Sensor of wireless charging foreign matter detection device and wiring structure thereof

Abstract

The utility model provides a kind of sensor and its wiring structure of wireless charging foreign matter detection device, it can make that sensor arrangement is relatively denser, and do not affect circuit arrangement, and then ensure that foreign matter detection is accurate and reliable.It includes: circuit board component, it includes first induction surface and second induction surface, each induction surface includes induction surface area and circuit transmission end;And several sensors;The induction surface area of two induction surfaces of the circuit board component respectively arrange two groups of sensor arrays, the sensor of each sensor array is arranged to form several column sensor groups along the width surface area of the induction surface area of first induction surface or second induction surface, each sensor group is arranged at intervals from top to bottom in its width position, there is interval between adjacent sensors, two column sensor groups of different induction surfaces combination form integral sensor array, and the sensor of different induction surfaces is filled in the interval position of adjacent sensor of another induction surface.

Description

Technical Field

[0001] This utility model relates to the technical field of wireless charging, specifically to a sensor and wiring structure for a wireless charging foreign object detection device. Background Technology

[0002] During wireless charging, it is necessary to detect the presence of 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 sensors are arranged on one surface of the circuit board, and corresponding signal leads and common lines of the sensors also need to be arranged on the surface of the circuit board. Since the sensors, signal leads, and common lines are all arranged on the surface of a single circuit board, there are many components or lines that need to be arranged on the surface of the circuit board. In order to avoid interference, a relatively sparse sensor layout is required. However, if a foreign object is located in the gap between two adjacent sensors, it cannot be accurately and reliably detected, which may lead to safety hazards in wireless charging. Therefore, there is an urgent need to develop a sensor and its wiring structure that can arrange the sensors relatively densely without affecting the circuit layout. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a sensor and its wiring structure for a wireless charging foreign object detection device. This structure allows for a relatively dense sensor arrangement without affecting the wiring layout, thereby ensuring accurate and reliable foreign object detection.

[0004] A sensor and its wiring structure for a wireless charging foreign object detection device, characterized in that it comprises: The circuit board assembly includes a first sensing surface and a second sensing surface, each sensing surface including a sensing area and a line transmission end; And several sensors; Two sets of sensor arrays are arranged in the sensing areas of the two sensing surfaces of the circuit board assembly. The sensors in each sensor array are arranged in several columns along the width of the sensing area of ​​the first or second sensing surface. Each sensor group is arranged from top to bottom at intervals corresponding to its width position, with gaps between adjacent sensors. The two columns of sensor groups of different sensing surfaces are combined to form an overall sensor array. The sensors of different sensing surfaces fill the gaps between adjacent sensors on the other sensing surface. Each sensing surface has a common line and a signal transmission cable at its line transmission end. The common line is connected to the common end of each sensor arranged on the same surface in series and parallel through lead-out lines arranged on the same surface. The signal output end of each sensor arranged on the same surface is connected to the corresponding signal transmission cable arranged on the same surface through an independent line.

[0005] Its further features are: When the circuit board assembly is a single circuit board, the front side of the circuit board is the first sensing surface, and the back side of the circuit board is the second sensing surface. When the circuit board assembly consists of two stacked circuit boards, it includes a first circuit board and a second circuit board. The upper surface of the first circuit board is a first sensing surface, and the upper surface of the second circuit board is a second sensing surface. The first circuit board is provided with a first clearance hole corresponding to the position of the sensor on the second circuit board, and the second circuit board is provided with a second clearance hole corresponding to the position of the sensor on the first circuit board. This ensures that the sensor can reliably sense whether there are foreign objects in the area covered by the sensing area. The number of signal transmission cables on each sensing surface is equal to the number of sensors, ensuring reliable and accurate coordinated arrangement of sensors and lines; The common end of all sensors in the same row of sensors on the same sensing surface is located on one side of the width direction, while the signal output end is 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 clear and convenient line layout. The common line is located on one or both sides of the line transmission end in the width direction, and the signal transmission cable is arranged in the remaining area excluding the common line. Preferably, the common line is located on both sides of the line transmission end in the width direction, and the common line on each side is connected to the common end of the sensor of the corresponding column sensor group it covers through the common line bus and common line branch line on the corresponding side. The common line is connected to the common terminal at the outer position of the corresponding column of sensor group located on both sides through the common line bus on both sides and several first branch lines respectively. When a sensor group is also installed inside the side sensor group, the common bus of one or both sides is connected to the branch bus located inside the side via a bypass second branch line as needed. The branch return bus is directly connected to the common terminal of each sensor in the inside sensor group, or the branch return bus is connected to the common terminal of each sensor in the inside sensor group via several third branch lines. The sensing surface area of ​​the circuit board assembly 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 assembly have the same shape and size, and the spacing between all sensors on different surfaces is the same.

[0006] This invention employs sensors arranged on both surfaces of a circuit board assembly. The common terminal and signal output terminal of the sensors in each row of the sensor group on the same sensing surface are placed on the same side in the width direction, making it convenient to connect the common line. Due to the spacing between adjacent sensors, the signal output terminal of each sensor can be connected to the signal transmission line through an independent line. The two sets of sensor arrays are independently set for different surface areas, which makes the sensor arrangement convenient and reliable. It allows the sensor arrangement to be relatively dense without affecting the circuit layout, thereby ensuring accurate and reliable foreign object detection. Attached Figure Description

[0007] Figure 1 An exploded view of the sensor and its wiring layout in a specific embodiment of this utility model; Figure 2 An exploded view of the sensor and its wiring layout in a specific embodiment two of this utility model; Figure 3 An exploded view of the sensor and its wiring layout in a specific embodiment three of this utility model; Figure 4 This is a top view of a specific embodiment four of the present utility model; Figure 5 This is a bottom view of a specific embodiment four of this utility model; Figure 6 This is a top view of a specific embodiment five of the present utility model; Figure 7 This is a bottom view of a specific embodiment five of the present utility model; Figure 8 This is a top view of a specific embodiment six of the present utility model; Figure 9 This is a bottom view of a specific embodiment six of the present utility model; The names corresponding to the serial numbers in the diagram are as follows: Circuit board assembly 10, sensing surface 11, line transmission end 12, first sensing surface 101, second sensing surface 102, sensor 20, common end 21, signal output end 22, first circuit board 30, first clearance hole 31, second circuit board 40, second clearance hole 41; 1. Common line, 2. Signal transmission cable, 3. Independent line, 4. Common line bus, 5. First branch line, 6. Second branch line, 7. Branch return bus, 8. Third branch line. Detailed Implementation

[0008] A sensor and its wiring structure for a wireless charging foreign object detection device are shown below. Figures 1-9 It includes a circuit board assembly 10 and several sensors 20; The circuit board assembly 10 includes a first sensing surface 101 and a second sensing surface 102, each sensing surface including a sensing area 11 and a line transmission end 12. Two sets of sensor arrays are arranged in the sensing areas of the two sensing surfaces of the circuit board assembly 10. The sensors 20 of each sensor array are arranged in several columns along the width of the sensing area of ​​the first sensing surface 101 or the second sensing surface 102. Each set of sensor arrays is arranged from top to bottom at intervals corresponding to its width position. There is a gap between adjacent sensors 20. The two columns of sensor arrays of different sensing surfaces are combined to form an overall sensor array. The sensors 20 of different sensing surfaces fill the gaps between adjacent sensors on the other sensing surface. The line transmission end 12 of each sensing surface is provided with a common line 1 and a signal transmission line 2. The common line 1 is connected to the common end 21 of each sensor 20 arranged on the same surface in series and parallel through the lead-out lines arranged on the same surface. The signal output end 22 of each sensor 20 arranged on the same surface is connected to the corresponding signal transmission line 2 arranged on the same surface through an independent line 3.

[0009] In specific embodiments one, two, and three, the circuit board assembly 10 consists of two sets of stacked circuit boards. The circuit board assembly 10 is formed by stacking a first circuit board 30 and a second circuit board 40 of the same shape. The upper surface of the first circuit board 30 is the first sensing surface 101, and the upper surface of the second circuit board 40 is the second sensing surface 102. The first circuit board 30 is provided with a first clearance hole 31 corresponding to the position of the sensor 20 on the second circuit board 40, and the second circuit board 40 is provided with a second clearance hole 41 corresponding to the position of the sensor 20 on the first circuit board 30. This ensures that the sensor can reliably sense whether there are foreign objects in the area covered by the sensing area.

[0010] In specific embodiments four, five, and six; when the circuit board assembly is a single circuit board, the front side of the circuit board is the first sensing surface 101, and the back side of the circuit board is the second sensing surface 102.

[0011] The number of signal transmission cables 2 on each sensing surface is equal to the number of sensors 20, ensuring reliable and accurate coordination between the sensors 20 and the cables.

[0012] In practice, the common terminal 21 of all sensors 20 located in the same column of sensors on the same sensing surface is located on one side of the width direction, while the signal output terminal 22 is 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.

[0013] In a specific embodiment, the common line 1 is arranged on both sides of the line transmission end 11 in the width direction, and the signal transmission line 2 is arranged in the remaining area excluding the common line 1; the common line 1 on each side is connected to the common end 21 of the sensor 20 of the corresponding column sensor group it covers through the common line bus 4 and the common line branch line on the corresponding side. The common line 1 is connected to the common terminal 21 of the sensor 20 located on the outer side of the sensor group in the corresponding column on both sides via the common line bus 4 on both sides and several first branch lines 5.

[0014] In a specific embodiment, three rows of sensor groups are arranged along the width direction on each sensing surface. The common bus 4 on one side is connected to the branch bus 7 located on the inner side through the bypass second branch line 6. The branch return bus 7 is directly connected to the common terminal 21 of each sensor 20 in the middle sensor group located on the inner side, or the branch return bus 7 is connected to the common terminal 21 of each sensor 20 in the middle sensor group located on the inner side through several third branch lines 8.

[0015] Specific Implementation Example 1, see Figure 1 The circuit board assembly is composed of a first circuit board 30 and a second circuit board 40 stacked together, and its sensing area is rectangular.

[0016] See Specific Implementation Example 2 Figure 2 The circuit board assembly is composed of a first circuit board 30 and a second circuit board 40 stacked together, and its sensing surface is elliptical.

[0017] See Specific Implementation Example 3. Figure 3 The circuit board assembly is composed of a first circuit board 30 and a second circuit board 40 stacked together, and its sensing surface is circular.

[0018] See Specific Implementation Example 4 Figure 4 , Figure 5 The circuit board assembly is a single circuit board. The front side of the circuit board is the first sensing surface 101, and the back side of the circuit board is the second sensing surface 102. The sensing area is rectangular.

[0019] See Specific Implementation Example 5. Figure 6 , Figure 7 The circuit board assembly is a single circuit board. The front side of the circuit board is the first sensing surface 101, and the back side of the circuit board is the second sensing surface 102. The sensing surface area is elliptical.

[0020] See Specific Implementation Example Six. Figure 8 , Figure 9 The circuit board assembly is a single circuit board. The front side of the circuit board is the first sensing surface 101, and the back side of the circuit board is the second sensing surface 102. The sensing area is circular.

[0021] In specific embodiments one to six, the shape and size of the sensor 20 are selected and arranged according to the surface area corresponding to the sensor designed on the circuit board; Preferably, the sensors 20 on the same circuit board assembly 10 have the same shape and size, and the spacing between all sensors 20 on different surfaces is the same.

[0022] Sensors are arranged on both surfaces of the circuit board assembly, and the common terminal and signal output terminal of the sensors in each column of the same sensing surface are placed on the same side of the width direction. This makes it easy to connect the common line. Because the adjacent sensors are arranged at intervals, the signal output terminal of each sensor can be connected to the signal transmission line through an independent line. The two sets of sensor arrays are set independently for different surface areas, which makes the sensor arrangement convenient and reliable. It can make the sensor arrangement relatively dense without affecting the circuit layout, thereby ensuring accurate and reliable foreign object detection.

[0023] 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.

[0024] 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 its wiring structure for a wireless charging foreign object detection device, characterized in that, It includes: The circuit board assembly includes a first sensing surface and a second sensing surface, each sensing surface including a sensing area and a line transmission end; And several sensors; Two sets of sensor arrays are arranged in the sensing areas of the two sensing surfaces of the circuit board assembly. The sensors in each sensor array are arranged in several columns along the width of the sensing area of ​​the first or second sensing surface. Each sensor group is arranged from top to bottom at intervals corresponding to its width position, with gaps between adjacent sensors. The two columns of sensor groups of different sensing surfaces are combined to form an overall sensor array. The sensors of different sensing surfaces fill the gaps between adjacent sensors on the other sensing surface. Each sensing surface has a common line and a signal transmission cable at its line transmission end. The common line is connected to the common end of each sensor arranged on the same surface in series and parallel through lead-out lines arranged on the same surface. The signal output end of each sensor arranged on the same surface is connected to the corresponding signal transmission cable arranged on the same surface through an independent line.

2. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 1, characterized in that: When the circuit board assembly is a single circuit board, the front side of the circuit board is the first sensing surface, and the back side of the circuit board is the second sensing surface.

3. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 1, characterized in that: When the circuit board assembly consists of two stacked circuit boards, it includes a first circuit board and a second circuit board. The upper surface of the first circuit board is a first sensing surface, and the upper surface of the second circuit board is a second sensing surface. The first circuit board has a first clearance hole corresponding to the position of the sensor on the second circuit board, and the second circuit board has a second clearance hole corresponding to the position of the sensor on the first circuit board.

4. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 2 or 3, characterized in that: The number of signal transmission cables on each sensing surface is equal to the number of sensors.

5. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 4, characterized in that: On the same sensing surface, the common end of all sensors in the same row of sensor groups is located on one side of the width direction, while the signal output end is located on the other side of the width direction.

6. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 1, characterized in that: The common line is located on one or both sides of the line transmission end in the width direction, and the signal transmission cable is arranged in the remaining area excluding the common line.

7. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 6, characterized in that: The common line is located on both sides of the line transmission end in the width direction. The common line on each side is connected to the common end of the sensor of the corresponding column sensor group it covers through the common line bus and common line branch line on the corresponding side.

8. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 7, characterized in that: The common line is connected to the common terminal at the outer position of the sensor group in the corresponding column located on both sides through the common line bus on both sides and several first branch lines respectively.

9. The sensor and wiring structure of the wireless charging foreign object detection device according to claim 8, characterized in that: When a sensor group is also installed inside the side sensor group, the common bus on one or both sides is connected to the branch bus located inside the side via a bypass second branch line as needed. The branch return bus is directly connected to the common terminal of each sensor in the inside sensor group, or the branch return bus is connected to the common terminal of each sensor in the inside sensor group via several third branch lines.

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