Single-cable acquisition method, single-cable structure and system for acquiring vibrating wire stress data

Abstract

The invention discloses a single-cable acquisition method for acquiring vibrating wire stress data, and also relates to a device and a system. The method includes the following steps: a plurality of controllable switching devices which can be triggered by external signals to close and open are sequentially packaged in a cable body along the length direction of the cable body, the lead of one end of each controllable switching device serves as a connecting wire which is connected with an external vibrating wire sensor, the lead of the other end serves as a controllable switching device control and sensor signal acquisition wire which is connected with an assorted vibrating wire sensor reading instrument, the vibrating wire sensor reading instrument centrally sends the data back to a remote monitoring terminal by way of wired or wireless communication after the data of all the sensors are acquired, and thereby integrated distributed measurement is fulfilled. The invention realizes rapid multi-channel stress data acquisition by only one special cable, moreover, the invention is more notably superior to the conventional artificial reading method, and not only can rapidly and accurately read the data of the sensors at any time, but also can directly send the data back to the remote terminal via the GPRS (General Packet Radio Service) network, and thereby a user can carry out data acquisition and know the state of a structure without going out.

Description

technical field [0001] The invention relates to the technical field of structure measurement, in particular to a method for measuring structural strain by using a vibrating wire sensor, and also relates to an acquisition device and an acquisition system. Background technique [0002] The vibrating wire sensor is a non-electrical measurement sensor that is widely valued and widely used at home and abroad. The vibrating wire sensor has the advantages of simple structure, strong and durable, strong anti-interference ability, reliable measurement value, high precision and resolution, and good stability, so it is widely used in bridges, tunnels, buildings, railways, transportation, hydropower, dams Construction monitoring and long-term safety monitoring of structures in engineering fields. [0003] Usually a considerable number of vibrating wire sensors are deployed on a monitoring structure to analyze the overall state of the structure according to the stress of each section. ...

AI Technical Summary

Problems solved by technology

The traditional measurement method is to use a hand-held collector to read the data of each sensor sequentially on site, which takes a lot of manpower and takes a long time for a measurement cycle. In addition, due to the complexity of the site environment, the measurement often requires Climbing scaffolding, etc., therefore also brings certain dangers to the surveyors; and the existing multi-channel collectors in the market, although they can collect multiple sensors, often can only measure 4-12 sensors, if you need to measure more , you need to purchase additional expansion modules, and expansion modules are often expensive

In addition, each sensor requires a separate cable to connect to the collector. As the number and distance of sensors increase, many cables are required, so it costs a lot of money

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