Contact debris flow motion parameter monitoring device and system as well as debris flow early-warning method

Abstract

The invention discloses a contact debris flow motion parameter monitoring device which comprises a columnar monitoring pile, wherein the lower area of the columnar monitoring pile is fixed in a bed of a debris flow gully, and parameter monitoring sensors are arranged in the upper area of the columnar monitoring pile, and comprise an acceleration sensor, an ultrasonic sludge level sensor and an impact force sensor; the ultrasonic sludge level sensor is arranged above the impact force sensor. The invention further provides a contact debris flow motion parameter monitoring system implemented by the monitoring device. An upper control center of the system communicates with a signal transmission device of the monitoring device through a wireless signal, and the contact debris flow motion parameter monitoring device can be arranged in the debris flow gully in a second-stage or third-stage manner. The invention further provides a debris flow multi-stage early-warning method implemented by the monitoring system. By the device and the system, key power parameters during the real-time monitoring of a debris flow motion process can be comprehensively acquired. According to the method, early-warning accuracy can be improved.

Description

technical field [0001] The invention relates to a debris flow monitoring device, system and debris flow early warning method, in particular to a contact type debris flow movement parameter monitoring device, system and debris flow early warning method, belonging to the fields of disaster monitoring and debris flow prevention and control engineering. Background technique [0002] Debris flow is a typical solid-liquid two-phase medium with super flow characteristics and huge destructive ability. It destroys various structures along the way or in the accumulation area through burial and direct impact. It is a typical geological phenomenon in mountainous areas. type of disaster. Debris flow disaster reduction measures can be mainly divided into two categories: engineering measures and monitoring and early warning / forecasting. Monitoring and early warning / forecasting is the most effective measure for debris flow disaster reduction at the present stage because it can effectively r...

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Problems solved by technology

In the first type of technology, since rainfall is a necessary but not sufficient condition for the formation of debris flow, the critical rainfall threshold of debris flow is less considered to be affected by various factors, so the false alarm rate and false negative rate are extremely high; the second type of technology Among them, because the water content and pore water pressure at different locations in the debris flow basin may be different, the technical means to determine the critical early warning threshold of the debris flow water content or pore water pressure are complex, so it is difficult to apply to engineering practice; in the third category of technology, Since the debris flow occurs during the rainstorm or at night, the debris flow cannot be observed from the video at all, so the practicability of the early warning / forecast method is low; in the fourth type of technology, it is easy to combine the vibration (secondary) signal generated by the debris flow with the outside world The vibration (secondary) signal generated by interference is confused and leads to false alarms, so large-scale promotion and application are relatively limited

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