Micro motion sensor
US5903217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Oct 21, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2400/822
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microwave motion sensor for detecting multiple levels of motion of a target is disclosed. The motion sensor includes a transceiver for broadcasting a signal into a predetermined area and receiving a reflected signal with a receiver for producing first and second directional signals. A signal conditioning circuit is provided for amplifying the first and second directional signals and digitizing the directional signals. The signal conditioning circuit includes a micro motion amplifier for separately amplifying one of the directional signals and producing a micro motion signal. A processor is provided for receiving the first and second directional signals transmitted by the signal conditioning circuit, and for receiving the micro motion signal. The processor includes a circuit for analyzing the directional signals, and a circuit for comparing the micro motion signal to a threshold. The processor is capable of adaptively switching between a first mode for detecting a threshold level of motion, a second mode for detecting a level of motion which is less than the threshold level of motion, and a third mode for detecting a level of motion which is greater than the threshold level of mot…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.