Pass-type detector and coil structure thereof

Abstract

The invention discloses a pass-type detector which comprises a detector body and a first transmitting coil group, a second transmitting coil group, a receiving coil and a host which are installed on the detector shell, a security check channel is arranged in the middle of the detector shell, two transmitting coils of the first transmitting coil group are respectively arranged on two sides of the security check channel, two transmitting coils of the second transmitting coil group are respectively arranged on two sides of the security check channel, the first transmitting coil group and the second transmitting coil group are respectively connected with the receiving coil in an electromagnetic coupling mode, the first transmitting coil group, the second transmitting coil group and the receiving coil are electrically connected with the host, normal directions of current of the two transmitting coils of the first transmitting coil group are opposite at the same time, and normal directions of the current of the two transmitting coils of the second transmitting coil group are identical at the same time. By the arrangement, reliability in metal detection is greatly improved, leak judgment and error judgment of the pass-type detection are effectively avoided, and smooth operation of security work is guaranteed.

Description

technical field [0001] The invention relates to a coil structure of a through-type detector and the through-type detector, belonging to the technical field of detectors. Background technique [0002] In enterprises such as raw material smelters and metal processing plants, pass-through detectors are usually installed in order to prevent staff from taking high-value metal panels or plates such as copper or stainless steel out of the factory in violation of regulations. However, the test reliability of the pass-through detector in the prior art needs to be improved, and missed judgments often occur during use. [0003] In the pass-through detector, if the distribution of the magnetic force lines is basically along the horizontal direction. In this case, if the person under test is holding a copper or stainless steel metal panel, hidden in the belly belt buckle, through the pass-through detector. In the process of passing through the detector, the section of the metal panel i...

AI Technical Summary

Problems solved by technology

At this time, there may be misjudgment

On the other hand, on the top of the through-type detector, due to the relatively small distribution of magnetic induction lines, the generated eddy current signal will also be relatively weak, which will also cause missed judgments.

In the case of mobile phone detection, the mobile phone is often hidden under the belt buckle, which makes the pass-through detector miss the judgment

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