Filling continuous compaction acoustic wave detection system and method

Abstract

The invention discloses a filling continuous compaction acoustic wave detection system. Based on a rolling machine, detection equipment comprises a sound field pickup, an analyzing and processing module, a displayer, a GPS receiver and the like. When a filling layer is rolled, an acoustic wave field time domain signals generated near a rolling layer are received by the sound field pickup which isarranged on an eternal machine frame of a vibrating drum of a road roller and are sampled to form acoustic wave field digital signals; meanwhile, the GPS receiver provides spatial signals related to the rolled position, the sampled acoustic wave signals are filtered and spectrally analyzed to obtain secondary harmonic amplitudes of the effective acoustic signals, a continuous compaction degree index value is established according to the relevance between the secondary harmonic amplitudes and an earth-rock material compaction degree, and combined with GPS spatial position information, a time-space compaction degree distribution diagram of a rolled area is shown on the machine-mounted displayer. The filling continuous compaction acoustic wave detection system disclosed by the invention has the characteristics of non contact, continuity, real timeliness, suitable for filling engineering continuous compaction quality control and the like. A vibrating frequency and a vibrating amplitude ofthe vibrating drum of the road roller are controlled by compaction feedback, so that an intelligent continuous compaction function can be easily achieved.

Description

technical field [0001] The invention belongs to the technical field of earth-rock filling compaction quality detection, can be used for rapid and non-destructive detection of earth-rock filling quality, and particularly relates to an acoustic wave detection system and method for continuous compaction of earth-rock. Background technique [0002] With the construction of highways, railways, airports, buildings, bridges, reservoirs and dams around the world, more and more earthwork works are filled in the form of soil, asphalt mixture, earth-rock mixture, etc. materials or other materials, and the degree of compaction of filling materials is an important index to control the filling quality of earthwork engineering. It directly affects the strength and stability of the filling body, and affects the performance and service life of the filling body. Therefore, domestic Researchers at home and abroad have proposed and developed many testing equipment and technologies for the quali...

AI Technical Summary

Problems solved by technology

The present invention is based on the acoustic method for rapid non-destructive detection of the compaction degree of the soil and rock, through the sound signal acquisition device to realize the collection of the sound signal emitted by the soil and rock during the vibration compaction process of the roller compactor, and then using the airborne computer to collect the collected sound signal Spectrum analysis and processing of the effective acoustic signal to obtain the sound compaction index value, which has a strong correlation with the compaction degree of soil and rock, and can effectively characterize the compaction effect of soil and rock. The data is transmitted to the remote monitoring device in real time, which is convenient for data Online monitoring and analysis of access and data, so that it can effectively solve the problems of low precision, low efficiency, complex detection equipment or system structure, and high price in the quality inspection of existing earth-rock engineering filling, especially in the quality inspection of earth-rock dam filling , Non-full-area real-time measurement and other issues, to achieve rapid, non-destructive, accurate and efficient measurement of soil and rock compaction

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