Tamper-proof bracelet for home arrest system
AssigneeCincinnati Microwave, Inc.
InventorsJim McCurdy, Michael Doyle, Michael McLaughlin
Life of this patent
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Abstract
A personnel monitoring apparatus has a transmitter for transmitting a data encoded signal. A strap is provided for coupling the transmitter to a person to be monitored. An emitter is attached to the transmitter for emitting an optical signal. A detector is attached to the transmitter for detecting the optical signal. An optical fiber is incorporated with the strap for optically coupling the emitter and the detector. A comparator compares the optical signal and a reference signal, and the result of the comparison sets the value of a preselected data bit in the data encoded signal.
Claims4
A personnel monitoring apparatus, comprising:
- a housing having a pair of slots each having a clear window therein;
- a strap having two ends each for coupling to a respective slot;
- an optical fiber incorporated with the strap and having two ends each adapted to be optically aligned with respective windows upon coupling of the strap;
- and
- a circuit board mounted inside the housing and comprising:
- first means for transmitting a data encoded signal comprised of a plurality of data bits;
- second means adjacent one of said windows for emitting an optical signal;
- third means adjacent the other of said windows for detecting an optical signal;
- fourth means for comparing the detected optical signal to a reference signal, wherein a preselected one of said data bits has a value that is dependent on the result of said comparison.
A personnel monitoring apparatus, comprising:
- a housing having a first slot and a second slot formed therein;
- a first window centered in the first slot;
- a second window centered in the second slot;
- a transmitter affixed inside the housing for generating and transmitting a plurality of data bits;
- an optical emitter affixed inside the housing and directed such that an optical signal is emitted through the first window;
- an optical detector affixed inside the housing and directed such that the optical signal is detected through the second window;
- a strap adapted to be secured inside the first slot and the second slot;
- and
- an optical fiber incorporated with the strap for optically coupling the optical emitter to the optical detector;
- a comparator coupled to the optical detector and to the transmitter for comparing the optical signal to a reference signal, wherein a preselected one of said data bits has a value that is dependent on the result of said comparison.
Dependencies are inferred from the claim text.