CN103085748A - Classification sensor for automobile seat cushion - Google Patents
Classification sensor for automobile seat cushion Download PDFInfo
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- CN103085748A CN103085748A CN2012103291122A CN201210329112A CN103085748A CN 103085748 A CN103085748 A CN 103085748A CN 2012103291122 A CN2012103291122 A CN 2012103291122A CN 201210329112 A CN201210329112 A CN 201210329112A CN 103085748 A CN103085748 A CN 103085748A
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Abstract
The invention discloses a classification sensor for an automobile seat cushion. The classification sensor comprises a plastic sealing block connected with the tail end of a sensor. Technical key points are that: the pressure sensor comprises opposite plastic thin film layers; aluminum foil layer conductive circuits and carbon paste layer conductive circuits are sequentially printed on the plastic thin film layers; the plastic thin film layers with the printed circuits are adhered through an interlayer to form a composite structure in which a plurality of sensing units capable of repeatedly measuring a load on the automobile seat cushion are arranged; and a machine core board for classifying and processing a resistance value signal of each sensing unit is arranged in the plastic sealing block, and is connected with an entire safety airbag electric control center. The classification sensor has the advantages that the expansion degree of a safety airbag is controlled when an accident happens, so that the safety of passengers in an automobile is effectively ensured; silver paste circuits are replaced by the aluminum foil layer conductive circuits, so that the compressive resistance of the sensor is improved; silver paste is replaced by an aluminum foil layer, so that production cost is greatly lowered; and an aluminum corrosion process is adopted instead, so that the production cost is lowered.
Description
Technical field
The present invention relates to the pressure sensor device of the vehicle occupant safety protection of vehicle passive security aspect.Be used for occupant or object situation on judgement identification automotive seat, to the occupant of Different Weight and the position judgement of classifying, when bumping with convenient automobile, more effectively control the amount of expansion of safety air bag, the protection of more effective realization to automobile passenger.
Background technology
Along with the vehicle safety rules are further perfect, measure also has clear and definite judgment criteria to CNCAP to the new car passenger protection at present.The present invention can more effectively improve the result of use of safety air bag by the details of taking of automotive occupant are provided, and improves the safety performance grade of vehicle.This has been proposed clear and definite laws and regulations requirement in American National road safety rules, and the occupant has been carried out the requirement of the installation of sensors of categorized protection.Stipulated the car of all U.S. domestics in the FMVSS208 legislative control on safety that U.S. NHTSA promulgates, the different classes of occupant of safety air bag reply from children to the adult and child seat is identified and when colliding in addition actv. protect and control the unlatching of safety air bag.These rules will make the domestic auto vendor that wishes that car load exports to the U.S. must install and use occupant's classified sensor to reach purpose occupant's classified sensor of outlet car load; can identify occupant's the state of taking and classification; effectively control the quick-fried amount that opens of safety air bag, more effectively protect occupant different classes of on automotive seat.
The sensor that uses at present mainly contains: weight sensor, according to the weight perception on seat, whether the people is arranged, and be adult or child; The electronics regions sensor can produce a low-energy electronics regions in operator's compartment, measure existence and position by this regional amperometric determination occupant; Infradred sensor is surveyed people's existence, to be different from abiotic thing according to heat; Optical pickocff is being watched seat attentively as same photographic camera, and compares with the image of vacant seat chair of storage, to differentiate existing and the position of human body; Ultrasonic transduter by the emission super sonic, is then analyzed existence and position that backward wave after the object run into is verified the occupant.
Sodium azide (NaN is arranged in the safety air bag of traditional automobile
3) or ammonium nitrate (NH
4NO
3) etc. material.When being subject to clashing in automobile is being run at high speed, decomposition reaction can occur rapidly in these materials, produces a large amount of gases, is full of air bag.Can not classify to the occupant and carry out the actv. protection.
In general; whether computer software is wanted can be according to occupant's stature, body weight, fasten seat belts, the people speed of a motor vehicle when present position, vehicle collision and shock degree etc. on the seat; and just make a response between in an instant; adjust expansion opportunity, speed and the degree of safety air bag; make safety air bag provide the most reasonable to the passenger and the protection of actv., particularly reduce the injury to nanuses such as children.
Summary of the invention
Classified sensor of the present invention can be controlled safety air bag classification inflation or hold-off pressure, with the injury that prevents that once the unexpected immense pressure of putting quick-fried generation produces the head part, and does not send warning in wear safety belt the passenger, avoids potential accident potential.
Technical scheme of the present invention is as follows:
A kind of automobile cushion classified sensor, comprise the plastic cement sealing block that is connected with transducer tip, it is characterized in that: described pressure sensor comprises the corresponding plastic film layers that arranges, print successively aluminium foil layer conducting channel, carbon slurry layer conducting channel on plastic film layers, the plastic film layers that is printed on printed wire is bonded together by interlayer, forming composite structure, but the sensing unit of load on a plurality of duplicate measurements automotive seat is set in described composite structure; The machine core board that the resistance value signal of each sensing unit is classified and processed is set in described plastic cement sealing block, and described machine core board is connected with car load safety air bag electronic management system.
Aluminium foil layer conducting channel in above-mentioned technical scheme prepares by aluminum corrosion method; described aluminum corrosion method comprises the steps: the appropriate protection liquid of printing on the aluminium foil layer conducting wire; then surperficial with after applying corrosive liquid corrosion 1-10min in the aluminium foil layer conducting channel, then wash protection liquid off with alkali lye.
The thickness of the aluminium foil layer in above-mentioned technical scheme is 3 ~ 30 μ m.
Corrosive liquid in above-mentioned technical scheme is hydrochloric acid.
Concentration of hydrochloric acid in above-mentioned technical scheme is 25 ~ 30wt%.
Protection liquid in above-mentioned technical scheme is Animal Bone colloid extract.
Compared with prior art, the present invention has the following advantages: classify according to drive and passengers weight, control the air-bag deployment amount when accident occurs, thereby more effectively guarantee passenger's safety; Adopt the aluminium foil layer circuit to replace silver slurry circuit, improved the pressure resistance of sensor, easily oxidation is low service life for silver, and after the less bending of toughness, resistance change is larger, and frangibility; Replace the silver slurry with aluminium foil layer, greatly reduced productive costs; Change into the aluminium etching process, simplified working condition, reduced productive costs, improved production efficiency.
Description of drawings:
Fig. 1 is the structural representation of pressure sensor of the present invention;
Fig. 2 is pressure sensitive unit view when not being stressed;
Fig. 3 a is pressure sensitive unit view when being subjected to less pressure;
Fig. 3 b is pressure sensitive unit view when being subjected to larger pressure;
Fig. 4 is principle of work circuit diagram of the present invention.
Main portion symbol in accompanying drawing:
11. plastic film layers; 12. plastic film layers through hole; 13. interlayer; 14. interlayer passage; 15. aluminium foil layer; 16. carbon slurry layer; 17. interlayer through hole; 18. sensing unit.
The specific embodiment
Load on automotive seat each sensing unit on described pressure sensor, what different pressure obtained is to convert corresponding resistance value to; The machine core board of transducer tip, inner in the unit time (1 second) by cycle mode, the resistance value of all sensing units of sensor is detected successively, by the algorithm routine of implanting, resistance value information is carried out following a few class: whether seat has load; Load is arranged and can carry out under estimate of situation, being classified in object or occupant's weight and position; There is load not judge.Above 3 large class details are as the Output rusults of machine core board; be delivered to car load safety air bag electronic management system; safety air bag is according to these information; determine whether open; when maybe needing to open, control the degree that air bag pops: for example, when the occupant is sitting in the seat front portion; the air bag amount of popping (and amount of expansion) is smaller, so that the chest and the face that just reach the occupant in auto against moment protect.
Sensor of the present invention and smart airbag are united use, and smart airbag is put the control that the modes such as quick-fried classification hold-off pressure realize the airbag deployment amount by classification.
With reference to figure 1, Fig. 4, comprise plastic film layers 11, carbon slurry layer 16, aluminium foil layer 15, interlayer 13, plastic film layers through hole 12 is set on described plastic film layers, described interlayer arranges the interlayer passage; Described plastic film layers 11, carbon slurry layer 16, aluminium foil layer 15 are by pressure sensitive adhesive double coated interlayer 13 forming composite structures, described aluminium foil layer is to be processed by the aluminium etching process, described pressure sensor end is connected with the plastic cement sealing block, wherein each sensing unit is by the pair of aluminum paillon foil, a pair of carbon slurry layer thin slice and the interlayer with through hole that bonds them together form, but the sensing unit 18 of load on a plurality of duplicate measurements automotive seat is set in described composite structure; The machine core board that the resistance value signal of each sensing unit is classified and processed is set in described plastic cement sealing block, and described machine core board is connected with car load safety air bag electronic management system.This automobile passenger classified sensor passes trapezoidal hole by the sensor clamping band, is fixed on the upper surface of foam cushion, and is connected with the vehicle assembly by the end connector.
With reference to figure 2, when sensor unit of the present invention was not stressed, this sensing unit carbon slurry layer 16 did not contact, and produces without corresponding resistor, and the machine core board in the plastic cement sealing block can not receive corresponding resistance value signal.The cause exposure levels of between each sensing unit carbon slurry layer different from body weight for humans produce difference, and the contact resistance value that produces when having electric current to pass through in corresponding process will thereby change.With reference to figure 3a, when sensor unit is stressed hour, air from interlayer through hole 17 successively by interlayer passage 14, plastic film layers through hole 12 is discharged, this sensing unit carbon slurry layer 16 is to interlayer through hole 17 depressions, and area of contact is less, produces certain resistance value; With reference to figure 3b, when sensor unit is stressed when larger, area of contact is larger, produces corresponding resistance value signal.
With reference to figure 4, pressure sensor has a plurality of sensing units 18, the load of each sensing unit 18 on can the duplicate measurements automotive seat.Described pressure sensor converts the different pressures of the load on automotive seat on each sensing unit 18 the corresponding resistance value signal of this sensing unit to.In certain hour, the machine core board of transducer tip detects successively to the resistance value of all sensing units of sensor, with information classify process after, pass to the safety air bag electronic management system.Control the amount of expansion of safety air bag when bumping, realize the occupant on automotive seat is effectively protected.
Above-mentioned classified sensor prepares by following method: at first print thickness is about the aluminium foil layer conducting channel of 25 μ m on plastic film layers, then after the appropriate Animal Bone colloid extract of printing on the aluminium foil layer conducting channel, coating 27wt% hydrochloric acid on whole aluminium foil layer, corrode after 5-8 minute, with the NaOH flushing of 40wt%.After drying, print carbon slurry layer thereon, then by being bonded together with the plastic film layers of printed wire with interlayer passage interlayer, described aluminium foil layer and carbon slurry layer conducting channel end are fixed in the plastic cement sealed gluing block, and draw by the wire of the plastic cement sealing block other end.Adopting concentration is that the hydrochloric acid of 25 ~ 30wt% can reach higher corrosion efficient, strictly controls etching time in 1 ~ 10min, avoided because of etching time long, and corrosive aluminum foil layer conducting channel.Adopt commercially available Animal Bone colloid extract, it is acidproof not alkaline-resisting, can well play protective circuit not by acid liquid corrosion.
Claims (6)
1. automobile cushion classified sensor, its end is connected with the plastic cement sealing block, it is characterized in that: described pressure sensor comprises the corresponding plastic film layers that arranges, print successively aluminium foil layer conducting channel, carbon slurry layer conducting channel on plastic film layers, the plastic film layers that is printed on printed wire is bonded together by interlayer, forming composite structure, but the sensing unit of load on a plurality of duplicate measurements automotive seat is set in described composite structure; The machine core board that the resistance value signal of each sensing unit is classified and processed is set in described plastic cement sealing block, and described machine core board is connected with car load safety air bag electronic management system.
2. classified sensor according to claim 1; it is characterized in that: described aluminium foil layer conducting channel prepares by aluminum corrosion method; described aluminum corrosion method comprises the steps: the appropriate protection liquid of printing on the aluminium foil layer conducting wire; then surperficial with after applying corrosive liquid corrosion 1-10min in the aluminium foil layer conducting channel, washing protection liquid off with alkali lye.
3. classified sensor according to claim 2, the thickness of described aluminium foil layer is 3 ~ 30 μ m.
4. classified sensor according to claim 2, it is characterized in that: described corrosive liquid is hydrochloric acid.
5. classified sensor according to claim 4, it is characterized in that: described concentration of hydrochloric acid is 25 ~ 30wt%.
6. classified sensor according to claim 2, it is characterized in that: described protection liquid is Animal Bone colloid extract.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103291122A CN103085748A (en) | 2012-09-07 | 2012-09-07 | Classification sensor for automobile seat cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103291122A CN103085748A (en) | 2012-09-07 | 2012-09-07 | Classification sensor for automobile seat cushion |
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| Publication Number | Publication Date |
|---|---|
| CN103085748A true CN103085748A (en) | 2013-05-08 |
Family
ID=48199027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103291122A Pending CN103085748A (en) | 2012-09-07 | 2012-09-07 | Classification sensor for automobile seat cushion |
Country Status (1)
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| CN (1) | CN103085748A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167268A (en) * | 2017-06-18 | 2017-09-15 | 王贺 | Resistance with pressure change pressure sensor |
| CN110108396A (en) * | 2019-06-05 | 2019-08-09 | 辽宁尚泽电子科技有限公司 | A kind of diaphragm pressure sensor and its manufacturing method |
| WO2019170165A1 (en) * | 2018-03-09 | 2019-09-12 | 周承岗 | Wearable safety airbag system |
| CN111051145A (en) * | 2017-06-30 | 2020-04-21 | 特斯拉公司 | Sensor and method for vehicle occupant classification system |
| CN114729843A (en) * | 2019-11-26 | 2022-07-08 | 松下知识产权经营株式会社 | Vehicle mounted object detection device and vehicle control system |
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| WO2001000453A1 (en) * | 1999-06-24 | 2001-01-04 | Siemens Aktiengesellschaft | Device for electrically connecting a plurality of sensors arranged on a sensor mat which can preferably be integrated into the seat of a motor vehicle |
| EP1080994A1 (en) * | 1999-09-02 | 2001-03-07 | Nec Corporation | Passenger detection system with electrodes in the seat and detection method |
| CN101191724A (en) * | 2006-11-28 | 2008-06-04 | 株式会社电装 | Seat sensor |
| CN101439701A (en) * | 2008-12-31 | 2009-05-27 | 长春夸克普精汽车电子有限责任公司 | Contact type broken circuit and short circuit two-state automobile passenger sensing method and sensor |
| CN101617236A (en) * | 2006-12-05 | 2009-12-30 | 马里米斯有限公司 | Electric sensor web, system and manufacture method thereof |
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2012
- 2012-09-07 CN CN2012103291122A patent/CN103085748A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001000453A1 (en) * | 1999-06-24 | 2001-01-04 | Siemens Aktiengesellschaft | Device for electrically connecting a plurality of sensors arranged on a sensor mat which can preferably be integrated into the seat of a motor vehicle |
| EP1080994A1 (en) * | 1999-09-02 | 2001-03-07 | Nec Corporation | Passenger detection system with electrodes in the seat and detection method |
| CN101191724A (en) * | 2006-11-28 | 2008-06-04 | 株式会社电装 | Seat sensor |
| CN101617236A (en) * | 2006-12-05 | 2009-12-30 | 马里米斯有限公司 | Electric sensor web, system and manufacture method thereof |
| CN101439701A (en) * | 2008-12-31 | 2009-05-27 | 长春夸克普精汽车电子有限责任公司 | Contact type broken circuit and short circuit two-state automobile passenger sensing method and sensor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167268A (en) * | 2017-06-18 | 2017-09-15 | 王贺 | Resistance with pressure change pressure sensor |
| CN111051145A (en) * | 2017-06-30 | 2020-04-21 | 特斯拉公司 | Sensor and method for vehicle occupant classification system |
| CN111051145B (en) * | 2017-06-30 | 2022-05-31 | 特斯拉公司 | Sensor and method for vehicle occupant classification system |
| WO2019170165A1 (en) * | 2018-03-09 | 2019-09-12 | 周承岗 | Wearable safety airbag system |
| CN110108396A (en) * | 2019-06-05 | 2019-08-09 | 辽宁尚泽电子科技有限公司 | A kind of diaphragm pressure sensor and its manufacturing method |
| CN114729843A (en) * | 2019-11-26 | 2022-07-08 | 松下知识产权经营株式会社 | Vehicle mounted object detection device and vehicle control system |
| CN114729843B (en) * | 2019-11-26 | 2024-04-26 | 松下知识产权经营株式会社 | Supported article detection device and vehicle control system |
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Application publication date: 20130508 |