Application of composite wing/fixed wing drone in public security industry
1. Features of composite wing/fixed wing drone:
The compound wing unmanned aerial vehicle (VTOL) is also known as the vertical take-off and landing (VTOL) fixed-wing unmanned aerial vehicle. It has the advantages of multi-rotor vertical take-off and landing, and can take off and land without the need of a runway. At the same time, it has long-lasting, low-noise, and fixed-wing. Advantages such as gliding are suitable for many fields of the public security industry.
The compound wing drone must have multiple motors in the vertical direction, and the aerodynamic efficiency is lower than that of the fixed wing, resulting in a much lower endurance than the fixed-wing drone. In general, battery-driven 7-8kg composite wing drones last for about 70-90 minutes, while the same weight of electric fixed-wing drones lasts about 180~200 minutes.
The composite wing/fixed-wing UAV has a fast flight speed of up to 20 m/s. It can reach a designated location within the jurisdiction in a short period of time, and has a long air time. Therefore, it can be fixedly deployed in the Public Security Bureau. At the top of the police station, the communication data link can cover the range of activities with a radius of 30km. Referring to the operation mode of the military drone , the operator uses the touch screen computer to operate the command indoors.
Schematic diagram of automatic unmanned airport with compound wing drone
Due to the fixed deployment location, the terrain, high-rise, no-fly zone and other constraints in the area have been recorded in advance, and the drone can be circumvented dynamically according to the constraint information, bypassing the high-rise and no-fly zones, and reaching the target in the shortest time. Point and hover the target area, and track and monitor the target area through the 30x zoom photoelectric pod. Generally, it is flying at a height of 120~300 meters from the ground. At this height, it can obtain the maximum monitoring field of view and ensure that the ground details can be seen after zooming. The weight of the drone is about 7-8kg, and it has a large wing area. Even if there is an accident, due to its aerodynamic shape, it can glides into a safe area to avoid damage to the ground targets in the urban area.
2. The police scene of the composite wing/fixed wing drone:
Starting from the characteristics of the composite wing/fixed-wing UAV, focusing on improving the performance of public security work and improving the working conditions of the police to reduce the sacrifice of the two angles, it can be applied to the following four aspects:
1. Lighting patrols in key areas and strips (roads, waterways):
Some vicious cases will lead to a concentration of social grievances, which will put a lot of pressure on the local police, such as the case of a female teacher who ran in the Leshan Green Heart Park in Sichuan in mid-December 2017. On December 19th, Yao Ping, deputy director of the Public Security Bureau of Leshan City and director of the Political Department led a team to investigate the prevention and control of public security in Green Heart Park. After investigations, the police identified six measures, including strengthening patrol prevention and control, adding police car police force, and conducting patrol prevention and control in a diversified mode such as car patrol, motorcycle patrol, and walking patrol for key time periods. More news: Another incident happened! A suspected victim of a Nanjing woman’s suspected night run was arrested.
The composite wing/fixed-wing UAV can solve the contradiction between insufficient police force and heavy patrol tasks. It will patrol the high-frequency and large-area drones of the drones, and cooperate with daily publicity to highlight the high-magnification zoom characteristics and patrols of the drones. Frequency, creating a publicity atmosphere for the police around, forming a deterrent posture of Skynet and reducing the incidence rate. Especially at night, the greater the warning patrol density for key sections, the more effective it is to reduce the incident rate. A search laser is mounted on the photoelectric pod on the drone, and the ground is patrolled to serve as a deterrent to the "police is on top of the head."
In cooperation with Skynet project and Xueliang project, the ground in the area is covered with no dead angle monitoring, while the composite wing/fixed wing drone is the commanding height of all monitoring. During the inspection, abnormalities can be found. You can pause at any time and switch to hovering. Observe that after the police situation is lifted, continue to patrol according to the line.
The flight speed of fixed-wing/composite-wing UAVs is generally around 20 m/s. If the composite wing with vertical take-off and landing is not considered, the life time of the electric fixed wing is generally more than 3 hours, and the carpet grid with a spacing of 300 m. Patrol can also patrol more than 60 square kilometers in a single time; for small areas, such as a 3 square kilometer park, it can be patrolled every 10 minutes, playing a dual role of patrol and deterrence.
2. Air surveillance command:
When a major alarm occurs (such as group incidents, serious criminal cases, explosions, etc., which threaten public safety accidents, threatening suicide, etc.), the composite wing/fixed-wing UAV can quickly fly from the deployment site to the target area, and the operator is on the map. According to the instructions of the police (such as the car deflagration at a crossroads, the police support is required), the touch finger can be applied to the map on the PAD, and the drone can automatically fly from the deployment site to the designated area and control the pod alignment. On the ground, the real-time video is broadcasted to the command network, broadcasted to all commanders and ground police, providing intelligence support for aerial perspectives throughout the process, facilitating command decisions and reducing sacrifices.
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Different from the multi-rotor UAV, the composite wing/fixed wing has a long air-storage time and is directly operated by the public security bureau of the deployment site. It does not require on-site personnel protection and does not affect or interfere with the site work. In addition, it can also be applied to the situation of the commander's air observation and check card, check the status of the police force, and remotely grasp the situation on the spot to facilitate making decisions.
3. Airborne forensics:
The arrest and evidence collection work is a difficult and dangerous work. Its characteristics determine that it often works in the middle of the night, and it has a long duration, high risk and sudden suddenness, which poses a great threat to the safety and health of the police.
Due to the extremely low noise, the composite wing/fixed wing can barely hear any noise at a height of 150 meters when it is concealed, and then hovering around a radius of about 200 meters, which can cover the large area of ​​the surveillance area and can be well concealed and detected. According to the movement of the target, the monitoring area is adjusted, the ground target is completely undetectable, and the police force can be hidden in a remote location to avoid exposure. In particular, the electric fixed-wing UAV has a battery life of more than 3 hours, and two or three take-off and landing times can last for one night. It has a strong ability to wait for the battle, and at the same time record video throughout, which is very effective for collecting video evidence.
Shanghai Baoshan District and Jiading District are located in large cargo vehicles near the outer ring. The crime of stealing steam (chai) oil has occurred year after year. The Shanghai police have to spend a lot of police every year to arrest them. Fengxian police also arrested during the arrest. I fired a gun. For example, the use of fixed-wing UAVs in similar cases can greatly reduce the intensity of the first-line civilian police. Due to the advantages of the aerial view, the risk of the on-site police can also be reduced.
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4. Search and rescue in the air, search for fugitives:
In the event of a missing person, a lost friend, etc., the composite wing/fixed-wing UAV is suitable for carpet search in a large area due to its fast flight speed and long battery life. The infrared load is searched for rescue and loss of personnel.
Thanks to the early loading of the Digital Elevation Model (DEM) in the area, the compound wing/fixed-wing UAV can automatically adjust the flight altitude and flight plan based on terrain fluctuations, avoiding collisions and allowing operators to focus on video search.
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In addition, when searching for fugitives in mountainous areas, villages, forests, deserts, etc., it is possible to carry out aerial search and acquisition for a long time, in a wide range and continuously, which can strengthen the grasp of the situation on the spot, optimize decision-making and avoid sacrifice. If the target moves, the target coordinates can also be sent to the ground police force through the communication data link, and the network can be broadcasted by means of the map navigation system, and the target can be tracked and captured.
3. Thinking of the composite wing/fixed-wing UAV in police landing:
Reconnaissance drones are mainly derived from military applications. Military drones, whose determination to carry out missions, can use fireworks to launch and recycle, and special operations (usually group-level) to operate and protect drones; and police drones , which are essentially civilian industries In order to improve the efficiency of an alternative means, the field must consider the cost and practicality of its means, and operate under the condition that the cost-effectiveness ratio is limited.
The development of fixed-wing in the civilian sector began to be explored in the late 1990s. However, although the sparrows are small and complete, the technology in the civilian sector is not mature enough and the cost is too high to be mature. As of 2006, with the maturity of civil autopilots, large-scale use began in the fields of aerial photography, photogrammetry, surveying and mapping. However, due to the high requirements for take-off and landing conditions, the accuracy of the autopilot is not sufficient to support the self-propelled take-off and landing. It has always had high operational technical requirements for operators (commonly known as flying hands), and even until recently, the police of the Ministry of Public Security’s police station organized no one. The training course for pilot aircraft is still based on the remote control of fixed-wing aircraft.
Since 2012, the booming development of multi-rotor drones has driven the rapid development of technologies such as flight control, cloud platform and image transmission. The cost of various technologies such as high-precision differential GPS has dropped significantly, and the technology has matured. It’s a burst. To this day, multi-rotor UAVs have been widely used in the police field, and the composite wing/fixed-wing UAVs will make up for the shortcomings of multi-rotors due to their advantages in endurance and flight speed, and play a role in more application scenarios. .
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1. The relationship between renting and buying:
There is a big difference in the level of exploration and use of police unmanned aerial vehicles in public security systems across the country. In economically developed areas such as Guangdong, Jiangsu, and Shanghai, police unmanned aerial vehicles have been widely used in daily policing, and the application level in some areas is already high. At the same time, in the western and northeastern regions, police unmanned aerial vehicles are still in the initial stage of exploration.
Therefore, there are different usage strategies for different regions. In the initial exploration stage, in the early stage of holding the police officer’s license for unmanned aerial vehicles, and the training is still lacking, in order to reduce risks, the public security system can adopt a combination of renting and purchasing to avoid training and operation. Risks such as safety, direct rental of drone inspection services. For example, on December 20, 2017, the fire in Fenghuang Mountain in Zhuhai was very concerned. The local leaders paid great attention to the investigation of the drone inspection service provided by the enterprise, and conducted aerial inspections on the designated routes every morning and evening.
In areas where the application level of the police unmanned aerial vehicle is already high, the UAV equipment can be purchased and used autonomously, avoiding the leakage of information caused by excessive participation of the enterprise, and can improve the use efficiency.
2. Direction of use:
With the rapid development of technology, we can foresee that drones will increasingly reduce the operational requirements of personnel, operators only need to point to the tablet computer in the office like the US military drone operator, ie Can be strategized, winning thousands of miles away.
For the maintenance of the drone, an auxiliary police officer can be responsible for moving the aircraft and charging in the initial stage, taking off and landing on the roof. It is expected that in the second half of 2018, after the unattended airport is mature, the aircraft can be fixed automatically and the battery replaced automatically. Through the dispatching system and the unattended airport, it is possible to schedule two aircraft to overlap for a reconnaissance time, and to maintain an uninterrupted monitoring capability for the target area for 24 hours. Due to the high degree of automation of unattended airports, personnel operations can be reduced, and aircraft training directly related to aircraft can be reduced, with a focus on computer operation training. The complicated maintenance, battery maintenance, etc., can be maintained by the drone equipment manufacturer on a monthly basis.
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