Foot weight alarm
First Claim
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1. A foot weight alarm device, comprising:
- a) a power supply which provides a regulated voltage;
b) at least one resistive force sensor, said resistive force sensor connected to said power supply and said resistive force sensor having a resistance which varies with the amount of weight applied to said resistive force sensor;
c) signal conditioning means connected to said resistive force sensor whereby said signal conditioning means produces a voltage-corresponding digital value which varies with the resistance of said resistive force sensor;
d) calibrating means connected to said signal conditioning means such that said calibrating means converts said voltage-corresponding digital value into a force-corresponding digital value whereby said force-corresponding digital value corresponds to the amount of weight to which said resistive force sensor is subjected;
e) programming means connected to said calibrating means whereby said programming means sets at least one weight limit in said calibrating means such that said calibrating means can compare said force-corresponding digital value to said weight limit;
f) alarm generating means which generates an alarm in response to said force-corresponding digital value; and
g) a housing wherein said signal conditioning means, said calibrating means, and said alarm generating means are housed but with said programming means being external thereto.
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Abstract
Device for alarming foot weight capable of operating without restricting an individual'"'"'s movement. The device comprising a power supply, at least one resistive force sensor, signal conditioning means, calibrating means, programming means and alarm generating means. The alarm generating means generates an alarm when the weight applied to the foot force sensor is at, within or above at least one weight limit or weight range.
52 Citations
21 Claims
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1. A foot weight alarm device, comprising:
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a) a power supply which provides a regulated voltage; b) at least one resistive force sensor, said resistive force sensor connected to said power supply and said resistive force sensor having a resistance which varies with the amount of weight applied to said resistive force sensor; c) signal conditioning means connected to said resistive force sensor whereby said signal conditioning means produces a voltage-corresponding digital value which varies with the resistance of said resistive force sensor; d) calibrating means connected to said signal conditioning means such that said calibrating means converts said voltage-corresponding digital value into a force-corresponding digital value whereby said force-corresponding digital value corresponds to the amount of weight to which said resistive force sensor is subjected; e) programming means connected to said calibrating means whereby said programming means sets at least one weight limit in said calibrating means such that said calibrating means can compare said force-corresponding digital value to said weight limit; f) alarm generating means which generates an alarm in response to said force-corresponding digital value; and g) a housing wherein said signal conditioning means, said calibrating means, and said alarm generating means are housed but with said programming means being external thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A foot weight alarm device, comprising:
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a) a foot force sensor; b) at least one resistive force sensor located on said foot force sensor, said resistive force sensor having a resistance which varies with the amount of force applied thereto; c) a power supply which provides regulated voltage to said resistive force sensor such that a force-varying voltage is present across said resistive force sensor; d) signal conditioning means connected to said resistive force sensor whereby said signal conditioning means comprises an analog-to-digital converter, said analog-to-digital converter converts said force-varying voltage to a voltage-corresponding digital value which varies with the resistance of said resistive force sensor; e) calibrating means connected to said signal conditioning means whereby said calibrating means comprises a linearization table and whereby said calibrating means converts said voltage-corresponding digital value into a force-corresponding digital value by comparing said voltage-corresponding digital value to said linearization table such that said force-corresponding digital value corresponds to the amount of weight to which said resistive force sensor is subjected, and combines said force-corresponding digital value for each said resistive force sensor such that said force-corresponding digital value reflects the weight applied to said foot force sensor; f) programming means connected to said calibrating means whereby said programming means sets at least one weight limit and said linearization table in said calibrating means such that said calibrating means can compare said force-corresponding digital value to said weight limit; g) alarm generating means which generates an alarm in response to said force-corresponding digital value; and h) a housing wherein said signal conditioning means, said calibrating means, and said alarm generating means are housed but with said programming means being external thereto. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification