Speed radar
device · 1954 · Digital age
A device for measuring the speed of cars.
What it is made of
- Smartphone camera — has part. A camera captures the licence plate.
- Antenna — has part. An antenna.
- Digital signal processor — has part. Calculating the speed.
Principles and materials it uses
- Steel — is made of. The case is metal.
- Doppler effect — uses. Speed is measured from the Doppler shift.
What it is a kind of
- Doppler radar — is a kind of. A radar.