Control device and process for the contactless control of a unit, especially a plumbing unit
First Claim
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1. An electronic control device for contactless control of a plumbing unit, comprising:
- an actuating circuit connected to the unit; and
optical triangulation means including a transmitter for sending directed light signals and a receiving device for receiving signals reflected from a scanned object and for generating an actuation signal applied to said actuating circuit, said receiving device of said optical triangulation means including a background reflection portion receiving reflections predominantly from a background and a detection zone portion for receiving reflections predominantly from a predetermined detection zone, and comparison means for comparing the intensities of reflections received by said background reflection portion and said detection zone portion whereby said reflections received from said detection zone are discernable from reflections received from said background.
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Abstract
An electronic control device for the contactless control of a unit, e.g., a plumbing unit, especially a urinal, with at least one transmitter for sending directed light signals, and with a receiving device. The receiving device receives signals reflected from a scanned object and sends them to a circuit acting on the unit. The transmitter and the receiving device form an optical triangulation arrangement, wherein reflections are received from the background and from a predetermined detection zone to mask the said background.
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Citations
9 Claims
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1. An electronic control device for contactless control of a plumbing unit, comprising:
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an actuating circuit connected to the unit; and optical triangulation means including a transmitter for sending directed light signals and a receiving device for receiving signals reflected from a scanned object and for generating an actuation signal applied to said actuating circuit, said receiving device of said optical triangulation means including a background reflection portion receiving reflections predominantly from a background and a detection zone portion for receiving reflections predominantly from a predetermined detection zone, and comparison means for comparing the intensities of reflections received by said background reflection portion and said detection zone portion whereby said reflections received from said detection zone are discernable from reflections received from said background. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for the contactless control of a plumbing unit, comprising the steps of:
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transmitting directed light signals with a transmitter; positioning a receiving device for receiving signals reflected from an object positioned in the path of said directed light signals, said receiving device including a background receiving portion and a detection zone receiving portion; actuating the unit with a control circuit; and detecting reflected signals, from a background zone at said background receiving portion, said background spaced a distance from the receiver and detecting reflected signals from a predetermined detection zone at said detection zone receiving portion, said detection zone being positioned closer to said receiver than said background zone, and forming a difference between signals from said two zones to discern detection zone reflection signals from background zone signals.
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9. An electronic control device for contactless control of a plumbing unit comprising:
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an actuating circuit connected to the unit; and optical triangulation means, including a transmitter for sending directed light signals and a receiving device, said receiving device including a first receiver element and a second receiver element, said first receiver element being spaced a first distance from said transmitter and said second receiver element being spaced a second distance from said transmitter, whereby said first receiver element receives reflections predominantly from a background region and said second receiver element receives reflections predominantly from a detection zone, said detection zone being predefined and positioned closer to said transmitter than said background region and an actuating means for comparing the intensities of reflections received by said first receiver element and said second receiver element and generating an actuation signal when the intensity of reflection signals at said second receiver element are greater than said first.
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Specification