Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1989-07-10
1990-11-27
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
15250C, 250339, 250349, G01N 2141
Patent
active
049738445
ABSTRACT:
A moisture sensing assembly, adapted for mounting on the inner surface of a vehicle window or windshield to control vehicle accessories such as windshield wipers, maximizes the window are a being sensed while minimizing the size of the overall assembly. In the preferred embodiment, moisture on the outer window surface is detected by stacked rows of infrared energy receiving sensors spaced in angular relationship from stacked rows of infrared energy emitting diodes. The emitter diodes and sensors are preferably carried in separate emitter and detector mounting blocks slidably fitted in a rigid carrier. The sensor row closest to the window receives energy from the diode emitter row farthest from the window and vice versa. Energy barrier walls are provided in the diode and sensor support for blocking energy reflected by the inside window surface. The assembly is adapted for use with an electrical circuit which operates one emitter diode row and its corresponding sensor row while the other emitter and sensor rows are deactivated to prevent interference and false reflected signals from the other emitter row. Removable attachment to the window with a circular member provides ease of installation and improved positioning and orientation of the sensing assembly.
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U.S. patent application Ser. No. 07/298,419, by Hochstein, filed Jan. 18, 1989, entitled "Rain Sensor with Reference Channel".
Co-pending U.S. patent application Ser. No. 07/183,706, filed Apr. 19, 1988, entitled "Vehicular Moisture Sensor and Mounting Apparatus Therefor", assigned to the same assignee as the present invention. The apparatus of this application was provided in three prototype samples for technical evaluation and testing in an automotive environment and not for purposes of sale to one other company more than one year prior to Jul. 10, 1989.
Co-Pending U.S. patent application Ser. No. 07/183,693, filed Apr. 19, 1988, entitled "Windshield Moisture Sensing Control Circuit", assigned to the same assignee as the present invention.
Co-Pending U.S. patent application Ser. No. 07/317,288, filed Feb. 28, 1989, entitled "Continuously Adaptive Moisture Sensing System for Wiper Control", assigned to the same assignee as the present invention.
Co-Pending U.S. patent application filed Jul. 10, 1989, entitled "Control for a Moisture Sensor", assigned to the same assignee as the present invention.
Quantex Engineering, Warren, Mich.--"Bench Test With Solar World Cells for Compensated Rain Sensor" (two pages).
"E. O. Rain Sensor--Compensation Methods" (one page).
Siemen Opto-Electronic Data Book--1986, pp. 532-534 and 538 (LD271-Application Notes) (four pages).
O'Farrell Desmond J.
Schierbeek Kenneth L.
Donnelly Corporation
Hannaher Constantine
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