Temperature switch full-automatic verification system and method

Abstract

The invention provides a full-automatic verification system and method for a temperature switch. The system comprises a to-be-tested pressure type temperature switch, a control device, a heating device and an adjusting device. The control device adjusts the medium in the heating device to a preset temperature according to the temperature adjusting instruction, and the to-be-tested pressure type temperature switch senses the temperature change of the medium and outputs switch information. The temperature measuring device is arranged in the heating device to obtain the current temperature, the control device is connected with the to-be-measured temperature switch and the temperature measuring device to obtain switch information and the current temperature, the temperature switch is calibrated through the adjusting device according to the preset temperature, the current temperature and the switch information, automatic calibration is achieved, and verification efficiency and accuracy are improved.

Description

Technical Field

[0001] This application relates to the field of industrial automation control technology, and particularly to a full-automatic calibration system and method for temperature switches. Background Art

[0002] For the control of existing temperature switches and the adjustment of switches, manual control is required: Since the action of a switch quantity instrument depends on the actual action setting value of the switch, if the setting value of the temperature switch is inaccurate, it needs to be continuously adjusted by humans and the temperature is given repeatedly to ensure the accuracy of the temperature switch setting value. Manual control results in a long calibration time and a long adjustment time for the temperature switch, seriously affecting the efficiency of the calibration process. Summary of the Invention

[0003] This application provides a full-automatic calibration system and method for temperature switches to solve the problems of long calibration time, long adjustment time, low efficiency, and poor accuracy caused by manual control.

[0004] The technical solution adopted by this application to solve its technical problems is: to provide a full-automatic calibration system for temperature switches, including a pressure type temperature switch to be tested. The calibration system further includes a control device, a heating device, and an adjusting device;

[0005] The control device is used to adjust the medium in the heating device to a preset temperature according to a temperature adjustment instruction;

[0006] The pressure type temperature switch to be tested senses the temperature change of the medium in the heating device and outputs switch information;

[0007] A temperature measuring device for obtaining the current temperature of the medium is provided in the heating device;

[0008] The control device is connected to the pressure type temperature switch to be tested and the temperature measuring device, and is used to obtain the switch information and the current temperature;

[0009] The control device is further used to calibrate the pressure type temperature switch to be tested through the adjusting device according to the preset temperature, the current temperature, and the switch information.

[0010] In an embodiment, the heating device further includes a heating module and a cooling module;

[0011] The control device is respectively connected to the heating module and the cooling module, and is used to adjust the heating module or the cooling module to work according to the current temperature and the preset temperature so that the medium of the heating device is kept constant at the preset temperature.

[0012] In one embodiment, the pressure type temperature switch to be measured includes a force balance device, a pressure conduction device, and a micro switch device; the adjusting device includes a fixed value adjusting device and / or a hysteresis adjusting device;

[0013] One end of the pressure conduction device is arranged in the heating device, and the other end of the pressure conduction device is arranged at the input end of the force balance device, and is used for sensing the temperature change of the heating device and converting it into a pressure change to be transmitted to the force balance device, and the micro switch device is arranged at the output end of the force balance device;

[0014] The control device is connected to the fixed value end of the force balance device through the fixed value adjusting device, and is used for adjusting the initial fixed value threshold of the fixed value adjusting device according to the temperature adjustment instruction, and also calibrating the initial fixed value threshold according to the current temperature, the preset temperature, and the switch information;

[0015] And / or, the control device is connected to the hysteresis end of the force balance device through the hysteresis adjusting device, and is used for adjusting the initial hysteresis threshold of the hysteresis adjusting device according to the temperature adjustment instruction, and also calibrating the initial hysteresis threshold according to the current temperature, the preset temperature, and the switch information.

[0016] In one embodiment, the input end and the output end of the force balance device are oppositely arranged on both sides of the same end;

[0017] The adjusting end and the hysteresis end of the force balance device are arranged at the other end opposite to the input end of the force balance device.

[0018] In one embodiment, the fixed value adjusting device includes a first motor device, a first screw, a first nut, and a first elastic element; the hysteresis adjusting device includes a second motor device, a second screw, a second nut, and a second elastic element;

[0019] The first motor is connected to one end of the first elastic element through the first screw, the first nut is arranged on the first screw, and the other end of the first elastic element is connected to the fixed value adjusting end;

[0020] The second motor is connected to one end of the second elastic element through the second screw, the second nut is arranged on the second screw, and the other end of the second elastic element is connected to the hysteresis adjusting end.

[0021] In one embodiment, the control device adjusts the first motor and / or the second motor through pulse width modulation.

[0022] The present application also provides a full-automatic calibration method for a temperature switch, which is used for the full-automatic calibration system of the temperature switch described in any one of the above, and the method includes the following steps:

[0023] Step S1: Obtain a temperature adjustment instruction, and adjust the temperature of the medium in the heating device to a preset temperature according to the temperature adjustment instruction;

[0024] Step S2: Obtain the current temperature information of the heating device and the switch information of the pressure temperature switch;

[0025] Step S3: Control the adjustment device to calibrate the pressure temperature switch according to the current temperature, the preset temperature and the switch information.

[0026] In an embodiment, the heating device further includes a heating module and a cooling module;

[0027] The method further includes:

[0028] Adjust the heating module or the cooling module to work according to the current temperature and the preset temperature so that the medium of the heating device is kept constant at the preset temperature.

[0029] In an embodiment, the adjustment device includes a fixed-value adjustment device and / or a hysteresis adjustment device respectively connected to the control device;

[0030] The step S1 includes:

[0031] Set an initial fixed-value threshold of the fixed-value adjustment device and / or an initial hysteresis threshold of the hysteresis adjustment device based on the temperature adjustment instruction;

[0032] The step S3 includes:

[0033] Adjust the initial fixed-value threshold and / or the initial hysteresis threshold according to the current temperature, the preset temperature and the switch information.

[0034] In an embodiment, the adjusting the temperature of the medium in the heating device to the preset temperature according to the temperature adjustment instruction includes:

[0035] Adjust the temperature of the medium in the heating device to the preset temperature at a preset temperature rate according to the temperature adjustment instruction.

[0036] Implementing the present application has the following beneficial effects: The present application provides a fully automatic calibration system and method for a temperature switch. The fully automatic calibration system for the temperature switch includes a pressure-operated temperature switch to be tested. The calibration system further includes a control device, a heating device, and an adjusting device. The control device is configured to adjust the medium in the heating device to a preset temperature according to a temperature adjustment instruction. The pressure-operated temperature switch to be tested senses the temperature change of the medium in the heating device and outputs switch information. A temperature measuring device for obtaining the current temperature of the medium is provided in the heating device. The control device is connected to the pressure-operated temperature switch to be tested and the temperature measuring device for obtaining the switch information and the current temperature. The control device is further configured to calibrate the pressure-operated temperature switch to be tested through the adjusting device according to the preset temperature, the current temperature, and the switch information. The present application realizes the automatic calibration of the temperature switch by setting the control device and the adjusting device, effectively solving the problems of long calibration time and long adjustment time caused by manual control, and improving the efficiency and accuracy of the calibration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0038] Figure 1 is the logic block diagram of the fully automatic calibration system for the temperature switch of the present application;

[0039] Figure 2 is the logic block diagram of some components of the fully automatic calibration system for the temperature switch of the present application;

[0040] Figure 3 is the schematic structural diagram of some components of the fully automatic calibration system for the temperature switch of the present application;

[0041] Figure 4 is the structural block diagram of the fully automatic calibration system for the temperature switch of the present application;

[0042] Figure 5 is the schematic flow diagram of the fully automatic calibration method for the temperature switch of the present application.

[0043] Component Labels:

[0044] 10 - Pressure-operated temperature switch to be tested; 11 - Force balance device; 12 - Pressure conduction device; 121 - Bellows; 13 - Microswitch device; 20 - Control device; 30 - Heating device; 31 - Temperature measuring device; 32 - Heating module; 33 - Cooling module; 40 - Adjusting device; 41 - Fixed value adjusting device; 411 - First elastic element; 412 - First screw 412; 42 - Hysteresis adjusting device; 421 - Second elastic element; 422 - Second screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The following further elaborates on the present application in detail through specific embodiments in conjunction with the accompanying drawings. Similar components in different embodiments adopt related similar component numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other components, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and general technical knowledge in the field.

[0046] A pressure type temperature switch, the temperature measuring medium of the pressure type temperature switch is an inert gas, a liquid or a saturated vapor. It utilizes the properties of the thermal expansion and contraction of a constant volume gas or liquid to cause pressure changes, and the properties of the saturated pressure change of the saturated vapor to convert the temperature change into a pressure change. Then, the pressure change is converted into a displacement change through an elastic element. Similar to a pressure switch, the displacement is then applied to a microswitch through a mechanical lever to emit a switching quantity signal.

[0047] Temperature acts on the sensing element of the "steam pressure type". This element is fully enclosed. Due to the temperature change, the volume of the steam changes, thereby causing an increase or decrease in the force exerted by the elastic element metal pressure sensing box on the lever. This force interacts with the adjusting spring force, causing the lever to displace to trigger or release the microswitch.

[0048] As Figures 1 to 4 shown, the technical solution adopted by the present application to solve its technical problems is: to provide a fully automatic calibration system for a temperature switch, including a pressure type temperature switch 10 to be tested. The calibration system further includes a control device 20, a heating device 30, and an adjusting device 40;

[0049] The control device 20 is used to adjust the medium in the heating device 30 to a preset temperature according to a temperature adjustment instruction;

[0050] The pressure type temperature switch 10 to be tested senses the temperature change of the medium in the heating device 30 and outputs switch information;

[0051] A temperature measuring device 31 for obtaining the current temperature of the medium is provided in the heating device 30;

[0052] The control device 20 is connected to the pressure type temperature switch 10 to be tested and the temperature measuring device 31, and is used to obtain switch information and the current temperature;

[0053] The control device 20 is further configured to calibrate the pressure and temperature switch 10 to be measured by adjusting the device 40 according to a preset temperature, a current temperature, and switch information.

[0054] Specifically, the present application provides a fully automatic calibration system for a temperature switch. The system mainly includes a pressure and temperature switch 10 to be measured, a control device 20, a heating device 30, and an adjusting device 40. The control device 20 includes a controller. The pressure and temperature switch 10 to be measured is used to sense temperature changes and output corresponding switch information. As the control center of the entire calibration system, the control device 20 is responsible for receiving temperature adjustment instructions and adjusting the medium in the heating device 30 to a preset temperature according to the instructions. The control device 20 is also connected to the pressure and temperature switch 10 to be measured and a temperature measuring device 31, and is used to obtain switch information and current temperature data. The heating device 30 is used to provide a medium environment with adjustable temperature, and is provided with a temperature measuring device 31 for obtaining the current temperature of the medium. The adjusting device 40 calibrates the pressure and temperature switch 10 to be measured according to the instructions of the control device 20.

[0055] In terms of the working process, first, the user inputs a temperature adjustment instruction through the control device 20, specifying the preset temperature that the medium in the heating device 30 needs to reach. Next, the control device 20 controls the medium in the heating device 30 to be heated or cooled to the preset temperature according to the temperature adjustment instruction. Subsequently, the pressure and temperature switch 10 to be measured senses the temperature change of the medium in the heating device 30 and outputs corresponding switch information. The control device 20 collects the switch information output by the pressure and temperature switch 10 to be measured and the current temperature data obtained by the temperature measuring device 31. Finally, the control device 20 calibrates the pressure and temperature switch 10 to be measured through the adjusting device 40 according to the preset temperature, the current temperature, and the switch information. During the calibration process, the control device 20 will adjust the setting value of the temperature switch according to the deviation between the actual temperature and the preset temperature, so that it can accurately act at the predetermined temperature.

[0056] As Figure 4 shown, it should be noted that the control device 20 includes a controller. The system also includes a power supply module and a man-machine interaction module according to the actual situation:

[0057] The power supply module provides power for each module, provides system power for the controller, supplies power for the automatic temperature bath, and supplies power for the adjustment actuator motor. The man-machine module can input the function position information of the temperature switch to be calibrated, as well as set parameters such as temperature setting value and dead band in a specified format, and can debug the temperature bath and regulator through the input module, query the test results, export the test results and other functions.

[0058] As Figure 2 shown, further, the heating device 30 further includes a heating module 32 and a cooling module 33;

[0059] The control device 20 is respectively connected to the heating module 32 and the cooling module 33, and is used to adjust the operation of the heating module 32 or the cooling module 33 according to the current temperature and the preset temperature, so that the medium of the heating device 30 is kept constant at the preset temperature.

[0060] In one embodiment, the heating device 30 is an automatic temperature bath, which consists of a heating module 32, a cooling module 33 and a temperature measurement module. When setting the temperature, it is realized by the heating module 32. The heating module 32 receives the temperature signal instruction sent by the controller to heat. The temperature measurement module measures the real-time temperature value and outputs the corresponding signal back to the controller. The temperature measurement module can be replaced, and different temperature measurement modules are used for different temperature ranges, which can ensure the accuracy of temperature measurement. The controller controls the automatic temperature bath to heat or cool the temperature switch through the preset temperature and the actual measurement value, so that the temperature bath is kept at the preset temperature.

[0061] Furthermore, the pressure temperature switch 10 to be measured includes a force balance device 11, a pressure conduction device 12 and a micro switch device 131; the adjusting device 40 includes a setting adjusting device 41 and / or a hysteresis adjusting device 42;

[0062] One end of the pressure conduction device 12 is arranged in the heating device 30, and the other end of the pressure conduction device 12 is arranged at the input end of the force balance device 11, and is used to sense the temperature change of the heating device 30 and convert it into a pressure change and transmit it to the force balance device 11. The micro switch device 131 is arranged at the output end of the force balance device 11;

[0063] The control device 20 is connected to the setting end of the force balance device 11 through the setting adjusting device 41, and is used to adjust the initial setting threshold value of the setting adjusting device 41 according to the temperature adjustment instruction, and also calibrate the initial setting threshold value according to the current temperature, the preset temperature and the switch information;

[0064] And / or, the control device 20 is connected to the hysteresis end of the force balance device 11 through the hysteresis adjusting device 42, and is used to adjust the initial hysteresis threshold value of the hysteresis adjusting device 42 according to the temperature adjustment instruction, and also calibrate the initial hysteresis threshold value according to the current temperature, the preset temperature and the switch information.

[0065] It should be noted that the positions of the fixed-value adjustment device 41 and the dead-band adjustment device 42 relative to the force balance device 11 can be adjusted according to the actual situation. In one embodiment, the force transmission device includes a bellows 121, a capillary tube, and a temperature bulb. The temperature bulb is arranged in an automatic temperature bath. The outlet of the bellows 121 faces the input end of the balance device. The controller in the control device 20 serves as the center of the entire calibration system and is responsible for sending temperature control instructions to the automatic temperature bath, and then receiving the real-time temperature signal feedback from the automatic temperature bath. The controller commands the automatic temperature bath to continue heating or cooling according to the deviation between the preset target value and the real-time temperature signal until the temperature reaches the target value, that is, the preset temperature. The power supply system provides stable power support for the controller and the automatic temperature bath. The temperature switch senses the temperature of the automatic temperature bath and outputs a switch signal when the temperature reaches its action value. The controller collects this switch signal and records the action value of the temperature switch based on the change of the switch signal. If the deviation of the action value of the temperature switch exceeds the accuracy range, the controller will drive the adjustment actuator to act according to the deviation value, adjust the nut of the fixed-value adjustment device 41 or the dead-band adjustment device 42, and then change the fixed value and dead-band value of the temperature switch to ensure that the action value of the temperature switch meets the preset fixed-value requirements.

[0066] Further, the input end and the output end of the force balance device 11 are oppositely arranged on both sides of the same end;

[0067] The adjustment end and the dead-band end of the force balance device 11 are arranged at the other end opposite to the input end of the force balance device 11.

[0068] Further, the fixed-value adjustment device 41 includes a first motor device, a first screw rod, a first nut, and a first elastic element 411; the dead-band adjustment device 42 includes a second motor device, a second screw rod 422, a second nut, and a second elastic element 421;

[0069] The first motor is connected to one end of the first elastic element 411 through the first screw rod. The first nut is arranged on the first screw rod, and the other end of the first elastic element 411 is connected to the fixed-value adjustment end;

[0070] The second motor is connected to one end of the second elastic element 421 through the second screw rod 422. The second nut is arranged on the second screw rod 422, and the other end of the second elastic element 421 is connected to the dead-band adjustment end.

[0071] It should be noted that the fixed value adjustment device 41 is composed of a first motor device, a first screw rod, a first nut, and a first elastic element 411. The first motor is connected to one end of the first elastic element 411 through the first screw rod. The first nut is installed on the first screw rod, and the other end of the first elastic element 411 is connected to the fixed value adjustment end. This device is mainly used to adjust the fixed value of the temperature switch, that is, the set value at which the temperature switch operates. By rotating the first motor to drive the first screw rod to rotate, the first nut is made to move along the screw rod, changing the compression amount of the first elastic element 411, thereby adjusting the position of the fixed value adjustment end and achieving precise adjustment of the fixed value of the temperature switch.

[0072] The hysteresis adjustment device 42 is composed of a second motor device, a second screw rod 422, a second nut, and a second elastic element 421. The second motor is connected to one end of the second elastic element 421 through the second screw rod 422. The second nut is installed on the second screw rod 422, and the other end of the second elastic element 421 is connected to the hysteresis adjustment end. This device is mainly used to adjust the hysteresis of the temperature switch, that is, the difference between the operating value and the recovery value of the temperature switch. By rotating the second motor to drive the second screw rod 422 to rotate, the second nut is made to move along the screw rod, changing the compression amount of the second elastic element 421, thereby adjusting the position of the hysteresis adjustment end and achieving precise adjustment of the hysteresis of the temperature switch.

[0073] It should be noted that the controller in the control device 20 internally stores the temperature values corresponding to the fixed values and range hysteresis of each temperature switch. When calibrating the temperature switch, the controller can compare and calculate based on the parameters preset by it, and perform corresponding heating and adjustment on the temperature switch calibration thermostat according to the calculation results. After installing all components, by selecting the function position through the input module and starting the system, the controller will heat according to the preset steps and obtain the operating and recovery parameters of the temperature switch. After obtaining all the parameters before adjustment, the controller will calculate the deviation between the operating value of the temperature switch and the actual required fixed value and the overall accuracy, and formulate an adjustment plan based on the deviation. Through the micro motor and gear structure, the fixed value nut and hysteresis nut of the temperature switch are adjusted, thereby achieving precise adjustment of the temperature switch.

[0074] The controller contains the set values of each temperature switch and the temperature values corresponding to the range hysteresis. When calibrating the temperature switch, it can compare and calculate according to the preset parameters, heat and adjust the temperature calibration bath of the temperature switch accordingly. After installing all components, through the input module of the human-machine interaction module, where the human-machine interaction module is connected to the controller, after selecting the function position and starting, the controller can heat and obtain the action and recovery parameters of the temperature switch according to the preset steps. After obtaining all the parameters before adjustment, the controller calculates the deviation between the action value of the temperature switch and the actual required set value and the overall accuracy, and formulates an adjustment plan for the temperature switch according to the deviation, and adjusts the temperature switch. It can be achieved by a micro motor and a gear structure by adjusting the set nut and the hysteresis nut of the temperature switch.

[0075] Specifically, the first motor and the second motor are DC micro motors. The DC micro motors are controlled by PWM (pulse width modulation) waves to achieve the forward and reverse control and speed control of the motors, and the torque and speed of the motors are controlled through the gear transmission system, so as to accurately adjust the set value and hysteresis of the temperature switch.

[0076] Furthermore, the control device 20 adjusts the first motor and / or the second motor through pulse width modulation.

[0077] As Figure 5 shown, the present application also provides a full-automatic calibration method for a temperature switch, which is used for the full-automatic calibration system of the temperature switch in any one of the above items. The method includes the following steps:

[0078] Step S1: Obtain a temperature adjustment instruction, and adjust the medium temperature in the heating device 30 to a preset temperature according to the temperature adjustment instruction;

[0079] Step S2: Obtain the current temperature information of the heating device 30 and the switch information of the pressure temperature switch;

[0080] Step S3: Control the adjustment device 40 to calibrate the pressure temperature switch according to the current temperature, the preset temperature and the switch information.

[0081] In a specific embodiment, the adjustment device 40 is a regulator. The calibration platform has the function of calibrating the temperature switch, and can meet the calibration requirements of the temperature switch with requirements for both the set value and the hysteresis or the temperature switch only with requirements for the set value, and finally generates a calibration result report. The whole calibration process is as follows:

[0082] First, open the main operation interface and set the set value and hysteresis according to the specific requirements of the temperature switch to be calibrated. In order to improve the accuracy of capturing the action value, a lower heating rate limit value can be set in the "control settings" to ensure that the temperature change process is stable and controllable.

[0083] Next, connect the regulator to the temperature switch to ensure that the regulator can smoothly complete the adjustment of the adjusting nut, thereby achieving precise calibration of the temperature switch. At the same time, connect the switching quantity signal of the temperature switch to the electrical measurement interface of the controller, and place the temperature sensor bulb of the temperature switch in the automatic temperature bath to ensure accurate transmission and real-time monitoring of the temperature signal.

[0084] After clicking "Start", the platform gradually controls the temperature of the temperature bath to rise, and real-time collects the actual temperature value and the switch status value to ensure the data integrity and real-time nature during the calibration process. Until the switch actuates, the system captures and displays the temperature value at the time of actuation, and simultaneously plots the relationship curve between the temperature and the switching value of the electrical measurement signal, visually showing the actuation temperature value and the recovery value of the temperature switch, providing an intuitive basis for the evaluation of the calibration result.

[0085] If the set value of the temperature switch is inaccurate, the controller will automatically control the regulator to act according to the deviation between the current actuation value of the temperature switch and the target value, adjust the set value screw or the dead band screw to change the set value and dead band of the switch to be calibrated, ensuring that it meets the preset requirements, thereby completing the precise calibration of the temperature switch.

[0086] In a specific embodiment, the platform sets the heating value to the set temperature value T. If the captured actuation temperature value is less than T, it indicates that the temperature setting screw of the temperature switch needs to be rotated clockwise. The platform sends a clockwise rotation signal to the temperature switch adjustment platform, and the temperature switch platform rotates the screw. When the switch actuation is captured, the rotation signal is stopped. If the captured actuation temperature value is greater than T, the screw is rotated counterclockwise using a similar method.

[0087] In another specific embodiment, assume that the set actuation temperature of the temperature switch is 50 °C and the dead band is 3 °C. During the calibration process, it is found that the actuation value of the temperature switch is accurate, but during the temperature drop process, the actual dead band value is 5 °C, that is, the switch does not resume closing until the temperature drops to 45 °C. The actual dead band value is 5 °C, the preset dead band value is 3 °C, and the dead band deviation is 2 °C. The controller sends a counterclockwise rotation signal to the temperature switch adjustment platform to adjust the dead band screw. The temperature switch platform rotates the dead band screw counterclockwise until the switch closing is captured, and then stops sending the rotation signal. Reheat and verify the dead band value of the temperature switch. If the dead band value is still greater than 3 °C, continue to finely adjust the dead band screw counterclockwise until the dead band value meets the preset requirements.

[0088] After the screw rotation adjustment is completed, it will be reheated to verify whether the position of the screw is correct. If there is an error, the screw will be finely adjusted clockwise or counterclockwise by comparing the operating temperature with the set temperature value, and then the cooling and heating will be repeated to detect the switch until the action value and the hysteresis of the temperature switch meet the set requirements within the accuracy requirements range, indicating that the screw position corresponds to the set temperature value and the calibration work is completed.

[0089] Further, the heating device 30 further includes a heating module 32 and a cooling module 33;

[0090] The method further includes:

[0091] Adjust the heating module 32 or the cooling module 33 according to the current temperature and the preset temperature to make the medium of the heating device 30 constant at the preset temperature.

[0092] In a specific embodiment, in the full-automatic calibration method of this temperature switch, the heating device 30 plays a crucial role, and its internal integrates a heating module 32 and a cooling module 33. During the actual calibration process, it is first necessary to adjust the working state of the heating module 32 or the cooling module 33 according to the current temperature and the preset temperature. Specifically, when the current temperature is lower than the preset temperature, the control system will start the heating module 32 to make it start working, transfer heat to the medium in the heating device 30, and promote the medium temperature to gradually rise; on the contrary, when the current temperature is higher than the preset temperature, the control system will start the cooling module 33 to reduce the temperature of the medium through refrigeration. Through this intelligent adjustment mechanism, the heating device 30 can ensure that the temperature of its internal medium always remains at the preset temperature, providing a stable and accurate temperature environment for the calibration of the pressure type temperature switch, thereby ensuring the accuracy and reliability of the calibration result.

[0093] Further, the adjusting device 40 includes a fixed-value adjusting device 41 and / or a hysteresis adjusting device 42 respectively connected to the control device 20;

[0094] Step S1 includes:

[0095] Set the initial fixed-value threshold of the fixed-value adjusting device 41 and / or the initial hysteresis threshold of the hysteresis adjusting device 42 based on the temperature adjustment instruction;

[0096] Step S3 includes:

[0097] Adjust the initial fixed-value threshold and / or the initial hysteresis threshold according to the current temperature, the preset temperature and the switch information.

[0098] In a specific embodiment, in the full-automatic calibration method of the temperature switch of the present invention, the adjusting device 40 includes a fixed-value adjusting device 41 and / or a hysteresis adjusting device 42 respectively connected to the control device 20. In step S1, based on the temperature adjustment instruction, the initial fixed-value threshold of the fixed-value adjusting device 41 and / or the initial hysteresis threshold of the hysteresis adjusting device 42 are set. Specifically, the control device 20 sends a setting signal to the fixed-value adjusting device 41 and / or the hysteresis adjusting device 42 according to the temperature adjustment instruction, so that its initial fixed-value threshold and / or initial hysteresis threshold match the temperature adjustment instruction. In step S3, the initial fixed-value threshold and / or the initial hysteresis threshold are adjusted according to the current temperature, the preset temperature and the switch information. The control device 20 monitors the current temperature and the switch information in real time, compares them with the preset temperature, and automatically adjusts the fixed-value threshold of the fixed-value adjusting device 41 and / or the hysteresis threshold of the hysteresis adjusting device 42 according to the comparison result, so as to ensure that the action value and the hysteresis value of the temperature switch under different temperature conditions meet the preset requirements.

[0099] Further, adjusting the medium temperature in the heating device 30 to the preset temperature according to the temperature adjustment instruction includes:

[0100] Adjusting the medium temperature in the heating device 30 to the preset temperature at a preset temperature rate according to the temperature adjustment instruction. Specifically, in order to ensure that the temperature change process is stable and controllable, the system sets a lower heating rate limit value to avoid the adverse impact of too fast temperature change on the performance of the temperature switch.

[0101] Compared with the prior art, this technology has the following beneficial effects;

[0102] 1. The overhaul and calibration of the temperature switch can be realized fully automatically.

[0103] 2. The overhaul process is accelerated, and a large amount of overhaul time is saved.

[0104] 3. The overhaul preparation work and adjustment strategy of the temperature switch can be optimized, the overhaul quality of the temperature switch can be improved and unified.

[0105] A calibration report can be output to realize the collation and display of calibration data.

[0106] It should be understood that the above embodiments only represent the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, by freely combining the above technical features, several deformations and improvements are also made, and these all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A fully automatic temperature switch calibration system, comprising a pressure-type temperature switch to be tested, characterized in that: The verification system also includes a control device, a heating device and an adjustment device; The control device is used to adjust the medium in the heating device to a preset temperature according to the temperature adjustment instruction; The pressure-type temperature switch to be tested senses the temperature change of the medium in the heating device and outputs switch information; The heating device is provided with a temperature measuring device for obtaining the current temperature of the medium; The control device is connected to the pressure-type temperature switch to be measured and the temperature measuring device, and is used to obtain the switch information and the current temperature; The control device is also used to calibrate the pressure-type temperature switch to be tested through the adjustment device according to the preset temperature, the current temperature and the switch information.

2. The temperature switch fully automatic calibration system according to claim 1 is characterized in that: The heating device also includes a heating module and a cooling module; The control device is connected to the heating module and the cooling module respectively, and is used to adjust the operation of the heating module or the cooling module according to the current temperature and the preset temperature so that the medium of the heating device is kept constant at the preset temperature.

3. The temperature switch fully automatic calibration system according to claim 1 is characterized in that: The pressure-type temperature switch to be tested includes a force balancing device, a pressure conducting device and a micro switch device; the regulating device includes a fixed value regulating device and / or a hysteresis regulating device; One end of the pressure transmission device is arranged in the heating device, and the other end of the pressure transmission device is arranged at the input end of the force balancing device, and is used to sense the temperature change of the heating device and convert it into pressure change to transmit to the force balancing device, and the micro switch device is arranged at the output end of the force balancing device; The control device is connected to the fixed value end of the force balancing device through the fixed value adjustment device, and is used to adjust the initial fixed value threshold of the fixed value adjustment device according to the temperature adjustment instruction, and also calibrate the initial fixed value threshold according to the current temperature, the preset temperature and the switch information; And / or, the control device is connected to the hysteresis end of the force balancing device through the hysteresis adjustment device, and is used to adjust the initial hysteresis threshold of the hysteresis adjustment device according to the temperature adjustment instruction, and also calibrate the initial hysteresis threshold according to the current temperature, the preset temperature and the switch information.

4. The temperature switch fully automatic calibration system according to claim 3, characterized in that: The input end of the force balancing device and the output end of the force balancing device are arranged on both sides of the same end; The regulating end of the force balancing device and the hysteresis end of the force balancing device are arranged at the other end opposite to the input end of the force balancing device.

5. The temperature switch fully automatic calibration system according to claim 4, characterized in that: The fixed value adjustment device includes a first motor device, a first screw, a first nut and a first elastic element; the backlash adjustment device includes a second motor device, a second screw, a second nut and a second elastic element; The first motor is connected to one end of the first elastic element through the first screw, the first nut is arranged on the first screw, and the other end of the first elastic element is connected to the fixed value adjustment end; The second motor is connected to one end of the second elastic element through the second screw rod, the second nut is arranged on the second screw rod, and the other end of the second elastic element is connected to the backlash adjustment end.

6. The temperature switch fully automatic calibration system according to claim 5, characterized in that: The control device regulates the first electric machine and / or the second electric machine by means of pulse width modulation.

7. A fully automatic temperature switch calibration method, characterized in that: The fully automatic calibration system for a temperature switch according to any one of claims 1 to 6, characterized in that the method comprises the following steps: Step S1: obtaining a temperature adjustment instruction, and adjusting the temperature of the medium in the heating device to a preset temperature according to the temperature adjustment instruction; Step S2: obtaining current temperature information of the heating device and switch information of the pressure-type temperature switch; Step S3: controlling the regulating device to calibrate the pressure temperature switch according to the current temperature, the preset temperature and the switch information.

8. The fully automatic calibration method for a temperature switch according to claim 7, characterized in that: The heating device also includes a heating module and a cooling module; The method further comprises: The heating module or the cooling module is adjusted to work according to the current temperature and the preset temperature so that the medium of the heating device is kept at the preset temperature.

9. The fully automatic temperature switch calibration method according to claim 7, characterized in that: The regulating device comprises a fixed value regulating device and / or a hysteresis regulating device respectively connected to the control device; The step S1 comprises: Setting an initial fixed value threshold of the fixed value adjustment device and / or an initial hysteresis threshold of the hysteresis adjustment device based on the temperature adjustment instruction; The step S3 comprises: The initial set value threshold and / or the initial hysteresis threshold are adjusted according to the current temperature, the preset temperature and the switch information.

10. The fully automatic calibration method for a temperature switch according to claim 9, characterized in that: The step of adjusting the temperature of the medium in the heating device to a preset temperature according to the temperature adjustment instruction comprises: The temperature of the medium in the heating device is adjusted to a preset temperature at a preset temperature rate according to the temperature adjustment instruction.

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