3D paving system and method for detecting self-adaptive virtual paving thickness based on matrix ultrasonic waves

The invention discloses a 3D paving system for detecting a self-adaptive virtual paving thickness based on matrix ultrasonic waves, comprising: a paving machine comprising a screed plate and balance beams mounted on two sides of the screed plate; detection equipment which comprises at least six ultrasonic detectors which are respectively arranged at the front end, the middle end and the rear end of the paving machine; positioning equipment which is used for synchronizing the incidence relation between the detection value of each ultrasonic detector and the plane position of the detector, and comprises a GPS positioning device; and a control terminal which obtains the design surface elevation of the corresponding position and the construction result surface elevation of the previous structural layer through synchronous matching of the current position information of each detector, realizes self-adaptive dynamic change to calculate virtual paving control parameters, and sends an instruction to drive the paving