CN1240394A - Occupant sensing and crash behavior system - Google Patents
Occupant sensing and crash behavior system Download PDFInfo
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- CN1240394A CN1240394A CN 97180634 CN97180634A CN1240394A CN 1240394 A CN1240394 A CN 1240394A CN 97180634 CN97180634 CN 97180634 CN 97180634 A CN97180634 A CN 97180634A CN 1240394 A CN1240394 A CN 1240394A
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Abstract
An occupant sensing and crash behavior system for a motor vehicle determines the presence and location of an occupant (16, 20, 22) to then control the deployment of supplemental restraint systems such as air bags or inflatable seat/shoulder belts. Crash anticipation and crash severity sensors (46, 48) provide additional inputs to the system to determine the behavior of the crash and the occupants therein. An infrared sensor (34) emits a plurality of beams to determine the location and position of the occupant and a proximity sensor is located on the air bag door or the occupant seat. Occupant weight (18) plus the presence and orientation of a child seat are considered. Seat belt control (26) is provided to control the length of the seat belt during an impact or crash.
Description
The present invention relates to the occupant detection in the self-propelled vehicle, relate more particularly to feature and position, passenger's behavior and the vehicle collision behavior of determining to clash into before moment and clashing into passenger in the transients.
In the current vehicles system, an air bag system is arranged in the instrument carrier panel of vehicle, it comprises the gas filled device that an inflatable air bag and electricity start.Usually the response electric signal starts gas filled device, and electric signal is produced by the one or more impact microphones that are positioned at front part of vehicle.Other sensor can be positioned to respond the side impact of vehicle.The electric signal that is produced by this sensor offers ECU (Electrical Control Unit) (ECU), and here they combine with other electric signal to produce ignition signal.
Have been found that the feature according to the passenger, adult or adult full-scale or that stature is big that the passenger is people or inanimate objects, baby, minor, stature is little need different airbag deployment conditions.For example, if baby is arranged in the child seat of passenger side, the expansion of air bag can finish ahead of time, depends on that the baby is face forward or rear in child seat.
The adult that stature is little need be from the very strong power of air bag, and the adult that stature is bigger needs to be retrained fully in collision accident.
In order to determine passenger's feature, weight sensor is arranged in seat, and it helps to determine passenger's relative weight scope, is light as the passenger than predetermined quantity escheat.
A purpose of native system provides a kind of adaptive constrained system, and this constrained system provides suitable constraint response according to the instant situation in vehicle and passenger seat storehouse under collision or bump condition.This system comprises various air bags and constant force seat belt retractor; The passenger seat storehouse sensor of the information on air bag front region and the seat is provided; Watch out for the pre-crash sensor of collision and forecast crash severity; System controller, its check collision generation and reception are from the input of sensor, with the crash severity correct inflation of air bag or the power of seatbelt handled when colliding according to passenger seat storehouse and forecast.
Passenger seat storehouse state is determined by several input medias, all input medias can use or be used in combination in some way together: one of this input media is a PPD/CPOD (passenger exists detection/child seat to exist an and orientation detection) seat unit, the existence of the child seat of its detection object or cooperation and the direction of child seat.Another this input is from the infrared pickoff that is installed in A post or other front area, and its data of seat area validation are also passed through to monitor in the borderline risk zone of this sensor monitoring air bag front object.The third input is mounted in the reflection capacitive transducer on the firewall, in this sensor monitoring air bag fwd borderline risk zone whether the object with high-moisture percentage is arranged.
In addition, input in addition can be mounted in the radar sensor of seat, firewall or head zone, and this sensor moves by measurement heart, chest or lung and monitors whether side or frontal zone in danger have the people who takes.
The independent data of analyzing from each sensor also make up to solve the limitation that every kind of detection technique exists, to produce the complete of passenger seat storehouse state and observation accurately.
Finish the purpose of these and other by occupant detection in the self-propelled vehicle of the present invention and collision system of behavior.This system has the crash sensor that is used for determining vehicle collision or crash situation existence.Crash sensor operation to this impact response produces a collision alarm.Gas filled device response ignition signal is to control the release of inflatable gas.Inflatable gas is fed in the restraint device, as air bag or inflatable seatbelt, thereby operation to stop the passenger because collision and travelling forward his or in his the seat.
Child's chair be used for child seat on the detection vehicle seat existence and towards direction, this device produces child seat electric signal, the existence of this signal indicating child seat and correct direction thereof or do not have child seat.For determining passenger's size, Weight detecting device produces response to the weight of the passenger on the seat, to produce the weight detecting signal.All aforementioned electric signals all are respectively in a plurality of vehicle parameter signals.
Exist and electric signal of position transduser generation, this electric signal shows have the passenger in seat, and shows the position of described relatively existence of passenger and position transduser.Existence and position signal that this sensor produces are as in the described vehicle parameter signal another.
One ECU (Electrical Control Unit) is to collision alarm, child seat electric signal and described other vehicle parameter signal response, to produce the electric ignition signal.Ignition signal is supplied to gas filled device, thereby discharges described inflatable gas controllably to make the restraint device inflation.
These and other objects will become clearer obvious by following accompanying drawing and detailed description.
In the accompanying drawings:
Figure 1 shows that the block scheme of occupant detection and collision system of behavior;
Figure 2 shows that the schematic top view of several position of components of Fig. 1 system in the self-propelled vehicle;
Figure 3 shows that the axonometric drawings such as signal of Fig. 2 system;
Figure 4 shows that the block scheme of infrared pickoff;
Figure 5 shows that the schematic views of Fig. 4 infrared pickoff;
Figure 6 shows that schematic views from the beam direction of Fig. 4 sensor;
Figure 7 shows that the scheme drawing of Fig. 4 infrared pickoff;
Figure 8 shows that the top view of Fig. 7 infrared pickoff;
Figure 9 shows that the schematic views of reflection capacitive transducer;
Figure 10 shows that the diagram of curves of presentation graphs 9 sensor opereating specifications.
By reference number with reference to the accompanying drawings, wherein represented as the occupant detection in self-propelled vehicle, used and collision system of behavior.This system has crash sensor 10, gas filled device 12, restraint device 14, be used to detect the existence of child seat and the child seat sensor device 16 of direction, Weight detecting device 18, a pair of existence and position transduser 20,22 or passenger position sensor, seatbelt sensor 24, seatbelt control unit 26 and ECU (Electrical Control Unit) (ECU) 28.
Collision or impact microphone 10 are usually located at the front portion of self-propelled vehicle 30 to survey anterior impact events.Three such sensors are arranged in some system, and wherein two are positioned at the headlight zone, and the 3rd or identification sensor are positioned near the passenger seat storehouse.No matter sensor is one or a plurality of, determines the existence of vehicle collision condition and produces collision alarm.Because this signal has provided the passenger's 36 that will influence vehicle the bump order of severity and has indicated, so be the vehicle parameter signal for this signal of this system.
In addition, one or more side impact sensors 32 can be positioned at each side of vehicle 30 to determine whether to take place side impact.Only front or the startup of side impact sensor in bump many times.
Gas filled device 12 is started by electric signal or ignition signal, and this device is an one unit, and it produces expandable gas usually.Inflatable gas is supplied to restraint device 14, as variable or inflatable seatbelt of air bag or shoulder belt.Restraint device 14 operations travel forward in the passenger seat storehouse owing to the unexpected deceleration of self-propelled vehicle 30 to stop the passenger.
Child seat sensor device 16 is relevant with child seat usually, the existence and the faces direction of child seat on its detection vehicle seat, and produce the child seat electric signal, this electric signal also is the vehicle parameter signal.Certainly if there is no child seat, this signal also can be noticed this situation.This sensor device can be operated to produce the child seat electric signal, and electric signal shows the existence and the direction of child seat.If child seat makes children towards vehicle rear, this situation can be noted and as will be seen, air bag is not unfolded.
Exist and position transduser 20,22 generation electric signal, this electric signal is illustrated in seat can exist the passenger.The position functions of sensor determine that the passenger exists relatively and the position of position transduser.The signal that produces will show passenger's existence or not exist and passenger's position that this signal is another vehicle parameter signal.In a preferred embodiment, two existence and position transduser 20,22 are arranged in the system, first sensor 20 is proximity sensor or reflection capacitive transducer, and second sensor 22 is infrared pickoffs.Other form of this sensor comprises ultrasonic transduter and photographic sensor.
All vehicle parameter signals all are electrically connected to ECU (Electrical Control Unit) (ECU) 28, to produce the electric ignition signal to gas filled device 12.In ECU, according to algorithm, many parameters have been stored changing the mixing of vehicle parameter signal, to produce suitable and correct ignition signal.A function of ECU28 and content is that total system and adaptive system or intelligence system are applied on the self-propelled vehicle.Usually some vehicle parameter signal will work stopping or not starting the expansion of restraint device 14, and some other vehicle parameter, the algorithm in ECU28 works and with control ground restraint device 14 is inflated to discharge inflatable gas.
According to its position in self-propelled vehicle 30, exist with one of position transduser 20 and work existing and position signal with the position that produces relative gas filled device 12.Under kind of situation, sensor can be positioned on the air bag doors or below the air bag doors.
In the preferred embodiment second exists and position transduser is an infrared pickoff 34, and it is positioned at passenger's top and front area.For this specification sheets, this sensor 34 is used as second sensor.As showing that below infrared pickoff 34 as showing, produces many infrared beams with definite passenger's 36 the posture and the position of the relative sensor of passenger in Fig. 4-8.Because sensor is arranged in self-propelled vehicle " A " post 38 in a preferred embodiment, the algorithm 40 among the ECU28 is used to change the signal that infrared pickoff 34 produces, to describe the position of passenger's relative restraint device 14.Another position of infrared pickoff can be near door or other frontal region.Important consideration aspect is to determine that sensor may detect passenger 36 appendage any part, and this part is very near restraint device 14, as air bag.For example, if passenger 36 hand or pin, or passenger itself " just in time leans against " when airbag deployment on the air bag, and the power of air bag may be exceedingly big.
For realizing this point, infrared pickoff 34 is launched eight infrared beams with the space between front portion, restraint device 14 and the seat zone itself of detecting seat 31.The part of two qualifications in space is positioned at the preset distance from balloon positions, as less than six inches, and 0-15.24cm, and between six inches to ten inches, 15.24 and 25.4cm.First allocation of space is called red sector 42, and it needs air bag flexibly to launch to alleviate the excessive damage of the passenger on the tram not.Second allocation of space is called yellow district 44, the normal forces that it needs air bag moderately to launch or reduce to launch.Following three qualifying parts in space may turn forward with identification passenger 36 between described preset distance, yellow district 44 and the passenger seat chair back.The corresponding upper body part of part of three qualifications of last group in space, normally passenger's the right side and left side shoulder and head.From the information that these eight light beams produce, ECU28 can determine whether passenger 36 stands on the air bag limit, in this way a child under the control of its algorithm 40; Or his or his arm, hand and pin is placed on the air bag doors or very near air bag doors; Or turn forward or people that one of imposing stature, can determine that by the position of knowing upper torso whether not on the normal position and left or right bank the passenger.Also discern the position of the position of passenger's relative restraint device about the information of head.
Particularly, if restraint device is an air bag, first sensor 20 is positioned at very near air bag doors.This sensor 20 detects passenger 36 the existence and the position of relative air bag.In a preferred embodiment, first sensor is a reflection capacitive transducer, but because the variation of the electric field that its response sensor is launched.This electric field is owing to passenger 36 dielectric properties changes, and do not produce an electric signal simultaneously when electric field and predetermined value.Usually electric field is that aqueous ingredients owing to passenger in the seat changes.As shown in Figure 10, this sensor does not have big detection range.The signal that produces is supplied to ECU (Electrical Control Unit) 28 as another of described vehicle parameter signal.
Because this is a system that is used for both detecting passenger's position, if there is the passenger, it still is a system that can determine the behavior of colliding.For this specification sheets, the collision behavior is the feature of the bump or the imminent bump of vehicle.For realizing this point, also comprise pre-collision sensor 46 devices, be used to detect the collision of motor-driven vehicles of prediction and produce the collision prediction electric signal.This signal provision is given ECU (Electrical Control Unit) 28, and can be used as another vehicle parameter signal.This sensor 46 can be based on the sensor of radar, and intrusive body in this zone is also surveyed in the zone of its perception vehicle periphery.In case detect intrusive body, signal comes into force, adjust the ECU state and prepare to launch suitable restraint device 14 beginning, and as air bag, perhaps frontal air bag or installing side airbag, or the combination of any of these air bag.The collision of prediction or the advantage of bump are both to have reduced the back needed time of deployment balloon that bumps, and determine that again best constraint launches, thereby protect the passenger preferably.
The signal of another behavior is produced by crash severity sensor 48, and actual bump of this sensor response or collision can be determined the order of severity of clashing into or colliding by the algorithm among the ECU28, thereby influences the expansion of restraint device 14.The signal that this sensor 48 produces is another of vehicle parameter signal, and it uses in ECU28 to influence the expansion of restraint device.
Another embodiment of gas filled device 14 is two stages or multistage gas filled device.Have the gas filled device module more than in this gas filled device, when working together, its operation is so that inflatable gas all leads to restraint device forcefully.If gas filled device 14 is two graduated charge devices,, can only make the F/s igniting because ECU28 determines to need very soft expansion.In case F/s launches, subordinate phase will be launched, not stay " living " gas filled device in immobilized vehicle.Calculate, if only need soft expansion, system will make the ignition delay schedule time of subordinate phase, be on the appropriate location that can launch fully to the passenger up to system prediction.If certainly do not show needs expansion soft or appropriateness, will be by two or all ignition device the time or the strong completely expansion of igniting generation side by side substantially.
Another embodiment of gas filled device 14 is a unlimited variable gas filled device unit, and it produces response to the signal from ECU (Electrical Control Unit).This gas filled device can be constructed to be permeable to control gas filled device gas along different activation slope emissions.This inflation will make the inflatable gas of various amounts be fed in the restraint device, with the power bump of control restraint device to the passenger.
For the degree of determining to launch, previously described first and second sensors 20,22 have been utilized.Sequentially fired, igniting simultaneously, the partial firing of ECU control gas filled device 14 and misfiring.Be construed as, the bump of not every vehicle all needs to launch restraint device.
The ignition signal in order to start gas filled device 14 that ECU28 produces also can be used to influence the operation of seatbelt control 26, to stop travelling forward of passenger.This operation can be used for shortening effectively the expansion around passenger's seatbelt or shoulder belt.This shoulder belt or seatbelt, the A end of whole occupant restraint system normally, even may not launch, the effect of this control also can be ignored.Other application of ignition signal is to start seatbelt/shoulder belt tightening device from seatbelt control 26 to work, to stop any motion of the passenger in the seat when clashing into.This seatbelt/shoulder belt pre-tensioning device also be used to stop the passenger forward or sideway movement.
In another embodiment of occupant detection and collision system of behavior, another first sensor 50 (Fig. 3), normally a reflection capacitive transducer is positioned on the seat 31, normally on seat back or in the seat back, to detect existing of passenger.Because this sensor not only helps to determine the passenger and is the people or only is the little rod of a bag, its also by its signal to ECU28 produce information with the identification seat on the position of seat relatively.
In another embodiment, another first sensor can be positioned on the vehicle doorn, whether tilts to lean against door or approaching door in order to determine the passenger.
In another embodiment, a radar sensor can be installed in the headrest area of seat, instrument carrier panel or seat to monitor personnel passenger.This normally needs in the side impact of danger.This sensor response heartbeat or heart movement, chest motion or lung motion.From the collected information of this sensor, can determine better observation to the passenger seat storehouse.
In a preferred embodiment, second sensor 22 is infrared pickoffs 34, and it is used for detecting existence and the position of the self-propelled vehicle passenger with air bag.This sensor has a plurality of infrared transmitters 52, is used for producing infrared beam from each projector.The infrared detector 54 that equates with infrared transmitter quantity responds each projector respectively.Each detector only responds a projector emitted light beams 56.This control will be described below.Optical lens device 58 is positioned near 54 pairs of projector 52 and the detectors, is used for infrared beam is focused on desired locations around self-propelled vehicle 30 passengers 38.As previously described, this is in order to determine passenger's actual position.A little special electronic device 60 is usually located in the housing of sensor, and each electrical connection in projector and the detector.By its algorithm, this electronics package 60 can be operated the electric signal that is supplied to ECU28 with generation.Distance the position that electric response is interdicted from projector 52 to light beam.Then this distance is converted to range observation from the desired location, the desired location can be sensor itself or be usually located at the air bag 14 that is different from this infrared pickoff position.Can determine this distance by the trigonometric survey theory or by the flight time method.
In the preferred embodiment of infrared pickoff 34, sensor comprises 54 groups of 8 projectors, 52 detectors, and each projector-detector set focuses on passenger's surrounding space of definite part.Projector-detector set can have one or more projectors 52/ or one or more detector 54.Particularly, being used for occupant detection is the center of headrest with the qualifying part that collides system of behavior; The edge of chest locations, seat and air bag zone.8 light beams of this sensor cover this three positions.In another embodiment, the quantity of projector-detector set is 5 at least, and it does not detect headrest and chest region corresponding to red and yellow zone.
As shown in Fig. 5 and 6, the light beam that points to the headrest center is labeled as H1.The purpose of this light beam is to determine that passenger's head is whether on its correct position.Be labeled as position shoulder and chest locations or passenger's the upper part of the body normally of following two beam alignment of S1 and S2.In system, these positions are below headrest, and in seat side edges or the entopic inboard of the passenger on bench seat.Following three beam alignment that are labeled as Y1, Y2 and Y3 are on a position, and promptly yellow zone, this zone are positioned at the anterior of seat edge and near balloon positions.Last two light beams, R1 and R2 point to a zone, and promptly the red sector territory 42, and this zone is very near air bag.
Like this, describe and showed the occupant detection used in the self-propelled vehicle and collision system of behavior.This system comprises additional restraint device, as air bag or inflatable shoulder or seat safety belt assembly, comprises the several sensors and the electronic control unit of many-light beam infrared pickoff, and these devices are used so that system becomes Vehicular system adaptivity or intelligence.
Claims (27)
- Occupant detection in one self-propelled vehicle and the collision system of behavior, this system comprises:One crash sensor is used for determining the existence of vehicle collision condition and produces collision alarm;Gas filled device, this device response ignition signal also can be operated to discharge inflatable gas;Restraint device, this device described inflatable gas of response also can be operated the passenger moving that causes with the constraint collision;Child seat sensor device, this device be used for the existence of child seat on the detection vehicle seat and its front portion towards direction, described device can be operated to produce the expression child seat and have child seat electric signal with direction;Weight detecting device, the weight on this device response seat also produces the weight detecting signal, and this weight detecting signal is one of a plurality of vehicle parameter signals;Exist and position transduser, be used for producing the electric signal that there is the position of relative described existence with the passenger of passenger and position transduser in the expression seat, and described existence and position signal be supplied to electronic control package, this exist and position signal as in the described vehicle parameter signal another;Electronic control unit, the described collision alarm of this cell response, described child seat electric signal and described other vehicle parameter signal, to produce the electric ignition signal, inflate controllably to make described restraint device thereby discharge described inflatable gas to described gas filled device.
- 2. according to occupant detection described in the claim 1 and collision system of behavior, it is characterized in that described Weight detecting device produces the predetermined weight detection signal according to one in a plurality of weight ranges on the seat.
- 3. according to occupant detection described in the claim 2 and collision system of behavior, it is characterized in that described Weight detecting device is positioned near the seat.
- 4. according to occupant detection described in the claim 1 and collision system of behavior, it is characterized in that described existence produces the described existence and the position signal of the position of relative described gas filled device with position transduser.
- 5. according to occupant detection described in the claim 1 and collision system of behavior, it is characterized in that, described existence and position transduser are infrared pickoffs that is positioned at passenger top and front area, and described infrared pickoff is used to produce a plurality of infrared beams with the passenger's of definite described relatively sensor posture and passenger's position.
- 6. according to occupant detection described in the claim 5 and collision system of behavior, it is characterized in that described infrared pickoff is arranged in " A " post of self-propelled vehicle.
- 7. according to occupant detection described in the claim 1 and collision system of behavior, it is characterized in that described restraint device is an air bag and comprises first sensor that this sensor is used to detect passenger's the existence and the position of relative described air bag; Described sensor can operate with the electric field of response sensor emission because the variation that passenger's dielectric properties produces, and when electric field is not predetermined value to described electronic control unit generation electric signal, this electric signal is as in the described vehicle parameter signal another.
- 8. according to occupant detection described in the claim 7 and collision system of behavior, comprise that also second exists and position transduser, this sensor is used for producing the electric signal that there is the position of relative described second existence with the passenger of passenger and position transduser in seat, and described existence and position signal be supplied to described electronics package, this exist and position signal as in the described vehicle parameter signal another.
- 9. occupant detection described in according to Claim 8 and collision system of behavior, it is characterized in that, described second existence and position transduser are infrared pickoffs that is arranged in passenger top and front area, and described infrared pickoff is used to produce many infrared beams with definite passenger's the posture and the position of the relative described sensor of passenger.
- 10. according to occupant detection described in the claim 9 and collision system of behavior, it is characterized in that described infrared pickoff is arranged in " A " post of self-propelled vehicle.
- 11., also comprise the device that is used to detect the collision of motor-driven vehicles of prediction and produces the collision prediction electric signal to described electronic control unit according to occupant detection described in the claim 1 and collision system of behavior.
- 12., also comprise the device that is used for machines motor-car crash severity and produces the crash severity electric signal to described electronic control unit according to occupant detection described in the claim 1 and collision system of behavior.
- 13., also comprise the device that is used to detect the collision of motor-driven vehicles of prediction and produces the collision prediction electric signal to described electronic control unit according to occupant detection described in the claim 9 and collision system of behavior.
- 14., also comprise the device that is used for machines motor-car crash severity and produces the crash severity electric signal to described electronic control unit according to occupant detection described in the claim 9 and collision system of behavior.
- 15. according to occupant detection described in the claim 9 and collision system of behavior, it is characterized in that, described gas filled device is a variable gas filled device, it has two gas filled devices and response at least from the described ignition signal of described electronic control unit, thereby response is from the existence and the position signal of described first and second sensors, described ignition signal selectively starts a gas filled device to give described restraint device a certain amount of inflatable gas release, this restraint device can be operated so that described restraint device is partly inflated, or starts two gas filled devices to give described restraint device whole inflatable gas release.
- 16. according to occupant detection described in the claim 1 and collision system of behavior, also comprise seat belt retractor, this device can be operated the described ignition signal of response to stop travelling forward of passenger.
- 17. according to occupant detection described in the claim 1 and collision system of behavior, also comprise belt tensioner for seat belt, this device can be operated the described ignition signal of response to stop travelling forward of passenger.
- 18. according to occupant detection described in the claim 7 and collision system of behavior, comprise that also another is positioned at the first sensor on the seat, this sensor is used to detect passenger's the existence and the position of relative seat.
- 19., it is characterized in that described another first sensor is positioned at the back of seat according to occupant detection described in the claim 18 and collision system of behavior.
- 20. according to occupant detection described in the claim 7 and collision system of behavior, comprise that also another is positioned at the first sensor near the car door of seat, this sensor is used to detect passenger's the existence and the position of relative car door.
- 21. according to occupant detection described in the claim 9 and collision system of behavior, it is characterized in that, described gas filled device is a unlimited variable gas filled device, this device response is from the described ignition signal of described electronic control unit, described electronic control unit response produces this described ignition signal from the existence and the position signal of described first and second sensors, described ignition signal makes the inflatable gas release of variable in described restraint device, to control the bump of described restraint device to the passenger.
- 22. one is used for detecting passenger's the existence and the infrared pickoff of the position of relative self-propelled vehicle restraint device, described self-propelled vehicle has an air bag, and described sensor comprises:A plurality of infrared transmitters are used for producing fan-shaped infrared beam from each projector;The a plurality of infrared detectors that equate with infrared transmitter quantity, each described explorer response are only from the described light beam of one of described projector;Lens devices is used for described infrared beam is focused on self-propelled vehicle passenger desired location on every side, to determine the position of passenger's relative restraint device;Electronics package, each in its described projector and the detector is electrically connected, and can operate with selectively start projector and detector to and produce response from position that light beam is interdicted the electric signal to the distance the projector.
- 23. the infrared pickoff according to described in the claim 22 is characterized in that, sensor comprises at least 5 projectors and detector set, and each projector and detector set focus on the definite part on passenger's surrounding space, to determine passenger's position and motion.
- 24. the infrared pickoff according to described in the claim 23 is characterized in that, two qualifying parts in space are positioned at the preset distance from balloon positions; Three qualifying parts in space are between described preset distance and passenger seat rear portion.
- 25., comprise that also expression starts the device of passenger's seatbelt on every side according to occupant detection described in the claim 1 and collision system of behavior.
- 26. the infrared pickoff according to described in the claim 22 is characterized in that, sensor comprises 8 projector-detector set, and each projector-detector set focuses on the space of the definite part around the passenger, to determine passenger's position and motion.
- 27. the infrared pickoff according to described in the claim 26 is characterized in that, two qualifying parts in space are positioned at the preset distance from balloon positions; Three qualifying parts in space between described preset distance and passenger seat rear portion, the corresponding passenger's of second group of three qualifying part in space the upper part of the body and head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180634 CN1240394A (en) | 1996-10-21 | 1997-10-15 | Occupant sensing and crash behavior system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/734,768 | 1996-10-21 | ||
| CN 97180634 CN1240394A (en) | 1996-10-21 | 1997-10-15 | Occupant sensing and crash behavior system |
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| CN1240394A true CN1240394A (en) | 2000-01-05 |
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| CN 97180634 Pending CN1240394A (en) | 1996-10-21 | 1997-10-15 | Occupant sensing and crash behavior system |
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