A seat occupant body classification recognition sensor system and automobile seat

Abstract

The present application discloses a seat occupant body classification recognition sensor system and a car seat. The system comprises: a sensor module and an electronic controller for use in conjunction; the present application utilizes the force-facing surface of the first material surface layer of the laminated body on the laminated sensing part, the through-holes of the spacer layer and the second material surface layer to form a sensing cavity; when the sensing point group and the sensing cavity are subjected to external pressure, the sensing cavity forms an air pressure change inside the closed space, and the air pressure change is transmitted to the electronic controller through the air path channel; the first air pressure sensor determines the difference in body weight of different occupants through the pressure value change of the sensor module; the air pressure value is subjected to signal processing and judgment by a program, and then the weight range of the human body on the seat is determined; and the second air pressure sensor is connected to the interior space of the cabin to monitor the atmospheric pressure value of the interior space of the vehicle cabin, so that the electronic controller can better correct the detection value of the first air pressure sensor to achieve a more accurate signal processing result.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of seat occupant body classification, and in particular to a seat occupant body classification recognition sensor system and a car seat. Background Art

[0002] Most vehicles include airbags and a seat belt restraint system that works in conjunction with them to protect the driver and passengers from serious injuries in high-speed collisions. It is important to control the airbag expansion force and seat belt pretension according to the size of the driver or passenger.

[0003] At present, the existing seat occupant body shape classification, for example, utilizes the measurement of current, impedance or capacitance value to determine the existence of objects on the seat and classify the objects; however, the existing seats cannot identify and detect the existence and weight of the seat occupants due to the SBR or BodySensors sensing pad on the A side inside the seat cushion, which has no circuit sensing points and no ventilation holes; therefore, the existing seat occupant body classification and recognition system urgently needs to be improved. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a seat occupant body classification recognition sensor system and a car seat that can accurately recognize the presence of occupants and classify them, and has a simple structure and is easy to implement.

[0005] In a first aspect, the present application provides a seat occupant body classification recognition sensor system, comprising: a sensor module and an electronic controller used in conjunction;

[0006] The sensing module comprises: a stacked sensing part and at least one sensing point group arranged on the stacked sensing part; the stacked sensing part is provided with a stacked body; the stacked body comprises: a first material surface layer, a spacer layer and a second material surface layer which are sequentially arranged from top to bottom; the spacer layer is provided with a plurality of through holes and at least one air path channel; the through holes and the first material surface layer and the second material surface layer form air pressure sensing points, and the air pressure sensing points are connected with the air path channel; the air path channel is connected with the electronic controller; the sensing point group comprises: at least one air pressure sensing point and at least one air path channel;

[0007] The electronic controller comprises: at least one first air pressure sensor in communication with the air channel; one of the sensing point groups corresponds to at least one of the first air pressure sensors;

[0008] The electronic controller is configured to: obtain a first air pressure value P detected by the first air pressure sensor a The first air pressure value P aCompare with the standard setting value, and then judge and output the occupant's body type information.

[0009] According to the technical solution provided in the embodiment of the present application, the standard setting value includes a first threshold value P1, a second threshold value P2, a third threshold value P3, a fourth threshold value P4 and a fifth threshold value P5;

[0010] When the first air pressure value P a When the vehicle is less than or equal to the first threshold value P1, the electronic controller outputs information that no one is riding.

[0011] When the first air pressure value P a When it is greater than the first threshold value P1 and less than the second threshold value P2, the electronic controller outputs the occupancy information;

[0012] When the first air pressure value P a When it is greater than the second threshold value P2 and less than the third threshold value P3, the electronic controller outputs the small weight passenger information;

[0013] When the first air pressure value P a When it is greater than the third threshold value P3 and less than the fourth threshold value P4, the electronic controller outputs the medium-weight passenger information;

[0014] When the first air pressure value P a When the weight is greater than the fourth threshold value P4 and less than the fifth threshold value P5, the electronic controller outputs the heavy-weight occupant information;

[0015] When the first air pressure value P a When it is greater than or equal to the fifth threshold value P5, the electronic controller outputs heavy weight occupant information.

[0016] According to the technical solution provided in the embodiment of the present application, it also includes: at least one one-way air check valve; one end of the one-way air check valve is connected to the sensor point group and the air path channel, and the other end is connected to the internal space of the cabin.

[0017] According to the technical solution provided in the embodiment of the present application, the one-way air check valve is arranged adjacent to the stacked sensing part, arranged on each corresponding sensing point group and the air path connected thereto, or arranged inside the housing of the electronic controller.

[0018] According to the technical solution provided in the embodiment of the present application, an electronic membrane switch is provided on the stacked sensing portion, and the electronic membrane switch is electrically connected to the electronic controller via a wire.

[0019] According to the technical solution provided in the embodiment of the present application, the electronic membrane switch includes: an electronic membrane switch surface layer and an electronic membrane switch bottom base layer; a conductive coating, a conductive auxiliary layer, an electronic membrane switch spacing layer, a conductive auxiliary layer and a conductive coating are arranged in sequence from top to bottom between the electronic membrane switch surface layer and the electronic membrane switch bottom base layer; the electronic membrane switch bottom base layer is the first material surface layer.

[0020] According to the technical solution provided in the embodiment of the present application, a contact hole is formed between the electronic membrane switch spacing layer and the two conductive subsidiary layers.

[0021] According to the technical solution provided in the embodiment of the present application, the electronic controller is further provided with a second air pressure sensor connected to the interior space of the cabin; the output end of the second air pressure sensor is connected to the input end of the electronic controller, and the electronic controller is further configured to: calculate P C =P0-P b , P0 is the standard atmospheric pressure; the standard setting values ​​are all reduced by P C .

[0022] According to the technical solution provided in the embodiment of the present application, the stacked sensing portion is provided with stress-relief slots and / or groove crossing portions.

[0023] In a second aspect, the present application provides a car seat, comprising: a seat; the interior of the seat is installed with the above-mentioned seat occupant body classification recognition sensor system.

[0024] In summary, the technical solution specifically discloses a specific structure of a seat occupant body classification identification sensor system. The application specifically uses a sensor module to detect the weight of the occupant. When the occupant sits, pressure is applied to the load pad of the seat cushion, and then the sensor module is compressed, thereby detecting the weight of the occupant; then the air pressure value of the sensor module is monitored by an electronic controller, and data processing is performed to detect and identify the occupant weight range and classify it;

[0025] The present application utilizes the force-facing surface of the first material surface layer of the stacked body on the stacked sensing part, the through holes of the spacing layer and the second material surface layer to form a sensing cavity. When the sensing point group and the sensing cavity are subjected to external pressure, the sensing cavity forms an air pressure change inside the closed space, and the air pressure change is transmitted to the electronic controller through the air path channel; the first air pressure sensor of the electronic controller determines the difference in body weight of different occupants through the change in the gas pressure value of the sensing module; the air pressure value detected by the first pressure sensor is different for people of different weights sitting on the seat, and the air pressure value is processed and judged by the program signal to determine whether the person on the seat is heavier or lighter and the weight range; and the second air pressure sensor is connected to the interior space of the cabin to monitor the atmospheric pressure value of the interior space of the vehicle cabin, so that the electronic controller can better correct the detection value of the first air pressure sensor to achieve more accurate signal processing results.

[0026] The technical solution further arranges an electronic membrane switch on the stacked sensing part, which includes: an electronic membrane switch surface layer, a conductive coating, a conductive auxiliary layer, an electronic membrane switch spacer layer, a conductive auxiliary layer, a conductive coating and an electronic membrane switch bottom base layer arranged in sequence from top to bottom, and a contact hole is formed between the electronic membrane switch spacer layer and the two conductive auxiliary layers. When the seat surface is subjected to pressure, the contact hole is deformed, and the upper and lower conductive auxiliary layers are in contact, so that the circuit of the electronic membrane switch is turned on to detect human occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 , Figure 2 , Figure 3 The present invention is a structural schematic diagram of a recognition sensor system for classifying chair occupants.

[0029] Figure 4 It is a structural diagram of the air pressure sensing point in a non-stressed state.

[0030] Figure 5 It is a structural schematic diagram of the air pressure sensing point when it is under stress.

[0031] Figure 6 It is a structural schematic diagram of the gas channel connection relationship.

[0032] Figure 7 Schematic diagram of the structure of an electronic membrane switch.

[0033] Figure 8 It is a schematic diagram of the structure of the spacer layer in an unloaded state.

[0034] Fig. 9 It is a schematic diagram of the structure of the spacer layer when it is under stress.

[0035] Fig.10 , Fig.11 The figure is a schematic diagram of the structure of a car seat using the identification sensor system.

[0036] Numbers in the figure: 1. Sensing module; 2. Stacked sensing part; 3. Stacked body; 4. Sensing point group; 5. Air pressure sensing point; 6. Sensing cavity; 7. Air path channel; 8. One-way air check valve; 9. First material surface layer; 10. Spacer layer; 11. Second material surface layer; 12. Electronic membrane switch; 13. First air pressure sensor; 14. Second air pressure sensor; 15. Conductive coating; 16. Conductive auxiliary layer; 17. Electronic membrane switch spacer layer; 18. Contact cavity; 19. Electronic membrane switch surface layer; 20. Wire; 21. Groove crossing part; 22. Stress relief slot; 23. Seat. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] Embodiment 1

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 The schematic structural diagram of the first embodiment of a seat occupant body classification recognition sensor system provided by the present application includes: a sensor module 1 and an electronic controller used in conjunction;

[0041] The sensor module 1 comprises: a stacked sensor part 2 and at least one sensor point group 4 arranged on the stacked sensor part 2; the stacked sensor part 2 is provided with a stacked body 3; the stacked body 3 comprises: a first material surface layer 9, a spacer layer 10 and a second material surface layer 11 which are sequentially arranged from top to bottom; the spacer layer 10 is provided with a plurality of through holes and at least one air path channel 7; the through holes and the first material surface layer 9 and the second material surface layer 11 form an air pressure sensing point 5, and the air pressure sensing point 5 is connected to the air path channel 7; the air path channel 7 is connected to the electronic controller; the sensor point group 4 comprises: at least one air pressure sensing point 5 and at least one air path channel 7;

[0042] The electronic controller comprises: at least one first air pressure sensor 13 connected to the air channel 7; one of the sensor point groups 4 corresponds to at least one of the first air pressure sensors 13;

[0043] The electronic controller is configured to: obtain the first air pressure value P detected by the first air pressure sensor 13 a The first air pressure value P a Compare with the standard setting value, and then judge and output the occupant's body type information.

[0044] In this embodiment, the sensor module 1 is used to detect the weight of the occupant. When the occupant sits, pressure is applied to the load pad of the seat cushion, and the sensor module 1 is compressed, thereby detecting the weight of the occupant.

[0045] An electronic controller, used in conjunction with the sensor module 1, is used to monitor the air pressure value of the sensor module 1 and perform data processing, thereby realizing detection, identification and classification of the occupant weight range;

[0046] The stacked sensing part 2 is at least one in number; it can be arranged on the bearing pad inside the seat cover, inside the bearing pad, or between the bearing pad and the seat spring frame; wherein the stacked sensing part 2 is arranged on the bearing pad inside the seat cover by gluing and fixing together with the heating pad body;

[0047] Here, an air pump (air source) and a control valve can be used to inflate or deflate the stacked sensing part 2, and the air pressure sensor can be used to accurately adjust the air pressure value inside the stacked sensing part 2. At this time, the air replenishment function of the one-way air check valve 8 can also be replaced;

[0048] The sensing point group 4 is arranged on the stacked sensing part 2, and includes at least one air pressure sensing point 5, which is connected to the corresponding first air pressure sensor 13, so as to monitor the air pressure change inside the stacked sensing part 2; here, the sensing point group 4 is arranged in a crisscross pattern;

[0049] The stacked body 3 is arranged on the stacked sensing part 2 and is used to bear the pressure of the occupant. The first material surface layer 9, the spacer layer 10 and the second material surface layer 11 are sequentially arranged from top to bottom, and the force-facing surface of the first material surface layer 9, the through hole and the second material surface layer 11 form an air pressure sensing point 5, which can also be called a sensing cavity 6. The number of the air pressure sensing point 5 is at least one, and the air pressure sensing points 5 are connected by air paths. Optionally, a series-parallel connection mode of air path multiplexing is adopted to improve the stability of the air pressure sensing air path, so as to prevent the air pressure detection circuit from being blocked due to folding or blocking at a certain point of the air path, resulting in sensor failure;

[0050] When the air pressure sensing point 5 is subjected to external pressure, an air pressure change is formed inside the closed space, and the air pressure change is transmitted to the electronic controller through the air path; Figure 5 As shown, when the first material surface layer 9 is subjected to external pressure, it bends inward, and the air pressure inside the air pressure sensing point 5 rises; Figure 4 As shown, after the external pressure is removed, the first material surface layer 9 rebounds and returns to a flat state;

[0051] Here, the first material surface layer 9 and the second material surface layer 11 may be the same material or different materials; the material used may be, for example, an organic polymer film (e.g., polyester film, polyimide film, acetate film, polyethylene film, etc.), a metal elastic film, etc., or a composite layer of multiple materials (e.g., a composite of fabric, non-woven fabric, plastic layer, etc.);

[0052] The spacer layer 10 is a layered structure (the main body is a non-metallic polyester film, a rubber-plastic composite layer, a silicone soft elastic layer, a cloth-based composite film, a thick film printing coating film, a closed-cell plastic foam film, etc., as well as a metal film, a metal and non-metal composite film, etc.), or a pad with a certain thickness, such as a silicone pad, a rubber pad, a foam pad, a sponge pad, etc., and at least two of the above materials can be used. Preferably, for example: a polyester film with a sealing effect is used at the edge position of the stacked sensing part 2, and a sponge pad is used at the position with the sensing point 5 and the gas path channel 7;

[0053] Here, the spacer layer 10 spatially separates the first material surface layer 9 and the second material surface layer 11. Preferably, the spacer layer 10 is bonded and laminated with the first material surface layer 9 and the second material surface layer 11 by double-sided bonding.

[0054] like Figure 6 As shown, the sensing cavity 6 is connected to the first air pressure sensor 13 of the electronic controller through the air channel 7. Preferably, the air channel 7 can be connected in series, in parallel, or in series-parallel to form an air circuit connection with each sensing cavity 6;

[0055] The first air pressure sensor 13 is connected to the air path channel 7 to monitor the air pressure changes of each sensor point group 4 of the stacked sensor part 2 of the sensor module 1; the difference in body weight of different occupants is determined by the change in the gas pressure value of the sensor module 1; the air pressure value detected by the first pressure sensor is different for people of different weights sitting on the seat. The air pressure value is processed and judged by the program signal, and then it can be determined whether the person on the seat is heavier or lighter and the weight range.

[0056] In any preferred embodiment, the standard setting value includes a first threshold value P1, a second threshold value P2, a third threshold value P3, a fourth threshold value P4 and a fifth threshold value P5;

[0057] When the first air pressure value P a When the vehicle is less than or equal to the first threshold value P1, the electronic controller outputs information that no one is riding.

[0058] When the first air pressure value P a When it is greater than the first threshold value P1 and less than the second threshold value P2, the electronic controller outputs the occupancy information;

[0059] When the first air pressure value P a When it is greater than the second threshold value P2 and less than the third threshold value P3, the electronic controller outputs the small weight passenger information;

[0060] When the first air pressure value P a When it is greater than the third threshold value P3 and less than the fourth threshold value P4, the electronic controller outputs the medium-weight passenger information;

[0061] When the first air pressure value P a When the weight is greater than the fourth threshold value P4 and less than the fifth threshold value P5, the electronic controller outputs the heavy-weight occupant information;

[0062] When the first air pressure value P a When it is greater than or equal to the fifth threshold value P5, the electronic controller outputs heavy weight occupant information.

[0063] In this embodiment, the first threshold value P1 can be set to 0.02Mpa, the second threshold value P2 can be set to 0.025Mpa, the third threshold value P3 can be set to 0.03Mpa, the fourth threshold value P4 can be set to 0.035Mpa, and the fifth threshold value P5 can be set to 0.04Mpa;

[0064] When the first air pressure sensor 5 detects the first air pressure value P in the soft elastic hollow structure a , for example, the detected air pressure value P a is 0.041Mpa, and the first air pressure sensor 5 converts the air pressure value P a Output to the electronic controller, the electronic controller converts the air pressure value P a Compared with the standard value, ie, 0.041 MPa is greater than the fifth threshold value P5, the electronic controller outputs the heavy weight member information to the external communication.

[0065] In any preferred embodiment, it also includes: at least one one-way air check valve 8; one end of the one-way air check valve 8 is connected to the sensor point group 4 and the air channel 7, and the other end is connected to the internal space of the cabin.

[0066] In this embodiment, there is at least one one-way air check valve 8, one end of which is connected to the sensing point group 4 and the air path channel 7, and the other end of which is connected to the interior space of the cabin, and has the function of allowing one-way ventilation between the atmosphere of the interior space of the vehicle cabin and the stacked sensing unit 2; here, the installation position of the one-way air check valve 8 can be optionally arranged adjacent to the stacked sensing unit 2, arranged on each corresponding sensing point group 4 and the air path connected thereto, or arranged inside the housing of the electronic controller;

[0067] like Figure 1 As shown, two groups of sensor point groups 4 are arranged on the stacked sensor part 2, each group of sensor point groups 4 corresponds to its own first air pressure sensor 13 and one-way air check valve 8, and the two groups of sensor point groups 4 share an electronic controller. The two groups of sensor point groups 4 can not only detect whether the occupant occupies the seat, but also determine which group of sensor point groups 4 corresponds to the position occupied by the occupant based on the feedback of the first air pressure sensors 13 of the two groups of sensor point groups 4.

[0068] Among them, an overflow valve is set on each sensor point group 4 or its air channel 7 or the air pipe of the electronic controller. When the pressure value exceeds the set maximum value, the pressure is released from the overflow valve into the air to achieve the purpose of reducing the pressure value.

[0069] In any preferred embodiment, an electronic membrane switch 12 is disposed on the stacked sensor portion 2 , and the electronic membrane switch 12 is electrically connected to the electronic controller via a wire 20 .

[0070] In this embodiment, the electronic membrane switch 12 is disposed on the stacked sensing portion 2, and is electrically connected to the electronic controller via a wire 20, and plays a role in detecting human occupancy;

[0071] Here, the leads of the sheet of the electronic membrane switch 12 can be connected to the ECU, sharing a common connector.

[0072] The electronic membrane switch 12 may also be replaced by a capacitive human body detection sensor, a mechanical contact pressure switch or other electronic switch that can assist in human body detection sensing, which can also achieve the purpose of assisting in occupant human body detection.

[0073] In any preferred embodiment, the electronic membrane switch 12 includes: an electronic membrane switch surface layer 19 and an electronic membrane switch bottom substrate; a conductive coating 15, a conductive auxiliary layer 16, an electronic membrane switch spacer layer 17, a conductive auxiliary layer 16 and a conductive coating 15 are arranged in sequence from top to bottom between the electronic membrane switch surface layer 19 and the electronic membrane switch bottom substrate; the electronic membrane switch bottom substrate is the first material surface layer 9.

[0074] In this embodiment, if Figure 7 As shown, the electronic membrane switch 12 includes: an electronic membrane switch surface layer 19, a conductive coating 15, a conductive accessory layer 16, an electronic membrane switch spacer layer 17, a conductive accessory layer 16, a conductive coating 15 and an electronic membrane switch bottom substrate, which are arranged in sequence from top to bottom, and the electronic membrane switch 12 is located on the stack 3, and the electronic membrane switch bottom substrate and the first material surface layer 9 are the same substrate; here, the conductive accessory layer 16 is a carbon layer, and the conductive coating 15 is a silver layer;

[0075] Among them, a contact hole 18 is formed between the electronic film switch spacing layer 17 and the two conductive auxiliary layers 16. When the seat surface is subjected to pressure, the contact hole 18 is deformed, and the upper and lower conductive auxiliary layers 16 contact each other, so that the circuit of the electronic film switch 12 is turned on, and human occupancy detection is performed.

[0076] In any preferred embodiment, the electronic controller is further provided with a second air pressure sensor 14 in communication with the interior space of the cabin; the output end of the second air pressure sensor 14 is connected to the input end of the electronic controller, and the electronic controller is further configured to: calculate P C =P0-P b , P0 is the standard atmospheric pressure; the standard setting values ​​are all reduced by P C .

[0077] In this embodiment, the second air pressure sensor 14 is arranged in the electronic controller, which is connected to the interior space of the cabin and is used to monitor the atmospheric pressure value of the interior space of the vehicle cabin; it provides the air pressure value of the cabin for detection, so that the electronic controller can better correct the detection value of the first air pressure sensor 13 to achieve a more accurate signal processing result;

[0078] The second air pressure sensor 14 is used to detect the second air pressure value P of the outside world. b The output terminal of the second air pressure sensor 14 is connected to the input terminal of the electronic controller, and the electronic controller is also configured to: calculate P c =P0-P b , P0 is the standard atmospheric pressure; the standard setting values ​​are all reduced by P C .

[0079] Specifically, when the device is in an environment such as a plateau, the external atmospheric pressure is lower than the standard atmospheric pressure, which may easily cause the standard setting value set in this environment to be inaccurate. b , the electronic controller calculates the pressure difference P C , that is, the second pressure value P b The difference between the standard atmospheric pressure value P0 and the standard setting value is adjusted, that is, the standard setting value is reduced by P c , to correct the standard setting value.

[0080] It can be known that when the second air pressure value P detected by the device b When the pressure is higher than the standard atmospheric pressure P0, the pressure difference P calculated by C is a negative value, at this time the control unit corrects the standard setting value to the sum of the absolute value of the standard setting value and the air pressure difference.

[0081] In any preferred embodiment, the stacked sensing portion 2 is provided with a stress relief slot hole 22 and / or a groove crossing portion 21 .

[0082] In this embodiment, the groove crossing portion 21 is arranged on the stacked sensing portion 2 to avoid excessive stress concentration and damage or deformation of the stacked sensing portion 2; the groove crossing portion 21 is used to cross the groove on the seat 23 and extend to the part outside the seat groove to detect personnel type information in a larger area.

[0083] Embodiment 2

[0084] Please refer to Fig.10 and Fig.11 The structural schematic diagram of a car seat provided by the present application shown includes: a seat 23; the above-mentioned seat occupant body classification recognition sensor system is installed inside the seat 23.

[0085] In this embodiment, a seat occupant body classification recognition sensor system is installed inside the seat 23 to detect, identify and classify the seat occupant's body.

[0086] Here, the seat can adjust the force applied by the occupant's body from the seat surface to the stacked sensing part 2 by adding a soft and hardness adjusting layer, such as a sponge layer, non-woven fabric, fabric, etc., so as to achieve a more uniform and gentle force on the stacked sensing part 2, and the additional soft and hardness adjusting layer can be adjacent to the soft elastic hollow structure, or arranged in a non-contact position within its projection range.

[0087] The specific working process of this device is as follows:

[0088] First state (no one on board):

[0089] The air pressure sensing point of the laminated sensor unit inside the seat is in a non-pressurized state.

[0090] The pressure inside the sensing cavity of the air pressure sensing point of the stacked sensing part is consistent with the cabin atmospheric pressure outside, that is, the internal and external air pressures are balanced, there is no gas flow exchange (static state), and it is in a natural flat state. The air pressure value detected by the first air pressure sensor is a low pressure state (first limit value).

[0091] Second state (occupied / occupied):

[0092] The air pressure sensing points and sensing cavities of the stacked sensing part of the human body pressure detection air sensor module are in a state of compression and deformation. At this time, the air pressure value rises from the original low pressure value (first limit value) to a higher air pressure value (second limit value). At this time, it can be determined that the seat is occupied by a human occupant.

[0093] When the human body is occupied and the seat surface is under pressure (with passengers sitting in it), the weight of the human body presses on the seat surface and the air pressure sensing points and sensing cavity of the internal stacked sensing part.

[0094] Since the one-way air check valve is closed, the air inside cannot be discharged.

[0095] At this time, the classification of weight and body shape:

[0096] The soft elastic hollow structure is deformed under pressure and the internal air pressure value rises. The first air pressure sensor detects that the internal air pressure value reaches the second limit value and then determines the presence of the occupant's body.

[0097] According to the pressure response characteristics of the sensing point of the stacked sensor part, the lighter the occupant is, the smaller the compressive deformation of the sensing cavity of the air pressure sensing point is, and the lower the internal air pressure value corresponding to the compressive deformation is; conversely, the heavier the occupant is, the higher the internal air pressure value is.

[0098] More thresholds are set to further differentiate the bodies of the occupants, such as whether the occupants are small weight, medium weight, large weight, overweight, etc.

[0099] According to the pressure characteristics of the distributed sensor point group of the stacked sensor unit, the smaller the occupant's body size is, the fewer the number of air pressure sensor points that are compressed is, and the lower the air pressure value in the sensor circuit detected by the electronic controller of the air pressure monitoring function is; conversely, the larger the occupant's body size is, the higher the internal air pressure value is.

[0100] More thresholds are set to further differentiate the body types of the occupants, such as small body type, medium body type, large body type, extra-large body type, etc.

[0101] The third state (conversion state):

[0102] When a person sits on a vehicle seat for a long time, a negative pressure deficiency (air loss) may occur in the sensing cavity of the air pressure sensing point of the stacked sensing part due to a slight leakage in the air pressure detection air circuit.

[0103] When the occupant leaves the seat, the air pressure sensing point of the laminated sensing part collapses slightly. At this time, the shape gradually recovers to be flat due to the elastic reset of the first material surface layer of the air pressure sensing point of the laminated sensing part. At this time, the air is backflowed from the cabin to the inside of the soft elastic hollow structure from the opened one-way air check valve under the influence of the internal and external pressure difference until the internal and external pressures are balanced and full.

[0104] When the seat is unoccupied, if there is a deviation between the air pressure value of the atmosphere inside the cabin detected by the second air pressure sensor and the air pressure value inside the soft elastic hollow structure of the human body pressure detection air sensor, the electronic controller will compare and calculate the collected values ​​and then correct the initial detection threshold.

[0105] 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 seat occupant body classification recognition sensor system, characterized in that: include: A sensor module (1) and an electronic controller for use together; The sensing module (1) comprises: a stacked sensing part (2) and at least one sensing point group (4) arranged on the stacked sensing part (2); the stacked sensing part (2) is provided with a stacked body (3); the stacked body (3) comprises: a first material surface layer (9), a spacer layer (10) and a second material surface layer (11) which are sequentially arranged from top to bottom; the spacer layer (10) is provided with a plurality of through holes and at least one air path channel (7); the through holes and the first material surface layer (9) and the second material surface layer (11) form an air pressure sensing point (5), and the air pressure sensing point (5) is connected to the air path channel (7); the air path channel (7) is connected to the electronic controller; the sensing point group (4) comprises: at least one air pressure sensing point (5) and at least one air path channel (7); The electronic controller comprises: at least one first air pressure sensor (13) in communication with the air channel (7); one of the sensing point groups (4) corresponds to at least one of the first air pressure sensors (13); The electronic controller is configured to: obtain a first air pressure value P detected by the first air pressure sensor (13) a The first air pressure value P a Compare with the standard setting value, and then judge and output the occupant's body type information.

2. The seat occupant body classification recognition sensor system according to claim 1 is characterized in that: The standard setting values ​​include a first threshold value P1, a second threshold value P2, a third threshold value P3, a fourth threshold value P4 and a fifth threshold value P5; When the first air pressure value P a When the vehicle is less than or equal to the first threshold value P1, the electronic controller outputs information that no one is riding. When the first air pressure value P a When it is greater than the first threshold value P1 and less than the second threshold value P2, the electronic controller outputs the occupancy information; When the first air pressure value P a When it is greater than the second threshold value P2 and less than the third threshold value P3, the electronic controller outputs the small weight passenger information; When the first air pressure value P a When it is greater than the third threshold value P3 and less than the fourth threshold value P4, the electronic controller outputs the medium-weight passenger information; When the first air pressure value P a When the weight is greater than the fourth threshold value P4 and less than the fifth threshold value P5, the electronic controller outputs the heavy-weight occupant information; When the first air pressure value P a When it is greater than or equal to the fifth threshold value P5, the electronic controller outputs heavy weight occupant information.

3. The seat occupant body classification recognition sensor system according to claim 1, characterized in that: Also includes: At least one one-way air check valve (8); one end of the one-way air check valve (8) is in communication with the sensor point group (4) and the air channel (7), and the other end of the one-way air check valve (8) is in communication with the interior space of the cabin.

4. The seat occupant body classification recognition sensor system according to claim 3 is characterized in that: The one-way air check valve (8) is arranged adjacent to the stacked sensing portion (2), is arranged on each corresponding sensing point group (4) and an air path connected thereto, or is arranged inside the housing of the electronic controller.

5. The seat occupant body classification recognition sensor system according to claim 1, characterized in that: An electronic membrane switch (12) is provided on the stacked sensing portion (2), and the electronic membrane switch (12) is electrically connected to the electronic controller via a wire (20).

6. The seat occupant body classification recognition sensor system according to claim 5, characterized in that: The electronic membrane switch (12) comprises: an electronic membrane switch surface layer (19) and an electronic membrane switch bottom substrate; a conductive coating (15), a conductive accessory layer (16), an electronic membrane switch spacing layer (17), a conductive accessory layer (16), and a conductive coating (15) are sequentially arranged between the electronic membrane switch surface layer (19) and the electronic membrane switch bottom substrate from top to bottom; and the electronic membrane switch bottom substrate is the first material surface layer (9).

7. The seat occupant body classification recognition sensor system according to claim 6, characterized in that: A contact hole (18) is formed between the electronic membrane switch spacing layer (17) and the two conductive auxiliary layers (16).

8. The seat occupant body classification recognition sensor system according to claim 1, characterized in that: The electronic controller is also provided with a second air pressure sensor (14) in communication with the interior space of the cabin; the output end of the second air pressure sensor (14) is connected to the input end of the electronic controller, and the electronic controller is further configured to: calculate P C =P0-P b , P0 is the standard atmospheric pressure; the standard setting values ​​are all reduced by P C .

9. The seat occupant body classification recognition sensor system according to claim 1, characterized in that: The stacked sensing portion (2) is provided with a stress-reducing slot hole (22) and / or a groove crossing portion (21).

10. A car seat, characterized in that: include: A seat (23); a seat occupant body classification recognition sensor system according to any one of claims 1 to 9 is installed inside the seat (23).

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