Control circuit of digital type metal detector

Abstract

The invention relates to a control circuit for a digital metal detector, which comprises a digital signal processor (DSP), an FPGA, a touch sensitive display, an A / D converter, first other equipment and second other equipment; the digital signal processor (DSP) is respectively connected with the FPGA and the first other equipment; the FPGA is respectively connected with the touch sensitive display, the second other equipment and the A / D converter; more complicated system algorithms can be developed on the system, such as the self-learning algorithm and the automatic balancing algorithm of a metal detector, and a digital module of extremely high integration level can also be controlled, thereby greatly simplifying the circuit structure of the metal detector, reducing the usage of analogous circuits to the maximum extent and fundamentally overcoming the defects resulting from the heavy use of the analogous circuits, promoting the stability, intelligence, maneuverability and extendibility of the metal detector, greatly promoting the cost performance of the metal detector and causing the metal detector to have more powerful market competitiveness.

Description

technical field [0001] The invention relates to a metal detector used in industry, in particular to a control circuit of the metal detector. Background technique [0002] Metal detector is a kind of occasion that can be used in all occasions that need to detect metal foreign objects, such as food, medicine, seasoning, food additives, clothing, toys, plastics, rubber, cosmetics and paper products and other production lines. [0003] The early metal detectors were analog systems. With the continuous development of digital technology, a digital metal detector equipped with a small number of digital circuits to control was born. [0004] However, this kind of digital metal detector basically adopts an analog circuit structure, but the output part sends the output value to the microprocessor for judgment through the A / D converter, and at the same time increases the man-machine dialogue function. [0005] Depend on figure 1 Visible: U.S. Patent No.: 5,786,696, title of invention...

AI Technical Summary

Problems solved by technology

This patent uses DSP to work online with a single-chip microcomputer. Due to the limitation of the processing capacity and processing speed of the single-chip microcomputer, the display rate of the system is low, and complex display content cannot be realized. Due to the limitation of the input and output ports of the single-chip microcomputer, the system can only complete limited control. Function, failed to effectively use the speed advantage of DSP processor, multi-thread multi-tasking processing function

Images