Method and device for scanning inner contour of buildings by using handheld rangefinder

The invention discloses a method and a device for scanning an inner contour of buildings by using a handheld rangefinder. The device comprises a PC which serves as a command control center and a data converting center and a distance measuring device which is used for scanning, surveying and mapping. The distance measuring device comprises a rotatable rotating cradle head and a rangefinder installed on the rotating cradle head, wherein the rotating cradle head is further equipped with a power supply device, a power unit, a controller, and a reduction gear set. The rotating cradle head carries the rangefinder and rotates synchronously step-by-step towards angles such as limiting positions and the like intermittently, the rangefinder emits beams to measure the distance between an object being tested and the rotating cradle head at every pause point of the rotating cradle head until the rotating cradle head rotates to the limiting positions, the controller sends measured distance data and a stepping angle to the