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公开(公告)号：US10718681B2
公开(公告)日：2020-07-21
申请号：US16082362
申请日：2017-02-27
发明人： Yuta Kanamori , Tetsuya Aiba , Masanori Yomoyama , Satoshi Sue
摘要： A pressure detecting device that detects the combustion pressure in an internal combustion engine includes: a piezoelectric element that outputs a charge signal corresponding to the pressure in a combustion chamber; and a mounting board on which are mounted an integrating circuit that integrates the charge signal outputted by the piezoelectric element and an amplifier circuit that amplifies a voltage signal obtained by integration. On the mounting board are provided: a power receiving terminal that receives a power-supply voltage from a controller; an output terminal that outputs an output signal after amplification to the controller; and a grounding terminal for making the ground of the controller and the mounting board common. Furthermore, in the mounting board, the grounding terminal and grounding ends of the integrating circuit and the amplifier circuit are connected by way of grounding ferrite beads.
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公开(公告)号：US10996127B2
公开(公告)日：2021-05-04
申请号：US16079254
申请日：2017-02-21
发明人： Yuta Kanamori , Masanori Yomoyama , Tetsuya Aiba , Ikuo Takahashi , Hiroshi Nakagawa , Kazuo Takahashi , Yusuke Satoh
摘要： A pressure detection device includes: a piezoelectric element that detects a pressure change via a diaphragm head or the like; a circuit board that is provided with a processing circuit that performs electrical processing with respect to a charge signal outputted from the piezoelectric element; a conductive housing member, which has conductivity and is disposed to cover (house) the circuit board, and which is connected to the ground of the circuit board; and a housing (a leading end side housing, the diaphragm head and a rear end side housing), which houses the piezoelectric element, the circuit board and the housing member, and which is electrically insulated from the piezoelectric element, the circuit board and the housing member.
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公开(公告)号：US10247634B2
公开(公告)日：2019-04-02
申请号：US15129713
申请日：2015-03-25
摘要： A disconnection detection circuit includes: a pull-up resistor to which the detection signal is fed and which connects a signal line connected to the wiring cable to a power supply or a pull-down resistor which connects the signal line to a GND; and a voltage clip circuit 105 which includes a high-voltage clip circuit which is connected between the signal line and the power supply and which clips the voltage of the signal line to the maximum specified voltage and a low-voltage clip circuit which is connected between the signal line and the GND and which clips the voltage of the signal line to the minimum specified voltage.
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