SENSOR SIGNAL DETECTION DEVICE
First Claim
1. A sensor signal detection device comprising:
- a sensor element;
a temperature detection element that is connected in series with the sensor element;
a constant voltage power supply that applies a constant voltage to a series circuit of the sensor element and the temperature detection element;
a short-circuit switch that short-circuits both terminals of the temperature detection element; and
a controller that controls a changeover, in a time division manner, between a sensor detection state in which a sensor signal of the sensor element is obtained by turning on the short-circuit switch so as to apply the constant voltage across both terminals of the sensor element from the constant voltage power supply and a temperature detection state in which a temperature detection signal of the temperature detection element is obtained by turning off the short-circuit switch so as to connect the temperature detection element to the sensor element in series and to apply the constant voltage to the series circuit from the constant voltage power supply.
1 Assignment
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Accused Products
Abstract
Sensor signal detection device includes: a sensor element; a temperature detection element connected in series with the sensor element; a constant voltage power supply applying constant voltage to a series circuit of the temperature detection element and the sensor element; a short-circuit switch short-circuiting both terminals of the temperature detection element; and a controller controlling a changeover between a sensor detection state and a temperature detection state. In the sensor detection state, a sensor signal from the sensor element is obtained by turning on the short-circuit switch to apply the constant voltage across both terminals of the sensor element from the constant voltage power supply. In the temperature detection state, a temperature detection signal of the temperature detection element is obtained by turning off the short-circuit switch to connect the temperature detection element to the sensor element in series and applying constant voltage from the constant voltage power supply.
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Citations
11 Claims
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1. A sensor signal detection device comprising:
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a sensor element; a temperature detection element that is connected in series with the sensor element; a constant voltage power supply that applies a constant voltage to a series circuit of the sensor element and the temperature detection element; a short-circuit switch that short-circuits both terminals of the temperature detection element; and a controller that controls a changeover, in a time division manner, between a sensor detection state in which a sensor signal of the sensor element is obtained by turning on the short-circuit switch so as to apply the constant voltage across both terminals of the sensor element from the constant voltage power supply and a temperature detection state in which a temperature detection signal of the temperature detection element is obtained by turning off the short-circuit switch so as to connect the temperature detection element to the sensor element in series and to apply the constant voltage to the series circuit from the constant voltage power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification