Laser evenness measuring system and method based on acceleration compensation

The invention provides a laser evenness measuring system and a method based on acceleration compensation. The method of the invention comprises the following steps: at regular time interval, measuring the vertical distance between a specific point on a road vertical section and a car body; at the moment of measuring the distance, synchronously measuring the acceleration of the car body in the vertical direction; according to the progression of the recorded vertical direction, fitting the distance progression of the road vertical section and the car body with the least square method; carrying out quadratic integral to the recorded acceleration value progression to obtain a car body bumping value; according to the bumping value, fitting the bumping progression of the car body in the vertical direction with the least square method; subtracting the car body and road surface distance progression from the vertical bumping progression of the car body to obtain a road surface undulate progression; re-sampling the road surface undulate progression at the interval of 25 cm; and calculating to obtain the road surface evenness value according to 1/4 vehicle model. The invention can realize the evenness measurement with wide variable speed, high precision and high reliability.