Li Wenjun: "It doesn't matter if you don't need an aircraft. You can also see it if you tie a camera to the top of the bamboo pole."
Tao Guangming followed Li Wenjun's method and searched for three days, and finally found the lost aircraft. The blades and fuselage of the aircraft had been pecked into disarray by birds.
The Aircraft Research Institute felt extremely distressed and cursed and took it back.
Li Wenjun asked the Aircraft Research Institute to add a discharge device to the drone. The power does not need to be too high, as long as it stings slightly when someone catches it.
Next time a bird takes the drone away, you can quickly use the button on the remote control to discharge the drone to force the bird to let go of the drone.
The Aircraft Research Institute took out the improved drone for test flight.
The crow is here again.
It is said that crows hold grudges very much, and they probably didn’t get over their grudges last time. Now they saw this black and buzzing thing flying again, and they swooped over to catch the drone again.
The people at the research institute hurriedly pressed the discharge button. The crow screamed, let go of the aircraft and ran away.
"It's done." Everyone clapped and celebrated.
Before they could put their things away, a group of crows came and bombarded them with bird droppings.
"What the hell, why is this bird such a bastard? When we develop the combat helicopter, we will kill all you little beasts."
"Damn it, are they collecting bird droppings to attack us?"
"Yue, this is a biological weapon."
-----
After Tao Guangming and Dong Qingjun experienced this incident, they understood that using drones to drive away birds would not work.
Because the effective control distance of the drone is too short.
But when the plane takes off and lands, the radius of movement exceeds five kilometers.
The two of them pulled their hair and thought about it again.
Dong Qingjun: "Although you can't send a dummy to the sky to drive away the birds. But can you use a loudspeaker to shout at the sky? Or use light to scare away the birds."
Tao Guangming: "But this is tantamount to indiscriminate damage. The sound is okay, but will the light hinder the pilot's field of vision?"
Dong Qingjun: "This is the same. You can check the information."
Then the two of them went to the library to scratch their heads.
They found a device called: a directional or omnidirectional long-range sound wave transmitting device.
Tao Guangming gave the Aircraft Research Institute a request to develop this device.
Tao Guangming clapped his hands: "Okay, as soon as this long-range sound wave transmitting device is completed, the problems of chasing birds on the ground and in the air will be solved."
Director of the Aircraft Research Institute: "Thank you. Originally, we asked you to help us chase away the birds. But you broke our drone and gave us several problems..."
After Yang Shouzhuo learned about it, he praised Tao Guangming greatly: "That's good. I didn't expect you to have such vision. This thing can be used as a weapon after it is developed."
Tao Guangming: "That's right, it depends on whether these people can do it."
Li Wenjun said that the principle of this thing is very simple. In fact, the amplifier sends voltage to the metal polymer film of the sound generator, causing the film to vibrate at a frequency of 60,000 Hz or higher to generate ultrasonic waves. In the air, the density of uniform ultrasonic waves fluctuates into frequencies that can be heard by the human ear. Because of its high energy and low attenuation, it can send sound remotely and directionally.
Institute of Materials Science and Technology: "Ah, we didn't hear it, we didn't hear anything. The metal polymer film has nothing to do with us, don't look for us."
-----
Tao Guangming struggled for many days and finally could rest. He ran to the top of the building, made a cup of tea, sat comfortably on a lounge chair, blew in the wind, and admired the beautiful scenery in the distance.
By the way, Li Wenjun's bastard city has now begun to take shape.
Tsk tsk, this kid's ability is really incredible.
Li Wenjun's voice suddenly rang in his ears: "Tao Guangming, I know where your private money is hidden."
Tao Guangming's hair stood up, he threw away the tea cup, jumped up, and turned around looking for Li Wenjun.
nobody.
Grass. The voice just now was clearly Li Wenjun's soft whisper.
Haunted? !
Or I was just too tired and hallucinating.
Tao Guangming poked his head out from the railing and took a look, confirming that Li Wenjun was not in the garden with a loudspeaker, then came back and sat down. He took another cup and poured a cup of tea.
As soon as he sat down, Li Wenjun's voice rang again: "Your personal money is hidden in the mezzanine of the drawer where you put your underwear."
Tao Guangming trembled, stood up from the recliner, reached for the door, then rushed downstairs as fast as he could, and ran into Li Wenjun's office: "Li Wenjun, it's haunted! Damn it, you scared me to death. There's a person like you up there. 's clone."
Li Wenjun is not in the office.
Tao Guangming was completely frightened. He ran downstairs, baring his teeth and dancing like a madman: "Li Wenjun, where are you? Come out quickly."
Li Wenjun and others were in the cafe across the street, looking sympathetically at Tao Guangming's nervousness in the garden.
"How about calling him in."
Dong Qingjun couldn't bear it. After all, they are comrades who have chased birds together, so we can't just bully him.
Li Wenjun smiled: "Just ask him to come in."
Dong Qingjun used the things on the table to adjust his direction and faced Tao Guangming in the garden: "Coffee shop."
Tao Guangming was running around in the garden when he suddenly heard Dong Qingjun talking in his ear again. When he turned around, he didn't see Dong Qingjun, and he was completely devastated.
He covered his mouth and dared not move: "Ah, it's so scary. What happened today?"
Dong Qingjun covered his face, walked out, put his finger in his mouth, and whistled super loudly.
Tao Guangming looked around blankly, and finally saw Dong Qingjun. He hurriedly ran over as if he was seeing a savior: "Let me tell you, those people have secretly built a cemetery in the back mountain. This place is starting to be haunted."
Dong Qingjun patted his shoulder sympathetically: "Tsk. No wonder Director Li only scares you every time. You are so scary."
Then he went inside.
Tao Guangming looked confused: "No, what did you say? That bastard is not here at all."
He followed Tao Guangming and Dong Qingjun in, and then saw several leaders of the institute inside, surrounding Li Wenjun.
There was a small box on the table, and a round, black and numb thing like a pot lid.
Tao Guangming suddenly realized that the sound he heard just now was made by Li Wenjun here.
He pointed at Li Wenjun, his eyes widened, and asked silently.
Li Wenjun sneered: "The directional long-range sound wave transmitting device. They have made it. I just tested it and the effect is pretty good."
Tao Guangming cried in anger, but he couldn't show it, so he could only cover it up with disdain: "Hey, this little thing of yours can scare me."
Li Wenjun said: "Don't underestimate it. The one with high power can really be used as a weapon. We designed it to be adjustable. We only use the lowest energy level because we are afraid of hurting you."
There happened to be a bird sitting on a big tree in the distance.
Tao Guangming pointed at it: "Come on, try it."
