JP3387760B2 - X-ray luggage inspection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray baggage inspection apparatus used at airports and harbors, and more particularly to an X-ray baggage inspection apparatus capable of increasing the amount of inspection processing. It is. 2. Description of the Related Art FIG. 10 shows a conventional X-ray baggage inspection apparatus used for baggage inspection at airports, harbors and the like. FIG.
As shown in FIG. 0, the conventional apparatus is configured so that a load 4 to be inspected on a load transporting device, for example, a belt conveyor device 5 moves between the X-ray source 1 and the X-ray detector 6 facing the X-ray source 1. It is configured. The X-ray flux 2 radiated from the X-ray source 1 passes through a moving baggage 4 and is detected by an X-ray detector 6 as an electric signal (X).
(A line transmission signal). In the X-ray detector 6, 480 X-ray detection elements are arranged in a straight line intersecting in the baggage transport direction A, and an X-ray transmission signal of 480 channels can be obtained. The 480-channel X-ray transmission signal is input to an image processing device 24 having an image storage device, and is subjected to correction processing such as A / D conversion and offset correction. Be recorded. The storage area of the image storage device is, for example, 512 × as shown in FIG.
It is 1024 × 8 bits (8 bits are a density data part). The line data 27 for 480 channels recorded in the image storage device is D / A converted and input to the television monitor 14 to display a linear X-ray fluoroscopic image.
At this time, since the baggage 4 is moved by the belt conveyor device 5, the line data for 480 channels is the surface data (FIG. 11).
Surface data of the middle TV monitor display area 26)
The images are displayed on the television monitor 14 as X-ray fluoroscopic images. The above-mentioned image storage device requires an area larger than the area that can be displayed on the television monitor 14, and the X-ray attenuation signal of the luggage 4 being conveyed one after another is constantly updated. The timing of writing and reading the X-ray attenuation signal is synchronized with the transport speed (conveyor speed) of the load 4 by the belt conveyor device 5 so that the X-ray fluoroscopic image of the load 4 (transparent load image) is not distorted. . Here, the conveyor speed is constant, and the timing setting is fixed.
The operation timing of the X-ray source 1 and the image processing device 24 is controlled by the control device 3. Light emitting device 22, light receiving device 2
Reference numeral 3 is used for controlling the X-ray generation timing by the control device 3. [0006] Such an X-ray baggage inspection apparatus is mainly installed at an airport, a harbor or a customs office, and performs a non-destructive inspection of the contents of the baggage 4. Hereinafter, a specific example of a baggage inspection procedure performed at an airport will be described. Will be described with reference to FIG. Passengers,
After boarding procedures, you will be inspected for carry-on baggage 4 at the inspection area. This test is often performed for tens of minutes.
The processing is continuously performed for 000 or more packages 4 (step 501). [0007] The surveillance inspector continuously operates the television monitor 14.
The presence or absence of a suspicious object is determined by looking at the luggage perspective image moving on the screen (step 502). If it is determined that there is no suspicious object, the baggage 4 is returned to the passenger (step 50).
8). If it is determined that there is a suspicious object, the warning hand switch for opening instruction is pressed and the warning buzzer sounds. Thus, when the baggage 4 arrives at the baggage exit of the apparatus main body, the opening inspector is notified that there is a suspicious object (step 504). The opening inspector places the baggage 4 on the opening table and obtains the consent of the owner (passenger) of the baggage 4 and
To check the contents of the luggage 4 for suspicious objects such as dangerous goods and drugs, which are considered to be contraband (step 50).
5). After the confirmation work, the contents considered to be suspicious are taken out and re-inspected (step 506), and if both (the contents and other things) are not suspicious, the baggage (the contents and other things) 4 to the passenger (Steps 507-
508). Further, there is a case where it cannot be determined depending on a hidden portion of the suspicious object. In such a case, the direction of the baggage 4 is changed, X-ray fluoroscopy is performed from a direction different from the previous time, and the inspection is performed again (steps 503, 501 to 507). . The proportion of this suspicious object varies depending on the airport, but about 10% of the total number of inspections
It is said that it is about. [0009] The above-mentioned conventional apparatus has the following problems. The degree of congestion at the baggage inspection area
Usually, it is determined by the large and small inspection processing amount of the baggage 4 and the degree of mixing of suspicious objects on the baggage perspective image. In addition, depending on the detection work performed by the metal detector in addition to the X-ray inspection, the owner (passenger) of the baggage 4 may not be able to receive the baggage 4 after the X-ray inspection. For these reasons, it has been conventionally desired to change the transport speed of the baggage 4 of the X-ray baggage inspection apparatus so that the inspection processing amount can be adjusted. In the above-mentioned conventional apparatus, the transport speed (conveyor speed) of the package 4 is constant, and the timing of writing and reading to and from the image storage device synchronized with the constant speed is fixedly set. Did not occur. However, if the transport speed of the load 4 changes, the load see-through image on the television monitor 14 is distorted. In particular, if the change is random, the image expands or contracts in the horizontal direction and is not displayed normally. There has been a problem that the accuracy of discriminating whether or not a suspicious object is visually observed on the television monitor 14 is greatly reduced. An object of the present invention is to prevent the perspective image of a load from being distorted even if the transport speed of the load changes, and therefore, to reduce the accuracy of discriminating whether or not the image is a suspicious object by visual inspection on a television monitor. An object of the present invention is to provide an X-ray baggage inspection apparatus that can easily change the inspection processing amount in accordance with the congestion of an inspection place, and particularly easily increase the inspection processing amount. The above object is achieved by providing an X-ray source,
An X-ray detector in which a plurality of X-ray detection elements for detecting X-rays emitted from the X-ray source are linearly arranged; and a package to be inspected is loaded with the X-ray source and the X-ray detector. A luggage transport device for moving the luggage so as to pass through, an image processing device for processing an x-ray fluoroscopic signal from the x-ray detector to display an x-ray fluoroscopic image of the luggage on a television monitor, An X-ray baggage inspection apparatus comprising: a radiation source and a control device for controlling operation timing of the image processing apparatus;
Speed changing means for variably setting the load carrying speed of the load carrying device, and means for correcting the image distortion of the X-ray fluoroscopic image of the load accompanying the change when the load carrying speed changes ;
At least the X-ray source and X-ray detector body
The pedestrian's walking speed along the luggage transport direction
Walking speed detecting means, and the walking speed detecting means
According to the detected speed,
It is accomplished by being changed. [0013] According to this, the luggage transport speed can be changed without causing distortion in the luggage perspective image, and the accuracy of discriminating whether or not the image is a suspicious object by visual inspection on the television monitor is not reduced.
It is possible to easily change the inspection processing amount according to the congestion at the inspection site, and particularly to increase the inspection processing amount for alleviating the congestion. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of an embodiment of an X-ray baggage inspection apparatus according to the present invention. In FIG. 1, 1, 2, 4, 6, 14, 22, 23 and 24 are the same as those in FIG. It is. 3 and 5 also show a control device and a belt conveyor device as in FIG. 10, respectively.
In addition to the functions of the conventional device shown in FIG. That is, in the belt conveyor device 5, the baggage transfer speed (conveyor speed) can be changed by manual operation of the speed changing means 25. Further, the control device 3 includes the above-mentioned speed changing means 25, and controls the belt conveyor device 5 according to the operation of the speed changing means 25 to change the conveyor speed. In this case, the speed changing means 25 may be configured using a changeover switch so that the conveyor speed can be changed stepwise, or may be configured using a variable resistor so that the conveyor speed can be continuously changed. Is also good. Furthermore,
When the conveyor speed changes, the control device 3 controls the image processing device 24 so as to correct the image distortion of the X-ray fluoroscopic image of the load 4 (the load fluoroscopic image) accompanying the change. Next, the operation of the apparatus of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. FIG. 2 is a view showing a specific example of a main part of the apparatus of the present invention shown in FIG. 1, that is, a part for correcting image distortion and X-ray sensitivity due to a change in the load carrying speed, which is the same as FIG. Or, corresponding parts are denoted by the same reference numerals. As shown in FIG. 2, the apparatus of the present invention comprises a baggage conveying device, for example, a baggage 4 to be inspected on a belt conveyor device 5 in which an X-ray source 1 and an X-ray detector 6 facing the same.
It is configured to move between. The X-ray flux 2 emitted from the X-ray source 1 passes through the moving luggage 4 and is converted into an electric signal (X-ray transmission signal) by the X-ray detector 6. The X-ray detector 6 is composed of a phosphor for converting X-rays into light and a photodiode array. Among these, the photodiode array includes a large number of photodiodes constituting one pixel (one channel).
For example, 480 pieces are arranged in a straight line, and each converts light from a phosphor into an electric signal. The output signal (small X-ray attenuation signal) from the X-ray detector 6 is amplified by the amplifier 7. The 480 signals are switched by the multiplexer 8 and sent to the A / D converter 9 to be converted into digital signals. The signal converted into a digital signal is stored in an image storage device 12 via a correction circuit 10 for performing offset correction, sensitivity correction, and the like, and an interface 11. In this case, the digital signal from the correction circuit 10 is developed into surface data on the image storage device 12 with the traveling operation of the belt conveyor device 5, and the X
A fluoroscopic image (a luggage fluoroscopic image) is formed, and its data is constantly updated. After the digital data on the image storage device 12 is read, it is D / A converted (converted into a television signal) by the D / A converter 13 and displayed on the television monitor 14 as a luggage perspective image. Here, if the conveyor speed (load transport speed) is constant, the image storage device 1 synchronized with the constant speed is used.
The timing for writing to and reading from 2 is not distorted once the luggage perspective image is set. However, when the conveyor speed changes, the luggage perspective image expands or contracts in the horizontal direction. In the apparatus of the present invention, the speed information is taken in from the control device 3 or the speed signal is taken out from the rotation of the drive shaft of the belt conveyor device 5 to detect the conveyor speed, and the change in the conveyor speed is detected. The timing of writing and reading to and from the image storage device 12 is controlled to follow, thereby eliminating image distortion of the luggage fluoroscopic image due to a change in the conveyor speed. That is, when the conveyor speed increases, the writing and reading timings to and from the image storage device 12 must be similarly advanced, because the X-ray attenuation signal of the sequentially conveyed packages 4 changes rapidly. The luggage perspective image shrinks in the horizontal direction. Conversely, when the conveyor speed decreases, the X-ray attenuation signal of the package 4 changes slowly, so that the package fluoroscopic image extends in the horizontal direction. As shown in FIG. 3, for example, the conveyor speed 1
2 m / min (= 200 mm / sec), one photodiode (1
In the case where the X-ray detector 6 in which the width of the channel (channel) is 2.1 mm and the photodiode rows of the 480 channels are arranged on a straight line, the timing (time interval) of writing and reading to and from the image storage device 12 is determined by a conveyor. When synchronizing with the speed, 2.1 mm ÷ 200 mm / sec (12 m / min) = 10.5 mS (1) From this state, if the conveyor speed is 6 m /
When it is reduced to a minute, the luggage perspective image extends twice in the horizontal direction. In this case, the control device 3 determines that the conveyor speed is ２.
In order to eliminate the distortion (elongation) of the baggage fluoroscopic image due to the detection, the timing of writing and reading to and from the image storage device 12 is twice (=
21.0 mS). Conversely, when the conveyor speed increases twice, the luggage see-through image shrinks by half in the horizontal direction. In this case, the control device 3 detects that the conveyor speed has doubled, and in order to eliminate the distortion (shrinkage) of the baggage fluoroscopic image due to the double speed, the control device 3 determines the timing of writing and reading to and from the image storage device 12 up to that time. One half of the value (= 5.25
mS). As described above, the control device 3 detects the conveyor speed, controls the timing of writing and reading to the image storage device 12 to follow the change in the conveyor speed, and eliminates the distortion of the baggage perspective image. When amplifying a small X-ray attenuation signal (output signal) from the X-ray generator 6, the amplifier 7 generally employs an IV (current / voltage conversion) method and an integration method. Can be The above example is an example in which an IV (current / voltage conversion) method is adopted. In the IV method, one amplifier is assigned to one X-ray detection element (photodiode) 6a of the X-ray detector 6. In the integration method, as shown in FIG. 4, a plurality of, in the illustrated example, two X-ray detection elements 6a within a predetermined range of the element array of the X-ray detector 6 are controlled by an analog switch 30 which is sequentially switched and controlled. Switch, and take out each output signal sequentially
Since the signal can be amplified by one amplifying unit 7a, the number of amplifying units 7a constituting the amplifier 7 can be reduced, and the configuration can be made inexpensively. Also in the present invention, the above-mentioned integration system can be applied as an amplification system of the amplifier 7, and this will be described below with reference to FIG. That is, in the integration method, the magnitude of the amplified output voltage V is determined by the product of the current i flowing through the X-ray detection element 6a and its integration time,
If the integration time is short, sufficient sensitivity cannot be obtained. In particular, when the conveyor speed (load transport speed) increases, the speed across the X-ray detection element 6a also increases, so that it is not possible to take a long integration time. As described above, in the conventional apparatus, since the conveyor speed was constant, the integration time was constant. In the present invention, the timing of writing and reading to and from the image storage device 12 is controlled so as to eliminate image distortion due to a change in the conveyor speed. That is, the composition speed of one image changes, and therefore, when the conveyor speed changes, the X-ray sensitivity changes. The rate of the change is as follows: V = it (2) (V: output voltage, i: minute current flowing through the X-ray detection element 6a, t: integration time). In this case, in order to obtain a constant X-ray sensitivity irrespective of the change in the conveyor speed, the X-ray condition, for example, the tube current or the tube voltage is changed in accordance with the change rate of the integration time t to change the X-ray sensitivity. May be corrected. Reference numeral 31 in FIG. 4 denotes an X-ray condition, in this case, a control line of the tube current (the same applies to a two-dot chain line extending from the control device 3 to the X-ray source 1 in FIG. 2). When the integration method is applied,
The control device 3 performs not only the following control of the writing and reading timings but also the following control of the X-ray condition for the change of the conveyor speed, for example, the tube current or the tube voltage, here the tube current. For example, when the conveyor speed increases twice, the integration time t decreases by half and the X-ray sensitivity (V) also increases by two.
It is reduced by a factor of one. In this case, the control device 3 sets the tube current to 2
The sensitivity is compensated by doubling the minute current i flowing through the X-ray detection element 6a. Conversely, the conveyor speed is reduced by half
, The integration time t increases twice and the X-ray sensitivity (V) also doubles. In this case, the control device 3 reduces the tube current by half, reduces the minute current i flowing to the X-ray detection element 6a by half, and lowers the sensitivity. As described above, the control device 3 detects the conveyor speed, performs X-ray conditions such as tube current or tube voltage follow-up control in response to the change, and removes the above-described image distortion and also adjusts the X-ray sensitivity. It also holds. If the gain of the amplifier 7a of the amplifier 7 can be controlled to increase or decrease, the control device controls the X-ray sensitivity so as to maintain the X-ray sensitivity by following the gain with respect to a change in the conveyor speed. 3 may be configured. FIG. 5 is a perspective view showing an example of the arrangement configuration of the above-mentioned entirety of the apparatus of the present invention. In FIG. 5, reference numeral 41 denotes an apparatus main body containing the X-ray source 1, the X-ray detector 6, the image processing device 24 (see FIG. 1), etc., 14a a monitoring monitor, 14b an opening monitor, and 16a an entrance roller. Conveyor, 16b: roller conveyor for exit, 17: monitoring monitor table, 18
Is a controller provided with the speed changing means 25; 19 is an alarm hand switch; 20 is an alarm image storage device;
1 is a launch table. In addition, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts. Hereinafter, a specific example of the baggage inspection procedure using the above-described apparatus of the present invention will be described with reference to FIG. After completing the boarding procedure, the passenger undergoes an inspection of the carry-on baggage 4 at the inspection site. This inspection is performed continuously (step 101).
The monitoring inspector adjusts and sets the conveyor speed in order to control the amount of inspection processing according to the number of flights taking off and landing on the airplane and the inspection system at that time (whether or not to perform strict inspection) (step 102). The surveillance inspector judges the presence or absence of a suspicious object by looking at the X-ray fluoroscopic image (luggage fluoroscopic image) of the luggage 4 continuously moving on the screen of the monitoring monitor 14a (step 103). If you determine that there is no suspicious object,
Is returned to the passenger (step 112). Monitoring monitor 1
If it is determined that there is a suspicious object on the screen of 4a, the time displayed on the screen of the monitoring monitor 14a is lengthened, and the conveyor speed is reduced to facilitate the determination (step 105). In order to make the conveyor speed variable, for example, there is a method in which an inverter motor is used as a drive source of the belt conveyor device 5. By using the inverter motor, the conveyor speed can be kept constant without changing the gear ratio of the motor due to the difference between the power supply frequencies of 50 Hz and 60 Hz. When the surveillance inspector determines that there is a suspicious object, he pushes the alarm hand switch 19 for instructing opening, and sounds the alarm buzzer. As a result, the package 4 is
When the vehicle arrives at the exit, the revealing inspector is notified that there is a suspicious object (step 106). When the alarm hand switch 19 is pressed, the luggage perspective image and the ALARM number displayed on the monitoring monitor 14a are also recorded in the alarm image storage device 20. Hereinafter, the luggage fluoroscopic image recorded in the alarm image storage device 20 is referred to as an alarm image. FIG. 7 is a diagram showing an alarm image recorded in the alarm image storage device 20 and a display example thereof. A plurality of alarm images (files) recorded in the alarm image storage device 20 can be searched by ALARM number. In the illustrated display example 1, one alarm image is displayed on the entire screen of the opening monitor 14b. However, considering the trouble of searching after image recording in the continuous inspection process, the opening monitor 14b as in the display example 2 is considered. When a plurality of, in this case, four alarm images are displayed on the screen simultaneously, the search for the image file can be omitted and the checking operation can be performed quickly. The ALARM number counts up each time the alarm hand switch 19 is pressed. In addition to the ALARM number, the date and time, the place where the suspicious
If information such as the ID number of the monitoring inspector is added to the alarm image and recorded, the efficiency of the uncovering operation is further improved. If the opening monitor 14b is used not only for retrieving and displaying an image file from the alarm image storage device 20 but also for displaying the same image as the monitoring monitor 14a, the inspected inspector can also monitor as the monitoring inspector. It can also be used for work and for the inspected inspector to provide guidance on monitoring work. Returning to FIG. 6, when the inspection inspector arrives at the baggage exit of the apparatus body 41 when the luggage 4 judged by the monitoring inspector to have a suspicious object, an alarm buzzer sounds and the luggage 4
Is placed on the opening table 21 and the owner (passenger) of the luggage 4 is approved and the luggage 4 is unveiled to check the contents considered to be contraband such as dangerous goods and drugs (step 108). ). In the conventional apparatus, what the suspicious object is and where it is in the baggage 4 is orally received from the monitoring inspector, and the opening inspector performs the opening operation. Opening work can be performed while looking at the luggage perspective image that is displayed. In the meantime, in the case of continuously inspecting the luggage 4 or the like in which a suspicious object is not mixed, the conveyor speed is increased to increase the inspection processing amount (step 109). After opening and confirming the luggage 4 with a suspicious object,
The contents considered to be the suspicious object are taken out and re-examined (Step 110), and if both (the contents and the other objects) are not suspicious objects, the baggage (the contents and the other objects) 4 is returned to the passenger. (Steps 111 to 112). In addition, depending on the location where the suspicious object is hidden, it may not be possible to determine the presence or absence of the suspicious object. In such a case, the direction of the baggage 4 is changed, X-ray fluoroscopy is performed from a different direction from the previous time, and the alarm images are compared. Re-examined by comprehensive judgment (steps 104, 101-
111). In the above-described example, the change of the conveyor speed (package transfer speed) is performed by the speed changing means 25 by manual operation such as a changeover switch, but may be automated as follows. That is, a pedestrian along the luggage transport direction a on the side of the device body 41 (the checked baggage 4 is being inspected, and after the inspection, the pedestrian passes through the passage toward the exit side of the baggage 4 of the device body 41 to receive it. It is also possible to provide a walking speed detecting means for detecting the walking speed of the occupant, and change the conveyor speed according to the detected speed of the walking speed detecting means. FIG. 8 is an explanatory view of an example of the walking speed detecting means. In the drawing, reference numeral 91 denotes a pedestrian sensor attached to the side of the apparatus main body 41, 92 denotes a pedestrian (passenger), 4B shows the walking direction of the pedestrian 92. The pedestrian sensors 91... Detect the pedestrian 92 and send a signal thereof to a walking speed detecting means calculation unit (not shown). The walking speed detecting means calculating section calculates the walking speed thereby, and calculates the walking speed.
To adjust the conveyor speed to the walking speed of the pedestrian 92. If the walking speed of the pedestrian (passenger) 92 is faster or slower than the conveyor speed, the apparatus body 4
At the luggage exit side, one's own luggage 4 (see FIG. 1) may not be found, which may be anxious. In the above example, the conveyor speed is synchronized with the walking speed of the pedestrian 92, so that the user's own baggage 4 can be found immediately at the baggage exit side of the apparatus main body 41, and anxiety does not occur. According to the above example, the amount of inspection processing is reduced.
When there is an inconvenience, the change of the conveyor speed can be selected by a switch or the like (not shown) between a case where the change is based on the detection speed (automatic) of the walking speed detection unit and a case where the change is based on the manual operation of the speed change unit 25. do it. FIG. 8
Reference numeral 93 denotes an emergency stop sensor. When the pedestrian 92 approaches the baggage entrance or exit of the apparatus main body 41, the apparatus (the X-ray source 1, the belt conveyor device 5 and the like) is emergency stopped, and the pedestrian 92 is stopped. This is to ensure safety. The display format of the alarm image is not limited to the example shown in FIG. For example, in a case where a plurality of alarm images are simultaneously divided and displayed on the screen of the opening monitor 14b, the images to be simultaneously displayed are not uniform in size as shown in FIG. 7 but one (alarm image 101) as shown in FIG. Larger size, other multiple images (alarm images 102-1
09) may be smaller and uniform. In this case, it is needless to say that an arbitrary image, for example, the image 102 among the small-sized images 102 to 109 may be rewritten and displayed in a large size. As described above, according to the present invention, even if the transport speed of the load changes, the load see-through image does not become distorted. There is an effect that it is easy to change the inspection processing amount in response to the congestion of the inspection site, and particularly to easily increase the inspection processing amount without lowering the determination accuracy of the determination. Further, according to the change of the conveyor speed according to the walking speed of the passenger who left the luggage for inspection, the luggage is also reduced as the occupant arrives at the luggage exit side of the apparatus body. Since the baggage is conveyed to the vicinity of the baggage exit, the user can find his / her baggage immediately at the baggage exit side, which has the effect of helping the passengers who have checked in the baggage to eliminate anxiety.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a main part of an embodiment of the device of the present invention. FIG. 2 is a diagram showing a specific example of a main part of the apparatus of the present invention shown in FIG. FIG. 3 is an explanatory diagram of a conveyor speed and a writing timing to an image storage device in the apparatus of the present invention. FIG. 4 shows the X corresponding to the conveyor speed in the apparatus of the present invention.
FIG. 9 is an explanatory diagram of linear sensitivity correction. FIG. 5 is a perspective view showing an example of the arrangement configuration of the entire device of the present invention. FIG. 6 is a flowchart showing a specific example of a baggage inspection procedure by the apparatus of the present invention. FIG. 7 is a diagram showing an alarm image recorded in an alarm image storage device and a display example thereof. FIG. 8 is an explanatory diagram of another example of changing the conveyor speed of the apparatus of the present invention. FIG. 9 is a diagram showing another display example of the alarm image recorded in the alarm image storage device. FIG. 10 is a configuration diagram showing a main part of a conventional device. FIG. 11 is an explanatory diagram of a storage area of an image storage device that records a package perspective image. FIG. 12 is a flowchart showing an inspection procedure by a conventional apparatus. [Description of Signs] 1. X-ray source, 2. X-ray flux, 3. Control device, 4. Luggage, 5
... Belt conveyor device (baggage transport device), 6 ... X-ray detector, 6a ... X-ray detecting element, 7 ... Amplifier, 8 ... Mux, 9 ... A / D converter, 10 ... Correction circuit, 11 ... Interface, 12 ... Image storage device, 13 ... D / A converter, 14 ... TV monitor, 14a ... Monitor monitor, 14b
... Opening monitor, 15 ... Conveyor speed signal, 16a ... Roller conveyor for entrance, 16b ... Roller conveyor for exit,
17: monitoring monitor table, 18: controller, 19
... alarm hand switch, 20 ... alarm image storage device,
21 ... opening table, 22 ... light emitting device, 23 ... light receiving device, 2
4 image processing apparatus, 25 speed changing means, 26 TV monitor display area, 27 line data, 28 storage area, 3
0: analog switch, 31: tube current control line, 41: device body, 91: pedestrian sensor, 92: pedestrian (passenger), 93: emergency stop sensor, 101 to 109: alarm image.

Claims (1)

(57) Claims 1. An X-ray source and X-rays radiated from the X-ray source.
An X-ray detector in which a plurality of X-ray detection elements for detecting X-rays are arranged, and a luggage transport device for moving a luggage to be inspected so as to pass between the X-ray source and the X-ray detector When,
An image processing apparatus for processing X-ray fluoroscopic signals sequentially detected by the X-ray detector and displaying an X-ray fluoroscopic image of the package on a television monitor, and controlling at least the operation timing of the X-ray source and the image processing apparatus An X-ray baggage inspection device comprising: a speed change unit for variably setting a baggage transfer speed of the baggage transfer device; and an X-ray fluoroscopy of the baggage accompanying the change when the load transfer speed changes. Means for correcting image distortion of the image ;
At least the X-ray source and X-ray detector body
The pedestrian's walking speed along the luggage transport direction
Walking speed detecting means, and the speed change is performed according to the detected speed of the walking speed detecting means.
An X-ray baggage inspection device characterized in that the baggage transport speed of the means is changed .