TY  - JOUR
PY  - 1995//
TI  - Optical spatial filter sensor for ground speed
JO  - Optical review
A1  - Sakai, Yasunobu
A1  - Uno, Tetsuya
A1  - Takagi, Junichi
A1  - Yamashita, Tsukasa
SP  - 65
EP  - 67
VL  - 2
IS  - 1
N2  - The prototype for a ground speed sensor has been designed, fabricated and evaluated. It works on the principle of optical spatial filtering and uses pulse driven light emitting diodes as a source of illumination. The sensor was tested at speeds ranging from 2 to 50 km/h, and an accuracy of 1.5 km/h was obtained with response time of 30 ms, height from ground of from 230 to 370 mm and on various road surfaces. The sensor is viewed as beneficial for use in a vehicle's antilock braking system and will contribute to traffic safety.<p /> 
LA  - 
SN  - 1340-6000
UR  - http://dx.doi.org/10.1007/s10043-995-0065-3
ID  - ref1
ER  -