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公开(公告)号：US10054509B2
公开(公告)日：2018-08-21
申请号：US15129659
申请日：2015-03-25
CPC分类号： G01L23/10 , F02D35/023 , G01L9/08 , G01L23/225
摘要： There is provided a pressure detection device (10) including: a pressure detection element (21) which receives pressure (P) so as to output a detection signal (Qi) corresponding to the pressure (P); and a processing circuit (30) which processes and outputs the detection signal (Qi) output from the pressure detection element (21), where on a circuit board (40) on which a conductor pattern is formed, an integrated circuit (IC1) including an analog circuit which uses a reference voltage (Vr) set to a predetermined voltage value as an operation reference and converts the detection signal (Qi) into a voltage waveform is mounted, and the processing circuit (30) includes an input circuit 50 which feeds the detection signal (Qi) to the integrated circuit (IC1) and a shield pattern (SHP1) which surrounds the region of at least a part of the input circuit (50) and to which the reference voltage (Vr) is applied.
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公开(公告)号：US11041776B2
公开(公告)日：2021-06-22
申请号：US15129642
申请日：2015-03-25
发明人： Masanori Yomoyama
摘要： There is provided a pressure detection device including: a pressure detection element which receives pressure so as to output a detection signal corresponding to the pressure P; and a processing circuit which processes and outputs the detection signal output from the pressure detection element, where the processing circuit includes: a voltage transformation circuit which only transforms a power supply voltage fed from an external power supply so as to obtain a first reference voltage with a predetermined voltage value; an integrator circuit which uses the first reference voltage as an operation reference to perform integral processing on the detection signal so as to convert the detection signal into a voltage waveform; and at least one or more amplifier circuits which use a second reference voltage with a predetermined voltage value as an operation reference to perform amplification processing on an output signal from the integrator circuit.
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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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公开(公告)号：US09945750B2
公开(公告)日：2018-04-17
申请号：US15129667
申请日：2015-03-25
摘要： A processing circuit is provided which includes at least an integrator circuit which uses a reference voltage set to have a predetermined magnitude as an operation reference and which integrates a detection signal so as to convert the detection signal into a voltage waveform and a base voltage adjustment circuit which is connected between an input terminal and an output terminal of the integrator circuit and which adjusts the magnitude of a base voltage that is a potential when the detection signal in an output signal output from the integrator circuit is not present. As another form, a processing circuit can be adopted which includes at least one or more amplifier circuits which amplify an output signal from an integrator circuit and a base voltage adjustment circuit which is connected between a supply portion of a reference voltage fed to the amplifier circuit and an input terminal of at least one of the amplifier circuits and which adjusts the magnitude of a base voltage that is a potential when a detection signal in an output signal output from the amplifier circuit is not present.
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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：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：US10221782B2
公开(公告)日：2019-03-05
申请号：US15021735
申请日：2015-03-26
摘要： An in-cylinder pressure detecting apparatus for detecting a pressure in a combustion chamber of an internal combustion engine is provided. The in-cylinder pressure detecting apparatus comprises a pressure detecting element mounted on a tip-portion of a fuel injection device which injects fuel into the combustion chamber, and an amplifying circuit unit having an amplifying circuit which amplifies a signal output from the pressure detecting element and outputs a pressure detection signal. An in-cylinder pressure detecting unit integrated fuel injection device is configured by integrating an in-cylinder pressure detecting unit with the fuel injection device. The in-cylinder pressure detecting unit includes the pressure detecting element, the amplifying circuit unit, and a connecting member connecting the pressure detecting element with the amplifying circuit unit. The in-cylinder pressure detecting unit integrated fuel injection device is mounted on the internal combustion engine.
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公开(公告)号：US11506555B2
公开(公告)日：2022-11-22
申请号：US16086402
申请日：2017-03-21
发明人： Rikoku Nakamura , Masanori Yomoyama
IPC分类号： G01L9/06 , G01L27/00 , H01L41/113 , G01L23/10 , G01L9/08
摘要： In piezoelectric sensors, conventional amplification factor adjustment methods involving the cutting of a wiring pattern or use of a laser trimmable resistor are unable to adjust the amplification factor when the sensor is in a completed state. As a result, the production process becomes complex and production costs increase. Further, because the amplification factor adjustment is carried out in a different state from that of the finished product, the problem that the amplification factor is not set correctly in the finished product also occurs. A non-volatile memory is incorporated in an integrated circuit in which there are integrated piezoelectric sensor circuit elements. The amplification factor is adjusted by writing data from a writing terminal to change an amplification resistor a.
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