CN114674447A - Temperature compensation measuring method and device and computer equipment - Google Patents
Temperature compensation measuring method and device and computer equipment Download PDFInfo
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- CN114674447A CN114674447A CN202210458362.XA CN202210458362A CN114674447A CN 114674447 A CN114674447 A CN 114674447A CN 202210458362 A CN202210458362 A CN 202210458362A CN 114674447 A CN114674447 A CN 114674447A
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- 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
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Abstract
The application provides a temperature compensation measuring method, a temperature compensation measuring device and computer equipment, relates to the technical field of temperature sensors, and is used for improving the accuracy of temperature measurement on the basis of shortening the response time of temperature measurement. The method mainly comprises the following steps: acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment; calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient; wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
Description
Technical Field
The present disclosure relates to the field of temperature sensor technologies, and in particular, to a temperature compensation measuring method and apparatus, a computer device, and a storage medium.
Background
Digital temperature sensors are widely used in measurement systems and play an important role in temperature control systems. However, due to the influence of factors such as the thermal capacity and the thermal resistance of the temperature sensor, a relatively serious temperature response delay exists, and in addition, the response time of temperature measurement is further prolonged by external packaging for protecting the temperature sensor in a temperature control system, so that the temperature measurement accuracy is seriously influenced.
Disclosure of Invention
The embodiment of the application provides a temperature compensation measurement method and device, computer equipment and a storage medium, which are used for improving the accuracy of temperature measurement on the basis of shortening the response time of temperature measurement.
The embodiment of the invention provides a temperature compensation measuring method, which comprises the following steps:
acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment;
calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
The embodiment of the invention provides a temperature compensation measuring device, which comprises:
the acquisition module is used for acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment;
the calculation module is used for calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the temperature compensation method when executing the computer program.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the temperature compensation method as described above.
The invention provides a temperature compensation measuring method, a device, computer equipment and a storage medium, which comprises the steps of firstly obtaining a measured temperature value at the current moment, a measured temperature value at the last moment and a compensation temperature value at the last moment, and then calculating the compensation temperature at the current moment according to the measured temperature value at the current moment, the measured temperature value at the last moment and the compensation temperature value at the last moment, a first parameter, a second parameter and a proportionality coefficient. The proportional coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportional coefficient, the sampling time interval and the time constant of the temperature sensor. Compared with the prior art that the temperature can be accurately measured only by staying for a period of time, the method can calculate the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient after the measurement temperature is only required to be obtained at the current moment, so that the accuracy of temperature measurement can be improved on the basis of shortening the response time of temperature measurement.
Drawings
FIG. 1 is a flow chart of a temperature compensation measurement method provided herein;
FIG. 2 is a flow chart of time constant determination for a temperature sensor provided herein;
FIG. 3 is a schematic structural diagram of a temperature compensation measuring device provided in the present application;
fig. 4 is a schematic diagram of a computer device provided herein.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and the embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1, a temperature compensation method according to an embodiment of the present invention is applied to a temperature measurement device, such as an electronic thermometer, and the method specifically includes steps S101 to S105:
step S101, obtaining a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment.
The temperature measurement value is a temperature actually measured by the temperature sensor, and the compensation temperature value is a temperature value obtained by correcting the temperature measurement value. It should be noted that the current time in this embodiment is a duration of the current measured temperature, and is a time determined according to the sampling time interval, specifically, the current time is determined according to the number of sampling time intervals that the current time passes. For example, a sampling time interval of 2 seconds and a current time of 6 seconds indicates that a measured temperature value at the thermometer for a time period of 6 seconds and a measured temperature value at the previous time, i.e., a measured temperature value at the thermometer for a time period of 4 seconds, are obtained.
The sampling time interval in this embodiment may be set according to actual requirements, for example, the sampling time interval is 1 second, 2 seconds, 3 seconds, and the like, which is not specifically limited in this embodiment.
Step S102, calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient.
Wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
The scaling factor in this embodiment is proportional to the compensated temperature at the current time. That is, the value of the proportionality coefficient affects the effect of dynamic compensation, and if the value of the proportionality coefficient is too large, overcompensation will occur; and an under-compensation will occur if the value is too small. In actual use, the value of the proportionality coefficient can be determined through experiments and simulation according to actual conditions. Preferably, the value range of the proportionality coefficient is 1-100.
In an optional embodiment of the present invention, calculating the compensated temperature at the current time according to the measured temperature value at the current time, the measured temperature value at the previous time, the compensated temperature value at the previous time, the first parameter, the second parameter, and the scaling factor includes:
calculating a compensation temperature at the current time by a formula Tc (n) ═ a (bts (n) — kTs (n-1) + Tc (n-1));
wherein Tc (n) is the compensation temperature at the current time, Ts (n) is the measurement temperature value at the current time, Ts (n-1) is the measurement temperature value at the previous time, Tc (n-1) is the compensation temperature value at the previous time, n is a natural number, k is the scaling factor, a is the first parameter, and B is the second parameter.
Specifically, N is used to represent the measured temperature value obtained by the last sampling in this embodiment, which can be specifically represented by a natural number from 1 to N. If n is 3, the currently obtained measured temperature value is the temperature measured value obtained by the 3 rd sampling, and the temperature measured value at the previous moment is the temperature measured value obtained by the 2 nd sampling. If the sampling time interval is 2 seconds and n is 3, acquiring the measured temperature value of the thermometer when the duration is 6 seconds and the measured temperature value at the previous moment, namely the measured temperature value of the thermometer when the duration is 4 seconds.
The present embodiment provides a temperature compensation measuring method, which first obtains a measurement temperature value at a current time, a measurement temperature value at a previous time, and a compensation temperature value at the previous time, and then calculates a compensation temperature at the current time according to the measurement temperature value at the current time, the measurement temperature value at the previous time, the compensation temperature value at the previous time, a first parameter, a second parameter, and a scaling factor. The proportional coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportional coefficient, the sampling time interval and the time constant of the temperature sensor. Compared with the prior art that the temperature can be accurately measured only by staying for a period of time, the method can calculate the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient after the measurement temperature is only required to be obtained at the current moment, so that the accuracy of temperature measurement can be improved on the basis of shortening the response time of temperature measurement.
Referring to fig. 2, a method for determining a time constant of a temperature sensor according to an embodiment of the present invention includes steps S201 to S203:
step S201, acquiring temperature drop percentages of the temperature sensors at different sampling moments according to a time sequence.
The sampling time N is 1-N, and the temperature reduction percentages of the temperature sensors at different sampling times are obtained according to the time sequence, namely the temperature reduction percentage of the temperature sensor at the 1 st sampling time, the temperature reduction percentage of the temperature sensor at the 2 nd sampling time and the temperature reduction percentage of the temperature sensor at the 3 rd sampling time are obtained in sequence, namely the temperature reduction percentage of the temperature sensor at the Nth sampling time is … ….
Specifically, the present embodiment determines the temperature drop percentage of the temperature sensor at different times according To the sampling time n and the sampling time interval To. And if the sampling time n is 1-3 and the sampling time interval To is 2 seconds, the temperature drop percentage of the temperature sensor in 4 seconds and the temperature drop percentage of the temperature sensor in 6 seconds are sequentially obtained.
In an optional embodiment of the present invention, the obtaining the temperature decrease percentage of the temperature sensor at different sampling time points according to the time sequence includes:
step S2011 of acquiring a medium temperature T of the temperature sensorθ；
Step S2012, heating the temperature sensor by constant current, and acquiring the temperature T of the temperature sensor when the temperature sensor reaches thermal equilibrium0；
Step S2013, cutting off the heating current of the temperature sensor, and obtaining the body temperature T (mto) of the temperature sensor at a sampling time interval to from the moment of cutting off the current, wherein m is a natural number;
in step S2014, the temperature drop percentage K of the temperature sensor at different sampling times nto is calculated according to the following formula:
for example, the time for the temperature sensor to reach thermal equilibrium is t0The temperature of the temperature sensor corresponding to the time is T0. At this moment, the heating current of the temperature sensor is cut off, and then the acquisition time is t0+tmtoThe body temperature of the respective temperature sensor. Wherein M is 1-M. E.g. t0Corresponding to a time of 10:00:00 and a time of 2 seconds, when m is 1, the body temperature T (to) corresponding to the temperature sensor at time 10:00:02, when m is 2, the body temperature T (2to) corresponding to the temperature sensor at time 10:00:04, when m is 3, the body temperature T (3to) … … corresponding to the temperature sensor at time 10:00:06
Step S202, obtaining a first sampling time when the temperature drop percentage is larger than a preset value.
In this embodiment, after each temperature drop percentage of one temperature sensor is obtained, whether the temperature drop percentage is greater than a preset value is calculated, if the temperature drop percentage of the temperature sensor is greater than the preset value, the temperature drop percentage of the temperature sensor obtained in the next time is determined as a first temperature drop percentage, and then a sampling time corresponding to the first temperature drop percentage is determined.
Step S203, determining the sampling time at which the acquired first temperature drop percentage is greater than a preset value as a time constant of the temperature sensor.
It should be noted that Γ is a time constant of the temperature sensor, is a key parameter that affects the dynamic performance of temperature measurement, and depends on the material and structural characteristics of the temperature sensor itself, and the meaning of the time constant of the temperature sensor is as follows: after a temperature sensor having a certain initial temperature was put in a medium having a constant temperature, the amount of change in the temperature of the temperature sensor reached 63.2% of the time taken for the difference between the medium temperature and the initial temperature of the temperature sensor from zero.
Preferably, the preset value is 63.2%, and the sampling time t corresponding to the first time the temperature drop percentage K is greater than 63.2% is recordedmtoThe time constant Γ of the temperature sensor in this medium and operating condition is equal to tmtoWhen m is 2 and to is 2 seconds, the time constant Γ of the temperature sensor is 4.
Further, after the time constant of the temperature sensor is determined, the first parameter and the second parameter may be calculated according to the time constant of the temperature sensor and the sampling time interval of the scaling factor.
Specifically, the first parameter is calculated by the following formula:
wherein a is the first parameter, τ sample is the sampling time interval, and is set according to the actual sampling time of the temperature sensor, such as 1s and 2s, b is k/Γ, k is the scaling factor, and Γ is the time constant of the temperature sensor.
Specifically, the second parameter is calculated by the following formula:
wherein B is the second parameter, τ sample is the sampling time interval, k is the scaling factor, and Γ is a time constant of the temperature sensor.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, a temperature compensation measuring device is provided, and the temperature compensation measuring device corresponds to the temperature compensation measuring method in the above embodiments one to one. As shown in fig. 3, the functional modules of the temperature compensation measuring device are explained in detail as follows:
the obtaining module 31 is configured to obtain a measured temperature value at a current moment, a measured temperature value at a previous moment, and a compensated temperature value at the previous moment;
the calculation module 32 is configured to calculate a compensation temperature at the current time according to the measured temperature value at the current time, the measured temperature value at the previous time, the compensation temperature value at the previous time, the first parameter, the second parameter, and the scaling factor;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
In an alternative embodiment, the calculation module 32 is specifically configured to:
calculating a compensation temperature at the current time by a formula Tc (n) ═ a (bts (n) — kTs (n-1) + Tc (n-1));
wherein Tc (n) is the compensation temperature at the current time, Ts (n) is the measurement temperature value at the current time, Ts (n-1) is the measurement temperature value at the previous time, Tc (n-1) is the compensation temperature value at the previous time, n is a natural number, k is the scaling factor, a is the first parameter, and B is the second parameter.
In an optional embodiment, the apparatus further comprises a determining module 33;
the obtaining module 31 is further configured to obtain temperature drop percentages of the temperature sensors at different sampling moments according to a time sequence;
the obtaining module 31 is further configured to obtain a first sampling time at which the temperature drop percentage is greater than a preset value;
the determining module 33 is configured to determine a time constant of the temperature sensor as a sampling time at which the obtained first temperature drop percentage is greater than a preset value.
In an optional embodiment, the obtaining module 31 is specifically configured to:
acquiring the medium temperature T of the temperature sensorθ；
Heating the temperature sensor through constant current, and acquiring the temperature T of the temperature sensor when the temperature sensor reaches thermal balance0；
Cutting off the heating current of the temperature sensor, and obtaining the self body temperature T (mto) of the temperature sensor at a time interval to from the moment of cutting off the current, wherein m is a natural number;
the percentage temperature drop K of the temperature sensor at the different sampling times nto is calculated by the following equation:
in an alternative embodiment, the first parameter is calculated by the following formula:
wherein a is the first parameter, τ sample is the sampling interval, b is k/Γ, k is the scaling factor, and Γ is the time constant of the temperature sensor.
In an alternative embodiment, the second parameter is calculated by the following formula:
wherein B is the second parameter, τ sample is the sampling time interval, k is the scaling factor, and Γ is a time constant of the temperature sensor.
In an optional embodiment, the scaling factor has a value in a range of 1 to 100, and the scaling factor is proportional to the compensation temperature at the current time.
For the specific limitation of the temperature compensation measuring device, reference may be made to the above limitation of the temperature compensation measuring method, which is not described herein again. The various modules in the above-described apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 4. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a temperature compensation method.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment;
calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment;
calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of a temperature sensor.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include both non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method of temperature compensation, the method comprising:
acquiring a measurement temperature value at the current moment, a measurement temperature value at the last moment and a compensation temperature value at the last moment;
calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
2. The method of claim 1, wherein calculating the compensated temperature at the current time based on the measured temperature value at the current time, the measured temperature value at the previous time, the compensated temperature value at the previous time, and the first parameter, the second parameter, and the scaling factor comprises:
calculating a compensation temperature at the current time by a formula Tc (n) ═ a (bts (n) — kTs (n-1) + Tc (n-1));
wherein Tc (n) is the compensation temperature at the current time, Ts (n) is the measurement temperature value at the current time, Ts (n-1) is the measurement temperature value at the previous time, Tc (n-1) is the compensation temperature value at the previous time, n is a natural number, k is the scaling factor, a is the first parameter, and B is the second parameter.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
acquiring the temperature drop percentages of the temperature sensors at different sampling moments according to a time sequence;
acquiring a first sampling moment when the temperature drop percentage is larger than a preset value;
and determining the sampling time when the acquired first temperature drop percentage is greater than a preset value as the time constant of the temperature sensor.
4. The method of claim 3, wherein said obtaining the temperature drop percentage of the temperature sensor at different sampling times in time sequence comprises:
acquiring the medium temperature T of the temperature sensorθ；
Heating the temperature sensor through constant current, and acquiring the temperature T of the temperature sensor when the temperature sensor reaches thermal balance0；
Cutting off the heating current of the temperature sensor, and obtaining the self body temperature T (mto) of the temperature sensor at a time interval to from the moment of cutting off the current, wherein m is a natural number;
the percentage temperature drop K of the temperature sensor at the different sampling times nto is calculated by the following equation:
5. the method of claim 3, further comprising:
calculating the first parameter by the following formula:
wherein a is the first parameter, τ sample is the sampling interval, b is k/Γ, k is the scaling factor, and Γ is the time constant of the temperature sensor.
6. The method of claim 3, further comprising:
calculating the second parameter by the following formula:
wherein B is the second parameter, τ sample is the sampling time interval, k is the scaling factor, and Γ is a time constant of the temperature sensor.
7. The method of claim 1, wherein the scaling factor ranges from 1 to 100, and is proportional to the compensated temperature at the current time.
8. A temperature compensation apparatus, the apparatus comprising:
the acquisition module is used for acquiring a measurement temperature value at the current moment, a measurement temperature value at the previous moment and a compensation temperature value at the previous moment;
the calculation module is used for calculating the compensation temperature at the current moment according to the measurement temperature value at the current moment, the measurement temperature value at the previous moment, the compensation temperature value at the previous moment, the first parameter, the second parameter and the proportionality coefficient;
wherein the proportionality coefficient is a constant coefficient, and the first parameter and the second parameter are determined according to the proportionality coefficient, a sampling time interval and a time constant of the temperature sensor.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the temperature compensation method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the temperature compensation method according to any one of claims 1 to 7.
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