Sensor for measuring changes in ambient conditions
First Claim
1. A sensor comprising:
- a first conductor connected to a first source terminal;
a second conductor connected to a first return terminal;
a semi-conductive layer with a predetermined resistance located between said first and second conductors; and
a resistance measurement device, wherein said predetermined resistance changes in response to a change in pressure or temperature.
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Abstract
The present invention relates to a sensor, which includes a conductor connected to a source terminal, while a second conductor is connected to a return terminal. Between the two conductors resides a semi-conductive layer with a predetermined resistance. A resistance measurement device determines how the predetermined resistance of the semi-conductive layer changes in response to a change in pressure or temperature. Also, included is a sensor with integral fault detection. The present invention also relates more generally to a coaxial cable, which includes a semi-conductive layer between two conductors. The present invention also incorporates a method of sensing pressure or temperature by measuring a change in resistance of a semi-conductive layer.
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Citations
23 Claims
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1. A sensor comprising:
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a first conductor connected to a first source terminal;
a second conductor connected to a first return terminal;
a semi-conductive layer with a predetermined resistance located between said first and second conductors; and
a resistance measurement device, wherein said predetermined resistance changes in response to a change in pressure or temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device comprising:
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a first conductor;
a second conductor; and
a semi-conductive layer located between said first and second conductors;
wherein said first and second conductors are coaxial. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of sensing changes in ambient conditions, comprising:
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passing electricity through a semi-conductive layer with a predetermined resistance;
measuring a change in the predetermined resistance in response to a change in pressure or temperature. - View Dependent Claims (20, 21, 22, 23)
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Specification