2, the temperature calibration device 50 includes a cylindrical main body cylindrical portion 1 (an example of a support that supports the temperature sensor 3) that is formed so that air A can flow therethrough, and a main body. The main body pedestal portion 2 that supports the main body cylindrical portion 1 below the cylindrical portion 1, the fan 5 that allows air A to flow from one end 1a of the main body cylindrical portion 1 toward the other end 1b, and the operation of the temperature calibration device 50 And control means C for controlling the above.

  The main body cylindrical portion 1 is in a state in which air A can flow therethrough, by closely contacting and fixing the sides in the longitudinal direction of a plurality of rectangular flat plates (for example, in FIG. It is formed in a cylindrical shape. In addition, the number of the flat plates for forming in this cylindrical shape can be changed suitably, and an arc-shaped circular arc plate can also be used without using a flat plate. Further, a cylindrical shape having a circular cross section from the time of formation can be used without using a flat plate and an arc plate.

  On one end 1a side of the main body cylindrical portion 1, a reference temperature sensor arrangement stay 7b having a reference temperature sensor insertion portion 7a as a reference temperature sensor arrangement portion 7 on which the reference temperature sensor 4 can be arranged is a diameter of the main body cylindrical portion 1. It is fixedly arranged in the direction. The reference temperature sensor insertion portion 7a is formed as a cylindrical insertion hole that can receive the insertion restriction portion 4b of the reference temperature sensor 4, and has a bottom portion than the insertion hole that can receive the temperature detection portion 4a of the reference temperature sensor 4. It is comprised so that a small diameter through-hole may be provided. Therefore, by inserting the reference temperature sensor 4 into the reference temperature sensor insertion portion 7a from the temperature detection portion 4a side, the lower end portion of the insertion restriction portion 4b is brought into contact with the upper end portion of the reference temperature sensor insertion portion 7a, thereby detecting the temperature. The reference temperature sensor 4 is arranged on the axis X in parallel with the axis X of the main body cylindrical portion 1 in a state where the portion 4a is projected from the lower end of the reference temperature sensor insertion portion 7a toward the plurality of temperature sensors 3. It is configured to be able to.

  A fan 5 is provided on the other end 1 b side of the main body cylindrical portion 1, and air A is sucked into the main body cylindrical portion 1 from the external space by the fan 5, and from the one end 1 a side to the other end 1 b side of the main body cylindrical portion 1. The air A is allowed to flow, and the air A can be discharged to the external space via the upper part 2a and the side part 2b (air discharge hole 8) of the main body pedestal 2 described later. The fan 5 can be a known axial fan, sirocco fan, or the like. In this embodiment, an axial fan is used as shown in FIGS.

  Between the one end 1 a and the other end 1 b of the main body cylindrical portion 1, a cylindrical temperature sensor insertion portion 6 (an example of a temperature sensor arrangement portion) capable of radially arranging the temperature sensors 3 is provided. Are provided in the circumferential direction in a form that penetrates in the radial direction and protrudes into the main body cylindrical portion 1. In FIG. 1, for example, the temperature sensor insertion portion 6 is provided at twelve locations with an equal angle (for example, 30 degrees) in the circumferential direction. The temperature sensor insertion portion 6 is formed as a cylindrical insertion hole capable of receiving the insertion restriction portion 3b of the temperature sensor 3, and has a smaller diameter than an insertion hole capable of receiving the temperature detection portion 3a of the temperature sensor 3 at one end thereof. It is comprised so that a through-hole may be provided. Therefore, by inserting the temperature sensor 3 into the temperature sensor insertion part 6 from the temperature detection part 3a side, the insertion restriction part 3b is brought into contact with one end of the temperature sensor insertion part 6, and the temperature detection part 3a is inserted into the temperature sensor. The plurality of temperature sensors 3 are substantially the same as the axis X of the main body cylindrical portion 1 in a state of protruding from one end of the portion 6 toward the axis X side of the main body cylindrical portion 1 (the temperature detecting portion 4a side of the reference temperature sensor 4). It is comprised so that it can arrange | position radially in the state orthogonally crossed.

  Therefore, in the main body cylindrical portion 1, the adjacent temperature detection units 3 a of the plurality of temperature sensors 3 can be arranged at equal positions, and the temperatures of the plurality of temperature detection units 3 a and the reference temperature sensor 4 can be arranged. Since the distance from the detection unit 4a can be kept uniform, a plurality of temperature sensors 3 and a reference temperature sensor 4 are arranged so as to eliminate the influence of mutual heating between the temperature sensors 3 and the influence of temperature unevenness. It is possible to do.

  The main body pedestal portion 2 is formed in a substantially box shape, and is configured such that the main body cylindrical portion 1 can be disposed and supported on an upper portion 2a thereof. An opening communicating with the other end 1b of the main body cylindrical portion 1 is formed in the upper portion 2a of the main body pedestal portion 2 (corresponding to the other end 1b side of the main body cylindrical portion 1), and the fan 5 is connected to the main body pedestal in this opening. It is fixedly arranged so as to protrude into the portion 2. A plurality of air discharge holes 8 communicating with the external space are formed in the side portion 2 b of the main body pedestal portion 2. In FIG. 1 and FIG. 2, the air discharge hole 8 is formed in, for example, all four side portions 2 b of the main body pedestal portion 2.

  The control unit C includes a central processing unit (CPU), a memory, a storage unit, and the like, and is configured by known information processing unit that can process information by executing a predetermined program by the CPU. As shown in FIG. 2, the control unit C includes a temperature measurement determination processing unit 10 a serving as the temperature correction unit 10, a calibration correction value calculation unit 10 b, and a storage unit 11.

  The temperature measurement determination processing unit 10a performs temperature measurement processing by the temperature sensor 3 and the reference temperature sensor 4 within the sampling time, and corrects the measured temperature of the temperature sensor 3 in the temperature measurement processing by the correction value and the temperature. A temperature difference from the reference temperature of the reference temperature sensor 4 in the measurement process is obtained, and a discrimination process is performed to determine whether or not the obtained temperature difference is within the allowable range. If the temperature difference is outside the allowable range, the temperature difference is determined. Is configured to repeatedly perform the temperature measurement process and the discrimination process until the value falls within the allowable range. Although details of the temperature measurement process and the determination process will be described later, the temperature measurement determination processing unit 10a sets the allowable range to the first allowable range and sets the correction value to zero in the first determination process for the correction value. In the second and subsequent determination processes, a first correction process is performed using the updated correction value that is updated by adding the temperature difference in the previous determination process to the correction value in the previous determination process, and the temperature difference is within the first allowable range. When the value is within, the allowable range is set to a second allowable range that is set to be narrower than the first allowable range, and the correction value has a temperature difference within the first allowable range in the first correction process in the first determination process. The second correction step using the updated correction value updated by adding the temperature difference in the previous determination process to the correction value in the previous determination process in the second and subsequent determination processes. Configuration to do It is.

  The calibration correction value calculation unit 10b corrects the correction value when the temperature measurement determination processing unit 10a determines that the temperature difference is within the second allowable range in the second correction step with the reference temperature. The correction value is obtained as a calibration correction value. Similarly, the calibration correction value calculation unit 10b obtains, as a calibration correction value, a correction value when it is determined that it is within the third allowable range after the third correction process, which is a stepwise correction process. It is also possible to be configured.

  The storage unit 11 stores the measured temperature of the temperature sensor 3 measured by the temperature measurement determination processing unit 10a, the reference temperature of the reference temperature sensor 4, correction values used in the first correction process and the second correction process, and the like. It is configured to be able to.

  The display unit 12 is configured by a known display mechanism such as an LED or LCD, and the measured temperature of the temperature sensor 3 measured by the temperature measurement determination processing unit 10a, the reference temperature of the reference temperature sensor 4, the first correction step, the first correction step, and the like. It is configured to be able to display correction values used in the two correction steps.

  The input unit 13 is configured by a known interface such as a keyboard, and is configured to be able to input a correction value or the like in the first discrimination process used in the first correction process to the temperature correction unit 10 of the control unit C.

The above is the configuration of the temperature calibration device 50 according to the present invention. FIG. 5 and FIG. 6 are used for the temperature calibration method for correcting (calibrating) the measured temperatures of the plurality of temperature sensors 3 using the temperature calibration device 50. This will be described below.
FIG. 5 is a flowchart showing a determination process for determining whether or not the reference temperature of the reference temperature sensor is stable and a first correction step in the temperature calibration method, and FIG. 6 is a second flowchart in the temperature calibration method. It is a flowchart which shows a correction | amendment process.

  As shown in FIG. 5, when the operation of the temperature calibration device 50 is started, the temperature correction means 10 (control means C) drives the fan 5 to rotate at a predetermined rotational speed, thereby causing one end 1a of the main body cylindrical portion 1 to rotate. From the side to the other end 1b, air A having a constant flow rate and a constant flow rate is passed, and the air A is discharged from the side 2b of the main body pedestal 2 to the external space via the upper part 2a of the main body pedestal 2 and the fan 5. Let When a command for setting the correction value BA used for the first discrimination process in the first correction process to 0 is input from the input unit 13 (step # 1), the correction value BA is added to the measured temperature PV of the temperature sensor 3. The automatic correction for obtaining the correction value BA for correcting the measured temperature PV of the temperature sensor 3 is started so that the temperature difference BA between the correction temperature corrected by adding the reference temperature SP and the reference temperature SP of the reference temperature sensor 4 is within the allowable range. (Step # 2).

Then, the temperature measurement determination processing unit 10a of the temperature correction unit 10 performs a determination process for determining whether or not the reference temperature SP measured by the reference temperature sensor 4 is stable (step # 3 to step # 6). This determination process is performed before the first correction process and the second correction process are performed, and the reliability of the reference temperature SP can be improved.
Specifically, in this determination process, the reference temperature SP is acquired Nz times at a sampling period of every X seconds (for example, every 0.02 seconds), and an average value SPa of the reference temperature SP is calculated. At the same time (step # 3), the maximum value SPmax and the minimum value SPmin of the acquired reference temperature SP are acquired every X seconds (step # 4). Then, it is determined whether or not the maximum value SPmax and the minimum value SPmin are within the average value SPa ± Tz of the reference temperature SP (step # 5), and if not within the average value SPa ± Tz (step # 5: No), An alarm is displayed on the display unit 12 (step # 6), the process returns to step # 3, and the calculation of the average value SPa, the acquisition of the maximum value SPmax and the minimum value SPmin, and the above determination are repeated (step # 3 to step # 6). On the other hand, if it is within the average value SPa ± Tz (step # 5: Yes), it is determined that the reference temperature SP is stable, and the first correction process is executed. Therefore, after the reference temperature SP of the reference temperature sensor 4 is in a stable state, in the first correction process and the second correction process, the stable reference temperature SP and the measured temperature PV of the temperature sensor 3 are set to the correction value BA. The temperature difference BAx from the corrected correction temperature can be obtained with higher accuracy.

Next, the temperature measurement determination processing unit 10a executes the first correction process (step # 7 to step # 18). In the first correction step, the average value SPa of the reference temperature SP is initialized, and if there are the maximum value PVmax, minimum value PVmin, and average value PVa of the measured temperature PV, these values are also initialized (step # 7). Then, temperature measurement processing is performed by the temperature sensor 3 and the reference temperature sensor 4 within the sampling time (step # 8 to step # 10). Here, the sampling time is the product of the sampling period (every X seconds) and the number of sampling times (Na).
In the temperature measurement process, the measured temperature PV of the temperature sensor 3 is acquired Na times (for example, 100 times) at a sampling period of every X seconds (for example, every 0.02 seconds), and is corrected to the acquired measured temperature PV. The average value PVa of the correction temperature is calculated by adding the value BA (step # 8), and the measured temperature PV of the temperature sensor 3 is acquired Na times (for example, 100 times) at a sampling period of X seconds. Then, the correction value BA is added to the acquired measured temperature PV to acquire the maximum value PVmax and the minimum value PVmin (step # 9). Here, the correction value BA added to the measured temperature PV is 0, which is the value input from the input unit 13 in step # 1. Furthermore, the reference temperature SP of the reference temperature sensor 4 is acquired Na times (for example, 100 times) at a sampling period of every X seconds (for example, every 0.02 seconds), and the average value SPa of the acquired reference temperatures SP is acquired. Is calculated (step # 10).
Then, it is determined whether or not the maximum value PVmax and the minimum value PVmin are within the average value PVa ± Tx (step # 11), and if not within the average value PVa ± Tx (step # 11: No), the average value PVa ± When it is not counted five times within Tx, the process returns to step # 7 (step # 12: No), and when counted five times (step # 12: Yes), an alarm is displayed on the display unit 12 (step # 12). # 13). Thereby, the reliability of the average value PVa can be improved, and when the reliability of the average value PVa is low, an alarm can be displayed to notify the operator or the like.
When the maximum value PVmax and the minimum value PVmin are within the average value PVa ± Tx in step # 11 (step # 11: Yes), the average value SPa of the reference temperature SP and the measured temperature PV (correction) are performed as the first discrimination process. The temperature difference BAx from the average temperature PVa is calculated (step # 14), and it is determined whether or not the temperature difference BAx is within the first allowable range ± Ta (step # 15). If the temperature difference BAx is not within the first allowable range ± Ta (step # 15: No), the temperature difference BAx is added to the correction value BA (BA = 0 in the first discrimination process), and the correction value BA is updated to the updated correction value BA (step # 16), and the process returns to step # 7. Then, with this updated correction value BA, in the second and subsequent determination processing, the correction value BA is repeatedly updated until the temperature difference BAx falls within the first allowable range ± Ta (steps # 7 to # 16). ). Thereby, in the first correction step, the updated correction value BA can be obtained so that the measured temperature PV is within the first allowable range ± Ta with respect to the reference temperature SP. If the temperature difference BAx is not counted three times other than the first allowable range ± Ta simultaneously with the update of the correction value BA in step # 16 (step # 17: No), the process returns to step # 16. When it is counted three times (step # 17: Yes), an alarm is displayed on the display unit 12 (step # 18). As a result, when the value of the temperature difference BAx does not fall within the range of the first allowable range ± Ta, an alarm can be displayed and notified, and the average value SPa of the reference temperature SP, the measured temperature PV, and correction to this can be made. It is possible to estimate that the correction temperature obtained by adding the value BA, the correction value BA (BA = 0 in this example), and the like may not be appropriate.
On the other hand, when the temperature difference BAx is within the first allowable range ± Ta (step # 15: Yes), the process proceeds to the second correction step.

  Next, as shown in FIG. 6, the temperature measurement determination processing unit 10a executes the second correction process (step # 21 to step # 33). In this second correction step, the same correction as in the first correction step is performed, but the sampling frequency of the measurement temperature PV and the reference temperature SP in the temperature measurement process (every X seconds) is kept as it is, and the number of samplings is Na times (for example, 100 times). In that the sampling time in the second correction step is longer than the sampling time in the first correction step. Further, in the second correction step, the correction value BA when correcting the measured temperature PV acquired within the sampling time is the correction value BA when the temperature difference BAx falls within the first allowable range ± Ta in the first correction step. The point which uses is also different from the first correction step. Furthermore, the second tolerance range ± Tb, which is narrower than the first tolerance range ± Ta used in the first correction step, is different in that it is used in the second correction step. Accordingly, in the second correction step, the measured temperature PV is set to the first allowable range with respect to the reference temperature SP on the assumption that the measured temperature PV is within the first allowable range ± Ta with respect to the reference temperature SP. The correction value BA can be obtained with high accuracy so that the second allowable range ± Tb is narrower than ± Ta. Hereinafter, the second correction process will be described.

In the second correction step, the average value SPa of the reference temperature SP, the maximum value PVmax of the measured temperature PV, the minimum value PVmin, and the average value PVa are initialized (step # 21). Then, temperature measurement processing is performed by the temperature sensor 3 and the reference temperature sensor 4 within the sampling time (step # 22 to step # 24). Here, the sampling time is the product of the sampling period (every X seconds) and the number of sampling times (Nb).
In the temperature measurement process, the measured temperature PV of the temperature sensor 3 is acquired Nb times (for example, 250 times) at a sampling period of every X seconds (for example, every 0.02 seconds), and is corrected to the acquired measured temperature PV. The value BA (correction value BA when the temperature difference BAx is within the first allowable range ± Ta in the first correction step) is added to calculate the average value PVa (step # 22), and sampling every X seconds The measurement temperature PV of the temperature sensor 3 is acquired Nb times in a cycle, and the acquired measurement temperature PV is corrected to the correction value BA (correction when the temperature difference BAx is within the first allowable range ± Ta in the first correction step). Value BA) is added to obtain maximum value PVmax and minimum value PVmin (step # 23). Further, the reference temperature SP of the reference temperature sensor 4 is acquired Nb times (for example, 250 times) at a sampling period of every X seconds (for example, every 0.02 seconds), and the average value SPa of the acquired reference temperatures SP is acquired. Is calculated (step # 24).
Then, it is determined whether or not the maximum value PVmax and the minimum value PVmin are within the average value PVa ± Tx (step # 25). If not within the average value PVa ± Tx (step # 25: No), the average value PVa ± When it is not counted five times within Tx, the process returns to step # 21 (step # 26: No), and when counted five times (step # 26: Yes), an alarm is displayed on the display unit 12 (step # 26). # 27). Thereby, the reliability of the average value PVa can be improved, and when the reliability of the average value PVa is low, an alarm can be displayed to notify the operator or the like.
When the maximum value PVmax and the minimum value PVmin are within the average value PVa ± Tx in step # 25 (step # 25: Yes), the average value SPa of the reference temperature SP and the measured temperature PV (correction) are performed as the first discrimination process. The temperature difference BAx from the average temperature PVa is calculated (step # 28), and it is determined whether or not the temperature difference BAx is within the second allowable range ± Tb (step # 29). The second allowable range ± Tb is set to a range narrower than the first allowable range ± Ta. If the temperature difference BAx is not within the second allowable range ± Tb (step # 29: No), the correction value BA (in the first determination process, the correction value BA is the first allowable value in the first correction step). The temperature difference BAx is added to the correction value BA in the case of being within the range ± Ta, the correction value BA is updated to the updated correction value BA (step # 30), and the process returns to step # 21. With this updated correction value BA, in the second and subsequent determination processes, the correction value BA is repeatedly updated until the temperature difference BAx falls within the second allowable range ± Tb (steps # 21 to # 30). Thus, in the second correction step, the updated correction value BA can be obtained with higher accuracy so that the measured temperature PV is within the second allowable range ± Tb with respect to the reference temperature SP. At the same time as the correction value BA is updated, if it is not counted that the temperature difference BAx is outside the second allowable range ± Tb three times (step # 31: No), the process returns to step # 30 and counted three times. If so (step # 31: Yes), an alarm is displayed on the display unit 12 (step # 32). Thereby, when the value of the temperature difference BAx does not fall within the range of the second allowable range ± Tb, an alarm can be displayed and notified, and the average value SPa of the reference temperature SP, the measured temperature PV and the correction to this can be made. It is possible to estimate that the correction temperature obtained by adding the value BA, the correction value BA, and the like may not be appropriate.
On the other hand, when the temperature difference BAx is within the second allowable range ± Tb (step # 29: Yes), the average value SPa of the reference temperature SP, the maximum value PVmax of the measured temperature PV, the minimum value PVmin, and the average value PVa are calculated. Initialization (step # 33), the fan 5 is stopped, and the automatic correction is terminated.

  Then, the calibration correction value calculation unit 10b calculates the correction value BA when the temperature measurement determination processing unit 10a determines that the temperature difference BAx is within the second allowable range ± Tb, and the measurement temperature PV as the reference temperature SP. Obtained as a calibration correction value for correction. The calibration correction value obtained in this way is added to the measured temperature PV of the temperature sensor 3 for correction, thereby correcting the measured temperature PV of the temperature sensor 3 with respect to the reference temperature SP of the reference temperature sensor 4. It can be within the allowable range ± Tb, and high-precision correction can be realized. For example, the first allowable range ± Ta is ± 0.050 ° C., the second allowable temperature ± Tb is ± 0.025 ° C., or the first allowable range ± Ta is ± 0.025 ° C., and the second allowable temperature ± Tb is ±±. By setting the temperature to 0.010 ° C., the correction can be performed with higher accuracy as the process proceeds from the first correction process to the second correction process.

[Example]
Here, the measured temperature PV of the plurality of temperature sensors 3 was corrected using the temperature calibration device 50 of the present application. The result is shown in FIG. 7A as a representative of the temperature sensor 3 having the maximum value of the measured temperature PV and the temperature sensor 3 having the minimum value. FIG. 7A is a graph showing the relationship between the corrected temperature and the elapsed time when the temperature sensor measurement temperature is corrected using the temperature calibration device 50 according to the present application.
As can be seen from FIG. 7A, the measured temperature PV of the plurality of temperature sensors 3 has a minimum value of about 22.95 ° C. and a maximum value of about 23.05 ° C. It is about 0.1 ° C.

[Comparative example]
On the other hand, a plurality of rod-shaped temperature sensors described in the Background Art section are arranged in a bundle in a state where they are closely packed in parallel, and the reference temperature sensors are arranged in parallel in a state slightly separated from the bundle of temperature sensors. The measured temperature PV of a plurality of temperature sensors was corrected using a temperature calibration device employing a temperature sensor arrangement structure. The result is shown in FIG. 7B as a representative of the temperature sensor having the maximum value of the measured temperature PV and the temperature sensor 3 having the minimum value. FIG. 7B is a graph showing the relationship between the corrected temperature and the elapsed time when the measured temperature of the temperature sensor is corrected using a conventional temperature calibration device in which the temperature sensors are arranged in a bundle. It is.
As can be seen from FIG. 7B, the measured temperature PV of the plurality of temperature sensors has a minimum value of about 22.90 ° C. and a maximum value of about 23.08 ° C. It is about 0.18 ° C.

  Therefore, the maximum width (about 0.1 ° C.) using the temperature calibration device 50 of the present application is about 0.08 ° C. (45) compared to the maximum width (about 0.18 ° C.) using the conventional temperature calibration device. %) Is improving. Since the two differ in the target space for distribution measurement and the device configuration, it is difficult to consider that all of the above improvement in the maximum width is due to the difference in the temperature calibration device. Even if it is estimated that it contributes to 50%, if the temperature calibration device 50 according to the present application is used, an improvement of about 23% can be expected as compared with the case where the conventional temperature calibration device is used.

<Another embodiment>
(1) In the above embodiment, when correcting the measured temperature PV of the temperature sensor 3 with the reference temperature SP using the temperature calibration device 50, the measured temperature PV of the temperature sensor 3 is repeatedly performed by repeatedly performing the temperature measurement process and the discrimination process. The correction value BA is updated so that the temperature difference BAx between the correction temperature obtained by adding the correction value BA to the reference temperature SP and the reference temperature SP of the reference temperature sensor 4 falls within a predetermined allowable range. If it is the temperature calibration method of 3, it can employ | adopt without a restriction | limiting in particular. For example, the measurement temperature of the temperature sensor can be corrected using the temperature calibration device 50 by a known temperature sensor temperature calibration method.

(2) In the above embodiment, the temperature calibration method is used to execute the first correction process and the second correction process using the temperature calibration device 50. However, the first correction process is performed according to the accuracy required for the temperature sensor. In addition to the first correction process, the second correction process, the third correction process, or the third correction process, the correction process may be added and executed in stages.
For example, when performing a 1st correction process, a 2nd correction process, and a 3rd correction process, in addition to the said 1st correction process and a 2nd correction process, the temperature measurement determination process part 10a performs a 3rd correction process. . In this third correction step, the same correction as in the second correction step is performed, but the sampling frequency of the measurement temperature PV and the reference temperature PV (every X seconds) in the temperature measurement process is kept as it is, and the number of samplings is Nb times (for example, 250). In this embodiment, the sampling time in the third correction process is set longer than the sampling time in the second correction process. Further, in the third correction step, the correction value BA when correcting the measured temperature PV acquired within the sampling time is the correction value BA when the temperature difference BAx falls within the second allowable range ± Tb in the second correction step. The point which uses is also different from the second correction step. Furthermore, it is different in that the third tolerance range, which is narrower than the second tolerance range used in the second correction step, is used in the third correction step. Accordingly, in the third correction step, the measured temperature PV is set to the second allowable range with respect to the reference temperature SP on the assumption that the measured temperature PV is within the second allowable range ± Tb with respect to the reference temperature SP. The correction value BA can be obtained with high accuracy so that the third allowable range ± Tc in a range narrower than ± Tb is obtained.

(3) In the above embodiment, the fan 5 is provided on the other end 1 b side of the main body cylindrical portion 1. However, when the influence of heat generated by the fan 5 is small, the fan 5 is provided on the one end side 1 a of the main body cylindrical portion 1. You can also. Further, the fan 5 may be provided on the side part 2 b in the main body base part 2.

(4) In the above embodiment, the reference temperature sensor 4 is inserted into the reference temperature sensor insertion portion 7a of the reference temperature sensor arrangement stay 7b, and the entire reference temperature sensor 4 is arranged in the main body cylindrical portion 1. Although the configuration is adopted, as long as the temperature detection unit 4 a of the reference temperature sensor 4 is inserted in the main body cylindrical portion 1, the entire reference temperature sensor 4 may not be configured in the main body cylindrical portion 1. . For example, a reference temperature sensor arrangement stay is provided in the upper part of the main body cylindrical portion 1, a reference temperature sensor is inserted into the reference temperature sensor insertion portion of the reference temperature sensor arrangement stay, and the temperature detection portion of the reference temperature sensor is arranged in the main body cylindrical portion. You may comprise.

  INDUSTRIAL APPLICABILITY The present invention is useful as a technique that can correct a measurement temperature of a temperature sensor with a reference temperature of a reference temperature sensor with high accuracy with a simpler configuration and can reduce manufacturing costs and operation costs. Is available.

1 Body cylinder (support)
DESCRIPTION OF SYMBOLS 1a One end of main body cylindrical part 1b Other end of main body cylindrical part 2 Main body base part 2a Upper part of main body base part 2b Side part of main body base part 3 Temperature sensor 4 Reference temperature sensor 5 Fan 50 Temperature calibration apparatus A Air X Axis

Claims (6)

An arrangement structure of a temperature sensor including a support for supporting the temperature sensor,
The supporting body includes a cylindrical main body cylindrical portion formed to allow air to flow therein, and a plurality of the temperature sensors formed in a rod shape extend from the radially outer side of the main body cylindrical portion in the axial direction. And arranged radially in a state of being inserted into the main body cylindrical portion,
An arrangement structure of a temperature sensor comprising a fan that allows air to flow from one end to the other end of the main body cylindrical portion and supplies the air to the radially arranged temperature sensors.   The temperature sensor arrangement structure according to claim 1, wherein a reference temperature sensor formed in a rod shape is arranged on the axis parallel to the axis of the main body cylindrical portion.   The arrangement of the temperature sensor according to claim 2, wherein the fan is provided on the other end side of the main body cylindrical portion, and the reference temperature sensor and the temperature sensor are arranged on the upstream side in the air flow direction of the fan. Construction.   A main body pedestal portion supporting the main body cylindrical portion is provided at a lower portion of the main body cylindrical portion, and air exhausted from the other end side of the main body cylindrical portion by the fan is introduced from the upper portion of the main body pedestal portion so that the inside The temperature sensor arrangement structure according to any one of claims 1 to 3, wherein the temperature sensor is configured to flow through and be discharged from a side portion of the main body pedestal portion. A temperature calibration device including temperature correction means for correcting a measurement temperature of a temperature sensor that measures a temperature in a temperature adjustment target space with a reference temperature measured by a reference temperature sensor,
A temperature sensor arrangement structure according to any one of claims 1 to 4, wherein the temperature sensor and the reference temperature sensor are arranged in the temperature sensor arrangement structure,
The temperature correction means drives the fan to measure the measured temperature of the temperature sensor and the reference temperature of the reference temperature sensor, and corrects the measured temperature of the temperature sensor with the reference temperature of the reference temperature sensor. Configured temperature calibration device. A temperature calibration method for correcting the measured temperature of the temperature sensor with the reference temperature using the temperature calibration device according to claim 5,
A temperature measurement process is performed by the temperature sensor and the reference temperature sensor within a sampling time, and a correction temperature obtained by correcting the measurement temperature of the temperature sensor in the temperature measurement process with a correction value and the reference temperature sensor in the temperature measurement process A temperature difference from the reference temperature is determined, and a determination process is performed to determine whether the determined temperature difference is within an allowable range. If the temperature difference is outside the allowable range, the temperature difference is within the allowable range. In the configuration to repeatedly execute the temperature measurement process and the determination process until it is within,
The allowable range is set to a first allowable range, and the correction value for the correction value is set to zero in the first determination process, and the temperature difference in the previous determination process is determined to be the previous determination process in the second and subsequent determination processes. Performing the first correction step using the updated correction value updated by adding to the correction value in
When the temperature difference falls within the first allowable range, the allowable range is set to a second allowable range that is set narrower than the first allowable range, and the correction value is determined in the first determination process. Using the correction value when the temperature difference falls within the first allowable range in the first correction step, the temperature difference in the previous determination process is changed to the correction value in the previous determination process in the second and subsequent determination processes. Executing the second correction step using the updated correction value added and updated;
A correction value obtained when the temperature difference is determined to be within the second allowable range in the second correction step is obtained as a correction value for calibration when the measured temperature is corrected with the reference temperature, and the measured temperature A temperature calibration method for correcting the measured temperature by adding the calibration correction value to the calibration value.

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