Automobile seat pressure sensor
By setting up a front and rear dual-zone coordinated triggering mechanism on the car seat to identify the typical pressure distribution of adults, the problem of children accidentally starting the vehicle in existing technologies is solved, thus improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-07
AI Technical Summary
Existing car seat pressure sensors cannot identify pressure distribution characteristics, leading to the risk of children accidentally starting the vehicle, posing a safety hazard.
It adopts a dual-zone collaborative triggering mechanism with front and rear settings. By working together, the front and rear areas of the seat are defined, and the start signal is output simultaneously only when adults are in typical positions, to prevent children from accidentally operating the seat.
It effectively prevents children from accidentally starting the car, improves vehicle safety, and avoids potential accidents caused by children's accidental operation.
Smart Images
Figure CN224090041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive electronics technology, and in particular to an automotive seat pressure sensor. Background Technology
[0002] The car seat pressure sensor is a thin-film contact sensor. When the seat is pressed, the upper and lower circuit layers of the sensor make contact and complete the conduction circuit, triggering an alarm signal.
[0003] Currently, automotive seat pressure sensors are mainly used in vehicle safety systems to detect the presence and weight distribution of occupants to prevent accidental airbag triggering or optimize seat comfort adjustments. However, existing single-point or single-area pressure detection technologies only detect pressure values in a single area and cannot identify pressure distribution characteristics. This can lead to the system misidentifying children or heavy objects as valid occupants, posing a risk of children accidentally starting the vehicle (accidents involving children accidentally starting vehicles are not uncommon). Therefore, this invention provides an automotive seat pressure sensor to address the problems mentioned in the background section. Utility Model Content
[0004] The purpose of this invention is to provide a car seat pressure sensor. Through a dual-zone coordinated triggering mechanism set at the front and rear, and in conjunction with the set pressure sensor, if the pressure distribution does not meet the preset conditions, the trigger switch remains open, and the ECU module does not output a start signal, which can prevent children from accidentally starting the car.
[0005] To achieve the above objectives, an automotive seat pressure sensor is provided, comprising a front sensing area and a rear sensing area, wherein the front sensing area and the rear sensing area are spaced apart and have identical structures.
[0006] The front sensing area includes a central electric shock sensor array, two side electric shock sensor arrays symmetrically arranged on both sides of the central electric shock sensor array, a second conductive strip connecting the two side electric shock sensor arrays, and a first conductive strip connecting the central electric shock sensor array and the second conductive strip.
[0007] It also includes a signal input circuit and a second signal output circuit. The signal input circuit, the second conductive strip of the front sensing area, the second conductive strip of the rear sensing area and the second signal output circuit are connected in series. The output terminal of the second signal output circuit is connected to a pressure sensing control circuit.
[0008] According to the aforementioned automotive seat pressure sensor, the pressure sensing control circuit includes pressure sensing plates symmetrically arranged between the front sensing area and the rear sensing area, a connecting plate connecting the two pressure sensing plates, a pressure sensor installed at the bottom of the connecting plate, and a trigger switch connected to the output terminal of the second signal output circuit.
[0009] According to the aforementioned automotive seat pressure sensor, two second conductive strips are connected by a connecting conductive strip, the signal input circuit is connected to the second conductive strip in the front sensing area, and the second signal output circuit is connected to the second conductive strip in the rear sensing area.
[0010] According to the aforementioned automotive seat pressure sensor, it further includes an ECU module, and the output terminal of the trigger switch is connected to a first signal output circuit, which is connected to the ECU module.
[0011] According to the aforementioned automotive seat pressure sensor, a signal processing module is also included, wherein the output terminal of the pressure sensor is connected to the signal processing module, and the input terminal of the trigger switch is connected to the signal processing module.
[0012] According to the aforementioned automotive seat pressure sensor, the signal processing module includes an amplifier circuit and an AD converter.
[0013] According to the aforementioned automotive seat pressure sensor, both the central contact sensor array and the side contact sensor array are thin-film contact sensors, and both the central contact sensor array and the side contact sensor array have a silicone protective layer on their surfaces.
[0014] According to the aforementioned automotive seat pressure sensor, both the first conductive strip and the second conductive strip have an insulating layer on their surfaces.
[0015] This utility model has the following beneficial effects:
[0016] 1. Compared with existing technologies, the dual-zone collaborative triggering mechanism, which is set at the front and rear, defines the front of the seat as the front sensing zone and the rear as the rear sensing zone. The start signal can only be output when the front sensing zone and the rear sensing zone are connected at the same time. In addition, the pressure sensor is set to detect the pressure applied by the driver on the seat. If the pressure distribution does not meet the preset conditions (such as insufficient pressure due to the weight of the child), the trigger switch remains open and the ECU module does not output the start signal, which can prevent the child from accidentally starting the car. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0018] Figure 1 This is a schematic diagram of the first layout structure of an automotive seat pressure sensor according to the present invention;
[0019] Figure 2 This utility model relates to a car seat pressure sensor. Figure 1 Another perspective structural diagram;
[0020] Figure 3This is a schematic diagram of the integrated circuit structure between the pressure sensor, signal processing module, and trigger switch of an automotive seat pressure sensor according to this utility model.
[0021] Figure 4 This is a schematic diagram of the overall circuit structure of an automotive seat pressure sensor according to the present invention.
[0022] Legend:
[0023] 1. Front sensing area; 2. Rear sensing area; 3. Central contact sensor array; 4. Side contact sensor array; 5. First conductive strip; 6. Second conductive strip; 7. Signal input circuit; 8. Connecting conductive strip; 9. Trigger switch; 10. First signal output circuit; 11. Pressure sensing plate; 12. Connecting plate; 13. Pressure sensor; 14. Second signal output circuit; 15. Signal processing module; 16. Amplifier circuit; 17. AD converter; 18. ECU module. Detailed Implementation
[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0025] Reference Figure 1-4 This utility model provides an automotive seat pressure sensor, which includes a front sensing area 1, a rear sensing area 2, a signal input circuit 7, a second signal output circuit 14, an ECU module 18, and a signal processing module 15. The front sensing area 1 and the rear sensing area 2 are spaced apart and have the same structure. The front sensing area 1 includes a central contact sensor array 3, two side contact sensor arrays 4 symmetrically arranged on both sides of the central contact sensor array 3, a second conductive strip 6 connecting the two side contact sensor arrays 4, and a first conductive strip 5 connecting the central contact sensor array 3 and the second conductive strip 6.
[0026] The occupant's seating pressure first acts on the sensor arrays in the front sensing area 1 and the rear sensing area 2, causing the thin-film contacts to conduct and closing the circuit of the second conductive strip 6. When the switch signal is input from the signal input circuit 7, it is transmitted through the second conductive strip 6, the connecting conductive strip 8, and the second conductive strip 6 in the rear sensing area 2. Finally, the signal is output to the pressure sensing control circuit by the second signal output circuit 14.
[0027] The dual-zone coordinated triggering mechanism, with the front of the seat designated as the front sensing zone 1 and the rear as the rear sensing zone 2, requires simultaneous connection between both zones (typically adults, whose pressure zones are larger than children's, and children's smaller bodies are insufficient to trigger the rear sensing zone 2) to output a start signal. Furthermore, the side contact sensor array 4 and the central contact sensor array 3 must be triggered synchronously to establish circuit connection for the second conductive strip 6. An adult's body width can trigger the side sensors, while a child's body width only triggers the central sensor, failing to establish connection for the second conductive strip 6. Consequently, the car start signal input to the signal input circuit 7 cannot be output subsequently.
[0028] The signal input circuit 7, the second conductive strip 6 of the front sensing area 1, the second conductive strip 6 of the rear sensing area 2, and the second signal output circuit 14 are connected in series. The two second conductive strips 6 are connected by a connecting conductive strip 8. The signal input circuit 7 is connected to the second conductive strip 6 of the front sensing area 1, and the second signal output circuit 14 is connected to the second conductive strip 6 of the rear sensing area 2. The output terminal of the second signal output circuit 14 is connected to a pressure sensing control circuit. The pressure sensing control circuit includes pressure sensing plates 11 symmetrically arranged between the front sensing area 1 and the rear sensing area 2, a connecting plate 12 connecting the two pressure sensing plates 11, a pressure sensor 13 installed at the bottom of the connecting plate 12, and a trigger switch 9 connected to the output terminal of the second signal output circuit 14.
[0029] Pressure sensor 13 is used to detect the pressure applied by the driver on the seat. When the pressure reaches a preset threshold (e.g., typical adult weight ≥ 40kg), trigger switch 9 closes, and the switch signal is transmitted to ECU module 18 via first signal output circuit 10. If the pressure distribution does not meet the preset conditions (e.g., insufficient pressure due to child weight), trigger switch 9 remains open, and ECU module 18 does not output a start signal to prevent accidental operation by the child.
[0030] The output of trigger switch 9 is connected to a first signal output circuit 10, which is connected to the ECU module 18. The switch signal is output to the ECU module 18 via the first signal output circuit 10, and only then will the ECU module 18 allow the vehicle to start. The output of pressure sensor 13 is connected to signal processing module 15, and the input of trigger switch 9 is connected to signal processing module 15. Signal processing module 15 includes an amplifier circuit 16 and an AD converter 17. The analog signal output by pressure sensor 13 is input to signal processing module 15, and after being conditioned by amplifier circuit 16, it is converted into a digital signal by AD converter 17.
[0031] Both the central contact sensor array 3 and the side contact sensor array 4 are thin-film contact sensors, and both have a silicone protective layer on their surfaces to improve wear resistance and water resistance. The first conductive strip 5 and the second conductive strip 6 both have an insulating layer on their surfaces to protect them.
[0032] Working principle: A dual-zone collaborative triggering mechanism is set up, with the front of the seat defined as the front sensing zone 1 and the rear as the rear sensing zone 2. Both the front sensing zone 1 and the rear sensing zone 2 must be connected simultaneously (typically for adults, where the pressure area occupied by an adult is larger than that occupied by a child, and a child's smaller body is insufficient to trigger the rear sensing zone 2) to output a start signal. Furthermore, the side contact sensor array 4 and the central contact sensor array 3 must be triggered synchronously to achieve circuit connection of the second conductive strip 6. An adult's body width can trigger the side sensors, but a child's body width only triggers the central sensor, failing to achieve connection of the second conductive strip 6. Consequently, the car start signal input circuit 7 cannot output subsequently.
[0033] Pressure sensor 13 is used to detect the pressure applied by the driver on the seat. When the pressure reaches a preset threshold (e.g., typical adult weight ≥ 40kg), trigger switch 9 closes, and the switch signal is transmitted to ECU module 18 via first signal output circuit 10. If the pressure distribution does not meet the preset conditions (e.g., insufficient pressure due to child weight), trigger switch 9 remains open, and ECU module 18 does not output a start signal to prevent accidental operation by the child.
[0034] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A car seat pressure sensor, characterized in that, It includes a front sensing area (1) and a rear sensing area (2), wherein the front sensing area (1) and the rear sensing area (2) are spaced apart and have the same structure; The front sensing area (1) includes a central electric shock sensor array (3), two side electric shock sensor arrays (4) symmetrically arranged on both sides of the central electric shock sensor array (3), a second conductive strip (6) connecting the two side electric shock sensor arrays (4), and a first conductive strip (5) connecting the central electric shock sensor array (3) and the second conductive strip (6). It also includes a signal input circuit (7) and a second signal output circuit (14). The signal input circuit (7), the second conductive strip (6) of the front sensing area (1), the second conductive strip (6) of the rear sensing area (2) and the second signal output circuit (14) are connected in series. The output terminal of the second signal output circuit (14) is connected to a pressure sensing control circuit.
2. The automotive seat pressure sensor according to claim 1, characterized in that, The pressure sensing control circuit includes a pressure sensing plate (11) symmetrically arranged between the front sensing area (1) and the rear sensing area (2), a connecting plate (12) connecting the two pressure sensing plates (11), a pressure sensor (13) installed at the bottom of the connecting plate (12), and a trigger switch (9) connected to the output end of the second signal output circuit (14).
3. The automotive seat pressure sensor according to claim 2, characterized in that, The two second conductive strips (6) are connected by a connecting conductive strip (8), the signal input circuit (7) is connected to the second conductive strip (6) of the front sensing area (1), and the second signal output circuit (14) is connected to the second conductive strip (6) of the rear sensing area (2).
4. A car seat pressure sensor according to claim 3, characterized in that, It also includes an ECU module (18), and the output terminal of the trigger switch (9) is connected to a first signal output circuit (10), which is connected to the ECU module (18).
5. A car seat pressure sensor according to claim 4, characterized in that, It also includes a signal processing module (15), the output of the pressure sensor (13) is connected to the signal processing module (15), and the input of the trigger switch (9) is connected to the signal processing module (15).
6. A car seat pressure sensor according to claim 5, characterized in that, The signal processing module (15) includes an amplifier circuit (16) and an AD converter (17).
7. A car seat pressure sensor according to claim 1, characterized in that, Both the central contact sensor array (3) and the side contact sensor array (4) are thin-film contact sensors, and both the central contact sensor array (3) and the side contact sensor array (4) have a silicone protective layer on their surfaces.
8. A car seat pressure sensor according to claim 7, characterized in that, Both the first conductive strip (5) and the second conductive strip (6) have an insulating layer on their surfaces.