The monitor shows the iron from the opposite direction to the driver Wu Bin
What is the metal block suddenly flying from the front? The reporter learned from the traffic police department in Wuxi that the unidentified metal film that attacked Wu Bin was sent to the Public Security Department of Jiangsu Province for technical appraisal. The police are also trying to follow up on various clues.
9mm Tempered Glass Instant Breaks
"We looked at Wu Bin into the company eight years ago and Wu Bin did not rescue it. I was very uncomfortable in my heart. I collected these two days," said Jin Baizheng, deputy chief engineer of Hangzhou Changyun Group, responsible for automobile accidents and maintenance for more than 20 years. Data, organize staff, investigate the cause of the accident."
Jin Bozheng said that Wu Bin's coach is Jinpo Youth Neoplan, which is 12 meters long and 35. They learned from the bus's GPS positioning system and discovered that at the time of the incident, the bus speed was 94 kilometers per hour and the road was smooth.
The double-jacketed windshield of Neoplan's front window consists of two sides of tempered glass plus adhesive glue, with a thickness of approximately 9 mm. In line with national standards, it can guarantee 2.26 kg iron ball from 4 meters high, not broken.
What colleagues in the maintenance department most wanted to know was what broke through the windshield and crashed Wu Bin's abdomen, causing Wu Bin's liver to break? Why is power so great?
Metal debris suspected brake drum
"The wounded iron piece is about 30 centimeters long, 15 centimeters wide, and 1 centimeter thick. It is an irregular ring-shaped piece and weighs about 2.5 kilograms." Wu Gang, an eyewitness of the scene, said Wu Gang's colleague, "I know this kind of debris, It should have come from the brake drum that was broken on the opposite vehicle!"
Wu Gang said: “The iron sheet is smooth on the front and there are obvious signs of brake wear on the back. Those who have driven the truck can recognize it at a glance. I watched the surveillance video at that time and I highly doubted that the debris was from the opposite lane. The big truck that passed by was popping up in the rear wheel...†Jin Bozheng, deputy chief engineer of Hangzhou Changyun Group, also agreed with Wu Gang’s judgment. “The maintenance department often comes in contact with a similar brake drum and flies out to hurt people.â€
Missing the deceased
The traffic police finished the flow with tears
"This is a superman."
On June 1, Wu Bin’s body was returned to his home in the five districts of Zhaohui, Hangzhou. Wu Bin’s colleagues, friends, rescued passengers, as well as unknown Hangzhou residents and even outsiders rushed to mourn. Hundreds of wreaths and thousands of skeletons show people's respect for heroes. "It's not what the average person can do." This is the most common sentence spoken by those who come to condolences.
"In connection with his injuries, Wu Bin was able to complete a safe stop in such a painful situation, which showed that his thinking was very clear and had a very high professional quality." Fang Zheng said the doctors were very shocked.
When writing transcripts to passengers, Cao Jianping, who had dealt with countless traffic accidents, couldn't help but cry: “The bus brakes are straight, and a driver whose liver has been suddenly punctured can only do this with willpower. Ah! This is a superman."
technical analysis
Flying metal sheet produces 90 kg·m/s impulse
According to Wu Gang, an eyewitness and Wu Bin colleague at the scene, the iron piece that slammed into the bus was likely to be a piece of debris flying out of the brake drum of the opposite vehicle. In order to find out the cause of the accident, Deputy Chief Engineer of Hangzhou Changyun Group, Jin Baizheng, hired Associate Professor Wang of Mechanical Engineering of Zhejiang Jiaotong Vocational and Technical College to ask her to calculate the instantaneous speed, impact force and destructive power of “suspected brake wheel drum fragmentsâ€.
According to Associate Professor Wang, according to the bus speed of 94 km/h, and the minimum speed limit of large trucks with brake drum fragments falling on the opposite driveway, which is 70 km/h, the instantaneous speed of the iron sheet is estimated to be approximately 164 km/h, ie, high-speed flight per second. 45.6 meters is one tenth of the speed of a pistol bullet.
The windshield is 9mm thick and the iron pieces break through the glass in just 0.0002 seconds. The impact force is 4 times higher than the standard for the resistance of the windshield. Calculated according to the law of conservation of momentum, after breaking through the glass, the iron pieces also flew toward Wu Bin's abdomen at a speed of 30 m/s, generating an impulse of about 90 kg·m/s, equivalent to 2.5 kg of iron from 50 metres high. Falling and hitting Wu Bin's abdomen.
extend
Wu Bin was posthumously awarded the title of "Warrior"
"The most beautiful driver" we will always remember
According to Xinhua News Agency, Hangzhou, June 3rd, on the afternoon of the 3rd, Wu Bin was honored and honored by the Foundation of the Righteous Honor of Hangzhou City, and was posthumously awarded the title of “Hangzhou City as a Championâ€. The volunteers for the Foundation awarded the family members with an honorary certificate and a bonus of 200,000 yuan.
According to Jiang Jiansheng, Secretary General of the Hangzhou Municipal Courageous Foundation Foundation, Wu Bin is able to make these moves with the willpower of extraordinary people at critical moments of life. Successfully saving the lives of 24 passengers has already surpassed the responsibility of a driver and is a self-denial. Save the people and volunteer for the foundation to honor him in accordance with relevant regulations. Jiang Jiansheng also stated that the Foundation for Righteousness will always pay attention to the life of Wu Bin's family members, provide material protection and spiritual encouragement, and let the hero's family live in dignity.
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