Programmable voltage reference source based on temperature dynamic compensation and control method thereof

Abstract

The invention belongs to the technical field of power supply circuits, and particularly relates to a programmable voltage reference source based on temperature dynamic compensation and a control method thereof. According to the method, when the temperature of the voltage reference source is lower than the working temperature, the voltage reference source is heated, so that the temperature of the voltage reference source is maintained at the working temperature; when the temperature of the voltage reference source is maintained at the working temperature, the output voltage of a digital-to-analog conversion module in the voltage reference source is adjusted according to the output voltage demand value, and if it is detected that the temperature of the voltage reference source cannot reach the working temperature, an error compensation voltage value is determined according to the real-time temperature of the voltage reference source; and the output voltage of the digital-to-analog conversion module is adjusted according to the error compensation voltage value and the output voltage demand value, so that the voltage output by the voltage reference source is the output voltage demand value, and high-precision stable output of the voltage reference source at low cost is realized.

Description

Technical Field

[0001] This invention belongs to the field of power supply circuit technology, specifically relating to a programmable voltage reference source based on dynamic temperature compensation and its control method. Background Technology

[0002] As a core module of electronic systems, voltage references play a crucial role in power management, sensor signal conditioning, and data conversion. Traditional voltage references typically employ fixed structures such as bandgap reference circuits or Zener diodes, with their output voltage determined by device parameters and bias current, exhibiting temperature stability and low noise characteristics. However, as electronic devices evolve towards intelligence and multifunctionality, traditional voltage references face several prominent issues: First, the conflict between fixed voltage output and dynamic application requirements is increasingly evident. The need for flexible access to multiple voltage levels in different operating modes for some high-precision electrical measurement instruments forces the system to rely on additional circuitry for voltage conversion, leading to a simultaneous increase in hardware complexity and error accumulation. Second, insufficient environmental adaptability is a common pain point. Temperature drift and power supply voltage fluctuations directly affect the output accuracy of the voltage reference, especially under extreme temperature or low-voltage conditions, where the voltage reference is prone to instability or even failure. Furthermore, the irreconcilable contradiction between power consumption and accuracy further exacerbates the technical dilemma. High-precision voltage references require large bias currents, while low-power voltage reference designs often sacrifice accuracy and lack dynamic energy efficiency optimization capabilities. Therefore, traditional voltage reference sources with fixed architecture and static design paradigms cannot achieve a balance between high output voltage accuracy and low cost in multi-dimensional performance.

[0003] With technological advancements, Chinese patent application CN115718519A discloses a portable, high-precision reference voltage source control device, comprising a system control unit, a reference source unit, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), an output buffer unit, a communication interface unit, an LCD display unit, and a DC power supply unit. The DAC converts the digital set voltage value provided by the system control unit into an analog set voltage, which is then buffered and amplified by the output buffer unit before being output as the reference voltage. The ADC collects the reference voltage at the output of the reference voltage source control device in real time, converts it into a digital reference voltage value, and feeds it back to the system control unit. Upon receiving this digital reference voltage value, the system control unit compares it with a pre-set reference voltage value and adjusts the digital set voltage value based on the comparison result, achieving closed-loop control of the output reference voltage. This method achieves high-precision adjustable output of the reference voltage through a closed-loop control loop. However, this method heavily relies on the accuracy and temperature characteristics of the DAC and ADC units, requiring the selection of components with high temperature coefficients and high conversion accuracy. This strong dependence on components results in a relatively high cost for the voltage reference source. At the same time, under extreme operating temperature conditions, the output voltage may not be able to be adjusted to the target value, resulting in poor accuracy of the output voltage data. Summary of the Invention

[0004] The purpose of this invention is to provide a programmable voltage reference source and its control method based on dynamic temperature compensation, so as to solve the problem that existing power reference sources cannot simultaneously achieve low cost and high precision.

[0005] To address the aforementioned technical problems, this invention provides a control method for a programmable voltage reference source based on dynamic temperature compensation, comprising: heating the voltage reference source when its temperature is lower than the operating temperature; stopping heating the voltage reference source if the temperature is detected to have reached the operating temperature, thereby maintaining the voltage reference source temperature at the operating temperature; adjusting the output voltage of the digital-to-analog converter module within the voltage reference source according to the required output voltage value while the voltage reference source temperature is maintained at the operating temperature, so that the voltage output by the voltage reference source is the required output voltage value; and determining an error compensation voltage value based on the real-time temperature of the voltage reference source, and adjusting the output voltage of the digital-to-analog converter module according to the error compensation voltage value and the required output voltage value, so that the voltage output by the voltage reference source is the required output voltage value.

[0006] Furthermore, the error compensation voltage is obtained through pre-calibration. The calibration process is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the set output voltage, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

[0007] Furthermore, the output voltage of the digital-to-analog converter module is determined according to the register parameters configured in the digital-to-analog converter module, and the register parameters are configured through a programmable hardware and software control module.

[0008] Furthermore, the output voltage of the digital-to-analog converter module within the voltage reference source is adjusted by modifying the code related to the register settings of the digital-to-analog converter module in the programmable hardware and software control module software code through software programming.

[0009] Furthermore, the method for adjusting the output voltage of the digital-to-analog converter module within the voltage reference source is as follows: the controller connected to the programmable hardware and software control module notifies the programmable hardware and software control module to modify the register settings of the digital-to-analog converter module based on its variable output voltage control program logic.

[0010] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. When the temperature of the voltage reference source is lower than the operating temperature, the voltage reference source is heated. When the temperature of the voltage reference source reaches the operating temperature, the heating of the voltage reference source is stopped, so that the temperature of the voltage reference source is maintained under constant operating conditions, thereby avoiding the influence of temperature on the components inside the voltage reference source and ensuring high-precision output of the voltage reference source. When the temperature of the voltage reference source cannot reach the operating temperature, that is, when the voltage reference source is in an extreme environment, an error compensation strategy is adopted. The error compensation voltage is determined according to the current ambient temperature, and the output voltage of the digital-to-analog conversion module is adjusted according to the error compensation voltage value and the output voltage requirement value, so that the voltage output by the voltage reference source is the output voltage requirement value, thereby reducing the impact of extreme environment on the accuracy of the voltage reference source, so that the output voltage data accuracy is still high under extreme operating temperature conditions. Moreover, this invention only needs to perform temperature detection and heating to ensure the accuracy of the output voltage, realizing high-precision and stable output at low cost.

[0011] To address the aforementioned technical problems, this invention also provides a programmable voltage reference source based on dynamic temperature compensation, comprising a reference voltage reference module and a digital-to-analog converter module. The reference voltage reference module provides a reference voltage input to the digital-to-analog converter module. It also includes a constant temperature control module, a temperature detection module, and a programmable hardware and software control module. The temperature detection module detects the temperature of the voltage reference source. The constant temperature control module heats the voltage reference source when its temperature is below the operating temperature and stops heating when the temperature reaches the operating temperature. The programmable hardware and software control module adjusts the output voltage of the digital-to-analog converter module within the voltage reference source according to the required output voltage value when the voltage reference source temperature is maintained at the operating temperature, ensuring that the voltage output by the voltage reference source matches the required output voltage value. When the voltage reference source temperature cannot reach the operating temperature, it determines an error compensation voltage value based on the real-time temperature of the voltage reference source and adjusts the output voltage of the digital-to-analog converter module according to the error compensation voltage value and the required output voltage value, ensuring that the voltage output by the voltage reference source matches the required output voltage value.

[0012] Furthermore, the error compensation voltage is obtained through pre-calibration. The calibration process is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the set output voltage, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

[0013] Furthermore, the output voltage of the digital-to-analog converter module is determined according to the register parameters configured in the digital-to-analog converter module, and the register parameters are configured through a programmable hardware and software control module.

[0014] Furthermore, the output voltage of the digital-to-analog converter module within the voltage reference source can be adjusted by: modifying the code related to the digital-to-analog converter module register settings in the software code of the programmable hardware and software control module through software programming; or by having the controller connected to the programmable hardware and software control module notify the programmable hardware and software control module to modify the digital-to-analog converter module register settings based on its variable output voltage control program logic.

[0015] Furthermore, the programmable voltage reference source is encased in insulating material and then placed inside an electromagnetic shielding shell, with thermal insulation material filling the space between the electromagnetic shielding shell and the insulating material.

[0016] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. The voltage reference source provided by this invention can heat the voltage reference source when its temperature is lower than the operating temperature, and stop heating the voltage reference source when its temperature reaches the operating temperature, so that the voltage reference source temperature is maintained under constant temperature operating conditions, thereby avoiding the influence of temperature on the components inside the voltage reference source and ensuring high-precision output of the voltage reference source; when the voltage reference source temperature cannot reach the operating temperature, that is, when the voltage reference source is in an extreme environment, an error compensation strategy is adopted. The error compensation voltage is determined according to the current ambient temperature, and the output voltage of the digital-to-analog conversion module is adjusted according to the error compensation voltage value and the output voltage requirement value, so that the voltage output by the voltage reference source is the output voltage requirement value, thereby reducing the influence of extreme environment on the accuracy of the voltage reference source, so that the output voltage data accuracy is still high under extreme operating temperature conditions. Moreover, this invention only needs to perform temperature detection and heating to ensure the accuracy of the output voltage, realizing high-precision and stable output at low cost. Attached Figure Description

[0017] Figure 1 This is a block diagram of the programmable voltage reference source design based on dynamic temperature compensation according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the programmable voltage reference source based on dynamic temperature compensation of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] This invention controls the voltage reference source through constant temperature control and error compensation strategies under extreme environments, achieving high-precision and stable output of the voltage reference source at low cost.

[0020] Voltage reference source implementation method This invention provides a programmable voltage reference source based on dynamic temperature compensation, such as... Figure 1 As shown, it includes a reference voltage reference module (high-stability reference voltage reference module), a digital-to-analog conversion module (high-resolution digital-to-analog conversion module), a temperature detection module, a constant temperature control module, and a programmable hardware and software control module.

[0021] The reference voltage reference module provides a reference voltage for the entire voltage reference source and also serves as an external reference voltage input for the digital-to-analog converter module. The reference voltage reference module may employ a voltage reference chip, or devices such as Zener diodes and their associated circuitry.

[0022] The output of the digital-to-analog converter (DAC) serves as the output of the entire voltage reference source. It is connected to the programmable hardware and software control module (MPK control module) and used to adjust the input reference voltage based on the DAC's output voltage set by the MPK control module before outputting the required voltage. It includes a high-precision voltage output DAC and its associated circuitry. In one embodiment, the DAC provides a standard SPI communication interface for connection to the MPK control module. Other communication connection methods can be used as needed; no restrictions are placed here.

[0023] The temperature control module heats the voltage reference source when its temperature is below the operating temperature and stops heating when the voltage reference source reaches the operating temperature. The module includes multiple heating resistors and their associated power supplies, as well as a power supply for the temperature control module itself. The resistor values ​​are selected based on the reference source's operating temperature; temperature control of the voltage reference source is achieved through resistor heating and power supply control.

[0024] The temperature detection module is used to detect the temperature of the voltage reference source and provide the temperature information to the programmable hardware and software control module. The temperature detection module can use a temperature sensor to monitor temperature changes throughout the voltage reference source system.

[0025] The programmable hardware and software control module is connected to the digital-to-analog converter (DAC) module. It controls the DAC module to output different voltages via software programming, thereby realizing the design of a programmable transformer reference. Simultaneously, it monitors the temperature change of the voltage reference source and adjusts the voltage output of the DAC module and the power supply of the temperature control module based on the temperature changes and a pre-set temperature compensation algorithm. In one embodiment, the programmable hardware and software control module is connected to the DAC module via an SPI communication interface and to the temperature sensor via an RS232 interface. Other communication connection methods can be used as needed; no restrictions are imposed here. The programmable hardware and software control module employs a DSP and its auxiliary circuitry, or an FPGA and its auxiliary circuitry.

[0026] Specifically, the control process of the voltage reference source is as follows: A voltage reference source requires a certain warm-up time to operate normally. When the voltage reference source is powered on, if its temperature is lower than the operating temperature, the heating resistor in the temperature control module starts working to heat the voltage reference source. Once the voltage reference source reaches the operating temperature, the programmable hardware and software control module cuts off the power to the temperature control module based on temperature information detected by the temperature sensor, causing the temperature control module to stop working. When the voltage reference source temperature falls below the operating temperature, the programmable hardware and software control module turns the power back on to the temperature control module, allowing it to heat the voltage reference source and maintain its temperature under constant conditions.

[0027] When the voltage reference source is kept at its operating temperature, the programmable hardware and software control module adjusts the output voltage of the digital-to-analog converter module inside the voltage reference source according to the output voltage requirement value, so that the voltage output by the voltage reference source is the output voltage requirement value.

[0028] When the voltage reference source cannot reach its operating temperature, such as when external interference prevents the voltage reference source from reaching its operating temperature, the programmable hardware and software control module sets the output voltage value of the digital-to-analog converter module based on the real-time temperature of the voltage reference source detected by the temperature sensor and through a pre-set temperature compensation algorithm. This ensures that the voltage output by the voltage reference source is the required output voltage value, thereby reducing the impact of ambient temperature on the accuracy of the output voltage.

[0029] The pre-set temperature compensation algorithm refers to the error compensation voltage model corresponding to each operating temperature that has been calibrated in advance. That is, by finding the corresponding error compensation voltage at each pre-calibrated operating temperature, the calibration process for the error compensation voltage is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the output voltage set by the programmable hardware and software control module, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

[0030] The output voltage of the analog-to-analog converter is determined based on the register parameters configured in the digital-to-analog converter. These register parameters are configured via a programmable hardware and software control module. The workflow for controlling the output voltage using the voltage reference source is as follows: After the voltage reference source is powered on, the DAC and DSP / FPGA chips initialize. The DAC has a built-in power-on reset circuit to ensure that the DAC output is 0V upon power-on. After the DSP / FPGA chip initialization is complete, the register parameters of the DAC chip are configured according to the output voltage requirement. After configuration, the DAC outputs the corresponding voltage based on the register configuration results. Simultaneously, the programmable hardware and software control module adjusts the output voltage of the high-resolution digital-to-analog converter module in real time based on the temperature sensor signal. The output voltage value of the voltage reference source can be adjusted in the following two ways: 1. Fixed Output Voltage Type: This is achieved by modifying the code related to the digital-to-analog converter (DAC) register settings in the programmable hardware / software control module's software code. Specifically, it involves modifying the DAC chip register settings in the DSP / FPGA chip's software code to pre-set the voltage based on the actual output voltage and the DAC chip's reference voltage.

[0031] 2. Variable Output Voltage During Operation: The external controller connected to the programmable hardware / software control module notifies the programmable hardware / software control module to modify the register settings of the digital-to-analog converter module. The controller has a program logic for variable output voltage adjustment. For example, this can be achieved by connecting an external microcontroller. The microcontroller adds variable output voltage adjustment program logic and periodically notifies the DSP / FPGA chip according to actual needs, thereby modifying the DAC chip register settings and enabling adjustable output voltage during operation.

[0032] Furthermore, the voltage reference source is entirely encased in insulating material and housed within an electromagnetic shielding shell, with thermal insulation material filling the space between the shielding shell and the insulating material. For example... Figure 2 As shown, the entire voltage reference source circuit is placed within an electromagnetic shielding enclosure to eliminate external electromagnetic interference and further reduce noise coupling and interference from various components throughout the circuit. Simultaneously, an insulating material is wrapped around the entire voltage reference source circuit, and thermal insulation material is filled within both the insulating material and the electromagnetic shielding enclosure to prevent short circuits and maintain overall temperature stability of the voltage reference source, achieving high-precision and highly stable voltage output.

[0033] Method Implementation The present invention discloses a control method for a programmable voltage reference source based on dynamic temperature compensation. The method is implemented based on a programmable voltage reference source based on dynamic temperature compensation. The voltage reference source includes a reference voltage reference module (high-stability reference voltage reference module), a digital-to-analog conversion module (high-resolution digital-to-analog conversion module), a temperature detection module, a constant temperature control module, and a programmable hardware and software control module.

[0034] The reference voltage reference module provides a reference voltage for the entire voltage reference source and also serves as an external reference voltage input for the digital-to-analog converter module. The reference voltage reference module may employ a voltage reference chip, or devices such as Zener diodes and their associated circuitry.

[0035] The output of the digital-to-analog converter (DAC) serves as the output of the entire voltage reference source. It is connected to the programmable hardware and software control module (MPK control module) and used to adjust the input reference voltage based on the DAC's output voltage set by the MPK control module before outputting the required voltage. It includes a high-precision voltage output DAC and its associated circuitry. In one embodiment, the DAC provides a standard SPI communication interface for connection to the MPK control module. Other communication connection methods can be used as needed; no restrictions are placed here.

[0036] The temperature control module heats the voltage reference source when its temperature is below the operating temperature and stops heating when the voltage reference source reaches the operating temperature. The module includes multiple heating resistors and their associated power supplies, as well as a power supply for the temperature control module itself. The resistor values ​​are selected based on the reference source's operating temperature; temperature control of the voltage reference source is achieved through resistor heating and power supply control.

[0037] The temperature detection module is used to detect the temperature of the voltage reference source and provide the temperature information to the programmable hardware and software control module. The temperature detection module can use a temperature sensor to monitor temperature changes throughout the voltage reference source system.

[0038] The programmable hardware and software control module is connected to the digital-to-analog converter (DAC) module. It controls the DAC module to output different voltages via software programming, thereby realizing the design of a programmable transformer reference. Simultaneously, it monitors the temperature change of the voltage reference source and adjusts the voltage output of the DAC module and the power supply of the temperature control module based on the temperature changes and a pre-set temperature compensation algorithm. In one embodiment, the programmable hardware and software control module is connected to the DAC module via an SPI communication interface and to the temperature sensor via an RS232 interface. Other communication connection methods can be used as needed; no restrictions are imposed here. The programmable hardware and software control module employs a DSP and its auxiliary circuitry, or an FPGA and its auxiliary circuitry.

[0039] Control methods for programmable voltage reference sources based on dynamic temperature compensation include: 1. When the temperature of the voltage reference source is lower than the operating temperature, the voltage reference source is heated.

[0040] A voltage reference source requires a certain warm-up time to operate normally. When the voltage reference source is powered on, if its temperature is lower than the operating temperature, the heating resistor in the temperature control module starts working to heat the voltage reference source. Once the voltage reference source reaches the operating temperature, the programmable hardware and software control module cuts off the power to the temperature control module based on temperature information detected by the temperature sensor, causing the temperature control module to stop working. When the voltage reference source temperature falls below the operating temperature, the programmable hardware and software control module turns the power back on to the temperature control module, allowing it to heat the voltage reference source and maintain its temperature under constant conditions.

[0041] 2. If the temperature of the voltage reference source is detected to have reached the operating temperature, heating of the voltage reference source is stopped to maintain the temperature of the voltage reference source at the operating temperature. When the temperature of the voltage reference source is maintained at the operating temperature, the output voltage of the digital-to-analog converter module in the voltage reference source is adjusted according to the output voltage requirement value so that the voltage output by the voltage reference source is the output voltage requirement value.

[0042] When the voltage reference source is kept at its operating temperature, the programmable hardware and software control module adjusts the output voltage of the digital-to-analog converter module inside the voltage reference source according to the output voltage requirement value, so that the voltage output by the voltage reference source is the output voltage requirement value.

[0043] 3. If the temperature of the voltage reference source is detected to be unable to reach the operating temperature, the error compensation voltage value is determined based on the real-time temperature of the voltage reference source. The output voltage of the digital-to-analog converter module is adjusted according to the error compensation voltage value and the output voltage requirement value so that the voltage output by the voltage reference source is the output voltage requirement value.

[0044] When the voltage reference source cannot reach its operating temperature, such as when external interference prevents the voltage reference source from reaching its operating temperature, the programmable hardware and software control module sets the output voltage value of the digital-to-analog converter module based on the real-time temperature of the voltage reference source detected by the temperature sensor and through a pre-set temperature compensation algorithm. This ensures that the voltage output by the voltage reference source is the required output voltage value, thereby reducing the impact of ambient temperature on the accuracy of the output voltage.

[0045] The pre-set temperature compensation algorithm refers to the error compensation voltage model corresponding to each operating temperature that has been calibrated in advance. That is, by finding the corresponding error compensation voltage at each pre-calibrated operating temperature, the calibration process for the error compensation voltage is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the output voltage set by the programmable hardware and software control module, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

[0046] The output voltage of the digital-to-analog converter module is determined according to the register parameters configured in the digital-to-analog converter module, and the register parameters are configured through a programmable hardware and software control module.

[0047] After the voltage reference source is powered on, the DAC and DSP / FPGA chips initialize. The DAC has a built-in power-on reset circuit to ensure that the DAC output is 0V upon power-on. After the DSP / FPGA chip initialization is complete, the register parameters of the DAC chip are configured according to the output voltage requirement. After configuration, the DAC outputs the corresponding voltage based on the register configuration results. Simultaneously, the programmable hardware and software control module adjusts the output voltage of the high-resolution digital-to-analog converter module in real time based on the temperature sensor signal. The output voltage value of the voltage reference source can be adjusted in the following two ways: 1. Fixed Output Voltage Type: This is achieved by modifying the code related to the digital-to-analog converter (DAC) register settings in the programmable hardware / software control module's software code. Specifically, it involves modifying the DAC chip register settings in the DSP / FPGA chip's software code to pre-set the voltage based on the actual output voltage and the DAC chip's reference voltage.

[0048] 2. Variable Output Voltage During Operation: The external controller connected to the programmable hardware / software control module notifies the programmable hardware / software control module to modify the register settings of the digital-to-analog converter module. The controller has a program logic for variable output voltage adjustment. For example, this can be achieved by connecting an external microcontroller. The microcontroller adds variable output voltage adjustment program logic and periodically notifies the DSP / FPGA chip according to actual needs, thereby modifying the DAC chip register settings and enabling adjustable output voltage during operation.

[0049] Furthermore, the voltage reference source can be entirely encased in insulating material and placed within an electromagnetic shielding enclosure, with thermal insulation material filling the space between the shielding enclosure and the insulating material. By placing the entire voltage reference source circuit within the electromagnetic shielding enclosure, external electromagnetic interference is eliminated, further reducing noise coupling and interference from various components throughout the circuit. Simultaneously, covering the entire voltage reference source circuit with an insulating material and filling the space between the insulating material and the electromagnetic shielding enclosure with thermal insulation material prevents short circuits with the shielding enclosure, maintains overall temperature stability of the voltage reference source, and achieves high-precision, highly stable voltage output.

[0050] This invention integrates core circuits such as temperature detection, constant temperature control, high-precision voltage reference, high-precision DAC, and programmable hardware and software control. It can meet the multi-voltage requirements of high-precision voltage reference source devices in different operating modes, reducing the hardware complexity caused by adding extra circuits for voltage conversion and achieving high precision at low cost. The voltage reference source is designed in modules, each independent and unaffected by others. Furthermore, the core components of each module (voltage reference, DAC, DSP, FPGA, etc.) can be replaced with similar components, enhancing its applicability. In addition, insulation, heat insulation, and electromagnetic shielding layers are added, resulting in strong overall system stability, strong resistance to external interference, and ensuring high-precision and highly stable variable voltage output.

Claims

1. A control method for a programmable voltage reference source based on dynamic temperature compensation, characterized in that, include: When the temperature of the voltage reference source is lower than the operating temperature, the voltage reference source is heated. If the temperature of the voltage reference source is detected to have reached the operating temperature, heating of the voltage reference source is stopped to maintain the temperature of the voltage reference source at the operating temperature. When the temperature of the voltage reference source is maintained at the operating temperature, the output voltage of the digital-to-analog converter module inside the voltage reference source is adjusted according to the output voltage demand value so that the voltage output by the voltage reference source is the output voltage demand value. If the temperature of the voltage reference source is detected to be below the operating temperature, the error compensation voltage value is determined based on the real-time temperature of the voltage reference source. The output voltage of the digital-to-analog converter is then adjusted based on the error compensation voltage value and the output voltage requirement value, so that the voltage output by the voltage reference source is the required output voltage value.

2. The control method for a programmable voltage reference source based on dynamic temperature compensation according to claim 1, characterized in that, The error compensation voltage is obtained through pre-calibration. The calibration process is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the set output voltage, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

3. The control method for a programmable voltage reference source based on dynamic temperature compensation according to claim 1 or 2, characterized in that, The output voltage of the digital-to-analog converter module is determined according to the register parameters configured in the digital-to-analog converter module. The register parameters are configured through a programmable hardware and software control module.

4. The control method for a programmable voltage reference source based on dynamic temperature compensation according to claim 3, characterized in that, The method to adjust the output voltage of the digital-to-analog converter module in the voltage reference source is to modify the code related to the register settings of the digital-to-analog converter module in the software code of the programmable hardware and software control module through software programming.

5. The control method for a programmable voltage reference source based on dynamic temperature compensation according to claim 3, characterized in that, The method for adjusting the output voltage of the digital-to-analog converter module within the voltage reference source is as follows: the controller connected to the programmable hardware and software control module notifies the programmable hardware and software control module to modify the register settings of the digital-to-analog converter module based on its variable output voltage control program logic.

6. A programmable voltage reference source based on temperature dynamic compensation, comprising a reference voltage reference module and a digital-to-analog converter module, wherein the reference voltage reference module provides a reference voltage input to the digital-to-analog converter module; characterized in that, It also includes a constant temperature control module, a temperature detection module, and a programmable hardware and software control module. The temperature detection module is used to detect the temperature of the voltage reference source; the constant temperature control module is used to heat the voltage reference source when its temperature is lower than the operating temperature and to stop heating when the voltage reference source reaches the operating temperature; the programmable hardware and software control module is used to adjust the output voltage of the digital-to-analog converter module in the voltage reference source according to the output voltage requirement value when the voltage reference source temperature is maintained at the operating temperature, so that the voltage output by the voltage reference source is the output voltage requirement value. When the temperature of the voltage reference source cannot reach the operating temperature, the error compensation voltage value is determined based on the real-time temperature of the voltage reference source. The output voltage of the digital-to-analog converter is then adjusted based on the error compensation voltage value and the output voltage requirement value, so that the voltage output by the voltage reference source is the output voltage requirement value.

7. The programmable voltage reference source based on dynamic temperature compensation according to claim 6, characterized in that, The error compensation voltage is obtained through pre-calibration. The calibration process is as follows: test the actual output voltage of the digital-to-analog converter module in the voltage reference source at each operating temperature, calculate the deviation between the actual output voltage of the digital-to-analog converter module and the set output voltage, determine the corresponding compensation coefficient based on the deviation, and determine the error compensation voltage based on the compensation coefficient.

8. The programmable voltage reference source based on dynamic temperature compensation according to claim 6 or 7, characterized in that, The output voltage of the digital-to-analog converter module is determined according to the register parameters configured in the digital-to-analog converter module. The register parameters are configured through a programmable hardware and software control module.

9. The programmable voltage reference source based on dynamic temperature compensation according to claim 8, characterized in that, The output voltage of the digital-to-analog converter module within the voltage reference source can be adjusted in two ways: by modifying the code related to the digital-to-analog converter module register settings in the software code of the programmable hardware and software control module through software programming; or by having an external controller of the programmable hardware and software control module notify the programmable hardware and software control module to modify the digital-to-analog converter module register settings based on its variable output voltage control program logic.

10. The programmable voltage reference source based on dynamic temperature compensation according to claim 6 or 7, characterized in that, The programmable voltage reference source is encased in insulating material and then placed inside an electromagnetic shielding shell, with thermal insulation material filling the space between the electromagnetic shielding shell and the insulating material.

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