Abstract: With the development of high technology, more and more people have begun to understand the concept of drones, and they have begun to gradually apply them in life. Today, drones are used in various industries and fields. Application solutions emerge in an endless stream, almost just what you want to do. But there are also various drone platforms, and choosing the right drone can better complete the task.
How to choose a drone according to different needs?
1.Police, firefighting, investigation, maritime surveillance
This application requires high reliability and flexible take-off and landing during long voyages. At present, most of the practical police helicopters are the AF25B oil-powered unmanned helicopter platform, which generally adopts the imported AF25B platform and is equipped with imported mature flight control. The effect of investigation and evidence collection and aerial surveillance is also very satisfactory, and it can deliver disaster relief items of a certain weight, and even anti-riot items, and can also realize remote shouting.

2.Plant protection
Plant Protection recommends using an inexpensive unmanned helicopter platform. Because the payload of the helicopter is acceptable, and there is a very good airflow under the helicopter rotor, the pesticide can be blown to the back of the plant. However, because agricultural machinery has always been rough, maintenance is very problematic, and it can only afford the loss. Plant protection is mostly low-altitude manual flight, and the requirements for flight control, body platform vibration, and reliability are not high, just enough.
3.Aerial photography entertainment
Recreational aerial photography, or small-scale aerial photography required for promotional films, is sufficient to use a multi-rotor aircraft. This kind of aircraft is cheap, has little flight vibration, is economical and practical, and does not feel distressed when it falls. For aerial reconnaissance at a longer distance, only reliable unmanned helicopter systems or fixed-wing systems can be used.
4.Line inspection
Line inspection is the most common and traditional application of UAVs in electric power, oil, gas and water conservancy departments. Line and line inspection should be said separately. The wiring just needs to fly up and send the lead wire to the top of the wire tower. It can be hovered and launched. There is no requirement for reliability and over-the-horizon flight. The multi-rotor can meet the demand.
But when it comes to patrolling the line, the multi-rotor is a bit powerless. Reliability and battery life are unsatisfactory. Generally, a mature unmanned helicopter system should be used, together with mature flight control. If the AF25B is used with reliable flight control, it can carry out dual ground station relay control, and the autonomous line patrol distance can reach 100 kilometers. It is also worth mentioning that the payload of the helicopter can fully accommodate night vision equipment so that the effect of line patrol at night is better than that during the day.
5.Bridge inspection
Long-distance, large-scale conventional bridge monitoring is similar to line patrol, and it is still recommended to use reliable traditional unmanned helicopter systems. However, the use of multi-rotors is recommended for close-range monitoring of the underside of the bridge. Due to the limited structure, only the multi-rotor can easily place the detection equipment directly above the fuselage, which can realize the inspection of the underside of the bridge. This is a problem that helicopters have not been able to solve before.
6.Deliver a ring
Both multi-rotors and mini helicopters can be sent as rings, but relatively speaking, multi-rotors are easier to control and the shape is more sci-fi. But be careful not to use those aerial multicopters. Those multi-rotors are all model aircraft, and accidents that hurt people are not uncommon, and sad things like hurting the bride happen. It is recommended to buy a toy quadrotor directly from the toy store, and the plane will not hurt anyone if it crashes.