A metal detection door with parameter automatic setting function

Abstract

The invention relates to a metal detecting door with a parameter automatic setting function. The metal detecting door with the parameter automatic setting function comprises a launching coil, a receiving coil, a detecting signal process circuit and a man-machine interaction module, wherein the detecting signal process signal comprises a digital signal processor (DSP), a field programmable gate array (FPGA) module, a direct / alternating (D / A) module, an alternating / direct (A / D) module, a filtering amplifying module and a multiplying unit, the receiving coil, the multiplying unit, the filtering amplifying module, the A / D module and the FPGA module are successively connected with each other, the FPGA module is respectively connected with the launching coil and the multiplying unit through the D / A module, and the DSP is respectively connected with the man-machine interaction module, the FPGA module and the filtering amplifying module. Compared with the prior art, the metal detecting door with the parameter automatic setting function automatically sets the signal parameters of the phase position, the signal gain and the like of a carrier signal or a launching signal, reduces the influence to accuracy of detection due to setting manually, and is convenient to use.

Description

technical field [0001] The invention relates to a metal detection door, in particular to a metal detection door with a parameter automatic setting function. Background technique [0002] The metal detection gate is a kind of detection device for detecting whether pedestrians carry metal articles, also known as the security gate. Metal detection security gates are mainly used in airports, stations, large conferences and other public places with a large flow of people to check hidden metal objects on people's bodies. [0003] Metal safety detection doors have entered the digital age, using many of today's advanced technologies, and their performance is getting better and better, but they are still in the process of continuous development and improvement. [0004] There are at least three defects in the current metal detection gates in use: the first, the parameter setting of the metal detection gates is all carried out manually, as the patent application number 201020157587.4...

AI Technical Summary

Problems solved by technology

[0004] There are at least three defects in the current metal detection gates in use: the first, the parameter setting of the metal detection gates is all carried out manually, as the patent application number 201020157587.4: metal detection gate, the metal detection gate The parameter adjustment method used in is manually set by the operator

In fact, this method greatly reduces the intelligence of the metal detection door, and because the adjustment of this parameter is often only a few professionals know how to operate, which causes great inconvenience to non-professionals to use the metal detection door. This also reduces the convenience of metal detection doors

Second, although the latest metal detection gates have achieved partition detection, they have not been further subdivided according to the different characteristics of each area, resulting in alarms for normal items containing metal such as belts. At this time, staff are required to conduct time-consuming inspections search, increased workload

Third, the existing metal detection gate, such as the patent application number: 02293547.9 digital metal detection gate, its signal generation is formed by a square wave generating circuit and a sine wave conversion circuit or by adding a DDS hardware circuit, which greatly increases the number of hardware. and the signal quality it produces is not high

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