Method, device, terminal and storage medium for measuring temperature of a bridge thermistor

Abstract

The application relates to the technical field of thermistors, in particular to a method and device for measuring the temperature of a bridge thermistor, a terminal and a storage medium, the method comprising the following steps: obtaining a measurement value as the voltage drop of the positive connection end of a voltage measurement module, obtaining a measurement value as the voltage drop of the negative connection end of the voltage measurement module, and calculating the bridge voltage based on the two measurement values; obtaining the resistance values of the first resistor, the second resistor and the third resistor respectively, and calculating the resistance value of the thermistor based on the resistance values of the first resistor, the second resistor and the third resistor; and determining the temperature T of the thermistor according to the temperature characteristics of the thermistor based on the resistance value of the thermistor. The application eliminates the measurement error caused by the resistance-capacitance element and the power supply to the measurement result, and improves the measurement accuracy.

Description

Technical Field

[0001] This application relates to the technical field of thermistors, and in particular to a method, apparatus, terminal, and storage medium for measuring the temperature of a bridge thermistor. Background Technology

[0002] In existing temperature measurement technologies, thermistors are typically used as temperature-sensitive elements to obtain temperature information. For example, Chinese Patent CN204855014U discloses a resistance thermometer that uses a thermistor as a temperature-sensing probe and measures temperature accurately based on the bridge principle. Specifically, see paragraphs 0017-0035 of its specification, which disclose the working principle of the resistance thermometer and a method for measuring the temperature of a bridge thermistor.

[0003] Regarding the aforementioned related technologies, the inventors believe that the following technical defects exist: the measurement results obtained by calculation based on the methods in the existing related technologies are unstable and have large errors, which require further improvement. Summary of the Invention

[0004] To improve the stability of measurement results and reduce the errors in the measurement results to a certain extent, this application provides a method, apparatus, terminal, and storage medium for measuring the temperature of a bridge thermistor.

[0005] Firstly, this application provides a method for measuring the temperature of a bridge thermistor, which employs the following technical solution:

[0006] A method for measuring the temperature of a bridge thermistor, applied to a Huygens bridge comprising a first resistor, a second resistor, a third resistor, a thermistor, and a voltage measurement module, wherein the first resistor and the second resistor form a first bridge branch, the third resistor and the thermistor form a second bridge branch, the positive terminal of the voltage measurement module is connected between the first resistor and the second resistor, and the negative terminal of the voltage measurement module is connected between the third resistor and the thermistor. The method includes: acquiring a measured value. as well as :

[0007] in, The voltage drop across the positive terminal of the voltage measurement module. The voltage drop at the negative terminal of the voltage measurement module, and based on... as well as Calculate bridge voltage ; Obtain the resistance values ​​of the first resistor, the second resistor, and the third resistor respectively. , as well as ,based on , , , as well as Calculate the resistance value of the thermistor. ;

[0008] Based on the resistance value of the thermistor The temperature T of the thermistor is determined based on its temperature characteristics.

[0009] Since the power supply and resistive / capacitive components have certain errors, and the measurement accuracy of the Huygens bridge is greatly affected by the errors of the power supply and resistive / capacitive components, by adopting the above technical solution, the measurement error caused by the resistive / capacitive components and power supply is eliminated, the measurement accuracy is improved, and it is not necessary to use a high-precision but also expensive power supply and resistive / capacitive components, which helps to reduce costs.

[0010] Optionally, the basis as well as Calculate bridge voltage The specific steps are as follows:

[0011] Bridge pressure is calculated based on the following formula. :

[0012] .

[0013] By adopting the above technical solution, the bridge pressure is calculated according to the above formula. To calculate the resistance value of the thermistor. .

[0014] Optionally, the basis is based on , , , as well as Calculate the resistance value of the thermistor. The specific steps are as follows:

[0015] The resistance of the thermistor is calculated based on the following formula. :

[0016] .

[0017] By adopting the above technical solution, the resistance value of the thermistor can be obtained based on the above formula. It is only related to the resistance value of the fixed resistor and the measured value, eliminating the measurement error caused by the RC components and power supply, improving the measurement accuracy, and eliminating the need for the use of high-precision but also high-cost power supply and RC components, which helps to reduce costs.

[0018] Optionally, the resistance value based on the thermistor The specific steps for determining the temperature T of the thermistor based on its temperature characteristics are as follows:

[0019] Obtain the resistance value of the thermistor. The rate of change A with temperature and the resistance of the thermistor Based on the temperature value C when it is zero, the temperature characteristic expression of the thermistor is constructed as follows:

[0020] ,

[0021] Based on the above formula and the resistance value of the thermistor The resistance value of the thermistor The rate of change A with temperature and the resistance of the thermistor The temperature C at which the temperature is zero is used to calculate T.

[0022] Secondly, the device for measuring the temperature of a bridge thermistor provided in this application adopts the following technical solution:

[0023] A device for measuring the temperature of a bridge thermistor is applied to a Huygens bridge comprising a first resistor, a second resistor, a third resistor, a thermistor, and a voltage measurement module. The first resistor and the second resistor form a first bridge branch, the third resistor and the thermistor form a second bridge branch, the positive terminal of the voltage measurement module is connected between the first resistor and the second resistor, and the negative terminal of the voltage measurement module is connected between the third resistor and the thermistor. The device includes:

[0024] The second acquisition module is used to acquire the resistance values ​​of the first resistor, the second resistor, and the third resistor, respectively. , as well as ,based on , , , as well as Calculate the resistance value of the thermistor. :

[0025] and a temperature acquisition module, the temperature acquisition module being used to acquire the temperature based on the resistance value of the thermistor. The temperature T of the thermistor is determined based on its temperature characteristics.

[0026] Since the power supply and resistive / capacitive components have certain errors, and the measurement accuracy of the Huygens bridge is greatly affected by the errors of the power supply and resistive / capacitive components, by adopting the above technical solution, the measurement error caused by the resistive / capacitive components and power supply is eliminated, the measurement accuracy is improved, and it is not necessary to use a high-precision but also expensive power supply and resistive / capacitive components, which helps to reduce costs.

[0027] Optionally, the first acquisition module includes a first calculation unit, which is used to calculate the bridge voltage based on the following formula. :

[0028] .

[0029] By adopting the above technical solution, the bridge pressure is calculated according to the above formula. To calculate the resistance value of the thermistor. .

[0030] Optionally, the second acquisition module includes a second calculation unit, which is used to calculate the resistance value of the thermistor based on the following formula. :

[0031] .

[0032] By adopting the above technical solution, the resistance value of the thermistor can be obtained based on the above formula. Only with the resistance value of the fixed resistor Furthermore, it eliminates measurement errors caused by resistors, capacitors, and power supplies, thus improving measurement accuracy. It also eliminates the need for high-precision but expensive power supplies and resistors, which helps reduce costs.

[0033] Optionally, the temperature acquisition module includes a third calculation unit, which is used to acquire the resistance value of the thermistor. The rate of change A with temperature and the resistance of the thermistor Based on the temperature value C when it is zero, the temperature characteristic expression of the thermistor is constructed as follows:

[0034] ,

[0035] And based on the above formula and the resistance value of the thermistor The resistance value of the thermistor The rate of change A with temperature and the resistance of the thermistor The temperature C at which the temperature is zero is used to calculate T.

[0036] Thirdly, this application also provides a terminal including a processor and a memory, wherein the memory is used to store a program and the processor is used to run the program to implement the method described above.

[0037] Fourthly, this application also provides a storage medium on which a computer program is stored, which, when run on a computer, implements the method described above.

[0038] As can be seen from the above, the beneficial technical effects of this application include: by adopting the technical solution of this application, the measurement error caused by the resistive and capacitive components and the power supply to the measurement results is eliminated, the measurement accuracy is improved, and it is not necessary to use a power supply with high accuracy but also high cost and resistive and capacitive components, which helps to reduce costs.

[0039] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0040] Figure 1 This is a circuit diagram of the Huygens bridge used in the embodiments of this application.

[0041] Figure 2 This is a circuit diagram of the simulation model of the Huygens bridge used in the embodiments of this application.

[0042] Figure 3 This is the page for setting the Monte Carlo tolerance table when performing simulations using existing technologies.

[0043] Figure 4 This is the page for setting the Monte Carlo target expression when performing simulations using existing technologies.

[0044] Figure 5 This is a Monte Carlo result distribution chart obtained when using existing technology for simulation.

[0045] Figure 6 This is a Monte Carlo statistical result graph obtained from simulation using existing technology.

[0046] Figure 7 This is the page for setting the Monte Carlo tolerance table when performing simulation using the technical solution claimed in this application.

[0047] Figure 8 This is the page for setting the Monte Carlo target expression when performing simulation using the technical solution claimed in this application.

[0048] Figure 9It is a Monte Carlo result distribution map obtained when simulating the technical solution claimed in this application.

[0049] Figure 10 The image shows the Monte Carlo statistical results obtained during simulation using the technical solution claimed in this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] In a first aspect, embodiments of this application disclose a method for measuring the temperature of a bridge thermistor, such as... Figure 1 The diagram shown is a circuit diagram of the Huygens bridge used in an embodiment of this application. The Huygens bridge includes a first resistor R1, a second resistor R2, a third resistor R3, and a thermistor. And a voltage measurement module, wherein the first resistor R1 and the second resistor R2 form the first bridge branch, and the third resistor R3 and the thermistor This forms the second bridge branch. The positive terminal V+ of the voltage measurement module is connected between the first resistor R1 and the second resistor R2, and the negative terminal V- of the voltage measurement module is connected between the third resistor R3 and the thermistor. between.

[0053] Specifically, the method for measuring the temperature of a bridge thermistor disclosed in this application includes the following steps:

[0054] S100, Obtain measurement value The voltage drop across the positive terminal of the voltage measurement module. For the negative terminal of the voltage measurement module The voltage drop, and based on as well as Calculate bridge voltage .

[0055] S200, Obtain the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 respectively. , as well as Thermistor is calculated based on the following formula. resistance value :

[0056] (5-2).

[0057] S300, based on thermistor resistance value According to thermistor Temperature characteristics determine the thermistor The temperature T.

[0058] Among them, a multimeter can be used to measure separately. as well as Then, the bridge voltage is calculated based on the following formula. :

[0059]

[0060] Among them, the first resistor R1, the second resistor R2, and the third resistor R3 are all based on thermistors. The appropriate fixed resistor value is obtained by selecting a resistor with a suitable resistance value within the temperature measurement range. , , , as well as Substituting into equation (5-2) yields the thermistor. Real-time resistance value .

[0061] Among them, thermistor The temperature characteristic expression is as follows:

[0062]

[0063] In the formula, A is the thermistor. resistance value The rate of change with temperature, where C is the thermistor. resistance value The temperature is zero, where T is the current temperature to be measured. Different models of thermistors... Both A and C are constants; in other words, the thermistor is determined. After specifying the model number, the thermistor... Real-time resistance value Substituting into equation (1-1) will give you the current temperature T to be measured.

[0064] Furthermore, the derivation of equation (5-2) is as follows:

[0065] S1. Based on Kirchhoff's voltage law, list the voltage expressions for the first and second bridge branches respectively:

[0066]

[0067]

[0068] Where U is the power supply voltage. The voltage across the first resistor R1, The voltage across the second resistor R2 is... The voltage across the third resistor R3 is... Thermistor voltage, For the power supply ripple of the corresponding branch, For parasitic inductance, This is the voltage drop across the parasitic inductance caused by the power supply ripple of the corresponding branch.

[0069] S2. List the results according to the voltage measurement method. , The relationship between the measured resistance and the following formula:

[0070]

[0071]

[0072] in, The voltage drop across the positive terminal of the voltage measurement module. This is the voltage drop across the negative terminal V- of the voltage measurement module.

[0073] S3. Combining equations (2-1), (2-2), (2-3), (2-4), and (3-1), we obtain:

[0074] This formula is the existing method for calculating thermistors. resistance value

[0075] S4, Ignore power supply ripple Based on Ohm's law, we can perform an equivalent transformation on equation (2-3) to obtain:

[0076]

[0077] Among them, the right side of the above equation is... It is named the statistical error factor.

[0078] S5, Statistical error factor Equation (5-2) can be obtained by combining equations (4-1) and (5-1).

[0079] It can be seen that in equation (5-2) Compared with equation (4-1), the influence of power supply voltage on the measured thermistor is eliminated. resistance The influence of this helps to ensure the accuracy of the measurement results.

[0080] Specifically, the following example further illustrates the technical solution of this application: Assume that in the embodiments of this application... = =1.2kΩ, =390Ω, and the thermistor used in this application For the PT100 series, A = 0.4, C = -250. Substituting these values ​​into equation (1-1) gives...

[0081]

[0082] It is understandable that, within a certain time period, the power supply voltage is a constant, that is... It is a constant, specifically, Given the power supply voltage at that moment, substituting it into equation (4-1) and combining it with equation (1-2) gives us...

[0083]

[0084] Similarly, the simultaneous equations (1-2) and (5-2) have

[0085]

[0086] In this context, equation (4-2) is the expression for obtaining the current temperature using existing technology, and equation (5-3) is the expression for obtaining the current temperature using the method claimed in this application. In practical applications, it is only necessary to use the measured value... and Substituting into equation (4-2) or equation (5-3) will yield the current temperature value T.

[0087] The following section uses a simulation model and Monte Carlo simulation analysis to illustrate the advantages of the method claimed in this application compared to methods in the prior art: smaller measurement error and more stable measurement results.

[0088] Specifically, such as Figure 2 The diagram shown is a circuit diagram of a simulation model of the Huygens bridge used in an embodiment of this application, which is related to... Figure 1 The difference in the Huygens bridge circuit shown is that... Figure 1 Thermistor in Replace it with a fixed resistor, namely the fourth resistor R4, and the resistance value of the fourth resistor R4 is... =110Ω, where 110Ω is the resistance of a PT100 thermistor at 25℃ under ideal conditions.

[0089] First, verify the measurement results obtained using existing technical methods:

[0090] First, such as Figure 3 As shown, set the Monte Carlo simulation tolerance table.

[0091] Then, as Figure 4 As shown, a Monte Carlo statistical objective expression is created based on equation (4-2), and 500 Monte Carlo simulations are set.

[0092] like Figure 5 As shown, the Monte Carlo distribution obtained using existing methods shows a Monte Carlo mean of 25.4614, close to the simulation design value of 25, indicating that the result roughly follows a normal distribution. Furthermore, as... Figure 6 As shown, the Monte Carlo statistical results obtained using existing methods have a standard deviation of 10.3292, indicating that most of the results fall within the range of 25℃±30℃. This shows that the measurement results are highly volatile and unstable, and have a large error.

[0093] Second, verify the measurement results obtained using the method claimed in this application:

[0094] First, such as Figure 7 As shown, set the Monte Carlo simulation tolerance table.

[0095] Then, as Figure 8 As shown, a Monte Carlo statistical objective expression is created based on equation (5-3), and 500 Monte Carlo simulations are set.

[0096] like Figure 9 As shown, the Monte Carlo distribution obtained using the method claimed in this application shows that the Monte Carlo mean is 25.0801, close to the simulation design value of 25, and the result roughly follows a normal distribution. Furthermore, as... Figure 10 As shown, the Monte Carlo statistical results obtained using the method claimed in this application have a standard deviation of 1.37082, indicating that the vast majority of the results fall within the range of 25℃±3.9℃. It can be seen that compared with the results obtained using the methods in the prior art, the measurement results fluctuate very little and the error is small, and the overall performance is significantly improved.

[0097] Secondly, embodiments of this application disclose a device for measuring the temperature of a bridge thermistor, such as... Figure 1The diagram shown is a circuit diagram of the Huygens bridge used in an embodiment of this application. The Huygens bridge includes a first resistor R1, a second resistor R2, a third resistor R3, and a thermistor. And a voltage measurement module, wherein the first resistor R1 and the second resistor R2 form the first bridge branch, and the third resistor R3 and the thermistor The positive terminal of the voltage measurement module forms the second bridge branch. Connect the negative terminal of the voltage measurement module between the first resistor R1 and the second resistor R2. Connect the third resistor R3 and the thermistor between.

[0098] Specifically, the temperature measurement device for a bridge thermistor disclosed in this application includes a first acquisition module, a second acquisition module, and a temperature acquisition module connected to each other, wherein: the first acquisition module is used to acquire measured values. The voltage drop across the negative terminal V- of the voltage measurement module, and based on...

[0099] The second acquisition module is used to acquire the resistance values ​​of the first resistor, the second resistor, and the third resistor, respectively. ,based on , as well as Calculate thermistor resistance value .

[0100] The temperature acquisition module is used for thermistor-based applications. resistance value According to thermistor Temperature characteristics determine the thermistor The temperature T.

[0101] The first acquisition module includes a first calculation unit, which is used to calculate based on the following formula (3-1). :

[0102]

[0103] Specifically, a multimeter can be used to measure the results. Calculation of bridge voltage .

[0104] The second acquisition module further includes a second calculation unit, which is used to calculate the thermistor based on the following formula (5-2). resistance value :

[0105] (5-2)

[0106] Among them, the first resistor R1, the second resistor R2, and the third resistor R3 are all based on thermistors. The appropriate fixed resistor value is obtained by selecting a resistor with a suitable resistance value within the temperature measurement range. , Substituting into equation (5-2) yields the thermistor. Real-time resistance value .

[0107] Furthermore, the temperature acquisition module also includes a third calculation unit, which is used to acquire the temperature of the thermistor. resistance value The rate of change A with temperature and the thermistor resistance value Construct a thermistor with a temperature value C of zero. The temperature characteristic expression of the thermistor is obtained. The temperature characteristic expression is as follows:

[0108]

[0109] Based on the above formula and the thermistor resistance value Thermistor resistance value The rate of change of temperature A and the thermistor resistance value The temperature C at which the temperature is zero is used to calculate T.

[0110] Specifically, different models of thermistors Both A and C are constants; in other words, the thermistor is determined. After specifying the model number, the thermistor... Real-time resistance value Substituting into equation (1-1) will give you the current temperature T to be measured.

[0111] Furthermore, the derivation of equation (5-2) is as follows:

[0112] S1. Based on Kirchhoff's voltage law, list the voltage expressions for the first and second bridge branches respectively:

[0113]

[0114]

[0115] Where U is the power supply voltage. The voltage across the first resistor R1, The voltage across the second resistor R2 is... The voltage across the third resistor R3 is... Thermistor voltage, For the power supply ripple of the corresponding branch, For parasitic inductance, This is the voltage drop across the parasitic inductance caused by the power supply ripple of the corresponding branch.

[0116] S2. List the results according to the voltage measurement method. The relationship between the measured resistance and the following formula:

[0117]

[0118]

[0119] in, For the negative terminal of the voltage measurement module Pressure drop.

[0120] S3. Combining equations (2-1), (2-2), (2-3), (2-4), and (3-1), we obtain:

[0121] This formula is the existing method for calculating thermistors. resistance value

[0122] S4, Ignore power supply ripple Based on Ohm's law, we can perform an equivalent transformation on equation (2-3) to obtain:

[0123]

[0124] Among them, the right side of the above equation is... It is named the statistical error factor.

[0125] S5, Statistical error factor Equation (5-2) can be obtained by combining equations (4-1) and (5-1).

[0126] It can be seen that in equation (5-2) Compared with equation (4-1), the influence of power supply voltage on the measured thermistor is eliminated. resistance value The influence of this helps to ensure the accuracy of the measurement results.

[0127] Specifically, the following example further illustrates the technical solution of this application: Assume that in the embodiments of this application... = =1.2kΩ, =390Ω, and the thermistor used in this application For the PT100 series, A = 0.4, C = -250. Substituting these values ​​into equation (1-1) gives...

[0128]

[0129] It is understandable that, within a certain time period, the power supply voltage is a constant, that is... It is a constant, specifically, Given the power supply voltage at that moment, substituting it into equation (4-1) and combining it with equation (1-2) gives us...

[0130]

[0131] Similarly, the simultaneous equations (1-2) and (5-2) have

[0132]

[0133] In this context, equation (4-2) is the expression for obtaining the current temperature using existing technology, and equation (5-3) is the expression for obtaining the current temperature using the method claimed in this application. In practical applications, it is only necessary to use the measured value... and Substituting into equation (4-2) or equation (5-3) will yield the current temperature value T.

[0134] The following section uses a simulation model and Monte Carlo simulation analysis to illustrate the advantages of the method claimed in this application compared to methods in the prior art: smaller measurement error and more stable measurement results.

[0135] Specifically, such as Figure 2 The diagram shown is a circuit diagram of a simulation model of the Huygens bridge used in an embodiment of this application, which is related to... Figure 1 The difference in the Huygens bridge circuit shown is that... Figure 1 Thermistor in Replace it with a fixed resistor, namely the fourth resistor R4, and the resistance value of the fourth resistor R4 is... =110Ω, where 110Ω is the resistance of a PT100 thermistor at 25℃ under ideal conditions.

[0136] First, verify the measurement results obtained using existing technical methods:

[0137] First, such as Figure 3 As shown, set the Monte Carlo simulation tolerance table.

[0138] Then, as Figure 4 As shown, a Monte Carlo statistical objective expression is created based on equation (4-2), and 500 Monte Carlo simulations are set.

[0139] like Figure 5As shown, the Monte Carlo distribution obtained using existing methods shows a Monte Carlo mean of 25.4614, close to the simulation design value of 25, indicating that the result roughly follows a normal distribution. Furthermore, as... Figure 6 As shown, the Monte Carlo statistical results obtained using existing methods have a standard deviation of 10.3292, indicating that most of the results fall within the range of 25℃±30℃. This shows that the measurement results are highly volatile and unstable, and have a large error.

[0140] Second, verify the measurement results obtained using the method claimed in this application:

[0141] First, such as Figure 7 As shown, set the Monte Carlo simulation tolerance table.

[0142] Then, as Figure 8 As shown, a Monte Carlo statistical objective expression is created based on equation (5-3), and 500 Monte Carlo simulations are set.

[0143] like Figure 9 As shown, the Monte Carlo distribution obtained using the method claimed in this application shows that the Monte Carlo mean is 25.0801, close to the simulation design value of 25, and the result roughly follows a normal distribution. Furthermore, as... Figure 10 As shown, the Monte Carlo statistical results obtained using the method claimed in this application have a standard deviation of 1.37082, indicating that the vast majority of the results fall within the range of 25℃±3.9℃. It can be seen that compared with the results obtained using the methods in the prior art, the measurement results fluctuate very little and the error is small, and the overall performance is significantly improved.

[0144] Thirdly, embodiments of this application also disclose a terminal, including a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it executes the method in any optional implementation of the above embodiments.

[0145] Fourthly, embodiments of this application also disclose a storage medium storing a computer program. When the computer program is executed, it performs the method in any optional implementation of the above embodiments. The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0146] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0147] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0148] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0149] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0150] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for measuring the temperature of a bridge thermistor, applied to a Huygens bridge comprising a first resistor, a second resistor, a third resistor, a thermistor, and a voltage measurement module, wherein, The first resistor and the second resistor form a first bridge branch, the third resistor and the thermistor form a second bridge branch, the positive terminal of the voltage measurement module is connected between the first resistor and the second resistor, and the negative terminal of the voltage measurement module is connected between the third resistor and the thermistor. The method comprises: Obtain measurement values as well as : in, The voltage drop across the positive terminal of the voltage measurement module. The voltage drop at the negative terminal of the voltage measurement module, and based on... as well as Calculate bridge voltage ; Obtain the resistance values ​​of the first resistor, the second resistor, and the third resistor respectively. as well as ,based on as well as Calculate the resistance value of the thermistor. ; Based on the resistance value of the thermistor The temperature T of the thermistor is determined based on its temperature characteristics; the temperature T of the thermistor is determined based on its temperature characteristics. as well as Calculate the resistance value of the thermistor. The specific steps are as follows: The resistance of the thermistor is calculated based on the following formula. : ; The resistance value based on the thermistor The specific steps for determining the temperature T of the thermistor based on its temperature characteristics are as follows: Obtain the resistance value of the thermistor. The rate of change A with temperature and the resistance of the thermistor Based on the temperature value C when it is zero, the temperature characteristic expression of the thermistor is constructed as follows: ， Based on the above formula and the resistance value of the thermistor The resistance value of the thermistor The rate of change A with temperature and the resistance of the thermistor The temperature C when it is zero is used to calculate T.

2. The method for measuring the temperature of a bridge thermistor according to claim 1, characterized in that, The basis as well as Calculate bridge voltage The specific steps are as follows: Bridge pressure is calculated based on the following formula. : 。 3. A device for measuring the temperature of a bridge thermistor, applied to a Huygens bridge comprising a first resistor, a second resistor, a third resistor, a thermistor, and a voltage measurement module, wherein, The first resistor and the second resistor form a first bridge branch, the third resistor and the thermistor form a second bridge branch, the positive terminal of the voltage measurement module is connected between the first resistor and the second resistor, and the negative terminal of the voltage measurement module is connected between the third resistor and the thermistor. The device comprises: The first acquisition module is used to acquire measurement values. as well as , The voltage drop across the positive terminal of the voltage measurement module. The voltage drop at the negative terminal of the voltage measurement module, and based on... as well as Calculate bridge voltage ; The second acquisition module is used to acquire the resistance values ​​of the first resistor, the second resistor, and the third resistor, respectively. as well as ,based on as well as Calculate the resistance value of the thermistor. : and a temperature acquisition module, the temperature acquisition module being used to acquire the temperature based on the resistance value of the thermistor. The temperature T of the thermistor is determined based on its temperature characteristics; the second acquisition module includes a second calculation unit, which is used to calculate the resistance value of the thermistor based on the following formula. : ； The temperature acquisition module includes a third calculation unit, which is used to acquire the resistance value of the thermistor. The rate of change A with temperature and the resistance of the thermistor Based on the temperature value C when it is zero, the temperature characteristic expression of the thermistor is constructed as follows: ， And based on the above formula and the resistance value of the thermistor The resistance value of the thermistor The rate of change A with temperature and the resistance of the thermistor The temperature C when it is zero is used to calculate T.

4. The device for measuring the temperature of a bridge thermistor according to claim 3, characterized in that, The first acquisition module includes a first calculation unit, which is used to calculate the bridge voltage based on the following formula. : 。 5. A terminal, characterized in that, It includes a processor and a memory, the memory being used to store a program, and the processor being used to run the program to implement the method as described in any one of claims 1 to 2.

6. A storage medium having a computer program stored thereon, characterized in that, When the computer program is run on a computer, it implements the method as described in any one of claims 1 to 2.

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