A two-way temperature control system for a temperature-sensitive element

Abstract

This application discloses a dual-channel temperature control system for a temperature-sensitive element, including a data acquisition module, a control module, and a temperature drive module. The data acquisition module acquires the temperature of the temperature-sensitive element and outputs high-sensitivity temperature information and low-sensitivity temperature information. The control module controls the temperature of the temperature-sensitive element to a first precision of the target temperature based on the real-time low-sensitivity temperature information, and then controls the temperature of the temperature-sensitive element to a second precision of the target temperature based on the real-time high-sensitivity temperature information; wherein the first precision is lower than the second precision. The data acquisition module includes an adjustable resistor. This application adjusts the temperature control range through the adjustable resistor, thereby achieving wide-range temperature control. Simultaneously, the dual-channel temperature acquisition and dual-precision temperature control improve control accuracy, thus significantly enhancing the working environment and performance of the temperature-sensitive element and ensuring stable and reliable operation in high-precision application scenarios.

Description

Technical Field

[0001] This application relates to temperature control, and more specifically, to a dual-channel temperature control system for a temperature-sensitive element. Background Technology

[0002] Temperature measurement strategies based on thermistors have been developed for decades. To improve the temperature measurement accuracy of thermistors and ensure their stable and reliable operation in various application scenarios, many different methods have been developed to control the temperature stability of thermistors, such as the two-wire method, the four-wire method (Kelvin method), the balanced DC bridge, and the unbalanced AC bridge. Among these, the two-wire method has been replaced by the four-wire method in some high-precision measurements due to accuracy issues. However, in current technologies, temperature control methods based on thermistors cannot simultaneously meet the requirements of both a wide temperature control range and high-precision control. Summary of the Invention

[0003] This application provides a dual-channel temperature control system for a temperature-sensitive element. The temperature control range is adjusted by an adjustable resistor, thereby achieving wide-range temperature control. At the same time, the control accuracy is improved by dual-channel temperature acquisition and dual-precision temperature control. As a result, the working environment and performance of the temperature-sensitive element are significantly improved, ensuring its stable and reliable operation in high-precision application scenarios.

[0004] This application provides a dual-channel temperature control system for a temperature-sensitive element, including a data acquisition module, a control module, and a temperature drive module;

[0005] The acquisition module acquires the temperature of the temperature-sensitive element and outputs high-sensitivity temperature information and low-sensitivity temperature information.

[0006] The control module controls the temperature drive module to perform low-sensitivity temperature adjustment based on real-time low-sensitivity temperature information. After the temperature of the temperature-sensitive element is controlled to the first precision of the target temperature (i.e., the temperature fluctuation of the temperature-sensitive element is controlled within a certain range), the control module controls the temperature drive module to perform high-sensitivity temperature adjustment based on real-time high-sensitivity temperature information, so that the temperature of the temperature-sensitive element is controlled to the second precision of the target temperature (i.e., the temperature fluctuation of the temperature-sensitive element is controlled within a finer range).

[0007] The first precision is lower than the second precision; the acquisition module includes an adjustable resistor.

[0008] Preferably, the acquisition module includes a temperature sensor, a high-sensitivity temperature acquisition module, and a low-sensitivity temperature acquisition module;

[0009] The temperature sensor is used to collect the temperature of the temperature-sensitive element. The first end of the temperature sensor is grounded, and the second end of the temperature sensor serves as the input signal for the high-sensitivity temperature acquisition module and the low-sensitivity temperature acquisition module.

[0010] Preferably, the high-sensitivity temperature acquisition module is a differential amplifier circuit. In the differential amplifier circuit, the non-inverting input terminal of the operational amplifier is connected to the second terminal of the temperature sensor, the inverting input terminal of the operational amplifier is connected to the first terminal of the third resistor, the second terminal of the third resistor is connected to the first terminal of the first resistor and the first terminal of the fourth resistor, the second terminal of the fourth resistor is grounded, and the second terminal of the first resistor is connected to the positive terminal of the regulated power supply.

[0011] Preferably, the low-sensitivity temperature acquisition module is a voltage follower. The input terminal of the voltage follower is connected to the first terminal of the fifth resistor. The second terminal of the fifth resistor is connected to the second terminal of the temperature sensor and the first terminal of the second resistor. The second terminal of the second resistor is connected to the positive terminal of the regulated power supply.

[0012] Preferably, the first resistor and the second resistor are adjustable resistors.

[0013] Preferably, the first resistor is the first load resistor of the first channel of the digital potentiometer, and the second resistor is the second load resistor of the second channel of the digital potentiometer.

[0014] Preferably, the resistance value and the second accuracy of the second resistor are determined based on the target temperature of the temperature-sensitive element.

[0015] Preferably, the resistance value of the first resistor is determined based on the resistance values ​​of the second resistor and the fourth resistor.

[0016] Preferably, the temperature sensor is a thermistor.

[0017] Preferably, the temperature drive module is a thermoelectric cooler.

[0018] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0020] Figure 1 The control principle diagram of the dual-channel temperature control system for the temperature-sensitive element provided in this application;

[0021] Figure 2 The circuit diagram of the acquisition module provided in this application;

[0022] Figure 3 The three-dimensional image obtained according to formula (1) is provided for this application;

[0023] Figure 4 A flowchart of the dual-channel temperature control of the temperature-sensitive element provided in this application;

[0024] Figure 5 The temperature fluctuation and acquisition accuracy within the temperature acquisition range provided in this application;

[0025] Figure 6 The diagram shows the effect of single-loop PID control provided in this application;

[0026] Figure 7 The diagram shows the effect of the dual-loop PID control provided in this application. Detailed Implementation

[0027] Various exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] This application provides a dual-channel temperature control system for a temperature-sensitive element. The temperature control range is adjusted by an adjustable resistor, thereby achieving wide-range temperature control. At the same time, the control accuracy is improved by dual-channel temperature acquisition and dual-precision temperature control. As a result, the working environment and performance of the temperature-sensitive element are significantly improved, ensuring its stable and reliable operation in high-precision application scenarios.

[0032] like Figure 1 As shown, the dual-channel temperature control system for the temperature-sensitive element provided in this application includes a data acquisition module, a control module, and a temperature drive module.

[0033] The acquisition module acquires the temperature of the temperature-sensitive element and outputs high-sensitivity and low-sensitivity temperature information. The acquisition module includes an adjustable resistor.

[0034] The temperature drive module is used to heat or cool the temperature-sensitive element, enabling dynamic adjustment of its real-time temperature. The control module converts the low-sensitivity temperature information output in real-time from the acquisition module into a digital signal (ADC analog-to-digital conversion), and performs low-sensitivity PID calculations based on this information. The obtained low-sensitivity control information is then used to control the temperature drive module for low-sensitivity temperature regulation. When the temperature drive module controls the temperature of the temperature-sensitive element to the first precision of the target temperature (i.e., temperature fluctuations are controlled within a certain range), low-sensitivity temperature control is complete. After the low-sensitivity control stabilizes, the control module converts the high-sensitivity temperature information output in real-time from the acquisition module into a digital signal, and performs high-sensitivity PID calculations based on this information. The obtained high-sensitivity control information is then used to control the temperature drive module for high-sensitivity temperature regulation, controlling the temperature of the temperature-sensitive element to the second precision of the target temperature (i.e., temperature fluctuations are controlled within a finer range). At this point, high-sensitivity temperature control is complete. The first precision is lower than the second precision.

[0035] The control module outputs a pulse width modulation (PWM) signal and a voltage signal with an appropriate duty cycle to the temperature drive module to drive the temperature drive module.

[0036] As one example, the temperature drive module is a thermoelectric cooler (TEC).

[0037] As an example, the control module is a field-programmable gate array (FPGA), which includes a main program, a low-sensitivity PID control program, and a high-sensitivity PID control program.

[0038] As an example, such as Figure 2 As shown, the acquisition module includes a temperature sensor, a high-sensitivity temperature acquisition module, and a low-sensitivity temperature acquisition module.

[0039] The temperature sensor is used to collect the temperature of the temperature-sensitive element. The first end of the temperature sensor is grounded, and the second end of the temperature sensor serves as the input signal for the high-sensitivity temperature acquisition module and the low-sensitivity temperature acquisition module.

[0040] As an example, such as Figure 2 As shown, the temperature sensor is a thermistor, such as a negative temperature coefficient thermistor (NTC). NTCs are characterized by low cost, small size, and wide measurement range, therefore, this application can perform temperature control of the thermistor over a wide temperature range.

[0041] As an example, such as Figure 2 As shown, the low-sensitivity temperature acquisition module is a voltage follower. The input terminal of the voltage follower (the non-inverting input terminal of the operational amplifier 4) is connected to the first terminal of the fifth resistor R5. The second terminal of the fifth resistor R5 is connected to the second terminal of the temperature sensor NTC and the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the positive terminal Vref of the regulated power supply.

[0042] like Figure 2 As shown, the second terminal of the temperature sensor NTC is also connected to capacitor C2, and the other terminal of capacitor C2 is grounded. Capacitor C2 acts as a DC filter for the low-sensitivity temperature acquisition module. The output terminal of operational amplifier 4 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is grounded.

[0043] As an example, such as Figure 2 As shown, the high-sensitivity temperature acquisition module is a nonlinear amplifier circuit, specifically a differential amplifier circuit. In the differential amplifier circuit, the non-inverting input terminal of operational amplifier 3 is connected to the second terminal of the temperature sensor NTC, the inverting input terminal of operational amplifier 3 is connected to the first terminal of the third resistor R3, the second terminal of the third resistor R3 is connected to the first terminals of the first resistor R1 and the fourth resistor R4, the second terminal of the fourth resistor R4 is grounded, and the second terminal of the first resistor R1 is connected to the positive terminal Vref of the regulated power supply. Using a differential amplifier circuit improves the signal-to-noise ratio and sensitivity, enabling the detection of wider voltage signal fluctuations even with small temperature changes, thus capturing temperature changes more accurately and improving temperature acquisition accuracy. This allows for more precise temperature control.

[0044] Preferably, both the first resistor R1 and the second resistor R2 are adjustable resistors.

[0045] Based on the above, the preferred option is, for example... Figure 2 As shown, the first resistor R1 is the first load resistor of the first channel 1 of the digital potentiometer (e.g., AD5143), and the second resistor R2 is the second load resistor of the second channel 2 of the digital potentiometer. The digital potentiometer has a pin connected to the positive terminal Vref of the regulated power supply. The digital potentiometer can automatically adjust the resistance values ​​of the first and second load resistors according to the target temperature range input by the user. Therefore, compared to a control circuit composed of resistors with fixed resistance values, this application provides a wider temperature control range through the automatic adjustment function of the digital potentiometer.

[0046] based on Figure 2When the temperature of the thermistor changes, the resistance of the NTC will change non-linearly. The voltage drop value is output through the output terminal OUT2 of the voltage follower. This port is for low-sensitivity temperature acquisition. The change value of the NTC voltage drop value is also amplified through the differential amplifier circuit and output through the output terminal OUT1. This port is for high-sensitivity temperature acquisition. Thus, two temperature acquisition signals are output separately.

[0047] Based on the digital potentiometer, the resistance value and second precision of the second resistor are determined according to the target temperature of the temperature-sensitive element. The resistance value of the first resistor is determined based on the resistance values ​​of the second and fourth resistors.

[0048] Specifically, based on Figure 2 The circuit shown can detect a temperature change ΔT (i.e., the minimum temperature fluctuation that the control module can detect and process) when the ADC analog-to-digital conversion is at its minimum resolution as follows:

[0049]

[0050] Where, ΔV out1 The minimum resolution of the ADC analog-to-digital conversion represents the smallest unit that can be acquired during the acquisition process, and also the smallest temperature change that can be resolved; it is a fixed value. K is the amplification factor of the operational amplifier, T is the temperature of the temperature-sensitive element, R0 is the resistance of the thermistor at room temperature, B is the characteristic constant of the NTC (the characteristic constant of a 10K thermistor is 3455), and T0 is the reference normal temperature (usually 25℃).

[0051] In equation (1), the variables are ΔT, T, and R2, while the others are constants. ΔT and T have a non-linear relationship, and to obtain the optimal sensitivity at each temperature point, the resistance value of the second resistor R2 can be adjusted. The result can be obtained according to equation (1). Figure 3 The 3D diagram shown illustrates the relationship between the resistance value of the second resistor R2, the temperature of the temperature-sensitive element, and the accuracy of the high-sensitivity temperature acquisition module (shown in the diagram as high-sensitivity accuracy, i.e., the second accuracy).

[0052] As an example, for a specific temperature, the resistance values ​​of R1 and R2 are determined using the following method:

[0053] Figure 3 In the diagram, a concave curve showing the relationship between the resistance value of R2 and high sensitivity is formed on a cross-section perpendicular to the temperature coordinates. For each temperature point, this curve has a minimum point (i.e., the point with the highest sensitivity at that temperature). The R2 resistance value corresponding to this minimum point is the R2 resistance value paired with that temperature. The relationship between R2 and T is as follows:

[0054]

[0055] Therefore, after determining the target temperature of the temperature-sensitive element, this target temperature is input to the digital potentiometer via the PC. The digital potentiometer then automatically adjusts the resistance of the second load resistor to the corresponding R2 value, and simultaneously adjusts the second precision to the minimum precision. Thus, by changing the resistance of the second load resistor, the optimal sensitivity point for the target temperature is adjusted, improving the accuracy of temperature control.

[0056] Combination Figure 2 In a low-sensitivity temperature acquisition module, if the temperature of the temperature-sensitive element is fixed, then with R2 fixed, the voltage drop across the NTC is also fixed. Therefore, for each temperature, there is a one-to-one correspondence between R2 and the voltage drop across the NTC.

[0057] Based on this, combined Figure 2 For the second channel 2 of the digital potentiometer, the second terminal of R2 is connected to the positive terminal of the regulated power supply Vref, and the first terminal of the temperature sensor NTC is grounded. Thus, Vref, R2, and NTC form a loop. For the first channel 1 of the digital potentiometer, the second terminal of R1 is connected to the positive terminal of the regulated power supply Vref, and the second terminal of the fourth resistor R4 is grounded. Thus, Vref, R1, and R4 form a loop. When the temperature of the temperature-sensitive element is determined, the resistance value of R2 and the voltage drop across NTC are fixed. When the voltage drop across NTC is the same as the voltage drop across the fourth resistor R4, the output value of the differential amplifier circuit OUT1 is 0, achieving high-sensitivity temperature control for that temperature. Based on this, the resistance value of R1 that makes the voltage drop across NTC the same as the voltage drop across the fourth resistor R4 is taken as the resistance value of the first load resistor corresponding to that temperature. T, R1, and R2 satisfy the following relationship:

[0058]

[0059] Therefore, after determining the target temperature of the temperature-sensitive element, the target temperature is input into the digital potentiometer via the PC, and the digital potentiometer can automatically adjust the resistance value of the first load resistor to the corresponding R1 resistance value.

[0060] Therefore, by automatically adjusting the resistance values ​​of R1 and R2 to match the target temperature and the second precision using a digital potentiometer, high-precision temperature control can be ensured.

[0061] On the other hand, Figure 3In the figure, a curve showing the relationship between temperature and high sensitivity accuracy is formed on the cross section perpendicular to the R2 resistance value. It can be seen that different R2 resistance values ​​result in different temperature control ranges and accuracy. By changing the R2 resistance value, the temperature control range and accuracy can be changed. Users can select a suitable R2 resistance value according to their actual temperature control range and accuracy requirements. Furthermore, the first and second load resistors of the digital potentiometer have preset resistance ranges. According to equation (3), fixing R1 or R2 and changing R2 or R1 determines different control temperatures. Therefore, compared to control circuits composed of resistors with fixed resistance values, the overall temperature control range of this application is wider.

[0062] As an example, the first precision is set to a constant value, i.e., controlled within ±0.01℃.

[0063] Based on the above, in this application, if Figure 4 As shown, the control flow of the control module is as follows:

[0064] S410: Receives low-sensitivity temperature information output in real time by the acquisition module.

[0065] S420: Calculate the first difference between the low-sensitivity temperature information and the preset low-sensitivity target temperature, and determine whether the first difference is greater than the first set value. If yes, execute S430; otherwise, execute S440.

[0066] The first set value has a first precision, for example, controlled within ±0.01℃.

[0067] S430: Enters the low-sensitivity PID control program, then executes S440.

[0068] In the low-sensitivity PID control process, in each PID cycle, the control module transmits the acquired low-sensitivity control information to the temperature drive module. The temperature drive module then drives the temperature-sensitive element to adjust the temperature and feeds back the real-time temperature to the acquisition module. Subsequently, it obtains new low-sensitivity temperature information and enters the next PID cycle. This process continues until the first difference is less than or equal to the first set value, at which point the low-sensitivity PID control program ends.

[0069] S440: Preset time interval for timing, allowing low-sensitivity temperature control to enter a stable state.

[0070] S450: Receives high-sensitivity temperature information output in real time from the acquisition module.

[0071] S460: Calculate the second difference between the high-sensitivity temperature information and the preset high-sensitivity target temperature, and determine whether the second difference is greater than the second set value. If yes, proceed to S470; otherwise, return to S410.

[0072] The second set value has a second precision, for example, controlled within ±0.003℃.

[0073] S470: Enters the high-sensitivity PID control program, then returns to S410.

[0074] In the high-sensitivity PID control process, in each PID cycle, the control module transmits the acquired high-sensitivity control information to the temperature drive module. The temperature drive module then drives the temperature-sensitive element to adjust the temperature and feeds back the real-time temperature to the acquisition module, subsequently obtaining new high-sensitivity temperature information and entering the next PID cycle. This process continues until the second difference is less than or equal to the second set value, at which point the high-sensitivity PID control program terminates.

[0075] Among them, incremental PID is used. Incremental control reduces computational complexity and has the characteristic of fast response in real-time systems. Dual-loop PID control can reduce overshoot, thereby reducing control time.

[0076] Theoretically, based on the characteristics of nonlinear amplifier circuits and equation (1), we can obtain that... Figure 2 The circuit model shown has the highest sensitivity at 45°C.

[0077] Furthermore, the temperature of the temperature-sensitive element was tested within the range of 15-75℃ in an experimental environment of approximately 27℃ and with R2 of 3000Ω. Temperature was controlled using a dual-loop PID controller. After the system stabilized, 1200-second data points were measured, and the standard deviation of the corresponding temperature points within the 15-75℃ range was calculated. The results are as follows: Figure 5 As shown. Figure 5 Among the data collected, the highest accuracy was achieved at 45℃, a conclusion consistent with theoretical calculations, demonstrating that the control effect is optimal at 45℃. Figure 5 It can also be seen that the temperature fluctuation range is within 0.0062℃. Furthermore, the optimal temperature control point can be adjusted by regulating the second load resistor R2.

[0078] When dual-loop PID control is enabled using high sensitivity and low sensitivity, after the control system has been running for 5 minutes, the temperature of the temperature-sensitive element is acquired using an oscilloscope, and the temperature change over 8500 seconds is recorded. The single-loop and dual-loop PID control graphs are shown below. Figure 6 and 7 As shown. From Figure 6As can be seen, when the single-loop PID channel is activated, calculations are performed in the low-sensitivity acquisition channel. After the operation stabilizes, the temperature remains relatively stable at 34.987±0.01℃, but excessive oscillations are observed during the control process. When the dual-loop PID channel is activated, after 10000 seconds of data measurement, the temperature remains relatively stable at 34.987±0.003℃, demonstrating significantly improved stability. The results indicate that the use of a nonlinear amplifier circuit for control significantly improves control accuracy, showcasing the advantages of dual-loop PID control and ensuring the normal operation of the temperature-sensitive element.

[0079] This application combines two-channel temperature acquisition and a dual-loop incremental PID algorithm to achieve temperature control in the range of 15℃ to 75℃. The accuracy of single-loop low-sensitivity PID control is ±0.01℃, while the accuracy of dual-loop PID control is improved to ±0.003℃.

[0080] In summary, this application, through dual-channel temperature acquisition circuitry and dual-channel PID control, achieves a wide temperature adjustment range while ensuring more precise temperature control within a specific frequency band. This significantly improves the operating environment and performance of the temperature-sensitive element, ensuring stable and reliable operation in high-precision applications. Furthermore, this design possesses excellent portability, allowing application to other temperature control systems, and offers better scalability compared to commercially available microcontroller systems. This makes this system highly valuable in the field of industrial intelligence.

[0081] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A two-way temperature control system for a temperature sensitive element, characterized by, It includes a data acquisition module, a control module, and a temperature drive module; The acquisition module acquires the temperature of the temperature-sensitive element and outputs high-sensitivity temperature information and low-sensitivity temperature information. The control module controls the temperature drive module to perform low-sensitivity temperature adjustment based on real-time low-sensitivity temperature information. After the temperature of the temperature-sensitive element is controlled to the first precision of the target temperature, the control module controls the temperature drive module to perform high-sensitivity temperature adjustment based on real-time high-sensitivity temperature information, so that the temperature of the temperature-sensitive element is controlled to the second precision of the target temperature. The low-sensitivity temperature information is converted into a digital signal through ADC analog-to-digital conversion. Wherein, the first precision is lower than the second precision; the acquisition module includes an adjustable resistor; The acquisition module includes a temperature sensor, a high-sensitivity temperature acquisition module, and a low-sensitivity temperature acquisition module. The temperature sensor is used to collect the temperature of the temperature-sensitive element. The first end of the temperature sensor is grounded, and the second end of the temperature sensor serves as the input signal for the high-sensitivity temperature acquisition module and the low-sensitivity temperature acquisition module. The high-sensitivity temperature acquisition module is a differential amplifier circuit. In the differential amplifier circuit, the non-inverting input terminal of the operational amplifier is connected to the second terminal of the temperature sensor, the inverting input terminal of the operational amplifier is connected to the first terminal of the third resistor, the second terminal of the third resistor is connected to the first terminal of the first resistor and the first terminal of the fourth resistor, the second terminal of the fourth resistor is grounded, and the second terminal of the first resistor is connected to the positive terminal of the regulated power supply. The low-sensitivity temperature acquisition module is a voltage follower. The input terminal of the voltage follower is connected to the first terminal of the fifth resistor. The second terminal of the fifth resistor is connected to the second terminal of the temperature sensor and the first terminal of the second resistor. The second terminal of the second resistor is connected to the positive terminal of the regulated power supply. The first resistor and the second resistor are the adjustable resistors; The relationship between the detectable temperature change when the ADC analog-to-digital conversion is at its minimum resolution, the temperature of the temperature-sensitive element, and the resistance value of the second resistor is as follows: ； in, The minimum resolution of the ADC analog-to-digital conversion represents the smallest temperature change that can be resolved, and is a fixed value. This refers to the amplification factor of the operational amplifier in the high-sensitivity temperature acquisition module. The temperature of the temperature-sensitive element. The resistance value of the temperature-sensitive element at room temperature is [value missing]. These are the characteristic constants of the temperature sensor. For reference to normal temperature, This is the resistance value of the second resistor. The power supply voltage, The temperature change that can be detected when the ADC analog-to-digital conversion is at its minimum resolution; The temperature control range and accuracy of the temperature-sensitive element are changed by altering the resistance value of the second resistor. Wherein, the first resistor is the first load resistor of the first channel of the digital potentiometer, and the second resistor is the second load resistor of the second channel of the digital potentiometer.

2. The dual-path temperature control system of temperature-sensitive elements according to claim 1, characterized in that, The resistance value of the second resistor and the second accuracy are determined based on the target temperature of the temperature-sensitive element.

3. The dual-path temperature control system of temperature-sensitive elements according to claim 2, characterized in that, The resistance value of the first resistor is determined based on the resistance values ​​of the second resistor and the fourth resistor.

4. The dual-path temperature control system of temperature-sensitive components according to claim 1, wherein, The temperature sensor is a thermistor.

5. The dual-path temperature control system of temperature-sensitive components according to claim 1, wherein, The temperature drive module is a thermoelectric cooler.

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