[Explanation] Railway transportation is one of the main modes of transportation and travel in China. The safe operation of trains is related to the safety of people's lives and property, and the steel rails are called the "legs" of trains, which are subjected to daily The load and impact of the wheel, whether its state is healthy or not, is directly related to the safe and smooth operation of the train.
On February 24, in a science park in Hefei, Anhui Province, Zhang Han, the "B-ultrasound doctor" of the rails, was busy with his work.
[Concurrent] Zhang Han, developer of rail ultrasonic flaw detector
Then, during the long-term use of the rail, due to this fatigue and damage, there will be crack growth in it. After the crack grows to a certain stage, it will cause the rail to break.
Once the rail breaks, it will cause the derailment of the train. If the train derails, it is a very big safety accident, which may lead to casualties and property losses. Therefore, it is said (rail inspection) to maintain railway safety. , a very important technique.
[Explanation] It is understood that most of China's rail flaw detection equipment uses hand-push flaw detection equipment, which not only consumes manpower and material resources, but also has low work efficiency.
In order to achieve fast and efficient rail flaw detection, Zhang Han has continuously developed, improved, and repeatedly tested for three years. Using three-dimensional simulation design software, according to the physical properties of ultrasonic waves and the acoustic properties of the medium, it simulates the propagation of ultrasonic waves in the wheels and the propagation of ultrasonic waves in the rails. spread.
Finally ushered in the only ultrasonic wheel probe with independent intellectual property rights in China.
[Concurrent] Zhang Han, developer of rail ultrasonic flaw detector
At present, our product is used in 18 railway bureaus in (China). We have a product called double-track ultrasonic flaw detector. We have sold more than 300 units now. The price of our product is about 100 10,000 (RMB) per unit, so in general, we have an output value of about 300 million.
[Explanation] Zhanghan's road to entrepreneurship and innovation is very difficult. Starting from an office of 50 square meters, in the past 14 years, the company has grown from three people at the beginning to more than 70 people today, and developed a dual-track rail ultrasonic flaw detector. , which fills the technological gap in China in this field, and the products are exported to South Korea, Indonesia, Canada and other countries.
[Concurrent] Zhang Han, developer of rail ultrasonic flaw detector
If we make a product, in fact, there is no domestic product, so in this process, the research and development process is actually very hard.
When the product was first developed, people didn't necessarily think that the product was so good, so the process was very long, and then there might be a lack of funds and personnel changes.
But we also insisted, and then there was an opportunity. When an opportunity came, we seized this opportunity and launched this product to the market.
[Commentary] "There are more and more 'Keqiao' and 'Xinqiao' who choose to come back." Zhang Han said about the changes in the past ten years. At present, China is in a stage of rapid development, and it can be a "Keqiao". "Xinqiao" provides a good platform for development, and also provides a stage for them to realize their self-worth.
[Concurrent] Zhang Han, developer of rail ultrasonic flaw detector
I think it is still an economic development, and the demand for this technology has provided a broader stage for everyone.
Moreover, our country (China) is still vigorously developing its infrastructure, so the development of infrastructure will bring demand from all walks of life, so that means there is still a lot of room for development, including our (China) domestic and There is a lot of demand in this area of urbanization, so it will bring us a lot of business opportunities for returned overseas Chinese and overseas Chinese.
[Explanation] At present, Zhang Han leads the team to continue to innovate, and is actively developing unmanned flaw detectors and electromagnetic ultrasonic flaw detectors, completely replacing labor through artificial intelligence, breaking the traditional flaw detection concept, and creating a "railway flaw detection robot" belonging to China. China's vast railways ensure safe train transportation.
Liu Honghe Chu Weiwei reports from Hefei, Anhui
Responsible editor: [Li Yuxin]