Advanced RISC Machines (ARM)-based car ranging and anti-collision warning device

The utility model discloses an ARM-based car ranging and anti-collision warning device, and comprises a laser ranging module, a speed gathering module, a signal processing and controlling module, a liquid crystal display (LCD) displaying module and a warning module. A laser ranging device is fixed in the middle of the front portion of the car body, the laser ranging module is connected with the speed gathering module which is connected with the signal processing and controlling module, and the signal processing and controlling module is connected with the warning module and the LCD displaying module respectively. The laser ranging device measures the distance between cars and transmits analog signals to ARM embedded system, one signal beam is transmitted to an LCD for direct display of an actual distance, so that a driver can see the correct distance display to make a judgment; and another signal beam collects and analyzes data from a vehicle speed sensor, compares the distance between the cars and a safety d