Abstract: An output circuit of a charge mode sensor includes a second resistor and an operational amplifier. The second resistor connects an output portion of the charge mode sensor and a ground. The operational amplifier is configured to output a detection signal that varies in accordance with an amount of charge kept in the charge mode sensor. The operational amplifier includes an inverting input portion, a non-inverting input portion, and an output portion. The inverting input portion is connected to the output portion of the charge mode sensor via a sensor cable. The non-inverting input portion is connected to a reference voltage. The output portion is connected to the inverting input portion via a first resistor.

Abstract: An output circuit of a charge mode sensor includes a second resistor and an operational amplifier. The second resistor connects an output portion of the charge mode sensor and a ground. The operational amplifier is configured to output a detection signal that varies in accordance with an amount of charge kept in the charge mode sensor. The operational amplifier includes an inverting input portion, a non-inverting input portion, and an output portion. The inverting input portion is connected to the output portion of the charge mode sensor via a sensor cable. The non-inverting input portion is connected to a reference voltage. The output portion is connected to the inverting input portion via a first resistor.

Abstract: A sensor assembly includes a elongate article and a plurality of elongate piezoelectric elements provided to the elongate article. Each of the piezoelectric elements is configured so that when a load is applied in a direction perpendicular to a surface of the piezoelectric element, a short axis direction of the piezoelectric element becomes a sensitivity direction in which a voltage is generated, and a major axis direction becomes a non-sensitivity direction in which a voltage is not generated.

Abstract: A sensor module mounted on a vehicle body includes a base plate, a sensor and a signal processing unit. The sensor includes a plurality of piezoelectric films for detecting an external force applied to the vehicle body. The signal processing unit is connected to the sensor for processing sensor signals output from the sensor. The sensor and the signal processing unit are attached to the base plate.

Abstract: A deformation detection sensor including: a piezoelectric element which generates an output signal due to a deformation; a reference signal input device which inputs a reference signal of a predetermined cycle to the piezoelectric element; a first signal extraction device which extracts a first output signal due to the deformation of the piezoelectric element out of an output signal from the piezoelectric element; a second signal extraction device which extracts a second output signal due to the reference signal out of the output signal from the piezoelectric element; a first evaluation device which evaluates the first output signal extracted by the first signal extraction device; and a second evaluation device which evaluates the second output signal extracted by the second signal extraction device.

Abstract: A sensor assembly includes a elongate article and a plurality of elongate piezoelectric elements provided to the elongate article. Each of the piezoelectric elements is configured so that when a load is applied in a direction perpendicular to a surface of the piezoelectric element, a short axis direction of the piezoelectric element becomes a sensitivity direction in which a voltage is generated, and a major axis direction becomes a non-sensitivity direction in which a voltage is not generated.

Abstract: A passenger protection system for a vehicle having a door opening to which a door is attached. The system has an airbag attached in a folded form along an upper edge of the door opening, wherein when being expanded, the airbag is deployed along an inner side surface of an interior of the vehicle in a drawn curtain form; a contact detecting device for detecting a contact action of a passenger in the vehicle with the contact detecting device; and a control device for determining whether a passenger is close to the inner side surface based on a result of detection of the contact detecting device, and prohibiting deployment of the airbag while determining that a passenger is close to the inner side surface. The contact detecting device may have an elongated form in a length direction of the vehicle and consist of divided portions separated in a vertical direction.

Abstract: A deformation detection sensor including: a piezoelectric element which generates an output signal due to a deformation; a reference signal input device which inputs a reference signal of a predetermined cycle to the piezoelectric element; a first signal extraction device which extracts a first output signal due to the deformation of the piezoelectric element out of an output signal from the piezoelectric element; a second signal extraction device which extracts a second output signal due to the reference signal out of the output signal from the piezoelectric element; a first evaluation device which evaluates the first output signal extracted by the first signal extraction device; and a second evaluation device which evaluates the second output signal extracted by the second signal extraction device.

Abstract: A sensor module mounted on a vehicle body includes a base plate, a sensor and a signal processing unit. The sensor includes a plurality of piezoelectric films for detecting an external force applied to the vehicle body. The signal processing unit is connected to the sensor for processing sensor signals output from the sensor. The sensor and the signal processing unit are attached to the base plate.

Abstract: A passenger protection system for a vehicle having a door opening to which a door is attached. The system has an airbag attached in a folded form along an upper edge of the door opening, wherein when being expanded, the airbag is deployed along an inner side surface of an interior of the vehicle in a drawn curtain form; a contact detecting device for detecting a contact action of a passenger in the vehicle with the contact detecting device; and a control device for determining whether a passenger is close to the inner side surface based on a result of detection of the contact detecting device, and prohibiting deployment of the airbag while determining that a passenger is close to the inner side surface. The contact detecting device may have an elongated form in a length direction of the vehicle and consist of divided portions separated in a vertical direction.