3 results about "Laser doppler velocimeter" patented technology

The utility model discloses a kind of dynamic steel billet laser doppler measuring devices of follow-up, including conveying roller, the inner wall left side of conveying roller is equipped with measuring hole, the left side of conveying roller is fixedly installed with linear displacement rod, the upper movable mounting of linear displacement rod has moving platform, the upper fixed mounting of moving platform has laser doppler velocimeter sensor, first position sensor and second position sensor, the left side of linear displacement rod is fixedly installed with servo motor, the output end fixed mounting of servo motor has adjusting screw rod.The utility model actively adapts to the position change of steel billet, reduces the requirement to the running stability of steel billet, expands the applicable scenario of laser doppler velocimeter sensor, to realize the length measurement of continuous, stable, high-precision to the steel billet that exists swing or bending;It provides accurate length and positioning information for automatic sawing and subsequent process, help to improve product size qualification rate and yield rate.

The present application relates to a kind of continuous elevation measurement method and system based on SINS / LDV combination, belong to geodetic survey field.The system includes strapdown inertial navigation system, laser doppler velocimeter, UPS power supply and navigation computer, wherein, the angular motion and linear motion of sensitive carrier are used to strapdown inertial navigation system;Strapdown inertial navigation system is connected with laser doppler velocimeter and navigation computer respectively;Laser doppler velocimeter is connected with navigation computer, and UPS power supply is connected with strapdown inertial navigation system and laser doppler velocimeter respectively;In order to improve the precision of elevation measurement, the output of laser doppler velocimeter is triggered with the pulse output of strapdown inertial navigation system as benchmark, to prevent the data loss phenomenon caused by the inconsistency of internal crystal oscillator of strapdown inertial navigation system and laser doppler velocimeter.

FIELD: production of linear products.SUBSTANCE: production of linear products by drawing, rolling, extrusion, twisting, layering, methods and devices for contactless monitoring of surface defects. Claimed device comprises a horseshoe-shaped housing mounted on a telescopic stand with the ability to be folded out of the working area by means of a hinge with light sources, video cameras and a laser Doppler velocimeter installed in it, a switch, a computer, a switch for connecting to a corporate network, a light and sound signaling unit, a connection unit with a process line, a connection unit with peripheral devices in the form of a printer and a marking machine, a mouse, a keyboard, a touch screen and software for collecting, processing and displaying information.EFFECT: increase in the accuracy of defect detection, determination of the geometric dimensions of the body, monitoring of the surface of the working body from all sides in a plane perpendicular to the direction of movement of the working body, creation of the possibility of introducing and removing the control and measuring system from the measurement zone without stopping the technological process and determining the coordinates of the detected defect along the length of the inspected working body.16 cl, 6 dwg