BWSENSING: Build the first line of defense for geological disaster early warning

Equipments from BWSENSING, such as sensors, avalanche gauges, wireless inclinometers and rain gauges have been successfully used in various types of geological disaster warnings, playing a huge role in disaster prevention.

In recent years, geological disasters have brought great losses to the lives and properties of many countries. News from the Department of Geological Exploration and Management of the Ministry of Natural Resources: The Ministry of Natural Resources has launched a Level IV response to geological disaster prevention at 15:00 on June 12, 2023. "The Ministry of Natural Resources requires that the natural resources authorities of Guangdong, Guangxi, Yunnan, Tibet and other provinces (regions) should enhance risk awareness, strengthen bottom-line thinking, attach great importance to the prevention and response of the rainfall process, and do a good job in inspections, monitoring and early warning, consultation and judgment, disaster avoidance, defense force presetting and on-duty, information submission and other works[1].” According to the information, in this month“Sichuan Provincial Geological Hazards Headquarters Office requested to pay close attention to rainfall forecast and actual rainfall, and will research and judge the trend of geological disasters, carry out timely and intensive meteorological risk level forecasting of geological disasters; check the implementation of the disaster prevention responsibility system; strengthen the inspection and monitoring of dangerous areas such as slopes in front of and behind houses, mountains and cliffs, and gully mouths; do a good job in monitoring and early warning Information release [2]."

In order to prevent the occurrence of geological disasters, all kinds of monitoring equipment on the market play an important role. Its types mainly include landslides, debris-flows, ground subsidence, subsidence, ground fissures, etc. Under the influence of external factors, a large number of individual or chain-type disasters of landslides and flow disasters occur frequently every year, life and property safety suffers a great threat. Therefore, establishing an intelligent monitoring network for geological disasters is an inevitable measure and an effective means to prevent geological disasters from destroying. Among them, equipment from BWSENSING, such as sensors, avalanche gauges, wireless inclinometers and rain gauges have been successfully used in various types of geological disaster warnings, playing a huge role in disaster prevention.

In June 2022, BWSENSING successfully adapted and completed the slope monitoring of the first mining area of the Meihekou Open-pit Coal Mine. The product BW-DW100 series used in this case is a professional high-precision receiver launched for the application market of surface displacement monitoring and deformation monitoring. The receiver is designed based on high-precision navigation and positioning modules and supports BDS, GPS, QZSS, GLONASS With multiple systems and multiple frequency points, it can provide stable high-quality original observation output and millimeter-level high-precision positioning services. The receiver has high integration, high precision, low power consumption, and high cost performance. It adopts GNSS, 4G and BT integrated antenna, built-in Lora antenna, built-in temperature and humidity sensor and MEMS sensor, supports combined monitoring of acceleration, inclination and GNSS, and provides one RS232, one RS485, one tipping bucket rain gauge interface, supports Lora communication function, it is a professional millimeter-level positioning receiver with high cost performance. It is used in the fields of water conservancy and hydrology/water resources monitoring, engineering structure monitoring and land disasters. The supporting interface or Lora module is connected to sensors such as rainwater, cracks, environment, seepage pressure, etc., and the monitoring and early warning is realized through the 4G full Netcom network, the data is transmitted to the data center to provide data support for geological disaster early warning. When geological disasters occur, BWSENSING can monitor changes in the surrounding environment in real time, and send early warning information to relevant departments in time, so that corresponding measures can be taken to reduce casualties and property losses.

The wireless inclinometer sensor WF-WM400 which is high-speed wireless transmission inclination sensor is a miniaturized intelligent digital inclination sensor specially designed for structural health monitoring. Using rechargeable lithium battery,

it can work continuously for 24 hours on a single charge (continuous measurement and data transmission), and can be charged quickly with an external special charger. It can meet the needs of high-precision and high-frequency monitoring. With remote control and management functions, data can be transmitted to the cloud by connecting to a wireless router. In terms of network connection, the sensor has the function of automatic disconnection and reconnection, which can effectively avoid problems caused by connection loss caused by network abnormalities and server maintenance. Because it is a digital inclination sensor module, its linearity is easier to correct.

At the same time, the avalanche gauge BW-CM500, which is independently developed and produced by BWSENSING, is also used in the monitoring of road slopes in Nayong County, a sensor specially used for monitoring collapses, which can monitor the occurrence of collapses in real time. BW-CM500 Micro-power Earth Disaster Monitor includes the functions of inclinometer, accelerometer and others. It is a micro-power multifunctional intelligent instrument which adopts low-power MEMS technology and wireless output. The built-in large-capacity lithium-ion battery can be used for more than 3 years without maintenance. It complies with the "Technical Requirements for Geological Disaster Monitoring Data Communication" issued by the Ministry of Natural Resources. The product supports historical data storage when there is no signal, and uploads when there is a signal; it also supports timing wake-up and vibration wake-up and optional crack monitoring functions. The product supports 4G full Netcom network communication, and can output monitoring data such as three-axis inclination, angle between the plane formed by XY axes and the horizontal plane, angle between the projection of X-axis on the horizontal plane and magnetic north, and three-axis acceleration. The role of avalanche gauges in early warning of geological disasters is very important. It can warn the occurrence of collapses in advance and help relevant departments take timely measures to avoid casualties and property losses.

In addition to the above products, the rain gauge of BWSENSING can monitor the rainfall in the surrounding environment in real time, and send early warning information to relevant personnel in time when the rainfall reaches a certain threshold. The role of rain gauge in early warning of geological disasters is also very important. It can warn the occurrence of rainfall in advance and help relevant departments take timely measures to avoid the occurrence of mountain torrents.

Mr. Xia of BWSENSING Chengdu Branch said: "The application of these products of BWSENSING provides a strong guarantee for the prevention of geological disasters. They can monitor the occurrence of geological disasters in real time, detect and issue alarms in time, and avoid casualties and disasters. At the same time, the installation and maintenance of these sensors are also very simple, which can greatly reduce the risk of disasters.”

We believe that in the future, the geological disaster early warning equipment developed by Beiwei Sensing will play an increasingly important role and make greater contributions to preventing geological disasters and ensuring the safety of people's lives and property.