Vehicular moisture sensor and mounting apparatus therefor
Patent 4973844 Issued on November 27, 1990. Estimated Expiration Date: July 10, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
250/341.7, With multiple sources15/250.001, Optical-member-attachable cleaner (e.g., windshield wiper)15/339, Combined, e.g., with signal or indicator250/341.8Measuring infrared radiation reflected from sample
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.
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