Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection
Patent
1996-12-31
1999-06-29
Swann, Glen
Communications, electrical: acoustic wave systems and devices
Echo systems
Presence or movement only detection
340568, 367135, 367137, 367191, G01S 1504
Patent
active
059177764
ABSTRACT:
A rugged ultrasonic sensor is provided which is capable of detecting objects in very close proximity to the sensor. This close proximity detection includes the detection of objects which are immediately adjacent the sensor housing. Such close range operation is achieved by tailoring the transducer to operate at previously undesirable conditions, including low Q and high frequency. Such operating conditions allow the resonating characteristics of the transducer not to interfere with close range operation.
REFERENCES:
patent: 3821834 (1974-07-01), McElroy
patent: 4596006 (1986-06-01), Eder
patent: 5267219 (1993-11-01), Woodward
Object Detection Techniques Range from Limit Switches to Lasers, Control Engineering Nov. 1980, pp. 65-70.
Design and Characterization of a PVDF Ultrasonic Range Sensor, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 39, No. 6, Nov. 1992, pp. 688-692.
Texas Instruments data sheets, Linear Integrated Circuits, Sonar Ranging Receiver Type TL852, Nov. 1983.
Texas Instruments data sheets, Linear Integrated Circuits, Sonar Ranging Control Type TL851, Sep. 1983.
Texas Instruments data sheets, Linear Integrated Circuits, Sonar Ranging Control TL853, Dec. 1984.
Electronic Design & Packaging Company data sheets, SonaSwitch.TM. 1400, 1991.
Blatek, Inc. data sheets, 8000 Series, Model 8030-220 Air Coupled Transducer.
Projects Unlimited data sheets, Air Ultrasonic Ceramic Transducers, 1985.
Motorola data sheets, 45 Khz Transducer, 1988.
Reduced costs help ultrasonic sensors compete in position-detection systems, Technology Update EDN, Nov. 28, 1985.
Honeywell Inc.
MacKinnon Ian D.
Swann Glen
LandOfFree
Means for reducing minimum sensing distance of an ultrasonic pro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Means for reducing minimum sensing distance of an ultrasonic pro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Means for reducing minimum sensing distance of an ultrasonic pro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1382072