CN116878680A - Continuous surface intelligent thermocouple with self-checking device - Google Patents

Continuous surface intelligent thermocouple with self-checking device Download PDF

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Publication number
CN116878680A
CN116878680A CN202310944694.3A CN202310944694A CN116878680A CN 116878680 A CN116878680 A CN 116878680A CN 202310944694 A CN202310944694 A CN 202310944694A CN 116878680 A CN116878680 A CN 116878680A
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China
Prior art keywords
temperature
thermocouple
temperature measurement
data
condition
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CN202310944694.3A
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Inventor
汪利宝
周永祥
卢永慧
吴海勇
刘伟
杨新军
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SHANGHAI JINGPU ELECTROMECHANICAL TECHNOLOGY CO LTD
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SHANGHAI JINGPU ELECTROMECHANICAL TECHNOLOGY CO LTD
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Priority to CN202310944694.3A priority Critical patent/CN116878680A/en
Publication of CN116878680A publication Critical patent/CN116878680A/en
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/005—Calibration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/007—Testing

Abstract

The invention provides a continuous surface intelligent thermocouple with a self-checking device, which judges whether the thermocouple has a temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple, and effectively identifies the historical temperature measurement state of the thermocouple; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and the temperature state distinguishing and identifying are carried out on the temperature measuring area, so that the accurate mark identification is carried out on the temperature abnormal part in the temperature measuring area.

Description

Continuous surface intelligent thermocouple with self-checking device
Technical Field
The invention relates to the technical field of thermocouples, in particular to a continuous surface intelligent thermocouple with a self-checking device.
Background
The thermocouple connects two different metal conductors, utilizes the difference of the thermal expansion coefficients of the different metal conductors, generates potential difference after being heated, and then calculates the temperature of the current thermocouple detection area according to the potential difference. When the temperature of the detection area is higher, the thermal expansion deformation of the metal conductor of the thermocouple is larger, if the metal conductor is continuously in a limit thermal expansion deformation state for a long time, the metal conductor cannot be restored to an initial state when the external temperature is reduced, and the thermocouple cannot be restored to a normal temperature measurement state. The thermocouple is directly placed in the detection environment when the thermocouple is used for temperature measurement in the prior art, and the thermocouple is not tested in advance to judge whether the thermocouple is in a normal temperature measurement state or not. If the thermocouple cannot recover to the normal temperature measurement state after the last temperature measurement operation, the temperature measurement accuracy and reliability of the thermocouple can be affected.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a continuous surface intelligent thermocouple with a self-checking device, which judges whether the thermocouple has a temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple, and effectively identifies the historical temperature measurement state of the thermocouple; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and obtaining temperature distribution state information of the temperature measuring region according to the obtained actual temperature measuring data, so as to distinguish and identify the temperature state of the temperature measuring region, and ensure accurate mark identification of the temperature abnormal part in the temperature measuring region.
The invention provides a continuous surface intelligent thermocouple comprising a self-checking device, which comprises the following components:
the thermocouple temperature measurement load identification module is used for judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple;
the thermocouple temperature measurement verification sub-module is used for performing temperature measurement verification on the thermocouple with the condition of temperature measurement overload and determining whether the thermocouple is restored to a normal temperature measurement state;
the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple;
the temperature measuring area identification module is used for analyzing the obtained actual temperature measuring data to obtain temperature distribution state information of the temperature measuring area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
Further, the thermocouple temperature measurement load identification module is used for judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple, and comprises the following steps:
Acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; the historical temperature measurement related data comprise potential difference data generated by the last historical temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing assembly of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
the thermocouple temperature measurement verification submodule is used for carrying out temperature measurement verification on a thermocouple with temperature measurement overload condition, and determining whether the thermocouple is restored to a normal temperature measurement state or not comprises the following steps:
when the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the condition of known temperature linear change with temperature data corresponding to the condition of known temperature linear change, and if the temperature measurement data are matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched with the thermocouple, determining that the thermocouple is not restored to a normal temperature measurement state.
Further, the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple, including:
determining a minimum temperature change difference value of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a minimum temperature change value which can be detected by the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value which can be detected and reducing the temperature detection range of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple, and comprises the following steps:
and re-acquiring actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
Further, the temperature measuring region identification module is used for analyzing the re-acquired actual temperature measuring data to obtain temperature distribution state information of the temperature measuring region; according to the temperature distribution state information, carrying out temperature state distinguishing and identifying on the temperature measuring area, wherein the distinguishing and identifying comprise the following steps:
Analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-temperature subarea existing in the temperature measuring area and the position information of the over-temperature subarea in the temperature measuring area according to the temperature field distribution state information.
The invention also provides a temperature measurement correction method of the continuous surface intelligent thermocouple with the self-checking device, which comprises the following steps:
step S1, judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple; if the temperature of the thermocouple is higher than the normal temperature, performing temperature measurement verification on the thermocouple to determine whether the thermocouple is restored to the normal temperature measurement state;
step S2, determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to actual temperature measuring data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple and re-acquiring actual temperature measurement data of the thermocouple;
s3, analyzing the re-acquired actual temperature measurement data to obtain temperature distribution state information of the temperature measurement area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
Further, in the step S1, according to the historical temperature measurement related data of the thermocouple, whether the thermocouple has an overload condition of temperature measurement in the historical temperature measurement process is judged; if so, carrying out temperature measurement verification on the thermocouple, and determining whether the thermocouple is restored to a normal temperature measurement state or not, wherein the method comprises the following steps:
acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; the historical temperature measurement related data comprise potential difference data generated by the last historical temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing assembly of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
when the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the condition of known temperature linear change with temperature data corresponding to the condition of known temperature linear change, and if the temperature measurement data are matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched with the thermocouple, determining that the thermocouple is not restored to a normal temperature measurement state.
Further, in the step S1, comparing the temperature measurement data generated by the thermocouple under the known temperature linear variation condition with the temperature data corresponding to the known temperature linear variation condition, and determining whether the temperature measurement data and the temperature data match, includes:
step S101, obtaining a comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition according to the temperature measurement data generated by the thermocouple under the known temperature linear change condition by using the following formula (1),
in the above formula (1), Q represents a comprehensive comparison temperature array of temperature measurement data generated by the thermocouple under a known temperature linear variation condition; q (a) represents an a-th thermometry data generated by the thermocouple under a known temperature linear variation condition; n represents the total number of temperature measurement data generated by the thermocouple under the condition of known temperature linear change;indicating that taking the value of a from 1 to n into brackets results in brackets to a maximum value; />Indicating that taking the value of a from 1 to n into brackets results in brackets to the minimum value; />Representing the values of a from 1 to n being taken into brackets to obtain the mode of all values in brackets;
Q (1), Q (2), Q (3) correspond to the sequence element values from left to right in the array respectively;
step S102, obtaining a comprehensive comparison result according to the comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition and the temperature data corresponding to the known temperature linear change condition by utilizing the following formula (2),
in the above formula (2), K represents the comprehensive comparison result; y (a) represents a-th temperature data corresponding to the known temperature linear change condition; f { } represents the zero-detection function, wherein the function value of the zero-detection function is 1 if the value in the bracket is 0, and the function value of the zero-detection function is 0 if the value in the bracket is not 0;
step S103, comparing the temperature measurement data generated by the thermocouple under the known temperature linear change condition with the temperature data corresponding to the known temperature linear change condition one by one to obtain a one-by-one comparison value by utilizing the following formula (3), and judging whether the temperature measurement data are matched with the temperature data or not by combining the comprehensive comparison result control,
in the above formula (3), P represents a determination value of whether or not the temperature measurement data and the temperature data match; b (a) represents a comparison value of the a-th temperature data one by one;
If p=1, it means that the temperature measurement data matches with the temperature data;
if p=0, it indicates that the temperature measurement data does not match the temperature data.
Further, in the step S2, according to the actual temperature measurement data of the thermocouple, determining temperature change attribute information of a temperature measurement region corresponding to the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple and re-acquiring the actual temperature measurement data of the thermocouple, wherein the method comprises the following steps:
determining a minimum temperature change difference value of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a minimum temperature change value which can be detected by the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value which can be detected and reducing the temperature detection range of the thermocouple; and re-acquiring actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
Further, in the step S3, the obtained actual temperature measurement data is analyzed to obtain temperature distribution state information of the temperature measurement area; according to the temperature distribution state information, carrying out temperature state distinguishing and identifying on the temperature measuring area, wherein the distinguishing and identifying comprise the following steps:
Analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-temperature subarea existing in the temperature measuring area and the position information of the over-temperature subarea in the temperature measuring area according to the temperature field distribution state information.
Compared with the prior art, the continuous surface intelligent thermocouple with the self-checking device judges whether the thermocouple has a temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple, and effectively identifies the historical temperature measurement state of the thermocouple; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and obtaining temperature distribution state information of the temperature measuring region according to the obtained actual temperature measuring data, so as to distinguish and identify the temperature state of the temperature measuring region, and ensure accurate mark identification of the temperature abnormal part in the temperature measuring region.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a continuous surface intelligent thermocouple with a self-test device.
FIG. 2 is a schematic flow chart of a temperature measurement correction method of a continuous surface intelligent thermocouple with a self-checking device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a schematic structural diagram of a continuous surface intelligent thermocouple with a self-checking device according to an embodiment of the present invention is shown. This contain self-checking device's continuous surface intelligence thermocouple includes:
the thermocouple temperature measurement load identification module is used for judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple;
the thermocouple temperature measurement verification sub-module is used for carrying out temperature measurement verification on the thermocouple with the condition of temperature measurement overload and determining whether the thermocouple is restored to a normal temperature measurement state;
the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple;
the temperature measuring area identification module is used for analyzing the obtained actual temperature measuring data to obtain temperature distribution state information of the temperature measuring area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
The beneficial effects of the technical scheme are as follows: according to the continuous surface intelligent thermocouple with the self-checking device, whether the thermocouple has a temperature measurement overload condition in the historical temperature measurement process is judged according to the historical temperature measurement related data of the thermocouple, and the historical temperature measurement state of the thermocouple is effectively identified; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and obtaining temperature distribution state information of the temperature measuring region according to the obtained actual temperature measuring data, so as to distinguish and identify the temperature state of the temperature measuring region, and ensure accurate mark identification of the temperature abnormal part in the temperature measuring region.
Preferably, the thermocouple temperature measurement load identification module is configured to determine, according to historical temperature measurement related data of a thermocouple, whether a temperature measurement overload condition occurs in a historical temperature measurement process of the thermocouple, and includes:
acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; wherein, the history temperature measurement related data comprises potential difference data generated by the last history temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing component of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
the thermocouple temperature measurement verification submodule is used for carrying out temperature measurement verification on a thermocouple with temperature measurement overload condition, determining whether the thermocouple is restored to a normal temperature measurement state or not, and comprises the following steps:
when the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the known temperature linear change condition with temperature data corresponding to the known temperature linear change condition, and if the temperature measurement data is matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched, the thermocouple is determined not to be restored to the normal temperature measurement state.
The beneficial effects of the technical scheme are as follows: the temperature sensing assembly consisting of two different metal conductors in the thermocouple can generate linear thermal expansion with different degrees under the action of external temperature change, so that potential difference is generated between the two metal conductors, and the potential difference and the thermal expansion deformation of the metal conductors are in positive correlation. Under normal conditions, the potential difference between the two metal conductors is in positive correlation with the external temperature of the thermocouple, when the range of the thermal expansion deformation size of the metal conductor of the temperature sensing assembly exceeds the range of the allowable thermal expansion size of the metal conductor, if the external temperature is reduced, the metal conductor also needs a long time to recover to the original characteristic of being capable of carrying out linear thermal expansion deformation, and at the moment, the thermocouple is in a temperature measurement failure state, and normal temperature detection cannot be carried out. Because the potential difference between the two metal conductors always has positive correlation with the thermal expansion deformation of the metal conductors, potential difference data generated by the last historical temperature measurement operation of the thermocouple are analyzed, the thermal expansion deformation information of the temperature sensing component of the thermocouple in the last historical temperature measurement operation is obtained through inversion, if the thermal expansion deformation size in the thermal expansion deformation information exceeds the range of the allowable thermal expansion size of the metal conductors, the situation that the metal conductors have excessive thermal expansion is indicated, and then the situation that the thermocouple has temperature measurement overload is determined. When the thermocouple has the condition of temperature measurement overload, temperature measurement data generated by the thermocouple under the condition of known temperature linear change is compared with temperature data corresponding to the condition of known temperature linear change, wherein the condition of known temperature linear change refers to a condition that temperature rises or falls at a constant speed according to a preset linear speed. If the temperature change speed of the temperature measurement data obtained by the thermocouple is the same as the temperature change speed of the known temperature linear change condition, the thermocouple is indicated to be restored to a normal temperature measurement state; if the temperature of the thermocouple is different, the thermocouple is indicated to be not restored to the normal temperature measurement state, and therefore whether the thermocouple can normally measure the temperature can be effectively verified.
Preferably, the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple, including:
determining the minimum temperature change difference value of the temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a detectable minimum temperature change value of the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the detectable minimum temperature change value and reducing the temperature detection range of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple, and comprises the following steps:
and re-acquiring the actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
The beneficial effects of the technical scheme are as follows: when the thermocouple is restored to the normal temperature measurement state, the actual temperature measurement data of the thermocouple are analyzed, and the minimum temperature change value of the thermocouple in the temperature measurement area aimed at in the current temperature measurement process is determined, so that whether the temperature change degree of the temperature measurement area is obvious or not is quantitatively identified. And judging whether the minimum temperature change difference value is larger than the minimum temperature change value detectable by the thermocouple, and when the minimum temperature change difference value is larger than the minimum temperature change value detectable by the thermocouple, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value detectable by the thermocouple and reducing the temperature detection range of the thermocouple, so that the temperature can be accurately detected when the external temperature is slightly changed, and the temperature detection precision of the thermocouple is ensured.
Preferably, the temperature measuring region identification module is used for analyzing the re-acquired actual temperature measuring data to obtain temperature distribution state information of the temperature measuring region; according to the temperature distribution state information, the temperature state distinguishing and identifying of the temperature measuring area comprises the following steps:
analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-high temperature subarea existing in the temperature measuring area and the position information of the over-high temperature subarea in the temperature measuring area according to the temperature field distribution state information.
The beneficial effects of the technical scheme are as follows: analyzing the obtained actual temperature measurement data to obtain isotherm distribution information about different temperature values in the space where the temperature measurement region is located, and determining a subarea with average temperature greater than a preset temperature threshold value as an overtemperature subarea according to the isotherm distribution information; and determining the position information of the over-high temperature subarea in the temperature measuring area, so as to accurately calibrate the over-high temperature subarea.
Referring to fig. 2, a flow chart of a temperature measurement correction method for a continuous surface intelligent thermocouple with a self-checking device according to an embodiment of the invention is shown. The temperature measurement correction method of the continuous surface intelligent thermocouple with the self-checking device comprises the following steps:
Step S1, judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple; if the temperature of the thermocouple is higher than the normal temperature, the thermocouple is subjected to temperature measurement verification, and whether the thermocouple is restored to the normal temperature measurement state is determined;
step S2, determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to actual temperature measuring data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple and re-acquiring actual temperature measurement data of the thermocouple;
s3, analyzing the re-acquired actual temperature measurement data to obtain temperature distribution state information of the temperature measurement area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
The beneficial effects of the technical scheme are as follows: according to the temperature measurement correction method of the continuous surface intelligent thermocouple with the self-checking device, whether the thermocouple has a temperature measurement overload condition in the historical temperature measurement process is judged according to the historical temperature measurement related data of the thermocouple, and the historical temperature measurement state of the thermocouple is effectively recognized; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and obtaining temperature distribution state information of the temperature measuring region according to the obtained actual temperature measuring data, so as to distinguish and identify the temperature state of the temperature measuring region, and ensure accurate mark identification of the temperature abnormal part in the temperature measuring region.
Preferably, in the step S1, according to the historical temperature measurement related data of the thermocouple, whether the thermocouple has an overload condition of temperature measurement in the historical temperature measurement process is judged; if so, carrying out temperature measurement verification on the thermocouple, and determining whether the thermocouple is restored to a normal temperature measurement state or not, wherein the method comprises the following steps:
acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; wherein, the history temperature measurement related data comprises potential difference data generated by the last history temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing component of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
when the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the known temperature linear change condition with temperature data corresponding to the known temperature linear change condition, and if the temperature measurement data is matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched, the thermocouple is determined not to be restored to the normal temperature measurement state.
The beneficial effects of the technical scheme are as follows: the temperature sensing assembly consisting of two different metal conductors in the thermocouple can generate linear thermal expansion with different degrees under the action of external temperature change, so that potential difference is generated between the two metal conductors, and the potential difference and the thermal expansion deformation of the metal conductors are in positive correlation. Under normal conditions, the potential difference between the two metal conductors is in positive correlation with the external temperature of the thermocouple, when the range of the thermal expansion deformation size of the metal conductor of the temperature sensing assembly exceeds the range of the allowable thermal expansion size of the metal conductor, if the external temperature is reduced, the metal conductor also needs a long time to recover to the original characteristic of being capable of carrying out linear thermal expansion deformation, and at the moment, the thermocouple is in a temperature measurement failure state, and normal temperature detection cannot be carried out. Because the potential difference between the two metal conductors always has positive correlation with the thermal expansion deformation of the metal conductors, potential difference data generated by the last historical temperature measurement operation of the thermocouple are analyzed, the thermal expansion deformation information of the temperature sensing component of the thermocouple in the last historical temperature measurement operation is obtained through inversion, if the thermal expansion deformation size in the thermal expansion deformation information exceeds the range of the allowable thermal expansion size of the metal conductors, the situation that the metal conductors have excessive thermal expansion is indicated, and then the situation that the thermocouple has temperature measurement overload is determined. When the thermocouple has the condition of temperature measurement overload, temperature measurement data generated by the thermocouple under the condition of known temperature linear change is compared with temperature data corresponding to the condition of known temperature linear change, wherein the condition of known temperature linear change refers to a condition that temperature rises or falls at a constant speed according to a preset linear speed. If the temperature change speed of the temperature measurement data obtained by the thermocouple is the same as the temperature change speed of the known temperature linear change condition, the thermocouple is indicated to be restored to a normal temperature measurement state; if the temperature of the thermocouple is different, the thermocouple is indicated to be not restored to the normal temperature measurement state, and therefore whether the thermocouple can normally measure the temperature can be effectively verified.
Preferably, in the step S1, comparing the temperature measurement data generated by the thermocouple under the known temperature linear variation condition with the temperature data corresponding to the known temperature linear variation condition, and determining whether the temperature measurement data and the temperature data match includes:
step S101, obtaining a comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition according to the temperature measurement data generated by the thermocouple under the known temperature linear change condition by using the following formula (1),
in the above formula (1), Q represents a comprehensive comparison temperature array of temperature measurement data generated by the thermocouple under a known temperature linear variation condition; q (a) represents the a-th temperature measurement data generated by the thermocouple under the condition of known temperature linear change; n represents the total number of temperature measurement data generated by the thermocouple under the condition of known temperature linear change;indicating that taking the value of a from 1 to n into brackets results in brackets to a maximum value; />Indicating that taking the value of a from 1 to n into brackets results in brackets to the minimum value; />Representing the values of a from 1 to n being taken into brackets to obtain the mode of all values in brackets;
q (1), Q (2), Q (3) correspond to the sequence element values from left to right in the array respectively;
Step S102, utilizing the following formula (2), obtaining a comprehensive comparison result according to a comprehensive comparison temperature array of temperature measurement data generated by the thermocouple under the known temperature linear change condition and temperature data corresponding to the known temperature linear change condition,
in the above formula (2), K represents the comprehensive comparison result; y (a) represents a-th temperature data corresponding to the known temperature linear change condition; f { } represents the zero-detection function, wherein the function value of the zero-detection function is 1 if the value in the bracket is 0, and the function value of the zero-detection function is 0 if the value in the bracket is not 0;
step S103, comparing the temperature measurement data generated by the thermocouple under the known temperature linear change condition with the temperature data corresponding to the known temperature linear change condition one by one to obtain a one-by-one comparison value by utilizing the following formula (3), and judging whether the temperature measurement data is matched with the temperature data or not by combining the comprehensive comparison result control,
in the above formula (3), P represents a determination value of whether or not the temperature measurement data and the temperature data match; b (a) represents a comparison value of the a-th temperature data one by one;
if p=1, it means that the temperature measurement data matches with the temperature data;
if p=0, it means that the temperature measurement data does not match the temperature data.
The beneficial effects of the technical scheme are as follows: according to the temperature measurement data generated by the thermocouple under the known temperature linear change condition, the comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition is obtained by utilizing the formula (1), so that comparison is performed from the integral angle, and the reliability of data comparison is ensured; then, according to the formula (2), the comprehensive comparison result is obtained according to the comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition and the temperature data corresponding to the known temperature linear change condition, so that comprehensive automatic and complete calculation is realized, and system automation is reflected; finally, by utilizing the formula (3), comparing the temperature measurement data generated by the thermocouple under the known temperature linear change condition with the temperature data corresponding to the known temperature linear change condition one by one to obtain a one-by-one comparison value, and combining the comprehensive comparison result control to judge whether the temperature measurement data is matched with the temperature data or not, further automatically judging whether the temperature measurement data is matched or not according to the comparison results in various aspects, and embodying the intellectualization of the system.
Preferably, in the step S2, temperature change attribute information of a temperature measurement region corresponding to the thermocouple is determined according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, the temperature measurement action parameters of the thermocouple are adjusted, and the actual temperature measurement data of the thermocouple are obtained again, including:
Determining the minimum temperature change difference value of the temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a detectable minimum temperature change value of the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the detectable minimum temperature change value and reducing the temperature detection range of the thermocouple; and re-acquiring actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
The beneficial effects of the technical scheme are as follows: when the thermocouple is restored to the normal temperature measurement state, the actual temperature measurement data of the thermocouple are analyzed, and the minimum temperature change value of the thermocouple in the temperature measurement area aimed at in the current temperature measurement process is determined, so that whether the temperature change degree of the temperature measurement area is obvious or not is quantitatively identified. And judging whether the minimum temperature change difference value is larger than the minimum temperature change value detectable by the thermocouple, and when the minimum temperature change difference value is larger than the minimum temperature change value detectable by the thermocouple, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value detectable by the thermocouple and reducing the temperature detection range of the thermocouple, so that the temperature can be accurately detected when the external temperature is slightly changed, and the temperature detection precision of the thermocouple is ensured.
Preferably, in the step S3, the obtained actual temperature measurement data is analyzed to obtain temperature distribution state information of the temperature measurement region; according to the temperature distribution state information, the temperature state distinguishing and identifying of the temperature measuring area comprises the following steps:
analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-high temperature subarea existing in the temperature measuring area and the position information of the over-high temperature subarea in the temperature measuring area according to the temperature field distribution state information.
The beneficial effects of the technical scheme are as follows: analyzing the obtained actual temperature measurement data to obtain isotherm distribution information about different temperature values in the space where the temperature measurement region is located, and determining a subarea with average temperature greater than a preset temperature threshold value as an overtemperature subarea according to the isotherm distribution information; and determining the position information of the over-high temperature subarea in the temperature measuring area, so as to accurately calibrate the over-high temperature subarea.
According to the content of the embodiment, the continuous surface intelligent thermocouple with the self-checking device and the temperature measurement correction method judge whether the overload condition of temperature measurement occurs in the historical temperature measurement process of the thermocouple according to the historical temperature measurement related data of the thermocouple, and effectively identify the historical temperature measurement state of the thermocouple; the thermocouple is subjected to temperature measurement verification, whether the thermocouple is restored to a normal temperature measurement state or not is determined, and the fact that actual temperature measurement is carried out only after the thermocouple is restored to the normal temperature measurement state is ensured; determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, adjusting temperature measuring action parameters of the thermocouple, and re-acquiring the actual temperature measuring data of the thermocouple, so that the thermocouple can be ensured to perform temperature detection in a temperature measuring mode which is most matched with the temperature change state of the detection area, and the accuracy of the actual temperature measuring data is improved to the greatest extent; and obtaining temperature distribution state information of the temperature measuring region according to the obtained actual temperature measuring data, so as to distinguish and identify the temperature state of the temperature measuring region, and ensure accurate mark identification of the temperature abnormal part in the temperature measuring region.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (9)

1. Contain self-checking device's continuous surface intelligence thermocouple, characterized by includes:
the thermocouple temperature measurement load identification module is used for judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple;
the thermocouple temperature measurement verification sub-module is used for performing temperature measurement verification on the thermocouple with the condition of temperature measurement overload and determining whether the thermocouple is restored to a normal temperature measurement state;
the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple;
the temperature measuring area identification module is used for analyzing the obtained actual temperature measuring data to obtain temperature distribution state information of the temperature measuring area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
2. The continuous surface intelligent thermocouple comprising a self-test device according to claim 1, wherein: the thermocouple temperature measurement load identification module is used for judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple, and comprises the following steps:
acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; the historical temperature measurement related data comprise potential difference data generated by the last historical temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing assembly of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
the thermocouple temperature measurement verification submodule is used for carrying out temperature measurement verification on a thermocouple with temperature measurement overload condition, and determining whether the thermocouple is restored to a normal temperature measurement state or not comprises the following steps:
when the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the condition of known temperature linear change with temperature data corresponding to the condition of known temperature linear change, and if the temperature measurement data are matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched with the thermocouple, determining that the thermocouple is not restored to a normal temperature measurement state.
3. The continuous surface intelligent thermocouple comprising a self-test device according to claim 1, wherein: the thermocouple temperature measurement adjustment module is used for determining temperature change attribute information of a temperature measurement area corresponding to the thermocouple according to actual temperature measurement data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple, including:
determining a minimum temperature change difference value of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a minimum temperature change value which can be detected by the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value which can be detected and reducing the temperature detection range of the thermocouple;
the thermocouple temperature measurement execution module is used for re-acquiring actual temperature measurement data of the thermocouple, and comprises the following steps:
and re-acquiring actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
4. The continuous surface intelligent thermocouple comprising a self-test device according to claim 1, wherein: the temperature measuring region identification module is used for analyzing the re-acquired actual temperature measuring data to obtain temperature distribution state information of the temperature measuring region; according to the temperature distribution state information, carrying out temperature state distinguishing and identifying on the temperature measuring area, wherein the distinguishing and identifying comprise the following steps:
Analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-temperature subarea existing in the temperature measuring area and the position information of the over-temperature subarea in the temperature measuring area according to the temperature field distribution state information.
5. The method for temperature measurement correction of a continuous surface intelligent thermocouple comprising a self-test device according to any one of claims 1 to 4, comprising the steps of:
step S1, judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple; if the temperature of the thermocouple is higher than the normal temperature, performing temperature measurement verification on the thermocouple to determine whether the thermocouple is restored to the normal temperature measurement state;
step S2, determining temperature change attribute information of a temperature measuring area corresponding to the thermocouple according to actual temperature measuring data of the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple and re-acquiring actual temperature measurement data of the thermocouple;
S3, analyzing the re-acquired actual temperature measurement data to obtain temperature distribution state information of the temperature measurement area; and according to the temperature distribution state information, distinguishing and identifying the temperature state of the temperature measuring area.
6. The method for calibrating the temperature of the continuous surface intelligent thermocouple with the self-checking device according to claim 5, wherein the method comprises the following steps:
in the step S1, judging whether the thermocouple has temperature measurement overload condition in the historical temperature measurement process according to the historical temperature measurement related data of the thermocouple; if so, carrying out temperature measurement verification on the thermocouple, and determining whether the thermocouple is restored to a normal temperature measurement state or not, wherein the method comprises the following steps:
acquiring historical temperature measurement related data generated by the last historical temperature measurement operation of the thermocouple; the historical temperature measurement related data comprise potential difference data generated by the last historical temperature measurement operation of the thermocouple;
according to the potential difference data, obtaining thermal expansion deformation information of the temperature sensing assembly of the thermocouple in the last historical temperature measuring operation;
judging whether the temperature sensing assembly generates excessive thermal expansion according to the thermal expansion deformation information, and if so, determining that the thermocouple generates temperature measurement overload condition;
When the thermocouple has the condition of temperature measurement overload, comparing temperature measurement data generated by the thermocouple under the condition of known temperature linear change with temperature data corresponding to the condition of known temperature linear change, and if the temperature measurement data are matched with the temperature data, determining that the thermocouple is restored to a normal temperature measurement state; if the thermocouple is not matched with the thermocouple, determining that the thermocouple is not restored to a normal temperature measurement state.
7. The thermometric correction method for thermocouples as in claim 6, wherein:
in the step S1, comparing the temperature measurement data generated by the thermocouple under the known temperature linear variation condition with the temperature data corresponding to the known temperature linear variation condition, and determining whether the temperature measurement data and the temperature data match, including:
step S101, obtaining a comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition according to the temperature measurement data generated by the thermocouple under the known temperature linear change condition by using the following formula (1),
in the above formula (1), Q represents a comprehensive comparison temperature array of temperature measurement data generated by the thermocouple under a known temperature linear variation condition; q (a) represents an a-th thermometry data generated by the thermocouple under a known temperature linear variation condition; n represents the total number of temperature measurement data generated by the thermocouple under the condition of known temperature linear change; Indicating that taking the value of a from 1 to n into brackets results in brackets to a maximum value; />Indicating that taking the value of a from 1 to n into brackets results in brackets to the minimum value; />Representing the values of a from 1 to n being taken into brackets to obtain the mode of all values in brackets;
q (1), Q (2), Q (3) correspond to the sequence element values from left to right in the array respectively;
step S102, obtaining a comprehensive comparison result according to the comprehensive comparison temperature array of the temperature measurement data generated by the thermocouple under the known temperature linear change condition and the temperature data corresponding to the known temperature linear change condition by utilizing the following formula (2),
in the above formula (2), K represents the comprehensive comparison result; y (a) represents a-th temperature data corresponding to the known temperature linear change condition; f { } represents the zero-detection function, wherein the function value of the zero-detection function is 1 if the value in the bracket is 0, and the function value of the zero-detection function is 0 if the value in the bracket is not 0;
step S103, comparing the temperature measurement data generated by the thermocouple under the known temperature linear change condition with the temperature data corresponding to the known temperature linear change condition one by one to obtain a one-by-one comparison value by utilizing the following formula (3), and judging whether the temperature measurement data are matched with the temperature data or not by combining the comprehensive comparison result control,
In the above formula (3), P represents a determination value of whether or not the temperature measurement data and the temperature data match; b (a) represents a comparison value of the a-th temperature data one by one;
if p=1, it means that the temperature measurement data matches with the temperature data;
if p=0, it indicates that the temperature measurement data does not match the temperature data.
8. The method for calibrating the temperature of the continuous surface intelligent thermocouple with the self-checking device according to claim 5, wherein the method comprises the following steps:
in the step S2, according to the actual temperature measurement data of the thermocouple, determining temperature change attribute information of a temperature measurement region corresponding to the thermocouple; according to the temperature change attribute information, adjusting the temperature measurement action parameters of the thermocouple and re-acquiring the actual temperature measurement data of the thermocouple, wherein the method comprises the following steps:
determining a minimum temperature change difference value of a temperature measuring area corresponding to the thermocouple according to the actual temperature measuring data of the thermocouple, and taking the minimum temperature change difference value as the temperature change attribute information;
judging whether the minimum temperature change difference value is larger than a minimum temperature change value which can be detected by the thermocouple, if so, adjusting the detection sensitivity of the thermocouple to the minimum temperature change value which can be detected and reducing the temperature detection range of the thermocouple; and re-acquiring actual temperature measurement data of the thermocouple after the detection sensitivity and the temperature detection range are changed.
9. The method for calibrating the temperature of the continuous surface intelligent thermocouple with the self-checking device according to claim 5, wherein the method comprises the following steps:
in the step S3, the re-acquired actual temperature measurement data is analyzed to obtain temperature distribution state information of the temperature measurement area; according to the temperature distribution state information, carrying out temperature state distinguishing and identifying on the temperature measuring area, wherein the distinguishing and identifying comprise the following steps:
analyzing the obtained actual temperature measurement data to obtain temperature field distribution state information of the temperature measurement area; the temperature field distribution state information comprises isotherm distribution information of the temperature measuring region corresponding to different temperature values;
and identifying the over-temperature subarea existing in the temperature measuring area and the position information of the over-temperature subarea in the temperature measuring area according to the temperature field distribution state information.
CN202310944694.3A 2023-07-31 2023-07-31 Continuous surface intelligent thermocouple with self-checking device Pending CN116878680A (en)

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