It is very finite that the driver is located in the perspective inside driver's seat, through the driver's ken can rising substantially with outboard viewfinder inside the car, but be located in a car rear fraise, and the eye shot blind angle that perhaps can't be apart from automobile body to cross close fraise to be in a driver possibly through what viewfinder sees highly or view is dim in the area. Such, small berth car to the driver, back a car feel disadvantageous, also can bring a few risk greatly.
Eye shot blind angle of the driver
And back a car radar can be in in the blind angle of these eye shot, offer information and caution for the driver through the form such as sound, data, image, make a driver right all round the circumstance of fraise can clearer understanding, car of the getaway to the driver, berth, back a car wait for link to have very great help, enhance driving security.
What we see normally is rear back a car radar is to use ultrasonic sensor to come true commonly, this kind backs a car radar is general by sensor, controller, feedback implement 3 parts composition.
When the car is in reverse gear condition, back a car radar begins the work, transmit ultrasonic signal by sensor, once the car is rear occurrence fraise, ultrasonic is reflexed by fraise, sensor can receive reflection wave signal, what undertake to reflexing wave signal through controller processing will judge fraise is located the position and the distance with automobile body, finally by feedback implement through sound (buzzer) , data (the distance shows) , image (indication screen imitate) wait for means to give a driver information feedback.
Back a car radar sketch map
Back a car radar develops
Speak of to back a car radar, the everywhere before everybody writes down for years certainly can hear that ringing female voice: “ asks an attention! Back a car! ” , this can count back a car the originator of radar, although watch the clew news of type of this kind of mike from working principle,the operation to the driver won't have any helps, can have some of caution effect to the pedestrian only, but it is right back a car of radar technology introduce erected a surveyor's pole.
After this, afore-mentioned ultrasonic sensor of type back a car the configuration of a standard that radar became a car to go up. Most begin back a car radar, use buzzer to regard feedback as the means of information more, as the emergency of clew sound, the driver can judge a photograph the far and near to fraise, because cost is relative cheap, this kind backs a car radar still is applied extensively up to now.