Sensor Synchronized Controller for Bridge Monitoring

Abstract

The invention discloses a sensor synchronous controller for bridge monitoring. The sensor synchronous controller comprises a reference time establishing unit, a synchronous pulse generating unit, an external synchronous detection input unit and a synchronous code generating unit which are established based on an FPGA. According to the sensor synchronous controller for bridge monitoring, the time signal of a GPS is led into a measuring result, time identification codes are added for the output data of all sensors, precision synchronization of the data is achieved, and reference is provided for subsequent data processing and analysis. Meanwhile, the modes of internal synchronization and external synchronization are used, comprehensive and reasonable monitoring to a bridge is guaranteed, and the effects for saving data resources and reducing the pressure of wireless data transmission and data storage backups are achieved.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, and relates to a displacement and deformation measurement technology applicable to loads of bridges, dams, structural parts and the like, in particular to a synchronous controller for multiple sensors used in bridge monitoring. Background technique [0002] The deformation of bridges, dams, structural parts and other objects mainly includes static deformation and dynamic deformation. Static deformation refers to the deformation that changes slowly such as foundation subsidence, inclination and stress relaxation. Dynamic deformation refers to the deformation caused by wind, temperature, earthquake and traffic load. The short-term deformation caused by , its parameter monitoring plays an important role in the security assessment analysis of the target. Many countries in the world have invested a lot of manpower and material resources in the research of bridge deformation measurement ...

AI Technical Summary

Problems solved by technology

[0006] The application of this patent has the following problems: (1) There are many types of sensors, especially when wireless transmission is used, it is difficult to achieve accurate synchronization of various output data, resulting in the inability to make accurate and comprehensive judgments on the same emergency, which will give subsequent The processing, fusion and analysis of data bring difficulties; (2) the patent uses a fixed sampling rate to realize the signal acquisition of the sensor. Since the monitoring of the bridge load is a long-term work, and the number of sensors is large, it is hoped that there will be no emergencies When the bridge is in static deformation, low time resolution data sampling monitoring can be used to save data resources and reduce the pressure of wireless data transmission and data storage backup; and when an emergency occurs, that is, the bridge is in dynamic deformation , can collect and monitor bridges with high time resolution data to obtain more detailed information, so as to finely describe emergencies

[0007] However, the existing bridge monitoring systems are difficult to achieve the above-mentioned flexible control, resulting in a waste of data resources or difficult to meet the requirements of fine measurement of special events with high time resolution

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