Mass production calibration device and calibration method for temperature and humidity sensors

Abstract

The present invention relates to a mass production calibration device and calibration method for temperature and humidity sensors. It includes a calibration environment unit group, a device test carrier and a calibration test main controller; for any temperature and humidity sensor, according to the corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor in all calibration environments, the calibration test main controller performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, so as to obtain the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor, determine the calibration equation corresponding to the calibration type of the temperature and humidity sensor according to the obtained calibration coefficient, and use the obtained calibration equation to calibrate the humidity value measured by the temperature and humidity sensor and then output it. The present invention can effectively realize the calibration of the temperature and humidity sensor, improve the calibration efficiency and calibration accuracy, reduce the calibration cost, and is safe and reliable.

Description

Technical Field

[0001] The invention relates to a calibration device and a calibration method, in particular to a mass production calibration device and a calibration method for temperature and humidity sensors. Background Art

[0002] Temperature and humidity sensors are currently widely used in many fields such as industry, agriculture, medicine, home appliances, meteorology, etc., especially with the rise of the Internet of Things and smart home industries, the demand for temperature and humidity sensors is also increasing year by year. Relative humidity is a multivariate indicator, which is closely related to the temperature of the measured environment. Therefore, it is difficult to accurately measure relative humidity.

[0003] Temperature and humidity sensors need to be calibrated and tested before leaving the factory. The main purpose of calibration is to linearize product output and compensate for the impact of temperature on humidity. The calibration and testing costs of temperature and humidity sensors account for a large proportion of the device price. This is mainly because when testing and calibrating temperature and humidity sensors, a stable and accurate temperature and humidity environment needs to be provided, which leads to low efficiency and difficulty in the calibration process, and calibration is difficult to meet actual needs. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a temperature and humidity sensor mass production calibration device and calibration method, which can effectively calibrate the temperature and humidity sensor, improve the calibration efficiency and calibration accuracy, reduce the calibration cost, and be safe and reliable.

[0005] According to the technical solution provided by the present invention, the mass production calibration device of the temperature and humidity sensor includes a calibration environment unit group for providing the required calibration test environment, a device test carrier for transporting one or more temperature and humidity sensors to the required position, and a calibration test main controller for data processing and calibration coefficient calculation;

[0006] Providing a plurality of calibration environments adapted to the calibration type of the temperature and humidity sensor through the calibration environment unit group, wherein the calibration environment includes a calibration temperature environment value and a calibration humidity environment value in the same environment as the calibration temperature environment value; placing the temperature and humidity sensor to be calibrated in the corresponding calibration environment through the device test carrier, and collecting the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor in the calibration environment;

[0007] For any temperature and humidity sensor, the corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor in the calibration environment are obtained. After the calibration test main controller performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor and then output it.

[0008] The calibration environment unit group includes a plurality of calibration environment unit bodies, each of which includes an environment unit cavity in which a device test carrier that allows a plurality of temperature and humidity sensors to be carried is embedded, a temperature control unit adapted to the environment unit cavity, and a humidity control unit adapted to the environment unit cavity. Through the humidity control unit and the temperature control unit, the environment unit cavity of the calibration environment unit body can provide a required calibration temperature environment value and calibration humidity environment value.

[0009] The temperature control unit and the humidity control unit in the calibration environment unit are connected to an industrial computer, and the industrial computer is electrically connected to the calibration test main controller.

[0010] It also includes a sorting and packaging mechanism;

[0011] For any temperature and humidity sensor, after obtaining the calibration equation adapted to the temperature and humidity sensor, determine the accuracy of the calibrated humidity value output by the temperature and humidity sensor under calibration by the calibration equation, and determine the measurement quality of the temperature and humidity sensor based on the determined accuracy of the temperature and humidity sensor. Based on the current measurement quality of the temperature and humidity sensor, use a sorting and packaging mechanism to sort the temperature and humidity sensor to the desired position.

[0012] The calibration equation of a temperature and humidity sensor is: Z′=a0+a1x+a2y+a3x 2 +a4xy+a5y 2 , where Z′ is the humidity value after calibration of the temperature and humidity sensor, x is the humidity value of the environment where the temperature and humidity sensor is measuring, y is the temperature value of the environment where the temperature and humidity sensor is measuring, and a0, a1, a2, a3, a4, and a5 are the corresponding calibration coefficients;

[0013] During calibration, the calibration environment provided by the calibration environment unit group includes at least the calibration temperature environment value T1 and the calibration humidity environment value H1 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H1 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H1 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H2 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H2 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H2 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H3 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H3 under the calibration temperature environment value T2, and the calibration temperature environment value T3 and the calibration humidity environment value H3 under the calibration temperature environment value T3;

[0014] The corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor in the calibration environment are obtained, and the calibration test main controller constructs a calibration coefficient equation according to all the calibration measurement temperature values ​​and calibration measurement humidity values.

[0015]

[0016] Where N is 3, x i,j is the calibrated measured humidity value obtained by measuring by the temperature and humidity sensor in the calibration environment of the calibrated temperature environment value Ti and the calibrated humidity environment value Hj under the calibrated environment temperature value Ti, i,j is the calibration measurement temperature value obtained by measuring by the temperature and humidity sensor in the calibration environment of the calibration temperature environment value Ti and the calibration humidity environment value Hj under the calibration environment temperature value Ti, i,j is the expected measured humidity value obtained by measuring by the temperature and humidity sensor in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj under the calibration environment temperature value Ti, i is 1, 2 or 3, and j is 1, 2 or 3;

[0017] According to the calibration coefficient equation constructed above, calibration coefficient a0, calibration coefficient a1, calibration coefficient a2, calibration coefficient a3, calibration coefficient a4 and calibration coefficient a5 can be determined to determine the calibration equation of the temperature and humidity sensor.

[0018] A mass production calibration method for a temperature and humidity sensor, providing a temperature and humidity sensor to be calibrated and determining a calibration type of the temperature and humidity sensor;

[0019] According to the calibration type of the temperature and humidity sensor, a plurality of calibration environments adapted to the calibration type of the temperature and humidity sensor are provided through a calibration environment unit group, wherein the calibration environment includes a calibration temperature environment value and a calibration humidity environment value located in the same environment as the calibration temperature environment value; the temperature and humidity sensor to be calibrated is placed in the corresponding calibration environment through a device test carrier, and a calibration measurement temperature value and a calibration measurement humidity value of the temperature and humidity sensor in the calibration environment are collected;

[0020] For any temperature and humidity sensor, the corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor in the calibration environment are obtained. After the calibration test main controller performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor and then output it.

[0021] The calibration environment unit group includes a plurality of calibration environment unit bodies, each of which includes an environment unit cavity that allows a device test tray carrier temperature and humidity sensor to be embedded, a temperature control unit adapted to the environment unit cavity, and a humidity control unit adapted to the environment unit cavity. The humidity control unit and the temperature control unit can enable the environment unit cavity of the calibration environment unit body to provide a required calibration temperature environment value and a calibration humidity environment value.

[0022] The temperature control unit and the humidity control unit in the calibration environment unit are connected to an industrial computer, and the industrial computer is electrically connected to the calibration test main controller.

[0023] It also includes a sorting and packaging mechanism;

[0024] For any temperature and humidity sensor, after obtaining the calibration equation adapted to the temperature and humidity sensor, determine the accuracy of the calibrated humidity value output by the temperature and humidity sensor under calibration by the calibration equation, and determine the measurement quality of the temperature and humidity sensor based on the determined accuracy of the temperature and humidity sensor. Based on the current measurement quality of the temperature and humidity sensor, use a sorting and packaging mechanism to sort the temperature and humidity sensor to the desired position.

[0025] The calibration equation of a temperature and humidity sensor is: Z′=a0+a1x+a2y+a3x 2 +a4xy+a5y 2 , where Z′ is the humidity value after calibration of the temperature and humidity sensor, x is the humidity value of the environment where the temperature and humidity sensor is measuring, y is the temperature value of the environment where the temperature and humidity sensor is measuring, and a0, a1, a2, a3, a4, and a5 are the corresponding calibration coefficients;

[0026] During calibration, the calibration environment provided by the calibration environment unit group includes at least the calibration temperature environment value T1 and the calibration humidity environment value H1 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H1 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H1 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H2 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H2 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H2 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H3 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H3 under the calibration temperature environment value T2, and the calibration temperature environment value T3 and the calibration humidity environment value H3 under the calibration temperature environment value T3;

[0027] The corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor in the calibration environment are obtained, and the calibration test main controller constructs a calibration coefficient equation according to all the calibration measurement temperature values ​​and calibration measurement humidity values.

[0028]

[0029] Where N is 3, x i,j is the calibrated measured humidity value obtained by measuring by the temperature and humidity sensor in the calibration environment of the calibrated temperature environment value Ti and the calibrated humidity environment value Hj under the calibrated environment temperature value Ti, i,j is the calibration measurement temperature value obtained by measuring by the temperature and humidity sensor in the calibration environment of the calibration temperature environment value Ti and the calibration humidity environment value Hj under the calibration environment temperature value Ti, i,j is the expected measured humidity value obtained by measuring by the temperature and humidity sensor in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj under the calibration environment temperature value Ti, i is 1, 2 or 3, and j is 1, 2 or 3;

[0030] According to the calibration coefficient equation constructed above, calibration coefficient a0, calibration coefficient a1, calibration coefficient a2, calibration coefficient a3, calibration coefficient a4 and calibration coefficient a5 can be determined to determine the calibration equation of the temperature and humidity sensor.

[0031] The advantages of the present invention are as follows: the calibration environment unit group is used to provide a number of different calibration environments, and the device test carrier can be used to carry one or more temperature and humidity sensors in different calibration environments. When a plurality of temperature and humidity sensors are carried at the same time, the plurality of temperature and humidity sensors can be calibrated simultaneously.

[0032] After the calibration test main controller performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor and then output, which can effectively realize the calibration of the temperature and humidity sensor, improve the calibration efficiency and calibration accuracy, reduce the calibration cost, and be safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a system block diagram of the present invention.

[0034] Explanation of the accompanying drawings: 1-calibration test auxiliary controller, 2-temperature and humidity sensor, 3-calibration test main controller, 4-device test carrier, 5-calibration environment first unit, 6-sorting and packaging mechanism, 7-humidity control unit, 8-temperature control unit, 9-industrial computer, 10-calibration environment second unit and 11-calibration environment third unit. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0036] like Figure 1 As shown: In order to effectively realize the calibration of the temperature and humidity sensor, improve the calibration efficiency and calibration accuracy, and reduce the calibration cost, the present invention includes a calibration environment unit group for providing the required calibration test environment, a device test carrier 4 for transporting one or more temperature and humidity sensors 2 to the required position, and a calibration test main controller 3 for data processing and calibration coefficient calculation;

[0037] A plurality of calibration environments adapted to the calibration type of the temperature and humidity sensor 2 are provided through the calibration environment unit group, wherein the calibration environment includes a calibration temperature environment value and a calibration humidity environment value in the same environment as the calibration temperature environment value; the temperature and humidity sensor 2 to be calibrated is placed in the corresponding calibration environment through the device test carrier 4, and the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment are collected;

[0038] For any temperature and humidity sensor 2, the corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment are obtained. After the calibration test main controller 3 performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor 2 can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor 2 is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor 2 and then output it.

[0039] Specifically, the temperature and humidity sensor 2 can be of an existing commonly used type, which can be selected according to actual needs and is well known to those skilled in the art. When the type of the temperature and humidity sensor 2 is determined, the calibration type can be determined according to the type of the temperature and humidity sensor 2. After the calibration type is selected, the calibration point or calibration coefficient of the calibration type needs to be calculated and determined. The calibration test main controller 3 can adopt an existing commonly used form, such as a computer, etc., which can be selected according to needs.

[0040] The device test carrier 4 can be in the form of a mechanical arm and a suction cup, etc., and the device test carrier 4 can be used to carry one or more temperature and humidity sensors 2. In order to improve the efficiency of calibration, a device test carrier 4 is used to carry multiple temperature and humidity sensors 2 of the same type at the same time. The temperature and humidity sensor 2 can be connected and matched with the device test carrier 4 in the form of vacuum adsorption, etc. The type of the device test carrier 4 and the form of connection and matching between the temperature and humidity sensor 2 and the device test carrier 4 can be selected according to actual needs, so as to meet the actual calibration requirements, which is well known to those skilled in the art and will not be described here.

[0041] When calibrating the temperature and humidity sensor 2, a corresponding calibration environment needs to be provided. In the embodiment of the present invention, a calibration environment unit group is used to provide multiple different calibration environments, and the number of calibration environments is adapted to the calibration type of the temperature and humidity sensor 2 to meet the calculation of the calibration coefficient within the calibration type.

[0042] During calibration, the device test carrier 4 can be used to place the temperature and humidity sensor 2 connected to the device test carrier 4 in different calibration environments in turn. Since the calibration environment includes a calibration temperature environment value and a calibration humidity environment value in the same environment as the calibration temperature environment value, when the temperature and humidity sensor 2 is stabilized in the current calibration environment through the device test carrier 4, the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment can be collected. In specific implementation, the commonly used technical means in the technical field can be used to collect the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment, and the collected calibration measurement temperature value and the calibration measurement humidity value in a calibration environment need to be transmitted to the calibration test main controller 3.

[0043] During specific implementation, the working state of the device test carrier 4 can be controlled by the calibration test auxiliary controller 1, and the calibration test auxiliary controller 1 can adopt common control forms such as PLC (Programmable Logic Controller). The calibration test auxiliary controller 1 is electrically connected to the calibration test main controller 3. The calibration measurement temperature value and the calibration measurement humidity value of a temperature and humidity sensor 2 in the current calibration environment can be transmitted to the calibration test main controller 3 through the calibration test auxiliary controller 1; of course, other methods can also be used to realize the transmission of the calibration measurement temperature value and the calibration measurement humidity value to the calibration test main controller 3. The specific form can be selected according to needs and will not be repeated here.

[0044] After placing the temperature and humidity sensor 2 in all calibration environments in turn, the calibration test main controller 3 obtains the corresponding calibration measurement temperature value and calibration measurement humidity value in all calibration environments. After the calibration test main controller 3 performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor 2 can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor 2 is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor 2 and then output.

[0045] Furthermore, the calibration environment unit group includes a plurality of calibration environment unit bodies, and the calibration environment unit body includes an environment unit cavity that allows the device test carrier 4 to embed the carrier temperature and humidity sensor 2, a temperature control unit 8 adapted to the environment unit cavity, and a humidity control unit 7 adapted to the environment unit cavity. Through the humidity control unit 7 and the temperature control unit 8, the environment unit cavity of the calibration environment unit body can provide a required calibration temperature environment value and calibration humidity environment value.

[0046] In the embodiment of the present invention, the environmental unit cavity can adopt an existing form, and a calibration environment can be formed in the environmental unit cavity. The specific form of the environmental unit cavity is based on the requirement that the temperature and humidity sensor 2 carried by the device test carrier 4 can be stably placed in the required calibration environment, and will not be described in detail here. During specific implementation, the environmental unit cavity is stabilized in the required stable state by the temperature control unit 8, and the environmental unit cavity is stabilized in the required humidity state by the humidity control unit 7; the environmental unit cavity is related to the characteristics and calibration type of the temperature and humidity sensor 2. The temperature control unit 8 and the humidity control unit 7 can adopt existing commonly used forms, so as to meet the requirements of providing the required calibration temperature environment value and calibration humidity environment value for the environmental unit cavity, and will not be described in detail here.

[0047] In specific implementation, the temperature control unit 8 and humidity control unit 7 in the calibration environment unit are connected to an industrial computer 9, and the industrial computer 9 is electrically connected to the calibration test main controller 3. Generally, each calibration environment unit includes an industrial computer 9. Of course, the calibration environment units in all calibration environment unit groups can also share one industrial computer 9, which can be selected according to needs. After the industrial computer 9 is electrically connected to the calibration test main controller 3, the calibration test main controller 3 can set the calibration temperature environment value and the calibration humidity environment value of any environment unit cavity through the industrial computer 9, that is, the working state of the corresponding humidity control unit 7 and the temperature control unit 8 is controlled by the industrial computer 9.

[0048] The following is a calibration equation for a temperature and humidity sensor 2: Z′=a0+a1x+a2y+a3x 2 +a4xy+a5y 2 In the above calibration equation, Z' is the humidity value of the temperature and humidity sensor 2 after calibration, that is, the calibration humidity value, x is the humidity value of the environment where the temperature and humidity sensor 2 is measuring, and y is the temperature value of the environment where the temperature and humidity sensor 2 is measuring.

[0049] From the above calibration equation, it can be seen that a0, a1, a2, a3, a4, and a5 are corresponding calibration coefficients, that is, the values ​​obtained after the calibration test main controller 3 calculates and processes the corresponding calibration measurement temperature values ​​and calibration measurement humidity values ​​in all calibration environments. In order to adapt to the calibration type and calibration equation of the temperature and humidity sensor 2, Figure 1 A specific implementation of the calibration environment unit group is shown in FIG. Specifically, the calibration environment unit group includes a first calibration environment unit body 5, a second calibration environment unit body 10, and a third calibration environment unit body 11, wherein the calibration environment provided by the first calibration environment unit body 5 includes a temperature T1, the calibration environment provided by the second calibration environment unit body 10 includes a temperature T2, and the calibration environment provided by the third calibration environment unit body 11 includes a temperature T3. The specific conditions of the first calibration environment unit body 5, the second calibration environment unit body 10, and the third calibration environment unit body 11 can be referred to the above description, and will not be repeated here.

[0050] Specifically, during the first calibration collection, the first unit body 5 of the calibration environment, the second unit body 10 of the calibration environment, and the third unit body 11 of the calibration environment are at the same calibration humidity environment value H1, that is, at this time, the calibration environment provided by the first unit body 5 of the calibration environment is the calibration temperature environment value T1 and the calibration humidity environment value H1, the calibration environment provided by the second unit body 10 of the calibration environment is the calibration temperature environment value T2 and the calibration humidity environment value H1, and the calibration environment provided by the third unit body 11 of the calibration environment is the calibration temperature environment value T3 and the calibration humidity environment value H1.

[0051] During the second calibration collection, the first unit body 5 of the calibration environment, the second unit body 10 of the calibration environment and the third unit body 11 of the calibration environment are in the same calibration humidity environment value H2, that is, at this time, the calibration environment provided by the first unit body 5 of the calibration environment is the calibration temperature environment value T1 and the calibration humidity environment value H2, the calibration environment provided by the second unit body 10 of the calibration environment is the calibration temperature environment value T2 and the calibration humidity environment value H2, and the calibration environment provided by the third unit body 11 of the calibration environment is the calibration temperature environment value T3 and the calibration humidity environment value H2.

[0052] During the third calibration collection, the first unit body 5 of the calibration environment, the second unit body 10 of the calibration environment and the third unit body 11 of the calibration environment are at the same calibration humidity environment value H3, that is, at this time, the calibration environment provided by the first unit body 5 of the calibration environment is the calibration temperature environment value T1 and the calibration humidity environment value H3, the calibration environment provided by the second unit body 10 of the calibration environment is the calibration temperature environment value T2 and the calibration humidity environment value H3, and the calibration environment provided by the third unit body 11 of the calibration environment is the calibration temperature environment value T3 and the calibration humidity environment value H3.

[0053] For any temperature and humidity sensor 2, it is necessary to go through the above-mentioned first calibration acquisition, second calibration acquisition and third calibration acquisition. In the first calibration acquisition, the temperature and humidity sensor 2 needs to be placed in the first unit body 5 of the calibration environment, the second unit body 10 of the calibration environment and the third unit body 11 of the calibration environment in sequence, so as to calibrate the measured temperature value and the calibrated measured humidity value. The second calibration acquisition and the third calibration acquisition repeat the process of the first calibration acquisition, that is, the corresponding calibration temperature environment value and calibration humidity environment value are respectively acquired.

[0054] Therefore, after the above-mentioned collection, calibration and collection, for the temperature and humidity sensor 2, the corresponding calibration measurement temperature values ​​and calibration measurement humidity values ​​under the same calibration temperature environment value and three different calibration humidity environment values ​​can be obtained, and finally 9 calibration measurement temperature values ​​and 9 calibration measurement humidity values ​​can be obtained.

[0055] The 9 calibration measured humidity values ​​are shown in Table 1.

[0056] Table 1

[0057] Calibrate the measured humidity value H1 H2 H3 T1 *%RH *%RH *%RH T2 *%RH *%RH *%RH T3 *%RH *%RH *%RH

[0058] The 9 calibration measurement temperature values ​​are shown in Table 2.

[0059] Table 2

[0060] Calibrate the measured temperature value H1 H2 H3 T1 *℃ *℃ *℃ T2 *℃ *℃ *℃ T3 *℃ *℃ *℃

[0061] For the 9 calibrated measured temperature values, the 9 calibrated measured humidity values, and the expected measured humidity value of temperature sensor 2, the following equation can be constructed:

[0062]

[0063] In the above constructed equation, N is 3, x is the calibrated measured humidity value in Table 1, and y is the calibrated measured temperature value in Table 2, where x 11 is the calibrated measured humidity value corresponding to the calibrated temperature environment value T1 and the calibrated humidity environment value H1 in Table 1, x 12 is the calibrated measured humidity value corresponding to the calibrated temperature environment value T1 and the calibrated humidity environment value H2 in Table 1, x 13 It is the calibration measurement humidity value corresponding to the calibration temperature environment value T1 and the calibration humidity environment value H3 in Table 1, and the rest is by analogy, which will not be repeated here.

[0064] y 11 is the calibration measurement temperature value corresponding to the calibration temperature environment value T1 and the calibration humidity environment value H1 in Table 2, y 12 is the calibration measurement temperature value corresponding to the calibration temperature environment value T1 and the calibration humidity environment value H2 in Table 2, 13 The calibration measurement temperature value corresponding to the calibration temperature environment value T1 and the calibration humidity environment value H3 in Table 2, and the rest is by analogy, which will not be repeated here.

[0065] For Z 11 , is the expected measured humidity value of the temperature sensor 2 under the calibration temperature environment value T1 and the calibration humidity environment value H1. Generally, under the calibration humidity environment value H1, the expected measured humidity value of the temperature sensor 2 is the humidity H1. Similarly, for Z 12 , the expected measured humidity value of the temperature sensor 2 under the calibration temperature environment value T1 and the calibration humidity environment value H2. Specifically, under the calibration humidity environment value H2, the expected measured humidity value of the temperature sensor 2 is the humidity H2, and the rest is by analogy, which will not be repeated here.

[0066] Therefore, after obtaining 9 calibration measurement temperature values ​​and 9 calibration measurement humidity values, the corresponding values ​​of the calibration coefficients a0, a1, a2, a3, a4, and a5 can be determined according to the above equation. Of course, in specific implementation, other methods can be used to construct the required equations according to the 9 calibration measurement temperature values, the 9 calibration measurement humidity values, and the expected measurement humidity value of the temperature sensor 2, as long as the calibration coefficients a0, a1, a2, a3, a4, and a5 can be calculated, which will not be repeated here.

[0067] Furthermore, it also includes a sorting and packaging mechanism 6;

[0068] For any temperature and humidity sensor 2, after obtaining the calibration equation adapted to the temperature and humidity sensor 2, determine the accuracy of the calibrated humidity value output by the temperature and humidity sensor 2 under the calibration equation, and determine the measurement quality of the temperature and humidity sensor 2 based on the determined accuracy of the temperature and humidity sensor 2. Based on the current measurement quality of the temperature and humidity sensor 2, use the sorting and packaging mechanism 6 to sort the temperature and humidity sensor 2 to the required position.

[0069] In the embodiment of the present invention, the sorting and packaging mechanism 6 can adopt the existing commonly used form, which can be specifically selected according to the actual sorting needs, and will not be repeated here. For any temperature and humidity sensor 2, after obtaining the calibration equation of the temperature and humidity sensor 2, the accuracy of the calibrated humidity value output by the temperature and humidity sensor 2 under the calibration of the calibration equation can be determined. The specific method for determining the accuracy of the calibrated humidity value output by the temperature and humidity sensor 2 under the calibration of the calibration equation can be selected according to actual needs, such as using the temperature and humidity sensor 2 to measure the humidity value, and comparing the measured humidity measurement calibration value with the current environmental humidity value. Of course, other commonly used methods can also be used to determine the accuracy of the calibrated humidity value output by the temperature and humidity sensor 2 under the calibration of the calibration equation, which will not be listed here one by one.

[0070] Determine the accuracy of the temperature and humidity sensor 2 to determine the measurement quality of the temperature and humidity sensor 2. The measurement quality can generally be divided into qualified or unqualified. Of course, a more detailed division can also be made. The specific division can be selected according to actual needs, which will not be repeated here. According to the measurement quality of the current temperature and humidity sensor 2, the temperature and humidity sensor 2 is sorted to the required position using the sorting and packaging mechanism 6, such as sorting unqualified temperature and humidity sensors 2 to the defective area to prevent unqualified temperature and humidity sensors 2 from leaving the factory. The sorting and packaging mechanism 6 is generally controlled by the calibration test auxiliary controller 1. The specific working mode and working process can be determined according to actual needs, which will not be repeated here.

[0071] In summary, a mass production calibration method for temperature and humidity sensors can be obtained, specifically: providing a temperature and humidity sensor 2 to be calibrated and determining a calibration type of the temperature and humidity sensor 2;

[0072] According to the calibration type of the temperature and humidity sensor 2, a plurality of calibration environments adapted to the calibration type of the temperature and humidity sensor 2 are provided through a calibration environment unit group, wherein the calibration environment includes a calibration temperature environment value and a calibration humidity environment value located in the same environment as the calibration temperature environment value; the temperature and humidity sensor 2 to be calibrated is placed in the corresponding calibration environment through the device test carrier 4, and the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment are collected;

[0073] For any temperature and humidity sensor 2, the corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor 2 in the calibration environment are obtained. After the calibration test main controller 3 performs the required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values, the calibration coefficient corresponding to the calibration type of the temperature and humidity sensor 2 can be obtained. The calibration equation corresponding to the calibration type of the temperature and humidity sensor 2 is determined based on the obtained calibration coefficient. The obtained calibration equation can be used to calibrate the humidity value measured by the temperature and humidity sensor 2 and then output it.

[0074] In the embodiment of the present invention, the method and process of using the calibration test main controller 3, the device test carrier 4 and the calibration environment unit group to calibrate one or more temperature and humidity sensors 2 at the same time can refer to the above description and will not be repeated here.

Claims

1. A mass production calibration device for temperature and humidity sensors, characterized by: It comprises a calibration environment unit group for providing a required calibration test environment, a device test carrier (4) for transporting one or more temperature and humidity sensors (2) to a required position, and a calibration test main controller (3) for data processing and calibration coefficient calculation; Providing a plurality of calibration environments that are compatible with the calibration type of the temperature and humidity sensor (2) through a calibration environment unit group, the calibration environment comprising a calibration temperature environment value and a calibration humidity environment value in the same environment as the calibration temperature environment value; placing the temperature and humidity sensor (2) to be calibrated in the corresponding calibration environment through a device test carrier (4), and collecting the calibration measurement temperature value and the calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment; For any temperature and humidity sensor (2), a corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment are obtained, and the calibration test main controller (3) performs required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values ​​to obtain a calibration coefficient corresponding to the calibration type of the temperature and humidity sensor (2), and determines a calibration equation corresponding to the calibration type of the temperature and humidity sensor (2) based on the obtained calibration coefficient, and uses the obtained calibration equation to calibrate the humidity value measured by the temperature and humidity sensor (2) and output it; The calibration equation of a temperature and humidity sensor (2) is: Z′=a0+a1x+a2y+a3x 2 +a4xy+a5y 2 , wherein Z′ is the humidity value after calibration of the temperature and humidity sensor (2), x is the humidity value of the environment where the temperature and humidity sensor (2) measures, y is the temperature value of the environment where the temperature and humidity sensor (2) measures, and a0, a1, a2, a3, a4, and a5 are corresponding calibration coefficients; During calibration, the calibration environment provided by the calibration environment unit group includes at least the calibration temperature environment value T1 and the calibration humidity environment value H1 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H1 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H1 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H2 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H2 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H2 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H3 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H3 under the calibration temperature environment value T2, and the calibration temperature environment value T3 and the calibration humidity environment value H3 under the calibration temperature environment value T3; The corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment are obtained, and the calibration test main controller (3) constructs a calibration coefficient equation according to all the calibration measurement temperature values ​​and calibration measurement humidity values. Where N is 3, x i,j is the calibrated measured humidity value obtained by measuring by the temperature and humidity sensor (2) in a calibration environment of a calibrated temperature environment value Ti and a calibrated humidity environment value Hj at the calibrated environment temperature value Ti, i,j is the calibration measurement temperature value obtained by measuring by the temperature and humidity sensor (2) in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj at the calibration environment temperature value Ti, i,j is an expected measured humidity value measured by a temperature and humidity sensor (2) in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj at the calibration environment temperature value Ti, i is 1, 2 or 3, and j is 1, 2 or 3; According to the calibration coefficient equation constructed above, calibration coefficient a0, calibration coefficient a1, calibration coefficient a2, calibration coefficient a3, calibration coefficient a4 and calibration coefficient a5 can be determined, so as to determine the calibration equation of the temperature and humidity sensor (2).

2. The mass production calibration device for temperature and humidity sensors according to claim 1 is characterized in that: The calibration environment unit group comprises a plurality of calibration environment unit bodies, wherein the calibration environment unit bodies comprise an environment unit cavity in which a device test carrier (4) capable of carrying a plurality of temperature and humidity sensors (2) is embedded, a temperature control unit (8) adapted to the environment unit cavity, and a humidity control unit (7) adapted to the environment unit cavity. The humidity control unit (7) and the temperature control unit (8) enable the environment unit cavity of the calibration environment unit body to provide a required calibration temperature environment value and a calibration humidity environment value.

3. The mass production calibration device for temperature and humidity sensors according to claim 2 is characterized in that: The temperature control unit (8) and the humidity control unit (7) in the calibration environment unit are connected to an industrial computer (9), and the industrial computer (9) is electrically connected to the calibration test main controller (3).

4. The mass production calibration device for temperature and humidity sensors according to any one of claims 1 to 3, characterized in that: It also includes a sorting and packaging mechanism (6); For any temperature and humidity sensor (2), after obtaining a calibration equation that is compatible with the temperature and humidity sensor (2), the accuracy of the calibrated humidity value output by the temperature and humidity sensor (2) under calibration by the calibration equation is determined, and the measurement quality of the temperature and humidity sensor (2) is determined based on the determined accuracy of the temperature and humidity sensor (2). Based on the current measurement quality of the temperature and humidity sensor (2), the temperature and humidity sensor (2) is sorted to a desired position using a sorting and packaging mechanism (6).

5. A mass production calibration method for temperature and humidity sensors, characterized by: Providing a temperature and humidity sensor (2) to be calibrated and determining a calibration type of the temperature and humidity sensor (2); According to the calibration type of the temperature and humidity sensor (2), a plurality of calibration environments adapted to the calibration type of the temperature and humidity sensor (2) are provided through a calibration environment unit group, wherein the calibration environment includes a calibration temperature environment value and a calibration humidity environment value located in the same environment as the calibration temperature environment value; the temperature and humidity sensor (2) to be calibrated is placed in the corresponding calibration environment through a device test carrier (4), and a calibration measurement temperature value and a calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment are collected; For any temperature and humidity sensor (2), a corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment are obtained, and the calibration test main controller (3) performs required calculation processing on all the calibration measurement temperature values ​​and calibration measurement humidity values ​​to obtain a calibration coefficient corresponding to the calibration type of the temperature and humidity sensor (2), and determines a calibration equation corresponding to the calibration type of the temperature and humidity sensor (2) based on the obtained calibration coefficient, and uses the obtained calibration equation to calibrate the humidity value measured by the temperature and humidity sensor (2) and output it; The calibration equation of a temperature and humidity sensor (2) is: Z′=a0+a1x+a2y+a3x 2 +a4xy+a5y 2 , wherein Z′ is the humidity value after calibration of the temperature and humidity sensor (2), x is the humidity value of the environment where the temperature and humidity sensor (2) measures, y is the temperature value of the environment where the temperature and humidity sensor (2) measures, and a0, a1, a2, a3, a4, and a5 are corresponding calibration coefficients; During calibration, the calibration environment provided by the calibration environment unit group includes at least the calibration temperature environment value T1 and the calibration humidity environment value H1 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H1 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H1 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H2 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H2 under the calibration temperature environment value T2, the calibration temperature environment value T3 and the calibration humidity environment value H2 under the calibration temperature environment value T3, the calibration temperature environment value T1 and the calibration humidity environment value H3 under the calibration temperature environment value T1, the calibration temperature environment value T2 and the calibration humidity environment value H3 under the calibration temperature environment value T2, and the calibration temperature environment value T3 and the calibration humidity environment value H3 under the calibration temperature environment value T3; The corresponding calibration measurement temperature value and calibration measurement humidity value of the temperature and humidity sensor (2) in the calibration environment are obtained, and the calibration test main controller (3) constructs a calibration coefficient equation according to all the calibration measurement temperature values ​​and calibration measurement humidity values. Where N is 3, x i,j is the calibrated measured humidity value obtained by measuring by the temperature and humidity sensor (2) in a calibration environment of a calibrated temperature environment value Ti and a calibrated humidity environment value Hj at the calibrated environment temperature value Ti, i,j is the calibration measurement temperature value obtained by measuring by the temperature and humidity sensor (2) in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj at the calibration environment temperature value Ti, i,j is an expected measured humidity value measured by a temperature and humidity sensor (2) in a calibration environment of a calibration temperature environment value Ti and a calibration humidity environment value Hj at the calibration environment temperature value Ti, i is 1, 2 or 3, and j is 1, 2 or 3; According to the calibration coefficient equation constructed above, calibration coefficient a0, calibration coefficient a1, calibration coefficient a2, calibration coefficient a3, calibration coefficient a4 and calibration coefficient a5 can be determined, so as to determine the calibration equation of the temperature and humidity sensor (2).

6. The mass production calibration method of temperature and humidity sensors according to claim 5 is characterized in that: The calibration environment unit group comprises a plurality of calibration environment unit bodies, wherein the calibration environment unit bodies comprise an environment unit cavity for allowing a device test carrier (4) to be embedded with a carrier temperature and humidity sensor (2), a temperature control unit (8) adapted to the environment unit cavity, and a humidity control unit (7) adapted to the environment unit cavity. The humidity control unit (7) and the temperature control unit (8) enable the environment unit cavity of the calibration environment unit body to provide a required calibration temperature environment value and a calibration humidity environment value.

7. The mass production calibration method of temperature and humidity sensors according to claim 6 is characterized in that: The temperature control unit (8) and the humidity control unit (7) in the calibration environment unit are connected to an industrial computer (9), and the industrial computer (9) is electrically connected to the calibration test main controller (3).

8. The mass production calibration method of the temperature and humidity sensor according to any one of claims 5 to 7, characterized in that: It also includes a sorting and packaging mechanism (6); For any temperature and humidity sensor (2), after obtaining a calibration equation that is compatible with the temperature and humidity sensor (2), the accuracy of the calibrated humidity value output by the temperature and humidity sensor (2) under calibration by the calibration equation is determined, and the measurement quality of the temperature and humidity sensor (2) is determined based on the determined accuracy of the temperature and humidity sensor (2). Based on the current measurement quality of the temperature and humidity sensor (2), the temperature and humidity sensor (2) is sorted to a desired position using a sorting and packaging mechanism (6).

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