Galvanometer and laser radar
A light source and reflector technology, applied in the field of laser radar, can solve the problem of low stability of slow axis control, and achieve the effect of improving stability and flexible scanning speed
Pending Publication Date: 2021-03-05
LEISHEN INTELLIGENT SYST CO LTD
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Problems solved by technology
However, the above electromagnetic drive method is easily affected by the vibration or external force generated by the solid-state lidar, resulting in low stability of the slow axis control
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[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.
[0032] The galvanometer (also referred to as “scanning galvanometer”) provided in the embodiment of the present invention is mainly used in solid-state or hybrid solid-state laser radars. The laser beam projected to the mirror is reflected to the vertical field of view; by controlling the mirror in the scanning mirror to rotate around the slow axis, the laser beam projected to the mirror can be reflected to the horizontal field of view. Under the action of joint rotation, scanning and detection of a certain field of view angle can...
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The invention discloses a galvanometer and a laser radar. The galvanometer comprises a fixed base, a reflecting mirror, a galvanometer driving frame and a slow-shaft driving assembly; the galvanometerdriving frame comprises a fast-shaft support and a slow-shaft support; the reflecting mirror is mounted in the fast-shaft support, the fast-shaft support is connected into the slow-shaft support, andthe galvanometer driving frame is rotationally connected into the fixed base, wherein the fast-shaft support twists around a first direction, the slow-shaft support twists around a second direction,and the first direction and the second direction are crossed; the slow-shaft driving assembly comprises a motor, a cam and a transmission rod; one end of the transmission rod is connected with the slow-shaft support, the other end of the transmission rod is slidably connected to the edge of the cam, and the motor is used for driving the cam to rotate so that the transmission rod can move along theedge curve of the cam to drive the slow-shaft support to twist in the second direction, wherein the edge curve is a closed curve formed by connecting curve line segments with at least two curvatures.According to the embodiment of the invention, the stability of galvanometer slow shaft control can be improved.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of laser radar, and in particular, to a galvanometer and a laser radar. Background technique [0002] The galvanometer is an optical scanning element in a solid-state lidar. It usually has two rotation axes, the fast axis and the slow axis, respectively. The fast axis and the slow axis are perpendicular to each other. The slow axis is usually used for scanning in the horizontal direction, and the fast axis is usually used for scanning in the vertical direction, thereby realizing two-dimensional scanning. [0003] At present, solid-state lidars mostly use electromagnetic drive to drive the galvanometer to rotate around the slow axis. The coil is energized and the permanent magnet generates torque and acts on the slow axis. The slow axis is rotated by force, so that the galvanometer rotates around the slow axis, thereby realizing the Scan in the horizontal direction. However, the ab...
Claims
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Login to View More IPC IPC(8): G01S7/481G01S17/02
CPCG01S7/4817G01S17/02Y02A90/10
Inventor 胡小波刘立福
Owner LEISHEN INTELLIGENT SYST CO LTD