Geotechnical monitoring method, device and system based on NB-IoT narrowband IOT (Internet of Things)

Abstract

The invention provides a geotechnical monitoring method, device and system based on the NB-IoT narrowband IOT (Internet of Things). Different hardware sampling circuits are selected according to configuration, and the device can collect various types of sensor signals (such as frequency, voltage, current, etc.) at the front end, and calculates measured physical quantities (such as strain stress, displacement, settlement, tilt angle, etc.) through a built-in calibration scale, and can be connected with many types of sensors from multiple manufacturers. The wireless communication uses NB-IoT narrowband Internet network, and the NB-IoT has the advantages of wide coverage, massive connection, lower power consumption, low cost, etc. Each sensor directly communicates with the platform through the device, and there is no need to design a bus circuit, and avoids the trouble and cost of the charging of bus wiring. A lithium battery is employed as a power supply, and the commercial power or a solar cell panel does not need to be connected, thereby reducing the power supply cost, avoiding the damages to the power supply, and avoiding the disadvantages that the power supply is not stable and the cost in power compensation is high. The entire device is small in size.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering monitoring, and is mainly aimed at the data transmission of various sensors, such as the data transmission of stress and strain sensors, settlement displacement tilt sensors, water level gauges, etc., and specifically relates to a collection of data transmitted based on NB-IoT narrowband Internet and transmission. Background technique [0002] In geotechnical engineering, it is necessary to install and use various sensors to ensure the quality of the project and to ensure the safety of the project. For example, strain gauges are used to monitor strain, settlement sensors are used to monitor settlement, and displacement sensors are used to monitor displacement. The volume is also increasing. And with the development of science and technology, the current sensor data transmission is developing towards the wireless Internet of Things, and the data is displayed on the cloud platform ...

AI Technical Summary

Problems solved by technology

Because the project site is relatively complicated, the wired connection of each sensor is easy to be damaged by the construction site and some places are inconvenient to route, and the on-site power supply is also a huge problem. Some places in the project under construction can use mains power, and some places in the field can use solar panels. , mains wiring needs to increase finished products and site protection is a problem, and solar power generation in the wild also increases costs and has poor applicability

There are also GPPS wireless signal transmissions such as subways or tunnels and projects under construction. At present, wireless transmission mainly uses GPRS for long-distance transmission. GPRS has high power consumption and high cost. The number of nodes that the base station can support is relatively small, and the signal coverage is not very strong.

[0004] GPRS, CDMA and other wireless transmission methods have high power consumption, large size, high cost, and long construction period, which seriously affect the development and application of the Internet of Things in the field of geotechnical engineering, and restrict the development and application of automatic monitoring technology. Therefore, there is an urgent need for a Low power consumption, low cost, strong compatibility, can support multi-area environment with high coverage, can receive multi-manufacturer and multi-type sensor signals, can send to the platform through wireless network, and form a reliable IoT method and method through multi-strategy transmission device, for the implementation and large-scale promotion of the Internet of Things in engineering monitoring

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