The hottest smart bolt unscrewed billions of yuan

Intelligent bolts "screw" open the civil market of billions of yuan

Abstract: Recently, the intelligent bolt developed by a post-80s engineer of Shenyang Aircraft Design and Research Institute of aviation industry has attracted great attention at home and abroad. This invention can monitor the load of the bolt in real time. Domestic mines may be strong and in good condition, providing a "safety lock" for the safety of equipment (Engineering)

bolts are widely used in machinery, electronics, electric power, vehicles, ships, aviation, construction and other industries. The bolts are small and have large energy. The loosening of bolts in key parts may cause aircraft crashes, plant collapse, and the fracture of the beam of the microcomputer controlled electro-hydraulic servo universal experimental machine produced by Shandong Sida high tech... the losses are incalculable. Recently, the intelligent bolt developed by a post-80s engineer of Shenyang Aircraft Design and Research Institute of aviation industry has attracted great attention at home and abroad. This invention can monitor the device load and state of the bolt load change times in real time, and provides a "safety lock" for the safety of equipment (Engineering)

on December 5, Wang Jianzhi, the inventor of intelligent bolt, was interviewed. He graduated from Nanjing University of Aeronautics and Astronautics and is a senior engineer in the comprehensive strength Department of Shenyang Aircraft Design and Research Institute. Now, he has another identity, the technical director of Shenyang Zhihang Intelligent System Co., Ltd., a private enterprise invested by social capital and responsible for the transformation of the military "black technology" market

the smart bolt placed in the laboratory looks uncomplicated. There is a 1mm small hole on the bolt, and the small optical fiber and grating sensors are hidden in the hole, and the outgoing optical fiber is connected to the monitoring instrument. "With the sensor function added to the ordinary bolt, the bolt can actively sense the load force, monitor its own state in real time, and give an early warning once there are signs of loosening and fracture."

the aircraft body is composed of many parts, and many bolts are required at the splicing part. During long-term flight, the connecting bolts at key parts cannot bear the load or reach the "metal fatigue period", and the bolts will have problems or even break, directly endangering the safety of the whole aircraft. In recent years, how to accurately measure the bolt load is a hot and difficult point in the industry. Some people try to install ultrasonic sensors outside the bolts. Due to the limitations of environment, conditions and other factors, it is difficult to obtain accurate data of internal forces, which is not widely used

"the optical fiber of the sensor is slender, and the bolt is axially slender, so I wonder if I can put the optical fiber into the bolt." Driven by this idea, Wang Jianzhi and his team explored for five years, successfully mastered the key technologies such as deep hole processing of high-strength bolts, fiber Bragg grating surface treatment, sensor packaging design, and sensor signal processing and recognition in strong noise environment, and developed intelligent bolt prototype products of various materials. After laboratory and aircraft tests, the bolt load error measured by intelligent bolts is plus or minus 1%, It is suitable for high-precision measurement

"derived from the army and integrated into the people." Smart bolts are not only widely used in landfills all over the world, but also widely used in military products. The civil market has a broader prospect. The market demand of domestic power, shipbuilding, construction, high-speed rail and other industries alone has reached 2.5 billion yuan. After active docking in Huanggu District of Shenyang, Shenyang Aircraft Design and research institute took the intelligent bolt as the first military civilian integration pilot project, and authorized the invention patent to Shenyang Zhihang Intelligent System Co., Ltd. to be responsible for the market transformation of the military "black technology"

it is revealed that the first batch of smart bolts customized for customers by Shenyang Zhihang Intelligent System Co., Ltd. has been produced and will be installed on a ship and high-speed railway bridge in the near future. A military "black technology" produced in the laboratory will benefit the whole society. Following this path, under the background of the country's vigorous implementation of the development of military civilian integration, more and more military technology associations of Shenyang Aircraft Design and Research Institute have gradually achieved civilian use