Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Patent
1988-03-31
1990-07-17
Williams, Hezron E.
Communications, electrical: acoustic wave systems and devices
Echo systems
Speed determination
367 90, 367902, 342115, G01S 1558
Patent
active
049425587
ABSTRACT:
An ultrasonic ground speed sensor has a single transducer which both transmits and receives ultrasonic signals. The sensor is mounted on a vehicle in alignment with the direction of the vehicle, the transducer having a built-in angle with the body of the sensor unit. The transmitted signal is clocked by a 16 MHz clock, with the signal received by the transducer selectively filtered and amplified. A temperature sensor is also used to determine the speed of the transmitted and received signal. A 64-cycle sample period is used, as well as multiple counters and a signal processor to increase accuracy and minimize erroneous readings. A drop-out detector and monitoring system sensor is also described. The vehicle speed is calculated from a Doppler-based formula as a function of both the sum and difference of the transmitted and received signal frequencies. Also disclosed is a gasket seal having leak holes for drainage from the interior of the sensor.
REFERENCES:
patent: 3028578 (1962-04-01), Stanton
patent: 3912121 (1975-10-01), Steffen
patent: 3928751 (1975-12-01), Fathauer
patent: 4225930 (1980-09-01), Steffen
patent: 4225950 (1980-09-01), Kotera et al.
patent: 4262288 (1981-04-01), Lanphier, III
patent: 4268825 (1981-05-01), Kaplan
patent: 4277833 (1981-07-01), Steffen
patent: 4489321 (1984-12-01), Hoffa et al.
patent: 4524349 (1985-06-01), Hyatt
patent: 4713665 (1987-12-01), Phelan
patent: 4728954 (1988-03-01), Phelan
patent: 4751498 (1988-06-01), Shalvi et al.
Carlson, Bruce A. et al., "Electrical Engineering Concepts and Applications" 1981, p. 499.
Hiniker Thomas K.
Tofte Semor D.
Micro-Trak Systems, Inc.
Spector Mark A.
Williams Hezron E.
LandOfFree
Ultrasonic velocity sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic velocity sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic velocity sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-99120