The invention discloses a motor vehicle track control method and a motor vehicle navigation coordinate
system establishment method. Two reference points are selected at random, and the distance between the two points is calculated; any one point is taken as the original point, and the connecting line of the two points is taken as the X axis to establish an XY axis coordinate
system; based on the established coordinate
system,
laser navigation equipment of a motor vehicle emits a linear
laser by the angle theta, and the motor vehicle linearly backs up along the
deflection angle of a vehicle body; and when the liner
laser scans the reference point which is not the original point, a
steering wheel is turned to the
fixed position to change the travelling track. The motor vehicle track control method and the motor vehicle navigation coordinate system establishment method can be used in any garage,
parking lot and open space, and the using range is wide; interference from the surrounding environment is small, and parking can be achieved at any angle and position; the accurate and safe effects are achieved, mounting and dismounting are convenient, suitable clamp tools can be selected according to vehicle types and are directly clamped on rearview mirrors, a power source is carried, and the vehicle
route does not need to be changed; and the shape is attractive, extra wind resistance is not generated, a protective shell and the outer rearview mirrors are integrated into a whole, and the outer rearview mirrors can be laid flat or retracted into the protective shell.