In-line rotating capacitive torque sensor
This invention is comprised of a proximity sensor based on a closed field circuit. The circuit comprises a ring oscillator using a symmetrical array of plates that creates an oscillating displacement current. The displacement current varies as a function of the proximity of objects to the plate array. Preferably the plates are in the form of a group of three pair of symmetric plates having a common center, arranged in a hexagonal pattern with opposing plates linked as a pair. The sensor produces logic level pulses suitable for interfacing with a computer or process controller. The proximity sensor can be incorporated into a load cell, a differential pressure gauge, or a device for measuring, the consistency of a characteristic of a material where a variation in the consistency causes the dielectric constant of the material to change.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7756669
- Application Number:
- ON: DE94003063; PAN: 7-756,669
- OSTI ID:
- 140154
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
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In-line rotating capacitive torque sensor