WO1999055557A1 - Capteur d'acceleration et declencheur d'air-bag - Google Patents

Capteur d'acceleration et declencheur d'air-bag Download PDF

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Publication number
WO1999055557A1
WO1999055557A1 PCT/JP1998/001937 JP9801937W WO9955557A1 WO 1999055557 A1 WO1999055557 A1 WO 1999055557A1 JP 9801937 W JP9801937 W JP 9801937W WO 9955557 A1 WO9955557 A1 WO 9955557A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
variable resistor
fixed contact
movable contact
mass body
Prior art date
Application number
PCT/JP1998/001937
Other languages
English (en)
Japanese (ja)
Inventor
Satoshi Asada
Toshiyuki Yamashita
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to JP54023899A priority Critical patent/JP3992755B2/ja
Priority to PCT/JP1998/001937 priority patent/WO1999055557A1/fr
Publication of WO1999055557A1 publication Critical patent/WO1999055557A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/135—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by making use of contacts which are actuated by a movable inertial mass

Definitions

  • the present invention relates to an acceleration detection device and an airbag activation device which are provided on a moving body such as an automobile, detect an acceleration generated at the time of collision of the moving body, and activate an airbag of the automobile or the like.
  • FIG. 1 is a diagram showing a conventional airbag activation device that activates an airbag using a conventional acceleration detection device.
  • 1 is a battery that supplies necessary power to each part of the vehicle
  • 2 is an induction switch that opens and closes the power supply from battery 1
  • 3 and 4 are diodes for preventing backflow
  • 5 is a battery 1 6 is a backup capacitor that supplies voltage when the power supply from the battery 1 is lost due to a car collision
  • 7 is a power supply device that supplies voltage to the microcomputer 14.
  • 8a and 8b are current shunt resistors
  • 9a and 9b are switch elements that open and close the current
  • iOa and 10b are ignited during inflation evening to inflate and deploy the airbag.
  • a pair of squibs, 11 is a switch element that opens and closes current
  • 14 is a microcomputer that receives the supply of stabilized voltage from the power supply 7 and controls the entire control circuit
  • 15 is a car collision Change in acceleration due to electric signal Conversion to a semiconductor sensor for transmitting to the microcomputer 1 4.
  • reference numeral 20 denotes a mechanical sensor that detects a collision of the vehicle. The vehicle decelerates at the time of the collision of the vehicle, and moves by receiving acceleration due to its inertial energy. It has a switch 21 to make.
  • one terminal of the switch 21 of the mechanical sensor 20 is connected to the diode 3 and the booster 5, the other terminal is connected to the current shunt resistors 8 a and 8 b, and the switch element 9
  • the gates of a, 9b, and 11 are connected to output ports P3, P4, and P5, respectively, of the microcomputer 14, and the semiconductor sensor 15 is connected to the input port P6 of the microcomputer 14. ing.
  • a semiconductor sensor for detecting the magnitude of acceleration and a mechanical sensor for preventing malfunction are used as the acceleration detection device used in the airbag activation device.
  • the booster 5 receives the voltage from the battery 1 via the diode 4 and generates a voltage higher than the voltage of the battery 1, for example. Charges knock-up capacitor 6.
  • the microcomputer 14 is normally supplied with power supply voltage from the battery 1 via the power supply device 7. When the power supply from the battery 1 is lost, the power supply voltage is supplied from the backup capacitor 6 via the power supply device 7.
  • the switch 21 of the mechanical sensor 20 closes and the voltage from the booster 5 is shunted by the resistors 8 a and 8. b, and the semiconductor sensor 15 integrates the acceleration due to the collision, converts it into an electric signal, and transmits it to the input port P 6 of the microcomputer 14.
  • the microcomputer 14 receives the input from the semiconductor sensor 15 and determines whether or not it is necessary to ignite the inflation. If it is necessary, the microcomputer 14 outputs the ignition signal from the output ports P3, P4 and P5. Is output to turn on the switch elements 9a, 9b, and 11 respectively. Then, a pair of squibs are generated by the voltage from Ignition current flows through 10a and 10b to inflate and deploy the airbag. Also, even if the supply of voltage from the battery 1 is stopped due to a collision, the backup capacitor 6 can supply a sufficient ignition current to the squibs 10a and 10b.
  • the conventional acceleration detection device uses the semiconductor sensor 15 for detecting the magnitude of acceleration and the mechanical sensor 20 for preventing malfunction as described above.
  • the mechanical sensor 20 is used to ensure reliability in a dual system to prevent the activation of the airbag activation device when the semiconductor sensor 15 malfunctions due to propagation noise or the like. is there.
  • the airbag activation device since the airbag activation device was configured by using the semiconductor sensor and the mechanical sensor in combination, it was difficult to reduce the size of the airbag activation device as a whole, and the cost was increased. .
  • the present invention has been made to solve the above-described problems, and has as its object to obtain a small-sized and inexpensive acceleration detection device and an airbag activation device. Disclosure of the invention
  • An acceleration sensing device includes a mass body having a predetermined mass, a sliding shaft on which the mass body slides, an elastic member for urging the mass body in a predetermined direction, and the predetermined direction.
  • a movable contact that moves along the sliding axis together with the mass member against the elastic member when receiving an acceleration in a direction opposite to the first direction, and a first and a second fixed contact that come in contact with the movement of the movable contact.
  • a contact and a variable resistor wherein the first fixed contact and the second fixed contact conduct, and the first fixed contact and the variable resistor conduct according to the amount of movement of the movable contact Things.
  • An acceleration sensing device includes a mass body having a predetermined mass, a sliding shaft on which the mass body slides, an elastic member for urging the mass body in a predetermined direction, and the predetermined direction. And a movable contact that moves along the sliding axis together with the mass member against the elastic member when receiving an acceleration in the opposite direction to the first, second, and second contacts.
  • the first fixed contact and the second fixed contact conduct according to the amount of movement of the movable contact, and the third fixed contact and the variable The resistor conducts.
  • An airbag activation device includes: a mass body having a predetermined mass; a sliding shaft on which the mass body slides; an elastic member for urging the mass body in a predetermined direction; A movable contact that moves along the sliding axis together with the mass body against the elastic member when subjected to acceleration in the opposite direction; a first and a second fixed contact that come in contact with the movement of the movable contact; Acceleration detection that has a variable resistor, conducts the first fixed contact and the second fixed contact, and conducts the first fixed contact and the variable resistor according to the amount of movement of the movable contact.
  • a driving means for inflating and deploying the airbag and a control means for controlling the driving means, wherein the first fixed contact and the second fixed contact are provided in accordance with the amount of movement of the movable contact.
  • the power supply voltage of the drive means Supplied by Rukoto to conduct the first fixed contact and the variable resistor, thereby obtaining a control signal of the control means.
  • control means obtains a control signal from one end of the variable resistor.
  • control means obtains a control signal from both ends of the variable resistor.
  • An airbag activation device includes: a mass body having a predetermined mass; a sliding shaft on which the mass body slides; an elastic member for urging the mass body in a predetermined direction; A movable contact that moves along the sliding axis together with the mass body against the elastic member when subjected to acceleration in the opposite direction; and a first, second, and third contact that comes in contact with the movement of the movable contact. It has a fixed contact and a variable resistance, and the first fixed contact and the second fixed contact conduct according to the amount of movement of the movable contact, and the third fixed contact and the variable resistance are connected.
  • the first fixed contact and the second fixed contact corresponding to the amount of movement of the movable contact. Power supply of the drive means Supplying pressure, by the third fixed contacts and the variable resistor is conductive, thereby obtaining a control signal of the control means.
  • control means obtains a distance and time required for the movable contact to move on the variable resistor from the input control signal, and controls the driving means based on the distance and time. It is.
  • control means samples the input control signal at predetermined time intervals to obtain an integrated value of the speed of the movable contact, and controls the driving means based on the integrated value of the speed. Is what you do.
  • FIG. 1 is a diagram showing a conventional airbag activation device that activates an airbag using a conventional acceleration detection device.
  • FIG. 2 is a diagram showing an airbag activation device according to Embodiment 1 for activating an airbag using the acceleration detection device according to Embodiment 1 of the present invention.
  • FIG. 3 is a perspective view showing an acceleration detecting device according to Embodiment 1 of the present invention.
  • FIG. 4 is a diagram showing a cross section of the acceleration detecting device according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a mechanical sensor according to Embodiment 1 of the present invention.
  • FIG. 6 is an equivalent circuit of the mechanical sensor according to Embodiment 1 of the present invention.
  • FIG. 7 is a diagram for explaining a determination method for inflating and deploying an airbag according to Embodiment 1 of the present invention.
  • FIG. 8 is a diagram showing an impact G waveform in the case of rough road traveling and a low-speed collision.
  • FIG. 9 is a diagram showing an airbag activation device according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of a mechanical sensor according to Embodiment 2 of the present invention.
  • FIG. 11 is an equivalent circuit of a mechanical sensor according to Embodiment 2 of the present invention.
  • FIG. 12 is a diagram showing an airbag activation device according to Embodiment 3 of the present invention.
  • FIG. 13 is a schematic diagram of a mechanical sensor according to Embodiment 3 of the present invention.
  • FIG. 14 is an equivalent circuit of the mechanical sensor according to Embodiment 3 of the present invention.
  • FIG. 2 is a diagram showing an airbag activation device that activates an airbag using the acceleration detection device according to the first embodiment of the present invention.
  • Reference numeral 30 denotes a mechanical sensor, which is composed of two switches 3 la and 3 lb which are closed by receiving an acceleration at the time of an automobile collision and a variable resistor 32 such as a nichrome plate.
  • One terminal of the switch 31a is connected to the diode 3 and the booster 5, and the other terminal is connected to the current shunt resistors 8a and 8b, and one terminal of the switch 31b.
  • Is connected to the diode 3 and the booster 5, and the other terminal is connected to the moving terminal of the variable resistor 32.
  • One fixed terminal of the variable resistor 32 is grounded via the resistor 16a and connected to the input port P1 of the microcomputer via the IZF 12 which converts the voltage. .
  • the semiconductor type sensor 15 in FIG. 1 which has been conventionally used is omitted.
  • the other configuration is the same as the conventional configuration in FIG.
  • FIG. 3 shows an embodiment of the present invention.
  • FIG. 4 is a perspective view of an acceleration detecting device according to No. 1, that is, a mechanical sensor 30, and FIG. 4 is a view showing a cross section of the acceleration detecting device.
  • reference numeral 3 2 denotes the variable resistor in FIG.
  • reference numerals 1 1 1 and 1 1 2 denote fixed contacts
  • reference numeral 1 1 denotes a fixed contact 1 1 1 and a movable contact which contacts the fixed contact 1 1 2.
  • Reference numeral 1 15 denotes a movable contact that contacts the fixed contact 1 1 1 and the variable resistor 3 2.
  • 1 16 is a mass body holding the movable contacts 1 14 and 1 15 and having a predetermined mass
  • 1 17 is a sliding shaft for sliding the mass body 1 16
  • 1 18 is a sliding shaft 1
  • a coil spring is installed around 17 and urges the mass 1 16 in the direction opposite to arrow A. This is the housing of the sensor (mechanical sensor 30).
  • FIG. 5 is a schematic diagram of the mechanical sensor 30.
  • the fixed contact 1 1 1 is connected to the diode 3 and the booster 5
  • the fixed contact 1 1 2 is connected to the current shunt resistors 8a and 8b
  • one end of the variable resistor 3 2 is connected to the resistor 16a.
  • the pair of movable contacts 1 1 4 move in the direction of arrow A, they contact the fixed contacts 1 1 1 and 1 1 2 to make the fixed contacts 1 1 1 and 1 1 2 conductive.
  • the switch 31a in FIG. 2 is composed of fixed contacts 111, 112 and a movable contact 114
  • the switch 31b is a fixed contact 111, a variable resistor 32 and a movable contact 31b. It consists of contacts 1 and 5.
  • the booster 5 receives the supply of the voltage from the battery 1 via the diode 4 as in the related art. Generates a voltage higher than the voltage and charges the backup capacitor 6.
  • the microcomputer 14 is normally supplied with power supply voltage from the battery 1 via the power supply 7.
  • the power supply voltage is supplied from the backup capacitor 6 via the power supply 7.
  • the mass body 116 is urged in the direction opposite to the arrow A by the elastic force of the coil spring 118 in FIGS.
  • the movable contacts 1 1 4 and 1 1 5 are separated from the fixed contacts 1 1 1 and 1 1 2 and the variable resistor 3 2 .
  • the voltage from the booster 5 is a current component. It is not supplied to the diverted resistors 8a and 8b or the variable resistor 32.
  • the vehicle collides and the deceleration of the vehicle exceeds a predetermined value, that is, if the acceleration of the mechanical sensor 30 exceeds the predetermined value, the mass 1 16 Overcoming the elastic force, the movable contacts 1 1 4 and 1 1 5 of the mechanical sensor 30 move in the direction of arrow A, and the fixed contact 1 1 1 and the fixed contact 1 1 2 are electrically connected, and the voltage is increased.
  • the voltage from the booster 5 is supplied to the current shunt resistors 8a and 8b, and the fixed contact 1 1 1 and the variable resistor 32 are electrically connected. To supply.
  • the position of the movable contact 1 15 changes on the variable resistor 3 2 depending on the value of the acceleration applied to the mechanical sensor 30, and both ends of the resistor 16 a depend on the position of the movable contact 1 15.
  • a changing voltage is generated. After that, when the vehicle stops after the collision and the acceleration disappears, the mass body 116 is returned by the elastic force of the coil spring 118, and the movable contacts 111, 115 become fixed contacts 111, The voltage supply to the current shunt resistors 8a and 8b and the variable resistor 32 is stopped by separating from 1 1 2 and the variable resistor 32.
  • FIG. 6 is an equivalent circuit showing the relationship between each resistance value of the variable resistor 32 and the resistor 16a and the voltage.
  • the resistivity of the variable resistor 32 is p
  • the length is 1
  • the distance from one end of the movable contact 1 15 (the connection side to the resistor 16a) is X
  • the resistance value of the resistor 16 & & If the voltage from the booster 5 is V, the voltage across the resistor 16a is Va, and the cross-sectional area of the variable resistor 32 is the unit cross-sectional area, the following equation holds.
  • V a V ⁇ R a / (px + R a) (1)
  • the voltage V a that changes with the distance X is equal to the input port P of the microcomputer 14 via the I / F 12. Entered into 1.
  • the distance X can be obtained as follows.
  • the microcomputer 14 receives the signal from the input port P1 to determine Judgment of the necessity of ignition for unframed evening and output port if necessary
  • An ignition signal is output from P3, P4, and P5 to turn on the switch elements 9a, 9b, and 11 respectively. Then, an ignition current flows through the pair of squibs 10a and 10b by the voltage from the booster 5, and the airbag is inflated and deployed.
  • FIG. 7 is a diagram for explaining a determination method based on a moving distance X and a moving time T of the movable contact 1 15.
  • the horizontal axis represents the time from the start of contact of the movable contact 115 with the variable resistor 32
  • the vertical axis represents the distance traveled by the movable contact 115 on the variable resistor 32.
  • the shaded area indicates the area where the airbag is inflated and deployed.
  • the collision type (I) is such that when the distance X is large enough and the time T is small, the collision type ( ⁇ ) is the distance X and the time index is somewhat large, and the collision type ( ⁇ ) is that the distance X is small. It is a case where it is small and the time T is large to some extent.
  • the airbag is not inflated and deployed, but in the case of ( ⁇ ), the airbag is inflated and deployed at the point Q that intersects the hatched area line.
  • the microcomputer 14 calculates the distance X and the time T based on the signal input to the input port P1, and determines whether to inflate and deploy the airbag.
  • the speed at which the mass body 116 moves that is, the speed at which the movable contact 115 moves, is calculated at predetermined time intervals from the physical quantity of the acceleration detection device, and a determination is made based on the integrated value.
  • the mass of the mass body 116 is m
  • the spring constant of the coil spring 118 is k
  • the initial load of the panel is ⁇ . If the sampling time is ⁇ , the integrated value U of the velocity of the mass body 116 can be expressed by the following equation.
  • the microcomputer 14 holds the physical quantity of the acceleration detecting device in advance, and sets the distance X from the signal input to the input port P 1 to X. Is determined.
  • This determination method is based on the integrated value of the speed at each sampling time, and compared to the method based on a single sampling of distance and time shown in Fig. 7, it can be used for various types of collisions. And more appropriate judgment can be made.
  • FIG. 8 shows an impact G waveform when the car is traveling on rough roads, Lafrod, and when a low-speed collision occurs.
  • it is necessary not to inflate and deploy the airbag for running under the load, but to inflate and deploy the airbag for low-speed collision.However, it is difficult to make an appropriate determination using the determination method in Fig. 7. become.
  • the integrated value of the impact G waveform of the rough road running is small, and the integrated value of the impact G waveform of the low speed collision is large, so that the distinction can be made clearly. It is possible.
  • the above integrated value of the speed is calculated from the time and distance at each sampling time based on the signal input to the input port P1 of the force microcomputer 14, which is obtained from the physical quantity of the acceleration detection device. The same determination can be made by using the integrated value of.
  • the microcomputer 14 determines whether to inflate and deploy the airbag based on the input signal input to the input port P1 based on the above determination method. to decide.
  • the knock-up capacitor 6 supplies a sufficient ignition current to the squibs 10a and 10b.
  • the mechanical sensor is provided with the variable resistor, and the magnitude of the collision energy is determined to control the inflation and deployment of the airbag.
  • the conventional semiconductor sensor can be omitted, and an effect that a compact and inexpensive acceleration detecting device and an airbag starting device can be realized can be obtained.
  • Embodiment 2
  • FIG. 9 is a diagram showing an airbag activation device according to Embodiment 2 of the present invention.
  • the second embodiment differs from the first embodiment in FIG. 2 in that the other end of the variable resistor 32, which is open in FIG. 2, is grounded via a resistor 16b and converts the voltage I ZF 1 3 in that it is secondly connected to input port P2 of microcomputer 14 via.
  • Other configurations are the same as those in FIG. 2 of the first embodiment.
  • FIG. 10 is a schematic view of the mechanical sensor 30.
  • the resistors 16a, I / F12 and 16b, I / F13 are provided at both ends of the variable resistor 32, respectively. Connected.
  • Figure 11 is an equivalent circuit showing the relationship between the voltage and the resistance of the variable resistor 32 and resistors 16a and 16b.
  • the resistance value of the resistor 16b is Rb
  • the voltage across the resistor 16b is Vb
  • the other components are the same as those in FIG. 6 of the first embodiment, the following equation is established.
  • V a V-R a / (px + R a)
  • V b V-R b / (p (1-x) + R b) (5)
  • the voltage V a varying according to the distance x is input to the input port P 1 of the microcomputer 14 via the force ⁇ I / F 12, and in equation (5), it varies according to the distance X
  • the voltage Vb is input to the input port P2 of the microcomputer 14 via the I / F13.
  • the distance X can be obtained as follows.
  • the microcomputer 14 determines whether or not the inflation should be ignited based on the signals input to the input ports P 1 and P 2. If the ignition is necessary, the output ports P 3 and P 4 , P5 to output an ignition signal to turn on the switch elements 9a, 9b, 11 respectively. Then, an ignition current flows through the pair of squibs 10a and 10b by the voltage from the booster 5, and the airbag is inflated and deployed.
  • the determination method for the microcomputer 14 to inflate and deploy the airbag based on the signals input to the input ports Pl and P2 is determined in the same manner as in the first embodiment.
  • the mechanical sensor is provided with a variable resistor, and the magnitude of the collision energy is determined to control the inflation and deployment of the airbag.
  • the conventional semiconductor sensor can be omitted, and an effect that a compact and inexpensive acceleration detecting device and an airbag starting device can be realized can be obtained.
  • FIG. 12 is a diagram showing an airbag starting device according to Embodiment 3 of the present invention
  • FIG. 13 is a schematic diagram of a mechanical sensor 30.
  • the fixed contact 1 1 1 is separated into two fixed contacts 11 la and 11 lb, and the fixed contacts 11 la and 1 12 and the movable contact 1 14 constitute the switch 31a of FIG. 12, and the fixed contact 1 11, the variable resistor 32 and the movable contact 1 15 constitute the switch 31 of FIG. Switch 31b is configured.
  • One terminal of the variable resistor 32 is grounded, the other terminal is connected to the booster 5 in the same manner as the fixed contact 11 la, and the fixed contact 11 b is connected to the microcomputer via the IZF 12. Connected to 14 input port P 1.
  • FIG. 14 is an equivalent circuit showing the relationship between the resistance value of the variable resistor 32 and the voltage. In the figure, if the voltage at both ends of the resistance value p X is V c, the following equation holds
  • the microcomputer 14 determines whether or not it is necessary to ignite the infra-frame based on the signal input to the input port P1, and if necessary, ignites from the output ports P3, P4 and P5. A signal is output, and switch elements 9a, 9b, and 11 are turned on. The voltage from the booster 5 causes a pair of switches. The ignition current flows through the quibs 10a and 10b to inflate and deploy the airbag.Here, the microcomputer 14 uses the signal input to the input port P1 to determine whether to inflate and deploy the airbag. Judgment is made in the same manner as in mode 1.
  • the mechanical sensor is provided with a variable resistor, and the magnitude of the collision energy is determined to control the inflation and deployment of the airbag.
  • the conventional semiconductor sensor can be omitted, and an effect that a compact and inexpensive acceleration detecting device and an airbag starting device can be realized can be obtained.
  • the acceleration detection device and the airbag activation device according to the present invention can omit the semiconductor sensor used in the related art, and are suitable for a device that is reduced in size and realized at low cost. .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un capteur d'accélération pourvu d'un contact fixe mis en contact avec un contact mobile lorsque ce contact mobile se déplace et une résistance variable. L'invention concerne également un déclencheur d'air-bag qui détecte la distance et la durée pendant laquelle le contact mobile se déplace dans le capteur d'accélération, qui mesure la grandeur de l'énergie de collision, et qui commande le gonflage et le déploiement de l'air-bag.
PCT/JP1998/001937 1998-04-27 1998-04-27 Capteur d'acceleration et declencheur d'air-bag WO1999055557A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP54023899A JP3992755B2 (ja) 1998-04-27 1998-04-27 加速度検知装置及びエアバッグ起動装置
PCT/JP1998/001937 WO1999055557A1 (fr) 1998-04-27 1998-04-27 Capteur d'acceleration et declencheur d'air-bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1998/001937 WO1999055557A1 (fr) 1998-04-27 1998-04-27 Capteur d'acceleration et declencheur d'air-bag

Publications (1)

Publication Number Publication Date
WO1999055557A1 true WO1999055557A1 (fr) 1999-11-04

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Application Number Title Priority Date Filing Date
PCT/JP1998/001937 WO1999055557A1 (fr) 1998-04-27 1998-04-27 Capteur d'acceleration et declencheur d'air-bag

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WO (1) WO1999055557A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185591A (ja) * 2008-02-22 2008-08-14 Mitsubishi Electric Corp 加速度検出装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03121951A (ja) * 1989-10-04 1991-05-23 Alps Electric Co Ltd エアバツグ起動制御装置
JPH03208750A (ja) * 1989-11-03 1991-09-11 Trw Vehicle Safety Syst Inc 乗物の衝突における周波数成分を決定するための方法
JPH03237359A (ja) * 1990-02-14 1991-10-23 Nissan Motor Co Ltd ２次元加速度センサ
JPH041461U (fr) * 1990-04-16 1992-01-08
JPH0478640A (ja) * 1990-07-16 1992-03-12 Zexel Corp 乗員保護装置の作動装置
JPH09211023A (ja) * 1996-01-31 1997-08-15 Mitsubishi Electric Corp 加速度検知装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03121951A (ja) * 1989-10-04 1991-05-23 Alps Electric Co Ltd エアバツグ起動制御装置
JPH03208750A (ja) * 1989-11-03 1991-09-11 Trw Vehicle Safety Syst Inc 乗物の衝突における周波数成分を決定するための方法
JPH03237359A (ja) * 1990-02-14 1991-10-23 Nissan Motor Co Ltd ２次元加速度センサ
JPH041461U (fr) * 1990-04-16 1992-01-08
JPH0478640A (ja) * 1990-07-16 1992-03-12 Zexel Corp 乗員保護装置の作動装置
JPH09211023A (ja) * 1996-01-31 1997-08-15 Mitsubishi Electric Corp 加速度検知装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185591A (ja) * 2008-02-22 2008-08-14 Mitsubishi Electric Corp 加速度検出装置

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