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100 results about "Sign posting" patented technology

Camera shooting measuring method for track geometric parameter

A method for measuring geometric parameters of a track by adopting a camera comprises the following steps: a measuring vehicle is placed on the track to be measured; a camera device is fixedly installed on one end inside the measuring vehicle; an optical axis of the camera device is in parallel with the plane of the bottom of the measuring vehicle; two sign posts are arranged on the track at the other end inside the measuring vehicle and are respectively perpendicular to the two sides of the plane of the bottom of the measuring vehicle; the two sign posts are at different heights and at the distance of r; a cooperation sign is arranged at the top end of each sign post; the sign posts can only move in the direction perpendicular to the plane of the bottom of the vehicle and in the transversal direction; a wheel at the bottom of the sing post moves, and is tightly attached to the inner side of a steel track; when the measuring vehicle moves on the track to be measured, the camera device is utilized to capture images of the cooperation signs at different time; and the images is processed through image processing and data processing on a real-time basis so as to acquire the geometric parameters of the track. The method meets the requirements of modern track construction and development, satisfies the requirements of high precision, high reliability and high automatic degree detection, and has good application prospect in the railroad engineering field.
Owner:张小虎 +3

Pressure relief valve

The invention discloses a pressure relief valve. The pressure relief valve comprises a valve seat and a valve shell with the two open ends. One open end of the valve shell is installed on the valve seat, a cover is arranged on the top of the part, inside the valve shell, of the valve seat, a sign post is fixed to the center of the cover, and the other end of the sign post is a free end and extends out of the other open end of the valve shell. A spring base is installed on the sign post in a sleeving mode, a pressure sensor is arranged at the top of the spring base and is used for emitting continuous digital signals and transmitting the digital signals to the background, and the pressure sensor and the spring base are prevented from moving axially along the sign post through a pressure regulation plate connected to the inner wall of the valve shell. Springs are installed at the part, between the spring base and the cover, of the sign post in a sleeving mode and are compressed. According to the pressure relief valve, the pressure sensor arranged at the tops of the springs can monitor the pressure values of the springs inside the pressure relief valve in real time, emit the continuous digital signals of the pressure values and transmit the digital signals to the background for monitoring, and therefore the reliability and the accuracy of the action of the pressure relief valve can be guaranteed.
Owner:CHINA XD ELECTRIC CO LTD
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