Many teachers are unmarried girls who are too ashamed to hide in their offices and dare not come out.
A slightly more mature teacher chases children all over the world, trying to snatch back the "balloons" and destroy them.
It's a pity that there are too many. As soon as I paid one, another pile appeared.
In the end, I had no choice but to give up. I was so tired that I sat on the podium and smiled bitterly while looking at the condoms flying all over the classroom.
The directors of the primary school and junior middle schools, as well as the kindergarten principal, were so angry that they trembled with anger. The three of them went to Li Wenjun to complain.
Ten minutes later, Dong Qingjun and the others were called to Li Wenjun's office.
Li Wenjun looked at Dong Qingjun with a serious face.
Dong Qingjun and the three of them looked puzzled and like dead pigs who are not afraid of being scalded by boiling water: You are doing research, and you have to be scolded for this?
In fact, the three of them had been blowing all morning, and their cheeks were quite sore.
Li Wenjun couldn't help but laugh out loud: "Crazy, I asked you to study airbags, and the three of you played with condoms for me... You didn't see the expression on the face of the kindergarten principal."
It turns red and turns green, and turns blue and turns red, just like swallowing a fly and not being able to spit it out.
Dong Qingjun scratched his head: "We want to try whether the thick latex glue is suitable."
Li Wenjun said: "It's not latex, don't try it. Latex is too soft, has strong inertia and poor crack resistance."
Dong Qingjun: "What is that?"
Li Wenjun: "Let me remind you, this thing should have good anti-crack performance, no air leakage, can withstand a large pressure, and can also reduce the inertial force when the air bag is inflated."
He didn't want to directly tell them the results he knew. That would limit young people's thinking and research directions too much.
He hopes they can find more suitable and creative materials.
Dong Qingjun and the others exchanged looks and then left.
The three of them were discussing as they walked.
"Where's the rubber?"
"Rubber, isn't that what tires are made of? Can it blow up?"
"Aren't the tires inflated?"
The three of us went to the Materials Research Institute and got some rubber ones, and they thought they were okay. At least they were better than condoms.
Then I plan to research other aspects first while looking for more suitable materials.
For example, the question of how to inflate the airbag.
Li Wenjun said that the drug reaction caused a tiny explosion to inflate the airbag and pop it out at the same time.
The key is that after the air bag is inflated and the passenger's body part comes into contact with the air bag, the air bag must slowly deflate.
Otherwise, passengers will be like the first version of "Little Tao Dong" who was caught by the airbags on all sides and suffocated.
They experimented many times before determining the appropriate amount of medicine, which would at least ensure that the airbags would burst out without burning the passengers' faces.
Then this is the time to spray it out.
Hmm...this is more painful.
Being too sensitive is a killer.
If it is too insensitive, it will have no protective effect.
Dong Qingjun and others thought about whether it should be linked to the brakes, so that when the brakes were suddenly applied, the airbag would spray out.
I tried it later and it didn't work.
They were also scolded to death by Han Weijun.
The anti-lock braking system also takes effect when braking suddenly.
As a result, the driver avoided the tire skidding, the collision between the vehicles in front and behind, and the airbag in his own car.
One spray costs tens of thousands.
The cost of applying the brakes is too high.
Then Dong Qingjun and the three of them scratched their heads and thought about it again.
It cannot be linked to the brakes, and it will definitely not work if the people in the car press the button themselves.
Xiao Huang: "Huh? How about installing a big button in front of each seat? As soon as the person sitting in the car hits the button with their forehead, the airbag will spray out."
Dong Qingjun sighed: "You're so smart. Your forehead is bruised, so why do you think the airbag is useless? What if the car is hit from the side? Then everyone will be squeezed into a meat pie, and the airbag will not be deployed."
Just as they were talking, Sun Dacheng passed by them on a small three-wheeled bicycle.
Qin Hongling and Sun Jie are very busy recently, Cen Qin is busy taking care of Qin Hongling's second child, and Dong Weimin is thinking that the new batteries are all empty.
So Sun Dacheng was left here with Dong Qingjun.
Qin Hongling said that apart from blowing up "balloons" with her children, she could do anything.
The older Sun Dacheng got, the more naughty he became. At this moment, he wanted to ride a tricycle to hit the wooden model Tao Guangming and the others put on the roadside. As a result, the front wheel hit the curb first, and then the speed was too fast, and the front wheel suddenly stopped.
The rear wheel tilted up.
He flew out headfirst and was about to fall upside down.
Fortunately, Dong Qingjun had quick hands and eyes and picked him up by the collar.
Sun Dacheng was very unconvinced: "That annoying curb hits my front wheel every time. I will add a shield in front next time."
An idea flashed through his mind. Dong Qingjun turned around and said to Xiao Huang and Xiao Du: "Set a pressure sensor on the front bumper. When the momentum exceeds the set value, the electromagnetic pulse signal is used to turn on the gas generator to inflate and pop up the airbag."
Xiao Huang and Xiao Du looked at each other and nodded: "I think it will work."
"Yes, install them on the sides and back."
Han Weijun greatly praised Dong Qingjun's idea. As long as it doesn't interfere with his anti-lock braking system, it's good.
Then during lunch, Dong Qingjun and the others proudly told Li Wenjun about this.
Li Wenjun praised them greatly and then told them: "The position of the airbag must be carefully studied. The most important thing is the angle at which the airbag pops up."
Dong Qingjun scratched his head: "I can understand the installation location. Isn't it just to protect a few key parts? What about the angle?"
Li Wenjun said: "What is the normal driving speed of a car?"
Dong Qingjun: "Sixty to one hundred kilometers per hour."
Li Wenjun: "If there is an impact, no matter what the speed, it must stop within 0.2 seconds. Therefore, the faster the speed, the greater the force required to stop the car, and the greater the impact on the car and people."
You have no objection to this, right?"
Dong Qingjun nodded.
Li Wenjun: "Okay, let's say the speed is 60 kilometers per hour, which is not very fast. It stops within 0.2 seconds. The airbag pops up at 300 kilometers per hour, and the impact force generated is about 180 kilograms. What is the concept of 180 kilograms of force?
do you know……"
Dong Qingjun: "Probably, maybe, maybe, I don't quite understand."
Li Wenjun rushed forward and shouted: "Sun Jie!"
Sun Jie was chewing pig trotters when he suddenly heard someone calling him. He stood up and looked around blankly: "Ang?!"
Li Wenjun pointed at him: "Look. Sun Jie weighs about 180 kilograms. It is equivalent to two Sun Jies jumping up and sitting on a person."
Then the faces of Dong Qingjun and the three of them immediately wrinkled up.
Li Wenjun said: "Think about it, if it sat on a person's head, neck and other more vulnerable parts, it would kill the passengers and the driver directly. Therefore, there can be no mistakes in the angle and strength of the airbag when it pops up."
"
Dong Qingjun shuddered as he thought about the sheep's neck that was severed by the seat belt and the dummy head that was crushed by the airbag.
The three of them nodded blankly: "Ang, how can we avoid making mistakes?"
