Detector and message annunciator device
First Claim
1. An integral and manually transportable apparatus for detecting the presence of persons within a predetermined distance and generating a predetermined audio message upon said detection, said apparatus comprising:
- (a) sensor means for generating a signal indicating the presence of at least one person within a dynamically variable predetermined distance, wherein said predetermined distance may be dynamically varied by an operator;
(b) logic circuit means coupled to said sensor means for generating at least one control signal for starting and stopping the playback of a prerecorded message; and
(c) playback means for storing said prerecorded message and playing back said message upon receipt of said at least one control signal.
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Accused Products
Abstract
An apparatus for detecting the presence of people and generating an audio message and/or a video display directed to the person or persons whose presence has been detected. Message delivery is focused since the message is intended only for persons in the immediate vicinity of the subject of the message, and message repetition must be controlled to avoid constant repeating of the message during periods of high traffic. The invented apparatus implements the foregoing requirements by the use of a passive infra-red detector with a variable range control adjustable from approximately two feet to ten feet to preclude detection outside of an immediate, focused vicinity. In one embodiment, an EPROM message cartridge which may be plugged into the unit is used to store a message. The cartridges are removable so that they may be rerecorded using standard EPROM programming techniques. Alternatively, the recording medium may be built into the apparatus. Additionally, an annunciator variable pause interval timer is used to provide a preselected and adjustable pause between annunciated messages so that triggering of the message is inhibited during that pause.
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Citations
17 Claims
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1. An integral and manually transportable apparatus for detecting the presence of persons within a predetermined distance and generating a predetermined audio message upon said detection, said apparatus comprising:
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(a) sensor means for generating a signal indicating the presence of at least one person within a dynamically variable predetermined distance, wherein said predetermined distance may be dynamically varied by an operator; (b) logic circuit means coupled to said sensor means for generating at least one control signal for starting and stopping the playback of a prerecorded message; and (c) playback means for storing said prerecorded message and playing back said message upon receipt of said at least one control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integral and manually transportable apparatus for detecting the presence of persons within a predetermined distance and generating a predetermined visual message upon said detection, said apparatus comprising:
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(a) sensor means for generating a signal indicating the presence of at least one person within a dynamically variable predetermined distance, wherein said predetermined distance may be dynamically varied by an operator; (b) logic circuit means coupled to said sensor means for generating at least one control signal; and (c) display means coupled to said logic circuit means for displaying a visual image upon receipt of said at least one control signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification