Heating detection method and device
By constructing a heating detection circuit and using an abnormal event type identification model to analyze the sampling operating current, the problems of inaccurate heating film detection and insufficient safety in the existing technology are solved, and accurate and low-cost heating detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 联想长风科技(北京)有限公司
- Filing Date
- 2026-03-26
- Publication Date
- 2026-05-08
AI Technical Summary
The existing detection and protection procedures for the working status of heating films in electronic products suffer from inaccurate detection results, high implementation costs, and insufficient operational safety.
A heating detection circuit is constructed, including a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indicator unit. The microcontroller controls the switch unit to conduct the heating circuit, the current sampling unit collects the operating current, and the results are analyzed through a heating abnormal event type identification model. The status indicator unit displays the detection results.
This approach ensures accurate heating detection results and operational safety while reducing implementation costs.
Smart Images
Figure CN121995149A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic circuit protection, and in particular to a heating detection method and apparatus. Background Technology
[0002] Low-temperature stability is a key performance characteristic for ensuring the reliable operation of electronic products in harsh outdoor environments, directly determining the startup and operational reliability of equipment under extreme conditions. The industry typically uses heating films to actively heat electronic components operating in low-temperature environments, maintaining them within a suitable operating temperature range. Current methods for testing the function of heating films mostly rely on manual touch judgment or observation with dedicated imaging equipment, which are easily constrained by subjective factors, equipment costs, and operational safety.
[0003] At present, the detection and protection of the working status of heating films for electronic products suffers from technical problems such as inaccurate detection results, high implementation costs, and insufficient operational safety. Summary of the Invention
[0004] This application provides a heating detection method and apparatus. It employs a heating detection circuit composed of a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indicator unit. The switch control unit, current sampling unit, and heating load are connected in series with a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indicator unit. The microcontroller controls the switch control unit to conduct the heating loop. The current sampling unit collects the sampling current of the heating loop. A heating anomaly event type identification model is used to analyze and judge the sampling current. Based on the identification results, the status indicator unit is controlled to output the corresponding heating detection result. These technical means solve the technical problems of inaccurate detection results, high implementation costs, and insufficient operational safety in existing electronic product heating film working status detection and protection processes. This achieves the technical effects of accurate detection results, low implementation costs, and safe operation.
[0005] This application provides a heating detection method, comprising: constructing a heating detection circuit, the heating detection circuit including a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit, wherein the switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop; the microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit; when the microcontroller controls the switch control unit to conduct on the surface of the heated device, the sampling operating current of the heating loop is obtained through the current sampling unit; the sampling operating current is analyzed according to a heating abnormal event type identification model, and the status indication unit is controlled to display the heating detection result according to the heating abnormal event identification result.
[0006] In a possible implementation, the following process is performed: the current sampling unit includes a sampling resistor connected in series with the switch control unit; the current sampling unit obtains the sampling operating current of the heating circuit by acquiring the voltage across the sampling resistor.
[0007] In a possible implementation, the following processing is performed: Based on the heating anomaly event identification result, the status indicator unit is controlled to display the heating detection result, the status indicator unit including a dual-color light-emitting diode; the heating anomaly event identification result is parsed, the microcontroller including controlling the dual-color light-emitting diode of the status indicator unit to indicate heating function anomalies corresponding to different heating anomaly event types with a first color and different flashing frequencies, while the microcontroller controls the switch control unit to turn off; and the microcontroller controls the dual-color light-emitting diode of the status indicator unit to indicate normal heating function with a second color.
[0008] In a possible implementation, the following process is performed: the switch control unit includes a MOS transistor, the drain and source of which are connected in series to the heating circuit, and the gate of which is connected to the microcontroller.
[0009] In a possible implementation, the following processes are performed: establishing a communication connection between the microcontroller and the host computer software; recording switch control record data, sampling current record data, and status indication record data corresponding to the switch control unit, the current sampling unit, and the status indication unit; and uploading the switch control record data, sampling current record data, and status indication record data to the host computer software for storage.
[0010] In a possible implementation, the following processing is performed: The method for training the heating anomaly event type identification model involves analyzing the sampled operating current based on the heating anomaly event type identification model. This includes: collecting historical heating anomaly event samples of the heated device, sampled current data samples corresponding to each heating anomaly event, and label information identifying known heating anomaly event types; extracting current change feature vector samples from the sampled current data samples; iteratively predicting the initial heating anomaly event type identification model based on the current change feature vector samples; establishing prediction loss data for predicting heating anomaly event types and label information of known heating anomaly event types; and optimizing the initial heating anomaly event type identification model according to the prediction loss data to obtain the trained heating anomaly event type identification model.
[0011] In a possible implementation, the sampled operating current is analyzed based on the heating anomaly event type identification model, and the following processing is performed: the trained heating anomaly event type identification model is downloaded to the current sampling unit, and the current change feature vector of the current sampling unit is extracted, wherein the current change feature vector includes the current rise slope, the current steady-state value, the current ripple amplitude, and the average current value within a specific time window; the obtained current change feature vector is input into the heating anomaly event type identification model for identification to obtain the heating anomaly event type; and the status indicator unit is controlled to display the heating detection result according to the heating anomaly event type.
[0012] In a possible implementation, the following processing is performed: the heating abnormality event type includes at least one or more of the following: heating film open circuit, heating film short circuit, heating film aging, excessive contact resistance at heating film connection point, and power supply abnormality.
[0013] This application also provides a heating detection device, comprising: a heating detection circuit construction module for constructing a heating detection circuit, the heating detection circuit including a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit, wherein the switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop, and the microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit; a working current sampling module for obtaining the sampling working current of the heating loop through the current sampling unit when the microcontroller controls the switch control unit to conduct on the surface of the heated device; and a heating detection result display module for analyzing the sampling working current according to a heating abnormal event type identification model, and controlling the status indication unit to display the heating detection result according to the heating abnormal event identification result.
[0014] The proposed heating detection method and apparatus first construct a heating detection circuit, which includes a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit. The switch control unit, current sampling unit, and heating load are connected in series with a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit. Then, when the microcontroller controls the switch control unit to conduct on the surface of the heated device, the current sampling unit acquires the sampling current of the heating loop. Finally, the sampling current is analyzed according to a heating anomaly event type identification model, and the status indication unit is controlled to display the heating detection result based on the heating anomaly event identification result. Through the above process, the proposed method and apparatus achieve the technical effects of accurate detection results, low implementation cost, and safe operation. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Flowcharts are used in this application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed precisely in sequence. Instead, various steps can be processed in reverse order or simultaneously as needed. Furthermore, other operations can be added to these processes, or one or more steps can be removed from these processes.
[0016] Figure 1 This is a schematic flowchart of a heating detection method provided in an embodiment of this application.
[0017] Figure 2 This is a schematic diagram illustrating the working principle of a heating detection method provided in an embodiment of this application.
[0018] Figure 3 This is a schematic diagram of a heating detection device provided in an embodiment of this application.
[0019] Explanation of reference numerals in the attached diagram: Heating detection circuit construction module 10, operating current sampling module 20, heating detection result display module 30. Detailed Implementation
[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0021] This application provides a heating detection method, such as... Figures 1-2 As shown, the method includes: Step S100: Construct a heating detection circuit. The heating detection circuit includes a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit. The switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit.
[0022] Specifically, a microcontroller is selected as the core control component. The microcontroller has analog-to-digital conversion function and a universal input / output interface, and can complete voltage signal acquisition and level control output. The switch control unit, current sampling unit, and heating load are connected in series to the positive and negative terminals of the power supply to form a complete current path, i.e., the heating circuit. The universal input / output interface of the microcontroller is connected to the control terminal of the switch control unit to output the on or off control level. The analog-to-digital conversion interface of the microcontroller is connected to the output terminal of the current sampling unit to acquire voltage signals. Another universal input / output interface of the microcontroller is connected to the status indicator unit to output the status display control signal.
[0023] In one possible implementation, step S100 further includes: the switch control unit includes a MOS transistor, the drain and source of the MOS transistor are connected in series to the heating circuit, and the gate of the MOS transistor is connected to the microcontroller.
[0024] Specifically, an N-channel MOSFET is selected as the switching control component. The drain of the MOSFET is connected to the positive terminal of the power supply, and the source of the MOSFET is connected to one end of the current sampling unit, so that the drain and source of the MOSFET are connected in series in the heating circuit. The gate of the MOSFET is connected to the general-purpose input / output interface of the microcontroller. The microcontroller controls the conduction and turn-off of the MOSFET by outputting a high level or a low level to the gate. When the gate receives a high level, the MOSFET is turned on and the heating circuit is connected. When the gate receives a low level, the MOSFET is turned off and the heating circuit is disconnected.
[0025] Step S200: When the microcontroller controls the switch control unit to conduct on the surface of the heated device, the sampling operating current of the heating circuit is obtained through the current sampling unit.
[0026] Specifically, the microcontroller outputs a conduction control level to the switch control unit, putting the switch control unit in a conducting state, forming a complete circuit in the heating circuit, and the heating load starts to work. The current sampling unit collects the voltage signal in the heating circuit in real time and outputs it to the microcontroller. The microcontroller converts the received voltage signal into a digital current value through its internal analog-to-digital conversion function, thus completing the acquisition of the sampling working current.
[0027] In one possible implementation, step S200 further includes: the current sampling unit includes a sampling resistor, which is connected in series with the switch control unit; the current sampling unit obtains the sampling operating current of the heating circuit by acquiring the voltage across the sampling resistor.
[0028] Specifically, a precision sampling resistor with a fixed resistance value is selected and connected to the heating circuit to achieve a series connection with the switch control unit. After the heating circuit is turned on, the current flows through the sampling resistor and generates a voltage difference across it. The microcontroller directly acquires the voltage value across the sampling resistor through the analog-to-digital conversion interface. Based on the fixed resistance value of the sampling resistor, the acquired voltage value is converted into the corresponding current value, which is the sampling operating current of the heating circuit.
[0029] Step S300: Analyze the sampling working current according to the heating abnormal event type identification model, and control the status indicator unit to display the heating detection result according to the heating abnormal event identification result.
[0030] Specifically, the microcontroller inputs the acquired sampled operating current into the heating anomaly event type identification model. The model matches and classifies the value and variation characteristics of the sampled operating current, outputting an identification result indicating whether the heating function is normal or the corresponding heating anomaly event type. Based on the identification result output by the model, the microcontroller outputs a corresponding control signal to the status indicator unit, which then displays the corresponding status to intuitively show the heating detection results.
[0031] In one possible implementation, training a heating anomaly event type recognition model, step S300 further includes step S310, which involves collecting historical heating anomaly event samples of the heated device, sampling current data samples corresponding to each heating anomaly event, and label information identifying known heating anomaly event types. The heating anomaly event types include at least one or more of the following: heating film open circuit, heating film short circuit, heating film aging, excessive contact resistance at heating film connection points, and power supply anomaly. Specifically, by simulating various normal and abnormal operating scenarios of the heated device multiple times, historical normal heating event samples and historical heating anomaly event samples are collected. The sample types include normal heating function, heating load open circuit, heating load short circuit, heating load aging, excessive contact resistance at heating load connection points, and abnormal power supply voltage. For each normal or abnormal event sample, a corresponding sampling current data sample is collected through a current sampling unit, recording the real-time value and change process of the current. Simultaneously, each sampling current data sample is labeled with a corresponding known heating event type label, the label content of which completely corresponds to the event sample type.
[0032] Step S320: Extract current change feature vector samples from the sampled current data samples. Based on these current change feature vector samples, iteratively predict the initial heating anomaly event type identification model to establish prediction loss data comparing the predicted heating anomaly event type with the known heating anomaly event type's label information. Specifically, feature extraction is performed on the collected sampled current data samples. Extracted features include current rise slope, steady-state current value, current ripple amplitude, and average current value within a specific time window. These features are combined to form a current change feature vector sample. This feature vector sample is input into the initialized heating anomaly event type identification model. The model outputs the predicted heating anomaly event type based on the feature vector sample. The prediction result is compared with the known label information, and the error value between the prediction result and the label information is calculated. This error value is the prediction loss data.
[0033] Step S330: Optimize the initial heating anomaly event type recognition model according to the predicted loss data to obtain a trained heating anomaly event type recognition model. Specifically, based on the calculated predicted loss data, adjust the parameter weights within the heating anomaly event type recognition model to reduce the error between the prediction result and the label information. Repeat the iterative process of feature vector sample input, prediction, loss data calculation, and parameter adjustment until the predicted loss data is less than a preset threshold and the model's prediction accuracy reaches a preset standard. At this point, stop the iteration to obtain the trained heating anomaly event type recognition model. The trained model is then stored in the microcontroller's storage unit for real-time detection.
[0034] In one possible implementation, the sampled operating current is analyzed based on the heating anomaly event type identification model. Step S300 further includes step S340, which involves downloading the trained heating anomaly event type identification model to the current sampling unit and extracting the current change feature vector of the current sampling unit. The current change feature vector includes the current rise slope, the steady-state current value, the current ripple amplitude, and the average current value within a specific time window. Specifically, the trained heating anomaly event type identification model is downloaded to the microcontroller's program storage area via a communication interface. The microcontroller acquires the sampled operating current data collected by the current sampling unit in real time, extracts features from the real-time current data, calculates the rise slope of the current from its initial rise to stability, determines the steady-state value after the current stabilizes, detects the ripple amplitude of the current during the stable phase, calculates the average current value within a specific time window (e.g., a 1-second time window), and combines the extracted features to form a real-time current change feature vector.
[0035] Step S350: The acquired current change feature vector is input into the heating anomaly event type identification model for identification to obtain the heating anomaly event type. Specifically, the microcontroller inputs the real-time extracted current change feature vector into the fixed heating anomaly event type identification model. The model matches and classifies the feature vector according to the internally trained parameters and outputs the corresponding heating anomaly event type result. For example, if the current rise slope is zero and the steady-state value is zero, the model determines that the heating load is open-circuited; if the current rise slope is too large and the steady-state value is far beyond the normal range, the model determines that the heating load is short-circuited.
[0036] Step S360: Control the status indicator unit to display the heating detection result according to the heating abnormal event type. Specifically, after receiving the heating abnormal event type result output by the model, the microcontroller outputs a corresponding control signal to the status indicator unit according to the preset correspondence, controls the dual-color light-emitting diode to display with a specified color and flashing frequency, and executes the corresponding protection action according to the abnormality type. If it is an abnormality type, the switch control unit is immediately shut down, thus completing the intuitive display of the heating detection result and equipment protection.
[0037] In one possible implementation, step S300 further includes: the status indicator unit includes a dual-color light-emitting diode; parsing the heating abnormality event identification result, the microcontroller including controlling the dual-color light-emitting diode of the status indicator unit to indicate heating function abnormality corresponding to different heating abnormality event types in a first color and different flashing frequencies, while the microcontroller controls the switch control unit to turn off; and the microcontroller controls the dual-color light-emitting diode of the status indicator unit to indicate heating function normal in a second color.
[0038] Specifically, the status indicator unit uses a red-green dual-color LED, with red as the first color and green as the second color. When the microcontroller determines that the heating function is normal, it outputs a continuous high level to the dual-color LED, controlling the LED to continuously illuminate the green light. When the microcontroller determines that the heating function is abnormal, it first outputs a shutdown control level to the switch control unit, causing the switch control unit to immediately shut down and cut off the heating circuit for protection. Subsequently, according to different abnormal event types, it outputs pulse levels of different frequencies to the dual-color LED, controlling the LED to display with red light in combination with different flashing frequencies. For example, when the heating load is open-circuited, the dual-color LED flashes red light once per second; when the heating load is short-circuited, the dual-color LED flashes red light five times per second.
[0039] In one possible implementation, the method further includes: establishing a communication connection between the microcontroller and the host computer software; recording switch control record data, sampling current record data, and status indication record data corresponding to the switch control unit, the current sampling unit, and the status indication unit; and uploading the switch control record data, sampling current record data, and status indication record data to the host computer software for storage.
[0040] Specifically, the microcontroller establishes a communication connection with the host computer through its internal integrated circuit communication interface. After the communication connection is established, the microcontroller records the on and off times and action status of the switch control unit in real time, forming switch control record data. It also records the sampling current value and acquisition time obtained by the current sampling unit in real time, forming sampling current record data. Finally, it records the display color, flashing frequency, and display time of the status indicator unit in real time, forming status indicator record data. The microcontroller sends the above three types of record data to the host computer packet by packet through the internal integrated circuit communication interface at preset time intervals. After receiving the data, the host computer stores the data in local storage medium in chronological order for querying and tracing.
[0041] This application embodiment employs a heating detection circuit composed of a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indicator unit. The switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indicator unit. The microcontroller controls the switch control unit to conduct the heating loop, and the current sampling unit collects the sampling current of the heating loop. A heating anomaly event type identification model is used to analyze and judge the sampling current. Based on the identification results, the status indicator unit is controlled to output the corresponding heating detection results. These technical means solve the technical problems of inaccurate detection results, high implementation costs, and insufficient operational safety in the existing electronic product heating film working status detection and protection links. It achieves the technical effects of accurate detection results, low implementation costs, and safe operation.
[0042] In the above text, refer to Figures 1-2 A heating detection method according to an embodiment of the present invention has been described in detail. Next, reference will be made to... Figure 3 A heating detection device according to an embodiment of the present invention is described.
[0043] A heating detection device according to an embodiment of the present invention addresses the technical problems of inaccurate detection results, high implementation costs, and insufficient operational safety in existing electronic product heating film working status detection and protection processes, achieving the technical effects of accurate detection results, low implementation costs, and safe operation. The heating detection device includes: a heating detection circuit construction module 10, a working current sampling module 20, and a heating detection result display module 30.
[0044] A heating detection circuit construction module 10 is used to construct a heating detection circuit, which includes a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit. The switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit. A working current sampling module 20 is used to obtain the sampling working current of the heating loop through the current sampling unit when the microcontroller controls the switch control unit to conduct on the surface of the heated device. A heating detection result display module 30 is used to analyze the sampling working current according to a heating abnormal event type identification model, and control the status indication unit to display the heating detection result according to the heating abnormal event identification result.
[0045] The operating current sampling module 20 may further include: the current sampling unit includes a sampling resistor, which is connected in series with the switch control unit; the current sampling unit obtains the sampling operating current of the heating circuit by collecting the voltage across the sampling resistor.
[0046] The heating detection result display module 30 may further include: controlling the status indicator unit to display the heating detection result based on the heating abnormality event identification result, wherein the status indicator unit includes a dual-color light-emitting diode; parsing the heating abnormality event identification result, wherein the microcontroller includes controlling the dual-color light-emitting diode of the status indicator unit to indicate heating function abnormality corresponding to different heating abnormality event types in a first color and different flashing frequencies, while the microcontroller controls the switch control unit to turn off; and the microcontroller controls the dual-color light-emitting diode of the status indicator unit to indicate normal heating function in a second color.
[0047] The heating detection circuit construction module 10 may further include: the switch control unit includes a MOS transistor, the drain and source of the MOS transistor are connected in series to the heating circuit, and the gate of the MOS transistor is connected to the microcontroller.
[0048] The device may further include: establishing a communication connection between the microcontroller and the host computer software; recording switch control record data, sampling current record data, and status indication record data corresponding to the switch control unit, the current sampling unit, and the status indication unit; and uploading the switch control record data, sampling current record data, and status indication record data to the host computer software for storage.
[0049] The heating detection result display module 30, which trains the heating anomaly event type identification model, may further include: a sample acquisition unit for acquiring historical heating anomaly event samples of the heated device, sampling current data samples corresponding to each heating anomaly event, and label information identifying known heating anomaly event types; a prediction loss data establishment unit for extracting current change feature vector samples from the sampling current data samples, iteratively predicting the initial heating anomaly event type identification model based on the current change feature vector samples, and establishing prediction loss data for predicting the heating anomaly event type and the label information of known heating anomaly event types; and a heating anomaly event type identification model generation unit for optimizing the initial heating anomaly event type identification model according to the prediction loss data, and obtaining the trained heating anomaly event type identification model.
[0050] The heating detection result display module 30 further includes: a current change feature vector extraction unit for downloading the trained heating anomaly event type identification model to the current sampling unit and extracting the current change feature vector of the current sampling unit, wherein the current change feature vector includes the current rise slope, the current steady-state value, the current ripple amplitude, and the average current value within a specific time window; a heating anomaly identification unit for inputting the acquired current change feature vector into the heating anomaly event type identification model for identification to obtain the heating anomaly event type; and a heating detection result display unit for controlling the status indication unit to display the heating detection result according to the heating anomaly event type.
[0051] The heating detection result display module 30 may further include: the heating abnormal event types include at least one or more of the following: heating film open circuit, heating film short circuit, heating film aging, excessive contact resistance at heating film connection point, and power supply abnormality.
[0052] The heating detection device provided in this embodiment of the invention can execute a heating detection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.
[0053] Although this application makes various references to certain modules in the system according to the embodiments of this application, any number of different modules can be used and run on user terminals and / or servers. The various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy distinction between each other and are not used to limit the scope of protection of this invention.
[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A heating detection method, characterized in that, The method includes: A heating detection circuit is constructed, which includes a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit. The switch control unit, the current sampling unit, and the heating load are connected in series on a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit. When the microcontroller controls the switch control unit to conduct on the surface of the heated device, the sampling operating current of the heating circuit is obtained through the current sampling unit; The sampling current is analyzed based on the heating anomaly event type identification model, and the status indicator unit is controlled to display the heating detection result based on the heating anomaly event identification result.
2. The heating detection method as described in claim 1, characterized in that, The current sampling unit includes a sampling resistor, which is connected in series with the switch control unit; The current sampling unit obtains the sampling operating current of the heating circuit by collecting the voltage across the sampling resistor.
3. The heating detection method as described in claim 1, characterized in that, The heating detection result is displayed by controlling the status indicator unit to display the heating indicator unit based on the heating abnormality event identification result. The status indicator unit includes a dual-color light-emitting diode. The microcontroller analyzes the heating abnormality event identification results and controls the dual-color light-emitting diode of the status indicator unit to indicate the heating function abnormality corresponding to different heating abnormality event types in a first color and different flashing frequencies. At the same time, the microcontroller controls the switch control unit to turn off. The microcontroller controls the dual-color LED of the status indicator unit to indicate that the heating function is normal with a second color.
4. The heating detection method as described in claim 1, characterized in that, The switch control unit includes a MOS transistor, the drain and source of which are connected in series to the heating circuit, and the gate of which is connected to the microcontroller.
5. The heating detection method as described in claim 1, characterized in that, Establish a communication connection between the microcontroller and the host computer software; Record the switch control record data, sampling working current record data, and status indication record data corresponding to the switch control unit, the current sampling unit, and the status indication unit; The switch control recording data, sampling operating current recording data, and status indication recording data are uploaded to the host computer software for storage.
6. The heating detection method as described in claim 1, characterized in that, The method for training the heating anomaly event type identification model includes analyzing the sampled operating current based on the heating anomaly event type identification model: Collect historical heating anomaly event samples of the heated device, sampled current data samples corresponding to each heating anomaly event, and label information identifying known heating anomaly event types; Extract the current change feature vector samples from the sampled current data samples, and iteratively predict the initial heating abnormal event type identification model based on the current change feature vector samples to establish prediction loss data of the label information of the predicted heating abnormal event type and the known heating abnormal event type. The initial heating anomaly event type identification model is optimized based on the predicted loss data to obtain the trained heating anomaly event type identification model.
7. The heating detection method as described in claim 6, characterized in that, The sampling operating current is analyzed based on a heating anomaly event type identification model. The method includes: The trained heating anomaly event type identification model is downloaded to the current sampling unit, and the current change feature vector of the current sampling unit is extracted. The current change feature vector includes the current rise slope, the current steady state value, the current ripple amplitude, and the average current value within a specific time window. The acquired current change feature vector is input into the heating abnormal event type identification model for identification to obtain the heating abnormal event type; The status indicator unit is controlled to display the heating detection results according to the type of heating abnormality event.
8. The heating detection method as described in claim 6, characterized in that, The types of abnormal heating events include at least one or more of the following: heating film open circuit, heating film short circuit, heating film aging, excessive contact resistance at heating film connection points, and power supply abnormality.
9. A heating detection device, characterized in that, The apparatus is used to implement a heating detection method according to any one of claims 1-8, and the apparatus comprises: A heating detection circuit construction module is used to construct a heating detection circuit. The heating detection circuit includes a microcontroller, a switch control unit, a current sampling unit, a heating load, and a status indication unit. The switch control unit, the current sampling unit, and the heating load are connected in series with a power supply to form a heating loop. The microcontroller is connected to the control terminal of the switch control unit, the output terminal of the current sampling unit, and the status indication unit. The working current sampling module is used to obtain the sampled working current of the heating circuit through the current sampling unit when the microcontroller controls the switch control unit to conduct on the surface of the heated device; The heating detection result display module is used to analyze the sampled working current according to the heating abnormal event type identification model, and control the status indicator unit to display the heating detection result according to the heating abnormal event identification result.