Precision measurement method for flat crack and antenna crack

Abstract

The invention relates to an optical measuring device, especially relates to a precise method for measuring the slot of a planar slot antenna, and the device at least includes an image extracting device, a compute unit which processes the information provided by the image extracting device, which is characterized in that: A. initialization: 1) establishing a corresponding relationship between the digital picture pixel and the actual dimension; 2) extracting an image information from the planar slot antenna; 3) extracting a slot edge information of the image; 4) executing a sub-pixel process of the edge point; 5) storing sub-pixel edge points; B. real-time detection: 1) extracting an image information from the planar slot antenna at certain times; 2) extracting a slot edge information from the image information; 3) executing a sub-pixel process; 4) comparing with the corresponding edge point information stored in step four of the section A; 5) when less than the variation amount, repeating the step one of the section B; 6) when more than the variation amount, presenting a reminding information. The measurement can be carried out in working condition of the antenna, which does not affect use, and the measurement precision is high and the cost is low.

Description

technical field [0001] The invention relates to an optical measuring device, in particular to a method for precisely measuring the crack of a planar crack antenna. technical background [0002] The surface accuracy of the antenna panel is an important index to measure and evaluate the quality of the antenna. It not only directly affects the aperture efficiency of the antenna, thereby determining the shortest wavelength that the antenna can work, but also affects the main lobe width and side lobe structure of the antenna pattern. By measuring the surface of the antenna, its surface accuracy can be determined, and its influence on the electrical performance of the antenna can be deduced from the surface accuracy. The surface accuracy requirements of the reflective surface are related to the operating frequency. The higher the operating frequency, the stricter the surface accuracy requirements. Therefore, the requirements for measurement are more stringent. Whether there are ...

AI Technical Summary

Problems solved by technology

[0003] The original precision measurement of the panel generally uses a mechanical type such as a three-coordinate measuring machine, but its operation is complicated, it cannot be measured under working conditions, and the measurement speed is slow and the measurement is limited; the industrial measurement system method such as theodolite measurement system is used. The high-precision electronic theodolite is a sensor, combined with accessories and system software, to realize non-contact measurement of the measured object, which has the advantages of fast measurement speed and high precision, but it is not suitable for small-scale panel deformation and crack measurement, and it is expensive, and it is difficult to realize online For measurement, the requirements for the position of the antenna panel during measurement are relatively high; imagers such as the German Leitz imager are used, but due to poor special application functions of the imager, general image preprocessing and analysis can be performed, but in-depth special applications cannot be carried out analytics, and it's expensive

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