Want this question answered?
Motion detectors are: infrared detectors, ultrasonic, microwave, radiowave and... dogs.
The first motion detector was invented by Russian Leon Theremin in the year 1920, but the first motion detectors used as a security device were developed in early 1950's by Samuel Bagno. The basis of these first detectors was the Doppler effect and ultrasonic waves application.
technology that makes use of motion detectors
Motion detectors have had a massive impact on today's society. Motion detectors have made life easier for those who are very busy for example.
There are many levels of long range motion detectors, personal use and commercial use. Some motion detectors can detect movement up to 8-10 miles away. Some good brands for long range motion detectors are Honeywell and KNX.
Yes
The side effect of metal detectors is that it prevents the use of weapons and it also prevents violent crimes. The side effect of metal detectors is that it prevents the use of weapons and it also prevents violent crimes.
Birds
Some cctv security cameras also have motion detectors. If you are looking for a security camera with this feature, you should check the description before you buy it.
home security, motion detectors, have weapons near
Julian Kolodko has written: 'Motion vision' -- subject(s): Design and construction, Detectors, Measurement, Motion, Motion control devices
Sonic detectors pick up sound waves and motions When things move, they often create changes in surrounding Read more: How Does a Sonic Motion Detector Work? | eHow.com http://www.ehow.com/how-does_4564490_sonic-motion-detector-work.html#ixzz1R9OT0diL not all written by me