TW340908B - The non-obtrusive weapon detection system - Google Patents

The non-obtrusive weapon detection system

Info

Publication number
TW340908B
TW340908B TW085110771A TW85110771A TW340908B TW 340908 B TW340908 B TW 340908B TW 085110771 A TW085110771 A TW 085110771A TW 85110771 A TW85110771 A TW 85110771A TW 340908 B TW340908 B TW 340908B
Authority
TW
Taiwan
Prior art keywords
metal objects
eddy current
weapon
magnetic field
time constant
Prior art date
Application number
TW085110771A
Other languages
Chinese (zh)
Inventor
Wenn-Yih Hwang
Original Assignee
Wenn-Yih Hwang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wenn-Yih Hwang filed Critical Wenn-Yih Hwang
Priority to TW085110771A priority Critical patent/TW340908B/en
Application granted granted Critical
Publication of TW340908B publication Critical patent/TW340908B/en

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  • Geophysics And Detection Of Objects (AREA)

Abstract

A non-obtrusive weapon detection system, it is used to detect and identify the hidden weapon and other metal objects, and includes:  Emitter, it can be a magnetic field generator, for emitting low intensity electromagnetic step pulse, to flow eddy current into observed metal objects. This eddy current can generate a scattering signal, which has decay curve due to the delay of eddy current;  Receiver, is used for detecting scattering signal generated by eddy current, and can be a rapidly responding magnetic field sensor, and also can be plural rapidly responding magnetic field sensor groups;  Data processing and calculating tools; When data processing and calculating tools are connected with emitter and receiver for processing information, the time constant is used to define the decay curve. A suitable mathematics equation will be used to compare time constant of decay curve from observed metal objects with similar value of time constant from other metal objects contained in database. It can provide the conductivity, size and shape of that object, and to know the substance of metal objects in advance. Therefore, the observer can identify that is a threatening weapon or non-threatening metal objects.
TW085110771A 1996-09-03 1996-09-03 The non-obtrusive weapon detection system TW340908B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW085110771A TW340908B (en) 1996-09-03 1996-09-03 The non-obtrusive weapon detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW085110771A TW340908B (en) 1996-09-03 1996-09-03 The non-obtrusive weapon detection system

Publications (1)

Publication Number Publication Date
TW340908B true TW340908B (en) 1998-09-21

Family

ID=58263469

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085110771A TW340908B (en) 1996-09-03 1996-09-03 The non-obtrusive weapon detection system

Country Status (1)

Country Link
TW (1) TW340908B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2608405A (en) 2021-06-30 2023-01-04 Security Screening Tech Limited Improved detection of conductive material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2608405A (en) 2021-06-30 2023-01-04 Security Screening Tech Limited Improved detection of conductive material
WO2023275541A1 (en) 2021-06-30 2023-01-05 Security Screening Technologies Limited Improved detection of conductive material

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