Sensor and wiring coplanar arrangement structure of wireless charging foreign object detection device
Patent Information
- Application Number
- CN202522765936.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-26
AI Technical Summary
[0002]无线充电过程中，需要探测无线充电发射端或接收端的表面是否存在金属异物，进而确保无线充电过程的安全可靠进行，现有的异物检测装置一般为电路板以及阵列传感器的组合结构，电路板为柔性或硬性结构，由于传感器排布相对较密，故阵列排布的传感器所对应的电路板的最后引出端的引出排线的数量会远小于传感器数量，每根引出排线将对应位置多个串联的传感器的信号引出，进而进行异物检测时，只能大约检测出对应异常引出排线所对应的一组串联传感器的对应位置，无法精确获得对应的异物所在位置，排出异物时，需要对串联区域的传感器位置全面排查，使得异物排出效率低下
[0006]本实用新型采用在线路板的一表面阵列排布传感器，且将每列的传感器组内的传感器的公共端、信号输出端分别置于宽度方向同侧布置，使得公共端线路方便连接，且由于相邻的传感器间隔布置，使得每个传感器的信号输出端均可以通过独立的独立线路连接至信号传输线排PIN针，每个信号传输线排PIN针独立接收对应传感器的输出信号，当检测到每个传感器的温度或压力大于设定值，即可判定该传感器所对应的区域或区域周边存在异物，其可模糊定位异物的对应位置，使得异物排出方便快捷。
Smart Images
Figure CN224922043U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wireless charging, specifically to the sensor and wiring coplanar arrangement structure of a wireless charging foreign object detection device. Background Technology
[0002] During wireless charging, it is necessary to detect whether there are any metallic foreign objects on the surface of the wireless charging transmitter or receiver to ensure the safe and reliable operation of the wireless charging process. Existing foreign object detection devices are generally a combination of circuit boards and array sensors. The circuit board is a flexible or rigid structure. Because the sensors are arranged relatively densely, the number of lead-out ribbon cables at the end of the circuit board corresponding to the array sensors is much smaller than the number of sensors. Each lead-out ribbon cable leads out the signals of multiple series sensors at the corresponding position. Therefore, when detecting foreign objects, only the position of a set of series sensors corresponding to the abnormal lead-out ribbon cable can be roughly detected, and the exact location of the foreign object cannot be obtained. When removing foreign objects, it is necessary to check the sensor positions in the series area, which makes the foreign object removal efficiency low. Utility Model Content
[0003] To address the aforementioned issues, this invention provides a sensor and wiring coplanar arrangement structure for a wireless charging foreign object detection device, which can fuzzily locate the corresponding position of foreign objects, making foreign object removal convenient and quick.
[0004] A sensor and wiring coplanar arrangement structure for a wireless charging foreign object detection device, characterized in that it includes: The circuit board includes a sensing area and a line transmission end; And several sensors arranged in an array; Several sensors are arranged along the width of one surface of the circuit board to form several sensor groups. Each sensor group is arranged from top to bottom at intervals corresponding to its width position, with gaps between adjacent sensors. The sensors are used to sense the temperature or pressure of the corresponding surface area. The line transmission end is provided with a common line pin and a signal transmission line pin on the same surface corresponding to the arrangement of the sensors. The common line is connected to the common end of each sensor in series and parallel through lead-out lines. The signal output end of each sensor is connected to the signal transmission line pin through an independent line.
[0005] Its further features are: The number of signal transmission pins is equal to the number of sensors, ensuring reliable and accurate coordination between the sensors and the circuitry. Except for the top sensor which protrudes upwards, all other sensors in the same row of sensor groups have their common ends located on one side of the width direction and their signal output ends located on the other side of the width direction. This allows the common line branch lines and independent lines to be arranged on different sides of the sensor, ensuring that the line layout is clear and convenient. The common line PIN pin is located on one or both sides of the line transmission end in the width direction, and the signal transmission cable PIN pins are arranged in the remaining area excluding the common line PIN pin. Preferably, the common line PIN pins are arranged on both sides of the width direction of the line transmission end, and the common line PIN pins on each side are connected to the common end of the corresponding column sensor group covered by the common line and common line branch line on the corresponding side. The common line is connected to the common end of the sensor group in the corresponding column located on both sides through the first common line on both sides and several second branch lines respectively. The first common line is connected to the common end of the top sensor of the sensor group in the corresponding column located on the inside side through the bypass third branch line. The common ends of the adjacent sensors in the sensor group of this column are connected by connecting lines, so that the common line on both sides is connected to the common end of each sensor in series and parallel through lead-out lines respectively. The sensing surface of the circuit board is rectangular, circular, or elliptical. The shape and size of the sensor are selected and arranged according to the surface area corresponding to the sensor designed on the circuit board; Preferably, the sensors on the same circuit board are of the same shape and size, and the spacing between each group of sensors is set to be the same.
[0006] This invention employs an array of sensors arranged on one surface of a circuit board, with the common terminal and signal output terminal of the sensors in each row of sensor groups placed on the same side in the width direction. This facilitates the connection of the common terminal lines. Furthermore, due to the spacing between adjacent sensors, the signal output terminal of each sensor can be connected to the signal transmission line pins via an independent line. Each signal transmission line pin independently receives the output signal of the corresponding sensor. When the temperature or pressure of each sensor is detected to be greater than a set value, it can be determined that there is a foreign object in the area corresponding to the sensor or the surrounding area. This allows for a fuzzy location of the foreign object, making it convenient and quick to remove. Attached Figure Description
[0007] Figure 1 This is a layout diagram of the sensor and wiring according to a specific embodiment of the present invention; Figure 2 This is a diagram showing the arrangement of the sensor and wiring in a specific embodiment two of this utility model; Figure 3This is a diagram showing the arrangement of the sensor and wiring in a specific embodiment three of this utility model; Figure 4 for Figure 1 A magnified view of part A; The names corresponding to the serial numbers in the diagram are as follows: PIN1 for common line, PIN2 for signal transmission cable, PIN3 for common line, PIN4 for independent line, PIN5 for connecting line, PIN6 for first common line, PIN7 for second branch line, PIN8 for third branch line; Circuit board 10, sensing area 11, line transmission terminal 12, sensor 20, top sensor 201, common terminal 21, signal output terminal 22. Detailed Implementation
[0008] The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device is shown in [reference]. Figures 1-4 It includes: The circuit board 10 includes a sensing area 11 and a line transmission end 12; And several arrays of sensors 20; Several sensors 20 are arranged along the width of one surface of the circuit board 10 to form several sensor groups. Each sensor group is arranged from top to bottom at intervals corresponding to its width position. There is a gap between adjacent sensors 20. The sensors 20 are used to sense the temperature or pressure of the corresponding surface area. The line transmission terminal 12 is provided with a common line pin 1 and a signal transmission line pin 2 on the same surface corresponding to the arrangement of the sensors. The common line 3 is connected to the common terminal 21 of each sensor 20 in series and parallel through lead-out lines. The signal output terminal 22 of each sensor 20 is connected to the corresponding signal transmission line pin 2 through an independent line 4.
[0009] In practice, the number of signal transmission pins 2 is equal to the number of sensors 20, ensuring that the coordinated arrangement of sensors 20 and lines is reliable and accurate.
[0010] In specific embodiments one to three, except for the top sensor 201 with an upward protrusion, the common end 21 of all other sensors 20 in the same row of sensor groups is located on one side of the width direction, and the signal output end 22 is located on the other side of the width direction. This makes the common line branch line and the independent line 4 located on different sides of the sensor 20, ensuring that the line layout is clear and convenient. The positions of the common terminal 21 and signal output terminal 22 of the convex top sensor 201 are adjusted according to the arrangement density of the independent lines below.
[0011] In specific embodiments one to three, the common line PIN pin 1 is located on both sides of the width direction of the line transmission end, and the remaining area excluding the common line PIN pin 1 is arranged with signal transmission cable PIN pin 2.
[0012] In specific embodiments one to three, two rows of sensor groups are arranged on the left side of the sensing surface 11, and two rows of sensor groups are arranged on the right side of the sensing surface 11. The common line PIN pins 1 are arranged on both sides of the line transmission end 12 in the width direction. The common line PIN pins 1 on each side are connected to the common end 21 of the sensor 20 of the corresponding column of sensor group located on both sides through the common line 3 of the corresponding side, the first common line 6, and several second branch lines 7. The first common line 6 is connected to the common end 21 of the top sensor 201 of the corresponding column of sensor group located on the inner side through the bypass third branch line 8. The common ends 21 of adjacent sensors 20 of the inner column of sensor group are connected through the connecting line 5, so that the common lines 3 on both sides are connected to the common end of each sensor 20 in series and parallel through the lead-out lines.
[0013] In the first specific embodiment, the sensing surface 11 of the circuit board 10 is circular.
[0014] In the first specific embodiment, the sensing surface 11 of the circuit board 10 is elliptical; In the first specific embodiment, the sensing surface 12 of the circuit board 10 is rectangular.
[0015] In specific embodiments one to three, the shape and size of the sensor 20 are selected and arranged according to the area corresponding to the sensor designed on the circuit board; the shape and size of the sensors 20 on the same circuit board 10 should be the same, and the spacing between each group of sensors 20 should be the same to ensure that the area of their sensing area is equal, so as to perform subsequent reliable fuzzy positioning.
[0016] It employs an array of sensors arranged on one surface of a circuit board, with the common terminal and signal output terminal of the sensors in each column of sensor groups placed on the same side of the width direction. This facilitates the connection of the common terminal line. Furthermore, due to the spacing between adjacent sensors, the signal output terminal of each sensor can be connected to the signal transmission line pin header via an independent line. Each signal transmission line pin header independently receives the output signal of the corresponding sensor. When the temperature or pressure of each sensor is detected to be greater than a set value, it can be determined that there is a foreign object in the area corresponding to the sensor or the surrounding area. It can roughly locate the corresponding position of the foreign object, making the removal of the foreign object convenient and quick.
[0017] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A sensor and wiring coplanar arrangement structure for a wireless charging foreign object detection device, characterized in that, It includes: The circuit board includes a sensing area and a line transmission end; And several sensors arranged in an array; Several sensors are arranged along the width of one surface of the circuit board to form several sensor groups. Each sensor group is arranged from top to bottom at intervals corresponding to its width position, with gaps between adjacent sensors. The sensors are used to sense the temperature or pressure of the corresponding surface area. The line transmission end is provided with a common line pin and a signal transmission line pin on the same surface corresponding to the arrangement of the sensors. The common line is connected to the common end of each sensor in series and parallel through lead-out lines. The signal output end of each sensor is connected to the signal transmission line pin through an independent line.
2. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 1, characterized in that: The number of signal transmission pins is equal to the number of sensors.
3. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 2, characterized in that: Except for the top sensor which protrudes upwards, all other sensors in the same row of sensor groups have their common ends located on one side of the width direction, while their signal output ends are located on the other side of the width direction.
4. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 1, characterized in that: The common line PIN pins are located on one or both sides of the width direction of the line transmission end, and the signal transmission cable PIN pins are arranged in the remaining area excluding the common line PIN pins.
5. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 4, characterized in that: The common line PIN pins are located on both sides of the line transmission end in the width direction. The common line PIN pins on each side are connected to the common end of the corresponding column sensor group covered by the common line and common line branch line on the corresponding side.
6. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 5, characterized in that: The common line is connected to the common terminal of the corresponding column of sensor group located on both sides through the first common line on both sides and several second branch lines respectively. The first common line is connected to the common terminal of the top sensor of the corresponding column of sensor group located on the inside side through the bypass third branch line. The common terminals of adjacent sensors of the column of sensor group are connected by connecting lines, so that the common line on both sides is connected to the common terminal of each sensor in series and parallel through lead-out lines respectively.
7. The sensor and wiring coplanar arrangement structure of the wireless charging foreign object detection device according to claim 1, characterized in that: The shape and size of the sensor are selected and arranged according to the surface area corresponding to the sensor designed on the circuit board.