Glass coating wire detector

A technology of glass coating and testing instruments, applied in the direction of material magnetic variables, etc., can solve the problems of high production costs, achieve the effects of simplifying analog circuits, reducing signal-to-noise ratio, and ensuring robustness

Pending Publication Date: 2017-05-31
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
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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 strictl

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  • Glass coating wire detector
  • Glass coating wire detector

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[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like figure 1 As shown, the glass-coated wire detection instrument of the present invention includes: a processor system 1 , a signal integration circuit 2 , a main coil 3 , a secondary coil 4 , an amplifier 5 , a drive circuit 6 , and an indicator light 7 . There is only one primary and secondary coils respectively.

[0018] In this embodiment, the processor MCU (1) adopts a 32-bit, Cortex-M3 processor, which has an instruction execution capability of 150 DMIPS and an AD converter with a rate of 6Msps. The processor MCU (1) generates a sinusoidal signal with a fixed frequency (200HZ) and a fixed amplitude (2.5V). The function of this signal is to make the disturbance effect of the glass-coated wire on the magnetic field, which can be intuitively reflected through the sinusoidal carrier wave.

[0019] The sine signal is converted into a ladder-t...

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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...

Claims

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Application Information

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IPC IPC(8): G01N27/72
CPCG01N27/72
Inventor 徐峰李旦潘峰
Owner FUDAN UNIV
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