Title:
WIRELESS COMPOSITE SENSOR
Document Type and Number:
Japanese Patent JP2015175845
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wireless composite sensor for suppressing exhaustion of the battery of a two-wire type remote temperature sensor and alleviate the influence of the external electromagnetic induction noise to be overlapped with a connection cable of the two-wire type remote temperature sensor, and not exceeding an input upper limit value of an ADC of a wireless module in a conventional wireless composite sensor.SOLUTION: An power source 11 of a two-wire type remote temperature sensor is turned on/off by synchronizing with an ON/SLEEP signal 10 which determines a sleep state of a wireless module sensor, and power sources of a voltage follower and a two-wire type remote temperature sensor 13 are separated and driven so as to alleviate the influence of an external electromagnetic induction noise to be overlapped with a connection cable of the two-wire type remote temperature sensor 13, and a plurality of diodes connected in series is connected in parallel to a bleed resistance, and no excessive voltage is added to an input part of an ADC by applying the characteristics by which a forward voltage of the diode depends on a voltage to be applied.
Inventors:
ENOKI KOICHI
Application Number:
JP2014077334A
Publication Date:
October 05, 2015
Filing Date:
March 17, 2014
Export Citation:
Assignee:
ENOKI KOICHI
International Classes:
G01K1/02; G01J1/42; H03K17/945
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