Device and method for measuring mud depth of debris flow

Abstract

The invention discloses a device and a method for measuring mud depth of debris flow. Aiming at various technical defects caused by the fact that wireless measurement sensors used for measuring the mud depth of debris flow are mounted right above debris flow channels in the prior art, a device of using the wireless measurement sensors to measure the mud depth of debris flow is provided. The device is characterized in that the wireless measurement sensors are mounted on side banks of the debris flow channels to simultaneously send a plurality of different measuring lines from emission points, and inclination angles of the measuring lines are optimized on the basis of topographic features of the channels. The invention further provides a method of using the device to realize measurement of the mud depth of debris flow. The method includes that data are acquired through the measuring device to determine a mud depth value by means of calculus of interpolation and trigonometric calculation. A structure which is most prone to damage and seriously affects measurement precision in an existing measuring device is omitted, so that cost of a measuring system is saved. Further, by means of matching of calculation methods, measurement precision is improved, and the device and the method for measuring the mud depth of debris flow are especially applicable to requirements of the engineering field.

Description

technical field [0001] The invention relates to a mud level measuring device and method, in particular to a mud-rock flow multi-point mud level measuring device and method, belonging to the field of water conservancy engineering measurement and testing. Background technique [0002] The mud level (also called mud depth) of a debris flow refers to the distance from a certain point on the mud surface to its corresponding vertical projection point on the bed when the debris flow is in motion. Mud level is a very critical parameter of debris flow, which can be used to calculate the velocity and scale of debris flow, etc. By monitoring the continuous dynamic change index of mud level, the occurrence and movement changes of mud-rock flow can also be analyzed. Accurate mud level values ​​are required in engineering design, motion calculation, monitoring and early warning of debris flow. There are usually three methods for mud level measurement in debris flows, namely mud mark obs...

AI Technical Summary

Problems solved by technology

[0004] There are at least three deficiencies in the existing measurement systems and methods in practical applications: 1. Since the wireless measurement sensor needs to be installed directly above the debris flow ditch, it is necessary to erect supports and connect beams / cables on both sides of the ditch at the same time, or Erection of supports and long cantilevers on one side of the channel

Such a cantilever or beam / cable is greatly affected by the wind and is easy to shake, causing the sensor to sway, which seriously affects the measurement accuracy of the mud level; 2. The height of the mudslide faucet is often 4-5m, and the stones and mud are upward when moving the splash

In order to avoid being hit by debris flow, when the sensor is installed directly above the trench, the cantilever or beam / cable must be erected to a very high position, which greatly increases the design and installation costs; Cables are easily damaged and damaged by environmental conditions, resulting in high maintenance costs for the measurement system

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