A temperature controller contact resistance test early warning method

Abstract

The present invention discloses a method for testing and warning contact resistance of a thermostat, and relates to the technical field of contact resistance testing. The method comprises: judging whether the contact resistance inside the thermostat is abnormal and obtaining the judgment result; judging whether the contact resistance outside the thermostat is abnormal and obtaining the judgment result; analyzing the first judgment result and the second judgment result and selecting corresponding operations according to the analysis result. The present invention performs real-time detection of the contact resistance of the thermostat and performs warning operations according to the detection results, and specifically includes the above three parts; the present invention tests the change of the contact resistance of the thermostat in real time through the above three parts, and ensures and improves the safety, reliability and accuracy of the equipment through effective monitoring and early warning of the contact resistance of the thermostat.

Description

Technical Field

[0001] The invention belongs to the technical field of contact resistance testing, and in particular relates to a temperature controller contact resistance testing early warning method. Background Art

[0002] Thermostat is a device used to monitor and adjust temperature, and is widely used in air conditioning, heating, refrigerators and other systems. The contact resistance of a thermostat refers to the resistance value between the internal or external connection points of the thermostat. These connection points are usually the contact points between the thermostat and the power supply, sensor or actuator (such as relay, heater or cooler). The size of the contact resistance will directly affect the performance of the thermostat, such as: current conduction, temperature control accuracy, energy consumption and equipment life.

[0003] During the production and use of thermostats, abnormal changes in contact resistance may affect the thermal response speed and overall performance of the equipment, and even cause safety hazards. Traditionally, the detection of contact resistance usually requires shutdown for offline measurement, which not only increases maintenance costs, but may also cause potential faults to not be discovered in time. Therefore, designing a contact resistance detection and early warning technology to keep the size of the thermostat contact resistance within a reasonable range is crucial to ensure the normal operation of the equipment, improve the overall performance of the system, and extend its service life. Summary of the invention

[0004] The object of the present invention is to provide a temperature controller contact resistance test early warning method, which can be achieved by the following technical solutions:

[0005] The present application provides a temperature controller contact resistance test early warning method, comprising the following steps:

[0006] S1, determine whether the contact resistance inside the thermostat is abnormal and obtain the judgment result, including:

[0007] S11, obtaining a number of internal connection points between internal circuit elements of the temperature controller and forming an internal connection point set;

[0008] S12, based on the internal connection point set, obtaining two adjacent internal connection points and calculating a first temperature difference, a first current value, and a first voltage value therebetween;

[0009] S13, in the same time period, calculating a first thermal response ratio according to the first temperature difference and the first current value, and also calculating a first electric energy consumption according to the first current value and the first voltage value;

[0010] S14, presetting a first thermal response ratio threshold range and a first electric energy consumption threshold range;

[0011] S15, respectively comparing the first thermal response ratio with the first thermal response ratio threshold range, and the first electric energy consumption with the first electric energy consumption threshold range to obtain a first judgment result;

[0012] S2, judging whether the contact resistance outside the thermostat is abnormal and obtaining the judgment result, including:

[0013] S21, acquiring external connection points between the thermostat and the external electrical components and forming an external connection point set;

[0014] S22, based on the external connection point set, obtaining two adjacent external connection points and calculating a second temperature difference, a second current value, and a second voltage value therebetween;

[0015] S23, in the same time period, calculating a second thermal response ratio according to the second temperature difference and the second current value, and calculating a second electric energy consumption according to the second current value and the second voltage value;

[0016] S24, presetting a second thermal response ratio threshold range and a second electric energy consumption threshold range;

[0017] S25, respectively comparing the second thermal response ratio with the second thermal response ratio threshold range, and the second electric energy consumption with the second electric energy consumption threshold range to obtain a second judgment result;

[0018] S3, analyzing the first judgment result and the second judgment result, and selecting corresponding operations according to the analysis results, including performing the next round of monitoring and issuing early warning prompts;

[0019] The first thermal response ratio β is calculated in the same time period, and its formula is expressed as:

[0020] ;

[0021] in, Indicates that in the time period ( , ) is the integral of the first temperature difference over time; Indicates that in the time period ( , ) is the integral of the first current value over time;

[0022] The first electric energy consumption E is calculated in the same time period, and the formula is expressed as:

[0023] ;

[0024] in, represents a first current value; Indicates the first voltage value.

[0025] Preferably, obtaining two adjacent internal connection points in step S12 includes:

[0026] S121, using a brute force search method to obtain an internal connection point pair with the shortest distance in the internal connection point set;

[0027] S122, arbitrarily selecting one of the internal connection points as an internal detection origin, and selecting the other internal connection point as an internal detection secondary point;

[0028] S123, taking the internal detection origin and the internal detection secondary point as two adjacent internal connection points;

[0029] S124, after calculating the first temperature difference, the first current value, and the first voltage value, updating two adjacent internal connection points;

[0030] S125, repeating step S124 until all internal connection points in the internal connection point set have been calculated;

[0031] Among them, if there are multiple internal connection points in the internal connection point set that are connected to the internal detection sub-point and have the shortest distance, one of them is selected.

[0032] Preferably, in step S124, two adjacent internal connection points are updated, specifically:

[0033] Taking the internal detection secondary point as an endpoint, obtaining an internal connection point in the internal connection point set that is connected to the internal detection secondary point and has the shortest distance, and using the obtained internal connection point as an updated internal detection secondary point;

[0034] The original internal detection sub-point is used as the updated internal detection origin, and is combined with the updated internal detection sub-point to form two updated adjacent internal connection points.

[0035] Preferably, in step S121, a brute force search method is used to obtain the internal connection point pair, including:

[0036] Traverse all the connection point pairs in the internal connection point set, expressed as: ( , ),i <j;

[0037] Calculate the inner points of each connection point pair ( , ) and dot ( , ), expressed as:

[0038] d= ;

[0039] Compare the currently calculated distance with the known minimum distance. If the currently calculated distance is smaller, update the minimum distance and the corresponding connection point pair.

[0040] Output the inner connection point pairs with the smallest distance.

[0041] Preferably, calculating the first temperature difference, the first current value, and the first voltage value between two adjacent internal connection points includes the following contents:

[0042] Using a temperature sensor to detect and obtain a first position temperature at a location where an internal detection origin is located;

[0043] Using a temperature sensor to detect and obtain a second position temperature at a location where the internal detection sub-point is located;

[0044] Calculating the first temperature difference according to the first position temperature and the second position temperature;

[0045] Using a current sensor to detect and obtain a first current value between two adjacent internal connection points;

[0046] A voltage sensor is used to detect and obtain a first voltage value between two adjacent internal connection points.

[0047] Preferably, in step S14, the first thermal response ratio threshold range and the first electric energy consumption threshold range are preset, specifically:

[0048] Data collection: Collect the internal operation data of the thermostat within the historical time period, including the internal historical current value, internal historical voltage value and internal historical temperature difference;

[0049] Interval division: divide the historical time period into multiple time intervals;

[0050] Threshold calculation: calculating the internal initial thermal response ratio threshold range within multiple time intervals according to the internal historical current value and the internal historical temperature difference; calculating the internal initial electric energy consumption threshold range within multiple time intervals according to the internal historical current value and the internal historical voltage value;

[0051] Threshold verification: verifying and adjusting the internal initial thermal response ratio threshold range and the internal initial electric energy consumption threshold range based on the internal operation data to determine a final first thermal response ratio threshold range and a first electric energy consumption threshold range;

[0052] The historical time period refers to the time range before the current detection time period.

[0053] Preferably, in step S22, a divide-and-conquer method is used to obtain two adjacent external connection points, including:

[0054] S221, sorting the external connection point set according to a coordinate rule;

[0055] S222, dividing the sorted external connection point set into a left half point set and a right half point set;

[0056] S223, calling the divide-and-conquer algorithm to recursively process the left half point set and the right half point set respectively, to obtain the distances between the left half adjacent point pairs and the distances between the right half adjacent point pairs;

[0057] S224, selecting the minimum distance between the left half adjacent point pair distances and the right half adjacent point pair distances;

[0058] S225, respectively obtaining the minimum adjacent point pair corresponding to the minimum distance in the left half point set and the right half point set;

[0059] S226, merging the minimum adjacent point pairs in the left half point set and the right half point set;

[0060] S227, expanding a certain range from the middle dividing line between the left half point set and the right half point set to both the left and right sides, and performing pairwise comparisons on the external connection points within the range, and updating the minimum distance and the corresponding minimum adjacent point pair;

[0061] S228, outputting the minimum distance and taking its corresponding minimum adjacent point pair as two adjacent external connection points;

[0062] Among them, the left half adjacent point pair represents a point pair consisting of two adjacent connection points in the left half point set; the left half adjacent point pair distance represents the distance between two adjacent connection points in the left half point set;

[0063] The right half adjacent point pair represents a point pair consisting of two adjacent connected points in the right half point set; the right half adjacent point pair distance represents the distance between two adjacent connected points in the right half point set.

[0064] Preferably, the second thermal response ratio β' is calculated in the same time period, and its formula is expressed as:

[0065] ;

[0066] in, Indicates that in the time period ( , ) is the integral of the second temperature difference over time; Indicates that in the time period ( , ) is the integral of the second current value over time.

[0067] Preferably, the second electric energy consumption E' is calculated in the same time period, and the formula is expressed as:

[0068] ;

[0069] in, represents a second current value; Indicates the second voltage value.

[0070] Preferably, a corresponding operation is selected according to the analysis result, specifically:

[0071] If the first thermal response ratio exceeds the first thermal response ratio threshold range, and / or the first electric energy consumption exceeds the first electric energy consumption threshold range, the first judgment result is: an abnormality occurs in the contact resistance inside the thermostat, otherwise: no abnormality occurs;

[0072] If the second thermal response ratio exceeds the second thermal response ratio threshold range, and / or the second electric energy consumption exceeds the second electric energy consumption threshold range, the second judgment result is: an abnormality occurs in the contact resistance outside the thermostat, otherwise: no abnormality occurs;

[0073] If the first judgment result and / or the second judgment result is: the contact resistance of the temperature controller is abnormal, an early warning prompt is issued, otherwise the next round of monitoring is carried out.

[0074] The beneficial effects of the present invention are as follows: the present invention performs real-time detection of the contact resistance of the temperature controller and performs early warning operations based on the detection results, and specifically includes three parts: the first part is to determine whether the contact resistance inside the temperature controller is abnormal and obtain the judgment result, the second part is to determine whether the contact resistance outside the temperature controller is abnormal and obtain the judgment result, and the third part is to perform corresponding early warning operations based on the judgment results obtained from the above two parts; the present invention tests the change of the contact resistance of the temperature controller in real time through the above method, and ensures and improves the safety, reliability and accuracy of the equipment through effective monitoring and early warning of the contact resistance of the temperature controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] For better understanding and implementation, the technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0076] Figure 1 A flowchart of a method for testing and warning the contact resistance of a thermostat provided in an embodiment of the present application;

[0077] Figure 2 A flowchart of the steps for obtaining two adjacent internal connection points provided in an embodiment of the present application;

[0078] Figure 3 A flowchart of the steps for obtaining internal connection point pairs provided in an embodiment of the present application;

[0079] Figure 4A flowchart of the steps for presetting a threshold range provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] In order to further explain the technical means and effects taken by the present invention to achieve the predetermined invention purpose, exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of methods and systems consistent with some aspects of the present application as detailed in the attached claims.

[0081] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to any or all possible combinations of one or more associated listed items.

[0082] The specific implementation methods, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0083] See also Figure 1 The present application provides a temperature controller contact resistance test warning method, comprising the following steps:

[0084] S1, determine whether the contact resistance inside the thermostat is abnormal and obtain the judgment result, including:

[0085] S11, obtaining a number of internal connection points between internal circuit elements of the temperature controller and forming an internal connection point set;

[0086] S12, based on the internal connection point set, obtaining two adjacent internal connection points and calculating a first temperature difference, a first current value, and a first voltage value therebetween;

[0087] S13, in the same time period, calculating a first thermal response ratio according to the first temperature difference and the first current value, and also calculating a first electric energy consumption according to the first current value and the first voltage value;

[0088] S14, presetting a first thermal response ratio threshold range and a first electric energy consumption threshold range;

[0089] S15, respectively comparing the first thermal response ratio with the first thermal response ratio threshold range, and the first electric energy consumption with the first electric energy consumption threshold range to obtain a first judgment result;

[0090] S2, judging whether the contact resistance outside the thermostat is abnormal and obtaining the judgment result, including:

[0091] S21, acquiring external connection points between the thermostat and the external electrical components and forming an external connection point set;

[0092] S22, based on the external connection point set, obtaining two adjacent external connection points and calculating a second temperature difference, a second current value, and a second voltage value therebetween;

[0093] S23, in the same time period, calculating a second thermal response ratio according to the second temperature difference and the second current value, and calculating a second electric energy consumption according to the second current value and the second voltage value;

[0094] S24, presetting a second thermal response ratio threshold range and a second electric energy consumption threshold range;

[0095] S25, respectively comparing the second thermal response ratio with the second thermal response ratio threshold range, and the second electric energy consumption with the second electric energy consumption threshold range to obtain a second judgment result;

[0096] S3, analyzing the first judgment result and the second judgment result, and selecting corresponding operations according to the analysis results, including performing the next round of monitoring and issuing early warning prompts.

[0097] Specifically, since abnormal changes in contact resistance of the thermostat during production and use will affect the thermal response speed and overall performance of the device, in order to avoid the performance of the thermostat device being affected by sudden abnormal changes, the present application performs real-time detection of the contact resistance of the thermostat and performs early warning operations based on the detection results. Specifically, it includes three parts: the first part is to determine whether the contact resistance inside the thermostat is abnormal and obtain the judgment result, the second part is to determine whether the contact resistance outside the thermostat is abnormal and obtain the judgment result, and the third part is to perform corresponding early warning operations based on the judgment results obtained from the above two parts.

[0098] Regarding the contents of the above three parts, first, a number of internal connection points between the internal circuit elements of the temperature controller are obtained to form an internal connection point set; then, based on the internal connection point set, two adjacent internal connection points are obtained and the first temperature difference, the first current value and the first voltage value therebetween are calculated; then, within the same time period, the first thermal response ratio is calculated according to the first temperature difference and the first current value; the first electric energy consumption is calculated according to the first current value and the first voltage value; then the first thermal response ratio threshold range and the first electric energy consumption threshold range are preset; finally, the first thermal response ratio is compared with the first thermal response ratio threshold range, and the first electric energy consumption is compared with the first electric energy consumption threshold range, and the first thermal response ratio is compared with the first electric energy consumption threshold range to obtain the first thermal response ratio. A judgment result; then obtain the external connection points between the thermostat and the external electrical components in the same way and form an external connection point set; then based on the external connection point set, obtain two adjacent external connection points and calculate the second temperature difference, second current value and second voltage value between the two; then in the same time period, calculate the second thermal response ratio according to the second temperature difference and the second current value; calculate the second electric energy consumption according to the second current value and the second voltage value; then preset the second thermal response ratio threshold range and the second electric energy consumption threshold range; finally, compare and judge the second thermal response ratio with the second thermal response ratio threshold range, and the second electric energy consumption with the second electric energy consumption threshold range and obtain the second judgment result. The present application tests the change of the contact resistance of the thermostat in real time through the above method, and ensures and improves the safety, reliability and accuracy of the equipment through effective monitoring and early warning of the contact resistance of the thermostat.

[0099] It should be noted that since both the internal and external contact resistance of the thermostat will affect the performance of the thermostat, these two aspects are tested and judged separately in this application to ensure the normal operation and accurate control of the equipment. Among them, the internal contact resistance mainly refers to the connection between internal circuit elements (such as relays, switches), and the contact points between components and solder joints and connectors on the circuit board, etc.; while the external contact resistance mainly refers to the connection points between the thermostat and the external power supply and load (such as terminals or plugs), as well as the contact points between the terminal and the wire.

[0100] like Figure 2 As shown, in an embodiment provided by the present application, obtaining two adjacent internal connection points in step S12 includes:

[0101] S121, using a brute force search method to obtain an internal connection point pair with the shortest distance in the internal connection point set;

[0102] S122, arbitrarily selecting one of the internal connection points as an internal detection origin, and selecting the other internal connection point as an internal detection secondary point;

[0103] S123, taking the internal detection origin and the internal detection secondary point as two adjacent internal connection points;

[0104] S124, after calculating the first temperature difference, the first current value, and the first voltage value, updating two adjacent internal connection points, specifically:

[0105] Taking the internal detection secondary point as an endpoint, obtaining an internal connection point in the internal connection point set that is connected to the internal detection secondary point and has the shortest distance, and using the obtained internal connection point as an updated internal detection secondary point;

[0106] The original internal detection secondary point is used as the updated internal detection origin, and the updated internal detection secondary point is combined to form two updated adjacent internal connection points;

[0107] S125, repeating step S124 until all internal connection points in the internal connection point set have been calculated;

[0108] Among them, if there are multiple internal connection points in the internal connection point set that are connected to the internal detection sub-point and have the shortest distance, one of them is selected.

[0109] like Figure 3 As shown, in an embodiment provided by the present application, in step S121, a brute force search method is used to obtain the internal connection point pair, including:

[0110] Traverse all the connection point pairs in the internal connection point set, expressed as: ( , ),i <j;

[0111] Calculate the inner points of each connection point pair ( , ) and dot ( , ), expressed as:

[0112] d= ;

[0113] Compare the currently calculated distance with the known minimum distance. If the currently calculated distance is smaller, update the minimum distance and the corresponding connection point pair.

[0114] Output the inner connection point pairs with the smallest distance.

[0115] Specifically, this embodiment first uses a brute force search method to obtain an internal connection point pair with the shortest distance, and then uses one connection point in the internal connection point pair as the internal detection origin, the other as the internal detection secondary point, and the two as two adjacent internal connection points. At the same time, after calculating the first temperature difference, the first current value, and the first voltage value, the two adjacent internal connection points are updated, and this step is repeated until all the internal connection points in the above internal connection point set have been calculated. This embodiment uses a brute force search method to check all possible point pairs and ensure that there are no omissions, so it can ensure that the optimal solution is found, thereby ensuring the accuracy of the results; in addition, since the internal connection point set formed by several internal connection points between the internal circuit elements of the temperature controller belongs to a small-scale point set, this method can achieve the best effect.

[0116] It should be noted that the "shortest distance" and "shortest distance" in the above "internal connection point pair with the shortest distance" and "internal connection point in the internal connection point set that is connected to this internal detection sub-point and has the shortest distance" are not the same; the former refers to finding an internal connection point pair with the shortest distance between connection points among several internal connection point pairs (composed of two internal connection points) in the internal connection point set; while the latter refers to taking the internal detection sub-point as the endpoint and finding another internal connection point in the internal connection point set that has the shortest distance after being connected to it. The difference between the two is that the former exists in the form of an internal connection point pair, while the latter exists as a single internal connection point. And the shortest distance shown in the former is determined on the basis of the brute force search method, the purpose of which is to calculate the distance between all point pairs in the point set and find the minimum value.

[0117] In an embodiment provided in the present application, calculating a first temperature difference, a first current value, and a first voltage value between two adjacent internal connection points includes the following contents:

[0118] Using a temperature sensor to detect and obtain a first position temperature at a location where an internal detection origin is located;

[0119] Using a temperature sensor to detect and obtain a second position temperature at a location where the internal detection sub-point is located;

[0120] Calculating the first temperature difference according to the first position temperature and the second position temperature;

[0121] Using a current sensor to detect and obtain a first current value between two adjacent internal connection points;

[0122] A voltage sensor is used to detect and obtain a first voltage value between two adjacent internal connection points.

[0123] In an embodiment provided in the present application, the first thermal response ratio β is calculated in the same time period, and its formula is expressed as:

[0124] ;

[0125] in, Indicates that in the time period ( , ) is the integral of the first temperature difference over time; Indicates that in the time period ( , ) is the integral of the first current value over time.

[0126] Specifically, the first thermal response ratio β can reflect the relationship between the cumulative change in temperature and the cumulative change in current within a specific time period. Monitoring the changes in this ratio helps to evaluate and identify potential faults in the thermostat. For example, if the current increases without a corresponding increase in temperature, it may indicate that the thermostat's heat dissipation is working properly; and if the temperature rises abnormally, it may indicate that there is a fault in the thermostat device.

[0127] In an embodiment provided in the present application, the first electric energy consumption E is calculated in the same time period, and the formula thereof is expressed as follows:

[0128] ;

[0129] in, represents a first current value; Indicates the first voltage value.

[0130] Specifically, since the voltage value changes with time, it is necessary to integrate the product of the first voltage value and the first current value over time. The above method can accurately calculate the power consumption in a specific time period, which helps to indirectly evaluate the size of the contact resistance through energy changes / losses, so as to determine whether the contact point is good and whether the contact resistance is abnormal, thereby effectively improving the reliability of the judgment of abnormal internal contact resistance of the temperature controller.

[0131] like Figure 4 As shown, in an embodiment provided in the present application, the first thermal response ratio threshold range and the first electric energy consumption threshold range are preset in step S14, specifically:

[0132] Data collection: Collect the internal operation data of the thermostat within the historical time period, including the internal historical current value, internal historical voltage value and internal historical temperature difference;

[0133] Interval division: divide the historical time period into multiple time intervals;

[0134] Threshold calculation: calculating the internal initial thermal response ratio threshold range within multiple time intervals according to the internal historical current value and the internal historical temperature difference; and calculating the internal initial electric energy consumption threshold range within multiple time intervals according to the internal historical current value and the internal historical voltage value;

[0135] Threshold verification: verifying and adjusting the internal initial thermal response ratio threshold range and the internal initial electric energy consumption threshold range based on the internal operation data to determine a final first thermal response ratio threshold range and a first electric energy consumption threshold range;

[0136] The historical time period refers to the time range before the current detection time period.

[0137] Specifically, through the above steps, this embodiment can effectively preset the threshold range of the first thermal response ratio and the electric energy consumption, provide a data basis for subsequent abnormal judgment of the contact resistance of the thermostat, and improve the operating efficiency and safety of the thermostat.

[0138] In an embodiment provided by the present application, in step S22, a divide-and-conquer method is used to obtain two adjacent external connection points, including:

[0139] S221, sorting the external connection point set according to a coordinate rule (such as by x coordinate or y coordinate);

[0140] S222, dividing the sorted external connection point set into a left half point set and a right half point set;

[0141] S223, calling the divide-and-conquer algorithm to recursively process the left half point set and the right half point set respectively, to obtain the distances between the left half adjacent point pairs and the distances between the right half adjacent point pairs;

[0142] S224, selecting the minimum distance between the left half adjacent point pair distances and the right half adjacent point pair distances;

[0143] S225, respectively obtaining the minimum adjacent point pair corresponding to the minimum distance in the left half point set and the right half point set;

[0144] S226, merging the minimum adjacent point pairs in the left half point set and the right half point set;

[0145] S227, expanding a certain range from the middle dividing line between the left half point set and the right half point set to both the left and right sides, and performing pairwise comparisons on the external connection points within the range, and updating the minimum distance and the corresponding minimum adjacent point pair;

[0146] S228, outputting the minimum distance and taking its corresponding minimum adjacent point pair as two adjacent external connection points;

[0147] Among them, the left half adjacent point pair represents a point pair consisting of two adjacent connection points in the left half point set; the left half adjacent point pair distance represents the distance between two adjacent connection points in the left half point set;

[0148] The right half adjacent point pair represents a point pair consisting of two adjacent connected points in the right half point set; the right half adjacent point pair distance represents the distance between two adjacent connected points in the right half point set.

[0149] Specifically, this embodiment can effectively use the divide-and-conquer method to obtain two adjacent connection points in the external connection point set through the above steps, and by dividing the problem into smaller sub-problems, the size of each sub-problem is halved, thereby improving data processing efficiency; at the same time, since the sub-problems are relatively independent, parallel calculations can be performed to improve processing speed; and reasonable judgments and calculations in the merging stage are made to avoid repeated comparisons and unnecessary distance calculations, thereby saving calculation time. In summary, using the divide-and-conquer method to obtain two adjacent connection points in the external connection point set can greatly improve data processing efficiency and accuracy, and provide data support for subsequent numerical calculations.

[0150] In an embodiment provided in the present application, the second thermal response ratio β' is calculated in the same time period, and its formula is expressed as:

[0151] ;

[0152] in, Indicates that in the time period ( , ) is the integral of the second temperature difference over time; Indicates that in the time period ( , ) is the integral of the second current value over time.

[0153] In an embodiment provided in the present application, the second electric energy consumption E' is calculated in the same time period, and the formula thereof is expressed as follows:

[0154] ;

[0155] in, represents a second current value; Indicates the second voltage value.

[0156] In an embodiment provided in the present application, a corresponding operation is selected according to the analysis result, specifically:

[0157] If the first thermal response ratio exceeds the first thermal response ratio threshold range, and / or the first electric energy consumption exceeds the first electric energy consumption threshold range, the first judgment result is: an abnormality occurs in the contact resistance inside the thermostat, otherwise: no abnormality occurs;

[0158] If the second thermal response ratio exceeds the second thermal response ratio threshold range, and / or the second electric energy consumption exceeds the second electric energy consumption threshold range, the second judgment result is: an abnormality occurs in the contact resistance outside the thermostat, otherwise: no abnormality occurs;

[0159] If the first judgment result and / or the second judgment result is: the contact resistance of the temperature controller is abnormal, an early warning prompt is issued, otherwise the next round of monitoring is carried out.

[0160] Specifically, in this embodiment, if at least one of the first thermal response ratio and the first electric energy consumption is outside the threshold range corresponding to the first thermal response ratio and the first electric energy consumption is outside the threshold range, it is judged that the contact resistance inside the temperature controller is abnormal; if both are within the threshold range, no abnormality occurs; the comparison method of the second thermal response ratio and the second electric energy consumption and the corresponding threshold range is the same as the above method; and when at least one of the first judgment result and the second judgment result is that the contact resistance is abnormal, an early warning prompt is issued, otherwise the next round of monitoring and judgment is carried out.

[0161] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0162] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A temperature controller contact resistance test early warning method, characterized in that: The steps include: S1, determine whether the contact resistance inside the thermostat is abnormal and obtain the judgment result, including: S11, obtaining a number of internal connection points between internal circuit elements of the temperature controller and forming an internal connection point set; S12, based on the internal connection point set, obtaining two adjacent internal connection points and calculating a first temperature difference, a first current value, and a first voltage value therebetween; S13, in the same time period, calculating a first thermal response ratio according to the first temperature difference and the first current value, and also calculating a first electric energy consumption according to the first current value and the first voltage value; S14, presetting a first thermal response ratio threshold range and a first electric energy consumption threshold range; S15, respectively comparing the first thermal response ratio with the first thermal response ratio threshold range, and the first electric energy consumption with the first electric energy consumption threshold range to obtain a first judgment result; S2, judging whether the contact resistance outside the thermostat is abnormal and obtaining the judgment result, including: S21, acquiring external connection points between the thermostat and the external electrical components and forming an external connection point set; S22, based on the external connection point set, obtaining two adjacent external connection points and calculating a second temperature difference, a second current value, and a second voltage value therebetween; S23, in the same time period, calculating a second thermal response ratio according to the second temperature difference and the second current value, and calculating a second electric energy consumption according to the second current value and the second voltage value; S24, presetting a second thermal response ratio threshold range and a second electric energy consumption threshold range; S25, respectively comparing the second thermal response ratio with the second thermal response ratio threshold range, and the second electric energy consumption with the second electric energy consumption threshold range to obtain a second judgment result; S3, analyzing the first judgment result and the second judgment result, and selecting corresponding operations according to the analysis results, including performing the next round of monitoring and issuing early warning prompts; The first thermal response ratio β is calculated in the same time period, and its formula is expressed as: ； in, Indicates that in the time period ( , ) is the integral of the first temperature difference over time; Indicates that in the time period ( , ) is the integral of the first current value over time; The first electric energy consumption E is calculated in the same time period, and the formula is expressed as: ； in, represents a first current value; Indicates the first voltage value.

2. A temperature controller contact resistance test early warning method according to claim 1, characterized in that: In step S12, two adjacent internal connection points are obtained, including: S121, using a brute force search method to obtain an internal connection point pair with the shortest distance in the internal connection point set; S122, arbitrarily selecting one of the internal connection points as an internal detection origin, and selecting the other internal connection point as an internal detection secondary point; S123, taking the internal detection origin and the internal detection secondary point as two adjacent internal connection points; S124, after calculating the first temperature difference, the first current value, and the first voltage value, updating two adjacent internal connection points; S125, repeating step S124 until all internal connection points in the internal connection point set have been calculated; Among them, if there are multiple internal connection points in the internal connection point set that are connected to the internal detection sub-point and have the shortest distance, one of them is selected.

3. A temperature controller contact resistance test early warning method according to claim 2, characterized in that: In step S124, two adjacent internal connection points are updated, specifically: Taking the internal detection secondary point as an endpoint, obtaining an internal connection point in the internal connection point set that is connected to the internal detection secondary point and has the shortest distance, and using the obtained internal connection point as an updated internal detection secondary point; The original internal detection sub-point is used as the updated internal detection origin, and is combined with the updated internal detection sub-point to form two updated adjacent internal connection points.

4. A temperature controller contact resistance test early warning method according to claim 2, characterized in that: In step S121, the internal connection point pair is obtained by using a brute force search method, including: Traverse all the connection point pairs in the internal connection point set, expressed as: ( , ),i <j; Calculate the inner points of each connection point pair ( , ) and dot ( , ), expressed as: d= ； Compare the currently calculated distance with the known minimum distance. If the currently calculated distance is smaller, update the minimum distance and the corresponding connection point pair. Output the inner connection point pairs with the smallest distance.

5. A temperature controller contact resistance test early warning method according to claim 2, characterized in that: Calculating a first temperature difference, a first current value, and a first voltage value between two adjacent internal connection points includes the following: Using a temperature sensor to detect and obtain a first position temperature at a location where an internal detection origin is located; Using a temperature sensor to detect and obtain a second position temperature at a location where the internal detection sub-point is located; Calculating the first temperature difference according to the first position temperature and the second position temperature; Using a current sensor to detect and obtain a first current value between two adjacent internal connection points; A voltage sensor is used to detect and obtain a first voltage value between two adjacent internal connection points.

6. A temperature controller contact resistance test early warning method according to claim 1, characterized in that: In step S14, the first thermal response ratio threshold range and the first electric energy consumption threshold range are preset, specifically: Data collection: Collect the internal operation data of the thermostat within the historical time period, including the internal historical current value, internal historical voltage value and internal historical temperature difference; Interval division: divide the historical time period into multiple time intervals; Threshold calculation: calculating the internal initial thermal response ratio threshold range within multiple time intervals according to the internal historical current value and the internal historical temperature difference; calculating the internal initial electric energy consumption threshold range within multiple time intervals according to the internal historical current value and the internal historical voltage value; Threshold verification: verifying and adjusting the internal initial thermal response ratio threshold range and the internal initial electric energy consumption threshold range based on the internal operation data to determine a final first thermal response ratio threshold range and a first electric energy consumption threshold range; The historical time period refers to the time range before the current detection time period.

7. A temperature controller contact resistance test early warning method according to claim 1, characterized in that: In step S22, two adjacent external connection points are obtained by using a divide-and-conquer method, including: S221, sorting the external connection point set according to a coordinate rule; S222, dividing the sorted external connection point set into a left half point set and a right half point set; S223, calling the divide-and-conquer algorithm to recursively process the left half point set and the right half point set respectively, to obtain the distances between the left half adjacent point pairs and the distances between the right half adjacent point pairs; S224, selecting the minimum distance between the left half adjacent point pair distances and the right half adjacent point pair distances; S225, respectively obtaining the minimum adjacent point pair corresponding to the minimum distance in the left half point set and the right half point set; S226, merging the minimum adjacent point pairs in the left half point set and the right half point set; S227, expanding a certain range from the middle dividing line between the left half point set and the right half point set to both the left and right sides, and performing pairwise comparisons on the external connection points within the range, and updating the minimum distance and the corresponding minimum adjacent point pair; S228, outputting the minimum distance and taking its corresponding minimum adjacent point pair as two adjacent external connection points; Among them, the left half adjacent point pair represents a point pair consisting of two adjacent connection points in the left half point set; the left half adjacent point pair distance represents the distance between two adjacent connection points in the left half point set; The right half adjacent point pair represents a point pair consisting of two adjacent connected points in the right half point set; the right half adjacent point pair distance represents the distance between two adjacent connected points in the right half point set.

8. The temperature controller contact resistance test early warning method according to claim 1, characterized in that: The second thermal response ratio β' is calculated in the same time period, and its formula is expressed as: ； in, Indicates that in the time period ( , ) is the integral of the second temperature difference over time; Indicates that in the time period ( , ) is the integral of the second current value over time.

9. A temperature controller contact resistance test early warning method according to claim 1, characterized in that: The second electric energy consumption E' is calculated in the same time period, and the formula is expressed as: ； in, represents a second current value; Indicates the second voltage value.

10. A temperature controller contact resistance test early warning method according to claim 1, characterized in that: Select the corresponding operation based on the analysis results, specifically: If the first thermal response ratio exceeds the first thermal response ratio threshold range, and / or the first electric energy consumption exceeds the first electric energy consumption threshold range, the first judgment result is: an abnormality occurs in the contact resistance inside the thermostat, otherwise: no abnormality occurs; If the second thermal response ratio exceeds the second thermal response ratio threshold range, and / or the second electric energy consumption exceeds the second electric energy consumption threshold range, the second judgment result is: an abnormality occurs in the contact resistance outside the thermostat, otherwise: no abnormality occurs; If the first judgment result and / or the second judgment result is: the contact resistance of the temperature controller is abnormal, an early warning prompt is issued, otherwise the next round of monitoring is carried out.

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