In recent years, the manufacturing industry represented by the automobile industry has developed rapidly in China. As an important part of the transmission system in the manufacturing industry, the manufacturing technology of spur gear has also been greatly improved. One of the overall development strategies of China’s manufacturing industry is to develop China into a global manufacturing and supply base of industrial spur gears, which has also been recognized by most domestic spur gear manufacturers. The recovery of equipment manufacturing industry, the rise of aerospace supply, the rapid development of the industry and the prosperity of shipbuilding not only put forward higher requirements for spur gear manufacturing industry, but also provide unprecedented opportunities.
Nowadays, whether state-owned enterprises or private enterprises, on the one hand, we are expanding the types and output of spur gears that can be produced, on the other hand, we are paying more attention to improving the manufacturing quality of spur gears. Therefore, a large number of enterprises have made a lot of investment in the transformation and upgrading of technology, such as innovating technology, purchasing equipment, introducing technology and strengthening information management; At the same time, enterprises pay more attention to the monitoring and testing technology in the whole manufacturing process of spur gears, and list it as an important link to ensure the production quality of spur gears. In order to improve the quality of China’s spur gear and improve the market share of domestic spur gear measuring instruments, we must develop measurement technology with independent intellectual property rights.
Generally, the measurement methods of various parameters of spur gears can be divided into contact measurement and non-contact measurement. Most of the traditional measurement methods of involute profile error belong to contact measurement, which is difficult to realize the in-situ measurement of spur gear. If the structured light vision measurement technology can be applied to the measurement of spur gear parameters, it will have many advantages: it is easy to integrate and manage information and realize intelligent detection; The speed is fast, and the measurement process can be scanned quickly without measuring point by point; It can be used for long-time measurement under harsh conditions or when contact measurement cannot be carried out; It can directly measure soft objects, thin-walled objects and high-precision parts.
At present, the measurement objects of structured light vision technology are mostly the three-dimensional dimensions of large free-form surfaces. This application does not require high measurement accuracy of structured light vision technology. In the field of mechanical industry, spur gear is one of the most widely used parts. The accuracy of three-dimensional solid measurement of spur gear surface is higher. The previous methods either can not achieve high measurement accuracy, or the cost is high. Therefore, these methods are more or less limited in practical application.