Corrosion sensor circuit
AssigneeMitsubishi Electric Corporation
InventorTakuma Aoshima
Life of this patent
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Abstract
A corrosion sensor circuit includes a microcontroller, corrosion sensors, resistors serving as pull-up resistors, and a resistor serving as a pull-down resistor. The corrosion sensors are connected to power terminals at their respective one ends. The resistors have their respective one ends connected respectively to respective opposite ends of the corrosion sensors and have their respective opposite ends connected to an input port of the microcontroller. The resistor is connected to the input port at one end and to ground at an opposite end, being connected to no corrosion sensors.
Claims18
A corrosion sensor circuit to detect a corrosion state of an apparatus, the corrosion sensor circuit comprising:
- a microcontroller;
- one or more corrosion sensors connected to an input port of the microcontroller;
- and
- one or more first resistors connected to the input port, each of the one or more first resistors being connected to each of the one or more corrosion sensors, respectively,
- wherein
- the one or more corrosion sensors include a first corrosion sensor, a second corrosion sensor that reacts to a property of a different corrosive substance compared with the first corrosion sensor, and a third corrosion sensor that reacts to a property of a different corrosive substance compared with the first corrosion sensor and the second corrosion sensor,
- the one or more first resistors include a first pull-up resistor connected to the first corrosion sensor, a second pull-up resistor connected to the second corrosion sensor, and a first pull-down resistor connected to the third corrosion sensor, and
- the corrosion sensor circuit further comprises a second resistor that is directly connected to the third corrosion sensor and is not directly connected to both the first corrosion sensor and the second corrosion sensor.
Dependencies are inferred from the claim text.