Modular high precision reference system, reference recovery method and apparatus

Abstract

The application discloses a modular high-precision reference system, a reference recovery method and device, and belongs to the technical field of integrated circuits. The system comprises a replaceable reference module, an interface assembly matched with the reference module, and a host unit; the reference module comprises a reference voltage source, a non-volatile memory and a temperature sensor, and the non-volatile memory stores calibration parameters bound with the reference module; the interface assembly is detachably connected with the reference module and the host unit; and the host unit is used for reading the calibration parameters stored in the non-volatile memory of the replaced reference module through the interface assembly in the case of replacing the reference module, and performing compensation calculation according to the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, so as to restore the measurement accuracy of the system. The application can quickly restore the measurement accuracy of the system by setting the replaceable reference module and the matched detachable interface assembly, thereby improving the measurement accuracy.

Description

Technical Field

[0001] This application belongs to the field of integrated circuit technology, and in particular relates to a modular high-precision reference system, reference recovery method and device. Background Technology

[0002] In high-precision measurement and testing equipment, the reference voltage source is a core component ensuring measurement accuracy and repeatability. Whether in digital multimeters, power analyzers, power grid metering equipment, or scientific experimental platforms, the long-term stability of the reference voltage source directly affects the performance level of the equipment and the reliability of the measurement results. Commonly used high-precision reference voltage sources include temperature-controlled Zener diode references and low-temperature drift integrated references. However, during long-term operation, the reference voltage source will slowly drift due to temperature changes, component aging, and environmental stress, thereby reducing the accuracy of the measurement system.

[0003] In related technologies, reference voltage sources are mostly directly fixed and soldered onto the motherboard or internal module. When the reference voltage source ages or is damaged, the device needs to be disassembled and soldered, which may introduce additional stress that affects the stability of the reference and leads to a decrease in measurement accuracy. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a modular high-precision reference system, a reference recovery method, and an apparatus to improve measurement accuracy.

[0005] In a first aspect, this application provides a modular high-precision reference system, comprising: an independently replaceable reference module, an interface component matching the reference module, and a host unit;

[0006] The reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor. The non-volatile memory stores calibration parameters that are bound to the reference module.

[0007] The interface components are detachably connected to the reference module and the host unit, respectively.

[0008] The host unit is used to read the calibration parameters stored in the non-volatile memory of the replaced reference module through the interface component when the reference module is replaced, and to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor in order to restore the measurement accuracy of the system.

[0009] According to the modular high-precision reference system of this application, by setting up independently replaceable reference modules and matching detachable interface components, when the reference voltage source ages or is damaged, there is no need to disassemble and weld the equipment. The reference module can be replaced through the interface components, simplifying the maintenance process and reducing the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After the host unit replaces the reference module, it can read the calibration parameters of the new module through the interface components and perform conversion compensation by combining the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0010] According to one embodiment of this application, the reference module further includes a buffer amplifier circuit and a protection circuit;

[0011] The buffer amplifier circuit is used to provide low output impedance to maintain a stable output of the reference voltage.

[0012] The protection circuit includes an electrostatic discharge circuit and / or a surge protection circuit.

[0013] In this embodiment, the buffer amplifier circuit provides a low output impedance to the reference voltage source, which can reduce the impact of load changes on the reference voltage output, so that the reference voltage can be output stably under different load conditions. The electrostatic discharge circuit and / or surge protection circuit included in the protection circuit can reduce external electrostatic interference and sudden surge impact, thereby improving the service life of the reference module.

[0014] According to one embodiment of this application, the calibration parameters include at least one of the following: factory calibration value, temperature compensation model, calibration certificate summary, timestamp, and unique serial number of the reference module.

[0015] According to one embodiment of this application, the interface component includes a ground terminal, a power supply terminal, a signal terminal, and a data communication terminal, wherein the ground terminal makes electrical contact with the signal terminal in priority; or the interface component includes a sensing terminal for providing remote voltage sensing.

[0016] In this embodiment, the interface component includes a grounding terminal, a power supply terminal, a signal terminal, and a data communication terminal, which can realize the independent and orderly transmission of power, signals, and data between the reference module and the host unit, reducing mutual interference between different types of electrical signals. The grounding terminal takes precedence over the signal terminal in making electrical contact, which can establish a grounding loop before signal transmission, discharge static electricity or induced charge, and reduce the impact damage to the core components in the reference module or the host unit caused by the potential difference at the moment of contact. When the interface component includes a sensing terminal for providing remote voltage sensing, the actual voltage signal of the load terminal can be directly collected and fed back to the system, reducing voltage attenuation caused by factors such as wire impedance.

[0017] According to one embodiment of this application, the interface component is further provided with an asymmetric mechanical positioning structure.

[0018] In this embodiment, the asymmetric mechanical positioning structure can form directional constraints on the connection between the reference module and the interface component, reducing the problem of reverse insertion or misaligned installation caused by human error.

[0019] According to one embodiment of this application, the host unit includes a microprocessor controller, a parameter reading and compensation unit, and a data verification unit;

[0020] The microprocessor controller is used to identify the replaced reference module and read the calibration parameters stored in the non-volatile memory through its interface component when the reference module is replaced.

[0021] The data verification unit is used to perform cyclic redundancy check or digital signature check on the read calibration parameters;

[0022] The parameter reading and compensation unit is used to perform conversion compensation based on the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters, in order to restore the measurement accuracy of the system, if the verification is successful.

[0023] In this embodiment, the data verification unit verifies the read calibration parameters through cyclic redundancy check or digital signature verification. This can identify anomalies in the verification parameters during storage or transmission, reducing the number of erroneous calibration parameters entering the subsequent compensation process. After the parameter reading and compensation unit passes the verification, it performs conversion compensation by combining the real-time temperature detected by the temperature sensor with the temperature compensation model in the calibration parameters, enabling the measurement accuracy to be quickly restored after the reference module is replaced.

[0024] According to one embodiment of this application, the step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes:

[0025] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model;

[0026] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0027] If the difference is within the target range, the reference voltage of the reference module is enabled.

[0028] In this embodiment, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model in the calibration parameters based on the real-time temperature detected by the temperature sensor. This ensures that the reference voltage is adapted to the temperature environment, making the calibration process conform to actual working conditions. By comparing the equivalent voltage reference value with the archived reference value of the reference module before replacement, the performance consistency of the replaced reference module can be verified. When the difference is within the target range, the reference voltage is activated, reducing the problem of measurement accuracy deviation caused by the new reference module being connected to the system, and further improving the measurement accuracy.

[0029] According to one embodiment of this application, the step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes:

[0030] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0031] In this embodiment, when the difference between the equivalent voltage reference value and the archived reference value of the reference module before replacement exceeds the target range, a compensation coefficient is calculated, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient. This allows the reference module with performance deviation to be adapted to the dynamic gain calibration system, reducing the problem of accuracy degradation caused by the reference deviation being transmitted to the measurement results, and further improving the measurement accuracy of the system during the reference module replacement process.

[0032] According to one embodiment of this application, the host unit is further configured to:

[0033] A log is generated based on the replacement record of the reference module; the replacement record includes the reference voltage ratio, temperature, timestamp, and unique serial number of the reference module before and after replacement.

[0034] In this embodiment, by generating logs based on the replacement records of the baseline module, data support can be provided for system maintenance and performance analysis, enabling maintenance personnel to understand the system's operating status and historical changes, and maintain the system's stable operation.

[0035] Secondly, this application provides a baseline recovery method, including:

[0036] Upon detecting that an interface component has been inserted into a reference module, the calibration parameters stored in the reference module are read through the interface component; the reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor;

[0037] The system's measurement accuracy is restored by performing a conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor.

[0038] According to the reference recovery method of this application, by setting up an independently replaceable reference module and a matching detachable interface component, when the reference voltage source ages or is damaged, there is no need to disassemble and solder the equipment. The reference module can be replaced through the interface component, which simplifies the maintenance process and reduces the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After replacing the reference module, the calibration parameters of the new module can be read through the interface component, and the temperature compensation model in the calibration parameters can be combined with the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters for conversion and compensation. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0039] According to one embodiment of this application, the calibration parameters further include at least one of the following: factory calibration value, temperature compensation model, calibration certificate summary, timestamp, and unique serial number of the reference module; the method further includes:

[0040] The calibration parameters are subjected to cyclic redundancy check or digital signature check.

[0041] According to one embodiment of this application, the step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes:

[0042] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model;

[0043] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0044] If the difference is within the target range, the reference voltage of the reference module is enabled.

[0045] According to one embodiment of this application, the method further includes:

[0046] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0047] Thirdly, this application provides a reference recovery device, comprising:

[0048] A reading module is used to read calibration parameters stored in a reference module through an interface component when the insertion of an interface component into the reference module is detected; the reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor;

[0049] The recovery module is used to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, so as to restore the measurement accuracy of the system.

[0050] According to the reference recovery device of this application, by setting an independently replaceable reference module and a matching detachable interface component, when the reference voltage source ages or is damaged, there is no need to disassemble and solder the equipment. The reference module can be replaced through the interface component, which simplifies the maintenance process and reduces the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After replacing the reference module, the calibration parameters of the new module can be read through the interface component, and the temperature compensation model in the calibration parameters can be combined with the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters for conversion and compensation. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0051] According to one embodiment of this application, the recovery module is further configured to:

[0052] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model;

[0053] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0054] If the difference is within the target range, the reference voltage of the reference module is enabled;

[0055] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0056] Fourthly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the benchmark recovery method as described in the second aspect above.

[0057] Fifthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the baseline recovery method as described in the second aspect above.

[0058] In a sixth aspect, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the benchmark recovery method as described in the second aspect above.

[0059] In a seventh aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the benchmark recovery method as described in the second aspect above.

[0060] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects:

[0061] According to the modular high-precision reference system of this application, by setting up independently replaceable reference modules and matching detachable interface components, when the reference voltage source ages or is damaged, there is no need to disassemble and weld the equipment. The reference module can be replaced through the interface components, simplifying the maintenance process and reducing the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After the host unit replaces the reference module, it can read the calibration parameters of the new module through the interface components and perform conversion compensation by combining the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0062] In some embodiments, the buffer amplifier circuit provides a low output impedance to the reference voltage source, which can reduce the impact of load changes on the reference voltage output, so that the reference voltage can be output stably under different load conditions. The electrostatic discharge circuit and / or surge protection circuit included in the protection circuit can reduce external electrostatic interference and sudden surge impact, thereby improving the service life of the reference module.

[0063] In some embodiments, the interface component includes a grounding terminal, a power supply terminal, a signal terminal, and a data communication terminal, which can realize the independent and orderly transmission of power, signals, and data between the reference module and the host unit, reducing mutual interference between different types of electrical signals. The grounding terminal takes precedence over the signal terminal in making electrical contact, which can establish a grounding loop before signal transmission, discharge static electricity or induced charge, and reduce the impact damage to the core components in the reference module or the host unit caused by the potential difference at the moment of contact. When the interface component includes a sensing terminal for providing remote voltage sensing, the actual voltage signal of the load terminal can be directly collected and fed back to the system, reducing voltage attenuation caused by factors such as wire impedance.

[0064] In some embodiments, the asymmetric mechanical positioning structure can provide directional constraints on the connection between the reference module and the interface components, reducing the problem of reverse insertion or misaligned installation caused by human error.

[0065] In some embodiments, the data verification unit verifies the read calibration parameters through cyclic redundancy check or digital signature verification. This can identify anomalies in the verification parameters during storage or transmission, reducing the number of erroneous calibration parameters entering the subsequent compensation process. After the parameter reading and compensation unit passes the verification, it performs conversion compensation by combining the real-time temperature detected by the temperature sensor with the temperature compensation model in the calibration parameters, enabling the measurement accuracy to be quickly restored after the reference module is replaced.

[0066] In some embodiments, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model in the calibration parameters based on the real-time temperature detected by the temperature sensor. This adapts the reference voltage to the temperature environment, making the calibration process consistent with actual operating conditions. By comparing the equivalent voltage reference value with the archived reference value of the reference module before replacement, the performance consistency of the replaced reference module can be verified. When the difference is within the target range, the reference voltage is activated, reducing the problem of measurement accuracy deviation caused by the new reference module being connected to the system, and further improving measurement accuracy.

[0067] In some embodiments, when the difference between the equivalent voltage reference value and the archived reference value of the reference module before replacement exceeds the target range, a compensation coefficient is calculated, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient. This allows the reference module with performance deviation to be adapted to the system through dynamic gain calibration, reducing the problem of accuracy degradation caused by the reference deviation being transmitted to the measurement results, and further improving the measurement accuracy of the system during the reference module replacement process.

[0068] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0069] 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.

[0070] Figure 1 This is a schematic diagram of the modular high-precision reference system provided in the embodiments of this application;

[0071] Figure 2 This is a schematic diagram of the baseline module update process provided in an embodiment of this application;

[0072] Figure 3 This is a schematic flowchart of the baseline recovery method provided in the embodiments of this application;

[0073] Figure 4 This is a schematic diagram of the reference recovery device provided in the embodiments of this application;

[0074] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0075] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0076] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0077] The modular high-precision reference system, reference recovery method, and apparatus provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0078] like Figure 1As shown, this application provides a modular high-precision reference system 100, including: an independently replaceable reference module 110, an interface component 120 that matches the reference module, and a host unit 130;

[0079] The reference module 110 includes a reference voltage source, a non-volatile memory, and a temperature sensor. The non-volatile memory stores calibration parameters bound to the reference module 110.

[0080] The interface component 120 is detachably connected to the reference module 110 and the host unit 130, respectively.

[0081] The host unit 130 is used to read the calibration parameters stored in the non-volatile memory of the replaced reference module 110 through the interface component 120 when the reference module 110 is replaced, and to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, so as to restore the measurement accuracy of the modular high-precision reference system 100.

[0082] In this embodiment, the reference module 110 can provide a stable reference voltage for the modular high-precision reference system 100 and has independent replacement characteristics, which can be quickly replaced when aging or damaged.

[0083] The reference module 110 may include a reference voltage source, a non-volatile memory, and a temperature sensor.

[0084] The reference voltage source can employ a high-stability reference chip. To further improve the stability of the reference voltage source's output voltage, the reference voltage source undergoes rigorous temperature drift screening and aging treatment before leaving the factory. This reduces the impact of temperature changes and performance degradation during long-term use on the accuracy of the reference voltage output, thus providing a high-precision reference voltage for the modular high-precision reference system 100.

[0085] The non-volatile memory is a data storage component that is bound to the reference module 110 and can retain data even when the reference module 110 is powered off. The non-volatile memory stores calibration parameters, which may include factory calibration values, temperature compensation models, calibration certificate summaries, timestamps, and the unique serial number of the reference module 110.

[0086] The factory calibration record records the standard value of the reference voltage of the reference module 110 under standard conditions; the temperature compensation model is a mathematical model based on the characteristics of the reference module 110, used to quantify the influence of temperature changes on the reference voltage; the calibration certificate summary includes information on the calibration process of the reference module 110, used to verify the validity of the calibration; the timestamp marks the execution time of the calibration operation; the unique serial number of the reference module 110 is used to uniquely identify each reference module 110.

[0087] The temperature sensor is a temperature detection component that can be positioned close to the reference voltage source to accurately capture the temperature of the reference voltage source during operation. Since the output characteristics of the reference voltage source are easily affected by temperature, the temperature data collected by the temperature sensor can be used as input parameters for subsequent temperature compensation calculations.

[0088] Interface component 120 is a component in modular high-precision reference system 100 that connects reference module 110 and host unit 130. Reference module 110 can be connected to modular high-precision reference system 100 through interface component 120. When reference module 110 needs to be replaced, the old reference module 110 can be removed and the new reference module 110 can be connected to interface component 120.

[0089] In some embodiments, the connection between the interface component 120 and the reference module 110 can be achieved through mechanical connection structures and electrical connection methods. For example, the interface component 120 can use electrical connection methods such as gold fingers or pins to improve contact performance and anti-interference capabilities, thereby ensuring stable signal transmission.

[0090] Interface component 120 can also realize electrical signal transmission and data communication between reference module 110 and host unit 130. For example, the reference voltage output by the reference voltage source in reference module 110 can be transmitted to host unit 130 through interface component 120 to provide a reference for system measurement; the calibration parameters stored in the non-volatile memory of reference module 110 and the real-time temperature data collected by the temperature sensor can be uploaded to host unit 130 through interface component 120, and the control commands of host unit 130 can also be sent to reference module 110 through interface component 120.

[0091] The host unit 130 is used to process, calculate and compensate the signals and data transmitted by the reference module 110.

[0092] When the reference module 110 is replaced, the host unit 130 can establish a communication connection with the newly replaced reference module 110 through the interface component 120 and read the calibration parameters stored in the non-volatile memory of the reference module 110. After completing the reading of the calibration parameters, the host unit 130 performs conversion compensation by combining the temperature compensation model in the calibration parameters and the real-time temperature of the reference voltage source detected by the temperature sensor.

[0093] Specifically, the host unit 130 can use the real-time temperature data to calculate the equivalent voltage reference value of the reference voltage under the temperature condition according to the temperature compensation model. Then, based on the equivalent voltage reference value, the reference voltage signal output by the reference module 110 is adjusted so that the reference voltage output by the modular high-precision reference system 100 is restored to a high-precision level, thereby reducing the impact of the measurement accuracy of the modular high-precision reference system 100 on the replacement process of the reference module 110.

[0094] According to the modular high-precision reference system of this application, by setting up independently replaceable reference modules and matching detachable interface components, when the reference voltage source ages or is damaged, there is no need to disassemble and weld the equipment. The reference module can be replaced through the interface components, simplifying the maintenance process and reducing the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After the host unit replaces the reference module, it can read the calibration parameters of the new module through the interface components and perform conversion compensation by combining the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters. This can quickly restore the measurement accuracy of the modular high-precision reference system, thereby improving the measurement accuracy.

[0095] In some embodiments, the reference module 110 further includes a buffer amplifier circuit and a protection circuit;

[0096] The buffer amplifier circuit is used to provide low output impedance to maintain a stable output reference voltage;

[0097] The protection circuit includes electrostatic discharge circuit and / or surge protection circuit.

[0098] In this embodiment, although the reference voltage source can have high-precision output characteristics through temperature drift screening and aging treatment, the output impedance of the reference voltage source is usually high. In practical application scenarios, when driving loads with different impedances or transmitting signals through interface component 120, the output voltage is easily affected by changes in load impedance, resulting in a decrease in measurement accuracy.

[0099] Therefore, a buffer amplifier circuit can be set up. The buffer amplifier circuit may include operational amplifiers, peripheral resistors, capacitors and other components. The input terminal of the buffer amplifier circuit is connected to the output terminal of the reference voltage source, and the output terminal of the buffer amplifier circuit can be connected to the signal output node inside the interface component 120 or the reference module 110.

[0100] The buffer amplifier circuit can utilize the follower or amplification characteristics of the operational amplifier to reduce the output impedance of the reference voltage signal, so that the reference voltage signal can maintain a stable output under different load conditions and different transmission distances.

[0101] The protection circuit may include electrostatic discharge circuit, surge protection circuit, etc., and the protection circuit may be set at the signal input interface, power interface and pins of the core components of the reference module 110.

[0102] The electrostatic discharge circuit can include components such as electrostatic protection diodes and bleed resistors. When electrostatic charge accumulates on the surface or pins of the reference module 110 and reaches a certain voltage, the electrostatic protection diode in the electrostatic discharge circuit will conduct, and conduct the electrostatic charge to the ground terminal through the bleed path, reducing the risk of high voltage electrostatic discharge damaging sensitive devices such as the precision chip of the reference voltage source and the storage cell of the non-volatile memory.

[0103] Surge protection circuits can include components such as varistors, gas discharge tubes, and surge suppression diodes. Under conditions of power supply fluctuations or external electromagnetic interference coupling, instantaneous high-energy surge signals can easily be generated in the circuit. Surge protection circuits can limit the surge voltage to a safe range through their discharge characteristics, or dissipate the surge energy to ground, preventing surge signals from entering the internal circuitry of the module and avoiding damage to components such as the operational amplifier in the buffer amplifier circuit and the detection circuitry of the temperature sensor.

[0104] In this embodiment, the buffer amplifier circuit provides a low output impedance to the reference voltage source, which can reduce the impact of load changes on the reference voltage output, so that the reference voltage can be output stably under different load conditions. The electrostatic discharge circuit and / or surge protection circuit included in the protection circuit can reduce external electrostatic interference and sudden surge impact, thereby improving the service life of the reference module.

[0105] In some embodiments, the interface component 120 includes a ground terminal, a power supply terminal, a signal terminal, and a data communication terminal, with the ground terminal providing electrical contact over the signal terminal; or the interface component 120 includes a sensing terminal for providing remote voltage sensing.

[0106] In this embodiment, the interface component 120 may include a grounding terminal, a power supply terminal, a signal terminal, and a data communication terminal. The grounding terminal, power supply terminal, signal terminal, and data communication terminal are arranged according to a preset rule to form a connection structure for the interface end of the reference module 110. The grounding terminal can be designed with an extended physical length or optimized contact stroke so that when the operator performs the replacement operation of the reference module 110, the grounding terminal can make electrical contact with the signal terminal first, thereby improving the connection safety.

[0107] Specifically, when replacing the reference module 110, the operator can align the interface end of the reference module 110 with the adapter interface of the interface assembly 120 and complete the detachable connection through mechanical structures such as snap-fit ​​and plug-in. During the connection process, due to the physical length or contact stroke advantage of the grounding terminal, the grounding terminal can first make electrical contact with the corresponding grounding pin of the interface end of the reference module 110, forming a grounding loop. After the grounding loop is stably conducting, the power supply terminal, data communication terminal, and signal terminal will sequentially make contact with the corresponding pins of the reference module 110. This can reduce the problem of static electricity or instantaneous current entering the interior of the reference module 110 through the signal terminal and data communication terminal due to the potential difference between the reference module 110 and the modular high-precision reference system 100 during the initial connection, which could damage sensitive devices such as the reference voltage source and non-volatile memory.

[0108] In some embodiments, the interface component 120 can be configured with a remote voltage sensing function. The interface component 120 can integrate a dedicated sensing terminal, which may include sensing pins and associated signal transmission lines. The arrangement of the sensing pins corresponds to the monitoring points at the signal output terminals of the reference module 110. During the assembly and connection process between the reference module 110 and the interface component 120, as the interface connects, the sensing pins of the sensing terminal and the signal output monitoring points of the reference module 110 simultaneously make contact.

[0109] In this embodiment, the interface component includes a grounding terminal, a power supply terminal, a signal terminal, and a data communication terminal, which can realize the independent and orderly transmission of power, signals, and data between the reference module and the host unit, reducing mutual interference between different types of electrical signals. The grounding terminal takes precedence over the signal terminal in making electrical contact, which can establish a grounding loop before signal transmission, discharge static electricity or induced charge, and reduce the impact damage to the core components in the reference module or the host unit caused by the potential difference at the moment of contact. When the interface component includes a sensing terminal for providing remote voltage sensing, the actual voltage signal of the load terminal can be directly collected and fed back to the system, reducing voltage attenuation caused by factors such as wire impedance.

[0110] In some embodiments, the interface component 120 is further provided with an asymmetric mechanical positioning structure.

[0111] In this embodiment, the asymmetric mechanical positioning structure can adopt designs such as a single-sided protrusion that matches the corresponding groove, an irregularly shaped guide post that matches an irregularly shaped hole, or a terminal array that is not centrally symmetrically arranged. The mechanical dimensional accuracy and the complementary structure of the interface end of the reference module 110 form a matching relationship.

[0112] During the assembly and connection process of the reference module 110 and the interface component 120, the asymmetric mechanical positioning structure provides guidance. Only when the complementary structure of the interface end of the reference module 110 is aligned with the asymmetric positioning structure of the interface component 120 can the interface ends of the two be fitted together.

[0113] In this embodiment, the asymmetric mechanical positioning structure can form directional constraints on the connection between the reference module and the interface component, reducing the problem of reverse insertion or misaligned installation caused by human error.

[0114] In some embodiments, the host unit includes a microprocessor controller, a parameter reading and compensation unit, and a data verification unit;

[0115] The microprocessor controller is used to identify the replaced reference module and read the calibration parameters stored in the non-volatile memory through its interface component when the reference module is replaced.

[0116] The data verification unit is used to perform cyclic redundancy check or digital signature verification on the read calibration parameters;

[0117] The parameter reading and compensation unit is used to perform conversion compensation based on the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters, after the calibration is passed, in order to restore the measurement accuracy of the system.

[0118] In this embodiment, the microprocessor controller can be a high-performance embedded microprocessor chip, and establish a communication link with the reference module 110 through the interface component 120.

[0119] The microprocessor controller can identify whether a new reference module 110 has been connected by monitoring the connection status signals of the interface component 120, such as level changes and interrupt signals. If a new reference module 110 is detected, the microprocessor controller can send a module identification command to the interface component 120 to request the calibration parameters stored in the non-volatile memory of the reference module 110.

[0120] In this embodiment, the data verification unit and the microprocessor controller can be connected via an internal data bus to receive calibration parameters transmitted by the microprocessor controller. The data verification unit may have a built-in Cyclic Redundancy Check (CRC) algorithm module or a digital signature verification module.

[0121] For example, the Cyclic Redundancy Check (CRC) module can perform polynomial operations on the check parameters to generate a fixed-length CRC check value, and compare the CRC check value with the factory CRC check value attached to the calibration parameters; the digital signature verification module can use a preset public key to decrypt and verify the digital signature in the calibration parameters to determine whether the calibration parameters have been tampered with.

[0122] The parameter reading and compensation unit can read the calibration parameters that have been verified by the data verification unit. Based on the calculation logic of the temperature compensation model in the calibration parameters, it receives the temperature data collected by the temperature sensor and substitutes it into the temperature compensation model to calculate and restore the measurement accuracy of the modular high-precision reference system 100.

[0123] In this embodiment, the data verification unit verifies the read calibration parameters through cyclic redundancy check or digital signature verification. This can identify anomalies in the verification parameters during storage or transmission, reducing the number of erroneous calibration parameters entering the subsequent compensation process. After the parameter reading and compensation unit passes the verification, it performs conversion compensation by combining the real-time temperature detected by the temperature sensor with the temperature compensation model in the calibration parameters, enabling the measurement accuracy to be quickly restored after the reference module is replaced.

[0124] In some embodiments, a conversion compensation is performed based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, including:

[0125] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using a temperature compensation model;

[0126] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0127] If the difference is within the target range, enable the reference voltage of the reference module.

[0128] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0129] In this embodiment, the temperature compensation model can be a polynomial model established by multi-point calibration within a certain temperature range, such as -40℃ to 85℃, before leaving the factory. For example, the temperature compensation model can include parameters such as the temperature coefficients of the first and second terms and the zero-temperature reference value. Of course, the temperature compensation model can also be in other forms, and this embodiment of the application does not limit it.

[0130] After receiving the temperature data, it can be substituted into the temperature compensation model for calculation to obtain the equivalent voltage reference value of the new reference module at the current target temperature. The equivalent voltage reference value is not the actual output voltage of the reference module 110, but rather the output voltage of the reference module 110 at the equivalent temperature after temperature equivalence correction. For example, if the current temperature is T1 and the actual output voltage of the current reference module 110 is V1, by substituting temperature T1 and output voltage V1 into the temperature compensation model for calculation, the output voltage of the reference module 110 at the equivalent temperature T2 can be obtained, i.e., the equivalent voltage reference value.

[0131] In this embodiment, the reference value is the equivalent voltage reference value of the reference module 110 before replacement at the same equivalent temperature. The difference between the equivalent voltage reference value and the reference value can be calculated, such as by calculating the absolute value of the difference between the equivalent voltage reference value and the reference value, or by calculating the ratio of the equivalent voltage reference value to the reference value.

[0132] Taking the absolute value of the difference between the equivalent voltage reference value and the reference value as an example, the target range can be preset according to the measurement accuracy requirements of the modular high-precision reference system 100. For example, the target range can be in ppm (parts per million) range, such as 10 ppm, meaning the absolute value of the difference is less than 10. -5 In this case, it can be determined that the performance deviation between the new reference module and the original reference module is within an acceptable range. The new reference module can then send a comparison pass signal to the microprocessor controller via the internal data bus. The microprocessor controller records the comparison result and activation time of this reference module replacement and updates the system operation log.

[0133] If the absolute value of the difference is greater than or equal to 10 ppm, it can be determined that the performance deviation between the new reference module and the original reference module is large, and compensation can be achieved by adjusting the reference gain of the analog-to-digital converter (ADC).

[0134] For example, the compensation coefficient can be calculated based on the ratio of the equivalent voltage reference value to the reference value. The compensation coefficient can be equal to the ratio of the equivalent voltage reference value to the reference value, or it can be obtained by further formula transformation of the ratio of the equivalent voltage reference value to the reference value. The purpose of the compensation coefficient is to adjust the reference gain of the analog-to-digital converter. This reference gain refers to the gain multiple required to make the equivalent output of the new reference module match the reference value.

[0135] In some embodiments, if the absolute value of the difference exceeds 10 ppm by too much, for example, greater than 50 ppm, an alarm can be output to prompt the user to perform external calibration or return to the factory for maintenance.

[0136] In this embodiment, the equivalent voltage reference value at the target temperature is calculated using the temperature compensation model in the calibration parameters based on the real-time temperature detected by the temperature sensor. This ensures that the reference voltage is adapted to the temperature environment, making the calibration process conform to actual working conditions. By comparing the equivalent voltage reference value with the archived reference value of the reference module before replacement, the performance consistency of the replaced reference module can be verified. When the difference is within the target range, the reference voltage is activated, reducing the problem of measurement accuracy deviation caused by the new reference module being connected to the system, and further improving the measurement accuracy.

[0137] In this embodiment, when the difference between the equivalent voltage reference value and the archived reference value of the reference module before replacement exceeds the target range, a compensation coefficient is calculated, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient. This allows the reference module with performance deviation to be adapted to the dynamic gain calibration system, reducing the problem of accuracy degradation caused by the reference deviation being transmitted to the measurement results, and further improving the measurement accuracy of the system during the reference module replacement process.

[0138] In some embodiments, the host unit can also be used for:

[0139] A log is generated based on the replacement records of the reference modules. The replacement records include the reference voltage ratio, temperature, timestamp, and unique serial numbers of the reference modules before and after replacement.

[0140] In this embodiment, the generated logs can be stored in the internal memory of the host unit 130, or transmitted to an external storage device or management system via a data communication terminal.

[0141] In this embodiment, by generating logs based on the replacement records of the baseline module, data support can be provided for system maintenance and performance analysis, enabling maintenance personnel to understand the system's operating status and historical changes, and maintain the system's stable operation.

[0142] The following scenario example illustrates the baseline module update process of this application embodiment.

[0143] like Figure 2 As shown, the device is first powered off and the reference module is replaced. Powering off the device ensures a safe state of no power and no signal transmission during the replacement process. After the physical replacement of the new reference module is completed, the host is powered on.

[0144] After the host is powered on, a detection process will be initiated to determine whether a reference module has been inserted. If the detection result is negative, it means that the reference module has not been replaced, and the system will maintain the original reference settings.

[0145] If a reference module is detected being inserted, its ID and serial number can be read. After reading the ID and serial number, the calibration parameters stored within the reference module are then read. The calibration parameters include the reference module's factory calibration values, temperature compensation model, and other information.

[0146] The read calibration parameters are verified, for example, by performing a CRC check. If the verification fails, it indicates that the calibration parameters may be incorrect or tampered with, which can trigger an abnormal event, prompting the operator to investigate and handle the reference module or parameters. If the verification passes, the system reads the temperature sensor data. Based on the temperature compensation model in the calibration parameters and the read temperature sensor data, the equivalent voltage reference value of the new reference module at the current temperature is calculated.

[0147] The equivalent voltage reference value of the old reference module is retrieved. By comparing the equivalent voltage reference values ​​of the old and new modules, the absolute value of the difference between them, ΔV, is calculated. If ΔV ≤ 10ppm, it indicates that the difference between the equivalent voltage reference values ​​of the old and new modules is small, and the new reference module can replace the old module. The system activates the new reference value, updates the system reference value, records this replacement event, completes the reference module update, and the equipment enters normal working condition.

[0148] If ΔV > 10ppm, continue to check if ΔV ≤ 50ppm. If ΔV ≤ 50ppm, it indicates a certain difference between the old and new modules. A compensation coefficient can be calculated, and then the ADC gain parameters can be adjusted. After adjusting the ADC gain parameters, the voltage output of the new reference module, after conversion, will match the system's requirement for the reference voltage, restoring the system's measurement accuracy. After adjustment, record the replacement event, and the equipment will enter normal operating condition. If ΔV > 50ppm, it indicates that the difference between the old and new modules is too large, exceeding the system's internal compensation capability. An alarm can be issued, informing the operator that external calibration or factory maintenance is required.

[0149] This application also provides a baseline recovery method that can be applied to host units.

[0150] like Figure 3 As shown, the baseline recovery method includes steps 310 and 320.

[0151] Step 310: When the interface component is detected to be inserted into the reference module, the calibration parameters stored in the reference module are read through the interface component; the reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor.

[0152] Step 320: Perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor to restore the measurement accuracy of the system.

[0153] According to the reference recovery method of this application, by setting up an independently replaceable reference module and a matching detachable interface component, when the reference voltage source ages or is damaged, there is no need to disassemble and solder the equipment. The reference module can be replaced through the interface component, which simplifies the maintenance process and reduces the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After replacing the reference module, the calibration parameters of the new module can be read through the interface component, and the temperature compensation model in the calibration parameters can be combined with the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters for conversion and compensation. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0154] In some embodiments, the calibration parameters further include at least one of the following: factory calibration value, temperature compensation model, calibration certificate summary, timestamp, and unique serial number of the reference module; the method further includes:

[0155] Perform cyclic redundancy check or digital signature check on the calibration parameters.

[0156] In some embodiments, a conversion compensation is performed based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, including:

[0157] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using a temperature compensation model;

[0158] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0159] If the difference is within the target range, enable the reference voltage of the reference module.

[0160] In some embodiments, the method further includes:

[0161] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0162] The benchmark recovery method provided in this application can be executed by a benchmark recovery device. This application uses an example of a benchmark recovery device executing the benchmark recovery method to illustrate the benchmark recovery device provided in this application.

[0163] This application also provides a reference recovery device.

[0164] like Figure 4 As shown, the reference recovery device includes:

[0165] The reading module 410 is used to read the calibration parameters stored in the reference module through the interface component when the interface component is detected to be inserted into the reference module; the reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor.

[0166] The recovery module 420 is used to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor in order to restore the measurement accuracy of the system.

[0167] According to the reference recovery device of this application, by setting an independently replaceable reference module and a matching detachable interface component, when the reference voltage source ages or is damaged, there is no need to disassemble and solder the equipment. The reference module can be replaced through the interface component, which simplifies the maintenance process and reduces the impact of stress on the stability of the reference. The non-volatile memory integrated in the reference module stores the calibration parameters bound to the module. After the host unit replaces the reference module, it can read the calibration parameters of the new module through the interface component and perform conversion compensation by combining the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters. This can quickly restore the measurement accuracy of the system, thereby improving the measurement accuracy.

[0168] In some embodiments, the reference recovery device further includes a verification module for:

[0169] Perform cyclic redundancy check or digital signature check on the calibration parameters.

[0170] In some embodiments, the recovery module 420 is further configured to:

[0171] Based on the temperature detected by the temperature sensor, the equivalent voltage reference value at the target temperature is calculated using a temperature compensation model;

[0172] Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement.

[0173] If the difference is within the target range, enable the reference voltage of the reference module;

[0174] If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

[0175] The reference recovery device in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or any other device besides a terminal.

[0176] The reference recovery device in this application embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems, such as embedded operating systems. This application embodiment does not specifically limit the specific operating system used.

[0177] In some embodiments, such as Figure 5 As shown, this application embodiment also provides an electronic device 500, including a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the program is executed by the processor 501, it implements the various processes of the above-described baseline recovery method embodiment and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0178] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described baseline recovery method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0179] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0180] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described benchmark recovery method.

[0181] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0182] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described benchmark recovery method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0183] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0184] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0185] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0186] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0187] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0188] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A modular high-precision reference system, characterized in that, include: The system includes an independently replaceable reference module, an interface component that matches the reference module, and a host unit. The reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor. The non-volatile memory stores calibration parameters bound to the reference module. The interface components are detachably connected to the reference module and the host unit, respectively. The host unit is used to read the calibration parameters stored in the non-volatile memory of the replaced reference module through the interface component when the reference module is replaced, and to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor in order to restore the measurement accuracy of the system. The step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes: calculating the equivalent voltage reference value at the target temperature using the temperature compensation model based on the temperature detected by the temperature sensor; Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement; if the difference is within the target range, enable the reference voltage of the reference module.

2. The system according to claim 1, characterized in that, The reference module also includes a buffer amplifier circuit and a protection circuit; The buffer amplifier circuit is used to provide low output impedance to maintain a stable output of the reference voltage. The protection circuit includes an electrostatic discharge circuit and / or a surge protection circuit.

3. The system according to claim 1, characterized in that, The calibration parameters also include at least one of the following: factory calibration value, calibration certificate summary, timestamp, and unique serial number of the reference module.

4. The system according to claim 1, characterized in that, The interface component includes a grounding terminal, a power supply terminal, a signal terminal, and a data communication terminal, wherein the grounding terminal makes electrical contact with the signal terminal in priority; or the interface component includes a sensing terminal for providing remote voltage sensing.

5. The system according to claim 1, characterized in that, The interface component also includes an asymmetric mechanical positioning structure.

6. The system according to claim 1, characterized in that, The host unit includes a microprocessor controller, a parameter reading and compensation unit, and a data verification unit; The microprocessor controller is used to identify the replaced reference module and read the calibration parameters stored in the non-volatile memory through its interface component when the reference module is replaced. The data verification unit is used to perform cyclic redundancy check or digital signature check on the read calibration parameters; The parameter reading and compensation unit is used to perform conversion compensation based on the temperature detected by the temperature sensor and the temperature compensation model in the calibration parameters, in order to restore the measurement accuracy of the system, if the verification is successful.

7. The system according to claim 1, characterized in that, The step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes: If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

8. The system according to claim 1, characterized in that, The host unit is also used for: A log is generated based on the replacement record of the reference module; the replacement record includes the reference voltage ratio, temperature, timestamp, and unique serial numbers of the reference module before and after replacement.

9. A benchmark recovery method, characterized in that, include: When the insertion of the interface component into the reference module is detected, the calibration parameters stored in the reference module are read through the interface component; The reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor; The system's measurement accuracy is restored by performing a conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor. The step of performing conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor includes: calculating the equivalent voltage reference value at the target temperature using the temperature compensation model based on the temperature detected by the temperature sensor; Compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement; if the difference is within the target range, enable the reference voltage of the reference module.

10. The method according to claim 9, characterized in that, The calibration parameters also include at least one of the following: factory calibration value, calibration certificate summary, timestamp, and unique serial number of the reference module; the method further includes: The calibration parameters are subjected to cyclic redundancy check or digital signature check.

11. The method according to claim 9, characterized in that, The method further includes: If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

12. A reference recovery device, characterized in that, include: A reading module is used to read the calibration parameters stored in the reference module through the interface component when the insertion of the interface component into the reference module is detected. The reference module includes a reference voltage source, a non-volatile memory, and a temperature sensor; The recovery module is used to perform conversion compensation based on the temperature compensation model in the calibration parameters and the temperature detected by the temperature sensor, so as to restore the measurement accuracy of the system; The recovery module is further configured to: calculate the equivalent voltage reference value at the target temperature using the temperature compensation model based on the temperature detected by the temperature sensor; compare the difference between the equivalent voltage reference value and the reference value; the reference value is the archived value of the reference module before replacement; and enable the reference voltage of the reference module if the difference is within the target range.

13. The apparatus according to claim 12, characterized in that, The recovery module is also used for: If the difference exceeds the target range, a compensation coefficient is calculated based on the ratio of the equivalent voltage reference value to the reference value, and the reference gain of the analog-to-digital converter is adjusted based on the compensation coefficient.

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