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EP2812735A2 - Method and device for inspecting the cargo space of a truck - Google Patents

Method and device for inspecting the cargo space of a truck

Info

Publication number
EP2812735A2
EP2812735A2 EP13703800.6A EP13703800A EP2812735A2 EP 2812735 A2 EP2812735 A2 EP 2812735A2 EP 13703800 A EP13703800 A EP 13703800A EP 2812735 A2 EP2812735 A2 EP 2812735A2
Authority
EP
European Patent Office
Prior art keywords
truck
cab
ghz
ray source
electromagnetic radiation
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Withdrawn
Application number
EP13703800.6A
Other languages
German (de)
French (fr)
Inventor
Michael Jeck
Patricia Schall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smiths Heimann GmbH
Original Assignee
Smiths Heimann GmbH
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 Smiths Heimann GmbH filed Critical Smiths Heimann GmbH
Publication of EP2812735A2 publication Critical patent/EP2812735A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/232—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays having relative motion between the source, detector and object other than by conveyor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/223—Mixed interrogation beams, e.g. using more than one type of radiation beam
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/224—Multiple energy techniques using one type of radiation, e.g. X-rays of different energies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/226—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays using tomography

Definitions

  • the invention relates to a method for checking a truck, in which the load compartment of the truck is X-rayed while the truck is moved past the X-ray source, and an apparatus for carrying out the method.
  • a typical length of the cab is assumed, and X-ray fluoroscopy starts at a fixed distance from the tip of the truck. This method involves the risk that a part of the hold is not illuminated and thus not checked. If the driver's cab is assessed as too short, this may result in unintentional irradiation of the people in the driver's cab.
  • a method and a device of the generic type are known from DE 101 22 279 A1.
  • This document describes an X-ray system with a diaphragm for the X-rays, whose opening and closing is controlled by a bar code reader.
  • a barcode is attached to the load compartment of each truck to be tested, which triggers the beginning of the X-ray examination, by causing the opening of the aperture. Since barcodes must be attached to each truck as markings, this procedure is very time consuming.
  • the invention is therefore an object of the invention to improve a method of the generic type so that an accurate and rapid distinction between the not to be screened cab and to be screened load compartment of a truck.
  • This object is achieved according to the invention in that for determining the switch-on point of the X-ray source of the truck is irradiated with electromagnetic radiation of a frequency between 10 GHz and 1 THz and the passing or reflected at the transition between the driver's cab and the cargo radiation is measured.
  • the invention makes use of the fact that the driver's cab and the loading compartment of a truck are usually limited by metal walls.
  • aerodynamic fairings at the transition between the driver's cab and the cargo area usually consist of plastic-based materials such as glass fiber reinforced plastics (GRP), whose reflection and thus transmission behavior is different for the electromagnetic radiation used.
  • GRP glass fiber reinforced plastics
  • Radar beams of a frequency between 30 GHz and 300 GHz are preferably used to determine the switch-on time.
  • the speed of a truck moving past is determined by means of an additional radar sensor.
  • the speed of a truck moving past is determined by means of an additional radar sensor.
  • Figure 1 roughly schematically the side view of a
  • FIG. 1 shows a lorry which contains a loading space 1, a driver's cab 2 and a transition area 3 between the driver's cab 2 and the loading space 1.
  • the transition region 2 is aerodynamically lined to reduce drag.
  • the aerodynamic panels are made of plastic-based materials, such as glass fiber reinforced plastic (GRP), which are optically opaque to electromagnetic radiation in the visible range.
  • GRP glass fiber reinforced plastic
  • the X-ray inspection system contains an X-ray source and a detector arrangement, which is aligned with the X-ray source, and between which there is a route for the truck. So that containers made of metal can be irradiated for checking, the X-ray source emit X-rays with a sufficiently high energy of more than 1 MeV.
  • the truck drives automatically through the X-ray inspection.
  • the driver thus drives the truck on the route between the stationary X-ray source and the stationary detector array past them.
  • the X-ray source To protect the driver, it is necessary for the X-ray source to be switched off while the driver's cab is passing by.
  • the X-ray source must be turned on to check the beginning of the hold.
  • To determine the turn-on of the X-ray source of the truck is irradiated on one side with electromagnetic radiation of the frequency between 1 GHz and 1 THz until the transition region between the cab and the cargo space is detected and thus safely passed the cab.
  • the electromagnetic radiation passing or reflected at the transition between the driver's cab and the load compartment is measured.
  • the detection systems are operated either in transmission mode (FIG. 2, FIG. 3) or in reflection mode (FIG. 4, FIG. 5).
  • a transmission unit 4 is arranged on one side of the travel path.
  • a receiving unit 5 is aligned with the receiving unit 5 for receiving transmitted radiation which has penetrated the truck.
  • the power received by the receiving unit 5 is very low.
  • the received power increases significantly. This increase is a clear sign that the driver's cab 2 has moved past and now the cargo space 1 enters the beam path of the X-ray source.
  • the X-ray source can therefore be turned on to check the cargo space 1.
  • a transmitting and receiving unit 6 for the electromagnetic radiation is arranged on one side. The received power is high as long as radiation from the metallic cab 2 is reflected.
  • the received reflection power drops markedly.
  • the plastic-based lining of the truck in the transition region 3 allows the predominant portion of the radiation to pass through without reflecting it.
  • the received power drops significantly, the X-ray radiation can be switched on because the driver's cab 2 is no longer in the beam path of the X-radiation.
  • an additional radar sensor is preferably arranged in the X-ray inspection system, which determines the speed of the truck passing them.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)

Abstract

Methods for inspecting the cargo space (1) of a truck are known in which the truck is moved past an X-ray source that is switched on while the cargo space (1) is being moved past the source and is switched off while the driver's cab (3) is being moved past the source. According to the invention, the truck is irradiated with electromagnetic radiation having a frequency between 1 GHz and 1 THz and the electromagnetic radiation passing through or reflected at the transition (3) between the driver's cab (2) and the cargo space (1) is measured, in order to determine the switch-on time for the X-ray source.

Description

B E S C H R E I B U N G  DESCRIPTION
Verfahren und Vorrichtung zur Überprüfung des Laderaums eines Lastkraftwagens Method and device for checking the loading space of a truck
Die Erfindung betrifft ein Verfahren zur Überprüfung eines Lastkraftwagens, bei dem der Laderaum des Lastkraftwagens mit Röntgenstrahlen durchleuchtet wird, während der Lastkraftwagen an der Röntgenquelle vorbeibewegt wird, und eine Vorrichtung zur Durchführung des Verfahrens. The invention relates to a method for checking a truck, in which the load compartment of the truck is X-rayed while the truck is moved past the X-ray source, and an apparatus for carrying out the method.
Zur Überprüfung von Lastkraftwagen auf verdächtige Güter (Waffen, Sprengstoffe, Schmuggelware etc.) werden bekannterweise Anlagen ohne eigene Fördersysteme verwendet, bei denen ein Fahrer den Lastkraftwagen durch die Prüfanlage fährt. Werden Container als Laderaum durchleuchtet, so müssen höherenergetische Röntgenstrahlen mit einer Energie von mehr als 1 MeV verwendet werden, die auch die Fahrerkabine durchdringen können. Zum Schutz des Fahrers ist es deshalb erforderlich, die Röntgenquelle auszuschalten, während sich die Fahrerkabine an dieser vorbeibewegt. Sobald die Fahrerkabine vorbeibewegt ist, wird die Röntgenquelle zur Durchleuchtung des nachfolgenden Laderaums, beispielsweise eines Containers, wieder eingeschaltet. Zur Bestimmung des Übergangs zwischen der Fahrerkabine und dem Laderaum und damit zur Bestimmung des Einschaltzeitpunktes der Röntgenquelle sind optische Verfahren bekannt, bei denen Lichtschranken verwendet werden. Da der Übergangsbereich zwischen Fahrerkabine und Laderaum zunehmend durch aerodynamische Verkleidungen abgedeckt wird, lässt sich die Einschaltposition der Röntgenstrahlen nicht mehr ausreichend genau genug mit Lichtschranken bestimmen. To check trucks for suspicious goods (weapons, explosives, contraband, etc.) are known to use systems without their own conveyor systems, in which a driver drives the truck through the test system. If containers are examined as loading space, higher-energy X-rays with an energy of more than 1 MeV must be used, which can also penetrate the driver's cab. To protect the driver, therefore, it is necessary to turn off the X-ray source while the driver's cab is passing by. As soon as the driver's cab has passed, the x-ray source is switched on again for the purpose of examining the following loading space, for example a container. To determine the transition between the driver's cab and the loading space and thus to determine the switch-on of the X-ray source optical methods are known in which light barriers are used. As the transitional area between the driver's cab and the cargo space is increasingly covered by aerodynamic fairings, the switch-on position of the X-rays can no longer be determined sufficiently accurately with light barriers.
Nach einem anderen Verfahren wird eine typische Länge der Fahrerkabine angenommen, und die Durchleuchtung mit Röntgenstrahlen beginnt bei einem festen Abstand von der Spitze des Lastkraftwagens. Dieses Verfahren birgt das Risiko, dass ein Teil des Laderaums nicht durchleuchtet und somit nicht geprüft wird. Wird die Fahrerkabine als zu kurz eingeschätzt, kann es zu einer unabsichtlichen Bestrahlung der Personen in der Fahrerkabine kommen. According to another method, a typical length of the cab is assumed, and X-ray fluoroscopy starts at a fixed distance from the tip of the truck. This method involves the risk that a part of the hold is not illuminated and thus not checked. If the driver's cab is assessed as too short, this may result in unintentional irradiation of the people in the driver's cab.
Ein Verfahren und eine Vorrichtung der gattungsgemäßen Art sind aus der DE 101 22 279 A1 bekannt. Diese Schrift beschreibt eine Röntgenanlage mit einer Blende für die Röntgenstrahlen, deren Öffnen und Schließen über einen Barcodeleser gesteuert wird. Dazu wird am Laderaum jedes zu prüfenden Lastkraftwagens ein Barcode angebracht, der den Beginn der Röntgenprüfung auslöst, indem er die Öffnung der Blende veranlasst. Da an jedem Lastkraftwagen Barcodes als Markierungen angebracht werden müssen, ist dieses Verfahren sehr zeitaufwändig. A method and a device of the generic type are known from DE 101 22 279 A1. This document describes an X-ray system with a diaphragm for the X-rays, whose opening and closing is controlled by a bar code reader. For this purpose, a barcode is attached to the load compartment of each truck to be tested, which triggers the beginning of the X-ray examination, by causing the opening of the aperture. Since barcodes must be attached to each truck as markings, this procedure is very time consuming.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art so zu verbessern, dass eine genaue und schnelle Unterscheidung zwischen der nicht zu durchleuchtenden Fahrerkabine und dem zu durchleuchtenden Laderaum eines Lastkraftwagens ermöglicht. Diese Aufgabe wird nach der Erfindung dadurch gelöst, dass zur Bestimmung des Einschaltpunkts der Röntgenquelle der Lastkraftwagen mit elektromagnetischen Strahlen einer Frequenz zwischen 10 GHz und 1 THz bestrahlt wird und die am Übergang zwischen der Fahrerkabine und dem Laderaum durchtretende oder reflektierte Strahlung gemessen wird. The invention is therefore an object of the invention to improve a method of the generic type so that an accurate and rapid distinction between the not to be screened cab and to be screened load compartment of a truck. This object is achieved according to the invention in that for determining the switch-on point of the X-ray source of the truck is irradiated with electromagnetic radiation of a frequency between 10 GHz and 1 THz and the passing or reflected at the transition between the driver's cab and the cargo radiation is measured.
Die Erfindung macht sich dabei den Umstand zu Nutze, dass die Fahrerkabine und der Laderaum eines Lastkraftwagens in der Regel von Metallwänden begrenzt werden. Aerodynamische Verkleidungen am Übergang zwischen Fahrerkabine und Laderaum bestehen dagegen meist aus Kunststoff-basierten Materialien wie glasfaserverstärkte Kunststoffe (GFK), deren Reflektions- und somit Transmissionsverhalten für die verwendete elektromagnetische Strahlung anders ist. Bevorzugt werden zur Bestimmung des Einschaltzeitpunkts Radarstrahlen einer Frequenz zwischen 30 GHz und 300 GHz verwendet. The invention makes use of the fact that the driver's cab and the loading compartment of a truck are usually limited by metal walls. On the other hand, aerodynamic fairings at the transition between the driver's cab and the cargo area usually consist of plastic-based materials such as glass fiber reinforced plastics (GRP), whose reflection and thus transmission behavior is different for the electromagnetic radiation used. Radar beams of a frequency between 30 GHz and 300 GHz are preferably used to determine the switch-on time.
Bevorzugt wird mittels eines zusätzlichen Radarsensors die Geschwindigkeit eines sich vorbei bewegenden Lastkraftwagens ermittelt. Damit können aus Geschwindigkeitsschwankungen resultierende Verzerrungen bei der Bestimmung des Einschaltzeitpunkts korrigiert werden. Preferably, the speed of a truck moving past is determined by means of an additional radar sensor. In this way, distortions resulting from speed fluctuations can be corrected when determining the switch-on time.
Nachfolgend wird die Erfindung anhand vereinfacht dargestellter Ausführungsbeispiele näher erläutert. Dabei zeigen The invention will be explained in more detail with reference to exemplary embodiments shown in simplified form. Show
Figur 1 grob schematisch die Seitenansicht eines Figure 1 roughly schematically the side view of a
Lastkraftwagens (LKW), die  Lorries (trucks), the
Figuren 2 und 3 in einer Draufsicht die Funktionsweise beim  Figures 2 and 3 in a plan view of the operation at
Transmissionsbetrieb, und die Figuren 4 und 5 die Funktionsweise beim Reflektionsbetrieb. Transmission operation, and Figures 4 and 5, the operation in the reflection mode.
In Figur 1 ist ein Lastkraftwagen dargestellt, der einen Laderaum 1 , eine Fahrerkabine 2 und einen Übergangsbereich 3 zwischen der Fahrerkabine 2 und dem Laderaum 1 enthält. Der Übergangsbereich 2 ist zur Verringerung des Luftwiderstands aerodynamisch verkleidet. Die aerodynamischen Verkleidungen bestehen aus kunststoffbasierten Materialien, beispielsweise glasfaserverstärkter Kunststoff (GFK), die optisch undurchlässig für elektromagnetische Strahlen im sichtbaren Bereich sind. FIG. 1 shows a lorry which contains a loading space 1, a driver's cab 2 and a transition area 3 between the driver's cab 2 and the loading space 1. The transition region 2 is aerodynamically lined to reduce drag. The aerodynamic panels are made of plastic-based materials, such as glass fiber reinforced plastic (GRP), which are optically opaque to electromagnetic radiation in the visible range.
Zur Überprüfung des Lastkraftwagens auf verdächtige Güter (Waffen, Sprengstoffe, Schmuggelware etc.) wird dieser durch eine Röntgenprüfanlage bewegt, wie sie beispielsweise in der DE 101 22 279 A1 beschrieben ist. Die nicht in der Zeichnung dargestellte Röntgenprüfanlage enthält eine Röntgenquelle und eine auf die Röntgenquelle ausgerichtete Detektoranordnung, zwischen denen sich ein Fahrweg für den Lastkraftwagen befindet. Damit auch Container aus Metall zur Überprüfung durchstrahlt werden können, gibt die Röntgenquelle Röntgenstrahlen mit ausreichend hoher Energie von mehr als 1 MeV ab. To check the truck for suspicious goods (weapons, explosives, contraband, etc.) this is moved through an X-ray inspection, as described for example in DE 101 22 279 A1. The X-ray inspection system, not shown in the drawing, contains an X-ray source and a detector arrangement, which is aligned with the X-ray source, and between which there is a route for the truck. So that containers made of metal can be irradiated for checking, the X-ray source emit X-rays with a sufficiently high energy of more than 1 MeV.
Bevorzugt fährt der Lastkraftwagen selbsttätig durch die Röntgenprüfanlage. Der Fahrer fährt somit den Lastkraftwagen auf dem Fahrweg zwischen der stillstehenden Röntgenquelle und der stillstehenden Detektoranordnung an diesen vorbei. Zum Schutz des Fahrers ist es erforderlich, dass die Röntgenquelle ausgeschaltet ist, während die Fahrerkabine sich an ihr vorbeibewegt. Unmittelbar nachdem die Fahrerkabine den Strahlbereich passiert hat, muss die Röntgenquelle eingeschaltet werden, damit auch der Anfang des Laderaums geprüft wird. Zur Bestimmung des Einschaltzeitpunkts der Röntgenquelle wird der Lastkraftwagen an einer Seite mit elektromagnetischen Strahlen der Frequenz zwischen 1 GHz und 1 THz bestrahlt, bis der Übergangsbereich zwischen der Fahrerkabine und dem Laderaum detektiert wird und somit sicher die Fahrerkabine passiert hat. Zur Detektion wird die am Übergang zwischen der Fahrerkabine und dem Laderaum durchtretende oder reflektierte elektromagnetische Strahlung gemessen. Bevorzugt erfolgt die Bestrahlung mit Radarstrahlung einer Frequenz zwischen 20 GHz und 300 GHz. Diese Strahlung kann das Kunststoffmaterial einer Verkleidung durchdringen, während sie für Bauteile aus Metall undurchdringlich ist. Preferably, the truck drives automatically through the X-ray inspection. The driver thus drives the truck on the route between the stationary X-ray source and the stationary detector array past them. To protect the driver, it is necessary for the X-ray source to be switched off while the driver's cab is passing by. Immediately after the cab passes the beam area, the X-ray source must be turned on to check the beginning of the hold. To determine the turn-on of the X-ray source of the truck is irradiated on one side with electromagnetic radiation of the frequency between 1 GHz and 1 THz until the transition region between the cab and the cargo space is detected and thus safely passed the cab. For detection, the electromagnetic radiation passing or reflected at the transition between the driver's cab and the load compartment is measured. Preferably, the irradiation with radar radiation of a frequency between 20 GHz and 300 GHz. This radiation can penetrate the plastic material of a panel while being impermeable to metal components.
Die Detektionssysteme werden dabei entweder im Transmissionsbetrieb (Figur 2, Figur 3) oder im Reflektionsbetrieb (Figur 4, Figur 5) betrieben. Beim Transmissionsbetrieb ist eine Sendeeinheit 4 an einer Seite des Fahrwegs angeordnet. Auf der anderen Seite des Fahrwegs befindet sich eine Empfangseinheit 5, die zum Empfang transmittierter Strahlung, die den Lastkraftwagen durchdrungen hat, auf die Empfangseinheit 5 ausgerichtet ist. The detection systems are operated either in transmission mode (FIG. 2, FIG. 3) or in reflection mode (FIG. 4, FIG. 5). In the transmission mode, a transmission unit 4 is arranged on one side of the travel path. On the other side of the travel path there is a receiving unit 5, which is aligned with the receiving unit 5 for receiving transmitted radiation which has penetrated the truck.
Solange sich die Fahrerkabine 2 zwischen der Sendeeinheit 4 und der Empfangseinheit 5 befindet, ist die von der Empfangseinheit 5 empfangene Leistung sehr gering. Sobald der Übergangsbereich 2 des Lastkraftwagens sich in den Strahlenbereich bewegt, steigt die empfangene Leistung deutlich an. Dieses Ansteigen ist ein deutliches Zeichen, dass die Fahrerkabine 2 sich vorbeibewegt hat und nun der Laderaum 1 in den Strahlengang der Röntgenquelle eintritt. Die Röntgenquelle kann daher eingeschaltet werden, um den Laderaum 1 zu überprüfen. Bei einer Anlage nach den Figuren 4 und 5, die für einen Reflektionsbetrieb konzipiert ist, ist an einer Seite eine Sende- und Empfangseinheit 6 für die elektromagnetische Strahlung angeordnet. Die empfangene Leistung ist hoch, solange Strahlung von der metallischen Fahrerkabine 2 reflektiert wird. As long as the driver's cab 2 is located between the transmitting unit 4 and the receiving unit 5, the power received by the receiving unit 5 is very low. As soon as the transitional area 2 of the truck moves into the beam area, the received power increases significantly. This increase is a clear sign that the driver's cab 2 has moved past and now the cargo space 1 enters the beam path of the X-ray source. The X-ray source can therefore be turned on to check the cargo space 1. In a system according to FIGS. 4 and 5, which is designed for a reflection mode, a transmitting and receiving unit 6 for the electromagnetic radiation is arranged on one side. The received power is high as long as radiation from the metallic cab 2 is reflected.
Sobald der Übergangsbereich zwischen Fahrerkabine 2 und Laderaum 1 in den Strahlengang eintritt, sinkt die empfangene Reflektionsleistung deutlich ab. Wie in Figur 5 dargestellt, lässt die kunststoffbasierte Verkleidung des Lastkraftwagens im Übergangsbereich 3 den überwiegenden Anteil der Strahlung durchtreten ohne sie zu reflektieren. Sobald daraufhin die empfangene Leistung deutlich absinkt, kann die Röntgenstrahlung eingeschaltet werden, da sich die Fahrerkabine 2 nicht mehr im Strahlengang der Röntgenstrahlung befindet. As soon as the transition region between the driver's cab 2 and the loading space 1 enters the beam path, the received reflection power drops markedly. As shown in FIG. 5, the plastic-based lining of the truck in the transition region 3 allows the predominant portion of the radiation to pass through without reflecting it. As soon as then the received power drops significantly, the X-ray radiation can be switched on because the driver's cab 2 is no longer in the beam path of the X-radiation.
Um durch Geschwindigkeitsschwankungen des Lastkraftwagens bedingte Verzerrungen beim Empfang der transmittierten oder reflektierten elektromagnetischen Strahlen korrigieren zu können, ist bevorzugt in der Röntgenprüfanlage ein zusätzlicher Radarsensor angeordnet, der die Geschwindigkeit des sie vorbei bewegenden Lastkraftwagens ermittelt. In order to be able to correct distortions caused by speed fluctuations of the truck when receiving the transmitted or reflected electromagnetic beams, an additional radar sensor is preferably arranged in the X-ray inspection system, which determines the speed of the truck passing them.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1 . 1 .
Verfahren zur Überprüfung des Laderaums (1 ) eines Lastkraftwagens, bei dem der Lastkraftwagen an einer Röntgenquelle vorbei bewegt wird, die eingeschaltet ist, während der Laderaum (1 ) vorbeibewegt wird, und die ausgeschaltet ist, während die Fahrerkabine (3) vorbeibewegt wird, dadurch gekennzeichnet, dass zur Bestimmung des Einschaltzeitpunkts der Röntgenquelle der Lastkraftwagen mit elektromagnetischen Strahlen mit der Frequenz zwischen 1 GHz und 1 THz bestrahlt wird und die am Übergang (3) zwischen der Fahrerkabine (2) und dem Laderaum (1 ) durchtretende oder reflektierte elektromagnetische Strahlung gemessen wird.  A method of inspecting the cargo space (1) of a truck by moving the truck past an X-ray source which is turned on while the cargo space (1) is being passed and which is turned off while the driver's cab (3) is being passed characterized in that for determining the switch-on of the X-ray source of the truck is irradiated with electromagnetic radiation having the frequency between 1 GHz and 1 THz and at the transition (3) between the cab (2) and the load compartment (1) passing or reflected electromagnetic radiation measured becomes.
2. Second
Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als elektromagnetische Strahlen Radarstrahlen einer Frequenz zwischen 20 GHz und 300 GHz verwendet werden.  A method according to claim 1, characterized in that are used as electromagnetic radiation radar beams of a frequency between 20 GHz and 300 GHz.
3. Third
Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mittels eines Radarsensors die Geschwindigkeit des sich vorbei bewegenden Lastkraftwagens bestimmt wird. A method according to claim 1 or 2, characterized in that the speed of the truck moving past is determined by means of a radar sensor.
4. 4th
Vorrichtung zur Durchführung eines Verfahrens gemäß den Patentansprüchen 1 bis 3 mit zumindest einer Röntgenquelle und einer auf die Röntgenquelle ausgerichteten Detektoranordnung, zwischen denen sich ein Fahrweg für einen Lastkraftwagen befindet, dadurch gekennzeichnet, dass an einer Seite des Fahrwegs eine auf einen vorbei bewegten Lastkraftwagen ausgerichtete Quelle (4, 6) für elektromagnetische Strahlen mit einer Frequenz zwischen 10 GHz und 1 THz angeordnet ist und sich auf derselben und / oder der anderen Seite des Fahrwegs ein auf die Quelle ausgerichteter Sensor (5, 6) zum Empfang transmittierter oder reflektierter Strahlung befindet.  Apparatus for carrying out a method according to claims 1 to 3, having at least one X-ray source and a detector arrangement aligned with the X-ray source, between which there is a track for a truck, characterized in that on one side of the track a source oriented on a truck moving past (4, 6) is arranged for electromagnetic radiation with a frequency between 10 GHz and 1 THz and is located on the same and / or the other side of the track a source-oriented sensor (5, 6) for receiving transmitted or reflected radiation.
5. 5th
Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Strahlenquelle elektromagnetische Strahlung einer Frequenz zwischen 20 GHz und 300 GHz abgibt.  Apparatus according to claim 4, characterized in that the radiation source emits electromagnetic radiation of a frequency between 20 GHz and 300 GHz.
6. 6th
Vorrichtung nach Anspruch 4 oder 5, gekennzeichnet durch einen Radarsensor zur Bestimmung der Geschwindigkeit eines vorbeibewegten Lastkraftwagens.  Apparatus according to claim 4 or 5, characterized by a radar sensor for determining the speed of a passing truck.
EP13703800.6A 2012-02-10 2013-02-08 Method and device for inspecting the cargo space of a truck Withdrawn EP2812735A2 (en)

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US20140348294A1 (en) 2014-11-27
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WO2013117695A2 (en) 2013-08-15
EP2812736A2 (en) 2014-12-17
US20140348295A1 (en) 2014-11-27

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