A mobile remote in-situ temperature calibration device and method based on 5G

Abstract

The present invention discloses a mobile remote in-situ temperature calibration device and method based on 5G. The device includes a drawbar box, in which a constant temperature module, an interface module, a control module, an industrial camera and a storage box are arranged. This mobile remote in-situ temperature calibration device based on 5G is integrated into the drawbar box, which is convenient for carrying and transferring; each group of constant temperature boxes starts preheating or cooling at the same time, and the temperature sensor to be calibrated is rotated in the constant temperature boxes at different temperature points by grasping the temperature sensor to be calibrated by a manipulator, so as to realize the rapid calibration of the temperature sensor; the interface types of the temperature sensor to be calibrated are expanded to meet the calibration requirements of different temperature sensors; the calibration data is uploaded and stored through the Internet, and the remote collaborative operation of the calibration device and the supervision of the calibration process are realized in combination with the industrial camera.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature sensor calibration, and in particular to a 5G-based mobile remote in-situ temperature calibration device and method. Background Art

[0002] Calibrating temperature sensors is the key to ensuring the accuracy and reliability of temperature measurement. The conventional calibration method is to generate a uniform, stable, accurate and reliable temperature field through a standard temperature source, then place the calibrated temperature sensor and the standard temperature sensor into the standard temperature source, measure the temperature values ​​of multiple calibration points respectively and compare them, and then get the calibration result.

[0003] In the past, the qualification of temperature sensors was determined by calculating the indication error between the calibrated temperature sensor and the standard temperature sensor, and then checking whether the difference was within the qualified range of the calibrated temperature sensor. This determination method used the value of the standard temperature sensor as the true value. However, in actual situations, this value is only approximate to the true value. Due to the influence of factors such as manufacturing process and circuit design, temperature sensors will inevitably have certain measurement errors. If it is directly used as the true value during measurement, the error will be introduced into the calibration result.

[0004] Currently, portable temperature sensor calibration devices are widely popular in the market, and most of them use dry body furnaces and heat blocks to provide a constant temperature field. Due to the limitations of the heat block structure, this type of calibration device is usually only suitable for temperature sensors with long rod probes. Conventional temperature calibration devices only have one constant temperature field, and the temperature control system controls the temperature field to increase or decrease in temperature to reach each temperature calibration point. The temperature change from one calibration point to the next is often fast at first, then slow, and finally stabilizes at the calibration point. If the temperature is changed to multiple calibration points in sequence in a constant temperature field for temperature measurement, this process takes a long time and the calibration efficiency is low. Summary of the invention

[0005] In view of the above shortcomings, the present invention provides a 5G-based mobile remote in-situ temperature calibration device and method.

[0006] In a first aspect, the present invention provides a 5G-based mobile remote in-situ temperature calibration device, comprising a portable box, wherein a constant temperature module, an interface module, a transfer module and a 5G communication module are arranged in the portable box;

[0007] The constant temperature module is used to provide a variety of constant temperature fields;

[0008] The interface module is used to electrically connect to the temperature sensor to be calibrated, and expand the interface types of the temperature sensor to be calibrated to meet the calibration requirements of different temperature sensors;

[0009] The transfer module is used to rotate the calibrated temperature sensor in multiple constant temperature fields of the constant temperature module, thereby realizing rapid calibration at different temperature points;

[0010] The 5G communication module is used to upload the measurement and analysis results of the temperature points to the backend of a third-party calibration agency;

[0011] In the fast calibration of different temperature points, The difference between the temperature value measured by the calibrated temperature sensor and the temperature value measured by the standard temperature sensor. When the difference is measured multiple times and the average is calculated, it is still impossible to determine whether the calibrated temperature sensor is qualified at a certain temperature point. Then, the judgment anchor point is introduced, and the average value calculated by multiple measurements of the difference is calculated. Comparison is used to determine whether the calibrated temperature sensor is qualified at a certain temperature point.

[0012] In a second aspect, the present invention provides a 5G-based mobile remote in-situ temperature calibration method, using the above-mentioned device, including:

[0013] Place the calibrated temperature sensor into the constant temperature module through the transfer module;

[0014] Obtain the temperature value measured by the calibrated temperature sensor and the temperature value measured by the standard temperature sensor;

[0015] Determine whether the calibrated temperature sensor is qualified at a certain temperature point according to the rules;

[0016] After the measurement at this temperature point is completed, the transfer module is used to switch to the next constant temperature field, and the above operation is continued until all calibration temperature points are traversed.

[0017] The present invention has the following beneficial effects: during calibration, the present invention simultaneously starts preheating or cooling each group of thermostats, and rotates the calibrated temperature sensor in the thermostats at different temperature calibration points by grasping the calibrated temperature sensor by a manipulator, thereby realizing rapid calibration of the temperature sensor and improving calibration efficiency; the present invention also expands the types of interfaces of the calibrated temperature sensor, and generates a constant temperature field by heating or cooling dry air to meet the calibration requirements of temperature sensors with different interfaces and different probe shapes; further, the present invention also takes into account the measurement errors existing in the standard temperature sensor itself, optimizes the method for judging whether the calibrated temperature sensor is qualified, and makes the calibration result more accurate and reliable; the uploading and storage of calibration data is realized through the Internet, and the remote collaborative operation of the calibration device and the supervision of the calibration process are realized in combination with an industrial camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0019] Figure 2It is a cross-sectional view of the low temperature constant temperature box of the device of the present invention;

[0020] Figure 3 It is a cross-sectional view of the medium-temperature thermostat of the device of the present invention;

[0021] Figure 4 The hardware structure diagram of the device of the present invention;

[0022] Reference numerals:

[0023] 10 pull rod box, 20 low temperature constant temperature box, 21 medium temperature constant temperature box, 22 lifting rod, 23 horizontal turntable, 24 manipulator, 30 calibration device power interface, 31 three-wire interface, 32 two-wire interface, 33USB interface, 34RS485 interface, 35RS232 interface, 40 start button, 41 close button, 42 controller, 50 industrial camera, 60 storage box, 201 low temperature constant temperature box constant temperature layer, 202 low temperature constant temperature box insulation layer, 203 low temperature constant temperature box vacuum layer, 204 standard temperature sensor, 205 thermoelectric refrigeration module, 206 guide fan, 211 medium temperature constant temperature box constant temperature layer, 212 medium temperature constant temperature layer heating layer, 213 medium temperature constant temperature layer insulation layer, 214 medium temperature constant temperature layer vacuum layer. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 An embodiment of the present application provides a 5G-based mobile remote in-situ temperature calibration device, including a pull rod box 10 (i.e., a portable box in the present application), in which a constant temperature module, an interface module, a control module, an industrial camera 50 (i.e., an image acquisition unit in the present application) and a storage box 60 are provided.

[0026] The constant temperature module is provided with two groups of constant temperature boxes and a manipulator lifting device (i.e., the transfer module in this application). The constant temperature boxes are arranged in groups of three on the left, which are medium-temperature constant temperature boxes 21, and in groups of three on the right, which are low-temperature constant temperature boxes 20.

[0027] The thermostat generates a constant temperature field by heating or cooling dry air. Dry air is easier to carry than liquids and can be applied to sensor probes of different shapes compared to metal thermostat blocks.

[0028] In a preferred embodiment, if Figure 2As shown, the low-temperature constant temperature box 20 is set to three layers, which are a constant temperature layer 201, an insulation layer 202, and a vacuum layer 203 from the inside to the outside. The constant temperature layer 201 of the low-temperature constant temperature box 20 is installed with a standard temperature sensor 204, a thermoelectric cooling module 205 and a guide fan 206.

[0029] In a preferred embodiment, if Figure 3 As shown, the medium temperature constant temperature box 21 is set to 4 layers, which are a constant temperature layer 211, a heating layer 212, an insulation layer 213, and a vacuum layer 214 from the inside to the outside. The constant temperature layer 211 of the medium temperature constant temperature box 21 is equipped with a guide fan 206 and a standard temperature sensor 204.

[0030] Furthermore, the material used for the thermal insulation layer of the thermostat is silica aerogel, which has excellent thermal insulation performance at -200°C to 1500°C and is the material with the best thermal insulation performance so far.

[0031] Furthermore, the thermoelectric material used in the thermoelectric cooling module is bismuth telluride, and the structure is a plurality of semiconductor thermocouple pairs arranged in two rows, and this structure can better exert the cooling effect of bismuth telluride.

[0032] Furthermore, the low temperature thermostat can be set to a calibrated temperature range of -45°C to 140°C, the medium temperature thermostat can be set to a calibrated temperature range of 30°C to 700°C, and the calibrated temperature range of the entire device is -45°C to 700°C. The low temperature or medium temperature sensor can be calibrated separately or in combination, which expands the temperature calibration range of the entire device and improves versatility.

[0033] In a preferred embodiment, the manipulator lifting device is provided with a lifting rod 22, a horizontal turntable 23 and a manipulator 24; the interface module is provided with a calibration device power interface 30 and a calibrated temperature sensor interface, which are respectively arranged on both sides of the constant temperature module.

[0034] Further, see Figure 1 The calibrated temperature sensor interface includes two three-wire interfaces 31, one two-wire interface 32, two USB interfaces 33, one RS485 interface 34, and one RS232 interface 35; the control module is provided with a start button 40, a close button 41, and a controller 42 with a touch screen; the industrial camera 50 is installed inside the cover of the pull rod box; the storage box 60 is arranged on the right side of the controller 42. The electrical signal transmission relationship of various hardware circuits can be seen in Figure 4 .

[0035] When the calibration device is in use, the start button 40 is pressed, the lifting rod 22 drives the manipulator 24 to rise, the constant temperature box starts to preheat or cool, reaches and stabilizes at the temperature calibration point, and at the same time the industrial camera 50 starts to remotely transmit real-time images to a third-party calibration agency. The manipulator 24 clamps the temperature sensor to be calibrated, the horizontal turntable 23 drives the manipulator 24 to rotate and aim at the target constant temperature box, the manipulator 24 descends, the sensor is placed in the target constant temperature box, and then the temperature calibration test is performed.

[0036] This application integrates a 5G-based mobile remote in-situ temperature calibration device into a trolley case for easy carrying and transfer; starts preheating or cooling each set of constant temperature boxes at the same time, and uses a robot to grasp the calibrated temperature sensor and rotate it in the constant temperature boxes at different temperature points, thereby achieving rapid calibration of the temperature sensor and improving calibration efficiency; expands the interface types of the calibrated temperature sensor to meet the calibration requirements of different temperature sensors; realizes the upload and storage of calibration data through the Internet, and combines with industrial cameras to realize remote collaborative operation of the calibration device and supervision of the calibration process.

[0037] The embodiment of the present application also provides a 5G-based mobile remote in-situ temperature calibration method, which specifically includes:

[0038] First, clarify the tolerance range of the temperature sensor to be calibrated , the tolerance range of standard temperature sensors .

[0039] Secondly, at the same time point, obtain the temperature value measured by the calibrated temperature sensor , the temperature value measured by the standard temperature sensor .

[0040] Then, according to the rules, it is determined whether the calibrated temperature sensor is qualified at a certain temperature point;

[0041] Finally, after the temperature point is measured, the lifting rod 22 drives the manipulator 24 holding the calibrated temperature sensor to rise, rotates the horizontal turntable 23, aligns with the next target constant temperature box, and continues the above operation until all calibration temperature points are traversed.

[0042] Furthermore, in some embodiments, the measurement and analysis results of each temperature point are displayed on the touch screen in the form of a chart and a broken line, and uploaded to the backend of a third-party calibration agency via a 5G network (implemented by the 5G communication module in this application). After the calibration work is completed, an electronic calibration certificate is provided to the customer, who can scan the QR code on the display to download it.

[0043] Further, in some embodiments, the determining whether the calibrated temperature sensor is qualified at a certain temperature point according to the rule is specifically:

[0044] calculate ;

[0045] like , then the calibrated temperature sensor is judged to be qualified at this temperature point;

[0046] like or , then the calibrated temperature sensor is judged to be unqualified at this temperature point;

[0047] Furthermore, when or When, yes Calculate the average value after multiple measurements .like , then the calibrated temperature sensor is judged to be qualified at this temperature point; if or , then the calibrated temperature sensor is judged to be unqualified at this temperature point.

[0048] Furthermore, if you still meet or , then the threshold τ obtained from repeated experiments under different temperature conditions in the laboratory is used as the discrimination anchor point. , then the calibrated temperature sensor is judged to be qualified at this temperature point. , then the calibrated temperature sensor is judged to be unqualified at this temperature point.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 5G-based mobile remote in-situ temperature calibration device, comprising a portable box, characterized in that: The portable box is provided with a constant temperature module, an interface module, a transfer module and a 5G communication module; The constant temperature module is used to provide a variety of constant temperature fields; The interface module is used to electrically connect to the temperature sensor to be calibrated, and expand the interface types of the temperature sensor to be calibrated to meet the calibration requirements of different temperature sensors; The transfer module is used to rotate the calibrated temperature sensor in multiple constant temperature fields of the constant temperature module, thereby realizing rapid calibration at different temperature points; The 5G communication module is used to upload the measurement and analysis results of the temperature points to the backend of a third-party calibration agency; In the fast calibration of different temperature points, it is assumed that The difference between the temperature value measured by the calibrated temperature sensor and the temperature value measured by the standard temperature sensor. When the difference is measured multiple times and the average is calculated, it is still impossible to determine whether the calibrated temperature sensor is qualified at a certain temperature point. Then, the judgment anchor point is introduced, and the average value calculated by the judgment anchor point and the difference is calculated multiple times. Comparison is used to determine whether the calibrated temperature sensor is qualified at a certain temperature point, specifically: ； Case 1: If , then the calibrated temperature sensor is determined to be qualified; Case 2: If or , then the calibrated temperature sensor is judged to be unqualified; in is the temperature value measured by the calibrated temperature sensor, The temperature value measured by the standard temperature sensor, is the tolerance range of the calibrated temperature sensor, is the tolerance range of the standard temperature sensor; like or , then Calculate the average value after multiple measurements ; like , then the calibrated temperature sensor is determined to be qualified; like or , then the calibrated temperature sensor is judged to be unqualified; like or , then the threshold value obtained by repeated experiments under different temperature conditions in the laboratory As a discriminant anchor point, if , then the calibrated temperature sensor is considered qualified. , then the calibrated temperature sensor is judged to be unqualified.

2. The 5G-based mobile remote in-situ temperature calibration device according to claim 1, characterized in that: It also includes an image acquisition unit for realizing remote collaborative operation of the calibration device and supervision of the calibration process.

3. The 5G-based mobile remote in-situ temperature calibration device according to claim 1, characterized in that: The constant temperature module generates a constant temperature field by heating or cooling dry air; it includes a plurality of low-temperature constant temperature boxes and medium-temperature constant temperature boxes; wherein the low-temperature constant temperature box is set to have a calibrable temperature range of -45°C to 140°C, and the medium-temperature constant temperature box is set to have a calibrable temperature range of 30°C to 700°C.

4. The 5G-based mobile remote in-situ temperature calibration device according to claim 3, characterized in that: The low temperature constant temperature box has a three-layer structure, which includes a constant temperature layer, a heat preservation layer, and a vacuum layer from the inside to the outside; the constant temperature layer of the low temperature constant temperature box is equipped with a standard temperature sensor, a thermoelectric cooling module, and a guide fan.

5. The 5G-based mobile remote in-situ temperature calibration device according to claim 3, characterized in that: The medium-temperature thermostatic box is configured as a four-layer structure, which includes a constant temperature layer, a heating layer, a heat preservation layer, and a vacuum layer from the inside to the outside. The constant temperature layer of the medium-temperature thermostatic box is equipped with a guide fan and a standard temperature sensor.

6. A 5G-based mobile remote in-situ temperature calibration method, using the device described in any one of claims 1 to 5, characterized in that: Place the calibrated temperature sensor into the constant temperature module through the transfer module; Obtain the temperature value measured by the calibrated temperature sensor and the temperature value measured by the standard temperature sensor; Determine whether the calibrated temperature sensor is qualified at a certain temperature point according to the rules; After the measurement at this temperature point is completed, the transfer module is used to switch to the next constant temperature field, and the above operation is continued until all calibration temperature points are traversed.

7. The 5G-based mobile remote in-situ temperature calibration method according to claim 6, characterized in that: It also includes displaying the measurement and analysis results of each temperature point in the form of graphs and broken lines on the touch screen, and uploading them to the backend of a third-party calibration agency via the 5G network.

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