Intelligent monitoring acquisition instrument for vibrating wire sensor

Abstract

The intelligent monitoring acquisition instrument comprises a box body and a polycrystalline silicon solar cell panel connected to the box body, and N vibrating wire sensor interfaces, a power switch, a solar charging interface and an RS485 communication interface are arranged on the box body; a control system is arranged in the box body and comprises N relays, a signal acquisition module, a microprocessor unit, a 4G communication module, a power management unit, an RS485 communication module, a storage battery and a solar charging controller; each vibrating wire sensor interface is correspondingly connected with one relay, the output ends of all the relays are connected to the signal acquisition module, and the electromagnet control end of each relay is connected with different IO pins of the microprocessor unit. During working, the microprocessor unit controls the relays to act, signals of sensors of different channels are collected in a polling mode, and electric quantity can be saved.

Description

technical field [0001] The invention belongs to the technical field of intelligent monitoring, and in particular relates to an intelligent monitoring and collecting instrument for vibrating wire sensors. Background technique [0002] In recent years, the vibrating wire sensor is a typical non-electrical measurement sensor. Its physical structure is simple, the device is durable, the result is accurate and reliable, and the working stability is good. Since the vibrating wire sensor directly outputs the natural frequency signal of the vibrating wire, Therefore, it has the characteristics of strong anti-interference ability, little influence of electric parameters, small zero drift and little influence of temperature. At present, it is widely used in construction, foundation pit construction, tunnel and bridge support structure stress monitoring, earth pressure monitoring and other engineering projects. [0003] The main function of the vibrating wire acquisition instrument is...

AI Technical Summary

Problems solved by technology

[0003] The main function of the vibrating wire acquisition instrument is the data acquisition of the vibrating wire sensor. In the actual engineering field, the existing vibrating wire acquisition instruments on the market have the following shortcomings: (1) The vibrating wire acquisition instrument commonly used in engineering now The instrument cannot realize the mutual compatibility of sensors with multiple communication protocols. The existing vibrating wire sensor acquisition instrument can only obtain the signal of the vibrating wire sensor according to the set monitoring frequency, and when the daily monitoring frequency is high, the vibration sensor acquisition instrument will be significantly reduced. When the monitoring frequency is low, it cannot meet the requirement of increasing the intensity of monitoring data when the monitoring data output by the vibrating wire sensor exceeds the warning value. The self-contradictory problems of long test use time and low monitoring frequency, and real-time performance in emergency situations require high monitoring frequency, both of which lead to great limitations in the practical application of engineering

(2) The traditional vibrating wire sensor acquisition instrument does not consider the long-term use of its own power supply, and generally uses an external power supply without considering the power consumption. Most of the existing vibrating wire acquisition instruments currently use only Lithium battery is used for power supply, but in the process of use, the continuous acquisition time is usually more than 30 hours, and only using the internal lithium battery cannot guarantee the power supply in the application process

(3) After the existing collectors on the market collect data, they upload it to the cloud server. The upload method is relatively simple, and it also needs the support of the network. However, in areas with poor network signals, data will be lost, resulting in engineering monitoring process. increase in cost

(4) Currently commonly used collectors have complex structures and are not easy to operate and maintain later

[0004] Due to the existence of the above problems, there is no vibrating wire sensor intelligent monitoring and acquisition instrument in the domestic and foreign markets that can realize long-term external power supply, wireless data collection and transmission, and personnel inspection reading operation.

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