CN113686457B - Temperature compensation device and method, electronic equipment and temperature detection device - Google Patents
Temperature compensation device and method, electronic equipment and temperature detection device Download PDFInfo
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- CN113686457B CN113686457B CN202111033923.3A CN202111033923A CN113686457B CN 113686457 B CN113686457 B CN 113686457B CN 202111033923 A CN202111033923 A CN 202111033923A CN 113686457 B CN113686457 B CN 113686457B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/10—Arrangements for compensating for auxiliary variables, e.g. length of lead
- G01K7/12—Arrangements with respect to the cold junction, e.g. preventing influence of temperature of surrounding air
- G01K7/13—Circuits for cold-junction compensation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
Abstract
The application relates to a temperature compensation device, a temperature compensation method, electronic equipment and a temperature detection device, and belongs to the technical field of temperature detection. Wherein, a temperature compensation device is applied to temperature sensor, and temperature compensation device includes: the temperature compensation module and the control module; the control module is used for determining the compensation voltage output by the control module according to the temperature representation value of the temperature measurement environment detected by the temperature sensor; and the temperature compensation module is used for carrying out temperature compensation on the cold end of the temperature sensor according to the compensation voltage. Based on the temperature representation value detected by the temperature measuring end of the temperature sensor, the control module outputs compensation voltage to perform temperature compensation on the cold end of the temperature sensor, so that the temperature of the cold end and the temperature of the temperature measuring end reach thermal balance, the heat transfer error of the temperature sensor is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot accurately measure the temperature are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
Description
Technical Field
The present disclosure relates to temperature detection technologies, and particularly to a temperature compensation device, a temperature compensation method, an electronic device, and a temperature detection device.
Background
The thermocouple system contact type temperature measuring instrument reflects the real temperature of a measured object by the fact that the working end of a sensor and the measured object reach thermal balance and have the same temperature. In actual test, because the temperature of the measured substance is different from the ambient temperature, heat can generate heat flow in the sensor due to temperature difference, so that the heat balance of the working end and the cold end of the sensor cannot be achieved, the caused temperature measurement error always exists, and the error is called as heat transfer error. The heat transfer error belongs to a system error, and certain measures should be taken to reduce the system error as much as possible.
At present, the common solution is to wrap the sensor by using a heat insulation material, so that the heat exchange between the sensor and the environment is reduced, but the sensor is difficult to replace after the heat insulation material is additionally arranged, the selection of the heat insulation material is also a problem, a simpler mode is needed to reduce the heat transfer error, and the temperature is accurately measured.
Disclosure of Invention
In order to solve the technical problem that the temperature sensor has obvious heat transfer errors and cannot accurately measure the temperature, the application provides a temperature compensation device, a temperature compensation method, electronic equipment and a temperature detection device.
In a first aspect, the present application provides a temperature compensation device for use with a temperature sensor, the temperature compensation device comprising: the temperature compensation module and the control module;
the control module is used for determining the compensation voltage output by the control module according to the temperature representation value of the temperature measurement environment detected by the temperature sensor;
the temperature compensation module is used for performing temperature compensation on the cold end of the temperature sensor according to the compensation voltage;
further, the temperature compensation device further includes: a power supply module; the power supply module is electrically connected with the control module and used for supplying power to the temperature compensation module through the control module;
further, the temperature compensation module is sleeved on the protective sleeve of the temperature sensor and is close to the cold end of the temperature sensor;
the first input end of the control module is electrically connected with the signal detection end of the temperature sensor, and the signal detection end is used for detecting the temperature representation value of the temperature measurement environment; the second input end of the control module is electrically connected with the power supply module; the output end of the control module is electrically connected with the temperature compensation module;
further, the temperature compensation module is abutted with a cold end of the temperature sensor;
further, the temperature compensation module comprises a heating wire;
the heating wire is electrically connected with the output end of the control module, generates heat under the action of the compensation voltage and performs temperature compensation on the cold end of the temperature sensor;
further, the control module comprises an acquisition unit and a processing unit;
the acquisition unit is used for acquiring a temperature representation value of a temperature measurement environment detected by the temperature sensor;
the processing unit is used for determining a first temperature value of the temperature measuring environment according to the temperature characterization value and determining the compensation voltage output by the control module according to the first temperature value;
further, the acquisition unit is also used for acquiring a second temperature value of the external environment where the cold end is located;
the processing unit obtains a temperature difference according to the first temperature value and the second temperature value, and determines a compensation voltage output by the control module according to the temperature difference and a preset mapping relation; the mapping relation is a mapping relation between the temperature difference and the compensation voltage.
In a second aspect, the present application provides a temperature compensation method applied to the temperature compensation device of any one of the first aspect, the method including:
acquiring a temperature representation value of a temperature measurement environment detected by a temperature sensor;
determining the compensation voltage output by the control module according to the temperature characterization value; the compensation voltage is used for carrying out temperature compensation on the cold end of the temperature sensor.
In a third aspect, an electronic device is provided, which includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the steps of the temperature compensation method in the embodiment of the second aspect when executing the program stored in the memory.
In a fourth aspect, a temperature detection device is provided, which includes a temperature sensor and the temperature compensation device of any embodiment of the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the temperature compensation device provided by the embodiment of the application comprises: the temperature compensation module and the control module; the control module is used for determining the compensation voltage output by the control module according to the temperature representation value of the temperature measurement environment detected by the temperature sensor; and the temperature compensation module is used for performing temperature compensation on the cold end of the temperature sensor according to the compensation voltage. Based on the temperature representation value detected by the temperature measuring end of the temperature sensor, the control module outputs compensation voltage to perform temperature compensation on the cold end of the temperature sensor, so that the temperature of the cold end and the temperature of the temperature measuring end reach thermal balance, the heat transfer error of the temperature sensor is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot accurately measure the temperature are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a temperature compensation device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another temperature compensation device provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another temperature compensation device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another temperature compensation device provided in the embodiment of the present application;
fig. 5 is a schematic flowchart of a temperature compensation method according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a temperature detection device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
The reference numbers are as follows:
100-a temperature sensor; 101-a temperature compensation module; 102-a control module; 103-a power supply module; 401-an acquisition unit; 402-processing unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The first embodiment of the present application provides a temperature compensation device, which is applied to a temperature sensor 100, as shown in fig. 1, and the temperature compensation device includes: a temperature compensation module 101 and a control module 102;
the control module 102 is configured to determine a compensation voltage output by the control module 102 according to a temperature representation value of the temperature measurement environment detected by the temperature sensor 100;
the temperature compensation module 101 is configured to perform temperature compensation on the cold end of the temperature sensor 100 according to the compensation voltage.
Based on the temperature representation value detected by the temperature measurement end of the temperature sensor, the control module 102 outputs the compensation voltage to perform temperature compensation on the cold end of the temperature sensor 100, so that the temperature at the cold end and the temperature at the temperature measurement end reach thermal balance, the heat transfer error of the temperature sensor is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot accurately measure the temperature are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
In one embodiment, the temperature compensation device further comprises: the power supply module 103, as shown in fig. 2, is electrically connected to the control module 102, and is used for supplying power to the temperature compensation module 101 through the control module 102.
Because the control module 102 generally has a smaller power and does not need a large power supply, in order to provide a sufficient compensation voltage for the temperature compensation module 101 and avoid that the output compensation voltage influences the operation of the control module 102 when being too large, the present embodiment further includes a power supply module 103, and the power supply module 103 supplies power to the temperature compensation module 101 under the control of the control module 102 to provide the compensation voltage. The power supply of the control module 102 only provides the power supply needed by the control module 102 during working, so that the risk of failure during high-power output is reduced. Moreover, the adaptive dc power supply module or ac power supply module can be selected according to different power supplies required by the temperature compensation module 101.
In one embodiment, as shown in fig. 3, the temperature compensation module 101 is sleeved on the protective sleeve of the temperature sensor 100 and is close to the cold end of the temperature sensor 100, a first input end of the control module 102 is electrically connected to a signal detection end of the temperature sensor 100, the signal detection end is used for detecting a temperature characteristic value of a temperature measurement environment, a second input end of the control module 102 is electrically connected to the power supply module 103, and an output end of the control module 102 is electrically connected to the temperature compensation module 101.
In order to improve the heating effect of the temperature compensation module 101, the temperature compensation module 101 is sleeved on the protective sleeve of the temperature sensor 100, so that the temperature compensation module 101 and the protective sleeve form good contact, and the temperature conduction rate is improved. It should be noted that the protective sleeve described herein may be a protective sleeve carried by the temperature sensor, may be a protective sleeve additionally installed, or may be a protective layer equivalent to the protective sleeve in the temperature sensor. When the sensor is additionally provided with a protective sleeve, in order to ensure the conduction rate of temperature, a material which is easy to transmit temperature can be filled in a gap between the protective sleeve and the sensor.
The first input end of control module 102 is connected with the signal detection end of temperature sensor 100, the temperature representation value of the temperature measurement environment detected by the signal detection end is collected (the cold end is provided with a temperature sensor connected to the signal output port of the detection end, the first input end of control module is directly connected with the signal output port of the cold end), control module 102 calculates the temperature value of the temperature measurement environment according to the temperature representation value of the temperature measurement environment, then calculates the compensation voltage required by temperature compensation module 101 according to the temperature value of the temperature measurement environment, and outputs the compensation voltage provided by power supply module 103 from the second input end through the output end of control module 102.
In one embodiment, the temperature compensation module 101 abuts the cold end of the temperature sensor 100.
Taking a temperature sensor as an example of a thermocouple, the thermocouple reflects the real temperature of a measured object by enabling the working end of the sensor and the measured object to achieve thermal equilibrium and enabling the working end of the sensor and the measured object to have the same temperature. In the thermocouple use, because the temperature of temperature measurement environment is different with the temperature of external environment, the heat can produce the heat flow in the sensor because of the difference in temperature for sensor work end thermal balance can't reach. After the temperature compensation module 101 is used to perform temperature compensation on the cold end of the temperature sensor 100, the temperature difference between the temperature of the temperature measurement environment and the temperature of the external environment is significantly reduced, so that the working end of the sensor (i.e., the temperature measurement end of the temperature sensor, or the signal detection end, or the hot end) reaches thermal balance. In order to increase the speed of reaching thermal equilibrium, the efficiency is highest when the temperature compensation module 101 is abutted against the cold end of the temperature sensor 100, and the speed of reaching thermal equilibrium is the fastest.
When the temperature of the temperature measuring environment changes, the temperature representation value collected by the signal detection end of the thermocouple also changes, the control module 102 adjusts the compensation voltage according to the calculated temperature of the temperature measuring environment, the temperature compensation module 101 compensates the temperature of the cold end and changes along with the temperature change of the temperature measuring environment, the thermal balance between the temperature measuring end and the cold end of the sensor is kept all the time, and the temperature sensor can always accurately measure the temperature.
It should be noted that the cold end of the temperature sensor in this embodiment refers to the other end of the temperature sensor relative to the temperature measuring end, that is, the end of the temperature sensor which is not usually installed in the temperature measuring environment. When the temperature sensor is installed, the temperature measuring end (or the hot end) is installed in a temperature measuring environment, and the temperature measuring environment can be air or a medium, such as liquid temperature in a pipeline. At this time, the temperature measuring end of the temperature sensor is inserted into the liquid inside the pipeline through a preset temperature measuring hole on the pipeline, the terminal is located in the external environment, the temperature compensation module 101 is located in the temperature measuring environment, and the temperature compensation module 101 can be located on the inner wall of the pipeline for improving the compensation efficiency. That is, the temperature compensation module 101 abuts against the inner wall of the pipe, and the terminal abuts against the outer wall of the pipe, and in this method, the temperature compensation module 101 performs temperature compensation on the cold end through the pipe, which is limited by the material and heat transfer rate of the pipe. In order to avoid the influence brought by the pipeline, a slightly larger hole can be selected for the temperature measuring hole on the pipeline, so that the temperature compensation module 101 can be abutted against the cold end of the temperature sensor 100, and the temperature compensation module 101 is in direct contact with the cold end, so that the efficiency of temperature compensation can be improved, and the compensation error can be reduced. Of course, the sealing work of the pipeline needs to be done because the opening of the temperature measuring hole is large, and the methods are many and will not be discussed in detail.
In one embodiment, the temperature compensation module 101 includes a heating wire electrically connected to an output terminal of the control module 102, and generates heat under the action of the compensation voltage to perform temperature compensation on the cold end of the temperature sensor 100.
The heating wire may also be referred to as a heating wire or a heating wire. The heating wire is divided into an iron-chromium-aluminum heating wire and a nickel-chromium heating wire, the former is cheaper in cost, and the latter is mainly selected after the temperature measuring environment exceeds 1000 ℃. Therefore, when the temperature compensation module 101 is a heating wire for measuring the temperature of the liquid in the pipeline, an iron-chromium-aluminum heating wire is generally used.
In this embodiment, the temperature compensation module 101 selects a heating wire, the heating wire is connected to the output end of the control module 102, and the power supply module 103 provides a compensation voltage for heating the heating wire through the output end of the control module 102. The heating wire sleeve is established on temperature sensor 100's protective case, forms fine contact with protective case, is favorable to conducting the cold junction of temperature sensor 100 with the whole heats that compensation voltage produced, carries out temperature compensation to the cold junction.
In the using process, the protective sleeve sleeved with the heating wire is positioned in the temperature measuring environment, and the liquid in the pipeline is detected by the temperature sensor as an example. Temperature sensor's temperature measurement end is inserted in liquid, the protective case that the heater strip was established to the cover is arranged in the pipeline, because liquid is whole occupy the pipeline unnecessarily, protective case one end when the heater strip was established to the cover is not submergence in liquid, the temperature that the protective case one end of heater strip was established to the cover can slightly be less than the temperature of temperature measurement end, and the terminal is because in external environment, the temperature measurement environment is big more with the external environment difference in temperature, the terminal heat dissipation is more, the temperature that leads to terminal department can be far less than the temperature of temperature measurement end, thus, when the heater strip did not open temperature compensation, temperature sensor is because temperature measurement end and cold junction are difficult for reaching thermal balance, can lead to inaccurate temperature measurement. Therefore, in order to ensure that the temperature at the cold end and the temperature of the temperature measuring end reach thermal balance, the cold ends of the heating wires and the temperature sensor are abutted, so that the heating wires directly carry out temperature compensation on the cold ends, the heat transfer error of the temperature sensor is eliminated, and the technical effect of realizing accurate temperature measurement simply and conveniently is achieved.
In this embodiment, the first input terminal of the control module 102 is electrically connected to the signal detection terminal of the temperature sensor 100, and collects a signal of the signal detection terminal (temperature measurement terminal) of the temperature sensor, so as to calculate the temperature of the temperature measurement environment, and the control module 102 controls the output of the compensation voltage according to the calculated temperature of the temperature measurement environment. If the temperature of the external environment is substantially constant, for example, in a constant temperature laboratory environment, the control module 102 may calculate the compensation voltage according to the temperature of the temperature measurement environment and a fixed deviation value without considering the fluctuation of the external environment, where the fixed deviation value is calculated according to the temperature of the constant temperature laboratory environment.
In one embodiment, the control module 102 includes an acquisition unit 401 and a processing unit 402, as shown in fig. 4, the acquisition unit 401 is configured to acquire a temperature characteristic value of a temperature measurement environment detected by a temperature sensor, and the processing unit 402 is configured to determine a first temperature value of the temperature measurement environment according to the temperature characteristic value and determine a compensation voltage output by the control module 102 according to the first temperature value.
In this embodiment, the control module 102 may include an acquisition unit 401 and a processing unit 402. The acquisition unit 401 acquires a temperature representation value of a temperature measurement environment detected by the temperature sensor by connecting with a signal output end of the temperature sensor, and the processing unit 402 calculates a compensation voltage to be output according to the temperature representation value.
The other end of the protective sleeve for measuring the temperature is additionally provided with the heating wire, the heating wire can form a small resistance wire heater, the resistance wire heater is provided with input power by the control module 102, the power of the resistance wire heater, which is provided by the control module 102, is controlled according to the temperature input by the control module 102, the heat transfer quantity is in direct proportion to the heat transfer temperature difference, when the measured temperature is higher, the heat quantity emitted to the environment through the sensor is increased, the output power of the control module 102 is increased, the heat productivity of the heating wire is increased, and therefore the heat transfer from the protective sleeve at the hot end of the sensor to the outside is reduced.
When the heating wire is not powered on, heat is radiated to the environment from the cold end to the temperature measuring end. At this time, the temperature of the temperature measuring point > the temperature of the cold end > the temperature of the external environment. When the heating wire is added, the temperature of the heating wire = the temperature of the cold end = the temperature of the temperature measuring point, at this time, under the same condition, when comparing with the non-heating wire, the temperature of the cold end of the heating wire > the temperature of the cold end of the non-heating wire, and the heating power of the heating wire is related to the temperature of the temperature measuring end, so the temperature of the electric heating wire is equal to the temperature of the cold end and is close to the temperature of the temperature measuring end, thus the heat transmission between the temperature measuring end and the cold end is greatly reduced, the temperature drop of the temperature measuring end can be reduced, and the measured temperature is closer to the temperature of the measured object.
The electric heating wire and the protective sleeve are well contacted, if the electric heating wire is applied to a laboratory, the environmental temperature is generally 20 ℃, the temperature of a measured object is large, the variation range is wide, and the measurement range is generally about 100 ℃, so the external heat dissipation capacity of the cold end is also changed, the heating power of the heating wire needs to be simply controlled, and the heating power is changed according to the change of the measured temperature. The control module 102 controls the heating power of the heating wire with the input temperature signal.
The signal collected by the temperature sensor is input into the control module 102, and then the control module 102 obtains the temperature 300 ℃ measured by the temperature sensor, and the temperature is subtracted from the environmental temperature 20 ℃ stored in the control module 102, so as to obtain the difference 280 ℃ between the measured object temperature and the environmental temperature. Based on the 280 ℃ temperature difference, the resistance of the heating wire 1 Ω (here, 1 Ω is an example, it does not mean that the resistance of the heating wire must be 1 Ω, and the resistance of the heating wire can be selected according to actual heating requirements), and the formula obtained by experimental simulation stored in the control module 102
The voltage output by the control module 102 is 0.905V, and the heating wire is heated according to 0.82W, so that the heat is just compensated to flow from the temperature measuring end of the sensor to the cold end. The temperature of the cold end and the temperature of the temperature measuring end are balanced, the heat transfer error of the temperature sensor is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot accurately measure the temperature are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
In an embodiment, the acquisition unit 401 is further configured to acquire a second temperature value of an external environment where the cold end is located, the processing unit 402 obtains a temperature difference according to the first temperature value and the second temperature value, and determines the compensation voltage output by the control module 102 according to the temperature difference and a preset mapping relationship, where the mapping relationship is a mapping relationship between the temperature difference and the compensation voltage.
The collection unit 401 can be used for collecting a second temperature value of the external environment where the cold end is located except for collecting a temperature representation value of the temperature measurement environment detected by the temperature sensor, and when the temperature of the external environment is collected, a common thermometer can be used or the temperature of the external environment input by a user can be collected. The processing unit 402 calculates a first temperature value representing the temperature measurement environment according to the temperature characteristic value of the temperature measurement environment, calculates a temperature difference according to the first temperature value and a second temperature value representing the external environment temperature, and calculates a compensation voltage required to be output by the control module 102 according to the temperature difference.
In the following, the temperature sensor is taken as a thermocouple, the temperature compensation module 101 is taken as a heating wire, the temperature measurement environment is taken as the interior of the pipeline, and the control module 102 includes an acquisition unit 401 and a processing unit 402 for illustration.
The heating wire cover is established on temperature sensor's protective case, forms fine contact with protective case, is favorable to conducting the cold junction to temperature sensor with whole heats that compensating voltage produced, carries out temperature compensation to the cold junction. The heating wire is connected to the output end of the control module 102, and the power supply module 103 provides the compensation voltage for heating to the heating wire through the output end of the control module 102. In the use, the protective case that the heater strip was established to the cover is arranged in the temperature measurement environment, the temperature measurement end of thermocouple is inserted in the liquid of pipeline, the cold junction of thermocouple is in the external environment outside the pipeline, when the heater strip did not open temperature compensation, the temperature of protective case one end that the heater strip was established to the cover can slightly be less than temperature measurement end temperature, the temperature of cold end department can be far less than the temperature of temperature measurement end, like this, temperature sensor can lead to can not the accurate measurement temperature because temperature measurement end and cold junction are difficult for reaching thermal balance. After temperature compensation is started, the acquisition unit 401 acquires a temperature characteristic value of a temperature measurement environment detected by the temperature sensor and a second temperature value representing the external environment temperature, the processing unit 402 calculates a first temperature value representing the temperature measurement environment temperature according to the temperature characteristic value, and calculates a temperature difference according to the first temperature value and the second temperature value. For example, the first temperature value representing the temperature measuring environment is 300 ℃, the second temperature value representing the external environment temperature is 20 ℃, and the temperature difference is the difference between the first temperature value and the second temperature value, i.e. 280 ℃. After the temperature difference is obtained, the processing module determines the compensation voltage output by the control module 102 according to the temperature difference and a preset mapping relationship, where the mapping relationship is a mapping relationship between the temperature difference and the compensation voltage.
The heating wire is electrically connected with the output end of the control module 102, and generates heat under the action of compensation voltage to perform temperature compensation on the cold end of the thermocouple. In order to ensure that heat generated by the heating wire is conducted to the cold end of the thermocouple, the cold ends of the heating wire and the thermocouple are abutted together in the installation process, so that the heat generated by the heating wire is fully absorbed by the cold end, the cold end and the temperature measuring end of the thermocouple keep good thermal balance, the heat transfer error of the thermocouple is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot accurately measure the temperature are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved. In this case, when the temperature of the temperature measuring environment changes, for example, when the temperature rises, the temperature characteristic value acquired by the thermocouple also changes. And then the first temperature value rises, the temperature difference is increased, the compensation voltage output by the control module 102 rises, and the heat generated by the heating wire increases, so that the temperature of the cold end of the thermocouple also rises, and the temperature of the cold end is kept to be approximately equal to the temperature of the temperature measuring end all the time. The temperature of the cold end and the temperature of the temperature measuring end are balanced thermally, the heat transfer error of the temperature sensor is eliminated, the technical problems that the temperature sensor has obvious heat transfer error and cannot measure the temperature accurately are solved, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
In a second embodiment of the present application, a temperature compensation method is provided, as shown in fig. 5, which is applied to a control module in a temperature compensation device in the first embodiment, and the method includes:
The control module is connected with a signal output port of the temperature sensor and used for acquiring a temperature representation value detected by the temperature sensor.
The control module can determine the temperature of the detection end of the temperature sensor according to the temperature characterization value, and determines the output compensation voltage according to the temperature of the detection end and the mapping relation between the temperature of the detection end preset in the control module and the compensation voltage. Of course, in order to control more accurately, the control module determines the output compensation voltage according to the temperature difference between the temperature of the detection end and the external environment temperature and the mapping relation between the temperature difference preset in the control module and the compensation voltage. The mapping relationship may be a corresponding table of the temperature difference and the compensation voltage, or may be a specific operation formula, for example, when the resistance of the temperature compensation module is 1 Ω, the operation formula of the compensation voltage and the temperature difference is:
after the temperature difference is obtained, the control module can calculate the compensation voltage according to a formula. The compensation voltage acts on the temperature compensation module to perform temperature compensation on the cold end of the temperature sensor, so that the temperatures of the cold end and the detection end of the temperature sensor approach to the same temperature.
By using the compensation method, the compensation voltage can be output through the control module according to the temperature representation value detected by the temperature detection end of the temperature sensor, the temperature compensation is carried out on the cold end of the temperature sensor, the heat transfer errors of the detection end and the cold end of the temperature sensor are eliminated, and the technical effect of simply and conveniently realizing accurate temperature measurement is achieved.
In a third embodiment of the present application, there is provided a temperature detection device, as shown in fig. 6, which includes a temperature sensor and the temperature compensation device of the first embodiment. The temperature compensation device at least comprises: the temperature compensation module is used for compensating the temperature of the cold end of the temperature sensor.
The temperature detection device using the temperature compensation device can eliminate the heat transfer error of the temperature sensor, solve the technical problem that the temperature sensor has obvious heat transfer error and can not accurately measure the temperature, and achieve the technical effect of simply and conveniently realizing accurate temperature measurement.
As shown in fig. 7, a fourth embodiment of the present application provides an electronic device, which includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, where the processor 111, the communication interface 112, and the memory 113 complete communication with each other through the communication bus 114.
The memory 113 stores a computer program.
In an embodiment of the present application, when the processor 111 is configured to execute a program stored in the memory 113, a method for temperature compensation provided in the foregoing method embodiment is implemented, including:
acquiring a temperature representation value of a temperature measurement environment detected by a temperature sensor;
determining the compensation voltage output by the control module according to the temperature representation value; the compensation voltage is used for temperature compensation of the cold end of the temperature sensor.
The communication bus mentioned in the above terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of a temperature compensation method as provided in the foregoing method embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A temperature compensation device, applied to a temperature sensor, the temperature compensation device comprising: the temperature compensation module and the control module;
the control module is used for determining the compensation voltage output by the control module according to the temperature representation value of the temperature measurement environment detected by the temperature sensor;
the temperature compensation module is used for heating the cold end of the temperature sensor according to the compensation voltage so as to perform temperature compensation;
the temperature compensation module is sleeved on the protective sleeve of the temperature sensor and is close to the cold end of the temperature sensor;
the first input end of the control module is electrically connected with the signal detection end of the temperature sensor, and the signal detection end is used for detecting the temperature representation value of the temperature measurement environment; the second input end of the control module is electrically connected with the power supply module; the output end of the control module is electrically connected with the temperature compensation module;
the control module comprises an acquisition unit and a processing unit;
the acquisition unit is used for acquiring a temperature representation value of a temperature measurement environment detected by the temperature sensor;
the processing unit is used for determining a first temperature value of the temperature measuring environment according to the temperature characterization value and determining the compensation voltage output by the control module according to the first temperature value;
or the acquisition unit is also used for acquiring a second temperature value of the external environment where the cold end is located;
the processing unit is further used for obtaining a temperature difference according to the first temperature value and the second temperature value, and determining a compensation voltage output by the control module according to the temperature difference and a preset mapping relation; the mapping relation is a mapping relation between the temperature difference and the compensation voltage.
2. The temperature compensation device of claim 1, further comprising: a power supply module; the power supply module is electrically connected with the control module and used for supplying power to the temperature compensation module through the control module.
3. The temperature compensation device of claim 1, wherein the temperature compensation module abuts a cold end of the temperature sensor.
4. The temperature compensation apparatus of claim 1, wherein the temperature compensation module comprises a heating wire;
the heating wire is electrically connected with the output end of the control module, and generates heat under the action of the compensation voltage, so that the cold end of the temperature sensor is subjected to temperature compensation.
5. A temperature compensation method applied to the temperature compensation device according to any one of claims 1 to 4, the method comprising:
acquiring a temperature representation value of a temperature measurement environment detected by a temperature sensor;
determining the compensation voltage output by the control module according to the temperature characterization value; the compensation voltage is used for carrying out temperature compensation on the cold end of the temperature sensor.
6. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing the communication between the processor and the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the steps of the temperature compensation method of claim 5 when executing a program stored in the memory.
7. A temperature detection device comprising a temperature sensor and the temperature compensation device according to any one of claims 1 to 4.
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| JP3829637B2 (en) * | 2001-03-27 | 2006-10-04 | 株式会社山武 | Temperature measuring device |
| CN103398793A (en) * | 2013-08-20 | 2013-11-20 | 国家电网公司 | Temperature measuring device based on thermocouple cold end compensation technology |
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