| This task aims at the insulated chipboard product line of LiaoYang Industry Cardboard Corporation. Its purpose is to detect the metal eyewinkers in the insulated chipboard. This task has established item in LiaoYang Technology Committee. The whole thesis includes the hardware design and the software design.Insulated chipboard is mostly used to make transformers. If there are metal eyewinkers in it,the insulated performance will be influenced seriously. The design of the metal detector adapts electric whirlpool sensor,and the signal disposal circuit converts the frequency signals to the voltage signals ,afterwards by A/D conversion the voltage signals are transformed to the digital signals which can be managed by the industrial computer. This system is based on the industrial control computer,adapts the ISA and PCI bus standard,integrate CPU,display card,data acquisition card,I/O interface card,etc,and it has the functions of exact coordinate orientation,automatic alarming,automatic noting,making signs on the metal part by the signing equipment. This equipment can detect the metal eyewinkers abeve 0.5mm,1mg on line at the speed of 25-40 meters per minute,and have rather strong ability of anti-jamming.The thesis uses Microsoft Visual Basic 6.0 as development tool in Windows 95/98 circumstance to finish acquiring data,estimate metal eyewinkers(yes,no),store testing data to database and other functions. The software system has a friendly and direct man-machine interactive interface,simple manipulation,and meets the need of fieldwork,and it makes full use of the advancement and easiness of Windows95/98 operating system,adapts multithread and multitask working,unifies the circulation of every function module.The test run examine of the system indicates the exploiture of this thesis is successful,the precept of software and hardware is reasonable. The thesis presents the system parameter configuration,the dynamic curve and the coordinate orientation of metal position.
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