EP1611460A2 - Systems and methods for a portable walk-through metal detector - Google Patents
Systems and methods for a portable walk-through metal detectorInfo
- Publication number
- EP1611460A2 EP1611460A2 EP04750755A EP04750755A EP1611460A2 EP 1611460 A2 EP1611460 A2 EP 1611460A2 EP 04750755 A EP04750755 A EP 04750755A EP 04750755 A EP04750755 A EP 04750755A EP 1611460 A2 EP1611460 A2 EP 1611460A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- accordance
- metal detector
- electrically coupled
- circuit
- sensor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
Definitions
- the present invention relates generally to walk through metal detectors for security applications and more specifically it relates to a portable walk through metal detector and method with interchangeable sensor panels and other structural members that can be quickly assembled, or disassembled and transported.
- Walk through metal detectors have been in use for years. Typically, walk through metal detectors are comprised of metal detectors used in the pursuit of discovering metal objects carried by persons attempting to gain access to a specific area. These devices are even more important given today's security conscious climate. [0006] The main problem with conventional walk through metal detectors is that they are heavy and difficult to move to various locations. Another problem with conventional walk through metal detectors is that they require additional equipment to make them mobile. Another problem with conventional walk through metal detectors is the power consumption of the electronic system limits the detectors ability to operate from a battery source for more than a few hours, requiring AC power to be accessible for either operation, or frequent battery recharging.
- the present invention provides a new walk through metal detector with portable construction wherein the same may be utilized for rapid assembly, or disassembly and transport. Additionally, the present invention provides a detection system that operates for a relatively long period of time without the necessity of battery recharge or an available AC power source by providing a load duty circle, transmit pulse circuit for a portable walk through metal detector that provides an energy efficient detection system.
- the general purpose of the present invention is to provide a new walk through metal detector with portable construction that has many of the advantages of the walk through metal detectors mentioned heretofore and many novel features that result in a new portable walk through metal detector with portable construction which is not anticipated, rendered obvious, suggested, or even implied by any of the prior art walk through metal detectors, either alone or in any combination thereof.
- the present invention broadly provides modular walk-through metal detector comprising a plurality of separate sensor panels electrically coupled to each other and arranged one above the other along two separate sides to form two side walls and a top cross-member that engages each side wall.
- at least one base member is provided that is coupled to the sidewalls.
- the present invention comprises two structural base members to anchor an archway comprised of two sidewalls, multiple sensor panels with which the sidewalls of the archway are constructed, and a top cross-member to join and support the walls of the archway.
- the base members consist of a housing to provide contact with the ground, mechanical hardware and fittings to facilitate mounting of the sensor panels, rechargeable batteries to provide the system power source, and electronic connectors to pass signals from the base section to adjacent sensor panels.
- the sensor panels consist of a housing to provide structure for the sensor coils and electronics, mechanical hardware and fittings to facilitate mounting of adjacent panels and/or other structural members, sensor coil windings, electronic circuits to provide the coil excitation or to process the received signals, multi-color LED target indicators, pairs of infrared emitting and photo diodes to detect the presence and speed of persons passing through the detector archway, and electronic connectors to pass signals from the sensor panel to adjacent sections.
- the top cross-member consists of a housing to join and support the walls of the archway, mechanical hardware and fittings to facilitate mounting of the sensor panels, electronic circuits to provide the master processing of the metal detection system, input and output devices to provide the user with an interface for control and informational display, and electronic connectors to pass signals from the top section to adjacent sensor panels.
- the top cross-member provides a vehicle platform for moving a disassembled unit with built-in wheels, a handle, and stacking structures to support the other members.
- the portable walk through metal detector includes interchangeable sensor panels, not restricted by assembly position.
- the position of each interchangeable sensor panel is automatically identified by the main system processor.
- the portable walk through metal detector includes multi-color LEDs for each detection zone that indicates target presence and relative size.
- the sensor panels have windowed areas to reduce weight, reduce wind resistance, and provide visibility into the walk through archway.
- the metal detector is in a weatherproof package that facilitates outdoor use.
- the portable walk through metal detector operates from an optional solar power system, allowing continuous outdoor usage.
- the present invention also provides a metal detection circuit that includes a power source. At least one transmitter circuit is electrically coupled to the power source while a transmit coil is electrically coupled to the transmitter circuit. At least one receiver coil is provided along with an amplifier to be electrically coupled to the receiver coil. An integrator is electrically coupled to the amplifier and a track/hold circuit is electrically coupled to the integrator. A filter is electrically coupled to the track/hold circuit and an output.
- the filter is a bandpass filter.
- the transmitter circuit comprises a charged coil circuit.
- the circuit comprises two receiver coils each electrically coupled to the amplifier.
- the track/hold circuit comprises a first stage comprising an input resistor, an op-amp, an integrator capacitor, and a C-Mos SPDT switch, and a second stage comprising two passive RC filters and an op-amp buffer.
- the present invention provides a modular walk-through metal detector comprising a plurality of separate sensor panels electrically coupled to each other and arranged one above the other along two separate sides to form two side walls and a top cross- member that engages each side wall.
- at least one base member is provided that is coupled to the sidewalls.
- Each sensor panel includes a portion of a metal detection circuit as described above, i.e., some of the panels include a transmitter portion of the circuit while other panels include a receiver portion of the circuit.
- one sidewall is made up of transmitter panels while the other sidewall is made up of receiver or detector panels.
- Figure 1 is a diagram of a portable walk through metal detector fully assembled
- Figures 2a and 2b are diagrams of a portable walk through metal detector disassembled and ready for transport;
- Figures 3a and 3b are diagrams of one embodiment of an individual sensor panel
- Figure 4 is a diagram of one embodiment of a base member
- Figures 5a and 5b are diagrams of one embodiment of a top member
- Figures 6a and 6b are block diagrams of one embodiment of transmitter and receiver sensor panel circuits, coils, and connector systems, respectively;
- Figure 7 is a block diagram of one embodiment of the metal detection system
- Figure 8 is a detailed block diagram of the low duty cycle, detection circuit
- Figure 9 is waveform diagram of the low duty cycle, detection circuit.
- the attached figures illustrate a walk through metal detector and method with portable construction wherein the same can be utilized for rapid assembly, or disassembly and transport, which comprises of two structural base members to anchor the archway, multiple sensor panels with which the sides of the archway are constructed, and a top cross-member to join and support the walls of the archway.
- the base members consist of a housing to provide contact with the ground, mechanical hardware and fittings to facilitate mounting of the sensor panels, rechargeable batteries to provide the system power source, and electronic connectors to pass signals from the base section to adjacent sensor panels.
- the sensor panels consist of a housing to provide structure for the sensor coils and electronics, mechanical hardware and fittings to facilitate mounting of adjacent panels and/or other structural members, sensor coil windings, electronic circuits to provide the coil excitation or to process the received signals, multi-color LED target indicators, pairs of infrared emitting and photo diodes to detect the presence and speed of persons passing through the detector archway, and electronic connectors to pass signals from the sensor panel to adjacent sections.
- the top cross-member consists of a housing to join and support the walls of the archway, mechanical hardware and fittings to facilitate mounting of the sensor panels, electronic circuits to provide the master processing of the metal detection system, input and output devices to provide the user with an interface for control and informational display, and electronic connectors to pass signals from the top section to adjacent sensor panels.
- the top cross-member provides a vehicle platform for moving a disassembled unit with built-in wheels, a handle, and stacking structures to support the other members.
- the fully assembled portable walk through metal detector (10) preferably includes two base members (11 and 12), a top cross-member (13), and in this embodiment, six sensor panels (14 - 19), as shown in figure 1.
- the lower sensor panels (14 and 17) are mechanically mounted and fastened to each respective base member (11 and 12). In addition, when the sensor panel is properly mounted to the base member, an electrical connection is made as well, allowing signals to pass between each respective member.
- the lower sensor panels are also mechanically mounted and fastened to middle sensor panels (15 and 18), again providing electrical connection for signals to pass from member to member.
- the middle sensor panels are also mechanically mounted and fastened to upper sensor panels (16 and 19), again providing electrical connection between each respective member.
- the top cross- member (13) is mechanically mounted and fastened to each upper sensor panel, providing an electrical connection between the top and each respective upper panel.
- the disassembled portable walk through metal detector is shown in figure 2a, displaying the top cross-member (13) as a vehicle platform for moving a disassembled unit.
- the top member contains built-in features including wheels (41 and 42) and a handle (43), shown in figure 2b, to provide mobility.
- stacking structures are provided to support other members as they are placed upon it for transport (detailed in figure 5).
- the base members (11 and 12) are stacked upon the top cross- member, with the sensor panels (14 - 19) stacked on top, in no particular order.
- the disassembled unit is then fastened together for transport by a strap (49).
- the sensor panel (14) is shown in figures 3a and 3b.
- Each sensor panel contains fastening mechanisms on top (51) and bottom (52) to enable proper mechanical mounting to adjacent members.
- Each panel also possesses electrical connectors at the top (53), shown in figure 3a, and at the bottom (54), shown in figure 3b, to make proper contact for the passing of electronic signals from member to member.
- Each receiver panel contains two multi-color LEDs (55a,b) to provide detection information for each target that passes through the fully assembled unit, displaying at each edge of the panel.
- Each panel also contains either a pair of infrared LEDs (59a), or a pair of photo diodes (59b), to detect the presence and speed of persons passing through the detector archway.
- Each of the sensor panels possess stacking structures on the exterior of the housing (57 and 58) to enable each panel to be properly fitted when the unit is fully disassembled and stacked for transport (refer to figure 2).
- Each of the sensor panels in this embodiment (14 -19) is identical mechanically. Inside each sensor panel, the electronic detection systems, of which one embodiment is described by figures 6a and 6b, is contained.
- a base member (12) is shown in figure 4.
- Each base member contains fastening mechanisms (21 and 22) to enable proper mechanical mounting to the sensor panel that rests upon it.
- Each base member also possesses an electrical connector (23) to make proper contact for the passing of electronic signals between the base member and sensor panel.
- Each base also contains a rechargeable battery (24) contained inside, a recharge connector (25), and a leveling mechanism (26) to provide physical stability of the fully assembled unit when resting on an uneven surface.
- the top cross-member (13) is shown in figures 5a and 56.
- the top member contains fastening mechanisms (31- 34) to enable proper mechanical mounting to the upper sensor panels underneath.
- the top member also possesses two electrical connectors (35 and 36) to make proper contact for the passing of electronic signals to and from each upper sensor panel.
- the top member contains a multi-color entry LED (37) to notify those about to enter the portable walk through metal detector when to proceed (green light) and when to wait (red light), shown in figure 5a.
- the presence and size of a target is indicated by a LED bar graph (38), shown in figure 5b.
- An audio alert is also provided to enunciate the presence of a detected target with a speaker or piezo device (46).
- the control of the detector is accomplished with a keypad (39) and a LCD display (40), shown in figure 5a.
- the top member contains built-in features including wheels (41 and 42), shown in figure 5a, and a handle (43), shown in figure 5b, to provide mobility.
- stacking structures (44 and 45) are provided to support other members as they are placed upon it for transport.
- FIG. 6a One embodiment of an electronic metal detection system is shown in figures 6a and 6b. This type of electronic system is contained inside the sensor panels.
- the transmitter circuit (61a) is connected to an inductive coil of wire (62a). The coil will be energized by the transmit circuit to produce a magnetic field which can effect metal targets in proximity of the coil.
- a pair of infrared LEDs (59a) will provide infrared beams to enable the detection and speed of objects passing between transmit and receive panels.
- the receiver circuit (61b) is connected to a pair of inductive coils of wire (62b).
- the coil pair will have an electronic signal induced in it when a magnetic field, emanating from a metal target, is in proximity of the coil.
- a pair of photo diodes (59b) detect the presence and speed of persons passing through the detector archway, by monitoring infrared beams from the transmitter system. The presence of a target is indicated by the multi-color LEDs (55a,b).
- signals are passed to and from the circuit of one sensor panel to another adjacent member by connectors (53 and 54).
- the sensor panels (reference figure 3) are stacked upon the base members (reference figure 4).
- the additional sensor panels are stacked upon each other, in no particular order.
- the top cross-member (reference figure 5) is attached to the upper sensor panels to join and support the archway.
- Each individual member is connected to an adjacent member both mechanically, with fasteners, and electrically, with electronic connectors.
- the mechanical connection provides mechanical stability, and the electronic connectors provide an electronic signal path to each member.
- the rechargeable batteries (24) contained in the base members supply the power for the metal detection system.
- a number of contacts for each connector are required to pass the power, ground, analog, and digital signals from member to member.
- the transmit chain (shown on the left side of the drawing) requires "m" contacts at each connector to pass the necessary signals to each of the transmitter circuits (61a).
- the transmit coils (62a) will be energized by the transmitter circuits at the appropriate times.
- the timing for the transmit pulses is controlled by the microcontroller (70), which also uses a portion of the "m" lines to communicate with each of the transmitter circuits.
- a portion of these lines can also be used for addressing and identification of each transmit module, allowing the microcontroller (70) to automatically identify the position of each transmitter sensor panel (top, middle, or bottom).
- the infrared LEDs (59a) emit an infrared beam that will be sensed by a receiver module located directly across the archway.
- the receive chain uses "n" lines (and contacts between members) to pass the necessary signals (power, ground, analog, and digital) to each of the receiver circuits (61b). A portion of these lines can also be used for addressing and identification of each receive module, allowing the microcontroller (70) to automatically identify the position of each receiver sensor panel (top, middle, or bottom). As described in figure 6, the receiver coils (62b) will have an electronic signal induced in them when a magnetic field emanating from a metal object is in proximity to the coils.
- This signal is processed by the receiver circuit (61b) and communicated to the microcontroller (70).
- the photo diodes (59b) will detect when the infrared beam from the transmitter panel located directly across is broken by something passing through the archway, and communicate this to the microcontroller as well.
- the presence of a target signal is displayed by the multicolored LEDs (55a,b) in each affected member.
- the microcontroller (70) will cause an audio alert in a speaker (46), and a signal strength bar- graph display (38).
- the microcontroller (70) will also control the color of the entry LED (37) that indicates activity status of the detector (for example, the LED will be green if the detector is ready to accept a new entry, yellow if the detector is busy processing a recent signal, and red if a metal target is detected).
- the keypad (39) and LCD (40) allows the user to turn the detector on or off, and adjust detector settings (for example, sensitivity and volume levels). The system can restrict access to detector settings by unauthorized personnel through the use of passwords.
- the core of this invention is the portability of the walk through metal detector provided by a combination of physical and electrical features.
- a physical feature of this detector that provides portability is the stacking design of each individual member.
- the nine members are placed in the upright position by stacking each member from the base up, and securing the members with the fastening mechanisms. This allows the unit to be assembled rapidly.
- each sensor panel housing is identical physically (refer to figure 3), and therefore, no particular ordering of sensor panels on any given side is necessary.
- Each individual transmit sensor panel is interchangeable with any other transmit panel; likewise.
- each individual receive panel is interchangeable with any other receive panel. This provides for rapid assembly of the standing unit, because there is no restriction of assembly position. This also allows rapid repair through the replacement of any panel as necessary, since the panels are completely modular.
- Figures 1 and 3 show the sensor panel construction includes windowed cut outs (six per panel in this embodiment), improving the portability of this invention by reducing the weight of each panel.
- the windowed design provides less wind resistance and provides visibility into the standing unit for security personnel to better examine the people being screened by the portable walk through metal detector.
- top cross-member (13) is made from injection molded
- Panels (14-19) and base members (11, 12) are preferably made of the same ABS/Polycarbonate material, but do not need to be sealed. Since the inter-panel connectors are surface mounted, they present a barrier to water that keep most of the water out of the panels if the unit were left disassembled out in the rain.
- the connector areas themselves (51,52) is preferably ringed with interlocking baffles (80) molded into the panels' ends. The baffles help prevent sprayed water or driving rain from getting to the contacts and possibly impairing performance while the unit is assembled and in operation.
- the panels' halves include a tongue and groove type design about their perimeters that acts to impede, but not completely block, the ingress of sprayed water or driving rain.
- the circuitry within the panels that could be sensitive to moisture is encapsulated in sealant to protect it from any moisture that finds its way inside the panels.
- the base members preferably contain no sensitive electronics, and thus, there is preferably nothing in them that requires moisture protection.
- the panels and bases preferably include drain holes in them through which condensation, or any other water that finds its way inside, can drain. This helps ensure that these components won't have standing water build up inside.
- the batteries are preferably sealed in plastic by the manufacturer, and thus, are not damaged by moisture.
- the batteries terminals are generally too far apart for sprayed water to effectively short them out since they are preferably low voltage batteries.
- the preferred batteries resemble typical small craft batteries such as motorcycle batteries.
- Recharge connector socket (25) for receiving a cable from a battery charger preferably includes an integral sealed cover.
- the internal contacts' spacing of the charger is so great that it does not present a problem for a 12 volt system even if they do get wet.
- these sockets are cigarette lighter type sockets manufactured for use on personal watercraft.
- the battery charger is preferably a stand-alone device and is preferably built into a sealed 'nema4X' rated die cast aluminum box.
- the cabling going in and out is sealed with appropriate standard, waterproof cable grommets with integral strain relief.
- the internal circuitry has independent and redundant passive and active output short circuit protections.
- the internal transformer is certified by all international agencies for safety and is power limited by design, so that it cannot produce dangerously high power levels.
- the modular design of the members allow for the rapid disassembly and transport of this invention as well.
- the members readily stack upon each other with the top member forming a platform for the bases, and then the panels to be stacked.
- the inclusion of the wheels and handle on the top member (refer to figure 5b) provide a self-contained transport mechanism.
- the members can be strapped together after stacking, and the disassembled unit can be rolled to another location without requiring additional equipment for transportation.
- the detection system can operate as described next.
- the control keypad (item 39 in figure 5a) is used to turn the detector on.
- the microcontroller initiates a selftest/self- diagnosis routine to ensure that all members are properly functioning.
- the results of this self- test are displayed on the LCD (item 40 in figure 5a).
- the user can enter a password to gain access to an on-screen menu that allows various attributes of the detectors performance to be modified (such as sensitivity to targets, volume of audio target alert), or access to statistical information (such as a transit counter) at any time.
- the unit Upon completion of user settings or upon power-up, the unit will begin detecting by providing excitation signals to the transmitter coils, and monitoring both the receiver coil response and the status of the photo-receiver diodes on the interior of the archway.
- a valid target signal is obtained when both a signal is sensed by a receiver module, and an infrared beam has been broken by an object passing through the archway. This valid target can be displayed in various ways.
- the LED bar-graph (item 38 in figure 5b) can show signal strength of the received signal with multi-colored LEDs.
- the speaker or piezo element (item 46 in figure 5b) can provide an audio alert.
- the multi-color LED pairs on each side of the receiver sensor panels can also reveal where in the archway the target(s) were detected, showing red or yellow in the module zone(s) in which a target was detected by that module's receiver electronics, and the LCD (40) can display the type of alarm condition.
- the red LEDs are powered or lit if an object is detected regardless of the object's size.
- the yellow LEDs will preferably light only if multiple panels detect an object.
- a critical aspect of this invention is also the ability of the detection system to operate for a relatively long period of time without the necessity of battery recharge or an available AC power source.
- the high amplitude, low duty cycle, transmit pulse circuit described next makes this portable walk through metal detector an energy efficient detection system.
- Ul and LI are the transmitter circuit and transmit coil, respectively. More specifically, Ul is a coil charge circuit that charges the coil to a high current level, during the period shown in figure 9a. During the flyback period (refer to figure 9b) and for a period of time after, the resultant received signal is integrated (figure 9c).
- the receive signal is induced into receiver coils L2 and L3, amplified by U2, and then integrated by U3.
- the integrator output is captured by a track/hold circuit (U4), and filtered by a bandpass filter (BPF) to provide a receiver output.
- BPF bandpass filter
- the integrator is reset for the next sampling cycle; however, the track/hold circuit allows a long idle time before needing to go through another charge integrate-track cycle to refresh the output.
- the benefit of this system is providing the signal strength of a high voltage excitation level at a fraction of the power consumed by an equivalent continuous wave excitation system.
- the ratio of charge to idle time (duty cycle) can be very small (much less than 50%).
- the track/hold circuit preferably includes a first stage that includes an input resistor, an op-amp, an integrator capacitor, and a C-Mos SPDT switch, and a second stage that includes two passive RC filters, another C-Mos switch, and an op-amp buffer.
- the coil charge circuit preferably includes a power mosfet switch that connects a voltage supply across the transmit coil. While this switch is on, the coil charges. A high energy pulse is produced by the charged coil for a short period (for example, approximately ten microseconds) immediately after turning the switch off. This occurs because the stored field in the charged coil is allowed to collapse quickly.
- the present invention provides a metal detection circuit that provides a high amplitude, low duty cycle excitation pulse, which allows for the sensitivity of a high level excitation signal with the power economy of a much lower energy excitation signal.
- the receiver circuit portion collects and conditions the signals resulting from the relatively short duration, large amplitude excitation pulse, and goes in to hold mode during the relatively long charge and idle periods.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46683903P | 2003-04-29 | 2003-04-29 | |
US10/813,309 US7145456B2 (en) | 2003-04-29 | 2004-03-29 | Efficient electronics for a walk-through metal detector |
US10/813,288 US7193524B2 (en) | 2003-04-29 | 2004-03-29 | Systems and methods for a portable walk-through metal detector |
PCT/US2004/012966 WO2004097456A2 (en) | 2003-04-29 | 2004-04-27 | Systems and methods for a portable walk-through metal detector |
Publications (1)
Publication Number | Publication Date |
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EP1611460A2 true EP1611460A2 (en) | 2006-01-04 |
Family
ID=33425188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04750755A Withdrawn EP1611460A2 (en) | 2003-04-29 | 2004-04-27 | Systems and methods for a portable walk-through metal detector |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1611460A2 (en) |
JP (1) | JP2006525512A (en) |
KR (1) | KR20060016760A (en) |
AU (1) | AU2004235040A1 (en) |
WO (1) | WO2004097456A2 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2901888B1 (en) * | 2006-05-30 | 2008-08-22 | Alessandro Manneschi | PORTE DETECTOR OF METALS HAVING PERFECTED INDICATOR MEANS |
PL2108132T3 (en) * | 2007-01-15 | 2018-08-31 | Rapiscan Systems, Inc. | Detector systems |
DE102009003239B4 (en) | 2008-06-27 | 2014-02-06 | Nuctech Company Limited | Door-type safety investigation device |
JP5452980B2 (en) * | 2009-06-02 | 2014-03-26 | セキュリオン・二四株式会社 | Metal contamination detection system, metal contamination detection program |
US11280898B2 (en) | 2014-03-07 | 2022-03-22 | Rapiscan Systems, Inc. | Radar-based baggage and parcel inspection systems |
US10585206B2 (en) | 2017-09-06 | 2020-03-10 | Rapiscan Systems, Inc. | Method and system for a multi-view scanner |
FR3083329B1 (en) * | 2018-06-28 | 2021-06-18 | Alessandro Manneschi | PORTABLE DETECTION SYSTEM INCLUDING MAGNETOSTATIC SENSORS |
US11212902B2 (en) | 2020-02-25 | 2021-12-28 | Rapiscan Systems, Inc. | Multiplexed drive systems and methods for a multi-emitter X-ray source |
KR102612383B1 (en) * | 2023-04-28 | 2023-12-11 | 소니드로보틱스 주식회사 | Gate-type metal detector capable of determining the size of the detected object and A detector operating system using this gate-type metal detector |
KR102612377B1 (en) * | 2023-04-28 | 2023-12-11 | 소니드로보틱스 주식회사 | hand-held type metal detector capable of determining the size of the detected object and A detector operating system using hand-held type metal detector |
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US4539558A (en) * | 1981-11-24 | 1985-09-03 | Shin International, Inc. | Antitheft system |
US4470015A (en) * | 1981-11-25 | 1984-09-04 | Teknetics, Inc. | Metal detector system with undesirable target and mineralized ground discrimination |
US4821023A (en) * | 1988-01-07 | 1989-04-11 | Del Norte Technology, Inc. | Walk-through metal detector |
US4906973A (en) * | 1988-04-29 | 1990-03-06 | White's Electronics, Inc. | Walk-through metal detector |
US5521583A (en) * | 1994-01-19 | 1996-05-28 | Ranger Security Detectors, Inc. | Metal detection system |
KR100228251B1 (en) * | 1997-12-20 | 1999-11-01 | 박병용 | Gun type detecting system |
US6696947B1 (en) * | 2002-07-19 | 2004-02-24 | Xtreme Research Corporation | Metal detector |
-
2004
- 2004-04-27 EP EP04750755A patent/EP1611460A2/en not_active Withdrawn
- 2004-04-27 AU AU2004235040A patent/AU2004235040A1/en not_active Abandoned
- 2004-04-27 WO PCT/US2004/012966 patent/WO2004097456A2/en active Application Filing
- 2004-04-27 KR KR1020057020523A patent/KR20060016760A/en not_active Application Discontinuation
- 2004-04-27 JP JP2006513368A patent/JP2006525512A/en active Pending
Non-Patent Citations (1)
Title |
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See references of WO2004097456A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004097456A3 (en) | 2006-03-09 |
WO2004097456A2 (en) | 2004-11-11 |
AU2004235040A1 (en) | 2004-11-11 |
KR20060016760A (en) | 2006-02-22 |
JP2006525512A (en) | 2006-11-09 |
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