" Drone " is a very hot word in recent years. What is a drone? Let's take a look at the explanation of the Encyclopedia: The drone is referred to as the "UAV", abbreviated as "UAV", which is a non-manned aircraft operated by radio remote control equipment and self-provided program control devices. From the technical point of view, it can be divided into: unmanned fixed-wing aircraft, unmanned vertical take-off and landing aircraft [1], unmanned airships, unmanned helicopters , unmanned multi-rotor aircraft, unmanned paraplanes and so on. The drones first appeared in the 1920s. In 1914, the First World War was in full swing. The two generals of Germany, Kader and Piccher, made a suggestion to the British Military Aviation Society: A small aircraft that is driven by a person and operated by radio allows it to fly over a target area of ​​the enemy and cast a bomb that was previously loaded on a small plane. This bold idea was immediately appreciated by Sir David Henderson, then chairman of the British Military Aviation Society. He appointed Professor AM Luo to lead a group of people to develop. The drone was used as a target machine for training. It is a term used by many countries to describe the latest generation of drones. Literally, the term can describe cruise missiles developed from kites, radio-controlled aircraft, and V-1 missiles, but in military terminology it is limited to reusable aircraft that are heavier than air.
There is a lot of talk about it above. In fact, it is probably an aircraft that can fly without people. The UAV we are going to talk about today is a small UAV in the civilian field, which usually consists of flight control, data link, power system, rack, positioning system, ground control system, and can be equipped with different airborne equipment for different fields. For example, an aerial drone equipped with a camera tool, a plant protection drone equipped with a spray tool, a drone equipped with a thermal imager can be used for a power inspection drone, and a drone equipped with surveying and mapping equipment. For mapping drones .
Today, we mainly talk about the topic of plant protection drones. The field of plant protection drones is an industry that has just emerged in China, although it has developed earlier in Japan, South Korea and Europe and the United States. In 1990, Yamaha Corporation of Japan launched the world's first plant protection drone for spraying pesticides. However, China began to have plant protection drones in 2013, and it was first applied to pesticide spraying in rice growing areas in the South. Until 2015, local governments began to frequently report the use of drones for plant protection. In 2016, the plant protection drones were introduced to the wind and the waves were well known.
Why do I say that not all drones that will fly will be able to do plant protection drones? In fact, pay attention to the quotation marks of "Meeting". This "Meeting" actually has two other meanings, namely "Hui" and "Hui".
"Hui" is the wisdom of "Hui". As the name suggests, UAVs should have certain intelligence and automation functions. In the current state of plant protection drones, most of them are still using model aircraft in the products and models of the operation. The scheme, the consumer-grade flight control equipped with the model aircraft, firstly relies on the manual operation of the plant protection drone for the operation. In fact, such a plant protection machine can only be regarded as a flying plant protection machine at any time, and there is no spray precision on the spray. Words. Since the accuracy of the flight is completely dependent on the long-distance manual operation of the flying hand (operator), the following serious deficiencies will result:
There are serious errors in the visual. In the course of flight, the flight route is not straight and the spacing is not accurate. As a result, there will be a strip between the A route and the B route that is too large to be sprayed into the leak jet, and vice versa. If the spacing is too small, a strip of spray will overlap and form a heavy spray;
When the liquid medicine is sprayed in the middle, if the flying hand is not found in time and effectively, the flying hand is still operating the drone to continue the operation, but at this time the drone has no medicine to sprinkle, and the flying into the air will cause the leaking spray. ;
When the spray is continued in the place where the spray was last interrupted, the flying hand can't accurately remember where the drug is missing. It is about to find a similar place to start spraying. The result is often the same as the above. And leaking spray;
Since the operation of the drone is completely dependent on the method of flight, the flight speed and the flying height will be seen suddenly, slowly, and slowly during the flight. When the speed is slow, the excessive concentration of the drug is too high, and after the fast, it will be too fast. Insufficient amount of spraying can not achieve the control effect;
Can not fly in a similar way, when working on high-lying plots and crops in low-lying areas, the spray width of the high-level plot will be reduced to leaking spray; the spray of the low-lying area will be magnified. Become outstanding.
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