Title:
INDUCTIVE SENSOR CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2015/152585
Kind Code:
A1
Abstract:
The purpose of the present invention, which relates to an inductive sensor circuit, is to improve the response speed of detecting and outputting the position of the cylinder exhaust valve of an engine. To this end, the inductive sensor circuit according to one embodiment of the present invention comprises: a detection circuit unit comprising a condenser, which is connected in parallel to the inductor of an inductive sensor and forms an oscillation circuit, a first operational amplifier for receiving as an input and amplifying the electrical signal of an oscillation waveform generated by the oscillation circuit, a rectifier circuit for receiving as an input and rectifying the signal amplified by the first operational amplifier, and a smoothing circuit for smoothing and outputting the signal rectified by the rectifier circuit; a linearization circuit unit comprising a plurality of piecewise linear circuits for receiving as inputs a signal of the detection circuit unit and a preset reference voltage, signal-processing same in a piecewise linear manner, and outputting a linearized signal; an output circuit unit comprising a second operational amplifier for receiving as an input the signal output by the linearization circuit unit and reading and outputting a code, a zero adjustment circuit for adjusting the zero point of the signal output by the second operational amplifier and the maximum value of the zero point, and a third operational amplifier for amplifying the signal input by the zero adjustment circuit and transmitting the amplified signal to an external output terminal; and a power circuit unit for providing a constant voltage for circuit operation and supplying the reference voltage to the linearization circuit unit.
Inventors:
JUNG KYEONG-JIN (KR)
Application Number:
PCT/KR2015/003111
Publication Date:
October 08, 2015
Filing Date:
April 02, 2015
Export Citation:
Assignee:
KEUMYANG IND CO LTD (KR)
International Classes:
G01D5/20; G01B7/14; G01B7/30
Foreign References:
| KR20110127395A | 2011-11-25 | |||
| KR20010029864A | 2001-04-16 | |||
| JP2012095446A | 2012-05-17 | |||
| JP2002305873A | 2002-10-18 |
Attorney, Agent or Firm:
PUKYUNG INTERNATIONAL PATENT AND LAW FIRM (KR)
특허법인 부경 (KR)
특허법인 부경 (KR)
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