摘要:
A vehicular collision detection apparatus includes a bumper reinforcement, a bumper cover, a chamber forming member, a pressure sensor, a pressure changing device, and a chamber state detecting device. The cover is displaceable relative to the reinforcement toward a rear of the vehicle upon collision. The chamber forming member is provided between the reinforcement and the cover and defines a chamber space that is deformable upon displacement of the cover. The pressure sensor senses pressure in the chamber space. The pressure changing device changes pressure. The chamber state detecting device detects whether or not the chamber forming member is broken based on the pressure, which is detected while the pressure changing device is in operation.
摘要:
A capacitance type seat occupant sensor system of a vehicle includes an AC electric power source, a main electrode disposed at a seat of the vehicle to form an electric field between the main electrode and the body of the vehicle, a guard electrode disposed between a seat frame and the main electrode, a switch unit for establishing connection of the guard electrode to have the same potential as the main electrode to provide a seat occupant sensing mode, an impedance calculating unit for calculating an impedance of a sensing circuit based on the AC voltage and an amount of current flowing through the sensing circuit, a real-part-and-imaginary-part calculating unit and judging unit for discriminating an occupant on the seat based on at least the imaginary part of the first impedance. The impedance calculating unit calculates a first impedance of an electric circuit including the main electrode when the switch means provides the seat occupant sensing mode, and the real-part-and-imaginary-part calculating unit calculates the real part and the imaginary part of the impedance.
摘要:
A pedestrian-detecting system mounted on an automotive vehicle includes a touch sensor for detecting a first touch of an object at a collision, an acceleration sensor for detecting deceleration at a collision, a calculator to which outputs of sensors are fed, and an electronic control unit for activating a pedestrian-protecting device when the calculator determines that the vehicle collides with a pedestrian. A time period T from the first touch detected by the touch sensor to a time when deceleration detected by the acceleration sensor reaches its peak is compared with a threshold time period Tth. If the time period T is longer than the time period Tth, it is determined that the vehicle collided with a pedestrian.
摘要:
A collision detection device is provided with a coil which is arranged at an inner side of an outer panel of a body portion of a vehicle and faces the outer panel to generate a magnetic field in a direction toward the outer panel, and a collision determining unit for determining a collision with the body portion of the vehicle based on a variation of an inductance of the coil. The collision determining unit includes a resonance circuit which is constructed of the coil. When there occurs a collision with the vehicle body portion, a distance between the outer panel and the coil will decrease so that an inductance of the coil can instantly decrease. Therefore, a resonance frequency of the resonance circuit will increase and be detected, thus shortening the response time.
摘要:
A vehicle collision detecting device includes a capacitor type sensor mounted on a portion of the vehicle, a resonant circuit connected to the sensor by a lead wire and a microcomputer for judging a collision with an object and a breakdown of the lead wire. The sensor has a pair of plate electrodes and a dielectric member disposed between the electrodes so that its capacitance changes if the sensor is crushed. The resonant circuit is constituted of an oscillator generating an ac signal of a fixed frequency, a coil and a diagnostic capacitor. The microcomputer judges which of collision and wire breakdown takes place based on the voltage appears on the lead wire when the oscillator generates the signal of a fixed frequency.
摘要:
A pedestrian detection system for a vehicle includes multiple acceleration sensors provided at different positions in a periphery portion of the vehicle, and a calculation unit for performing, based on a signal outputted by a designation acceleration sensor belonging to the multiple acceleration sensors, a determination whether an object colliding with the vehicle is a pedestrian. The designation acceleration sensor is one of the multiple acceleration sensors other than a closest acceleration sensor which is closest of the multiple acceleration sensors to a collision point with which the object has collided.
摘要:
An occupant detection system determines a seat occupancy condition including occupancy of a vehicle seat and a size of the occupant, that is, an adult or a child. The determined seat occupancy condition is sent to an air bag ECU as seat occupancy condition data used for air bag deployment. The system detects a velocity of the vehicle and compares it with a predetermined velocity threshold. When the velocity is equal to or lower than the threshold, the seat occupancy condition is determined and the determined condition is stored in a storage area as seat occupancy condition data. When the velocity is over the threshold, the stored seat occupancy condition date is send to the air bag ECU.
摘要:
A vehicle occupant detection apparatus having a plurality of load sensors located to produce analog signals indicative of the presence/absence of a seat occupant and the type of seat occupant (adult or child), in which the analog signals are supplied to an occupant detection ECU to be converted to digital form and judged, and in which the occupant detection ECU and load sensors are powered by the same power supply, so that the accuracy of A/D conversion is unaffected by variations in supply voltage, and moreover only a single stream of encoded digital data, conveying seat status information, is supplied to an air bag control apparatus.
摘要:
An obstacle discrimination device for a vehicle includes an absorber arranged at a front surface of a bumper reinforce member in a bumper cover of the vehicle, a pressure detection unit, a vehicle velocity detection unit and an obstacle judgment unit. The absorber has therein at least one chamber, in which fluid is sealed. A pressure in the chamber which varies due to a collision of an obstacle with a bumper of the vehicle is detected by the pressure detection unit. A pedestrian is distinguished according to whether or nor the pressure exceeds a threshold value related to a velocity of the vehicle detected by the vehicle velocity detection unit.
摘要:
A triggering device for a safety apparatus includes first and second deceleration detecting sensors located within first and second doors of a vehicle respectively or located at positions near the first and second doors respectively. Each of the first and second deceleration detecting sensors is operative for detecting a deceleration. A first signal processing section includes first and second signal processors for processing a detection signal of the first deceleration detecting sensor, and for implementing signal processing with two different processing levels respectively. A second signal processing section includes third and fourth signal processors for processing a detection signal of the second deceleration detecting sensor, and for implementing signal processing with two different processing levels respectively. A first safety device located at the first door is operative for protecting an occupant in the vehicle. A second safety device located at the second door is operative for protecting an occupant in the vehicle. First and second trigger components are operative for triggering the first and second safety devices respectively. One of the first and second trigger components is controlled to trigger one of the first and second safety devices on the basis of results of the signal processing by the first signal processor and the fourth signal processor. The other of the first and second trigger components is controlled to trigger the other of the first and second safety devices on the basis of results of the signal processing by the second signal processor and the third signal processor.