Glass coating wire detector

Abstract

The invention belongs to the technical field of signal detection and particularly relates to a detector for detecting a glass coating wire. The detector mainly consists of a processor, a primary coil, a secondary coil, a signal conditioning circuit, an AD converter, a drive circuit, an indicating lamp, etc. The processor generates an excitation signal, and the primary coil is driven by the drive circuit to generate a magnetic field. The approaching glass coating wire causes disturbance to the magnetic field, and the waveform received by the secondary coil generates tiny sharp pulse. The signal conditioning circuit amplifies and filters the signal which is then acquired to the processor by the AD converter. The processor processes the waveform by a signal processing method and judges the disturbance signal to realize detection of the glass coating wire. The detector and the glass coating wire are applied to the fields such as commodity anti-counterfeit labels.

Description

technical field [0001] The invention belongs to the technical field of signal detection, and in particular relates to a detector for detecting glass-coated wires. Background technique [0002] Glass-coated wire is a newly developed material in recent years, and its main component is CoFeSiBCr. This glass-clad wire has a special property of fast magnetic switching in the longitudinal magnetization. For such nanocrystalline microfilaments with magnetic anisotropy, the longitudinal residual tensile stress dominates over other tensors. Magnetostriction of the positive and negative poles results in radial and circumferential magnetization of the surroundings, respectively, whereas the inner core is always longitudinally magnetized, and the longitudinal magnetization of the inner core accounts for only a small fraction of the negative magnetization of the microwire. In contrast, in the positive magnetization of microfilaments, the longitudinal magnetization will dominate. [00...

AI Technical Summary

Problems solved by technology

The detection algorithm used in this method is relatively simple. However, this method requires that the differential coil pair must be strictly consistent, which puts forward high requirements on the coil manufacturing process, requires manual adjustment, and has high production costs.

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