基于电容补偿技术的硬标签调频系统设计与试验

Design and Test of Hard Label Frequency Modulation System Based on Capacitance Compensation Technology

针对目前硬标签谐振频率检测技术用于硬标签插磁调频生产存在的不足,提出一种基于电容补偿原理的单线圈敏感硬标签谐振频率传感技术。采用Multisim软件,对此技术的电路模型仿真表明,在互感系数不变的条件下,信号幅值比极值点与硬标签工作频率点一致。在双路硬标签插磁调频装置上,采用此技术的信号幅值比为反馈信号,结合设有阈值的模糊控制策略,以MSP430F149处理器为核心研制一套硬标签插磁控制系统。以生产58 kHz声磁硬标签进行试验,测试数据表明,该套控制系统对硬标签谐振频率的控制精度在±80 Hz内,生产效率为1300个/h,系统运行稳定。该系统为硬标签产品的质量提供了技术支持。

In view of the shortcomings of the current hard tag resonant frequency detection technology used in the hard tag insertion frequency modulation production,a single coil sensitive hard tag resonant frequency sensing technology based on the principle of capacitance compensation is proposed.Using Multisim software,the circuit model simulation of this technology shows that under the condition of constant mutual inductance coefficient,the extreme value of signal amplitude ratio is consistent with the working frequency point of hard tag.In the dual channel hard tag insertion magnetic frequency modulation device,the signal amplitude ratio of this technology is used as the feedback signal,combined with the fuzzy control strategy with threshold value,and the MSP430F149 processor is taken as the core to develop a set of hard tag magnetic insertion control system.The test is carried out by producing 58 kHz acoustic magnetic hard labels.The test results show that the control accuracy of the control system to the resonant frequency of the hard tag is within±80 Hz,the production efficiency is 1300 units/hour,and the system runs stably.This system provides technical support for the quality of hard label products.