Bridge wireless detecting system based on sensor

Abstract

A radio detection system of bridge based on transducer is prepared as connecting computer data input to central data processing module I / O, connecting module communication bus to main channel data bus, connecting main channel antenna in radio mode to antenna of each branch channel, connecting branch channel data bus to communication data bus of data collecting point, connecting data collection end of each collecting point to output of a transducer.

Description

Technical field: [0001] The invention relates to the technical field of bridge detection, in particular to a bridge wireless detection system based on existing sensors. Background technique: [0002] Since the 1980s, with the strengthening of my country's economic strength and the improvement of scientific and technological level, the rapid development of bridge engineering technology has been promoted. The shape of the bridge structure is becoming more and more slender and beautiful, the span of the bridge is increasing, and the number of bridges with extra long spans is increasing year by year. As an important part of national infrastructure, bridges play an increasingly important role in national economy and social life. People are very concerned about the safety, durability and normal service function of large bridges. Bridge detection technology is an important part of the bridge engineering field, and the transmission of existing bridge detection data is completed by...

AI Technical Summary

Problems solved by technology

Although this technical method has the advantages of low technical content, high data transmission efficiency, and good accuracy, in the test of long-span bridge structures, with the increase of bridge span and the increase of the number of sensors, the amount of wired cables increases sharply, and thousands of meters of wired cabling workload becomes difficult to implement

For long-span bridges, there are many inconveniences in bridge detection using the existing long-distance wired cable connection method

For example, the on-site test cycle is long, inefficient, and poor in flexibility; the workload of arranging and evacuating wired cables is heavy; if there are many test points, the distribution of wired cables is complicated and messy, and it is easy to make mistakes, which will bring irreparable difficulties for later data processing; Due to the long period of the bridge inspection work, the test site must be guarded at night to prevent the cable from being damaged, stolen, etc.

Therefore, it is reasonable to believe that the existing bridge detection technology is obviously behind the construction level of bridge engineering

To a certain extent, this restricts the improvement of bridge engineering technology, making it difficult for some new structures, new technologies, new materials and new design ideas to be verified by field tests

There are also domestic and foreign literatures that use wireless transmission to realize data communication products. At present, the existing domestic wireless devices are based on wireless acceleration sensors, which means that each measurement point needs to place a wireless acceleration sensor, which will inevitably increase the cost; In the data transmission, the signal interference between the sensors is serious, resulting in a high data loss rate; the transmission medium needs to rely on the existing communication network, and the data transmission cannot be realized in the areas where the network cannot cover, and the structural testing work cannot be realized. ;The wireless acceleration sensor can only be used for the dynamic test of the structure, and cannot be used for the static test of the structure; the effective transmission distance of the wireless acceleration sensor is less than 300 meters, which is far from meeting the test requirements of the general 1-3 km long-span bridge; The electronic components of the acceleration sensor are all Hong Kong and foreign devices, and the price is relatively expensive

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