Temperature measurement sensor and temperature measurement method in electric appliance cabinet

Abstract

The invention discloses an electric appliance cabinet internal temperature measurement sensor and a temperature measurement method, and relates to the technical field of temperature monitoring. According to the method, before the electric appliance cabinet is used, according to a digital twinborn model in the electric appliance cabinet, an area where electric appliance elements are concentrated, an area where ventilation is poor and an area where heating is easy are screened out; then the arrangement position of each temperature measurement sensor is confirmed, it is ensured that the measured temperature can accurately reflect the internal temperature, the accuracy of temperature collection is guaranteed, reliable data reference is provided for subsequent temperature analysis, the temperature monitoring effect is improved, and then the complexity, sensitivity and stability of the arrangement position of each temperature measurement sensor are analyzed; according to the method, the types of the temperature measurement sensors are determined, the appropriate sensor type is selected for each position, the adaptability of the sensor types and the detection positions is ensured, and the temperature acquisition accuracy is improved while the sensor loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature monitoring, and in particular to a temperature measuring sensor and a temperature measuring method inside an electrical cabinet. Background Art

[0002] Electrical cabinets can be divided into low-voltage distribution cabinets, distribution boxes, control cabinets and switch cabinets according to different uses and installation methods. Various components can be installed inside the electrical cabinet, such as circuit breakers, contactors and controllers. The components in the electrical cabinet will generate heat when working. If the temperature is too high, it may cause equipment performance degradation, shorten life or even damage. Therefore, it is necessary to detect the temperature inside the electrical cabinet. At the same time, the internal structure of the electrical cabinet is complex. Choosing a suitable temperature sensor can improve the temperature monitoring effect.

[0003] Prior art, such as a high-voltage switch cabinet and a temperature detection method disclosed in the application with publication number CN116953389A, relates to the technical field of power systems. The high-voltage switch cabinet includes a circuit breaker, a current transformer, a temperature sensor, a wireless transmission module, a wireless receiving module and a display screen; the current transformer and the temperature sensor are both arranged on the circuit breaker; the current transformer is electrically connected to the temperature sensor and the wireless transmission module respectively; the wireless transmission module is in communication connection with the wireless receiving module, and the wireless receiving module is electrically connected to the display screen; the current transformer is used to sense the current passing through the circuit breaker when the circuit breaker is turned on to generate electric energy to power the temperature sensor and the wireless transmission module; after the temperature sensor is powered on, it is used to collect the temperature of the circuit breaker and transmit the collected temperature of the circuit breaker to the wireless transmission module; after the wireless transmission module is powered on, it is used to transmit the temperature of the circuit breaker to the display screen for display, which reduces safety hazards and does not require battery replacement.

[0004] Prior art, such as a low-voltage cabinet wired temperature detection system and method disclosed in the application with publication number CN112903124B. The detection system includes one or more temperature measurement terminals and a display main control unit; the temperature measurement terminal is used to measure the temperature of the end to be measured; the display main control unit is used to receive data from multiple temperature measurement terminals, and display it after processing; the temperature measurement terminal and the display main control unit are connected through a bus to exchange information. Through the present invention, it is possible to realize real-time temperature detection without using a battery to power the detection system.

[0005] The above technologies have at least the following deficiencies: 1. The temperature sensor should be installed in the key position of the electrical cabinet that can accurately reflect the internal temperature. For example, the area where electrical components are concentrated, the area with poor ventilation and the area prone to heat. However, the above two solutions do not analyze the layout of the temperature sensor, and cannot ensure that the measured temperature can accurately reflect the internal temperature, which reduces the accuracy of temperature collection, cannot provide reliable data reference for subsequent temperature analysis, and reduces the effect of temperature monitoring.

[0006] 2. Different types of temperature sensors have different characteristics. Placing suitable temperature sensor types at different locations in the electrical cabinet can improve the reliability of temperature acquisition and reduce sensor loss. However, the above two solutions lack analysis on the selection of temperature sensor types at different locations in the electrical cabinet, thus failing to ensure the compatibility of sensor types and detection positions, reducing the accuracy of temperature acquisition while increasing sensor loss. Summary of the invention

[0007] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide a temperature measurement sensor and a temperature measurement method inside an electrical cabinet.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a temperature measurement sensor and a temperature measurement method inside an electrical cabinet, comprising the following steps: S1, constructing a digital twin model inside the electrical cabinet, obtaining the positions of each component inside the electrical cabinet, and obtaining the electrical cabinet equipment specification.

[0009] S2. Use the position of each component and the specifications of the electrical cabinet to confirm the location of each temperature sensor.

[0010] S3. Use the digital twin model inside the electrical cabinet to confirm the sensor type of each temperature sensor layout location.

[0011] S4. Install corresponding sensor types at each temperature sensor layout location, collect the temperature of each temperature sensor layout location in each time period, and analyze the temperature status of each temperature sensor layout location in each time period.

[0012] S5. Mark the digital twin model inside the electrical cabinet and issue an early warning prompt.

[0013] The beneficial effects of the present invention are as follows: the present invention provides a temperature measuring sensor and a temperature measuring method for an electrical cabinet. Before the electrical cabinet is used, the areas where electrical components are concentrated, areas with poor ventilation, and areas prone to heat are screened out according to the digital twin model of the interior of the electrical cabinet. Then, the layout positions of each temperature sensor are confirmed to ensure that the measured temperature can accurately reflect the internal temperature, ensure the accuracy of temperature acquisition, provide reliable data reference for subsequent temperature analysis, improve the effect of temperature monitoring, and then analyze the complexity, sensitivity, and stability of the sensors at each temperature sensor layout position, confirm the type of sensors at each temperature sensor layout position, select a suitable sensor type for each position, ensure the adaptability of the sensor type and the detection position, improve the accuracy of temperature acquisition, and reduce the loss of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The present invention is a schematic flow chart of the steps for implementing the method. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 As shown, a temperature measuring sensor and a temperature measuring method inside an electrical cabinet include the following steps:

[0018] S1. Build a digital twin model of the interior of the electrical cabinet, obtain the location of each component inside the electrical cabinet, and obtain the equipment specifications of the electrical cabinet.

[0019] It should be noted that a camera is used to capture panoramic images of the electrical cabinet, and then a digital twin model of the interior of the electrical cabinet is constructed using three-dimensional modeling technology.

[0020] The components inside the electrical cabinet include circuit breakers, contactors, and controllers. The electrical cabinet equipment specification is provided by the electrical cabinet merchant. The electrical cabinet equipment specification includes the operating temperature range, maximum abnormal temperature, temperature sensitivity of each component, and environmental data of each test point in each test environment. Before the electrical cabinet leaves the factory, the merchant needs to test the electrical cabinet and record the relevant test data in the electrical cabinet equipment specification.

[0021] For example: the electrical cabinet operates under a specified environment, and the temperature of each component during the test is detected. Then the tester confirms the operating temperature range and the highest abnormal temperature of each component based on the temperature of each component during the test. The specified environment includes an ambient temperature of 20°C and an ambient humidity of 40% RH, etc., °C represents degrees Celsius, and RH represents relative humidity.

[0022] The electrical cabinet is operated in each test environment, and several test points are set in the electrical cabinet, and then the environmental data of each test point in each test environment are collected, wherein the environmental data includes temperature and humidity, etc. The ambient temperature and ambient humidity in the specified environment are set according to the preset temperature difference and humidity difference in each test environment. For example, if the preset temperature difference and humidity difference are 2°C and 5%RH respectively, the ambient temperature and ambient humidity of the first test environment can be 18°C ​​and 35%RH respectively, and the ambient temperature and ambient humidity of the second test environment can be 22°C and 45%RH respectively.

[0023] The temperature sensitivity of each component indicates the degree of influence of temperature on the operation of each component. The electrical cabinet is operated in each test environment and the specified environment, and the operating data of each component in each test environment and the specified environment are monitored, where the operating data include voltage and current, etc. Then, the operating data of each component in each test environment is subtracted from the operating data in the specified environment, and then divided by the operating data in the specified environment, and then the average is calculated to obtain the temperature sensitivity of each component.

[0024] S2. Use the position of each component and the specifications of the electrical cabinet to confirm the location of each temperature sensor.

[0025] In a specific embodiment, the specific process of confirming the layout position of each temperature sensor is as follows: taking the position of each component as the center, draw a circle with a preset length, the area inside the circle is the temperature dispersion area of ​​each component, and use the set color to fill the temperature dispersion area of ​​each component in the digital twin model inside the electrical cabinet, and then obtain each chromaticity area from the digital twin model inside the electrical cabinet.

[0026] It should be noted that the color setting is selected by the staff.

[0027] The larger the chroma, the lighter the color. The smaller the number, the higher the melanin content and the darker the color. The larger the number, the less melanin content and the lighter the color. When multiple areas overlap, the chroma of the overlapping area will decrease, which means that there are more components around the area. Placing the temperature sensor in this area can reflect the actual temperature status of the surrounding components and improve the temperature detection effect.

[0028] The chromaticity of each chromaticity area is extracted and compared with a preset chromaticity threshold, and the center position of each chromaticity area whose chromaticity is less than the chromaticity threshold is used as the layout position of each temperature measurement sensor.

[0029] Among them, the setting process of the chromaticity threshold: the chromaticity threshold is a reference value used to judge whether the chromaticity is large, which is set by the staff. For example, the chromaticity threshold is 5, and the chromaticity of a chromaticity area is 4, 4<5, then the chromaticity of the chromaticity area is small, and the temperature sensor should be arranged at the center of the chromaticity area.

[0030] Each chromaticity region whose chromaticity is greater than or equal to the chromaticity threshold is recorded as each marked region. If the temperature dispersion region of a certain element coincides with a certain marked region, the element is taken as the associated element of each marked region, so as to count the associated elements of each marked region.

[0031] The operating temperature range and maximum abnormal temperature of each component are obtained from the specification sheet of the electrical cabinet equipment, and the temperature analysis results of each marked area are analyzed accordingly. The temperature analysis results contain values ​​of 1 and 0. When the temperature analysis result of a marked area is 1, it indicates that the temperature of the marked area is important, otherwise it indicates that the temperature of the marked area is not important. The center position of each marked area with a temperature analysis result of 1 is used as the layout position of each temperature sensor.

[0032] In a specific embodiment, the temperature analysis results of each marked area are analyzed as follows: the operating temperature range and the highest abnormal temperature of each associated element in each marked area are extracted, the maximum temperature and the minimum temperature are selected from the operating temperature range and the highest abnormal temperature as the maximum temperature and the minimum temperature of each associated element, the maximum temperature is subtracted from the minimum temperature to obtain the maximum temperature difference of each associated element, the maximum temperature difference of each associated element is compared with a preset temperature difference threshold, and each associated element whose maximum temperature difference is greater than the temperature difference threshold is recorded as each target element, thereby counting the number of target elements in each marked area, recorded as N y , where y represents the number of each marked area, b is a positive integer, and the distance between the position of each target element in each marked area and the center position is obtained as the temperature detection distance of each target element in each marked area, recorded as L yf , where f represents the number of each target element and f is a positive integer.

[0033] Temperature analysis model expression: In the formula, α y represents the temperature analysis result of the yth marked area, e represents the natural constant, N represents the preset threshold of the number of target elements in the area, g represents the number of target elements, L ymax Indicates the maximum distance from the center of the y-th marked area to the edge of the area. Detects important evaluation factors for component temperature in the preset zone.

[0034] It should be noted that the setting process of the preset temperature difference threshold and the preset regional target element quantity threshold is the same as the chromaticity threshold, which will not be described in detail here.

[0035] The preset regional component temperature detection importance evaluation coefficient is the critical value for judging whether the regional temperature has a significant impact on the operation of the electrical cabinet. When the value is greater than the preset regional component temperature detection importance evaluation coefficient, it means that the temperature in the area has a greater impact on the operation of the electrical cabinet, and the temperature in the area is more important. On the contrary, it means that the temperature in the area has a smaller impact on the operation of the electrical cabinet, and the temperature in the area is less important. For example, the preset regional component temperature detection importance evaluation coefficient is 10. The value is 12, 12>10. The temperature of the y-th marked area has a greater impact on the operation of the electrical cabinet, and the temperature within the area is more important.

[0036] The more target elements there are in the area, the greater the difference in temperature change in the area. When the temperature is high, it will affect the temperature inside the electrical cabinet, thereby affecting the overall operation of the electrical cabinet. Therefore, it is necessary to accurately detect the temperature of the area, grasp and identify the temperature changes in the area, ensure that abnormalities can be discovered in time when the temperature changes abnormally, and improve the efficiency of monitoring.

[0037] The test data of the electrical cabinet is obtained from the equipment specification of the electrical cabinet, and the ventilation analysis results of each marked area are analyzed. The ventilation analysis results contain values ​​of 1 and 0. When the ventilation analysis result of a marked area is 1, it indicates that the ventilation of the marked area is good, otherwise it indicates that the ventilation of the marked area is poor. The center position of each marked area with a ventilation analysis result of 0 is used as the layout position of each temperature sensor.

[0038] In the above, the ventilation analysis results of each marked area are analyzed, and the specific analysis process is as follows: the environmental data of each test point in the electrical cabinet in each test environment is obtained from the test data of the electrical cabinet, and each test point is compared with each marked area. If a test point is in a marked area, then the test point is used as the test point in the marked area, so as to obtain each test point in each marked area.

[0039] Extract the environmental data of each test point in each marked area in each test environment, denoted as H ycr, where c represents the number of each test point, r represents the number of each test environment, and both c and r are positive integers; at the same time, the environmental data threshold is obtained from the test data of the electrical cabinet, which is recorded as H.

[0040] The ventilation analysis model expression is: In the formula, β y represents the ventilation analysis result of the y-th marked area, z represents the number of test points, q represents the number of test environments, ΔH is the preset environmental data difference threshold, and φ is the preset environmental safety assessment coefficient.

[0041] It should be noted that the setting process of the preset environmental data difference threshold and the chromaticity threshold is the same, which will not be repeated here.

[0042] The preset environmental safety assessment coefficient is a critical value for judging whether the ventilation in the area is good. The specific setting process is the same as the setting process of the preset regional component temperature detection important assessment coefficient, which will not be repeated here.

[0043] When the ventilation in an area is poor, the temperature, humidity and other data in the area cannot remain normal, which will affect the components in the electrical cabinet and affect the operation of the electrical cabinet. Therefore, a temperature sensor is installed in the poorly ventilated area to promptly respond to the temperature conditions in the poorly ventilated area. When the temperature is abnormal, timely measures can be taken to ensure the normal temperature in the electrical cabinet.

[0044] S3. Use the digital twin model inside the electrical cabinet to confirm the sensor type of each temperature sensor layout location.

[0045] In a specific embodiment, the sensor type of each temperature sensor layout location is confirmed, and the specific process is as follows: based on the digital twin model inside the electrical cabinet, a sphere is made with the layout location of each temperature sensor as the center and a preset length as the radius. The range inside the sphere is the temperature measurement range of each temperature sensor layout location. The temperature measurement range layout of each temperature sensor layout location is obtained from the digital twin model inside the electrical cabinet, and the complexity of the sensor at each temperature sensor layout location is analyzed. The complexity includes values ​​of 1 and 0. When the value is 1, it indicates that the location is complex and requires the installation of high-quality sensors. Otherwise, it indicates that the location is not complex and does not require the installation of high-quality sensors.

[0046] Preferably, the analysis process of the complexity of the sensors at the respective temperature sensor layout positions is as follows: the position and density of each component are obtained from the temperature measurement range layout of each temperature sensor layout position, the distance between each adjacent component is obtained by using the position of each component, and then the average spacing of the components within the temperature measurement range of each temperature sensor layout position is obtained by mean calculation, which is recorded as L k, k represents the number of each temperature sensor layout position, k is a positive integer; at the same time, the component density within the temperature measurement range of each temperature sensor layout position is recorded as ρ k .

[0047] The temperature measurement range of each temperature sensor layout position is layered according to the preset height to obtain each layer. If a component coincides with at least two layers at the same time, the component is recorded as a type of component. The number of components of a type in the temperature measurement range of each temperature sensor layout position is counted and recorded as N. k .

[0048] The expression of complexity analysis formula is:

[0049] In the formula, δ1 k represents the complexity of the kth temperature sensor layout position sensor, L, ρ, and N are the preset component spacing threshold, component density threshold, and the number threshold of a type of components, respectively. η1, η2, and η3 are the preset proportional coefficients of component spacing, component density, and the proportional coefficient of the number of a type of components, respectively.

[0050] It should be noted that the setting process of the preset element spacing threshold and the chromaticity threshold is the same, which will not be repeated here. η1, η2, and η3 are discussed and set by multiple professionals based on historical experience, for example: η1 is 0.3, η2 is 0.3, and η3 is 0.4.

[0051] Obtain the number of components in the temperature measurement range corresponding to each temperature sensor layout position, and obtain the temperature sensitivity of each component in the temperature measurement range corresponding to each temperature sensor layout position from the electrical cabinet equipment specification sheet, thereby calculating the sensitivity of the sensor at each temperature sensor layout position. The sensitivity includes values ​​of 1 and 0. When the value is 1, it indicates that the sensor requires high sensitivity, otherwise it indicates that the sensor does not require high sensitivity.

[0052] Preferably, the analysis process of the sensitivity of the sensors at the respective temperature sensor placement positions is as follows: the number of elements corresponding to the temperature measurement range at the respective temperature sensor placement positions is recorded as N1 k The temperature sensitivity of each component in the temperature measurement range corresponding to the location of each temperature sensor is recorded as LM kj , j represents the number of each component, and j is a positive integer.

[0053] The expression of sensitivity analysis formula is:

[0054] In the formula, δ2 krepresents the sensitivity of the sensor at the kth temperature sensor layout position, N′ and LM are the preset component quantity threshold and temperature sensitivity threshold, respectively, γ1 and γ2 represent the preset component quantity proportionality coefficient and temperature sensitivity proportionality coefficient, respectively.

[0055] It should be noted that the setting process of the preset element quantity threshold, temperature sensitivity threshold and chromaticity threshold is the same, which will not be repeated here. The setting process of γ1, γ2 is the same as η1, η2, η3, which will not be repeated here.

[0056] Obtain the operating temperature range and maximum abnormal temperature of each component in the temperature measurement range corresponding to each temperature sensor layout position, and analyze the stability of the sensor at each temperature sensor layout position. The stability includes values ​​of 1 and 0. When the value is 1, it indicates that the sensor stability requirement is high, otherwise it indicates that the sensor stability requirement is low.

[0057] In a specific embodiment, the stability analysis process of the sensors at each temperature sensor layout position is as follows: the maximum operating temperature and the minimum operating temperature of each component are obtained from the operating temperature range and the highest abnormal temperature of each component in the temperature measurement range corresponding to each temperature sensor layout position, and the maximum operating temperature, the minimum operating temperature and the highest abnormal temperature of each component are sorted in descending order to obtain the reference temperatures of the temperature measurement range corresponding to each temperature sensor layout position, and the difference of each reference temperature is calculated to obtain the reference temperature difference, which is recorded as T ki , where i represents the number of each reference temperature difference and i is a positive integer.

[0058] The stability analysis formula is: In the formula, δ3 k represents the stability of the sensor at the kth temperature sensor layout position, p represents the number of reference temperature differences, and T is the preset temperature difference threshold.

[0059] It should be noted that the setting process of the preset temperature difference threshold and the chromaticity threshold is the same, which will not be repeated here.

[0060] The complexity, sensitivity and stability corresponding to each sensor type are obtained from the database, the complexity, sensitivity and stability of the sensors at each temperature sensor layout location are compared with the complexity, sensitivity and stability corresponding to each sensor type, and the sensor type with the same complexity, sensitivity and stability as each temperature sensor layout location is selected as the sensor type for each temperature sensor layout location.

[0061] The database stores the complexity, sensitivity and stability corresponding to each sensor type. The complexity, sensitivity and stability corresponding to each sensor type are provided by the merchants of each sensor type, and the complexity, sensitivity and stability corresponding to each sensor type include values ​​of 1 and 0. When the complexity, sensitivity and stability are 1, it indicates that the complexity is large, the sensitivity is good and the stability is good. When the complexity, sensitivity and stability are 0, it indicates that the complexity is small, the sensitivity is poor and the stability is poor.

[0062] Each sensor type includes a thermocouple sensor, a thermal resistor sensor or an infrared sensor, wherein each sensor is a temperature measuring sensor.

[0063] S4, installing corresponding sensor types at each temperature sensor layout position, collecting the temperature of each temperature sensor layout position in each time period, and analyzing the temperature state of each temperature sensor layout position in each time period;

[0064] The analysis of the temperature state of each temperature sensor arrangement position in each time period is specifically performed as follows: the temperature of each temperature sensor arrangement position in each time period is compared with a preset temperature threshold value. When the temperature of a temperature sensor arrangement position in a certain time period is greater than the preset temperature threshold value, it indicates that the temperature state of the temperature sensor arrangement position in the time period is in a normal state, otherwise it is in an abnormal state;

[0065] It should be noted that the preset temperature threshold is set by the electrical cabinet merchant and is the upper temperature limit of the entire electrical cabinet.

[0066] When the temperature state of a certain temperature sensor layout position in a certain time period is in an abnormal state, obtain the components running in the time period within the temperature measurement range corresponding to the temperature sensor layout position, record them as operating components, extract the maximum operating temperature of each operating component, and take the components whose maximum operating temperature is lower than the temperature as marked components, so as to analyze the temperature state of each temperature sensor layout position in each time period, and obtain the marked components in each time period within the temperature measurement range corresponding to each temperature sensor layout position when the temperature state is in an abnormal state.

[0067] S5. Mark the digital twin model inside the electrical cabinet and issue an early warning prompt.

[0068] Preferably, the marking is performed in the digital twin model inside the electrical cabinet, and the specific process is as follows: when a temperature sensor layout position is in an abnormal state in a certain time period, the temperature sensor layout position is marked with a preset color in the digital twin model inside the electrical cabinet, and the temperature of the temperature sensor layout position in the time period is displayed at the same time, and each marked element in the time period is marked, so as to perform marking in the digital twin model inside the electrical cabinet.

[0069] Before the electrical cabinet is used, the embodiment of the present invention screens out areas where electrical components are concentrated, areas with poor ventilation, and areas prone to heat according to the digital twin model inside the electrical cabinet, and then confirms the layout positions of each temperature sensor to ensure that the measured temperature can accurately reflect the internal temperature, ensure the accuracy of temperature acquisition, provide reliable data reference for subsequent temperature analysis, and improve the effect of temperature monitoring. The complexity, sensitivity, and stability of the sensors at each temperature sensor layout position are analyzed, and the type of sensor at each temperature sensor layout position is confirmed. For each position, a suitable sensor type is selected to ensure the adaptability of the sensor type and the detection position, thereby improving the accuracy of temperature acquisition and reducing sensor loss.

[0070] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they shall all fall within the protection scope of the present invention.

Claims

1. A temperature measuring sensor and temperature measuring method inside an electrical cabinet, characterized in that: The steps include: S1. Build a digital twin model of the interior of the electrical cabinet, obtain the location of each component inside the electrical cabinet, and obtain the equipment specifications of the electrical cabinet; S2. Use the position of each component and the specifications of the electrical cabinet to confirm the location of each temperature sensor; S3. Use the digital twin model inside the electrical cabinet to confirm the sensor type of each temperature sensor layout location; S4, installing corresponding sensor types at each temperature sensor layout position, collecting the temperature of each temperature sensor layout position in each time period, and analyzing the temperature state of each temperature sensor layout position in each time period; S5. Mark the digital twin model inside the electrical cabinet and issue an early warning prompt.

2. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 1, characterized in that: The specific process of confirming the layout positions of each temperature sensor is as follows: With the position of each component as the center, a circle with a preset length is drawn. The area inside the circle is the temperature dispersion area of ​​each component. The temperature dispersion area of ​​each component is filled with a set color in the digital twin model inside the electrical cabinet, and each chromaticity area is obtained from the digital twin model inside the electrical cabinet. Extract the chromaticity of each chromaticity area and compare it with the preset chromaticity threshold, and use the center position of each chromaticity area whose chromaticity is less than the chromaticity threshold as the layout position of each temperature measurement sensor; Each chromaticity region whose chromaticity is greater than or equal to the chromaticity threshold is recorded as each marked region. If the temperature dispersion region of a certain element coincides with a certain marked region, the element is regarded as the associated element of each marked region, so as to count the associated elements of each marked region; Obtain the operating temperature range and the highest abnormal temperature of each component from the specification of the electrical cabinet equipment, and analyze the temperature analysis results of each marked area. The temperature analysis results contain values ​​of 1 and 0. When the temperature analysis result of a marked area is 1, it indicates that the temperature of the marked area is important, otherwise it indicates that the temperature of the marked area is not important. The center position of each marked area with a temperature analysis result of 1 is used as the layout position of each temperature sensor; The test data of the electrical cabinet is obtained from the equipment specification of the electrical cabinet, and the ventilation analysis results of each marked area are analyzed. The ventilation analysis results contain values ​​of 1 and 0. When the ventilation analysis result of a marked area is 1, it indicates that the ventilation of the marked area is good, otherwise it indicates that the ventilation of the marked area is poor. The center position of each marked area with a ventilation analysis result of 0 is used as the layout position of each temperature sensor.

3. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 2, characterized in that: The temperature analysis results of each marked area are analyzed as follows: Extract the operating temperature range and the highest abnormal temperature of each associated element in each marked area, select the maximum temperature and the minimum temperature from the operating temperature range and the highest abnormal temperature as the maximum temperature and the minimum temperature of each associated element, subtract the minimum temperature from the maximum temperature to obtain the maximum temperature difference of each associated element, compare the maximum temperature difference of each associated element with the preset temperature difference threshold, and record each associated element whose maximum temperature difference is greater than the temperature difference threshold as each target element, so as to count the number of target elements in each marked area, recorded as N y , where y represents the number of each marked area, b is a positive integer, and the distance between the position of each target element in each marked area and the center position is obtained as the temperature detection distance of each target element in each marked area, recorded as L yf , where f represents the number of each target element, and f is a positive integer; Temperature analysis model expression: In the formula, α y represents the temperature analysis result of the yth marked area, e represents the natural constant, N represents the preset threshold of the number of target elements in the area, g represents the number of target elements, L ymax Indicates the maximum distance from the center of the y-th marked area to the edge of the area. Detects important evaluation factors for component temperature in the preset zone.

4. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 3, characterized in that: The ventilation analysis results of each marked area are analyzed, and the specific analysis process is as follows: Obtaining environmental data of each test point in the electrical cabinet in each test environment from the test data of the electrical cabinet, comparing each test point with each marked area, and if a test point is in a marked area, taking the test point as the test point in the marked area, thereby obtaining each test point in each marked area; Extract the environmental data of each test point in each marked area in each test environment, denoted as H ycr , where c represents the number of each test point, r represents the number of each test environment, and both c and r are positive integers; at the same time, the environmental data threshold is obtained from the test data of the electrical cabinet, which is recorded as H; The ventilation analysis model expression is: In the formula, β y represents the ventilation analysis result of the y-th marked area, z represents the number of test points, q represents the number of test environments, ΔH is the preset environmental data difference threshold, and φ is the preset environmental safety assessment coefficient.

5. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 1, characterized in that: The specific process of confirming the sensor type of each temperature sensor layout position is as follows: Based on the digital twin model inside the electrical cabinet, a sphere is made with the location of each temperature sensor as the center and the preset length as the radius. The range inside the sphere is the temperature measurement range of each temperature sensor location. The temperature measurement range layout of each temperature sensor location is obtained from the digital twin model inside the electrical cabinet, and the complexity of the sensors at each temperature sensor location is analyzed. The complexity includes values ​​of 1 and 0. When the value is 1, it indicates that the location is complex and requires the installation of high-quality sensors. Otherwise, it indicates that the location is not complex and does not require the installation of high-quality sensors. Obtain the number of components in the temperature measurement range corresponding to each temperature sensor layout position, and at the same time obtain the temperature sensitivity of each component in the temperature measurement range corresponding to each temperature sensor layout position from the electrical cabinet equipment specification, thereby calculating the sensitivity of the sensor at each temperature sensor layout position. The sensitivity includes values ​​of 1 and 0. When the value is 1, it indicates that the sensor requires high sensitivity, otherwise it indicates that the sensor does not require high sensitivity; Obtain the operating temperature range and the highest abnormal temperature of each component in the temperature measurement range corresponding to each temperature sensor layout position, and analyze the stability of the sensor at each temperature sensor layout position. The stability includes the values ​​of 1 and 0. When the value is 1, it indicates that the sensor stability requirement is high, otherwise it indicates that the sensor stability requirement is low; The complexity, sensitivity and stability corresponding to each sensor type are obtained from the database, the complexity, sensitivity and stability of the sensors at each temperature sensor layout location are compared with the complexity, sensitivity and stability corresponding to each sensor type, and the sensor type with the same complexity, sensitivity and stability as each temperature sensor layout location is selected as the sensor type for each temperature sensor layout location.

6. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 5, characterized in that: The analysis process of the complexity of the placement of the temperature sensors is as follows: The position and density of each component are obtained from the temperature measurement range layout of each temperature sensor layout position. The distance between adjacent components is obtained using the position of each component. Then, the average spacing of components within the temperature measurement range of each temperature sensor layout position is obtained by mean calculation, which is recorded as L. k , k represents the number of each temperature sensor layout position, k is a positive integer; at the same time, the component density within the temperature measurement range of each temperature sensor layout position is recorded as ρ k ; The temperature measurement range of each temperature sensor layout position is layered according to the preset height to obtain each layer. If a component coincides with at least two layers at the same time, the component is recorded as a type of component. The number of components of a type in the temperature measurement range of each temperature sensor layout position is counted and recorded as N. k ; The expression of complexity analysis formula is: In the formula, δ1 k represents the complexity of the kth temperature sensor layout position sensor, L, ρ, and N are the preset component spacing threshold, component density threshold, and the number threshold of a type of components, respectively. η1, η2, and η3 are the preset proportional coefficients of component spacing, component density, and the proportional coefficient of the number of a type of components, respectively.

7. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 5, characterized in that: The analysis process of the sensitivity of the temperature sensor layout position sensors is as follows: The number of components corresponding to the temperature measurement range of each temperature sensor layout position is recorded as N1 k The temperature sensitivity of each component in the temperature measurement range corresponding to the location of each temperature sensor is recorded as LM kj , j represents the number of each component, j is a positive integer; The expression of sensitivity analysis formula is: In the formula, δ2 k represents the sensitivity of the sensor at the kth temperature sensor layout position, N′ and LM are the preset component quantity threshold and temperature sensitivity threshold, respectively, γ1 and γ2 represent the preset component quantity proportionality coefficient and temperature sensitivity proportionality coefficient, respectively.

8. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 5, characterized in that: The analysis process of the stability of the temperature sensor arrangement position sensors is as follows: The maximum operating temperature and the minimum operating temperature of each component are obtained from the operating temperature range and the highest abnormal temperature of each component in the temperature measurement range corresponding to each temperature measurement sensor layout position. The maximum operating temperature, the minimum operating temperature and the highest abnormal temperature of each component are sorted in descending order to obtain each reference temperature of the temperature measurement range corresponding to each temperature measurement sensor layout position. The difference of each reference temperature is calculated to obtain each reference temperature difference, which is recorded as T ki , where i represents the number of each reference temperature difference, and i is a positive integer; The stability analysis formula is: In the formula, δ3 k represents the stability of the sensor at the kth temperature sensor layout position, p represents the number of reference temperature differences, and T is the preset temperature difference threshold.

9. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 8, characterized in that: The specific analysis process of analyzing the temperature status of each temperature sensor layout position in each time period is as follows: The temperature of each temperature sensor location in each time period is compared with the preset temperature threshold. When the temperature of a temperature sensor location in a certain time period is greater than the preset temperature threshold, it indicates that the temperature state of the temperature sensor location in the time period is in a normal state, otherwise it is in an abnormal state. When the temperature state of a certain temperature sensor layout position in a certain time period is in an abnormal state, obtain the components running in the time period within the temperature measurement range corresponding to the temperature sensor layout position, record them as operating components, extract the maximum operating temperature of each operating component, and take the components whose maximum operating temperature is lower than the temperature as marked components, so as to analyze the temperature state of each temperature sensor layout position in each time period, and obtain the marked components in each time period within the temperature measurement range corresponding to each temperature sensor layout position when the temperature state is in an abnormal state.

10. The temperature measuring sensor and temperature measuring method inside an electrical cabinet according to claim 9, characterized in that: The specific process of marking in the digital twin model inside the electrical cabinet is as follows: When a temperature sensor location is in an abnormal state during a certain period of time, the temperature sensor location is marked with a preset color in the digital twin model inside the electrical cabinet, and the temperature of the temperature sensor location during the period is displayed. The marked elements in the period are also marked, so as to be marked in the digital twin model inside the electrical cabinet.

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