阅读说明：本技术 一种变电站一次充油设备温度计指示故障判断方法及装置 (Method and device for judging indication fault of thermometer of primary oil filling equipment of transformer substation ) 是由 刘杨 蒋林高 陈栩 高潮 黄孟童 肖洒 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种变电站一次充油设备温度计指示故障判断方法,步骤S1、获取设置在一次设备三相上的现场表计的温度读数和设置在一次设备三相上的温度传感器上传的后台温度数据；步骤S2、检测同一相上的所述温度读数和所述后台温度数据是否相差超过设定的第一阈值,若是,则执行步骤S3,否则回到步骤S1；步骤S3、自动确认所述现场表计的温度读数,然后执行步骤S4；步骤S4、根据所述一次设备在三相上的现场表计的温度读数之间的温度差和所述一次设备在三相上的后台温度数据之间的温度差以自动确认异常项。能够快速准确地判断出故障的来源具体在现场表计或后台温度数据的哪一相出现问题,对工作人员进行提示,帮助检修人员快速准确地查找出具体的故障来源。(The invention discloses a method for judging indication faults of a thermometer of primary oil-filled equipment of a transformer substation, which comprises the following steps of S1, acquiring temperature readings of field meters arranged on three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment; step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1; step S3, automatically confirming the temperature reading of the site meter, and then executing step S4; step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases. The method can quickly and accurately judge which phase of the on-site meter or background temperature data has a problem in the source of the fault, prompt workers and help the maintainers to quickly and accurately find out the source of the fault.)

1. A method for judging the indication fault of a thermometer of primary oil filling equipment of a transformer substation is characterized by comprising the following steps:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

2. The method for judging the thermometer indicating fault of the primary oil filling equipment of the transformer substation according to claim 1, wherein the step S3 further comprises:

calling an intelligent inspection robot, an unmanned aerial vehicle or a temperature measuring cloud deck, photographing and confirming field meters arranged on three phases of primary equipment, and obtaining temperature readings of the three-phase field meters through image processing.

3. The method for judging the indication fault of the thermometer of the primary oil-filled device of the transformer substation according to claim 2, wherein the intelligent inspection robot, the unmanned aerial vehicle or the temperature measurement cradle head have an infrared temperature measurement function, and the step S3 further comprises:

starting an infrared temperature measurement function to photograph the three phases of the primary equipment, and reading data according to the corresponding relation between the image and the temperature to obtain the actual temperature of the three phases detected by the infrared temperature measurement function;

the step S4 is followed by the step of:

and step S5, comparing the abnormal temperature corresponding to the abnormal item judged in the step S4 with the actual temperature of the phase corresponding to the abnormal item measured by infrared temperature measurement, and if the temperature difference between the two is greater than a set second threshold value, judging that the fault source is accurate.

4. The method for judging the thermometer indicating fault of the primary oil filling equipment of the transformer substation according to claim 1, wherein the step S4 further comprises:

if the temperature difference of two phases exists in the temperature readings of the three-phase site meter, the temperature difference of the third phase and the other two phases is smaller than a set second threshold, and the temperature difference of any two phases in the background temperature data of the three phases is smaller than a second threshold, judging the site meter of the third phase as an abnormal item, wherein the third threshold is larger than or equal to the second threshold;

if the temperature readings of the site meter of the three phases are that the temperature difference of any two phases is smaller than the second threshold, and the temperature difference of two phases exists in the background temperature data of the three phases and is smaller than the second threshold, and the temperature difference of the third phase and the other two phases is larger than the third threshold, the background temperature data of the third phase is judged to be an abnormal item.

5. The method for judging the indication fault of the thermometer of the primary oil filling equipment of the transformer substation according to claim 1, wherein the first threshold is specifically 5 ℃.

6. The utility model provides a transformer substation's oil filling equipment thermometer instructs trouble judgement device, includes memory, treater and the computer program that stores on the memory and can be operated on the treater, characterized in that, the treater realizes the following step when executing the computer program:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

7. The device for judging the thermometer indicating fault of the primary oil filling equipment of the substation according to claim 6, wherein the step S3 further comprises:

calling an intelligent inspection robot, an unmanned aerial vehicle or a temperature measuring cloud deck, photographing and confirming field meters arranged on three phases of primary equipment, and obtaining temperature readings of the three-phase field meters through image processing.

8. The transformer substation primary oil filling equipment thermometer indicating fault judgment device of claim 7, wherein the intelligent inspection robot, the unmanned aerial vehicle or the temperature measurement cradle head have an infrared temperature measurement function, and the step S3 further comprises:

starting an infrared temperature measurement function to photograph the three phases of the primary equipment, and reading data according to the corresponding relation between the image and the temperature to obtain the actual temperature of the three phases detected by the infrared temperature measurement function;

the step S4 is followed by the step of:

and step S5, comparing the abnormal temperature corresponding to the abnormal item judged in the step S4 with the actual temperature of the phase corresponding to the abnormal item measured by infrared temperature measurement, and if the temperature difference between the two is greater than a set second threshold value, judging that the fault source is accurate.

9. The device for judging the thermometer indicating fault of the primary oil filling equipment of the transformer substation of claim 6, wherein the step S4 further comprises:

if the temperature difference of two phases exists in the temperature readings of the three-phase site meter, the temperature difference of the third phase and the other two phases is smaller than a set second threshold, and the temperature difference of any two phases in the background temperature data of the three phases is smaller than a second threshold, judging the site meter of the third phase as an abnormal item, wherein the third threshold is larger than or equal to the second threshold;

if the temperature readings of the site meter of the three phases are that the temperature difference of any two phases is smaller than the second threshold, and the temperature difference of two phases exists in the background temperature data of the three phases and is smaller than the second threshold, and the temperature difference of the third phase and the other two phases is larger than the third threshold, the background temperature data of the third phase is judged to be an abnormal item.

10. The transformer substation primary oil filling equipment thermometer indicating fault judgment device according to claim 6, wherein the first threshold is specifically 5 ℃.

Technical Field

The invention relates to the technical field of transformer substations, in particular to a method and a device for judging indication faults of a thermometer of primary oil filling equipment of a transformer substation.

Background

The oil immersed transformer and the reactor are important primary equipment of a transformer substation, the problems of oil shortage, internal discharge, overload, cooler fault and the like can be reflected due to abnormal internal temperature, so that the necessity of monitoring the winding temperature and the oil temperature of the transformer and the reactor is realized, the temperature of the primary equipment is checked through an on-site thermometer and a background temperature monitoring mode, the general defect can be judged when the temperature difference between the primary equipment and the background temperature is more than 5 ℃ according to the regulation of the transformer operation standard of the national power grid company, and the abnormal reason needs to be checked.

In the conventional defect processing process, some maintainers randomly modify certain parameters of related equipment in an oil temperature acquisition loop in order to complete a defect elimination task under the condition that the root cause of the defect is not found, when the oil temperature has large fluctuation, the defect appears again, and therefore repeated defect elimination sometimes occurs.

The prior art provides an automatic checking scheme for the background temperature monitoring loop, when a defect occurs, the background temperature monitoring loop is checked, the cable, the platinum resistor, the transmitter and the network transmission of the background temperature loop are checked in sequence, and the judgment is carried out according to the result, which part of the background temperature monitoring loop has a problem, if each detected device of the background temperature monitoring loop has no problem, the problem is judged to be measured on a field meter, but the scheme judges the background temperature monitoring loop at the first time, the field meter has an error when the background monitoring loop has no problem, the response speed is slow when the field meter has an error, the devices passing through the power transformer oil temperature acquisition loop are more, the number of conversion transmission links is also more, the method has the problem of misjudgment caused by misjudgment and is measured on the field meter, so that when the thermometer indicates a fault, the fault can be quickly judged to be an on-site meter or a background temperature monitoring loop.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: when the thermometer indicates a fault, the method and the device can quickly judge whether the fault is a field meter or a background temperature monitoring loop.

In order to solve the technical problems, the invention adopts a technical scheme that: a method for judging the indication fault of a thermometer of primary oil filling equipment of a transformer substation comprises the following steps:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

In order to solve the technical problem, the invention adopts another technical scheme as follows: a thermometer indication fault judgment device for primary oil filling equipment of a transformer substation comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the following steps:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

The invention has the beneficial effects that: according to the three-phase temperature reading of the field meter and the three-phase temperature data of the background, when the temperature reading of the field meter and the temperature data of the background have general defects of thermometer indication faults, the source of the fault can be quickly and accurately judged to be the temperature data of the field meter or the background, the fault is judged to be the temperature data of the field meter or the background, the phase of the temperature data of the field meter or the background is judged to be in a problem, and the fault is prompted to a worker to help the maintainer to quickly and accurately find out the specific fault source.

Drawings

Fig. 1 is a flowchart of a method for determining a fault indicated by a thermometer of a primary oil filling device of a transformer substation according to an embodiment of the present invention;

fig. 2 is a flowchart of a method for determining a fault indicated by a thermometer of a primary oil filling device of a transformer substation according to a second embodiment of the present invention;

fig. 3 is a system block diagram of a device for judging a fault of a thermometer indicator of a primary oil filling device of a transformer substation according to an embodiment of the present invention.

Description of reference numerals:

1. a thermometer indication fault judgment device for a transformer substation primary oil filling device; 2. a memory; 3. a processor.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1-2, an embodiment of the present invention provides a method for determining an indication fault of a thermometer of a primary oil filling device of a transformer substation, including:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

From the above description, the beneficial effects of the present invention are: according to the three-phase temperature reading of the field meter and the three-phase temperature data of the background, when the temperature reading of the field meter and the temperature data of the background have general defects of thermometer indication faults, the source of the fault can be quickly and accurately judged to be the temperature data of the field meter or the background, the fault is judged to be the temperature data of the field meter or the background, the phase of the temperature data of the field meter or the background is judged to be in a problem, and the fault is prompted to a worker to help the maintainer to quickly and accurately find out the specific fault source.

Further, the step S3 further includes:

calling an intelligent inspection robot, an unmanned aerial vehicle or a temperature measuring cloud deck, photographing and confirming field meters arranged on three phases of primary equipment, and obtaining temperature readings of the three-phase field meters through image processing.

According to the above description, the intelligent patrol robot, the unmanned aerial vehicle or the temperature measurement cloud platform are called, the field meter is photographed and confirmed, the reading of the field meter is obtained through image processing, inaccurate reading caused by manual detection or station errors can be avoided, and the detection accuracy is enhanced.

Further, robot, unmanned aerial vehicle or temperature measurement cloud platform are patrolled and examined to intelligence have infrared temperature measurement function, step S3 still includes:

starting an infrared temperature measurement function to photograph the three phases of the primary equipment, and reading data according to the corresponding relation between the image and the temperature to obtain the actual temperature of the three phases detected by the infrared temperature measurement function;

the step S4 is followed by the step of:

and step S5, comparing the abnormal temperature corresponding to the abnormal item judged in the step S4 with the actual temperature of the phase corresponding to the abnormal item measured by infrared temperature measurement, and if the temperature difference between the two is greater than a set second threshold value, judging that the fault source is accurate.

As can be seen from the above description, the actual temperature of the primary device is obtained through the infrared temperature measurement function, and the basis of the secondary judgment is obtained through the comparison between the abnormal temperature corresponding to the abnormal item and the actual temperature, and for the suspected situation that the secondary judgment is not passed, the overhaul range needs to be adjusted appropriately according to experience.

Further, the step S4 further includes:

if the temperature difference of two phases exists in the temperature readings of the three-phase site meter, the temperature difference of the third phase and the other two phases is smaller than a set second threshold, and the temperature difference of any two phases in the background temperature data of the three phases is smaller than a second threshold, judging the site meter of the third phase as an abnormal item, wherein the third threshold is larger than or equal to the second threshold;

if the temperature readings of the site meter of the three phases are that the temperature difference of any two phases is smaller than the second threshold, and the temperature difference of two phases exists in the background temperature data of the three phases and is smaller than the second threshold, and the temperature difference of the third phase and the other two phases is larger than the third threshold, the background temperature data of the third phase is judged to be an abnormal item.

From the above description, it can be known that when the temperatures of two phases are close, it indicates that the detected temperatures of the two phases are mutually verified, and there is no abnormality, and the temperature difference between the other phase and the normal phase is larger, which indicates that the abnormal term is the phase having a larger temperature difference from the normal phase, and the method can quickly and accurately find the source of the abnormal term.

Further, the first threshold is specifically 5 ℃.

As can be seen from the above description, the first threshold is set according to the current regulations of the national grid company "transformer operating specifications" to meet the current operating requirements.

Referring to fig. 3, a device for judging a thermometer indication fault of a primary oil-filled device of a transformer substation includes a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the following steps when executing the computer program:

step S1, acquiring temperature readings of field meters arranged on the three phases of the primary equipment and background temperature data uploaded by temperature sensors arranged on the three phases of the primary equipment;

step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a set first threshold, if yes, executing step S3, otherwise returning to step S1;

step S3, automatically confirming the temperature reading of the site meter, and then executing step S4;

step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the primary equipment on the site meters on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

From the above description, the beneficial effects of the present invention are: according to the three-phase temperature reading of the field meter and the three-phase temperature data of the background, when the temperature reading of the field meter and the temperature data of the background have general defects of thermometer indication faults, the source of the fault can be quickly and accurately judged to be the temperature data of the field meter or the background, the fault is judged to be the temperature data of the field meter or the background, the phase of the temperature data of the field meter or the background is judged to be in a problem, and the fault is prompted to a worker to help the maintainer to quickly and accurately find out the specific fault source.

Further, the step S3 further includes:

calling an intelligent inspection robot, an unmanned aerial vehicle or a temperature measuring cloud deck, photographing and confirming field meters arranged on three phases of primary equipment, and obtaining temperature readings of the three-phase field meters through image processing.

According to the above description, the intelligent patrol robot, the unmanned aerial vehicle or the temperature measurement cloud platform are called, the field meter is photographed and confirmed, the reading of the field meter is obtained through image processing, inaccurate reading caused by manual detection or station errors can be avoided, and the detection accuracy is enhanced.

Further, robot, unmanned aerial vehicle or temperature measurement cloud platform are patrolled and examined to intelligence have infrared temperature measurement function, step S3 still includes:

starting an infrared temperature measurement function to photograph the three phases of the primary equipment, and reading data according to the corresponding relation between the image and the temperature to obtain the actual temperature of the three phases detected by the infrared temperature measurement function;

the step S4 is followed by the step of:

and step S5, comparing the abnormal temperature corresponding to the abnormal item judged in the step S4 with the actual temperature of the phase corresponding to the abnormal item measured by infrared temperature measurement, and if the temperature difference between the two is greater than a set second threshold value, judging that the fault source is accurate.

From the above description, the actual temperature of the primary device is obtained through the infrared temperature measurement function, and the basis of the secondary judgment is obtained through the comparison between the abnormal phase and the actual temperature, and for the in-doubt situation that the secondary judgment is not passed, the overhaul range needs to be properly adjusted according to experience.

Further, the step S4 further includes:

if the temperature difference of two phases exists in the temperature readings of the three-phase site meter, the temperature difference of the third phase and the other two phases is smaller than a set second threshold, and the temperature difference of any two phases in the background temperature data of the three phases is smaller than a second threshold, judging the site meter of the third phase as an abnormal item, wherein the third threshold is larger than or equal to the second threshold;

if the temperature readings of the site meter of the three phases are that the temperature difference of any two phases is smaller than the second threshold, and the temperature difference of two phases exists in the background temperature data of the three phases and is smaller than the second threshold, and the temperature difference of the third phase and the other two phases is larger than the third threshold, the background temperature data of the third phase is judged to be an abnormal item.

From the above description, it can be known that when the temperatures of two phases are close, it indicates that the detected temperatures of the two phases are mutually verified, and there is no abnormality, and the temperature difference between the other phase and the normal phase is larger, which indicates that the abnormal term is the phase having a larger temperature difference from the normal phase, and the method can quickly and accurately find the source of the abnormal term.

Further, the first threshold is specifically 5 ℃.

As can be seen from the above description, the first threshold is set according to the current regulations of the national grid company "transformer operating specifications" to meet the current operating requirements.

The method for judging the indication fault of the thermometer of the primary oil-filled equipment of the transformer substation is suitable for quickly and accurately judging whether the equipment with the fault is positioned in a background temperature monitoring loop or a field meter when the difference between the field meter and background temperature data of the primary equipment of the transformer substation exceeds 5 ℃, wherein the primary equipment comprises a transformer and a reactor, and the field meter comprises a winding temperature meter and an oil temperature meter.

Example one

Referring to fig. 1, a method for judging a fault indicated by a thermometer of a primary oil filling device of a transformer substation includes the following steps:

and step S1, acquiring temperature readings of the site meters arranged on the three phases of the primary equipment and background temperature data uploaded by the temperature sensors arranged on the three phases of the primary equipment.

Step S2, detecting whether the difference between the temperature reading and the background temperature data on the same phase exceeds a first threshold, if yes, executing step S3, otherwise, returning to step S1.

Specifically, the first threshold refers to a threshold for judging the occurrence of general defects, and is specifically 5 ℃ according to the current regulation of transformer operating specifications of national grid company.

Step S3, the temperature reading of the site meter is automatically confirmed, and then step S4 is executed.

Specifically, in an actual operation field, the field meter is composed of a Current Transformer (CT) connection wire, a current matcher, an electric heating element, an indicating pointer, a potentiometer and a digital display meter, which are generally connected to a transformer and a high-resistance non-electric quantity protection screen and used as input quantity of relay protection to trigger corresponding equipment to trip or send an oil temperature high signal and a temperature high signal to a background or start an auxiliary cooler fan to cool, and two methods are generally adopted for confirming the temperature reading of the field meter:

firstly, sending out an intelligent inspection robot or an unmanned aerial vehicle, carrying out photo-taking confirmation on A, B and C three-phase on-site meters of primary equipment, obtaining temperature readings of the three-phase on-site meters through image processing,

secondly, a temperature measuring cloud platform is built on the newer site of part of equipment, the meter photos shot by the temperature measuring cloud platform can be called at the moment, and data reading is carried out according to image recognition, so that A, B and the site meter temperature of the phase C of primary equipment are obtained.

And step S4, automatically confirming abnormal items according to the temperature difference between the temperature readings of the site meters of the primary equipment on the three phases and the temperature difference between the background temperature data of the primary equipment on the three phases.

Specifically, if the temperature readings of the three-phase site meters indicate that the temperature difference between two phases is smaller than the second threshold, the temperature difference between the third phase and the other two phases is larger than the third threshold, and the background temperature data of the three phases and the temperature difference between any two phases are smaller than the second threshold, it is determined that the fault source is the third phase of the site meter, and the third phase of the site meter is determined to be an abnormal item, and the site meter of the third phase needs to be inspected, repaired or replaced.

If the temperature readings of the site meter of the three phases are that the temperature difference of any two phases is smaller than the second threshold, the background temperature data of the three phases has the temperature difference of the two phases smaller than the second threshold, and the temperature difference of the third phase and the other two phases is larger than the third threshold, the fault source is judged to be the third phase of the background temperature data of the three phases, the third phase of the background temperature data of the three phases is judged to be an abnormal item, then the obstacle source is further judged to be a PT100 platinum resistor, a transmitter or a network, and the specific fault phase is overhauled, and the fault source judgment of the background temperature data is not repeated in the prior art.

In this embodiment, the second threshold is specifically 2 ℃, the third threshold is a confidence threshold with a larger temperature difference, the third threshold is greater than or equal to the second threshold, and the temperature difference between the two temperatures is larger, and the third threshold is determined by a service man according to an empirical value according to a specific working condition.

Example two

Referring to fig. 2, in the method for judging a fault of a thermometer indicator of a primary oil-filled device of a transformer substation according to the present embodiment, on the basis of the first embodiment, the intelligent inspection robot, the temperature measurement platform, or the unmanned aerial vehicle has an infrared temperature measurement function, and the step S3 further includes: and (3) starting an infrared temperature measurement function to photograph A, B and C phases of the primary equipment, reading data according to the corresponding relation between the image and the temperature, and obtaining the actual temperature of the three phases detected by the temperature measurement function.

And step S5, comparing the abnormal phase judged in the step S4 with the actual temperature of the phase corresponding to the abnormal item obtained by infrared temperature measurement, and judging the fault source to be accurate if the temperature difference between the abnormal phase and the actual temperature is greater than a set fourth threshold value.

EXAMPLE III

As shown in fig. 3, a device 1 for judging a fault indicated by a thermometer of a primary oil-filled device of a transformer substation includes a memory 2, a processor 3, and a computer program stored in the memory 2 and operable on the processor 3, where the processor 3 implements a method for judging a fault indicated by a thermometer of a primary oil-filled device of a transformer substation according to one or two of the above embodiments when executing the program.

According to the method and the device for judging the indication fault of the thermometer of the primary oil-filled equipment of the transformer substation, when the temperature reading of the field meter and the background temperature data have the common defect of more than 5 ℃, the temperature reading of the field meter and the background temperature data can be quickly and accurately judged, the temperature data of the field meter or the background can be quickly and accurately judged, the phase of the temperature data of the field meter or the background can be judged to have the problem, the judgment result can be secondarily confirmed, and the detection accuracy is further improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.