This system can have the following functions:
(1) When reversing, the distance between the vehicle and rear obstacles can be displayed;
(2) The alarm distance can be set freely;
(3) When the distance between the vehicle and the obstacle is less than or equal to the set distance, an audible and visual alarm can be issued;
(4) The calculation of sound speed can be automatically corrected according to the difference in ambient temperature.
(1) Measuring distance: 20 cm ~ 450 cm;
(2)Display accuracy: 1 cm
(3) Measurement accuracy: less than 1%;
(4)Power supply: 5 V DC
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