Laser three-dimensional shape testing device and method for acquiring object plane three-dimensional information thereof

The invention discloses a laser three-dimensional shape testing device and a method for acquiring object plane three-dimensional information of the laser three-dimensional shape testing device. The device comprises a laser distance measurement sensor, a two-dimensional scanning galvanometer and an analyzing and processing computer, the laser distance measurement sensor is composed of a laser light source, a distance measurement control circuit and a transmission circuit, the two-dimensional scanning galvanometer composed of a reflector, a driving circuit and servo motors is combined, and the function of automatically acquiring object plane shape information at high speed is achieved under the control of the computer. The laser distance measurement sensor and the two-dimensional scanning galvanometer are both connected to the computer, and the laser distance measurement sensor emits lasers under the action of the instructions of the computer, calculates a distance value through a receiving-sending time difference and transmits the distance value to the computer. The two-dimensional scanning galvanometer changes two paths of output voltages to drive the servo motors to deviate under the action of deviation instructions, the two paths of servo motors drive laser mirrors at the shaft ends of the servo motors respectively to deviate, therefore, the receiving-sending light paths of the lasers are changed, and object plane scanning is achieved. According to the technical scheme, the laser three-dimensional shape testing device and the method for acquiring the object plane three-dimensional information of the laser three-dimensional shape testing device have the advantages of being not in contact, high in data sampling rate, high in resolution and high in precision, and updating and upgrading of the system are convenient.