Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-12-08
1989-01-17
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340 59, 73304R, G08B 2100
Patent
active
047990473
ABSTRACT:
A liquid level detecting and indicating system for detecting a liquid level of a measured object such as fuel on the basis of a resistance changed in accordance with level variation of the measured object and indicating the liquid level in response to a magnetic field produced to correspond to the resistance. The system comprises a gauging circuit coupled through a switch to a battery and including a bridge circuit comprising at least a variable resistor and two groups of coils, the variable resistor being arranged such that its resistance is changed in accordance with the level variation of the measured object. Also included in the system is a disturbance detecting circuit coupled to one end of the variable resistor of the gauging circuit for comparing the voltage thereof with a reference to detect a abrupt variation of the voltage at the one end of the variable resistor and generating a control signal in accordance with the result of the detection. In response to the control signal therefrom, a potential control circuit controls the magnitude of the voltage at the end of the variable resistor in order to remove the abrupt variation of the voltage thereat, thus preventing level pointer from swinging severely due to vibration of the measured object.
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Jackson Jill D.
Nippondenso Co. Ltd.
Orsino Joseph A.
Toyota Jidosha & Kabushiki Kaisha
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