Automatic data acquisition system of low-insulation vibrating wire sensor

Abstract

An automatic data acquisition system of a low-insulation vibrating wire sensor comprises a power supply module and a data acquisition module; the power module comprises a storage battery, an externalpower supply and a power management unit; the storage battery is connected with the data acquisition module; the power supply management unit is configured to selectively control the connection between the data acquisition module and an external power supply according to the working state of the system and control the charging and discharging of the storage battery; the data acquisition module comprises a channel switching circuit and a plurality of data acquisition channels, and each data acquisition channel at least corresponds to one vibrating wire sensor; and the channel switching circuitis configured to control the communication state of the data acquisition channel in a time-sharing manner so as to acquire data acquired by the corresponding vibrating wire sensor. According to the invention, the accuracy and stability of automatic measurement are improved.

Description

technical field [0001] The invention relates to a data acquisition system, in particular to an automatic data acquisition system for a low-insulation vibrating wire sensor. Background technique [0002] In water conservancy projects, two measurement methods are generally used for the measurement of safety monitoring instruments. One is manual measurement, which is suitable for the construction period of water conservancy projects due to its flexible measurement methods and limited by site conditions; the other is automatic measurement, which is limited by power supply, communication and other conditions due to its high work efficiency , applicable to the operation period of water conservancy projects. [0003] However, in actual work, the vibrating wire sensor is generally used for measurement. When the vibrating wire sensor itself is in a "sub-healthy" state with a low insulation value, the data deviation of the automatic measurement is large, and the measured value is not...

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Problems solved by technology

[0003] However, in actual work, the vibrating wire sensor is generally used for measurement. When the vibrating wire sensor itself is in a "sub-healthy" state with a low insulation value, the data deviation of the automatic measurement is large, and the measured value is not credible.

In addition, the quality of the vibrating wire sensor itself, the quality of the cable connection, and the connection of the cable core wire to the automatic collection equipment will cause the insulation of the entire line to decrease over time, which will affect the results of the automatic collection, and collection errors or failures often occur. Collection situation

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