Dynamic signal acquisition processing device

Abstract

The invention relates to a dynamic signal acquisition processing device, comprising a sensor, a dynamic signal acquisition instrument and a computer; in the dynamic signal acquisition instrument, an instrument amplifier is connected with an A / D converter which is connected with a singlechip; the sensor is connected with the instrument amplifier, and the computer is connected with the singlechip; the sensor is a differential resistance type sensor, and a power supply circuit of the sensor is a constant flow source circuit. Aiming at the dynamic signal acquisition of the differential resistance type sensor which is commonly used in engineering safety monitoring mainly, the special dynamic signal acquisition processing device is designed, the dynamic sampling frequency of the dynamic signal acquisition processing device is 10Hz to 200Hz and can be set within the range of the measuring range according to needs, and the dynamic signal acquisition processing device is convenient for carrying and can carry out real-time sampling to the signal of the sensor, the sampling solution and precision are high, and the device can automatically process and store mass data.

Description

technical field [0001] The invention relates to a signal acquisition and processing device, in particular to a dynamic signal acquisition and processing device suitable for engineering safety monitoring. Background technique [0002] The safe operation of hydraulic structures such as hydropower dams is a major issue related to the national economy and the people's livelihood. Therefore, during the construction of hydraulic structures, a large number of sensors are installed and buried on the surface and inside of them to monitor the structural behavior, which is very important for the safety of the buildings. Run for real-time monitoring. Due to the structural characteristics of hydraulic buildings, their natural vibration frequency is very low, and the response to harmful vibrations is slow. In addition, the development of dynamic monitoring instrument systems lags behind. The dynamic change characteristics of vibration and other working conditions, while the operation pro...

AI Technical Summary

Problems solved by technology

Due to the structural characteristics of hydraulic buildings, their natural vibration frequency is very low, and the response to harmful vibrations is slow. In addition, the development of dynamic monitoring instrument systems lags behind. The dynamic change characteristics of vibration and other working conditions, while the operation process of hydropower dams is actually a dynamic process, especially in floods, earthquakes, and rapid changes in water level and water flow, its dynamic characteristics are more important. At this time, static observation is often difficult. Many unfavorable data are captured, so that the observation results cannot accurately reflect the real changes of the dam, affect the accuracy and timeliness of decision-making, and cause safety hazards that cannot be ignored in the safe operation of the dam, and even cause the dam to collapse

At present, the sensors buried in hydraulic structures such as hydropower dams are generally differential resistive sensors. Generally, portable acquisition instruments are used to monitor point by point, or automatic monitoring equipment is used for automatic inspection. The sampling frequency is at the highest level of minutes, which cannot be carried out. Dynamic signal sampling has low sampling resolution and precision, which is not convenient for on-site mobile observation, cannot be automatically recorded, and cannot meet the needs of massive data processing and storage

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