The invention discloses a high-precision detection device and method for a large well chamber, and relates to the field of
geotechnical engineering detection and test.The detection device comprises a host, a well mouth tripod, a depth
step counting wheel, a motor and a spherical
machine, and an optical range finder, a
sonar probe, a camera and a depth sensor are integrated in the spherical
machine; the host controls the motor to drive the depth
pedometer wheel to control the lifting of the spherical
machine, and the detection mode can be automatically switched; the invention further comprises a detection method based on the device. The method comprises the steps of controlling the spherical machine to ascend and descend, switching detection
modes, collecting space information, conducting fusion
processing to generate a three-dimensional digital model of the well chamber and the like. According to the invention, digital acquisition and three-dimensional
model reconstruction of the spatial contour and the internal structure attribute of the large well chamber are realized, the detection
modes can be automatically switched according to the well chamber environment, and the detection precision and efficiency are improved.