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Magnetic insertion control circuit suitable for hard label machine and control method thereof

A technology for controlling circuits and hard tags, applied to record carriers used in machines, instruments, computer components, etc., can solve the principle error of the three-coil sensing technology in detecting the resonant frequency, the cumbersome assembly and debugging of the three-coil probe structure, and the zero adjustment. The magnetic insertion control method is complicated, etc., to achieve the effect of convenient installation and debugging, elimination of frequency offset, and simple design structure

Pending Publication Date: 2020-06-05
绍兴职业技术学院
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  • Abstract
  • Description
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Problems solved by technology

However, there are still some deficiencies in these three patented technologies. First, the assembly, debugging, and zero adjustment of the three-coil probe structure are cumbersome. Second, there are principle errors in the detection of resonant frequency by the three-coil sensing technology. The magnetic control method is complex and the control accuracy is not high

Method used

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  • Magnetic insertion control circuit suitable for hard label machine and control method thereof
  • Magnetic insertion control circuit suitable for hard label machine and control method thereof
  • Magnetic insertion control circuit suitable for hard label machine and control method thereof

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Embodiment Construction

[0038] Such as figure 1 , figure 2 As shown, a magnetic insertion control circuit suitable for hard label machines of the present invention includes: an excitation signal source module, a precision resistor R 1 , compensation capacitor unit, single coil sensitive probe, signal processing module, control unit;

[0039] The excitation signal source module is used to generate the resonant frequency F that the frequency needs to be tuned for the hard tag 0 AC excitation signal;

[0040] The compensation capacitor unit includes a fixed capacitor C 0 and adjustable capacitor C X , the fixed capacitance C 0 and adjustable capacitor C X parallel connection;

[0041] The precision resistor R 1 The first end of is connected to the output signal end of the excitation signal source module, and the fixed capacitor C 0 and adjustable capacitor C X After paralleling the first terminal with the precision resistor R 1 connected to the second terminal, the fixed capacitor C 0 and a...

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Abstract

The invention discloses a magnetic insertion control circuit suitable for a hard label machine and a control method thereof. The control circuit comprises an excitation signal source module, a precision resistor R1, a compensation capacitor unit, a single-coil sensitive probe, a signal processing module and a control unit. The single-coil probe is simple in design structure and convenient to install and debug, and the problem of frequency deviation of a traditional single-coil detection circuit is effectively solved by adopting the design of the compensation capacitor unit. In the process of controlling the magnetic rod to be inserted, when the control unit detects that the digital quantity signal of the AD conversion unit is minimum, the magnetic rod can be stopped being pressed in, the control method is simple, and the circuit and the control method thereof provide technical support for full-automatic production of hard labels.

Description

Technical field: [0001] The invention belongs to the technical field of production and processing of commodity anti-theft hard tags, and in particular relates to a magnetic insertion control circuit suitable for hard tag machines and a control method thereof. Background technique: [0002] In the Electronic Article Surveillance System (EAS), electronic anti-theft tags can be divided into two categories: soft tags and hard tags according to different structures. kind. EAS can be divided into radio frequency system (4.75MHz / 8.2MHz / 10MHz) and acoustomagnetic system (58KHz) according to different operating frequencies. [0003] The internal structure of the electronic tag is mainly an RLC oscillating circuit. One of the criteria for judging whether a tag is qualified is to see whether the tag resonates within the resonant frequency range. At present, in the hard tag production process, the adjustment of the resonant frequency of the hard tag is to insert the magnetic rod into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/067G06K19/07
CPCG06K19/0672G06K19/07
Inventor 盛庆元边小续马方毅王炳楠王蒙恩
Owner 绍兴职业技术学院
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