A constant temperature and humidity control method and control device for a gauge block calibration

Abstract

The application discloses a kind of constant temperature and humidity control method and control device for gauge block verification, belong to metrological detection technical field, control method includes the temperature T of measuring gauge block, judge the difference of the temperature T of gauge block and standard temperature T0 Whether it meets the characteristic condition, to carry out constant temperature time control, and carry out humidity control.The application can realize the control of gauge block constant temperature process, solve the problem that cleaning agent on gauge block surface remains evaporates slowly, and gauge block dries long time.By the temperature in the constant temperature room of auxiliary constant temperature and humidity mechanism is adjusted according to gauge block temperature in real time, avoid the temperature fluctuation in gauge block constant temperature process, lead to the non-uniformity of gauge block internal temperature field, simultaneously can also solve the problem that gauge block constant temperature and measuring instrument temperature do not match.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metrological detection, in particular, to a constant temperature and humidity control method for gauge block verification. In addition, the present application also relates to a control device applied to the constant temperature and humidity control method for gauge block verification. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the present application. To the extent that the descriptions in this section describe the work of the inventors, and to the extent that the descriptions are not common general knowledge of people skilled in the art as of the filing date of this application, they do not constitute admitted prior art with respect to the present application.

[0003] In the field of metrological detection, the verification and application of gauge blocks are often involved. During verification, 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 of geometric quantity metrological verification, the verification of high-grade gauge blocks has higher requirements for the constant temperature of gauge blocks.

[0004] Before the verification of gauge blocks, the surface of the gauge blocks needs to be cleaned first to remove oil stains and impurities that affect the verification value. However, after cleaning, there will be cleaning agent residues on the surface of the gauge blocks, which need to be placed in a constant temperature and dry environment for drying. Especially when using water-based cleaning agents, the gauge blocks will need more time to dry. At the same time, gauge blocks are made of steel, which is affected by thermal expansion and contraction. Gauge blocks need to be verified at a temperature as close as possible to the standard temperature of 20℃. For example, the thermal expansion coefficient of steel is 11.5×10 -6 ℃ -1 , for a 100mm gauge block, the standard length will expand 11.5×10 -6 ℃ -1 ×100mm×1℃=1.15μm. In JJG146 Gauge Verification Regulation, it is required that the comparative measurement of gauge block length is that the allowable value of the temperature deviation of the gauge block from 20℃ is only 0.2℃ during comparative measurement.

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

[0006] However, we found that in the actual process, the following problems exist: due to the influence of environmental fluctuations, the temperature in the calibration room cannot be kept constant at 20℃ for a long time, which will cause a large fluctuation in the internal temperature of the natural constant temperature mass, and bring a large uncertainty to the subsequent mass measurement; due to the lack of accurate and efficient constant temperature method for mass calibration to control the constant temperature process of the mass, it is difficult to solve the problems of slow evaporation speed of the cleaning agent remaining on the surface of the mass, long drying time of the mass; the temperature is not effectively monitored during the constant temperature process, and the temperature in the constant temperature room cannot be adjusted in real time according to the temperature of the mass; and the temperature of the mass after constant temperature does not match the temperature of the measuring instrument.

[0007] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0008] In view of at least one of the above technical problems, the present application provides a constant temperature and humidity control method for mass calibration, which greatly improves the accuracy of the mass measurement temperature by comprehensively considering the length of the mass, the length measurement correction value, the linear expansion coefficient and the like, judges the constant temperature time according to the actual measurement temperature of the mass, makes the temperature of the mass within the allowable value at the end of constant temperature, avoids the traditional constant temperature time control without controlling the constant temperature effect; combined with the monitoring of the measurement humidity and the target humidity of the mass, realizes the specific time control of the constant temperature and humidity of the mass, ensures the constant temperature and humidity state of the mass, and solves the problems of large fluctuation under the natural constant temperature state of the mass and insufficient actual effective constant temperature time.

[0009] The present application also provides a control device applying the constant temperature and humidity control method for mass calibration.

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

[0011] S100, measuring the temperature T of the mass;

[0012] S200, judging whether the difference between the temperature T of the mass and the standard temperature T0 satisfies formula (1), if yes, skipping step S300 and performing step S400; if not, performing step S300:

[0013] l n ·α·(T-T0)<40%·u c

[0014] That is:

[0015] In the formula: l nL is the length of the gauge block; a is the linear expansion coefficient of the gauge block, a = 11.5 x 10-6℃-1 when the gauge block is a steel gauge block; T is the temperature of the gauge block, in units of ℃; T0 is the standard temperature, with a value of 20℃; u c L is the length of the gauge block; a is the linear expansion coefficient of the gauge block, a = 11.5 x 10-6℃-1 when the gauge block is a steel gauge block; T is the temperature of the gauge block, in units of ℃; T0 is the standard temperature, with a value of 20℃; u

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

[0017]

[0018] In the formula, t is the actual constant temperature time of the gauge block, in units of min;

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

[0020]

[0021] In the formula, H is the measured humidity of the gauge block; H0 is the target humidity of the gauge block; ΔH is the humidity window threshold, with a recommended value of the maximum allowed error of the humidity sensor.

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

[0023] In some embodiments of the present application, when the difference between the actual measured temperature T of the gauge block and the standard temperature T0 satisfies formula (2) in step S300, the constant temperature continues to be controlled at 40% of the gauge block length measurement uncertainty, the judgment of the constant temperature time continues after 10 minutes, and the constant temperature ends when the constant temperature effect reaches the difference between the actual measured temperature T of the gauge block and the standard temperature T0 not satisfying formula (2).

[0024] In some embodiments of the present application, the target humidity H0 of the gauge block in step S400 is determined according to the humidity of the constant temperature container, with a recommended value of H0 = ambient humidity + 2ΔH.

[0025] According to another aspect of the present application, a control device for the above-mentioned constant temperature and humidity control method for calibrating a mass block is also provided, the control device comprising a constant temperature chamber, a controller, a temperature and humidity sensor, and an auxiliary constant temperature and humidity mechanism, the constant temperature chamber being used for storing the mass block, a drying assembly being arranged in the constant temperature chamber and connected to the controller, the temperature and humidity sensor being arranged in the constant temperature chamber and connected to the controller, the temperature and humidity sensor being used for monitoring the temperature and humidity of the mass block and the internal environment of the constant temperature chamber and transmitting 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 for receiving control of the controller and delivering constant temperature and humidity air into the constant temperature chamber, and the controller being used for controlling the opening and closing of the drying assembly and the auxiliary constant temperature and humidity mechanism according to the formula (2) and the formula (3).

[0026] In some embodiments of the present application, the constant temperature chamber is provided with a lifting assembly, the lifting assembly being used for lifting the constant temperature chamber.

[0027] In some embodiments of the present application, the lifting assembly comprises a plurality of telescopic rods arranged in a row, each telescopic rod comprising an inner rod and an outer cylinder, a limiting screw hole being formed in the side wall of the outer cylinder, the limiting screw hole being used for arranging a limiting bolt and locking the inner rod and the outer cylinder through the limiting bolt, the inner rod being used for connecting to the bottom of the constant temperature chamber, and the inner rods of the telescopic rods being connected through a connecting rod.

[0028] In some embodiments of the present application, the drying assembly comprises an adsorption dryer and an exhaust fan, the adsorption dryer being used for adsorbing the humid air inside the constant temperature chamber, and the exhaust fan being arranged at a preset exhaust hole of the side wall of the constant temperature chamber and being used for exhausting the gas inside the constant temperature chamber.

[0029] In some embodiments of the present application, the control device further comprises a dustproof filtering assembly, the dustproof filtering assembly comprising a filter screen and a dustproof cover, the filter screen and the dustproof cover being arranged at the preset exhaust hole of the side wall of the constant temperature chamber and being located at the tail of the exhaust end of the exhaust fan, the filter screen being used for preventing dust and impurities from entering the constant temperature chamber from the exhaust hole, and the dustproof cover being used for closing or opening the exhaust hole.

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

[0031] The present application has the following beneficial effects:

[0032] The application discloses a constant temperature and humidity control method for gauge block detection, which can realize real-time temperature monitoring and constant temperature time control during the constant temperature process of the gauge block, realizes rapid evaporation of residual cleaning agent on the surface of the gauge block and keeps the gauge block in a constant temperature and humidity state all the time, solves the problems of large fluctuation and insufficient actual effective constant temperature time in the natural constant temperature state of the gauge block, greatly improves the measurement temperature accuracy of the gauge block by comprehensively considering the length of the gauge block, the length measurement correction value and the linear expansion coefficient, judges the constant temperature time according to the actual measurement temperature of the gauge block, keeps the temperature of the gauge block within the allowable value at the end of the constant temperature, avoids the traditional constant temperature time control without constant temperature effect control, and realizes specific time control of the constant temperature and humidity of the gauge block by combining the measurement humidity and the target humidity monitoring, thereby guaranteeing the constant temperature and humidity state of the gauge block and avoiding the large fluctuation in the natural constant temperature state of the gauge block.

[0033] The control device adopts the constant temperature and humidity control method for gauge block detection, mainly acts on the gauge block before detection, has the beneficial effects of the constant temperature and humidity control method, and can realize control of the constant temperature process of the gauge block, solve the problems of slow evaporation speed of residual cleaning agent on the surface of the gauge block and long drying time of the gauge block. The temperature and humidity in the constant temperature room are monitored in real time by the temperature and humidity sensor in the constant temperature room during the constant temperature process of the gauge block, the temperature in the constant temperature room is adjusted in real time according to the temperature of the gauge block by the auxiliary constant temperature and humidity mechanism, the large temperature fluctuation during the constant temperature process of the gauge block is avoided, the non-uniformity of the internal temperature field of the gauge block is avoided, and the problem that the temperature of the gauge block after the constant temperature process does not match the temperature of the measuring instrument is solved.

[0034] Of course, any product implementing the application does not necessarily need to achieve all the advantages described above. In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] The drawings that form a part of this application provide further understanding of the application, and the illustrative embodiments of the application and their description serve to explain the application. The drawings do not constitute an improper limitation on the application. In the drawings:

[0036] Figure 1 The constant temperature and humidity control flowchart of the gauge block is a preferred embodiment of the application;

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

[0038] Legend: 100, constant temperature chamber; 101, lifting assembly; 102, drying assembly; 103, dustproof filtering 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 with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

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

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

[0042] S200, judging whether the difference between the temperature T of the gauge and the standard temperature T0 satisfies formula (1), if yes, skipping step S300 and proceeding to step S400; if not, proceeding to step S300:

[0043] l n ·α·(T-T0)<40%·u c

[0044] That is:

[0045] In the formula: l n is the length of the gauge; α is the linear expansion coefficient of the gauge, when the gauge is a steel gauge, α = 11.5 × 10-6℃-1; T is the temperature of the gauge, unit: ℃; T0 is the standard temperature, value: 20℃; u c is the uncertainty of the gauge length measurement;

[0046] S300, calculating the time for constant temperature control of the gauge:

[0047]

[0048] In the formula: t is the actual constant temperature time of the gauge, unit: min;

[0049] S400, measuring the humidity of the gauge, and controlling the humidity according to the following formula:

[0050]

[0051] In the formula: H is the measured humidity of the gauge; H0 is the target humidity of the gauge; ΔH is the humidity window threshold, recommended value: maximum allowed error of the humidity sensor.

[0052] In some embodiments, during the constant temperature process of the gauge block, the ambient humidity is 41% RH, and the target humidity of the gauge block is set to H0=45% RH according to the accuracy of the sensor ±2% RH (MPE) and the comprehensive consideration of the environmental conditions, and the humidity window threshold is ΔH=2% RH. After the gauge block is cleaned and placed on the constant temperature platform of the constant temperature chamber 100, the initial humidity of the gauge block constant temperature platform is 85% RH>(H0+ΔH) at this time, and the drying assembly 102 is turned on; after a period of time, the platform humidity decreases to 43% RH<(H0-ΔH), at which time the drying is turned off.

[0053] 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 fast evaporation of the residual cleaning agent on the surface of the gauge block and keep the gauge block in a constant temperature and humidity state at all times. The problem of large fluctuation in the natural constant temperature state of the gauge block and insufficient actual effective constant temperature time is solved. The accuracy of the measured temperature of the gauge block is greatly improved by comprehensively considering the length of the gauge block, the length measurement correction value, the linear expansion coefficient, etc., the constant temperature time is judged according to the actual measured temperature of the gauge block, the temperature of the gauge block is within the allowable value when the constant temperature ends, and the traditional method of only controlling the constant temperature time without controlling the constant temperature effect is avoided; 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 phenomenon of large fluctuation in the natural constant temperature state of the gauge block is avoided.

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

[0055] It can be understood that the length measurement of the gauge block will be affected due to the continuous change of the temperature and humidity of the gauge block. In order to improve the accuracy of the measurement parameters, the length measurement uncertainty of the gauge block is considered, and 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 the subsequent measurement of the gauge block.

[0056] Preferably, when the difference between the actual measured temperature T of the gauge block and the standard temperature T0 satisfies formula (2) in step S300, the constant temperature continues while being controlled within 40% of the length measurement uncertainty of the gauge block, and the judgment of the constant temperature time is continued after 10 minutes, until the constant temperature ends when the difference between the actual measured temperature T of the gauge block and the standard temperature T0 does not satisfy formula (2).

[0057] It can be understood that the step S300 can realize that the constant temperature time is judged according to the actual measured temperature of the mass block, so that the temperature of the mass block at the end of constant temperature is within the allowable value, avoiding the traditional constant temperature time control without constant temperature effect control, effectively ensuring the effect of constant temperature, and solving the problems of large fluctuation of the mass block in the natural constant temperature state and insufficient actual effective constant temperature time.

[0058] Preferably, the target humidity H0 of the mass block in step S400 is determined according to the humidity of the constant temperature container, and the recommended value is H0 = ambient humidity + 2ΔH.

[0059] It can be understood that the target humidity of the mass block cannot be set without considering the ambient humidity inside the constant temperature container, and the maximum allowable error of the sensor also needs to be considered, so as to more fully guarantee the authenticity and effectiveness of the final measurement result and ensure the accuracy of subsequent humidity control.

[0060] According to another aspect of the present application, a control device adopting the above mass block calibration constant temperature and humidity control method is also provided, the control device comprising a constant temperature 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 for storing the mass block, the constant temperature chamber 100 is provided with a drying assembly 102 connected with the controller 200, the temperature and humidity sensor 300 is arranged in the constant temperature chamber 100 and connected with the controller 200, the temperature and humidity sensor 300 is used for monitoring the temperature and humidity of the mass block and the internal environment of the constant temperature chamber 100 and transmitting data to the controller 200, the auxiliary constant temperature and humidity mechanism 400 is connected with the controller 200 and the constant temperature chamber 100, the auxiliary constant temperature and humidity mechanism 400 is used for receiving the control of the controller 200 and delivering constant temperature and humidity air into the constant temperature chamber 100, and the controller 200 is used for controlling the opening and closing of the drying assembly 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 mass block calibration constant temperature and humidity control method, mainly acts before the mass block calibration, also has the above beneficial effects, and can realize the control of the mass block constant temperature process, solve the problems of slow evaporation speed of the cleaning agent remaining on the surface of the mass block and long drying time of the mass block. The temperature and humidity in the constant temperature chamber 100 are monitored in real time by the temperature and humidity sensor 300, the temperature in the constant temperature chamber 100 is adjusted in real time according to the temperature of the mass block by the auxiliary constant temperature and humidity mechanism 400, the temperature fluctuation in the mass block constant temperature process is avoided, the internal temperature field of the mass block is uniform, and the problem of temperature mismatch between the mass block and the measuring instrument after constant temperature is solved.

[0062] Preferably, please refer to Figure 2 It can be understood that the step S300 can realize that the constant temperature time is judged according to the actual measured temperature of the mass block, so that the temperature of the mass block at the end of constant temperature is within the allowable value, avoiding the traditional constant temperature time control without constant temperature effect control, effectively ensuring the effect of constant temperature, and solving the problems of large fluctuation of the mass block in the natural constant temperature state and insufficient actual effective constant temperature time.

[0063] It should be noted that during the constant temperature process, the gauge needs to be measured by the gauge comparator. If there is too large a height difference between the gauge and the gauge comparator, it is easy to cause the temperature difference between the two to be too large, affecting the accuracy of the measurement. Therefore, the height of the constant temperature chamber 100 and the gauge can be adjusted by the lifting assembly 101, so that the gauge and the gauge comparator are at the same height, ensuring that the temperature difference between the gauge and the gauge comparator is minimized, 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 cylinder, the side wall of the outer cylinder 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 cylinder by the limiting bolt, the inner rod is used to connect with the bottom of the constant temperature chamber 100, and the inner rods of the telescopic rods are connected by a connecting rod.

[0065] It can be understood that the constant temperature chamber 100 can be supported and the height adjusted by the plurality of telescopic rods. In order to improve the adjustment efficiency and ensure the consistency of the height adjustment of the inner rods of the telescopic rods, the inner rods of the telescopic rods are connected to each other by the connecting rod, so that when the inner rod of one telescopic rod is adjusted in height, the other inner rods can be driven to adjust in height at the same time. This not only improves the adjustment efficiency, but also enhances the support stability of the telescopic rods.

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

[0067] It can be understood that after the gauge is cleaned, cleaning agent or water stains may remain on the surface. In order to speed up the evaporation speed of the cleaning agent or water stains on the surface of the gauge, the adsorption dryer and the exhaust fan are matched to quickly exhaust the wet air inside the constant temperature chamber 100, which is conducive to improving the efficiency of the constant temperature of the gauge, shortening the constant temperature time, saving energy, and speeding up the work efficiency.

[0068] Preferably, please refer to Figure 2 As shown in the figure, the control device further includes a dustproof filtering assembly 103, the dustproof filtering assembly 103 includes a filter screen and a dust cover, the filter screen and the dust cover are arranged at the exhaust hole of the side wall of the constant temperature chamber 100 and located at the tail of the exhaust end of the exhaust fan, the filter screen is used to prevent dust and impurities from entering the constant temperature chamber 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 from the exhaust hole on the gauge block, the exhaust hole is filtered and protected by a filter to ensure that there is no pollution inside the constant temperature chamber 100, 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 that enters the constant temperature chamber 100 and affects 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 conducive to ensuring the constant temperature effect and making the dust cover play a dust-proof 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 includes other elements not explicitly listed, or also includes elements that are 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 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, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can make several improvements, modifications or changes, 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 protected by this application.

Claims

1. A constant temperature and humidity control method for a gauge block verification, characterized by, The method comprises the following steps: S100, measuring the temperature T of the gauge block; S200, determining whether the difference between the temperature T of the gauge block and the standard temperature T0 satisfies formula (1), if yes, skipping step S300 and proceeding to step S400; if not, proceeding to step S300: l n • a • (T - T0) < 40% • u c That is, 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 made of steel, 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, calculating the time for constant temperature control of the gauge block: In the formula, t is the actual constant temperature time of the gauge block, in minutes; S400, measuring the humidity of the gauge block, and controlling the humidity according to the following formula: In the formula, 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; 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 continues while being controlled within 40% of the length measurement uncertainty of the gauge block, and the judgment of the constant temperature time is continued after 10 minutes until the constant temperature ends when the difference between the actual measured temperature T of the gauge block and the standard temperature T0 does not satisfy formula (2).

2. The constant temperature and humidity control method for a gauge block verification according to claim 1, wherein The standard block length measurement uncertainty u in step S200 c = 0.05 μm + 0.5 x 10 -6 x l n , in units of μm.

3. The constant temperature and humidity control method for a gauge block verification according to claim 1, wherein 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.

4. A control device characterized by comprising: The constant temperature and humidity control method for gauge block verification according to any one of claims 1-3, 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), the constant temperature chamber (100) is used for storing the gauge block, a drying assembly (102) is arranged in the constant temperature chamber (100) and connected with the controller (200), the temperature and humidity sensor (300) is arranged in the constant temperature chamber (100) and connected with the controller (200), the temperature and humidity sensor (300) is used for monitoring the temperature and humidity of the gauge block and the internal environment of the constant temperature chamber (100) and transmitting data to the controller (200), the auxiliary constant temperature and humidity mechanism (400) is connected with the controller (200) and the constant temperature chamber (100), and the auxiliary constant temperature and humidity mechanism (400) is used for receiving the control of the controller (200) and delivering constant temperature and humidity air into the constant temperature chamber (100), and the controller (200) is used for controlling the opening and closing of the drying assembly (102) and the auxiliary constant temperature and humidity mechanism (400) according to formula (2) and formula (3).

5. A control device according to claim 4, wherein The bottom of the constant temperature chamber (100) is provided with a lifting assembly (101), and the lifting assembly (101) is used for driving the constant temperature chamber (100) to lift.

6. A control device according to claim 5, characterized in that: The lifting assembly (101) comprises a plurality of telescopic rods arranged in an array, each telescopic rod comprises an inner rod and an outer cylinder, a limiting screw hole is formed in the side wall of the outer cylinder, the limiting screw hole is used for arranging a limiting bolt, and the inner rod and the outer cylinder are locked and limited by the limiting bolt, the inner rod is used for being connected with the bottom of the constant temperature chamber (100), and the inner rods of the telescopic rods are connected by connecting rods.

7. A control device according to claim 4, wherein The drying assembly (102) comprises an adsorption dryer and an exhaust fan, the adsorption dryer is used for adsorbing the humid air in the constant temperature chamber (100), and the exhaust fan is arranged at a preset exhaust hole in the side wall of the constant temperature chamber (100) and used for exhausting the gas in the constant temperature chamber (100).

8. A control device according to claim 7, wherein The control device further comprises a dustproof filtering assembly (103) comprising a filtering screen and a dustproof cover, the filtering screen and the dustproof cover being arranged at a preset exhaust hole of a side wall of the constant-temperature chamber (100) and located at a tail of an exhaust end of the exhaust fan, the filtering screen being used for preventing dust impurities from entering the constant-temperature chamber (100) from the exhaust hole, and the dustproof cover being used for closing or opening the exhaust hole.

9. A control device according to claim 8, wherein The dustproof cover is hinged to the side wall of the constant-temperature chamber (100), and a heat insulation plate is arranged on the side wall of the dustproof cover.

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