Shaofeng Dong

This study designed an image processing method that combines threshold segmentation and morphological segmentation to solve the problem of calculating the perforation area after laser perforation. It aims to solve the problem that the size of the perforation area is difficult to measure directly, the operation is complicated, and the measurement is inaccurate during the laser perforation process. Compared with traditional methods, this method can simplify the complex process of manually measuring the area of small irregular areas, and accurately extract and measure the area of irregular areas. Experimental results show that this method has high accuracy and reliability, and does not require direct contact with the measured object, avoiding possible physical contact errors and damage. In addition, this image processing technology can also be extended to similar fields such as process processing and laser cutting, providing strong technical support for related research and applications.

This paper reveals the quantized phase step phenomenon between every two cyclical signals and its characteristics. With these characteristics, ultra-high resolution phase difference measurement limited by the quantized phase step and its corresponding measurements can be achieved. The princple that the quantized phase steps between two radio frequencies are usually less than picosecond, femtosecond and even sub-femtoseconds, namely, the princple that the corresponding equivalent phase comparison frequency between two radio frequencies can enter into the microwave or light bands is also revealed, which provides a foundation for the precise link based on phase group processing between frequencies in different bands. In this paper, an ultra-high resolution phase difference measurement method based on the quantized phase step phenomenon and the phase coincidence detection is proposed. By introducing an intermediate frequency, this method utilizes the quantized phase step phenomenon between the measured frequency and the intermediate frequency to measure the phase difference. Highspeed A/D sampling and data processing are used to improve the phase coincidence detection accuracy.