System testing, application and demonstration

In order to ensure that perfect and practical software and hardware products are provided to the demonstration units, and the relevant technical indicators and performance of Beidou are comprehensively tested, the project team adopts the method of developing and testing, and selects representative areas throughout the country for testing. According to the test conclusion, improve the system in time, summarize the application skills of Beidou technology in geological survey, and standardize the application process.

Test scenario 1: urban streets in Xiamen (Figure 6-32)

Test contents: ① communication and vegetation development of Beidou at low latitude; ② The communication success rate of Beidou in urban streets; ③ Stability of the connection between Beidou Bluetooth terminal and PDA; ④ Communication of Bluetooth module of Beidou vehicle.

Testing process: First, along the main streets of the city, choose the place where vegetation develops to test: after a period of testing, take the bus and put the Beidou module in the front of the car, with the module facing the front. In the meantime, keep the Beidou Bluetooth module connected to the PDA and submit the location.

Figure 6-32 Beidou application test scenario 1

Test results: Beidou information transmission success rate is 78%, and the module success feedback rate is 92%.

Results Analysis: ① In the area where full coverage is achieved with lush vegetation, the signal strength of Beidou is relatively weak, and the success rate of sending short messages is relatively low, generally around 70%. (2) the direction of the module should be kept in the south. When the azimuth is northwest, northeast and north, the signal strength of Beidou is weak. ③ Urban high-rise buildings have obvious shielding effect on Beidou signal when users are in the south. ④ The Bluetooth connection between Beidou Bluetooth module and PDA is stable, and there is no disconnection phenomenon, which can meet the needs of short-distance splitting operation in the field.

Test scenario 2: Ali region, Tibet, plateau no man's land (Figure 6-33).

Test contents: ① the adaptability of Beidou equipment in high altitude areas; (2) The success rate of position submission when the vehicle is driving at high speed; ③ Endurance of the equipment.

Test flow: Select the typical landforms in Ali, Tibet for manual operation test, put the Beidou module at the window position when riding, and report the position continuously. The exam lasts for 4 days.

Figure 6-33 Beidou application test scenario 2

Test conclusions: ① High altitude has little effect on the performance of Beidou equipment. ② In high altitude areas, because there is no shelter, the signal strength is better than that in urban areas, and the success rate of Beidou positioning communication is relatively high, and the success rate can reach 92% when the signal is good. ③ When the vehicle is driving at the speed of 100km/h, it has no obvious influence on the Beidou signal, but the driving direction of the vehicle has a great influence on it. Driving in the south, the signal is better, but it is worse in the north. ④ Beidou equipment has good endurance and can meet the needs of all-day field work.

Test Scenario 3: Daxinganling Forest Covered Area in Heilongjiang Province (Figure 6-34)

Test content: Applicability of Beidou in low latitude forest-covered areas.

Test process: From 2065438 to July 2002, the project team conducted a test in Daxinganling area to test the signal strength and application mode of Bluetooth Beidou communication positioning terminal in forest-covered areas.

Figure 6-34 Beidou application test scenario 3

Test conclusion: The forest coverage rate has an influence on the signal intensity of Beidou module. When the coverage is serious, the signal intensity of Beidou positioning is weak. We can obtain the location information through GPS positioning, and then send the location information to the residents through Beidou communication.

Second, the application demonstration

Since 20 1 1 was popularized at the beginning of the year, the project team has selected dozens of field project teams for demonstration application in difficult areas such as southwest, northwest and northeast according to the characteristics of Beidou technology and geological survey. Participating units include Xi 'an Geodetic Center, Shenyang Geodetic Center and Chengdu Geodetic Center. 7 provincial geological survey institutes: Tibet Geological Survey Institute, Qinghai Geological Survey Institute, Xinjiang Geological Survey Institute, Sichuan Geological Survey Institute, Yunnan Geological Survey Institute, Heilongjiang Geological Survey Institute and Inner Mongolia Geological Survey Institute; And two demonstration areas, namely, Qinghai East Kunlun1:50,000 Surveying and Mapping Project and Daxinganling1:250,000 Surveying and Mapping Project.

Each unit selects field projects with typical working environment for demonstration and application, and * * * involves 27 field work projects. They are:

1) Yunnan1:50,000 shizong county, luxi county, Lund and Shede regional adjustment;

2) Remote sensing geological survey of mineral resources in Bangong Lake-Nujiang metallogenic belt (Tibet Geological Survey Institute);

3) GPS monitoring of key areas in Dadu River Basin;

4) Demonstration project of mineral prospect investigation in Qingshizui area, Menyuan County, Qinghai Province;

5) Demonstration project of mineral prospect investigation in Qingshizui area, Menyuan County, Qinghai Province:1:250,000 Bashkurgan Sheet (J46C0010) and Mangya Town Sheet (J46C00200 1) regional geological survey (revision) project;

6) Detailed investigation of geological disasters in Yushu Prefecture, Qinghai Province;

7) Mineral prospect investigation in Kuruqi area of Molidawa Banner, Inner Mongolia;

8) Mineral prospect investigation in Shuanglingzi area, Fengcheng City, Liaoning Province;

9) Mineral prospect investigation in Bayanjie area of Molidawa Banner, Inner Mongolia;

10) Benxi County (K51E017017), Caohezhang (K51E018017), Tian Shifu (.

1 1) Mineral prospect survey in Kunlun River area, Golmud City, Qinghai Province;

12) Pre-survey of copper polymetallic deposits in the middle reaches of Laling Huolu, Golmud City, Qinghai Province;

13) comprehensive remote sensing survey of mineral resources in the western Kunlun metallogenic belt;

14)1:250,000 Jinghong, Lancang, Menghai and Mengla (domestic) areas;

15)1:50,000 Banpo, Dashan, Liuqian, Mangbang Street, Yakou Street and Fangguan area adjustment;

16) Xinjiang1∶ 50,000 four regional surveys in Kalan-Chakurt area of Fuyun county;

17) regional geochemical exploration of Hami city sheet and Yamansu town sheet in Xinjiang1∶ 250,000;

18) Regional Geological and Mineral Survey of Team 4 of Nenbei Farm of Zuo Hu Beach Commune in Yangshu Village and Muhetun, Heilongjiang Province1:50,000;

19) Tibet1:50,000 Laguocuo area (144E024024, I45E02400 1, H44E00 1024, H45E00 1) 4

20) Remote sensing geological survey of mineral resources in Bangonghu-Nujiang metallogenic belt;

2 1) 1 ∶ 50000 Regional Geological Survey of Tubujia, Numa, Nianmu and Lianbian in Tibet;

22) Remote sensing geological survey of mineral resources in Bangonghu-Nujiang metallogenic belt (Sichuan Geological Survey Institute);

23) Five regional surveys, including Inner Mongolia1:50,000 Barun Bogla;

24) Mineral prospect investigation in alatan Heli area, Wudongqi, Inner Mongolia;

25) Mineral prospect investigation in Manzhouli-Zhalainuoer area of Inner Mongolia;

26) Qinghai East Kunlun1:50,000 (J46E0240 13, J46E0240 14, I46E00813, I46E010655).

27) Adjustment survey of base level in Heilongjiang Province1∶ 250,000 Kaikukang, Tahe County and Xinjie.

Figures 6-35 to 6-38 show the working scenes and system screenshots of some demonstration projects.

Figure 6-35 "Heilongjiang1∶ 50,000 Nenbei Farm Team 4 and other four regional surveys" field work site

Figure 6-36 "Yunnan1:50,000 shizong county, luxi county, Lund and Shede Areas Adjustment" Project Demonstration

Figure 6-37 Real-time monitoring of Qiangtang basin and its surrounding key basins by DGSInfo system.

Third, typical cases

In August, 20 1 1, the project team demonstrated the deployment of Beidou system and the application of 1∶50000 regional dispatching project in East Kunlun (200 km southwest of Golmud City, Qinghai Province, with an altitude of 4600m). The field project team specially selected the field routes with high altitude (above 5,000 m) and harsh working environment for system application test, and all the field routes were equipped with Beidou mobile terminals to explore the application mode of Beidou system in difficult and dangerous environment.

Figure 6-38 Field Route Tracking in Ali, Tibet

1. On-site rescue support

On the way back to the station after the line work on a certain day, the field geological team members had a mechanical failure, and the accompanying team members got in touch with the station in time through the Beidou terminal. After receiving the rescue information from the on-site team members, the station immediately dispatched a vehicle to carry relevant maintenance equipment for rescue according to the location of the accident vehicle and the cause of vehicle failure sent back by the on-site team members, thus solving the problem in time (Figure 6-39). Vehicle failure and personal injury are common problems in field geological work. In the past, if you encounter similar emergencies, because the field route group can't get in touch with the station, you can only wait for rescue passively, or some team members return to the station for help according to the original route before departure, which poses a threat to the personal safety of geological team members. Even if the resident infers that the on-site team is in an emergency according to the time, because it is impossible to accurately locate the accident site and understand the cause of the accident, it can only send a large number of people and vehicles to rescue according to the original route before departure, which is quite blind and often deviates from the actual accident site. Many times, the field geologist may need to spend a night in the cold weather in the wild and become the "leader" gloriously. Beidou system has changed the traditional field rescue mode, from passive to active, from blind implementation to accurate positioning, in sharp contrast, which can effectively avoid some safety accidents.

Figure 6.39 Contact with the resident through Beidou terminal.

2. On-site work guidance and communication

In the demonstration work, the field team used the digital mapping system combined with the Bluetooth Beidou terminal to automatically report the location to the resident in real time, and exchanged short messages with adjacent project teams through short messages; Once, the resident teacher judged that the route interval between two adjacent field groups was too close according to the real-time travel route through the resident monitoring and command system, and one field group deviated from the original route, and informed the field group to pay attention to and correct the travel route in time through SMS, thus avoiding the repetition and waste of field work caused by the close route and the similar observed geological phenomenon between adjacent field groups. At the same time, according to the current position submitted by the field staff, the resident teacher guides the field team on some field work contents, typical field geological phenomena and matters needing attention, which is beneficial to the discovery of some typical geological phenomena and rock masses (Figure 6-40). However, in the past work, due to the lack of communication means between the field teams and between the field teams and the resident, when the field teams found some typical phenomena, they could not get effective guidance.

Figure 6-40 Real-time communication between resident and field personnel using Beidou.

Fourth, the application mode summary

In the process of demonstration and application, the project team cooperated closely with the field staff, explored boldly, focused on summarizing the use mode and skills of Beidou technology, gradually formed a set of mature and effective Beidou application methods, and compiled the Technical Guide for Digital Field Geological Work Management and Service, which promoted the integration of Beidou and geological work.

The main modes and methods of Beidou application in geological survey are listed below.

1. Promote business communication and improve work efficiency.

Using the short message function of Beidou, geological team members can easily contact with nearby personnel or stations, promote business exchanges and effectively improve work efficiency. Especially in regional dispatching work, adjacent lines are several kilometers or more apart, and there is a certain correlation between geological phenomena. In the past, without communication tools, geologists had to fight independently and could not communicate with each other until they returned to their posts after the route work was completed. Inexperienced teams can't consult other colleagues at the first time when they encounter geological phenomena that are difficult to identify, and miss the best opportunity to solve the problem. Now, with the help of Beidou, geological team members can exchange observed geological phenomena and work progress anytime and anywhere, which makes it possible to conduct comprehensive analysis in the field, actually expanding the observation range of the route and helping to form a correct understanding. In addition, field personnel can send difficult questions to the station through Beidou SMS, and then experts in the station can consult and guide the field work in real time to ensure the quality of data collection.

2. Establish daily communication to ensure the safety of personnel.

Different from satellite phones or walkie-talkies, Beidou terminal equipment has the characteristics of relatively low price, unlimited communication distance, simple operation and strong accessibility. It can be equipped in the hands of every geological team member and become a daily communication tool for field geological work. Establishing regular communication channels is the premise and key to ensure site safety. In case of danger, field personnel can use Beidou equipment to send distress signals to nearby routes or stations, and nearby players or stations can organize rescue in time. At the same time, the emergency SMS will be monitored by the superior command node, and the safety officer will be notified automatically by SMS, and then the safety officer will report to the relevant leaders or institutions quickly. If a major safety accident occurs and the station cannot solve it by itself, the superior management department can dispatch external forces to carry out rescue.

The safety guarantee brought by Beidou is mainly reflected in reducing the probability of dangerous events. In the past, field safety accidents occurred frequently, and the consequences were mostly serious. The main reason is that the information is not smooth, the rescue is not timely, and even the location of the accident personnel cannot be confirmed, and the best rescue opportunity is missed. Now, using Beidou's position reporting mechanism, the resident and superior command nodes can know the work situation of field personnel in real time and master their travel trajectory. If the on-site personnel are in distress for help, they can rush to the scene of the accident for rescue at the first time; Even if the on-site personnel are too late to ask for help in case of emergency, the resident can find that the team is absent for a long time and other abnormal situations, and can also conduct search and rescue along its route.

3. Convenient contact with the outside world and humanistic care.

For geologists in no man's land, the beginning of field work means the interruption of contact with the outside world and the reunion with their families. After intense and hard work, if you can talk to your family, even if there are only a few short messages, it will be great support and encouragement for geological team members. The combination of Beidou's command function and SMS has realized this wish for geological team members. Through this function, the Beidou terminal of the geological team becomes a mobile phone. Although there is no call function, it can communicate with mobile phone networks all over the country through SMS, and can contact relatives and friends at any time, which fully embodies the humanistic care of geological work management.

4. Real-time situation monitoring is beneficial to management and scheduling.

Using DGSInfo and GSIGrid field geological survey management service and guarantee system, the project manager can monitor the field work in real time, and master the route trajectory and communication content of each geological team member, whether in the field station or the command center. In the field station, the person in charge of the project can make a comprehensive analysis according to the monitored route trajectory and short message content of the field team, guide the work of the field team, correct the mistakes in understanding in time, and ensure the quality of work; In the command center, the project manager can contact the on-site project leader through Beidou SMS to convey the latest notice, supervise the project progress and achieve the purpose of command and dispatch.

5. Expand communication advantages and provide special services.

The communication function of Beidou builds a bridge between the city and the no-man's land. The command center can simplify and compress the rich information resources, and then push them to the field personnel through Beidou SMS to provide them with characteristic information services.

At present, the special services realized by the system include information inquiry of unit announcements, recent user inquiries, regional early warning and background information inquiry of geology, geography and humanities.

1) unit announcement information query. The command node can simplify the important information of the unit and put it on the server. The project team in the no-man's land can find out the latest trends of the unit through the Beidou equipment inquiry announcement, and grasp the important information such as salary increase and title evaluation in time.

2) Recent user queries. If the field personnel need to find nearby Beidou users in normal work or emergency, they can send the command of "Recent User Query" to the server, and the server will calculate the nodes closest to the users according to the latest positioning data of all users, and then return the communication addresses of these nodes to the users in the form of short messages.

3) Regional early warning and background information query. Before carrying out field work, first investigate the target area and collect and sort out the background of geology, geography, humanities and risk factors in its key areas. Finally, the short messages of Beidou are simplified and stored in the database to form a set of regional early warning and background information database, so that geologists can provide rich background information query services when they enter the target area for the first time and provide necessary tips and early warning for field work.

Fig. 6-4 1 database of early warning plan established for Bayan Street in Northeast Inner Mongolia; Figure 6-42 shows the regional map of field engineering safety early warning in this area.

Figure 6-4 1 plan library data table screenshot

Only by sending a message of obtaining safety information to the central commander, the field personnel can know the risks, avoidance methods and emergency treatment measures in the area, which greatly improves the safety factor of field geological work, provides the premise for the front-line staff to work safely, and is also an innovation in the field safety work of geological survey.

Figure 6-42 Field Engineering Safety Early Warning Area Map of Bayanjie Area in Inner Mongolia