Zhejiang Provincial Land and Resources Department launched a three-level emergency response to geological disasters. At 8 o'clock on the night of May 31, a meeting of the provincial flood prevention work was held urgently in the conference room of the provincial defensive counter on the 5th floor of the Zhejiang Provincial Department of Water Resources. At the meeting, the provincial Department of Land and Resources issued an emergency warning of the meteorological risk of geological disasters in Zhejiang Province in the next 3 days, and Hangzhou was also the emergency evacuation of 688 residents of 82 geological hazards. In fact, not only in Zhejiang Province, many provinces and cities across the country are facing different dangers of geological disasters. The General Office of the Ministry of Land and Resources issued a circular on May 9 promulgating the "Preliminary Plan of Remote Sensing Monitoring of Land Resources (Trial)". The circular proposes that in order to strengthen the construction of emergency remote sensing monitoring system for land resources and improve the capability of emergency response monitoring and rapid response and support services, a national emergency remote sensing monitoring liaison system shall be set up to establish an emergency monitoring liaison database covering all township and landowners' . As an important component of the emergency monitoring and response mechanism, the township and town land and resources offices should make it clear that one person serves as an emergency monitoring and liaison officer. According to the needs of emergency monitoring tasks, they should cooperate with the Ministry of Emergency Remote Sensing and monitoring work and coordinate and coordinate at any time to ensure emergency monitoring and timely response. To effectively address the disaster early warning and emergency work, IoT security equipment plays an important role in which, Pre-disaster warning Pre-disaster geological disasters and emergency response can be divided into two areas before and after the disaster relief, pre-disaster warning, real-time geological disaster monitoring system, crack alarm, wireless alarm devices and other equipment will be the first time to find danger in order to respond in a timely manner to reduce Unnecessary loss "Geological disaster real-time monitoring system" In 2015, Zhejiang Mobile launched the "Real-time Monitoring System for Geological Disasters". By utilizing the advantages of wide coverage of mobile 4G network and fast network speed, remote monitoring of geological disasters can be realized and a certain degree of disaster prevention effect will also be achieved. "Real-time geological disaster monitoring system" can be installed in the geological disasters, such as high-definition network cameras and other equipment, the use of mobile transmission network will be sent to the scene real-time monitoring center. Through large screen, computer or smart phone and other equipment, managers will be able to monitor all-weather and all-weather monitoring within a 1-2 km radius of the geological disaster point. The system can also record, playback, recall and store operations. After the geological disaster real-time monitoring system is completed, relevant departments can access the surveillance video at any time through a dedicated network to view the situation in a wide-angle view of the whole area and also view the situation in a particular area. The managers can understand the scene as soon as possible, And timely make scientific judgments and effective decision-making. Crack alarm landslide nemesis Crack alarm is mainly used to monitor the location of the crack movement, so the crack alarm is usually installed on both sides of the crack. When the crack detected is greater than the crack value set by the alarm, the alarm will immediately send an alarm signal to notify monitoring Personnel should immediately pay attention to view. Integrated geological disaster monitoring wireless alarm device Alarm monitor is a dozens of centimeters long cylindrical instrument, which can rock in the displacement, cracking and other signs, the first time start the sound and light alarm, alarm signals automatically sent to the monitoring department, and send text messages to the monitor cell phone , Let the masses of geological disasters point out the first time. The instrument is mainly used for real-time monitoring after the earthquake disaster warning to before the disaster occurred, a host can be equipped with 5 wireless sensor, the maximum transmission distance of 5 km, once the landslide, debris flow and other geological disasters signs , The instrument can be informed of the specific location of disasters, disaster types and other information. Emergency after the disaster After the occurrence of geological disasters, how to start scientific rescue at the first time is an important key to disaster relief mission. Video command dispatching, UAV reconnaissance and terrestrial 3D laser scanning system will be the first time the disaster feedback, an important basis for rescue command . Video command and dispatch system Why do scientific rescue, video command scheduling to rescue more timely and effective. Video command and dispatch can be combined with third-party data services, security alarm and voice dispatch to form a powerful integrated video application communication platform that enables multiple users to simultaneously visualize multiple levels of command dispatch and Remote discussion. Especially with the 3G network applications continue to mature, the application of mobile video command and dispatch in the rescue more practical. Mobile video command and dispatch To facilitate portable mobile devices such as smart phones and tablet PCs, relying on the 3G network, not only enables relevant personnel to feedback the on-site status to the rear command center in real time, realizes the interaction between the front and the back, And can effectively avoid the emergence of monitoring blind spots, to prevent failure to understand the scene and missed the best time to rescue. UAV investigation With the rise of UAVs, the drone's aerial photography immediately after the occurrence of the disaster at the address can quickly find out the specific location of the landslide, the length and width of the landslide and other data as well as the live images, providing reliable geographic information for disaster relief Information and win valuable time. Carrying digital cameras taking off, UAV real-time acquisition of disaster site data, aerial images can clearly reflect the site landscape, not only facilitate the command but also start a scientific rescue. In the UAV implementation of monitoring tasks at the same time, three-dimensional laser scanner for terrain data collection, professional staff to investigate the crack monitoring. The RIEGLVZ-4000 terrestrial 3D laser scanning system with long-range measurement capability of up to 4,000 meters and measurement speed of 300,000 points per second can be used even with low visibility such as dust, fog, rain, snow and so on The identification of multiple target echoes can be easily used in difficult environments such as mines. The great advantage of 3D laser scanning technology is that it can quickly scan the measured object, and can directly obtain high-precision scanning point cloud data without touching the object to be measured and the reflecting prism. In this way, the three-dimensional modeling and virtual reproduction of the real world can be carried out efficiently and rapidly. The three-dimensional modeling and the virtual reproduction are widely used in the fields of digital preservation of cultural relics, civil engineering, industrial surveying, natural disaster investigation, visualization of digital city topography, urban and rural planning. 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