Abstract: An electronic ruler for pets includes a displacement sensor module; a controller; a display; a first wireless communication module; and a control key. The displacement sensor module includes a tape or reel; the tape or reel is configured to convert a physical length of a pet to be measured into a displacement length through a rotation angle of the tape or reel, and the displacement length is further converted into an electrical signal; the controller is configured to calculate and convert the electrical signal into a length value in a set unit, and display the length value on the display; and the first wireless communication module is configured to transmit the length value to an upper computer, and the control key is configured to set the parameters of the length value and confirm the transmission of the length value to the to the upper computer.

Abstract: A lidar system based on visible-near infrared-shortwave infrared light bands comprises a light source sub-system, a light receiving sub-system and a signal collecting and processing sub-system, and adopts a laser light source having a supercontinuum spectrum laser comprising the three bands of visible, near infrared and shortwave infrared light. The lidar system conveniently and effectively achieves hyperspectral measurement of three bands of visible, near-infrared, and shortwave infrared lights without needing to replace the laser light source, increasing the capability of detecting target spectrum information and application range, providing more accurate measurement results and post-processing algorithms, and strengthening the capability of simultaneously detecting visible-near infrared-shortwave infrared ligh bands of a lidar system.