Abstract: A mounting structure of a collision detection apparatus for a vehicle has a vehicular member, a pressure sensor, and a shock absorbing member. The vehicular member defines a closed space therein. The shock absorbing member is disposed between the pressure sensor and a wall of the vehicular member. The pressure sensor is mounted to the wall of the vehicular member through the shock absorbing member in the closed space. The shock absorbing member is for example a nail-shaped spring member. Alternatively, the shock absorbing member can be a spacer having rubber elasticity.

Abstract: A pressure sensor is provided with a housing which has an opening portion for communicating an interior of the housing with an exterior, and a pressure detecting unit which has a detection surface for detecting a pressure applied thereto through the opening and is arranged in the housing. One of a perimeter of the detection surface and that of the opening portion has a protrusion portion which protrudes toward other of the perimeters. The other of the perimeters has a groove, into which a tip of the protrusion portion is inserted. A seal member is arranged between the groove and the protrusion portion, to seal therebetween and buffer stress caused by relative displacement between the housing and the pressure detecting unit.

Abstract: A collision detecting system for a vehicle has a pressure detecting member for detecting a pressure in a substantially closed space which is arranged at a periphery portion of the vehicle, and a vibration detecting member for detecting a vibration of the vehicle. The pressure in the space is calculated for a detection of a vehicle collision, based on pressure signals detected by the pressure detecting member and vibration signals detected by the vibration detecting member. Therefore, the influence of the vehicle vibration on the detection of the pressure in the space can be restricted, thus improving the detection of the vehicle collision.

Abstract: A collision detecting system is provided to detect a collision of a vehicle based on a pressure variation in a substantially closed space which is arranged at a periphery portion of the vehicle. The collision detecting system has a sensing unit which detects a pressure in the space. The sensing unit is arranged at the vehicle in such a manner that a detection direction of the sensing unit is slanted with respect to the direction of an impact on the vehicle due to the collision. Therefore, the vehicle vibration excited by the impact can be restricted from influencing the detection result of the pressure in the space by the sensing unit, thus improving the detection of the vehicle collision.

Abstract: Each front sensor senses a load, which is applied to a front part of a seat, and each rear sensor senses a load, which is applied to a rear part of the seat. A size of an entire load sensing range of each front sensor is smaller than a size of an entire load sensing range of each rear sensor.

Abstract: A window glass is displaceably supported by a vehicle door and is receivable in an interior space, which is formed between an inner panel and an outer panel of the door. A pressure sensor, which senses a pressure in the interior space, is positioned on an inner panel side of the window glass in a state where the window glass is received in the interior space. A collision of a vehicle is sensed based on a measured pressure of the pressure sensor.

Abstract: A diaphragm-type pressure sensing apparatus includes a pressure sensor having a diaphragm for converting pressure into an electrical signal, a circuit board for processing the electrical signal, and a housing in which the pressure sensor and the circuit board are sealed. The pressure sensor is bonded to the housing and sandwiched between the circuit board fixed to the housing and the housing. This structure reduces compressive stress applied to the pressure sensor and the circuit board so that accuracy of the pressure sensing apparatus can be improved.

Abstract: In a vehicle collision sensing system, a relative pressure sensor senses a pressure difference between a pressure at an inside of a door interior space and a pressure at an outside of the door interior space. An air bag ECU determines the collision of the vehicle based on the pressure difference, which is sensed by the relative pressure sensor.

Abstract: A passenger detection system for a person on a seat of a vehicle, includes a long range capacitance sensor for measuring a long range capacitance between a seating portion of the seat and a body of the vehicle and a short range capacitance sensor for measuring a short range capacitance in the seat, and a detection unit for detecting a passenger on the seat based on the measured long range capacitance and the measured short range capacitance. Therefore, the passenger detection system accurately detects a passenger on the seat of the vehicle while suppressing a detection error caused by an external effect.

Abstract: An occupant sensing electrode is embedded in a seat. An empty seat capacitance reducing electrode is placed between the occupant sensing electrode and a seat frame of the seat in an opposed relationship to the occupant sensing electrode. A dielectric base film may be interposed between the occupant sensing electrode and the empty seat capacitance reducing electrode. The occupant sensing electrode may include a plurality of electrode portions. The electrode portions may include high potential electrode portions and low potential electrode portions.

Abstract: An occupant detecting system includes a temperature sensor that sequentially detects temperatures at a fixed position, a plurality of weight sensors disposed at predetermined positions of a seat to respectively provide weight signals, an occupant ECU. The ECU estimates temperatures of the weight sensors based on the temperatures sequentially detected by the temperature sensor and temperature characteristic data of the weight sensors relative to temperatures detected by the temperature sensor and corrects the weight signals based on the estimated temperatures.

Abstract: A capacitance type sensor installed in a vehicle includes the first electrode, the second electrode, and the third electrode. The first electrode is arranged inside a seating portion of a seat or a backrest portion of the seat, or both. The second electrode is arranged adjacent to the first electrode inside at least one of the seating portion and the backrest portion of the seat, whatever the first electrode is arranged. The second electrode forms an electric field together with the first electrode between them in a wetness determination mode in which a wet condition of the seat is determined. The third electrode forms an electric field together with the first and the second electrode between them in an occupant determination mode in which an occupant in the seat is determined.

Abstract: Each front sensor senses a load, which is applied to a front part of a seat, and each rear sensor senses a load, which is applied to a rear part of the seat. A size of an entire load sensing range of each front sensor is smaller than a size of an entire load sensing range of each rear sensor.

Abstract: An occupant sensing ECU determines an occupant state on a seat by comparing occupant determination threshold values with a corresponding sensed load data value, which is originated from load sensors. The ECU stores an adjustment value, which is used to adjust a predetermined design value of each of the occupant determination threshold values. The adjustment value is a difference between an empty-state 0 point load value and a predetermined design value of the empty-state 0 point load value.

Abstract: A passenger detection device for a vehicle is provided with multiple load sensors, each of which detects a load on a seat of the vehicle within a predetermined detection range of the load sensor, and an ECU that determines passenger information of the seat. The ECU has at least one calculation range, each of which limits the detection range of each corresponding one of the multiple load sensors. The ECU determines the passenger information based on a detection data value of each load sensor, which is outputted from the load sensor and falls within the corresponding calculation range of the load sensor.

Abstract: A seat occupation is judged with a load detector arranged at a seat for detecting a load on the seat and a seat condition detection means arranged at the seat for providing discrimination between an adult and a child seat on the seat. A judging means judges that a child seat is set on the seat when the load detection means detects the load corresponding to that of adult and the seat condition detection means detects that the child seat on the seat. The seat condition detection means may comprise an electrostatistic sensor for detecting a capacitance that is increased by the body of the passenger or a pressure detection element array arranged on the sitting portion. The detected capacitance or the pressure distribution is different between a child seat and an adult or a passenger.

Abstract: A seat occupation is judged with a load detector arranged at a seat for detecting a load on the seat and a seat condition detection means arranged at the seat for providing discrimination between an adult and a child seat on the seat. A judging means judges that a child seat is set on the seat when the load detection means detects the load corresponding to that of adult and the seat condition detection means detects that the child seat on the seat. The seat condition detection means may comprise an electrostatistic sensor for detecting a capacitance that is increased by the body of the passenger or a pressure detection element array arranged on the sitting portion. The detected capacitance or the pressure distribution is different between a child seat and an adult or a passenger.

Abstract: A seat belt fastening device has a seat belt buckle and a single casing in which a compression coil spring for pulling in slack of the seat belt is positioned between a retainer and a flange of a guide member. An inertial mass member is slidably disposed in the guide member. The coil spring is connected by a wire to a pulley unit through the retainer and guide member. The seat belt buckle is connected to the pulley unit by a wire. The wire is usually wound to the pulley unit which is locked by a control lever. When the inertial mass member moves under excessive deceleration, it drives operation levers and the control lever to unlock the pulley unit. As a result, the wire is pulled out from the pulley unit by the released compression spring. Incidentally, the wire is wound to the pulley unit so that the buckle is retracted into the casing and the slack of the seat belt is reduced.