针对汽车玻璃黑边区域划痕的自动检测需求,以汽车角窗玻璃为对象,进行划痕视觉检测方法的研究.首先采用灰度值拉伸来凸显划痕,通过维纳滤波降噪和LaP1acian算子的锐化加强划痕细节,然后利用区域生长分割法进行玻璃黑边区域分割,采用形态学方法实现灰尘等干扰信息的去除以及断裂划痕的连接,最后用8领域连通区域标记法进行划痕的识别和标记.测试结果表明,该算法适用于不同型号的汽车玻璃黑边区域划痕的检测,检测的准确率达到99％,划痕标记的准确率达到97％,检测速度快,符合在线检测的要求.
As the basic of internet of things, the security problems of RFID system have attracted great attention of people. According to the architecture and principle of RFID system, the paper analyzes security problems of RFID system in detail and puts forward countermeasures for RFID system security.
Based on features of radio frequency identification(RFID),the paper puts forward a model of the access control system appling radio frequency identification,and introduces the realization of the software and the hardware of the system.The accuracy of identify is high,the anti-interference ability is strong,and the correspondence is reliable.
The paper introduces a kind of design and implementation of software and hardware of multiple functions wave generator that takes FPGA as the core primarily and applys VHDL.The system can produce sine wave,triangle wave,square wave,can output a signal which line combination wave of two or three kinds of that in editing.The waves can be carried on the adjustment of range and frequency.
介绍了利用AT89C51单片机控制的超声波测距系统的原理。给出了系统构成,并在数据处理中采用了温度补偿修正。此系统具有易控制、工作可靠、测量精度高的优点,可实时监控液位。
This article includes a system of temperature control of heating furnace based on PLC and Configuration Software. The system adopts a principal and subordinate control system which was formed with PC and PLC. KingView supervisory combination software is used in the design, and KingView’s dynamic database can connect well with siemens PLC by hotlink to form a temperature controlling system.
