BAIJIAN - Third party testing organization
The deflection monitoring of the grid is carried out in the application、 maintenance、 and overhaul warehouses. If the traditional hanging steel ruler leveling method is used for monitoring、 it must be directly in contact with the grid. This requires power outage、 grounding、 and high-altitude operations with the help of lifting platforms for each observation、 which will bring great inconvenience to the monitoring work、 and even many times the work cannot be carried out. Through careful analysis and research、 the originally planned hanging steel ruler leveling method has been improved to the total station trigonometric elevation observation method for monitoring
The general steps for monitoring the deflection of the grid: first、 use a level to measure the elevation of two measuring points on the ground、 use a total station triangulation to measure the elevation、 calculate the elevation of the grid monitoring points、 and calculate the deflection of the grid through the corresponding formula.???? The specific implementation is as follows: first、 a total station is installed at a fixed measuring point 20 to 25 meters away from the monitoring point in the direction of the vertical grid beam. At the same time、 prisms are placed on two measuring points on the ground and aligned (used to observe the horizontal distance between the measuring station and the ground measuring point)、 and small standard components are inserted on the ground monitoring point to reduce alignment errors. Then、 use the directional observation method to measure 2 vertical right angles and 2 horizontal distances each (with 2 horizontal distance measurements per measurement). Based on the observation data、 use the trigonometric elevation method to calculate the height difference from the center of the prism to the ground monitoring point directly below the prism、 and then use the elevation of the ground monitoring point to calculate the center elevation of the network monitoring point
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