Device for detecting needle wear degree and detecting method employing same

Abstract

The invention relates to a device for detecting needle wear degree and a detecting method employing the detecting device. The device comprises a needle machine needle plate, a resistance element for applying current to a load, an electrical signal reading element for reading the current, an electrical signal conversion element for converting an electrical signal into a digital signal, a central controller for comparing the value of the digital signal with a set threshold and a result display element for displaying the wear level of the needles, wherein all parts are sequentially connected by awire. The method comprises that the current generated by friction between the needle on a non-woven fabric production apparatus and fibers is transmitted to the electric signal reading element by a single electrode and the resistance element to obtain an electrical signal, then the electrical signal is transmitted to the electrical signal conversion component to obtain a digital signal, the digital signal is transmitted to the central controller, and the central controller processes the digital signal and then outputs the same to the display element. The device and the method solve the problem that the degree of wear of the needles is difficult to measure on line, and realize real-time control on the needling process.

Description

technical field [0001] The invention belongs to the field of non-woven fabric production, and relates to a detection device for the degree of wear of a puncture needle and a detection method using the detection device. Background technique [0002] In the fiber web formed on the spunbond and meltblown nonwoven production lines, the fibers are mainly overlapped with each other in the plane, and the bonding force between each other in the vertical direction is very low, and it can hardly withstand external forces from any direction. It does not have practical application value, so an appropriate fiber consolidation process must be used to strengthen the connection between fibers, so that the fiber web becomes a non-woven fabric with certain longitudinal and transverse strength. Among them, acupuncture reinforcement is one of the commonly used fiber web consolidation methods. The needle board of the acupuncture machine is equipped with a lot of barbed needles with triangular s...

AI Technical Summary

Problems solved by technology

There will be friction when the acupuncture and the fibers move relative to each other, and the friction will generate electric charges. It is relatively simple to determine the degree of wear of the needle by collecting electrical signals to characterize the friction force, and there is no need to adjust the equipment to a large extent. However, the existing technology does not There is no report on detecting the degree of needle wear using the principle of triboelectric power generation. Most of them calculate or judge the degree of needle wear by directly measuring the needle force. For example, the patent document ZL02811338. The instantaneous force during the netting period, and calculate the acupuncture force or penetration energy based on this instantaneous force

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