Calibration method and device of wireless temperature recorder, equipment and storage medium

Abstract

The invention provides a calibration method, device and equipment for a wireless temperature recorder and a storage medium, a calibration environment is constructed and used for simulating a real use scene of the wireless temperature recorder, and in the calibration environment, an indicating value of the wireless temperature recorder and an indicating value of a standard thermometer meet a preset function relationship. The calibration environment comprises that the temperature equalizing body is arranged in the quasi-adiabatic space; a standard thermometer and at least one wireless temperature recorder to be calibrated are installed on the temperature equalizing body; the whole calibration environment is placed in a low-temperature constant-temperature box, and the low-temperature constant-temperature box is controlled to normally work at the preset low-temperature calibration temperature; the temperature measurement value of the standard thermometer is monitored, and when the change rate is lower than a set threshold value, the temperature indication value of the wireless temperature recorder to be calibrated is obtained; and determining an indicating value error or a calibration coefficient of the wireless temperature recorder to be calibrated based on the temperature measurement value and the temperature indicating value. By adopting the method, the accuracy, normalization and practicability of the calibration result can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of temperature measurement equipment calibration technology, and more specifically, to a calibration method, apparatus, device, and storage medium for a wireless temperature recorder. Background Technology

[0002] Wireless temperature sensor recorders have been widely used in key areas such as cold chain transportation on ships, cold storage, preservation of biopharmaceuticals, laboratory environmental monitoring, and status management of shipboard electromechanical equipment. They can collect and record temperature data in real time, providing core support for ensuring the quality of temperature-controlled goods and providing early warning of equipment failures. These recorders consist of sensor components, measurement circuits, storage / wireless transmission modules, and power batteries. Because the sensors are difficult to disassemble and the measurement circuits are temperature-dependent, the industry generally adopts a whole-unit calibration mode to ensure that the calibration results accurately reflect actual usage scenarios.

[0003] In existing technologies, the calibration of wireless temperature sensor recorders is mostly carried out by human experience in a conventional constant temperature environment. The specific operation method is as follows: in a conventional constant temperature experimental environment such as a constant temperature chamber, the staff sets the relevant calibration conditions based on past experience, places the standard thermometer and the wireless temperature recorder to be calibrated, judges whether thermal equilibrium has been reached by subjective feeling, and then reads the readings of the standard thermometer and the wireless temperature recorder to be calibrated and compares and calculates to complete the calibration process.

[0004] The existing technology has significant drawbacks: conventional experimental environments such as constant temperature chambers are constrained by the temperature control principle, resulting in poor temperature stability and large temperature fluctuations. In addition, the low specific heat capacity of air leads to a lack of consistency between the measurement environment of the standard thermometer and the wireless temperature recorder to be calibrated, making it impossible to establish a stable functional relationship between their readings. The determination of thermal balance relies on the experience and subjective judgment of the staff. Therefore, the accuracy and repeatability of the calibration results are extremely poor, making it difficult to meet the industry's requirements for the standardization and precision of temperature monitoring equipment calibration. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a calibration method, apparatus, device and storage medium for a wireless temperature recorder, which can effectively improve the accuracy, standardization and practicality of calibration results.

[0006] In a first aspect, embodiments of this application provide a calibration method for a wireless temperature recorder, the method comprising: A calibration environment is constructed, wherein the calibration environment is used to simulate the real-world use scenario of the wireless temperature recorder, and the readings of the wireless temperature recorder and the standard thermometer satisfy a preset functional relationship in the calibration environment. The calibration environment includes a homogenizing body made of a material with high thermal conductivity, and the homogenizing body is set in a quasi-insulated space. A standard thermometer and at least one wireless temperature recorder to be calibrated are mounted on the temperature equalization body, and the temperature sensing probe of the wireless temperature recorder to be calibrated is surrounded by the material of the temperature equalization body. The entire calibration environment is placed in a low-temperature constant temperature chamber, and the low-temperature constant temperature chamber is controlled to work normally at the preset low-temperature calibration temperature. The temperature measurement value of the standard thermometer is monitored. When the rate of change of the thermometer measurement value is lower than a first set threshold, it is determined that the isothermal body and the area surrounding the temperature sensing probe form a stable isothermal air environment. In the isothermal air environment, the temperature reading of the wireless temperature recorder to be calibrated is acquired; Based on the temperature measurement value of the standard thermometer and the temperature reading value of the wireless temperature recorder to be calibrated, the reading error or calibration coefficient of the wireless temperature recorder to be calibrated is determined.

[0007] Optionally, the wireless temperature recorder to be calibrated is mounted on the temperature equalization body, and the temperature sensing probe of the wireless temperature recorder to be calibrated is surrounded by the temperature equalization body material, including: The temperature sensor is inserted into the pre-set calibration installation space on the temperature equalization body, so that an annular quasi-sealed air gap is formed between the wall of the calibration installation space and the outer surface of the temperature sensor.

[0008] Optionally, the first set threshold is: The reading of the standard thermometer changes by less than 0.01 degrees Celsius over a continuous ten-minute period.

[0009] Optionally, based on the temperature measurement value of the standard thermometer and the temperature indication value of the wireless temperature recorder to be calibrated, the indication error or calibration coefficient of the wireless temperature recorder to be calibrated is determined, including: The reference temperature value is determined based on the temperature measurement value of the standard thermometer; The indication error or the calibration coefficient is determined based on the temperature reading and the reference temperature value.

[0010] Optionally, determining the indication error or the calibration coefficient based on the temperature indication and the reference temperature value includes: Subtracting the temperature reading from the reference temperature value yields the reading error of the wireless temperature recorder to be calibrated at the low-temperature calibration temperature. Alternatively, based on the difference between the temperature reading and the reference temperature value, a calibration coefficient for correcting the measurement results of the wireless temperature recorder to be calibrated can be determined using a preset fitting function.

[0011] Secondly, embodiments of this application provide a calibration apparatus for a wireless temperature recorder, the apparatus being used to implement the calibration method for a wireless temperature recorder described in any optional embodiment of the first aspect above, the apparatus comprising: cryogenic incubator; The multi-layer temperature screens installed inside the low-temperature constant temperature chamber form a quasi-insulated space. The temperature equalization body is disposed in the quasi-insulated space, wherein the temperature equalization body is made of a metal material with high thermal conductivity, and the temperature equalization body is provided with a standard instrument mounting space for mounting a standard thermometer, and at least one cylindrical calibration space for mounting a temperature sensing probe of a wireless temperature recorder to be calibrated.

[0012] Optionally, the multi-layer temperature shield has three layers, and the temperature equalization body is set in the quasi-insulated space enclosed by the multi-layer temperature shield through an insulating support, and has no direct thermal conduction connection with the multi-layer temperature shield.

[0013] Optionally, the temperature equalization body is made of oxygen-free copper, is cylindrical, has a diameter of not less than 150 mm, and a mass of not less than 12 kg; The calibration device is configured such that, when the low-temperature constant temperature chamber is in calibration condition at -80 ℃, the temperature uniformity of the temperature equalization body within a diameter of 150 mm is better than 0.05 ℃, and the temperature change rate is better than 0.01 ℃ per 10 minutes.

[0014] Thirdly, embodiments of this application provide a computer device, including: a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the computer device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, the steps of the calibration method for the wireless temperature recorder described in any of the optional embodiments of the first aspect are performed.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the calibration method for a wireless temperature recorder described in any of the optional embodiments of the first aspect.

[0016] The technical solution provided in this application includes, but is not limited to, the following beneficial effects: Constructing a calibration environment that includes a homogenizing body made of high thermal conductivity materials and a quasi-insulated space allows the temperature of the homogenizing body to quickly become uniform by leveraging the properties of the high thermal conductivity materials. At the same time, the quasi-insulated space isolates the body from temperature interference from the external environment, laying a stable environmental foundation for subsequent accurate calibration and ensuring that the calibration process is not affected by external temperature fluctuations.

[0017] The standard thermometer and the wireless temperature recorder to be calibrated are mounted on the temperature equalization body, and the temperature sensing probe is surrounded by the temperature equalization body material. This ensures that the detector of the wireless temperature recorder to be calibrated is in a stable and uniform air environment, thus restoring its real working environment. It also ensures that the standard thermometer and the recorder to be calibrated are in the same uniform temperature field, avoiding the deviation in the comparison of the readings caused by the inconsistency of the ambient temperature between the two, and providing the prerequisite for establishing a stable reading function relationship.

[0018] Placing the entire calibration environment in a low-temperature constant temperature chamber and maintaining the set low temperature can accurately simulate the low-temperature working scenario in the actual application of wireless temperature recorders, making the calibration results more consistent with the real usage conditions. This ensures that the calibrated recorder can still maintain measurement accuracy under actual low-temperature conditions, thus improving the practicality of the calibration.

[0019] The rate of change of the measured value of the monitoring standard thermometer is used as the stability criterion, avoiding the error of subjective judgment of thermal equilibrium state. The objective and quantitative standard ensures the stability of the isothermal air environment, provides a clear basis for judging the accuracy of the calibration results, and reduces the calibration deviation caused by the instability of the ambient temperature.

[0020] Acquiring the temperature readings of the recorder to be calibrated in a stable isothermal air environment ensures that the collected readings accurately reflect the recorder's actual measurement capabilities under those temperature conditions. This avoids interference from environmental fluctuations or inconsistencies, providing reliable raw data for subsequent calculations of reading errors or calibration coefficients.

[0021] Based on the measurement value of the standard thermometer and the temperature reading of the recorder to be calibrated, the indication error or calibration coefficient is determined. This can directly quantify the measurement deviation of the recorder to be calibrated or provide a precise basis for correction, so that the measurement accuracy of the recorder is significantly improved after calibration, meeting the industry's requirements for standardization and precision of temperature monitoring equipment.

[0022] The calibration method described in this application, through the orderly advancement of each step, forms a complete calibration process, from the construction of a precision calibration environment, equipment installation, temperature control, status determination, data acquisition to result calculation. Each step is closely integrated, ensuring calibration quality in terms of environmental stability, measurement consistency, scenario suitability, objectivity of criteria, data reliability, and result validity. Ultimately, it achieves accurate calibration of the wireless temperature recorder, effectively improving the accuracy, standardization, and practicality of the calibration results, and meeting the industry's core requirements for the calibration of temperature monitoring equipment.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A flowchart of a calibration method for a wireless temperature recorder provided in Embodiment 1 of this application is shown; Figure 2 A flowchart illustrating a specific calibration method for a wireless temperature recorder provided in Embodiment 1 of this application is shown; Figure 3 This paper shows a schematic diagram of the structure of a calibration device for a wireless temperature recorder provided in Embodiment 2 of this application; Figure 4 A schematic diagram of the structure of a computer device provided in Embodiment 3 of this application is shown. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] Example 1 To facilitate understanding of this application, the following is combined with... Figure 1 The flowchart illustrating the calibration method for a wireless temperature recorder provided in Embodiment 1 of this application provides a detailed description of Embodiment 1 of this application.

[0028] See Figure 1 As shown, Figure 1 A flowchart of a calibration method for a wireless temperature recorder provided in Embodiment 1 of this application is shown, wherein the method includes steps S101 to S106: S101: Construct a calibration environment, wherein the calibration environment is used to simulate the real-world use scenario of the wireless temperature recorder, and the readings of the wireless temperature recorder and the standard thermometer satisfy a preset functional relationship in the calibration environment. The calibration environment includes a temperature homogenizing body made of a material with high thermal conductivity, and the temperature homogenizing body is disposed in a quasi-insulated space.

[0029] Specifically, the high thermal conductivity material is preferably oxygen-free copper (density 8.9 g / cm³), whose high thermal conductivity allows the internal temperature of the homogenizing body to quickly become uniform, eliminating temperature gradients. The quasi-insulated space is enclosed by multiple layers of temperature shields (preferably three layers), with insulation material or air filling between the layers. Its core function is to isolate the heat exchange between the external environment and the homogenizing body, reducing the interference of external temperature fluctuations on the internal environment and providing a foundation for establishing a stable functional relationship. This calibration environment simulates the air medium measurement scenario in the actual application of the wireless temperature recorder, ensuring that the calibration results are consistent with the actual usage conditions. At the same time, through the collaborative design of the homogenizing body and the quasi-insulated space, the wireless temperature recorder and the standard thermometer are placed in the same uniform temperature field, meeting the preset functional relationship requirement for stable correlation between their readings.

[0030] S102: Install a standard thermometer and at least one wireless temperature recorder to be calibrated on the temperature equalization body, and surround the temperature sensing probe of the wireless temperature recorder to be calibrated with the material of the temperature equalization body.

[0031] Specifically, the standard thermometer is a sheathed platinum resistance thermometer. The main body of the temperature equalization body is a cylinder, and a standard installation space for the standard thermometer is provided at its central axis. The cylindrical calibration space of the wireless temperature recorder to be calibrated is arranged around the standard installation space, and the axes of the two are kept parallel without any special orientation or distance restrictions.

[0032] The uniform temperature body has a diameter of not less than 150 mm and a mass of not less than 12 kg. Its thermal performance meets the requirements of "thermal conductivity greater than 390 W / (m·℃) and heat capacity greater than 4.7 kJ / ℃". The large heat capacity design reduces the impact of ambient temperature fluctuations.

[0033] The temperature probe of the recorder to be calibrated must be fully inserted into the cylindrical mounting space of the temperature equalization body, with no part exposed, to ensure that the probe is surrounded by a stable air medium and to avoid external air interference.

[0034] S103: Place the entire calibration environment in a low-temperature constant temperature chamber and control the low-temperature constant temperature chamber to work normally at the preset low-temperature calibration temperature.

[0035] Specifically, the set low-temperature calibration temperature can be as low as -80 ℃. The three-layer temperature screen is placed directly and independently in the low-temperature constant temperature chamber. The temperature equalization body is set in the internal space enclosed by the temperature screen through the heat insulation support, and there is no direct heat conduction connection between it and the temperature screen. Neither the temperature screen nor the temperature equalization body requires additional temperature control.

[0036] This design does not require a complex temperature control structure. It only provides a basic low-temperature environment through a low-temperature constant temperature chamber. Combined with the heat insulation effect of the temperature shield and the large heat capacity of the isothermal body, a stable isothermal environment can be achieved.

[0037] S104: Monitor the temperature measurement value of the standard thermometer. When the rate of change of the temperature measurement value is lower than the first set threshold, determine that the isothermal body and the area surrounding the temperature sensing probe form a stable isothermal air environment.

[0038] Specifically, the first threshold is that the change in the standard thermometer measurement value within ten consecutive minutes is less than 0.01 degrees Celsius (°C). This value is better than the stability criterion required by the calibration specification. Only when this condition is met can the readings of the standard and the recorder to be calibrated have a stable functional relationship.

[0039] After stabilization, the temperature uniformity of the homogenized body within a 150 mm diameter range is better than 0.05 ℃, and the temperature change rate is better than 0.01 ℃ / 10 minutes, which completely solves the core defects of traditional low temperature constant temperature chambers, such as large temperature fluctuations and poor uniformity.

[0040] S105: Under the isothermal air environment, acquire the temperature reading of the wireless temperature recorder to be calibrated.

[0041] Specifically, the cylindrical mounting space for the temperature equalization body is a quasi-sealed small space adapted to the temperature sensing probe. Its design includes two key points: First, the geometry of the mounting space is fully matched with the sensor to ensure that the thickness of the isothermal air layer surrounding the sensor is consistent, reducing the temperature difference caused by air thermal resistance; Second, the shape of the opening of the mounting space matches the root of the recorder detector to reduce air convection interference.

[0042] The quasi-sealed small space is filled with air, which completely simulates the scenario in which the recorder to be calibrated uses air as the measurement medium in actual application, ensuring that the calibration environment is consistent with the real use environment.

[0043] S106: Based on the temperature measurement value of the standard thermometer and the temperature reading value of the wireless temperature recorder to be calibrated, determine the reading error or calibration coefficient of the wireless temperature recorder to be calibrated.

[0044] Specifically, this solution adopts a whole-machine calibration mode, which not only avoids the risks of leakage and damage in the calibration of the cryogenic liquid constant temperature bath, but also establishes a stable functional relationship between the standard and the recorder to be calibrated through a stable isothermal environment, thus solving the core pain point of the traditional method.

[0045] The value error is obtained by directly subtracting the temperature reading of the recorder to be calibrated from the reference temperature value. The calibration coefficient is calculated based on the difference between the two values ​​using a preset fitting function. This coefficient is used to correct subsequent measurement results and ensure the accuracy of data in practical applications.

[0046] In an optional implementation, the wireless temperature logger to be calibrated is mounted on the temperature homogenizing body, and the temperature sensing probe of the wireless temperature logger to be calibrated is surrounded by the temperature homogenizing body material, including: The temperature sensor is inserted into the pre-set calibration installation space on the temperature equalization body, so that an annular quasi-sealed air gap is formed between the wall of the calibration installation space and the outer surface of the temperature sensor.

[0047] Specifically, the calibration installation space is a cylindrical hole (not an independent chamber) integrally formed with the temperature-equalizing body. It is gap-fitted with the temperature probe and does not require a sealing ring. Through geometric adaptation, a quasi-sealed space is formed, which ensures the air medium environment and avoids measurement interference caused by direct contact between the probe and the wall surface.

[0048] This gap design, combined with the two key structural features of the quasi-enclosed small space, further ensures the uniformity of the air layer thickness and the convection suppression effect, providing a guarantee for the isothermal environment.

[0049] In an optional implementation, the first set threshold is: The reading of the standard thermometer changes by less than 0.01 degrees Celsius over a continuous ten-minute period.

[0050] Specifically, this threshold is the core specification for initiating calibration, and its rationality stems from the shortcomings of traditional calibration, based on the derivation of formulas (1) and (2). Taking a closed calibration space as the system, formulas (1) and (2) represent the effects of the system absorbing the same amount of heat before and after inserting the standard thermometer and the wireless temperature recorder to be calibrated, respectively. If the standard thermometer reading fluctuates too much, a stable functional relationship with the recorder to be calibrated cannot be established, ultimately leading to the failure of the calibration results.

[0051] (1) (2) in, The heat absorbed by a sealed chamber from the external environment; The heat capacity of the air inside the sealed cavity; The initial system temperature of the air inside the sealed cavity; The final temperature of the air in the sealed cavity after absorbing ΔQ1 heat; This represents the temperature rise after the air absorbs ΔQ1, i.e. = - ; This represents the temperature rise of the air at observation time t. The heat capacity of a standard thermometer; This represents the temperature rise of the standard thermometer at observation time t. The thermal capacity of the wireless temperature recorder under test; The value of temperature rise of the wireless temperature recorder under test at observation time t; t is an arbitrary fixed observation time.

[0052] Because air has a low specific heat capacity, while the standard thermometer has a low heat capacity... The thermal capacity of the wireless temperature sensor under test If they are large and different, then we will discuss two cases: 1. The air temperature is uniform because and The responses of the standard thermometer and the thermometer under test are not the same, therefore the temperature of the standard thermometer at time t is different. +δ and the temperature of the wireless temperature sensor under test +δ Inconsistent; 2. If the air temperature is uneven, the air temperature around the standard thermometer and the wireless temperature recorder under test will be different. Therefore, it will be more difficult for the two thermometers to reach the same value at time t. Even if the two thermometers are in thermal equilibrium with the air for a long enough time, the readings of the two thermometers cannot establish a stable functional relationship due to the uneven air temperature.

[0053] Based on the above two points of analysis, if a low-temperature constant temperature chamber is used to calibrate a wireless temperature recorder, the wireless temperature sensor cannot be directly calibrated because the temperature stability of the air in the constant temperature chamber is poor.

[0054] The setting of this threshold directly echoes the design goals of the temperature equalizer and the three-layer temperature screen, namely, to achieve a temperature stability better than 0.01 ℃ / 10 minutes through structural optimization, providing hardware support for the standard to reach this threshold.

[0055] In an optional implementation, see Figure 2 As shown, Figure 2The flowchart illustrates a specific calibration method for a wireless temperature recorder provided in Embodiment 1 of this application. The method involves determining the indication error or calibration coefficient of the wireless temperature recorder to be calibrated based on the temperature measurement value of the standard thermometer and the temperature indication value of the wireless temperature recorder to be calibrated, including steps S201-S202: S201: Determine the reference temperature value based on the temperature measurement value of the standard thermometer.

[0056] Specifically, determining the reference temperature value based on the reading of the standard thermometer includes: Acquire a first reading of the standard thermometer when it is determined that the stable isothermal air environment has been formed, and a second reading of the standard thermometer after acquiring the temperature reading; The arithmetic mean of the first and second readings is calculated and used as the reference temperature value.

[0057] More specifically, the reference temperature value needs to be obtained through two readings: the first before calibration starts (when the standard reading meets the first set threshold), and the second after calibration is completed. The average of the two readings is the final reference temperature.

[0058] Throughout the calibration process, the readings of the sheathed platinum resistance thermometer must be continuously monitored. If the temperature change exceeds the threshold of 0.01℃ / 10 minutes, the calibration must be interrupted immediately, and the acquired data will be invalidated. Calibration should only be restarted after the environment has stabilized.

[0059] S202: Determine the indication error or the calibration coefficient based on the temperature reading and the reference temperature value.

[0060] Specifically, the calculation of indication error directly reflects the measurement deviation of the recorder under specific low-temperature conditions (such as -80 ℃), providing a direct basis for judging whether the recorder is qualified and whether it needs to be corrected.

[0061] The fitting of the calibration coefficients is based on the stable functional relationship between the standard and the recorder to be calibrated. The corrected recorder can be more accurately adapted to actual scenarios such as ship cold chain and ship electromechanical equipment monitoring, ensuring the quality and safety of temperature-controlled goods such as medicines and food, as well as the accurate monitoring of equipment operating status.

[0062] In an optional implementation, determining the indication error or the calibration coefficient based on the temperature indication and the reference temperature value includes: Subtracting the temperature reading from the reference temperature value yields the reading error of the wireless temperature recorder to be calibrated at the low-temperature calibration temperature.

[0063] Specifically, this calculation method is simple and efficient, requiring no complex algorithms. It is suitable for scenarios where calibration efficiency is required, and the deviation results are intuitive and easy to understand, making it easy to quickly determine whether the recorder's measurement accuracy meets the application requirements.

[0064] Alternatively, based on the difference between the temperature reading and the reference temperature value, a calibration coefficient for correcting the measurement results of the wireless temperature recorder to be calibrated can be determined using a preset fitting function.

[0065] Specifically, the establishment of the preset fitting function depends on the high uniformity and high stability of the isothermal environment provided by the isothermal body. Only when the values ​​of the two have a stable functional relationship can the fitted calibration coefficient effectively correct the measurement deviation of the recorder in the entire temperature range and improve the reliability of long-term use.

[0066] Example 2 See Figure 3 As shown, Figure 3 A schematic diagram of a calibration device for a wireless temperature recorder provided in Embodiment 2 of this application is shown. The device is used to implement the calibration method for the wireless temperature recorder shown in Embodiment 1 above. The device includes: Low temperature incubator 301.

[0067] Specifically, the low-temperature constant temperature chamber provides a basic low-temperature environment for the device and must be able to maintain the set temperature (down to -80 ℃). Although its temperature fluctuation does not meet the direct requirements of calibration, the high stability environment required for calibration can be indirectly achieved through subsequent structural optimization of the temperature screen and the temperature equalization body.

[0068] This device is a core component of the calibration setup and requires no additional modifications. The components consisting of a multi-layer temperature screen and a temperature equalization body can be placed directly inside it, making it compatible with existing laboratory and calibration site conditions.

[0069] The multi-layer temperature shield 302 installed inside the low-temperature constant temperature chamber forms a quasi-insulated space.

[0070] Specifically, the multi-layer temperature shield is preferably designed with three layers and is fixed inside the low-temperature constant temperature chamber in an independent manner, without direct contact with the temperature equalization body.

[0071] The core function of the three-layer temperature shield is to reduce heat exchange between the internal environment of the refrigerator and the isothermal body, reduce the impact of external temperature fluctuations on the isothermal body, and provide a guarantee for the isothermal body to maintain a stable temperature. It is one of the key structures for achieving a highly stable isothermal environment.

[0072] The temperature equalization body 303 is disposed in the quasi-insulated space. The temperature equalization body is made of a metal material with high thermal conductivity. The temperature equalization body is provided with a standard instrument mounting space 304 for mounting a standard thermometer, and at least one cylindrical calibration space 305 for mounting a temperature sensing probe of a wireless temperature recorder to be calibrated.

[0073] Specifically, the temperature equalization body is made of oxygen-free copper, whose high thermal conductivity ensures uniform internal temperature without obvious temperature gradients. Compared with other low thermal conductivity materials, it is easier to establish a stable functional relationship between the standard and the recorder to be calibrated.

[0074] The large heat capacity of the isothermal body is the core guarantee of its temperature stability: its heat capacity is much greater than that of the air inside the three-layer temperature shield. Combined with the 12 kg mass design, it can effectively resist the temperature interference of the external environment. Even if it absorbs a small amount of heat, it will not cause significant fluctuations in its own temperature.

[0075] The standard mounting space is located at the central axis of the temperature equalization body and is a deep cylindrical space structure, suitable for the installation of a matching tube platinum resistance thermometer; the calibration mounting spaces are arranged around the standard mounting space, and the number can be adjusted according to the number of recorders to be calibrated, and all calibration mounting spaces are parallel to the axis of the standard mounting space.

[0076] In one optional implementation, the multi-layer temperature shield has three layers, and the temperature equalization body is disposed within the quasi-insulated space enclosed by the multi-layer temperature shield through an insulating support, and has no direct thermal conduction connection with the multi-layer temperature shield.

[0077] Specifically, the design of the thermal insulation support components avoids direct contact between the temperature equalizer and the temperature screen, eliminating heat exchange caused by direct contact and further enhancing the constant temperature effect of the quasi-insulated space, echoing the design concept of "reducing the influence of the temperature equalizer on the environment".

[0078] This installation method ensures that the temperature equalizer exchanges only a small amount of heat with the temperature screen through air and the support. Combined with its large heat capacity, it can maintain a stable temperature state for a long time, meeting the stringent requirements of the constant temperature environment for the calibration process.

[0079] In one optional embodiment, the temperature equalizer is made of oxygen-free copper, is cylindrical, has a diameter of not less than 150 mm, and a mass of not less than 12 kg.

[0080] Specifically, the mass of the homogeneous body is calculated using the formula "y=π". x²×z” is derived, where y is the mass of the temperature homogenizer (or its core component); x is the radius of the core component of the temperature homogenizer; and z is the height of the core component of the temperature homogenizer.

[0081] The design parameters of diameter ≥150 mm and mass ≥12 kg are the preferred schemes derived from thermal performance calculations: the diameter ensures temperature uniformity within a range of 150 mm, the mass guarantees large heat capacity characteristics, and the combination of the two achieves stable performance under operating conditions of -80 ℃.

[0082] The density of oxygen-free copper is 8.9 g / cm³, which is consistent with the above mass calculation formula, ensuring that the heat capacity of the isothermal body meets the design requirements and further guarantees temperature stability.

[0083] The calibration device is configured such that, when the low-temperature constant temperature chamber is in calibration condition at -80 ℃, the temperature uniformity of the temperature equalization body within a diameter of 150 mm is better than 0.05 ℃, and the temperature change rate is better than 0.01 ℃ per 10 minutes.

[0084] Specifically, this configuration parameter is the core guarantee for the effective implementation of the calibration method: temperature uniformity is better than 0.05℃, which solves the problem of poor air uniformity in traditional constant temperature chambers (corresponding to δ in formula 2). T (1. Uneven distribution defect); the temperature change rate is better than 0.01 ℃ / 10 minutes, providing hardware support for the stability criterion of the standard instrument reading meeting 0.01 ℃ / 10 minutes.

[0085] This parameter directly aligns with the calibration specifications' requirements for the constant temperature source, ensuring that the standard thermometer and the recorder to be calibrated can establish a stable functional relationship, ultimately achieving accurate calibration while avoiding the leakage risks and insufficient accuracy issues of traditional calibration methods.

[0086] Example 3 Based on the same application concept, see [link / reference] Figure 4 As shown, Figure 4 This illustration shows a structural schematic diagram of a computer device provided in Embodiment 3 of this application, wherein, as shown... Figure 4 As shown, the computer device 400 provided in Embodiment 3 of this application includes: The computer device 400 includes a processor 401, a memory 402, and a bus 403. The memory 402 stores machine-readable instructions that can be executed by the processor 401. When the computer device 400 is running, the processor 401 communicates with the memory 402 via the bus 403. When the machine-readable instructions are executed by the processor 401, they perform the steps of the calibration method for the wireless temperature recorder shown in Embodiment 1 above.

[0087] Example 4 Based on the same concept, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the calibration method for the wireless temperature recorder described in any of the above embodiments.

[0088] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0089] The computer program product for calibrating a wireless temperature recorder provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0090] The calibration method and apparatus for the wireless temperature recorder provided in this application embodiment can be specific hardware on the device or software or firmware installed on the device. The implementation principle and technical effects of the apparatus provided in this application embodiment are the same as those in the foregoing method embodiments. For the sake of brevity, any parts not mentioned in the apparatus embodiment can be referred to the corresponding content in the foregoing method embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, apparatuses, and units described above can all be referred to the corresponding processes in the above method embodiments, and will not be repeated here.

[0091] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0092] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0093] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0094] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0095] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0096] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A calibration method for a wireless temperature recorder, characterized in that, The method includes: A calibration environment is constructed, wherein the calibration environment is used to simulate the real-world use scenario of the wireless temperature recorder, and the readings of the wireless temperature recorder and the standard thermometer satisfy a preset functional relationship in the calibration environment. The calibration environment includes a homogenizing body made of a material with high thermal conductivity, and the homogenizing body is set in a quasi-insulated space. A standard thermometer and at least one wireless temperature recorder to be calibrated are mounted on the temperature equalization body, and the temperature sensing probe of the wireless temperature recorder to be calibrated is surrounded by the material of the temperature equalization body. The entire calibration environment is placed in a low-temperature constant temperature chamber, and the low-temperature constant temperature chamber is controlled to work normally at the preset low-temperature calibration temperature. The temperature measurement value of the standard thermometer is monitored. When the rate of change of the temperature measurement value is lower than a first set threshold, it is determined that the isothermal body and the area surrounding the temperature sensing probe form a stable isothermal air environment. In the isothermal air environment, the temperature reading of the wireless temperature recorder to be calibrated is acquired; Based on the temperature measurement value of the standard thermometer and the temperature reading value of the wireless temperature recorder to be calibrated, the reading error or calibration coefficient of the wireless temperature recorder to be calibrated is determined.

2. The method according to claim 1, characterized in that, Mounting the wireless temperature recorder to be calibrated onto the temperature homogenizing body, and ensuring that the temperature sensing probe of the wireless temperature recorder to be calibrated is surrounded by the material of the temperature homogenizing body, includes: The temperature sensor is inserted into the pre-set calibration installation space on the temperature equalization body, so that an annular quasi-sealed air gap is formed between the wall of the calibration installation space and the outer surface of the temperature sensor.

3. The method according to claim 1, characterized in that, The first set threshold is: The reading of the standard thermometer changes by less than 0.01 degrees Celsius over a continuous ten-minute period.

4. The method according to claim 1, characterized in that, The process of determining the indication error or calibration coefficient of the wireless temperature recorder to be calibrated based on the temperature measurement value of the standard thermometer and the temperature indication value of the wireless temperature recorder to be calibrated includes: The reference temperature value is determined based on the temperature measurement value of the standard thermometer; The indication error or the calibration coefficient is determined based on the temperature reading and the reference temperature value.

5. The method according to claim 4, characterized in that, Determining the indication error or the calibration coefficient based on the temperature reading and the reference temperature value includes: Subtracting the temperature reading from the reference temperature value yields the reading error of the wireless temperature recorder to be calibrated at the low-temperature calibration temperature. Alternatively, based on the difference between the temperature reading and the reference temperature value, a calibration coefficient for correcting the measurement results of the wireless temperature recorder to be calibrated can be determined using a preset fitting function.

6. A calibration device for a wireless temperature recorder, characterized in that, The apparatus is used to implement the method according to any one of claims 1 to 5, and the apparatus comprises: cryogenic incubator; The multi-layer temperature screens installed inside the low-temperature constant temperature chamber form a quasi-insulated space. The temperature equalization body is disposed in the quasi-insulated space, wherein the temperature equalization body is made of a metal material with high thermal conductivity, and the temperature equalization body is provided with a standard instrument mounting space for mounting a standard thermometer, and at least one cylindrical calibration space for mounting a temperature sensing probe of a wireless temperature recorder to be calibrated.

7. The apparatus according to claim 6, characterized in that, The multi-layer temperature shield has three layers. The temperature equalization body is set in the quasi-insulated space enclosed by the multi-layer temperature shield through an insulating support, and has no direct thermal conduction connection with the multi-layer temperature shield.

8. The apparatus according to claim 7, characterized in that, The temperature equalization body is made of oxygen-free copper, is cylindrical, has a diameter of not less than 150 mm, and a mass of not less than 12 kg. The calibration device is configured such that, when the low-temperature constant temperature chamber is in calibration condition at -80 ℃, the temperature uniformity of the temperature equalization body within a diameter of 150 mm is better than 0.05 ℃, and the temperature change rate is better than 0.01 ℃ per 10 minutes.

9. A computer device, characterized in that, include: The device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the computer device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, they perform the steps of the calibration method for the wireless temperature recorder as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the calibration method for the wireless temperature recorder as described in any one of claims 1 to 7.

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