Capacitive threaded steel wire diameter on-line measurement system

Abstract

The invention discloses a capacitive threaded steel wire diameter on-line measurement system and a detection method thereof, and belongs to the technical field of threaded steel wire diameter on-line measurement. A cylindrical piece is in a hollow tubular structure with openings on both ends, threaded steel penetrates through the central axis of the cylindrical piece, and a first capacitance pole is led out from the end part of one end of the cylindrical piece; a collector ring is arranged at the outlet of a rolling mill and is contacted with the threaded steel; a second capacitance pole is led out from the collector ring, and the cylindrical piece and the threaded steel form a cylindrical capacitor; the first and the second capacitance poles are connected into a capacitance measuring module; and the capacitance measuring module is sequentially connected with a filter module, a data operation module and a data display module. According to the detection method, the diameter and the amount of deviation of the threaded steel to be measured are obtained by establishing a standard database, local linearization and deviation estimation operation. Compared with a laser scanning method, a photoelectric photographic method and other technologies, the detection method provided by the the invention has the advantages that the structure is simple, the cost is low, and the high-precision on-line measurement of the diameter of the threaded steel is easy to realize.

Description

technical field [0001] The invention relates to the technical field of on-line diameter measurement of threaded steel, more specifically, to a capacitive on-line measurement system for threaded steel diameter and a detection method thereof. Background technique [0002] At present, in my country's metallurgical industry, most rebar production plants still use calipers to measure the rebar in a hot state after the rebar is rolled off-line. This method is randomly selected for measurement, and its measurement accuracy is not high. Slow, labor-intensive, and cannot be detected in real time, and cannot be adjusted and replaced in a timely manner. Once an out-of-tolerance is found, a large number of steel products have become defective or scrap, and downtime also seriously affects the improvement of production efficiency. With the continuous improvement of bar rolling technology, offline measurement of wire diameter has long been unable to meet industrial needs. At the same time,...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art on-line diameter measuring equipment for threaded steel, such as complex structure, high requirements for diameter measurement, and high cost of diameter measurement, and provide a capacitive online diameter measurement system for threaded steel and its detection method. The capacitive on-line measurement system constructed by the present invention can realize high-precision on-line measurement of the wire diameter of the rebar, thereby improving the yield of the rebar, and has a simple structure and low equipment maintenance cost

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