A foreign object monitoring system for wireless charging

Abstract

The utility model relates to wireless charging technical field discloses a kind of foreign matter monitoring systems for wireless charging, including wireless charging module, including wireless charging transmission unit, energy storage unit and the wireless charging reception unit of the wireless charging transmission unit corresponding arrangement;Heat monitoring module, including infrared camera, thermal imaging unit and display unit;Control module, the control module includes main control unit, analysis identification unit and switch unit, the analysis identification unit and the switch unit are electrically connected with the main control unit respectively, and the control module is electrically connected with the heat monitoring module and wireless charging module respectively;Online monitoring module, the online monitoring module is signal connected with the heat monitoring module and the control module respectively by communication module.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and in particular to a foreign object detection system for wireless charging. Background Technology

[0002] During wireless charging, if a metallic foreign object is placed in the middle of the power coil, it will generate eddy currents, causing the foreign object to heat up and potentially posing a safety hazard. Therefore, wireless charging systems must be equipped with foreign object detection devices to ensure charging safety. Current technologies generally use power difference calculations to detect foreign objects, that is, determining the presence of a metallic foreign object by the difference between the received power and the transmitted power. Some methods use temperature measurement; if a metallic foreign object is present, the electromagnetic field will heat it, thus detecting the foreign object through temperature measurement. However, since objects placed on the power coil generate heat during charging, it is impossible to detect whether they affect wireless charging. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a foreign object detection system for wireless charging.

[0004] The technical solution of this utility model is as follows: This utility model discloses a foreign object detection system for wireless charging, including a wireless charging module, including a wireless charging transmitting unit, an energy storage unit, and a wireless charging receiving unit corresponding to the wireless charging transmitting unit. The wireless charging transmitting unit includes at least one set of wireless charging coils for wireless charging after coil coupling.

[0005] The heat monitoring module includes an infrared camera, a thermal imaging unit, and a display unit, used to acquire infrared radiation images and collect temperature data within the wireless charging area.

[0006] The control module includes a main control unit, an analysis and identification unit, and a switch unit. The analysis and identification unit and the switch unit are electrically connected to the main control unit, and the control module is electrically connected to the heat monitoring module and the wireless charging module.

[0007] An online monitoring module is connected to the heat monitoring module, the control module, and the photo verification module via a communication module, and is used to monitor the wireless charging status online.

[0008] As can be seen from the above scheme, the heat monitoring module is used to monitor the temperature of the wireless charging area, and the wireless charging module is used to achieve wireless charging through the coupling of the wireless charging coil and the charging receiving coil.

[0009] The control module is also electrically connected to an early warning module, which includes an audible and visual alarm. Therefore, the early warning module is used to provide early warnings.

[0010] The wireless charging module also includes a charging base, which contains an energy storage power source and a magnetic shielding sheet. The wireless charging coil is disposed on the magnetic shielding sheet and is electrically connected to the energy storage power source.

[0011] The display unit is a display screen, and the thermal imaging unit is electrically connected to both the infrared camera and the display unit.

[0012] The photographic inspection module includes an industrial camera, which is positioned facing the wireless charging area. Therefore, the industrial camera is used to take photographs of the object, which are then used for verification and archiving during foreign object detection in wireless charging.

[0013] The online monitoring module can be a local monitoring display screen or a mobile terminal. Therefore, the local monitoring display screen is used for centralized monitoring of multiple wireless charging systems, while the mobile terminal is used for remote monitoring of wireless charging status. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flow local structure of this utility model;

[0015] Figure 2 This is a flowchart of the present invention;

[0016] Figure 3 This is a control diagram of the present invention; Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figures 1 to 3 As shown, this utility model is a foreign object detection system for wireless charging. The wireless charging module 1 includes a wireless charging transmitting unit, an energy storage unit, and a wireless charging receiving unit corresponding to the wireless charging transmitting unit. The wireless charging transmitting unit includes at least one set of wireless charging coils for wireless charging after coil coupling.

[0019] The heat monitoring module 2 includes an infrared camera 21, a thermal imaging unit 22, and a display unit 23, which are used to acquire infrared radiation images and collect temperature data within the wireless charging area.

[0020] The control module 3 includes a main control unit, an analysis and identification unit, and a switch unit. The analysis and identification unit and the switch unit are electrically connected to the main control unit, and the control module 3 is electrically connected to the heat monitoring module 2 and the wireless charging module 1, respectively.

[0021] The online monitoring module 4 is connected to the heat monitoring module 2, the control module 3 and the photo inspection module via the communication module 5, and is used to monitor the wireless charging status online.

[0022] In this embodiment, the communication module 5 uses wireless communication.

[0023] The control module 3 is also electrically connected to an early warning module, which includes an audible and visual alarm. In this embodiment, the online monitoring module 4 is equipped with an early warning unit for remotely issuing early warnings during wireless charging.

[0024] The wireless charging module 1 also includes a charging base, which contains an energy storage power source and a magnetic shielding sheet. The wireless charging coil is disposed on the magnetic shielding sheet and is electrically connected to the energy storage power source.

[0025] The photo verification module includes an industrial camera, which is positioned facing the wireless charging area. When an abnormality is detected in the wireless charging, the industrial camera is used to view and photograph the scene for verification.

[0026] The display unit 23 is a display screen, and the thermal imaging unit 22 is electrically connected to the infrared camera 21 and the display unit 23 respectively.

[0027] The online monitoring module 4 is a local monitoring display screen or a mobile terminal. In this embodiment, a pressure sensor is provided on the charging dock, and the industrial camera is electrically connected to the pressure sensor and signal-connected to the online monitoring module. The industrial camera takes pictures of the wireless charging area and performs online monitoring through the online monitoring module 4. When wireless charging malfunctions and stops, the scene is viewed and photographed by the industrial camera for remote verification.

[0028] The steps for foreign object detection during wireless charging according to this utility model are as follows: During wireless charging, the heat monitoring module 2 performs thermal imaging of the wireless charging area, and determines the highest temperature T0 in the wireless charging area based on the color distribution in the thermal image; the control module 3 compares the collected temperature T0 with the set temperature threshold T. P If T0 is greater than the set threshold T, then... PIf the warning module detects a metallic foreign object, it will issue an audible and visual warning signal, transmit the warning signal to the mobile detection terminal, and stop wireless charging; if T0 is less than the set temperature threshold T... P If the temperature changes within the wireless charging area, the system continues to collect temperature data and obtain the temperature change value ΔT per unit time. If ΔT = 0, the foreign object is identified as a biological object, and the warning module issues an audible and visual warning signal, which is transmitted to the mobile detection terminal. Wireless charging is then stopped. If ΔT < T Q (Charging heat rise value set temperature rise value), wireless charging module 1 continues to operate for wireless charging, if ΔT≥T Q The warning module emits an audible and visual warning signal for the presence of a metallic foreign object, which is then transmitted to the mobile detection terminal, stopping wireless charging.

[0029] In this embodiment, considering that the object will generate heat loss and thus heat up during wireless charging, a temperature rise value T is set in advance due to the heat generated during charging. Q In this embodiment, the highest temperature in the infrared image is extracted, and the RGB brightness values ​​of each pixel in the infrared image of the wireless charging area are determined. Based on the RGB brightness values ​​of each pixel, the infrared image of the area to be detected is converted into a grayscale image, and the grayscale value corresponding to the highest temperature is determined. The temperature calculation value of each pixel in the abnormal area of ​​the grayscale image is calculated, the temperature calculation values ​​are sorted, and the maximum value among the temperature calculation values ​​is selected as the highest temperature T0.

[0030] In this embodiment, when a biological foreign object is detected, the control module 3 issues a biological expulsion signal. Simultaneously, the control module 3 uses windshield wipers to expel the active biological object. When a metallic foreign object is detected, a warning level is generated based on a preset temperature threshold, and a foreign object detection level warning is issued.

[0031] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foreign object detection system for wireless charging, characterized in that, include: The wireless charging module (1) includes a wireless charging transmitter unit, an energy storage unit, and a wireless charging receiver unit corresponding to the wireless charging transmitter unit. The wireless charging transmitter unit includes at least one set of wireless charging coils for wireless charging after coil coupling. The heat monitoring module (2) includes an infrared camera (21), a thermal imaging unit (22) and a display unit (23), which are used to acquire infrared radiation imaging and collect temperature data in the wireless charging area; The control module (3) includes a main control unit, an analysis and identification unit, and a switch unit. The analysis and identification unit and the switch unit are electrically connected to the main control unit, and the control module (3) is electrically connected to the heat monitoring module (2) and the wireless charging module (1). The online monitoring module (4) is connected to the heat monitoring module (2), the control module (3) and the photo inspection module via the communication module (5) to monitor the wireless charging status online.

2. The foreign object detection system for wireless charging according to claim 1, characterized in that, The control module (3) is also electrically connected to an early warning module, which includes an audible and visual alarm.

3. The foreign object detection system for wireless charging according to claim 1, characterized in that, The photo inspection module includes an industrial camera, which is positioned facing the wireless charging area.

4. The foreign object detection system for wireless charging according to claim 1, characterized in that, The wireless charging module (1) also includes a charging base, in which an energy storage power supply and a magnetic shielding sheet are provided. The wireless charging coil is disposed on the magnetic shielding sheet and is electrically connected to the energy storage power supply.

5. The foreign object detection system for wireless charging according to claim 1, characterized in that, The display unit (23) is a display screen, and the thermal imaging unit (22) is electrically connected to the infrared camera (21) and the display unit (23) respectively.

6. The foreign object detection system for wireless charging according to claim 1, characterized in that, The online monitoring module (4) is a local monitoring display screen or a mobile terminal.

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