Rotary Encoder with Built-in-Self-Test
First Claim
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1. A rotary encoder for use with a rotary device, the rotary encoder comprising:
- one or more encoding wheels, each of the one or more encoding wheels comprising at least one coding section operable to encode a position of the rotary device; and
at least one double set of sensors operable to monitor the at least one coding section.
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Abstract
A rotary encoder using built-in self test ability with redundant and fault tolerant position sensing. Wherein the rotary encoder is used with a variety of rotary equipment including a valve actuator including the generation of speed data (1). The use for diagnosing valve actuator problem and other rotary equipment includes the frequency analysis performed upon speed or position or torque or thrust or vibration data including the speed or position data of the valve provided by the rotary encoder.
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Citations
28 Claims
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1. A rotary encoder for use with a rotary device, the rotary encoder comprising:
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one or more encoding wheels, each of the one or more encoding wheels comprising at least one coding section operable to encode a position of the rotary device; and at least one double set of sensors operable to monitor the at least one coding section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An absolute encoder comprising:
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an input wheel configured to receive rotary input; a timing wheel capable of generating speed data and driven by the input wheel; a plurality of encoding wheels operably coupled to the timing wheel; and a plurality of sensors configured to sense the positions of the plurality of encoding wheels and the timing wheel, wherein each of the plurality of sensors includes a redundant sensor. - View Dependent Claims (16, 17, 18)
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19. A valve actuator comprising:
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an absolute encoder comprising; at least one encoder disk; a plurality of sensors operable to read the at least one encoder disk; a speed sensor operable to generate speed data; and at least one duplicate sensor for each of the plurality of sensors and the speed sensor; and a drive train adapted to drive the absolute encoder. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification