Sash sensor and method of sensing a sash using an array of multiplexed elements
First Claim
Patent Images
1. A sash sensor for a sash in a frame, comprising:
- an array of multiplexed sensor elements; and
at least one indicator element which interacts with two or more sensor elements of the array of sensor elements to affect a signal detected thereby.
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Abstract
A fume hood sash sensor uses multiplexed sensors to measure sash position. The sensor transmitter or receiver elements may be multiplexed. Furthermore, the sensor may employ passive, passive remote powered transponder, or powered transponder elements on the sashes to measure sash position.
70 Citations
50 Claims
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1. A sash sensor for a sash in a frame, comprising:
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an array of multiplexed sensor elements; and at least one indicator element which interacts with two or more sensor elements of the array of sensor elements to affect a signal detected thereby. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of sensing a sash within a frame, the method comprising:
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receiving a signal at a plurality of positions along the frame; and detecting an effect on the signal detected of a passive element which moves when the sash moves;
whereinthe step of receiving is multiplexed so the signal is independently detected at each position. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50)
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Specification