DE2331328
Motion within a large specified volume is detected by multiple ultrasonic transducer assemblies with a redundant microwave antenna to reduce false alarms. Each of the ultrasonic transducer assemblies contains a plurality of highly directive transmitting radiating elements and/or a plurality of highl...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | English |
Published |
23.06.1988
|
Edition | 4 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Be the first to leave a comment!