VOA慢速英语2015 法国农民使用无人驾驶飞机检查作物

 

French Farmers Use Drones to Examine Their Crops 法国农民使用无人驾驶飞机检查作物

It used to be mostly the military that used small, unpiloted aircraft, called “drones.” The little planes were very costly¹. But as they have dropped in price more people have begun to use them. Rescue workers and farmers are among the new users.

A company in France is using drones to help farmers examine their crops and limit the amount of fertilizer they use.

The fast rate of development of computer technology, image sensing devices, satellite navigation and smartphones has led to lower-priced drones. Researchers and developers have learned how to build smaller and less-costly drones sought by individuals, companies and governments.

Moviemakers are using drones to film from the sky. Historians use them when they explore ancient buildings. Rescue workers use them to look for people. And now farmers are using them to monitor their crops.

Romain Faroux is a French businessman who starts companies. His father was a farmer. He believed drones could help farmers. He helped create a company that developed a small drone that could be controlled by people on the ground. They called it “Agridrone.” It uses a special “optical sensor²” to examine crops.

He says the technology used is similar to that used by smartphones -- except it has wings. He says the industrialization of electronic parts for smartphones and tablets lets them get the technology -- including GPS -- at a very low price.

A computer program directs the drone to fly over the crops. The sensor on the drone records four different-colored “bands” of sunlight that are reflected off the crops.

Jean-Baptiste Bruggeman is a farmer. He says the drone flies over his crops at different times of the season. He says this provides a lot of information about his crops.

He says the drone pictures show him the exact amount of fertilizer the crops need. He says it also shows exactly where the fertilizer is needed. Some areas of a field may need more than others.

As a result, Mr. Bruggeman says there is reduced nitrogen from the fertilizer after the harvest. This helps nature.

Romain Faroux says farmers use information gathered by the Agridrone to place fertilizer only in areas where it was needed. This saves money and reduces pollution. Before they used the drones, farmers would put the same amount of fertilizer everywhere.

Drones also save time because farmers can examine up to three hectares in about a minute.

Words in This Story

navigation – n. the act, activity or process of finding the way to get to a place when you are traveling in a ship, airplane or car, or walking or hiking

smartphone – n. a mobile phone that lets users connect to the internet

monitor – v. to watch, observe, listen to or check (something) for a special purpose over a period of time

optical sensor – n. a device that detects or senses heat, light, sound or motion and then reacts to it in a particular way

GPS – n. Global Positioning System; a radio system that uses signals from satellites to tell you where you are and to give you directions to other places

band – n. a strip of something that is different from what is around it

1 costly   

adj.昂贵的，价值高的，豪华的

参考例句：

• It must be very costly to keep up a house like this.维修这么一幢房子一定很昂贵。
• This dictionary is very useful,only it is a bit costly.这本词典很有用，左不过贵了些。

2 sensor   

n.传感器，探测设备，感觉器（官）

参考例句：

• The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。
• He plugged the sensor into a outlet.他把传感器插进电源插座。