CN-121995149-A - Heating detection method and device

CN121995149ACN 121995149 ACN121995149 ACN 121995149ACN-121995149-A

Abstract

The application discloses a heating detection method and a heating detection device, and relates to the relevant field of electronic circuit protection, wherein the method comprises the steps of constructing a heating detection circuit, connecting a switch control unit, a current sampling unit and a heating load in series on a power supply to construct a heating loop, and connecting a microcontroller with a control end of the switch control unit, an output end of the current sampling unit and a state indicating unit; and the microcontroller controls the switch control unit to be conducted on the surface of the heated device, acquires the sampling working current of the heating loop through the current sampling unit, analyzes according to the heating abnormal event type identification model, and controls the state indicating unit to display the heating detection result according to the identification result. The application solves the problems of inaccurate detection result, high implementation cost and insufficient operation safety existing in the detection and protection of the working state of the heating film of the existing electronic product, and achieves the effects of accurate detection result, low implementation cost and safe operation and use.

Inventors

JU QIANG
YANG MINGSHENG
PENG XIUCHUN

Assignees

联想长风科技(北京)有限公司

Dates

Publication Date: 20260508
Application Date: 20260326

Claims (9)

1. A method of heat detection, the method comprising: The method comprises the steps of constructing a heating detection circuit, wherein the heating detection circuit comprises a microcontroller, a switch control unit, a current sampling unit, a heating load and a state indicating unit, the switch control unit, the current sampling unit and the heating load are connected in series on a power supply to construct a heating loop, and the microcontroller is connected with a control end of the switch control unit, an output end of the current sampling unit and the state indicating unit; when the microcontroller controls the switch control unit to be conducted on the surface of the heated device, the sampling working current of the heating loop is obtained through the current sampling unit; Analyzing the sampling working current according to the heating abnormal event type identification model, and controlling the state indicating unit to display a heating detection result according to the heating abnormal event identification result.
2. A heating detection method according to claim 1, wherein the current sampling unit includes a sampling resistor connected in series with the switch control unit; and the current sampling unit acquires the sampling working current of the heating loop by collecting the voltages at two ends of the sampling resistor.
3. The heating detection method according to claim 1, wherein the status indication unit is controlled to display a heating detection result according to a heating abnormality event recognition result, the status indication unit including a two-color light emitting diode; Analyzing a heating abnormal event identification result, wherein the microcontroller comprises a control unit for controlling the double-color light emitting diode of the state indicating unit to indicate heating function anomalies corresponding to different heating abnormal event types in a first color and different flicker frequencies, and meanwhile, the microcontroller controls the switch control unit to be turned off; and the microcontroller controls the double-color light emitting diode of the state indicating unit to indicate that the heating function is normal in a second color.
4. The heating detection method according to claim 1, wherein the switch control unit comprises a MOS transistor, a drain electrode and a source electrode of the MOS transistor are connected in series to the heating circuit, and a gate electrode of the MOS transistor is connected with the microcontroller.
5. A method of heating detection as claimed in claim 1, wherein a communication connection between the microcontroller and host computer software is established; Recording switch control record data, sampling working current record data and state indication record data corresponding to the switch control unit, the current sampling unit and the state indication unit; And uploading the switch control record data, the sampling working current record data and the state indication record data to the upper computer software for storage.
6. The heating detection method according to claim 1, wherein the sampled operating current is analyzed based on a heating anomaly event type recognition model, the method for training the heating anomaly event type recognition model comprising: Collecting a historical heating abnormal event sample of the heated device, a sampling current data sample corresponding to each heating abnormal event and label information for identifying the type of the known heating abnormal event; extracting a current change feature vector sample of the sampling current data sample, carrying out iterative prediction on an initialized heating abnormal event type identification model based on the current change feature vector sample, and establishing prediction loss data of the predicted heating abnormal event type and label information of the known heating abnormal event type; and optimizing the initialized heating abnormal event type identification model according to the predicted loss data to obtain a trained heating abnormal event type identification model.
7. The heating detection method according to claim 6, wherein the sampled operating current is analyzed based on a heating anomaly event type recognition model, the method comprising: Downloading the trained heating abnormal event type identification model to the current sampling unit, and extracting a current change characteristic vector of the current sampling unit, wherein the current change characteristic vector comprises a current rising slope, a current steady-state value, a current ripple amplitude and a current average value in a specific time window; Inputting the obtained current change feature vector into the heating abnormal event type identification model to identify, and obtaining the heating abnormal event type; and controlling the state indicating unit to display a heating detection result according to the type of the heating abnormal event.
8. The method of claim 6, wherein the type of heating anomaly includes at least one or more of an open heating film, a short heating film, aging heating film, excessive contact resistance at a heating film connection point, and an anomaly in power supply.
9. A heating detection apparatus for carrying out a heating detection method according to any one of claims 1 to 8, said apparatus comprising: The heating detection circuit construction module is used for constructing a heating detection circuit, and the heating detection circuit comprises a microcontroller, a switch control unit, a current sampling unit, a heating load and a state indicating unit, wherein the switch control unit, the current sampling unit and the heating load are connected in series on a power supply to construct a heating loop, and the microcontroller is connected with a control end of the switch control unit, an output end of the current sampling unit and the state indicating unit; The working current sampling module is used for acquiring the sampling working current of the heating loop through the current sampling unit when the microcontroller controls the switch control unit to be conducted on the surface of the heated device; And the heating detection result display module is used for analyzing the sampling working current according to the heating abnormal event type identification model and controlling the state indication unit to display the heating detection result according to the heating abnormal event identification result.

Description

Heating detection method and device Technical Field The present application relates to the field of electronic circuit protection, and in particular, to a heating detection method and apparatus. Background The low-temperature stable working capacity is a key performance for guaranteeing reliable operation of electronic products in outdoor severe environments, and the starting and working reliability of equipment under extreme working conditions is directly determined. In the industry, a heating film is generally adopted to actively heat an electronic device working in a low-temperature environment, so that the electronic device is maintained in a proper working temperature range. The current detection mode aiming at the heating film function is mostly dependent on manual touch judgment or special imaging equipment observation, and is easily restricted by subjective factors, equipment cost and operation safety. In the related art at the present stage, the detection result is inaccurate, the implementation cost is high and the operation safety is insufficient in the working state detection and protection link of the heating film of the electronic product. Disclosure of Invention The application provides a heating detection method and a heating detection device, which adopt the technical means of constructing a heating detection circuit consisting of a microcontroller, a switch control unit, a current sampling unit, a heating load and a state indicating unit, and connecting the switch control unit, the current sampling unit and the heating load in series on a power supply to form a heating loop, so that the microcontroller is respectively connected with a control end of the switch control unit, an output end of the current sampling unit and the state indicating unit, the microcontroller controls the switch control unit to conduct the heating loop, the sampling working current of the heating loop is collected through the current sampling unit, the sampling working current is analyzed and judged by utilizing a heating abnormal event type identification model, and the corresponding heating detection result is output by controlling the state indicating unit according to the identification result. The application provides a heating detection method, which comprises the steps of constructing a heating detection circuit, wherein the heating detection circuit comprises a microcontroller, a switch control unit, a current sampling unit, a heating load and a state indicating unit, the switch control unit, the current sampling unit and the heating load are connected in series on a power supply to construct a heating loop, the microcontroller is connected with a control end of the switch control unit, an output end of the current sampling unit and the state indicating unit, when the microcontroller controls the switch control unit to be conducted on the surface of a heated device, sampling working current of the heating loop is obtained through the current sampling unit, the sampling working current is analyzed according to a heating abnormal event type identification model, and the state indicating unit is controlled to display a heating detection result according to a heating abnormal event identification result. In a possible implementation mode, the current sampling unit comprises a sampling resistor, the sampling resistor is connected with the switch control unit in series, and the current sampling unit acquires sampling working current of the heating loop by collecting voltages at two ends of the sampling resistor. In a possible implementation manner, the following processing is performed, wherein the state indication unit is controlled to display a heating detection result according to a heating abnormal event identification result, the state indication unit comprises a double-color light emitting diode, the heating abnormal event identification result is analyzed, the microcontroller comprises a control unit for controlling the double-color light emitting diode of the state indication unit to indicate abnormal heating functions corresponding to different heating abnormal event types in a first color and different flashing frequencies, the microcontroller controls the switch control unit to be closed, and the microcontroller controls the double-color light emitting diode of the state indication unit to indicate normal heating functions in a second color. In a possible implementation, the switch control unit comprises a MOS tube, wherein the drain electrode and the source electrode of the MOS tube are connected in series to the heating loop, and the grid electrode of the MOS tube is connected with the microcontroller. In a possible implementation manner, the method comprises the steps of establishing communication connection between the microcontroller and the upper computer software, recording switch control record data, sampling working current record data and state indication record data corresponding to the switc