WO1995018905A1 - Sas de securite - Google Patents

Sas de securite Download PDF

Info

Publication number
WO1995018905A1
WO1995018905A1 PCT/DE1995/000006 DE9500006W WO9518905A1 WO 1995018905 A1 WO1995018905 A1 WO 1995018905A1 DE 9500006 W DE9500006 W DE 9500006W WO 9518905 A1 WO9518905 A1 WO 9518905A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermal imaging
person
lock according
imaging camera
thermal
Prior art date
Application number
PCT/DE1995/000006
Other languages
German (de)
English (en)
Inventor
Bernd Poley
Original Assignee
Bernd Poley
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 Bernd Poley filed Critical Bernd Poley
Publication of WO1995018905A1 publication Critical patent/WO1995018905A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/005—Prospecting or detecting by optical means operating with millimetre waves, e.g. measuring the black losey radiation

Definitions

  • the invention relates to a security gate with a detection device according to the preamble of claim 1.
  • Detection devices of this type are used, for example, at airports to examine passengers for weapons, explosives, contraband, etc.
  • a security lock in the form of a frame through which the persons to be examined have to pass.
  • This frame is part of a detection device which reacts to metallic objects in the same way as a hand probe and only the manual passing along a probe on the body spared, but otherwise has the same disadvantages as this.
  • the invention is therefore based on the object of providing a security lock according to the preamble of claim 1, with which objects introduced into the security lock by persons can be recognized both in terms of their shape and largely independently of their material, and which are simple to check of people possible.
  • the detection device consists of at least one thermal imaging camera, which detects the infrared radiation emitted by the person and the objects introduced and displays it in the form of a thermal image.
  • the temperature distribution on the outer skin of a person's clothing can be represented in a pictorial manner. If an object is under human clothing, this object absorbs part of the infrared radiation emitted by the body and can be made visible on the thermal image due to its lower temperature. In other words, this means that, due to a temperature deviation, the contours of an object which absorbs the heat radiation can be made visible.
  • At least two thermal imaging cameras are preferably provided, which record the person to be examined from different sides. In this way, the risk can be reduced or completely eliminated that certain parts of the body of the person lie in the "receiving shadow" of a thermal imaging camera and therefore cannot be detected by it.
  • the thermal imaging camera can be arranged on the side next to and at the same height or above the person to be examined.
  • a cost-effective arrangement is obtained if the thermal imaging camera is arranged in a fixed, fixed distance from a predetermined examination site.
  • the thermal imaging camera can be moved on a predetermined movement path relative to the examining person by means of a holding device.
  • a holding device it is possible, for example, to move the thermal imaging camera at least partially around the person to be examined in order to be able to take this person from all sides.
  • a particularly secure arrangement results if a metal probe is provided in addition to the thermal imaging camera.
  • the metal probe is advantageously arranged relative to the thermal imager in such a way that the recording areas of the metal probe and the thermal imager overlap at least partially. It is also favorable if the recording area of the thermal imaging camera lies above the recording area of the metal probe.
  • the division of the recording areas between the metal probe and the thermal imaging camera can, for example, be such that the upper body is recorded by the thermal imaging camera, while the leg area is captured by the metal probe.
  • a personal separation system in the form of a corridor and the thermal imager is aligned with this corridor in such a way that its recording area lies within the corridor. This ensures that individual people are not shielded from other people.
  • the corridor runs in an angular or curved manner, with two spaced-apart thermal imaging cameras monitoring the corner or curvature area being provided.
  • two spaced-apart thermal imaging cameras monitoring the corner or curvature area being provided.
  • a thermal imager it is possible for a thermal imager to be arranged on opposite sides of the corridor, which can be pivoted about a vertical axis.
  • the pivoting movement of the thermal imaging cameras can be controlled in such a way that they keep the person walking along the corridor in their recording area and thus record them both from the front, from the side and from behind.
  • the thermal imaging camera is advantageously connected to an electronic data processing system for evaluating the recorded intensity differences in the heat radiation of a person.
  • the security gate is designed as a mobile unit.
  • the security gate can, for example, be permanently installed on a trolley or can consist of easily assembled and disassembled individual parts which are assembled and disassembled at the desired location.
  • the invention relates to a method for the detection of objects, such as weapons, explosives or the like, introduced by persons into a security lock.
  • the heat radiated by the person and the objects is detected and due to temperature deviations between the person and Item creates a thermal image of the item.
  • FIG. 1 shows a schematic representation of the recording areas of a detection device consisting of a thermal imaging camera and a metal probe
  • Fig. 5 is a schematic representation of a thermal imaging camera combined with a rotatable bottom part
  • 6 to 10 are schematic representations of alternative arrangement and training options for thermal imaging cameras and corridors.
  • FIG. 1 shows a person 1 to be examined, who is examined contactlessly for objects such as weapons, explosives or the like by means of a combination of a thermal imaging camera 2 and a metal probe 3.
  • the thermal imaging camera 2 is arranged such that it is aligned with the upper body of the person 1, while the recording area of the metal probe 3 is aligned with the leg area of the person 1.
  • the recording area of the thermal imaging camera 2 is denoted by a and that of the metal probe 3 by b.
  • the recording areas a, b overlap by "dead points", i.e. to avoid areas of the person 1 recorded by the thermal imaging camera 2 or by the metal probe 3.
  • the recording area b of the metal probe 3 should be approximately 0.8 m. Furthermore, the recording area a of the thermal imaging camera 2 should overlap by 0.1 m with the recording area b of the metal probe 3 to a room height of approximately 2.5 m, so that the thermal imaging camera 2 should record a height of 1.8 m.
  • the required temperature resolution is of great importance. This temperature resolution is determined from the temperature difference between the outside temperature of the human clothing on the one hand with and on the other hand without an object under the clothing. An appropriate value for the required temperature resolution is 0.4 ° Kelvin.
  • the thermal imaging camera 2 is arranged in the middle of the recording area a and laterally next to the person 1. With a vertical field of view angle ⁇ of the thermal imaging camera 2, the distance 1 of the thermal imaging camera 2 from the person 1 is 2 m. With such a design, the receiving area a covers the entire upper body area of the person 1 up to the ceiling 4 of the receiving space.
  • the thermal imaging camera 2 is arranged at the level of the ceiling 4 of the recording area and laterally next to the person 1 to be examined.
  • the thermal imaging camera 2 is oriented such that the upper limit of its recording area runs horizontally directly below the ceiling 4.
  • the person to be examined 1 In order to ensure reliable detection of the objects to be tracked down, the person to be examined 1 must be recorded from different sides by means of the thermal imaging camera 2. If the person 1 is recorded from two opposite sides, as shown schematically in FIG. 4, dead spots 5 still occur, which cannot be represented by the thermal imaging camera (s) 2. If weapons etc. are carried in the area of these dead centers 5, there is a risk that they will go undetected.
  • the security gate must therefore be constructed in such a way that such dead spots 5 are avoided.
  • FIG. 5 One possibility for avoiding such dead centers is shown in FIG. 5.
  • the person to be examined 1 enters a base part 6 which can be rotated about a vertical axis and is rotated through 360 ° on this base part.
  • the thermal imaging camera 2 is located on the side next to the person 1 to be examined, halfway up the upper body. Due to the constant distance between the person son 1 and the thermal imager 2, distortions of the thermal image can be avoided. Since only one thermal imaging camera 2 is required, it is also a very cost-effective solution. Furthermore, the space requirement of this arrangement is relatively small.
  • a personal separation system is provided in the form of a corridor 7, which extends at an angle of 90 °.
  • a thermal imaging camera 2 is provided in front of and behind the bend in the corridor 7.
  • the two thermal imaging cameras 2 are aligned with one another in such a way that the front thermal imaging camera 2 records the person 1 to be examined laterally from the rear and the rear thermal imaging camera 2 the person 1 laterally from the front when the person 1 is in position A before the bend. If the person to be examined 1 continues around the corner of the corridor 7 to the position A ', the person rotates through 90 ° with respect to the thermal imaging cameras 2, so that dead spots can be avoided.
  • a thermal imaging camera 2 is provided, which is attached to a movable arm or bracket 8 in the ceiling area.
  • the arm 8 is rotatable about a vertical axis 9, as indicated by the arrow 10.
  • the thermal imaging camera 2 can itself be pivotally attached to the arm 8, as shown by the arrow 11.
  • the thermal imaging camera 2 is pivoted around the person 1 by means of the arm 8.
  • two thermal imaging cameras 2 are provided which can be pivoted about a vertical axis 12.
  • 8A shows the position of the thermal imaging cameras 2 when the person 1 is in front of the cameras.
  • 8B shows the position of the thermal imaging cameras 2 when the person 1 is in the corridor 7 has passed along the thermal imaging cameras 2.
  • the thermal imaging cameras 2 are pivoted with the person 1, so that the person 1 is always in the recording area of the thermal imaging cameras 2.
  • the pivoting movement of the thermal imaging cameras 2 can be controlled by a suitable microprocessor control. Dead spots are also avoided in this exemplary embodiment.
  • FIGS. 9A and 9B shows a similar arrangement to that in FIGS. 8A and 8B.
  • both thermal imaging cameras 2 are guided in a semicircle around the vertical axis 12 when the person 1 passes the thermal imaging cameras 2.
  • the corridor 7 is U-shaped and has a front section 7.1 and a section 7.2 which is led back in parallel.
  • a thermal imaging camera 2 In the area of the bend of the corridor 7 there is a thermal imaging camera 2, the longitudinal axis of which runs parallel to that of the sections 7.1 and 7.2.
  • a second thermal imaging camera 2 Seen in the running direction of the corridor 7 behind this first thermal imaging camera 2 there is a second thermal imaging camera 2, the longitudinal axis of which is oriented perpendicular to the first thermal imaging camera. If the person 1 to be examined moves from position A to position A 1 , then person 1 inevitably rotates in the region of the bend relative to the thermal imaging cameras 2, so that dead spots can again be avoided here.
  • FIG. 11 An arrangement similar to that of FIG. 10 can be seen from FIG. 11, in which two thermal imaging cameras 2 are again provided to the side of the corridor 7.
  • the thermal imaging cameras 2 are not arranged on the straight sections of the corridor 7, but in the region of the corners, the longitudinal axes of the thermal imaging cameras 2 are in turn arranged perpendicular to each other.
  • FIGS. 5-11 With the aid of the arrangements shown in FIGS. 5-11, it is possible to examine people from all sides for objects such as weapons, explosives, etc., without dead spots occurring. With the help of thermal imaging cameras, it is possible to visualize the contours of such objects, which are concealed under clothing, by means of a thermal image. The effect is exploited here that objects of this type partially absorb the heat radiated by the body and thus cause a temperature difference which is detected by the thermal imaging camera.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radiation Pyrometers (AREA)

Abstract

Sas de sécurité équipé d'un dispositif détecteur destiné à dépister des objets, tels qu'armes, explosifs ou analogues amenés par des personnes dans le sas, caractérisé en ce que le dispositif détecteur comprend au moins une caméra thermographique (2) détectant les radiations infrarouges émises par la personne (1) et les objets amenés et les représentant sous la forme d'une image thermographique.
PCT/DE1995/000006 1994-01-05 1995-01-04 Sas de securite WO1995018905A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4400190.8 1994-01-05
DE19944400190 DE4400190C2 (de) 1994-01-05 1994-01-05 Sicherheitsschleuse und Verfahren zum Aufspüren von durch Personen in eine Sicherheitsschleuse eingebrachten Gegenständen

Publications (1)

Publication Number Publication Date
WO1995018905A1 true WO1995018905A1 (fr) 1995-07-13

Family

ID=6507496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000006 WO1995018905A1 (fr) 1994-01-05 1995-01-04 Sas de securite

Country Status (2)

Country Link
DE (1) DE4400190C2 (fr)
WO (1) WO1995018905A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747784A1 (de) * 1997-10-29 1999-05-06 Rothe Lutz Dr Ing Habil Objekterkennung mittels Thermosignaturanalyse
SG138442A1 (en) * 2003-05-13 2008-01-28 Honeywell Int Inc Combined imaging system
FR2867864B1 (fr) * 2004-03-17 2007-03-02 Automatic Systems Procede et installation de detection de passage associe a une porte d'acces
WO2008010832A2 (fr) * 2005-11-21 2008-01-24 Arroyo Sciences, Inc. Détection d'objets d'intérêt en fonction d'une différence d'émissivité
US11719580B1 (en) * 2020-05-14 2023-08-08 Fireside Security Group, Inc. Integrated access gateway

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4586441A (en) * 1982-06-08 1986-05-06 Related Energy & Security Systems, Inc. Security system for selectively allowing passage from a non-secure region to a secure region

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Publication number Priority date Publication date Assignee Title
US3713156A (en) * 1970-10-12 1973-01-23 R Pothier Surface and subsurface detection device
US4031401A (en) * 1975-03-14 1977-06-21 American Science & Engineering, Inc. Radiant energy imaging scanning
DE2917796C2 (de) * 1979-05-03 1981-12-17 Hochtief Ag Vorm. Gebr. Helfmann, 4300 Essen Verfahren und Anlage zur Ermittlung von Bewehrungseisen in einer Stahlbetonkonstruktion
JPH0786537B2 (ja) * 1987-09-26 1995-09-20 松下電工株式会社 人体検出装置
JP2552728B2 (ja) * 1989-05-31 1996-11-13 富士通株式会社 赤外線監視システム
DE3933796C1 (en) * 1989-10-10 1991-05-08 Paul Hochkoepper Gmbh & Co Kg, 5880 Luedenscheid, De IR alarm with tiltable housing - maintaining reception plane at right angles to observation plane

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4586441A (en) * 1982-06-08 1986-05-06 Related Energy & Security Systems, Inc. Security system for selectively allowing passage from a non-secure region to a secure region

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"CERAMIC CAMERA IMPROVES ITS THERMAL IMAGE", NEW ELECTRONICS, vol. 24, no. 9, DARTFORD GB, pages 19 - 20, XP000310172 *
MASAFUMI KIMATA: "A 512X512-ELEMENT PtSi SCHOTTKY BARRIER INFRARED IMAGE SENSOR", I.E.E.E. JOURNAL OF SOLID STATE CIRCUITS, vol. SC-22, no. 6, NEW YORK, pages 1124 - 1129 *

Also Published As

Publication number Publication date
DE4400190A1 (de) 1995-07-06
DE4400190C2 (de) 1996-07-11

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