Laser displacement sensor

The invention discloses a laser displacement sensor. The laser displacement sensor comprises a shell, and a laser emitting device, a laser receiving device, a reflecting device, an image sensing module and a control module which are arranged in the shell; the laser emitting device is used for emitting laser to a measured object; the laser receiving device is used for focusing the laser reflected by the measured object and emitting the laser in a straight line; the reflecting device is used for receiving the laser emitted by the laser receiving device and reflecting the laser to the image sensing module; the image sensing module is used for sensing the laser reflected by the reflecting device and converting the laser into an electric signal; the control module is used for calculating the actual distance of the measured object according to the electric signal, comparing the actual distance with a preset threshold value, and adjusting the intensity of the laser emitted by the laser emitting device and the exposu