EP0066691A2
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EP
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Lighting control system and method
Assignee: KESSER ELECTRONICS INTERNATIONAL Inc
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Filing: 1982-04-08
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Granted: —
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Expires: 2002-04-08
Abstract
Abstract A lighting control circuit responsive to amplitude variations related to the effects of movement on the reflection of electromagnetic energy at an ultrasonic frequency.
Inventors
- 👤 Charly Barnum
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:41
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/16; G08B13/1609; G08B13/1618; G08B13/1627; H; H05; H05B; H05B47/00; H05B47/10; H05B47/105; H05B47/115; Y; Y02; Y02B; Y02B20/00; Y02B20/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
119 words
A lighting system for a space characterized by: a) a source of illumination for the space; b) a control circuit for said source of illumination; c) means for radiating electromagnetic energy at an ultrasonic frequency and at a constant amplitude into the space to be monitored; d) means for detecting electromagnetic energy reflected from the objects in the space, said energy being in the form of the radiated ultrasonic energy modulated by a signal representing any motion within the space, said means providing an electrical signal; e) means for automatically controlling the gain of said electrical signal; and f) means for detecting variations in the amplitude of said electrical signal and for generating a control signal in response thereto.
Claim 2
Dependent Claim
119 words
A lighting system for a space characterized by: a) a source of illumination for the space; b) a control circuit for said source of illumination; c) means for radiating electromagnetic energy at an ultrasonic frequency and at a constant amplitude into the space to be monitored; d) means for detecting electromagnetic energy reflected from the objects in the space, said energy being in the form of the radiated ultrasonic energy modulated by a signal representing any motion within the space, said means providing an electrical signal; e) means for automatically controlling the gain of said electrical signal; and f) means for detecting variations in the amplitude of said electrical signal and for generating a control signal in response thereto.
Claim 3
Dependent Claim
26 words
The system of claim 1 characterized in that said electromagnetic energy detecting means (34) and said electromagnetic energy radiating means (30) are mounted on orthogonal axis.
Claim 4
Dependent Claim
34 words
The system of claim 1 or 2 characterized in that said means (30) for radiating electromagnetic energy and said means (34) for detecting electromagnetic energy are both provided with a vibraction damping mounting (32,39).
Claim 5
Dependent Claim
43 words
The system of claim 1 characterized by a second electromagnetic energy detecting means spaced from said first mentioned electromagnetic energy detecting means for detecting electromagnetic energy reflected from objects in the space and for affecting the operation of said control signal generating means.
Claim 6
Dependent Claim
120 words
A lighting system for a space characterized. by: a) a source of illumination for the space; b) a control circuit for said source of illumination; c) means for radiating electromagnetic energy at an ultrasonic frequency and at a constant amplitude in the space; d) means for receiving electromagnetic energy reflected from the objects in the space and for providing a first signal in response thereto; e) a means for automatically controlling the gain of said first signal to provide a second signal; f) means for detecting predetermined variations in the amplitude of said second signal and to providing a control signal in response thereto; and g) manually operable means for selectively applying said control signal to said illumination control circuit.
Claim 7
Dependent Claim
120 words
A lighting system for a space characterized. by: a) a source of illumination for the space; b) a control circuit for said source of illumination; c) means for radiating electromagnetic energy at an ultrasonic frequency and at a constant amplitude in the space; d) means for receiving electromagnetic energy reflected from the objects in the space and for providing a first signal in response thereto; e) a means for automatically controlling the gain of said first signal to provide a second signal; f) means for detecting predetermined variations in the amplitude of said second signal and to providing a control signal in response thereto; and g) manually operable means for selectively applying said control signal to said illumination control circuit.
Claim 8
Dependent Claim
26 words
The system of claim 5, characterized in that said electromagnetic energy receiving means (34) and said electromagnetic energy radiating means (30) are mounted on orthogonal axis.
Claim 9
Dependent Claim
25 words
The system of claim 5 or 6, characterized in that said means (30) for radiating electromagnetic energy is provided with a vibraction damping mounting (32).
Claim 10
Independent Claim
42 words
The system of one of claims 5 to 7, characterized by a second means spaced from said first mentioned electromagnetic energy receiving means for receiving electromagnetic energy reflected from objects in the space, said automatic gain control means being independently responsive thereto.
Claim 11
Independent Claim
158 words
A method of controling a lighting circuit for a space characterized by the steps of: a) radiating electromagnetic energy into a space at a predetermined ultrasonic frequency and generally constant amplitude; b) detecting electromagnetic reflected from the space to provide a first signal; c) automatically adjusting the amplitude of said first signal to within predetermined limits; d) filtering out frequency components of the amplitude adjusted first signal other then the predetermined fequency; e) detecting amplitude excursions in excess of a predetermined limit to provide a reset signal and a first control signal; f) enabling a timing circuit responsively to each reset signal; g) applying the first control signal to the lighting circuit to effect the energization thereof; h) generating a second lighting circuit control signal responsively to the absense of a reset signal within a predetermined time period following each reset signal; and i) applying the second control signal to the lighting circuit to effect the denergization thereof.
Claim 12
Independent Claim
158 words
A method of controling a lighting circuit for a space characterized by the steps of: a) radiating electromagnetic energy into a space at a predetermined ultrasonic frequency and generally constant amplitude; b) detecting electromagnetic reflected from the space to provide a first signal; c) automatically adjusting the amplitude of said first signal to within predetermined limits; d) filtering out frequency components of the amplitude adjusted first signal other then the predetermined fequency; e) detecting amplitude excursions in excess of a predetermined limit to provide a reset signal and a first control signal; f) enabling a timing circuit responsively to each reset signal; g) applying the first control signal to the lighting circuit to effect the energization thereof; h) generating a second lighting circuit control signal responsively to the absense of a reset signal within a predetermined time period following each reset signal; and i) applying the second control signal to the lighting circuit to effect the denergization thereof.
Claim 13
Dependent Claim
32 words
The method of claim 9 characterized by the preliminary step of manually effecting the operation of an override circuit to thereby control the generation of at least one of the control signals.
References Cited (Backward Citations)
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