Dual sensitivity shock detector
AssigneeJon Snyder, Inc.
InventorsDouglas D. Snyder, Kevin Lipovsky
Life of this patent
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Abstract
An aftermarket mechanical shock detector for mounting to protected property containing an existing alarm system. The shock detector incorporates a piezoelectric transducer detecting mechanical vibration and generating an electrical vibration signal, and circuitry for comparing the vibration signal to thresholds. The shock detector includes two separately adjustable thresholds. If the vibration signal exceeds either threshold, the shock detector creates an electrical connection between two terminals, thereby triggering a previously-installed alarm circuit to create an alarm.
Claims19
An alarm system for protection of property, comprising:
- an alarm control circuit for responding to detection of first and second alarm conditions to respectively produce first and second different alarm signals,
- a vibration detector for electrically detecting mechanical vibration and producing an electrical vibration signal representative of said mechanical vibration, said vibration detector being mechanically coupled to said property,
- first and second detection circuits responsive to said vibration signal, said first and second detection circuits respectively generating first and second electrical threshold signals and comparing a common frequency band of said vibration signal to said first and second threshold signals, said first and second detection circuits coupled to said alarm control circuit for respectively signalling said first and second alarm conditions to said alarm control circuit if said vibration signal respectively exceeds in magnitude said first and second threshold signals.
A room lighting system, comprising
- a lighting control circuit for controlling illumination of lights in a room, said control circuit producing first and second light illuminations respectively in response to first and second room conditions,
- a vibration detector for electrically detecting mechanical vibration and producing an electrical vibration signal representative of said mechanical vibration, said vibration detector being mechanically coupled to said room,
- first and second detection circuits responsive to said vibration signal, said first and second detection circuits respectively generating first and second electrical threshold signals and comparing a common frequency band of said vibration signal to said first and second threshold signals, said first and second detection circuits coupled to said alarm control circuit for respectively signalling said first and second room conditions to said lighting control circuit if said common frequency band of said vibration signal respectively exceeds in magnitude said first and second threshold signals.
A method of protecting property with an alarm system, comprising:
- electrically detecting mechanical vibration of said property and producing an electrical vibration signal representative of said mechanical vibration,
- generating first and second electrical threshold signals,
- electrically comparing a common frequency band of said vibration signal to said first and second threshold signals, and signalling a first or a second alarm condition if said common frequency band of said vibration signal respectively exceeds said first and second threshold signals, and
- producing a first or a second alarm signal in response to a respective first or second alarm condition.
Dependencies are inferred from the claim text.