Parallax based distance measuring device

摘要

A distance measuring device includes a first camera and a second camera arranged side by side. The first camera includes a shell, a shaft, a camera module rotatably held in the shell via the shaft, a driver configured for driving the camera module to rotate, and a measuring device configured for measuring an angle that the camera module rotates. The camera module includes an optical axis substantially perpendicular to and intersecting with the shaft.

主权项

1. A distance measuring device, comprising:
a first camera and a second camera arranged side by side, the first camera comprising: a shell; a shaft; a camera module rotatably held in the shell via the shaft, the camera module comprising an optical axis substantially perpendicular to and intersecting with the shaft; a driver connected to the camera module and configured for driving the camera module to rotate around the shaft; a measuring device configured for measuring an angle that the camera module rotates around the shaft; and a mode recognition device and a calculation device, the mode recognition device being configured for recognizing and locating a first image formed by the second camera and a second image formed by the camera module of an object present in both fields of view of the second camera and the camera module, the mode recognition device also being configured for measuring a first distance xl between the first image and a center of an image sensor of the second camera and a second distance xr between the second image and a center of an image sensor of the camera module, the calculation device being configured for calculating a distance da of the object by a formula: da=bf/(xl−xr), wherein b is a distance between the centers of the image sensors of the second camera and the camera module, and f is a focal length of the camera module and the second camera.