Steering wheel grip detection device

    公开(公告)号:US10689022B2

    公开(公告)日:2020-06-23

    申请号:US15571832

    申请日:2016-03-16

    Abstract: A steering wheel grip detection device includes a positive electrode terminal electrically connected to a positive electrode of a power source and a negative electrode terminal electrically connected to a negative electrode of the power source. The steering wheel grip detection device further includes a thermostat, a heater, and an inductance element that are electrically connected with one another in this order in series wiring from the positive electrode terminal to the negative electrode terminal, as well as a capacitor through which a wiring path from the thermostat to the heater is electrically connected with the negative electrode terminal. The steering wheel grip detection device has an electrostatic sensor circuit that is electrically connected with a wiring path from the inductance element to the heater and that detects a grip on a steering wheel by a capacitance value of the heater.

    Steering wheel heater device
    6.
    发明授权

    公开(公告)号:US10449989B2

    公开(公告)日:2019-10-22

    申请号:US14890148

    申请日:2014-12-04

    Abstract: A steering wheel heater device including: a steering wheel heater configured of an electrical resistor which produces heat by electrical energy; an inductor; at least one switch; and a sensor circuit, wherein the inductor is connected in series to a first terminal of the steering wheel heater, the at least one switch turns on and off the supply of power to the steering wheel heater, the sensor circuit is electrically connected to the first terminal and determines whether a detected subject is in contact with a steering wheel based on a magnitude of capacitance of the steering wheel heater, and the at least one switch is at least one of a switch connected in series to the first terminal of the steering wheel heater via the inductor and a switch connected in series to a second terminal of the steering wheel heater.

    Capacitive sensor and grip sensor

    公开(公告)号:US10895656B2

    公开(公告)日:2021-01-19

    申请号:US16480393

    申请日:2018-02-01

    Abstract: Capacitive sensor includes sensor electrode, sensor circuit that is electrically connected to sensor electrode measures capacitance of sensor electrode, first impedance element, noise detection circuit that is electrically connected to sensor electrode through first impedance element and measures noise, and control circuit that switches between on and off of each of sensor circuit and noise detection circuit. Control circuit causes sensor circuit to measure the capacitance of sensor electrode by turning on sensor circuit and by turning off noise detection circuit and control circuit causes noise detection circuit to measure the noise by turning off sensor circuit and by turning on noise detection circuit.

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