Constant temperature and humidity control method and control device for gauge block verification

Abstract

The invention discloses a constant-temperature and constant-humidity control method and device for gauge block verification, and belongs to the technical field of metering detection, and the control method comprises the steps: measuring the temperature T of a gauge block, judging whether the difference value between the temperature T of the gauge block and the standard temperature T0 meets the characteristic conditions or not, carrying out the constant-temperature time control, and carrying out the humidity control. The constant-temperature process of the gauge block can be controlled, and the problems that the evaporation speed of a cleaning agent left on the surface of the gauge block is low, and the drying time of the gauge block is long are solved. The temperature in the constant-temperature chamber is adjusted in real time according to the temperature of the gauge block through the auxiliary constant-temperature and constant-humidity mechanism, the situation that the temperature field in the gauge block is not uniform due to large temperature fluctuation in the constant-temperature process of the gauge block is avoided, and meanwhile the problem that the constant-temperature gauge block is not matched with the temperature of a measuring instrument can be solved.

Description

Technical Field

[0001] The present application relates to the field of measurement and detection technology, and in particular, to a constant temperature and humidity control method for gauge block calibration. In addition, the present application also relates to a control device applied to the constant temperature and humidity control method for gauge block calibration. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present application. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present application.

[0003] The calibration and application of gauge blocks are often involved in the field of metrology and testing technology. During calibration, gauge blocks usually need to go through the steps of cleaning, drying, constant temperature and comparative measurement. In recent years, with the continuous improvement of the requirements for geometric metrology calibration, the calibration of high-grade gauge blocks has higher requirements for the constant temperature of gauge blocks.

[0004] Before the gauge block is calibrated, its surface must be cleaned to remove oil and impurities that affect the calibration indication. However, after cleaning, there will be detergent residue on the surface of the gauge block, which needs to be placed in a constant temperature and dry environment to dry. Especially when using water-based detergents, the gauge block will take longer to dry. At the same time, the gauge block is made of steel and is affected by thermal expansion and contraction. The gauge block needs to be calibrated at a temperature as close to the standard temperature of 20°C as possible. For example, the expansion coefficient of steel is 11.5×10 -6 ℃ -1 For a 100 mm gauge block, its standard length will expand by 11.5×10 -6 ℃ -1 ×100mm×1℃=1.15μm. The JJG146 “Gauge Block” verification procedure requires that the gauge block length be measured by comparison. For three equal gauge blocks, the allowable deviation of the gauge block temperature from 20℃ during the comparison measurement is only 0.2℃.

[0005] In order to reduce the impact of thermal expansion on the measurement of the gauge block, the gauge block needs to be placed in a calibration room for a long time at a constant temperature before calibration.

[0006] However, we found the following problems in the actual process: due to environmental fluctuations, the temperature in the calibration room cannot be kept constant at 20°C for a long time, which will cause large fluctuations in the temperature inside the naturally constant temperature gauge block, bringing greater uncertainty to the subsequent gauge block measurement; due to the lack of accurate and efficient constant temperature method for gauge block calibration to control the constant temperature process of the gauge block, it is difficult to solve the problems of slow evaporation of cleaning agents remaining on the surface of the gauge block and long drying time of the gauge block; there is no effective temperature monitoring during the constant temperature process of the gauge block, and the temperature in the constant temperature room cannot be adjusted in real time according to the gauge block temperature; and the temperature of the gauge block does not match the measuring instrument after the constant temperature is reached.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] In view of at least one of the above technical problems, the present application provides a constant temperature and humidity control method for gauge block calibration, which greatly improves the accuracy of gauge block measurement temperature by comprehensively considering the length of the gauge block, the measurement correction value of the length, the linear expansion coefficient, etc., so that the constant temperature time is judged based on the actual measured temperature of the gauge block, so that the temperature of the gauge block is within the allowable value at the end of the constant temperature, avoiding the traditional method of only controlling the constant temperature time but not controlling the constant temperature effect; combined with the monitoring of the measured humidity and the target humidity of the gauge block, the specific time control of the constant temperature and humidity of the gauge block is realized, the constant temperature and humidity state of the gauge block is ensured, and the problem of large fluctuations in the natural constant temperature state of the gauge block and insufficient actual effective constant temperature time is solved.

[0009] The present application also provides a control device that applies the above-mentioned constant temperature and humidity control method for gauge block calibration.

[0010] According to one aspect of the present application, a constant temperature and humidity control method for gauge block calibration is provided, comprising the following steps:

[0011] S100, measuring the temperature T of the gauge block;

[0012] S200, determine whether the difference between the temperature T of the gauge block and the standard temperature T0 satisfies formula (1). If so, skip step S300 and proceed to step S400; if not, proceed to step S300:

[0013] l n ·α·(TT 0 )<40%·u c

[0014] Right now:

[0015] Where: l nis the length of the gauge block; α is the linear expansion coefficient of the gauge block, when the gauge block is a steel gauge block, α = 11.5 × 10-6 ° C-1; T is the temperature of the gauge block, in ° C; Τ 0 is the standard temperature, the value is 20℃; u c is the measurement uncertainty of the gauge block length;

[0016] S300, calculate the constant temperature control time of the gauge block:

[0017]

[0018] Where: t is the actual constant temperature time of the gauge block, in min;

[0019] S400, measure the humidity of the gauge block and control the humidity according to the following formula:

[0020]

[0021] Where: H is the measured humidity of the gauge block; H 0 is the target humidity of the gauge block; ΔH is the humidity window threshold, and the recommended value is the maximum allowable error of the humidity sensor.

[0022] In some embodiments of the present application, the uncertainty of the standard gauge block length measurement u in step S200 is c =0.05μm+0.5×10-6×l n , unit is μm.

[0023] In some embodiments of the present application, the actual measured temperature T of the equivalent block in step S300 is equal to the standard temperature T 0 When the difference satisfies formula (2), the constant temperature is continued at 40% of the uncertainty of the length measurement of the gauge block, and the constant temperature is continued after 10 minutes until the constant temperature effect reaches the actual measurement temperature T of the gauge block and the standard temperature T 0 When the difference does not satisfy formula (2), the constant temperature ends.

[0024] In some embodiments of the present application, the target humidity H of the gauge block in step S400 is 0 Determined according to the humidity of the constant temperature container, the recommended value is H 0 =ambient humidity+2ΔH.

[0025] According to another aspect of the present application, there is also provided a control device adopting the above-mentioned constant temperature and humidity control method for gauge block calibration, the control device comprising a constant temperature and humidity chamber, a controller, a temperature and humidity sensor and an auxiliary constant temperature and humidity mechanism, the constant temperature chamber being used to store gauge blocks, a drying component connected to the controller being arranged in the constant temperature chamber, the temperature and humidity sensor being arranged in the constant temperature chamber and connected to the controller, the temperature and humidity sensor being used to monitor the temperature and humidity of the gauge blocks and the internal environment of the constant temperature chamber and transmitting the data to the controller, the auxiliary constant temperature and humidity mechanism being connected to the controller and the constant temperature chamber, the auxiliary constant temperature and humidity mechanism being used to accept the control of the controller and deliver constant temperature and humidity air to the constant temperature chamber, the controller being used to control the opening and closing of the drying component and the auxiliary constant temperature and humidity mechanism according to formula (2) and formula (3).

[0026] In some embodiments of the present application, a lifting assembly is provided at the bottom of the constant temperature chamber, and the lifting assembly is used to drive the constant temperature chamber to move up and down.

[0027] In some embodiments of the present application, the lifting assembly includes a plurality of telescopic rods arranged in a row, the telescopic rods including an inner rod and an outer tube, a side wall of the outer tube is provided with a limiting screw hole, the limiting screw hole is used to set a limiting bolt and lock the inner rod and the outer tube by the limiting bolt, the inner rod is used to be connected to the bottom of the constant temperature room, and the inner rods of each telescopic rod are connected by a connecting rod.

[0028] In some embodiments of the present application, the drying component includes an adsorption dryer and an exhaust fan. The adsorption dryer is used to adsorb the humid air inside the constant temperature chamber. The exhaust fan is arranged at a preset exhaust hole on the side wall of the constant temperature chamber. The exhaust fan is used to exhaust the gas in the constant temperature chamber.

[0029] In some embodiments of the present application, the control device also includes a dust filter assembly, which includes a filter screen and a dust cover. The filter screen and the dust cover are arranged at the exhaust hole preset on the side wall of the constant temperature room and are located at the tail end of the exhaust end of the exhaust fan. The filter screen is used to prevent dust and impurities from entering the constant temperature room from the exhaust hole, and the dust cover is used to close or open the exhaust hole.

[0030] In some embodiments of the present application, the dust cover is hinged to the side wall of the constant temperature chamber, and the side wall of the dust cover is provided with a heat insulation board.

[0031] This application has the following beneficial effects:

[0032] The constant temperature and humidity control method for gauge block calibration of the present application can realize real-time temperature monitoring and constant temperature time control during the constant temperature process of the gauge block, realize the rapid evaporation of residual cleaning agent on the surface of the gauge block and the gauge block is always in a constant temperature and humidity state. The situation that the gauge block has large fluctuations in the natural constant temperature state and insufficient actual effective constant temperature time is solved. Among them, the accuracy of the gauge block measurement temperature is greatly improved by comprehensively considering the length of the gauge block, the measurement correction value of the length, the linear expansion coefficient, etc., so that the constant temperature time is judged according to the actual measured temperature of the gauge block, so that the temperature of the gauge block is within the allowable value at the end of the constant temperature, avoiding the traditional control of the constant temperature time but not the constant temperature effect; combined with the monitoring of the measured humidity of the gauge block and the target humidity, the specific time control of the constant temperature and humidity of the gauge block is realized, the constant temperature and humidity state of the gauge block is guaranteed, and the phenomenon of large fluctuations in the natural constant temperature state of the gauge block is avoided. The present application can meet the needs of rapid drying and constant temperature of the gauge block, and control and monitor the temperature and humidity state of the gauge block during the constant temperature process, so as to improve work efficiency, accuracy and effective protection.

[0033] The control device of the present application adopts the above-mentioned constant temperature and humidity control method for gauge block calibration, which is mainly used before the gauge block calibration and has the above-mentioned beneficial effects. At the same time, the control device of the present application can realize the control of the constant temperature process of the gauge block, and solve the problem of slow evaporation of the cleaning agent remaining on the surface of the gauge block and long drying time of the gauge block. The temperature and humidity of the gauge block during the constant temperature process are monitored in real time by the temperature and humidity sensor in the constant temperature chamber, and the temperature in the constant temperature chamber is adjusted in real time according to the gauge block temperature by the auxiliary constant temperature and humidity mechanism, so as to avoid large temperature fluctuations during the constant temperature process of the gauge block, resulting in uneven temperature field inside the gauge block, and at the same time, it can also solve the problem of mismatch between the gauge block and the measuring instrument temperature after the constant temperature.

[0034] Of course, any product implementing this application does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, this application also has other purposes, features and advantages. The following will further describe this application in detail with reference to the figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 This is a flow chart of constant temperature and humidity control of a gauge block according to a preferred embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of the overall structure of the control device of the preferred embodiment of the present application;

[0038] Legend: 100, constant temperature chamber; 101, lifting assembly; 102, drying assembly; 103, dust filter assembly; 200, controller; 300, temperature and humidity sensor; 400, auxiliary constant temperature and humidity mechanism. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0040] A constant temperature and humidity control method for gauge block calibration comprises the following steps:

[0041] S100, measuring the temperature T of the gauge block;

[0042] S200, determine whether the difference between the temperature T of the gauge block and the standard temperature T0 satisfies formula (1). If so, skip step S300 and proceed to step S400; if not, proceed to step S300:

[0043] l n ·α·(TT 0 )<40%·u c

[0044] Right now:

[0045] Where: l n is the length of the gauge block; α is the linear expansion coefficient of the gauge block, when the gauge block is a steel gauge block, α = 11.5 × 10-6 ° C-1; T is the temperature of the gauge block, in ° C; Τ 0 is the standard temperature, the value is 20℃; u c is the measurement uncertainty of the gauge block length;

[0046] S300, calculate the constant temperature control time of the gauge block:

[0047]

[0048] Where: t is the actual constant temperature time of the gauge block, in min;

[0049] S400, measure the humidity of the gauge block and control the humidity according to the following formula:

[0050]

[0051] Where: H is the measured humidity of the gauge block; H 0 is the target humidity of the gauge block; ΔH is the humidity window threshold, and the recommended value is the maximum allowable error of the humidity sensor.

[0052] In some embodiments, during the constant temperature process of the gauge block, the ambient humidity is 41% RH. Based on the accuracy of the sensor ±2% RH (MPE) and the environmental conditions, the target humidity of the gauge block is set to H 0 =45%RH, then the humidity window threshold is ΔH=2%RH. After cleaning, the gauge block is placed on the constant temperature platform of the constant temperature room 100. At this time, the initial humidity of the gauge block constant temperature platform is 85%RH>(H 0 +ΔH), at this time, the drying is turned on, such as turning on the drying component 102; after a period of drying, the platform humidity drops to 43% RH<(H 0 -ΔH), at this time, the drying is turned off.

[0053] The constant temperature and humidity control method for gauge block calibration in this application can realize real-time temperature monitoring and constant temperature time control during the constant temperature process of the gauge block, realize rapid evaporation of residual cleaning agent on the surface of the gauge block and the gauge block is always in a constant temperature and humidity state. The problem of large fluctuations in the natural constant temperature state of the gauge block and insufficient actual effective constant temperature time is solved. The accuracy of the gauge block measuring temperature is greatly improved by comprehensively considering the length of the gauge block, the measurement correction value of the length, the linear expansion coefficient, etc., so that the constant temperature time is judged according to the actual measured temperature of the gauge block, so that the temperature of the gauge block is within the allowable value at the end of the constant temperature, avoiding the traditional control of the constant temperature time without controlling the constant temperature effect; combined with the monitoring of the measured humidity of the gauge block and the target humidity, the specific time control of the constant temperature and humidity of the gauge block is realized, the constant temperature and humidity state of the gauge block is guaranteed, and the phenomenon of large fluctuations in the natural constant temperature state of the gauge block is avoided.

[0054] Preferably, the uncertainty of the standard gauge block length measurement u in step S200 is c =0.05μm+0.5×10-6×l n , unit is μm.

[0055] It is understandable that since the temperature and humidity of the gauge block are constantly changing, it will affect the length measurement of the gauge block. In order to improve the accuracy of the measurement parameters, considering the uncertainty of the gauge block length measurement, this parameter is introduced to correct the measurement and calculation results, which can further improve the accuracy of the final temperature control and ensure the accuracy of subsequent gauge block measurements.

[0056] Preferably, the actual measured temperature T of the equivalent block in step S300 is equal to the standard temperature T 0 When the difference satisfies formula (2), the constant temperature is continued at 40% of the uncertainty of the length measurement of the gauge block, and the constant temperature is continued after 10 minutes until the constant temperature effect reaches the actual measurement temperature T of the gauge block and the standard temperature T 0 When the difference does not satisfy formula (2), the constant temperature ends.

[0057] It can be understood that step S300 can determine the constant temperature time based on the actual measured temperature of the gauge block, so that the temperature of the gauge block is within the allowable value when the constant temperature ends, avoiding the traditional method of only controlling the constant temperature time but not the constant temperature effect, effectively ensuring the constant temperature effect, and solving the problem of large fluctuations in the gauge block under the natural constant temperature state and insufficient actual effective constant temperature time.

[0058] Preferably, in step S400, the target humidity H of the gauge block 0 Determined according to the humidity of the constant temperature container, the recommended value is H 0 =ambient humidity+2ΔH.

[0059] It is understandable that the target humidity of the gauge block cannot be set independently of the ambient humidity inside the constant temperature container. At the same time, the maximum allowable error of the sensor must also be taken into account to more fully guarantee the authenticity and validity of the final measurement results and ensure the accuracy of subsequent humidity control.

[0060] According to another aspect of the present application, a control device adopting the above-mentioned constant temperature and humidity control method for gauge block calibration is also provided, the control device comprising a constant temperature and humidity chamber 100, a controller 200, a temperature and humidity sensor 300 and an auxiliary constant temperature and humidity mechanism 400, the constant temperature chamber 100 is used to store gauge blocks, a drying component 102 connected to the controller 200 is arranged in the constant temperature chamber 100, the temperature and humidity sensor 300 is arranged in the constant temperature chamber 100 and connected to the controller 200, the temperature and humidity sensor 300 is used to monitor the temperature and humidity of the gauge block and the internal environment of the constant temperature chamber 100 and transmit the data to the controller 200, the auxiliary constant temperature and humidity mechanism 400 is connected to the controller 200 and the constant temperature chamber 100, the auxiliary constant temperature and humidity mechanism 400 is used to accept the control of the controller 200 and deliver constant temperature and humidity air to the constant temperature chamber 100, and the controller 200 is used to control the opening and closing of the drying component 102 and the auxiliary constant temperature and humidity mechanism 400 according to formula (2) and formula (3).

[0061] The control device of the present application adopts the above-mentioned constant temperature and humidity control method for gauge block calibration, which is mainly used before the gauge block calibration, and also has the above-mentioned beneficial effects. At the same time, the control device of the present application can realize the control of the constant temperature process of the gauge block, and solve the problem of slow evaporation rate of the residual cleaning agent on the surface of the gauge block and long drying time of the gauge block. The temperature and humidity of the gauge block during the constant temperature process are monitored in real time by the temperature and humidity sensor 300 in the constant temperature chamber 100, and the temperature in the constant temperature chamber 100 is adjusted in real time according to the temperature of the gauge block by the auxiliary constant temperature and humidity mechanism 400, so as to avoid large temperature fluctuations during the constant temperature process of the gauge block, resulting in uneven temperature field inside the gauge block, and at the same time, it can also solve the problem of mismatch between the temperature of the gauge block and the measuring instrument after the constant temperature.

[0062] Preferably, please refer to Figure 2As shown, a lifting assembly 101 is disposed at the bottom of the constant temperature chamber 100 , and the lifting assembly 101 is used to drive the constant temperature chamber 100 to move up and down.

[0063] It should be noted that during the constant temperature process, the gauge block needs to be measured using a gauge block comparator. If there is a large height difference between the gauge block and the gauge block comparator, it is easy to cause a large temperature difference between the two, affecting the accuracy of the measurement. Therefore, the height of the constant temperature chamber 100 and the gauge block can be adjusted by the lifting component 101, so that the gauge block and the gauge block comparator are at the same height, ensuring that the temperature difference between the gauge block and the gauge block comparator is minimized, and ensuring the stability and accuracy of the measurement.

[0064] Preferably, the lifting assembly 101 includes a plurality of telescopic rods arranged in a row, the telescopic rods including an inner rod and an outer tube, the side wall of the outer tube is provided with a limiting screw hole, the limiting screw hole is used to set a limiting bolt and lock the inner rod and the outer tube by the limiting bolt, the inner rod is used to be connected to the bottom of the constant temperature room 100, and the inner rods of each telescopic rod are connected by a connecting rod.

[0065] It can be understood that the constant temperature room 100 can be supported and height-adjusted by multiple telescopic rods. In order to improve the efficiency of adjustment and ensure the consistency of the height adjustment of the inner rods of each telescopic rod, the inner rods of each telescopic rod are connected to each other by a connecting rod, so that when the inner rod of one telescopic rod is adjusted in height, the height of other inner rods can be adjusted synchronously, which not only improves the adjustment efficiency, but also strengthens the support stability of each telescopic rod.

[0066] Preferably, please refer to Figure 2 As shown, the drying component 102 includes an adsorption dryer and an exhaust fan. The adsorption dryer is used to adsorb the humid air inside the constant temperature chamber 100. The exhaust fan is set at the exhaust hole preset on the side wall of the constant temperature chamber 100, and the exhaust fan is used to exhaust the gas in the constant temperature chamber 100.

[0067] It is understandable that since cleaning agents or water stains are likely to remain on the surface of the gauge block after cleaning, in order to speed up the evaporation rate of the cleaning agent residues or water stains on the surface of the gauge block, the adsorption dryer and the exhaust fan can be used in conjunction to achieve rapid discharge of the humid air inside the constant temperature chamber 100, which is beneficial to improving the efficiency of the constant temperature of the gauge block, shortening the constant temperature time, saving energy, and improving work efficiency.

[0068] Preferably, please refer to Figure 2 As shown, the control device also includes a dust filter assembly 103, which includes a filter and a dust cover. The filter and the dust cover are arranged at the exhaust hole preset on the side wall of the constant temperature room 100 and are located at the tail end of the exhaust end of the exhaust fan. The filter is used to prevent dust and impurities from entering the constant temperature room 100 from the exhaust hole, and the dust cover is used to close or open the exhaust hole.

[0069] It is understandable that in order to reduce the impact of external impurities entering the constant temperature chamber 100 through the exhaust hole on the gauge block, the exhaust hole is filtered and protected by a filter net to ensure that the interior of the constant temperature chamber 100 is pollution-free, improve the progress of temperature and humidity measurement, and thus ensure the constant temperature effect of the gauge block.

[0070] Optionally, the filter net may be covered with a layer of absorbent cotton to reduce the amount of humid air from the outside from entering the constant temperature chamber 100 and affecting the humidity inside the constant temperature chamber 100 .

[0071] Preferably, the dust cover is hinged to the side wall of the constant temperature chamber 100, and the side wall of the dust cover is provided with a heat insulation board.

[0072] It is understandable that when the drying function needs to be turned off, the adsorption dryer and the exhaust fan can be stopped, and the exhaust hole can be closed through the dust cover. At the same time, the insulation board on the side wall of the dust cover can play a heat insulation effect, reducing the temperature inside the constant temperature room 100 from being lost through the dust cover, which is beneficial to ensure the constant temperature effect and make the dust cover play a dustproof and heat-insulating effect.

[0073] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0074] This article uses specific examples to illustrate the principles and implementation methods of this application. The above examples are only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection of this application.

Claims

1. A constant temperature and humidity control method for gauge block calibration, characterized in that: The steps include: S100, measuring the temperature T of the gauge block; S200, determine whether the difference between the temperature T of the gauge block and the standard temperature T0 satisfies formula (1). If so, skip step S300 and proceed to step S400; if not, proceed to step S300: l n ·α·(T-T0)<40%·u c Right now: Where: l n is the length of the gauge block; α is the linear expansion coefficient of the gauge block, when the gauge block is a steel gauge block, α=11.5×10-6℃-1; T is the temperature of the gauge block, in ℃; Τ0 is the standard temperature, the value is 20℃; u c is the measurement uncertainty of the gauge block length; S300, calculate the constant temperature control time of the gauge block: Where: t is the actual constant temperature time of the gauge block, in min; S400, measure the humidity of the gauge block and control the humidity according to the following formula: Where: H is the measured humidity of the gauge block; H0 is the target humidity of the gauge block; ΔH is the humidity window threshold, and the recommended value is the maximum allowable error of the humidity sensor.

2. A constant temperature and humidity control method for gauge block calibration according to claim 1, characterized in that: The uncertainty of the standard gauge block length measurement in step S200 is u c =0.05μm+0.5×10 -6 × n , unit is μm.

3. A constant temperature and humidity control method for gauge block calibration according to claim 1, characterized in that: In step S300, when the difference between the actual measured temperature T of the gauge block and the standard temperature T0 satisfies formula (2), the constant temperature is continued while being controlled at 40% of the uncertainty of the gauge block length measurement. The constant temperature time is judged after 10 minutes until the constant temperature effect reaches the point where the difference between the actual measured temperature T of the gauge block and the standard temperature T0 does not satisfy formula (2), and the constant temperature ends.

4. A constant temperature and humidity control method for gauge block calibration according to claim 1, characterized in that: In step S400, the target humidity H0 of the gauge block is determined according to the humidity of the constant temperature container, and the recommended value is H0 = ambient humidity + 2ΔH.

5. A control device, characterized in that: A constant temperature and humidity control method for gauge block calibration as claimed in any one of claims 1 to 4 is adopted, wherein the control device comprises a constant temperature chamber (100), a controller (200), a temperature and humidity sensor (300) and an auxiliary constant temperature and humidity mechanism (400), wherein the constant temperature chamber (100) is used to store gauge blocks, a drying component (102) connected to the controller (200) is arranged in the constant temperature chamber (100), the temperature and humidity sensor (300) is arranged in the constant temperature chamber (100) and is connected to the controller (200), and the temperature and humidity sensor (300) ) is used to monitor the temperature and humidity of the internal environment of the gauge block and the constant temperature chamber (100) and transmit the data to the controller (200), the auxiliary constant temperature and humidity mechanism (400) is connected to the controller (200) and the constant temperature chamber (100), the auxiliary constant temperature and humidity mechanism (400) is used to accept the control of the controller (200) and deliver constant temperature and humidity air to the constant temperature chamber (100), the controller (200) is used to control the opening and closing of the drying component (102) and the auxiliary constant temperature and humidity mechanism (400) according to formula (2) and formula (3).

6. A control device according to claim 5, characterized in that: A lifting assembly (101) is arranged at the bottom of the constant temperature chamber (100), and the lifting assembly (101) is used to drive the constant temperature chamber (100) to move up and down.

7. A control device according to claim 6, characterized in that: The lifting assembly (101) comprises a plurality of telescopic rods arranged in a row, the telescopic rods comprising an inner rod and an outer tube, the side wall of the outer tube is provided with a limit screw hole, the limit screw hole is used to set a limit bolt and the inner rod and the outer tube are locked and limited by the limit bolt, the inner rod is used to be connected to the bottom of the constant temperature room (100), and the inner rods of the telescopic rods are connected by a connecting rod.

8. A control device according to claim 5, characterized in that: The drying component (102) comprises an adsorption dryer and an exhaust fan. The adsorption dryer is used to adsorb the humid air inside the constant temperature chamber (100). The exhaust fan is arranged at an exhaust hole preset on the side wall of the constant temperature chamber (100). The exhaust fan is used to exhaust the gas in the constant temperature chamber (100).

9. A control device according to claim 8, characterized in that: The control device also includes a dust filter assembly (103), which includes a filter screen and a dust cover. The filter screen and the dust cover are arranged at an exhaust hole preset on the side wall of the constant temperature room (100) and are located at the tail end of the exhaust end of the exhaust fan. The filter screen is used to prevent dust and impurities from entering the constant temperature room (100) from the exhaust hole, and the dust cover is used to close or open the exhaust hole.

10. A control device according to claim 9, characterized in that: The dust cover is hinged to the side wall of the constant temperature chamber (100), and the side wall of the dust cover is provided with a heat insulation board.

Images