Surface-area pressure transducer and line-selection circuit for use therewith
First Claim
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1. A surface-area-pressure transducer comprising:
- at least one pair of electrode layers each including a plurality of electrically-conductive elements, the elements of one layer extending in spaced, crossing relationship to the elements of the other layer;
and a compressively-deformable dielectric layer interposed between the two electrode layers to define therewith an array of capacitors whose capacitances are changed by the compression of said dielectric layer when subjected to pressure;
characterized in that said dielectric layer is composed of fibers selected from the group consisting of nylon, glass and paper.
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Abstract
A surface-area-pressure transducer comprises: at least one pair of electrode layers each including a plurality of electrically-conductive elements, the elements of one layer extending in spaced, crossing relationship to the elements of the other layer; and a compressively-deformable dielectric layer composed of fibers interposed between the two electrode layers to define therewith an array of capacitors whose capacitances are changed by the compression of said dielectric layer when subjected to pressure. Also described is a line-selector circuit for individually selecting each capacitor for measurement without electrical cross-talk from the other capacitors.
98 Citations
19 Claims
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1. A surface-area-pressure transducer comprising:
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at least one pair of electrode layers each including a plurality of electrically-conductive elements, the elements of one layer extending in spaced, crossing relationship to the elements of the other layer; and a compressively-deformable dielectric layer interposed between the two electrode layers to define therewith an array of capacitors whose capacitances are changed by the compression of said dielectric layer when subjected to pressure; characterized in that said dielectric layer is composed of fibers selected from the group consisting of nylon, glass and paper. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A selector circuit for individually measuring an electrical parameter of any one of a plurality of electrical devices in a matrix including a group of X-lines each connected to one side of each electrical device, and a group of Y-lines each connected to the opposite side of each electrical device to define a matrix of cross-over points between the two groups of lines;
- and a selector circuit selectively connecting the individual electrical devices of the array of electrical devices to a measuring device, comprising;
a bistable device switchable to provide a high voltage output or a low voltage output; a high input impedance device connected to the input of said bistable device; a measuring line connected to the input side of said high input impedance device; a neutralizing line connected to the output side of said high input impedance device between same and said bistable device; an electrical measuring circuit connected between the output of said bistable device and the measuring line at its connection to the high input impedance device; and selective switching means including an X-switch in each of said X-lines and a Y-switch in each of said Y-lines; each of said X-switches normally connecting all said X-lines to said neutralizing line but effective to connect the X-line of a selected electrical device to the measuring line; each of said Y-switches normally connecting all said Y-lines to said neutralizing line but effective to connect the Y-line of the selected electrical device to a reference potential. - View Dependent Claims (16, 17, 18, 19)
- and a selector circuit selectively connecting the individual electrical devices of the array of electrical devices to a measuring device, comprising;
Specification