Capacitive pad body device with electrically erasable read-only memory

Abstract

The utility model provides a capacitive pad body device with an electrically erasable read-only memory, which comprises a sensor pad body, and the sensor pad body comprises a base material and a conductive layer arranged on the base material; the wire harness assembly is used for connecting the conductive layer of the sensor pad body and the ECU; the electrically erasable read-only memory is connected with the wire harness assembly, information stored in the electrically erasable read-only memory comprises sensor pad body information, and the ECU can read the sensor pad body information. Compared with the prior art, information such as parameters, models and the like of the sensor pad body is stored through the electrically erasable read-only memory, and the information can be read by the ECU. When the capacitive sensor is used in cooperation with different requirements, the ECU used in cooperation with the capacitive sensor can directly obtain the information of the capacitive sensor, and the adaptability of the capacitive sensor and ECU programs is improved. In addition, the situation that the paper label written with the sensor pad body information is limited in area and easy to damage is avoided, and the stability of obtaining the sensor pad body information is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a capacitive pad device with an electrically erasable read-only memory. Background Art

[0002] Currently, the capacitive sensor devices for automobile steering wheels and seats include a pad part and a wiring harness part. Generally, a label is set at a designated position on the wiring harness or on the pad. Information such as electrical parameters, product production number, batch number, etc. is usually on a paper label.

[0003] However, the area of ​​paper labels is limited, the information that can be reflected is limited, and paper labels are easily damaged. When pad information is needed, it is often impossible to obtain relevant information about the pad, which makes it difficult to trace the source of the pad. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a capacitive pad device with an electrically erasable read-only memory, which can be applied to a car seat or a steering wheel, comprising:

[0005] A sensor pad, the sensor pad comprising a substrate and a conductive layer disposed on the substrate;

[0006] A wiring harness assembly, the wiring harness assembly is used to connect the conductive layer of the sensor pad with the ECU;

[0007] An electrically erasable read-only memory is connected to the wiring harness assembly, information stored in the electrically erasable read-only memory includes sensor pad information, and the ECU can read the sensor pad information.

[0008] According to the technical solution provided in the embodiment of the present application, the electrically erasable read-only memory is arranged on the wiring harness assembly.

[0009] According to the technical solution provided in the embodiment of the present application, the electrically erasable read-only memory is disposed on the sensor pad, and the electrically erasable read-only memory is disposed on the conductive layer or on the substrate.

[0010] According to the technical solution provided in the embodiment of the present application, the wiring harness assembly is a first wiring harness, and the first wiring harness has a wire connecting the electrically erasable read-only memory and the ECU; the electrically erasable read-only memory can be integrated on the first wiring harness, or be arranged on a circuit board connected to the first wiring harness.

[0011] According to the technical solution provided in the embodiment of the present application, the wiring harness assembly includes the first wiring harness and the second wiring harness, the first wiring harness connects the conductive layer and the ECU, and the second wiring harness connects the electrically erasable read-only memory and the ECU.

[0012] According to the technical solution provided in the embodiment of the present application, the wiring harness assembly is an IIC bus or a SPI bus.

[0013] According to the technical solution provided in the embodiment of the present application, the electrically erasable read-only memory is provided with an insulating shell outside, and the insulating shell is provided with at least one opening for connection with the wiring harness assembly.

[0014] According to the technical solution provided in the embodiment of the present application, the information stored in the electrically erasable read-only memory includes static information, and the static information includes the electrical parameters and product code of the sensor pad, and the static information cannot be deleted.

[0015] According to the technical solution provided in the embodiment of the present application, the information stored in the electrically erasable read-only memory also includes dynamic information, and the dynamic information includes the capacitance value of the sensor pad or fault diagnosis and snapshot information during the operation of the car, mileage or duration information, or personalized parameter information set by the customer, and the dynamic information can be erased.

[0016] According to the technical solution provided in the embodiment of the present application, the electrically erasable read-only memory can also store operating status information of components other than the sensor pad.

[0017] According to the technical solution provided in the embodiment of the present application, for different usage scenarios of the sensor pad, the ECU can match its internal program according to the storage information of the erasable read-only memory, so that the internal program automatically adapts to the usage scenario; or, the ECU can compare its own storage information with the storage information of the erasable read-only memory it reads, and issue an alarm when a match cannot be made.

[0018] In summary, the present application proposes a capacitive pad device with an electrically erasable read-only memory, including a sensor pad, the sensor pad including a substrate and a conductive layer disposed on the substrate; a wiring harness assembly is used to connect the conductive layer of the sensor pad with the ECU; the electrically erasable read-only memory is connected to the wiring harness assembly, the information stored in the electrically erasable read-only memory includes sensor pad information, and the ECU can read the sensor pad information. Compared with the prior art, the present application stores sensor pad information through an electrically erasable read-only memory, and the ECU can read the information, thereby avoiding the situation where the paper label with the sensor pad information is limited in area and easy to be damaged, and improving the stability of obtaining the sensor pad information. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a capacitive pad device with an electrically erasable read-only memory (the electrically erasable read-only memory is provided on a wiring harness assembly) provided in an embodiment of the present application;

[0020] Figure 2 A capacitive pad device with an electrically erasable read-only memory provided in an embodiment of the present application (the electrically erasable read-only memory is provided on the sensor pad);

[0021] Figure 3 A circuit diagram of a capacitive pad device with an electrically erasable read-only memory provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a structure in which a capacitive pad device with an electrically erasable read-only memory provided in an embodiment of the present application is connected to an ECU.

[0023] 1. sensor pad; 11. substrate; 12. conductive layer; 2. first wiring harness; 3. electrically erasable read-only memory; 4. second wiring harness; 5. connector; 6. NTC; 61. third wiring harness; 7. ECU. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] As mentioned in the background technology, the present application proposes a capacitive pad device with an electrically erasable read-only memory, which can be applied to a car seat or a steering wheel, including:

[0027] A sensor pad 1, wherein the sensor pad 1 comprises a substrate 11 and a conductive layer 12 disposed on the substrate 11;

[0028] A wiring harness assembly, the wiring harness assembly is used to connect the conductive layer 12 of the sensor pad 1 with the ECU 7;

[0029] An electrically erasable read-only memory 3 is connected to the wiring harness assembly. Information stored in the electrically erasable read-only memory 3 includes sensor pad information, and the ECU 7 can read the sensor pad information.

[0030] The ECU7 (Electronic Control Unit) is also called "driving computer", "on-board computer", etc. It is a microcomputer controller for automobiles, also called a single-chip microcomputer for automobiles. Like ordinary single-chip microcomputers, it is composed of a microprocessor (CPU), memory (ROM, RAM), input / output interface (I / O), analog-to-digital converter (A / D), and large-scale integrated circuits such as shaping and driving. It can be one electronic control unit or two or more electronic control units.

[0031] Optionally, the EEPROM 3 may be a common model such as AT24C series or AT21CS01 or M24128-A125, 24AA256, etc. Before the product leaves the factory, the sensor pad information is pre-written into the EEPROM 3 by writing a program, and the ECU 7 can directly read the data stored in the EEPROM 3 and read or work according to the corresponding data.

[0032] Compared with the prior art, the present application stores the sensor pad information through the electrically erasable read-only memory 3, and the ECU 7 can read the information, thereby avoiding the situation where the paper label with the sensor pad information is limited in area and easy to be damaged, and improving the stability of obtaining the sensor pad information.

[0033] In addition, for car seats or steering wheels, the surface materials and structures of different configurations are also different. For capacitive sensor products, the detection results will be affected by the different materials and structures, so the programs and stored calibration structures of related ECU products are also different. During production, when the same functional sensor pad and ECU are used in steering wheels or seats of different materials and structures, multiple models and types will be divided. The traditional method of identification is through paper labels, which is inefficient due to the wide variety of types.

[0034] Therefore, the ECU7 in the present application reads the sensor pad information and automatically matches it with the program inside the ECU7, thereby achieving the technical effect of improving the adaptability of the ECU7 and the sensor pad 1 when the seat or steering wheel is used in different scenarios.

[0035] In a preferred embodiment, the wiring harness assembly may be an IIC bus or a SPI bus.

[0036] Among them, IIC (Inter-Integrated Circuit) bus and SPI (Serial Peripheral Interface) are both serial communication buses. In addition, it can also be a single wire bus, which is also a serial communication bus. Furthermore, SPI bus is the most commonly used method.

[0037] In a preferred embodiment, the electrically erasable read-only memory 3 is disposed on the wiring harness assembly. Figure 1 As shown; the electrically erasable read-only memory 3 may also be connected to the wires and then wrapped with insulating material or protective material together with the wires of the wiring harness assembly, so that the appearance looks like a wiring harness and there will be no Figure 1 The wiring harness branches in .

[0038] In a preferred embodiment, the EEPROM 3 is disposed on the sensor pad 1, and the EEPROM 3 is disposed on the conductive layer 12 or on the substrate 11. Figure 2 Specifically, the EEPROM 3 can be connected to the substrate 11 by gluing.

[0039] Further, Figure 4 Also shown is a plurality of capacitive pads with electrically erasable read-only memory proposed in the present application connected to one of the ECUs 7.

[0040] In a preferred embodiment, the wiring harness assembly is a first wiring harness 2, and the first wiring harness 2 has a wire connecting the electrically erasable read-only memory 3 and the ECU 7; the electrically erasable read-only memory 3 can be integrated on the first wiring harness 2, or be arranged on a circuit board connected to the first wiring harness 2.

[0041] Specifically, this embodiment proposes a situation where there is only one wiring harness. When the wiring harness assembly has only one wiring harness, the electrically erasable read-only memory 3 can be directly arranged on the first wiring harness 2, or it can be first arranged on a circuit board, and then the circuit board is connected to the first wiring harness 2 by welding or terminal connection (not limited to these methods).

[0042] Furthermore, since the first wiring harness 2 is powered, an insulating structure needs to be provided between the EEPROM 3 integrated on the first wiring harness 2 and the first wiring harness 2 , and the insulating structure may be an insulating shell having an insulating function.

[0043] In a preferred embodiment, the wiring harness assembly includes the first wiring harness 2 and the second wiring harness 4 , the first wiring harness 2 connects the conductive layer 12 with the ECU 7 , and the second wiring harness 4 connects the EEPROM 3 with the ECU 7 .

[0044] Among them, please refer to Figure 1 As shown, the conductive layer 12 may be a metal wire arranged in a winding manner on the substrate 11, and the metal wire is connected to the first wiring harness 2 by welding or terminals; it may also be a metal cloth laid on the substrate 11, and the metal cloth may be connected to the first wiring harness 2 through terminals or metal foil; when the EEPROM 3 is integrated on the first wiring harness 2, the EEPROM 3 is electrically connected to the ECU 7 through the first wiring harness 2, and when the EEPROM 3 is arranged on the sensor pad 1, it is connected to the ECU 7 through the second wiring harness 4, and the second wiring harness 4 may be integrated into one wiring harness with the first wiring harness 2 through a connector.

[0045] The EEPROM 3 is disposed on a circuit board and is electrically connected to the second wiring harness 4 via the circuit board. The circuit board and the second wiring harness 4 may be connected by welding or terminal connection, but are not limited to this method. The circuit board and the substrate 11 may be fixed by gluing, but are not limited to this method.

[0046] In a preferred embodiment, the electrically erasable read-only memory 3 is provided with an insulating shell, and the insulating shell is provided with at least one opening for connecting with a wiring harness assembly.

[0047] When the EEPROM 3 is also disposed on the conductive layer 12 via a circuit board, an insulating structure is disposed between the circuit board and the conductive layer 12 .

[0048] Among them, optionally, the insulating structure is an insulating shell arranged outside the circuit board. When the electrically erasable read-only memory 3 is arranged on the conductive layer 12, the insulating shell and the conductive layer 12 can be fixed by gluing. When the electrically erasable read-only memory 3 is integrated on the first wiring harness 2, the electrically erasable read-only memory 3 can be bundled with the first wiring harness 2 by insulating tape.

[0049] Furthermore, the electrically erasable read-only memory 3 is arranged on a circuit board, and can also be arranged in the insulating shell. A pin terminal is arranged on the circuit board, and is connected to the wire of the wiring harness assembly through a shell connector, or the wire is first connected to the circuit board, and a part of the wire is exposed outside the insulating shell, and then the wire is connected to the wiring harness assembly through welding, or a connector 5 is arranged at the end of the exposed wire, and the connection with the wiring harness assembly is achieved through the connector 5.

[0050] Furthermore, the end of the wiring harness assembly away from the sensor pad 1 is connected with the connector 5, and is connected to the ECU 7 through the connector 5; in addition, a reader is provided between the ECU 7 and the connector 5, the reader is connected to the connector 5, and a display screen is configured on the reader, and the display screen can visually display the information read from the electrically erasable read-only memory 3. The end of the reader away from the connector 5 is provided with an external interface, and is connected to the ECU 7 through the external interface, for transmitting the acquired information to the ECU 7.

[0051] In a preferred embodiment, the information stored in the electrically erasable read-only memory 3 includes static information, and the static information includes electrical parameters and product codes of the sensor pad 1 , and the static information cannot be deleted.

[0052] In a preferred embodiment, the information stored in the electrically erasable read-only memory 3 also includes dynamic information, which includes the capacitance value of the pad or fault diagnosis and snapshot information during the operation of the car, mileage or duration information, or personalized parameter information set by the customer, and the dynamic information is erasable.

[0053] Specifically, the ECU7 can communicate with the electrically erasable read-only memory 3, and the ECU7 stores the specific dynamic information read into the electrically erasable read-only memory 3, wherein the ECU7 can be one electronic control unit or two or more electronic control units.

[0054] Furthermore, the ECU7 may be one or more ECUs that can establish a communication relationship with the electrically erasable read-only memory 3, may refer to an electronic control unit that directly controls the operation of the sensor pad device, may include electronic control units of other pads, and may also include electronic control units with other control functions.

[0055] Specifically, the dynamic information can be erased, including the capacitance value of the sensor pad 1 or fault diagnosis and snapshot information (for example, the real-time capacitance value of the pad is recorded when the vehicle is running) or mileage or duration information, personalized parameter information set by the customer, etc.

[0056] Furthermore, the erasing rule can be based on the storage capacity. When the storage is full, the erasing is performed according to the minimum erasable unit size, and the unit with the earliest time in the entire device is erased, and the process is continued. Optionally, the minimum erasable unit is 1 page.

[0057] Furthermore, the erasure rule can also be calculated according to the time period, based on the content, the amount of data generated in real time, etc., to estimate the time period for full storage, and then erase the earliest smallest unit storage information after the time period is reached.

[0058] In a preferred embodiment, the EEPROM 3 can also store the operating status information of components other than the sensor pad 1 .

[0059] The EEPROM 3 also stores the production date, production address and production line number of the sensor pad 1. Optionally, the metal wire is a heating sensor, and the EEPROM 3 can also store the resistance value of the heating sensor and the set heating level temperature threshold; please refer to Figure 3 As shown, the conductive layer 12 is provided with NTC6 (Negative Temperature Coefficient, thermistor), and the NTC6 is connected to the first harness 2 through the third harness 61, and the EEPROM 3 also stores relevant information of the NTC6. In addition, the EEPROM 3 can also store the sitting posture, the seat belt use status, the sensor airbag status, etc.

[0060] In a preferred embodiment, for different usage scenarios of the sensor pad 1, the ECU 7 can match its internal program according to the storage information of the erasable read-only memory 3 so that the internal program automatically adapts to the usage scenario; or, the ECU 7 can compare its own storage information with the storage information of the erasable read-only memory 3 it reads, and issue an alarm when a match cannot be made.

[0061] Furthermore, the ECU 7 can match its internal program according to the information stored in the erasable read-only memory 3 , and automatically adapt to different usage scenarios of the sensor pad 1 , thereby improving the compatibility of the ECU 7 and the sensor pad 1 .

[0062] Furthermore, the ECU 7 may also compare the read information with the information stored inside the ECU 7, and when a match cannot be made, the ECU 7 may issue an alarm.

[0063] Specifically, the alarm is issued through LIN / CAN bus information or light and sound.

[0064] In the traditional method, different configurations correspond to different programs and different ECU modules. The same car has different configurations and different ECU modules, which is not conducive to management and the difference is not very large. In this application, programs of various states can be set in one ECU module, and program optimization can also be performed. In a specific scenario, the seat sensor pad is placed inside the seat. When the seat configuration is leather or fabric or other materials or different states with a large thickness difference, the corresponding recognition program for detecting human body occupancy of the seat is different. Using the traditional method, different ECU modules are required for different materials and thicknesses. The present application matches the information stored in the electrically erasable read-only memory 3 identified by the ECU7 to obtain the corresponding control program. If the information stored in the ECU7 does not match the information read by the ECU7 from the electrically erasable read-only memory 3, an alarm is issued through LIN / CAN bus information or light and sound.

[0065] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A capacitive pad device with an electrically erasable read-only memory, which can be applied to a car seat or a steering wheel, characterized in that: include: A sensor pad (1), the sensor pad (1) comprising a substrate (11) and a conductive layer (12) provided on the substrate (11); A wiring harness assembly, the wiring harness assembly being used to connect the conductive layer (12) of the sensor pad (1) and the ECU (7); An electrically erasable read-only memory (3) is connected to the wiring harness assembly, the information stored in the electrically erasable read-only memory (3) includes sensor pad information, and the ECU (7) can read the sensor pad information.

2. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: The electrically erasable read-only memory (3) is arranged on the wiring harness assembly.

3. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: The electrically erasable read-only memory (3) is arranged on the sensor pad (1); the electrically erasable read-only memory (3) is arranged on the conductive layer (12) or on the substrate (11).

4. The capacitive pad device with electrically erasable read-only memory according to claim 2 or 3, characterized in that: The electrically erasable read-only memory (3) is provided with an insulating shell outside, and the insulating shell is provided with at least one opening for connection with the wiring harness assembly.

5. The capacitive pad device with electrically erasable read-only memory according to claim 4, characterized in that: The wiring harness assembly is a first wiring harness (2), wherein the first wiring harness (2) has a wire connecting the electrically erasable read-only memory (3) and the ECU (7); the electrically erasable read-only memory (3) can be integrated on the first wiring harness (2), or arranged on a circuit board connected to the first wiring harness (2).

6. The capacitive pad device with electrically erasable read-only memory according to claim 5, characterized in that: The wiring harness assembly comprises the first wiring harness (2) and the second wiring harness (4), wherein the first wiring harness (2) connects the conductive layer (12) with the ECU (7), and the second wiring harness (4) connects the electrically erasable read-only memory (3) with the ECU (7).

7. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: The information stored in the electrically erasable read-only memory (3) includes static information, wherein the static information includes electrical parameters and product codes of the sensor pad (1), and the static information cannot be deleted.

8. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: The information stored in the electrically erasable read-only memory (3) also includes dynamic information, which includes the capacitance value of the sensor pad (1) or fault diagnosis and snapshot information during vehicle operation, mileage or duration information, or personalized parameter information set by a customer, and the dynamic information is erasable.

9. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: The electrically erasable read-only memory (3) can also store operating status information of components other than the sensor pad body (1).

10. The capacitive pad device with electrically erasable read-only memory according to claim 1, characterized in that: For different usage scenarios of the sensor pad (1), the ECU (7) can match its internal program according to the storage information of the erasable read-only memory (3), so that the internal program automatically adapts to the usage scenario; or, the ECU (7) can compare its own storage information with the storage information of the erasable read-only memory (3) it reads, and issue an alarm when no match is found.

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