WO2001077653A1 - X-ray inspection system - Google Patents
X-ray inspection system Download PDFInfo
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- WO2001077653A1 WO2001077653A1 PCT/JP2001/002989 JP0102989W WO0177653A1 WO 2001077653 A1 WO2001077653 A1 WO 2001077653A1 JP 0102989 W JP0102989 W JP 0102989W WO 0177653 A1 WO0177653 A1 WO 0177653A1
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- ray
- inspection system
- image
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- output
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- 238000007689 inspection Methods 0.000 title claims abstract description 78
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- 230000004044 response Effects 0.000 claims abstract description 8
- 238000003384 imaging method Methods 0.000 claims description 37
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 15
- 230000001276 controlling effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/07—Investigating materials by wave or particle radiation secondary emission
- G01N2223/076—X-ray fluorescence
Definitions
- the present invention relates to an X-ray inspection system for inspecting an object to be measured based on an X-ray fluoroscopic image of the object to be moved at a predetermined speed, and particularly to an in-line inspection system for inspecting an object to be transported by a belt conveyor or the like.
- the present invention relates to a device used for a nondestructive inspection device.
- an X-ray inspection system using X-rays has been known as a system for non-destructively inspecting an internal state of an object to be measured.
- the X-ray inspection system irradiates the object with X-rays divergently output from one point of the X-ray source in a fixed angle direction, and images the X-rays transmitted through the object with an X-ray imager. Inspection of the internal state and the like of the object to be measured is carried out.
- an X-ray inspection system for inspecting a plurality of objects to be measured that are successively moving on a line such as a belt conveyor is disclosed in Japanese Patent Application Laid-Open No. H11-108858. It is disclosed in the gazette.
- the purpose of this X-ray inspection system is to obtain a clear X-ray fluoroscopic image in X-ray imaging of a moving object to be measured. That is, when the device under test passes on a straight line connecting the X-ray source and the X-ray imager, a gate signal is transmitted to the X-ray imager, and the operation of the X-ray imager is controlled by the gate signal. Then, an X-ray fluoroscopic image was taken at the moment when the object to be measured crossed between the X-ray source and the X-ray imager.
- the X-ray inspection system had a problem in sensitivity.
- the imaging time of the X-ray imager it is necessary to reduce the imaging time of the X-ray imager to obtain the required resolution, but if the imaging time is reduced, the X-ray The amount of transmitted X-rays received by the imager was reduced, resulting in a decrease in sensitivity.
- the present invention solves the above-mentioned problems, and provides a method for X-ray imaging of a moving object to be measured. And to provide an x-ray inspection system that can achieve both the required resolution and sufficient sensitivity.
- An X-ray inspection system includes: an X-ray source that irradiates a moving object with X-rays; An X-ray imager having a conversion surface, and an output surface for receiving an electron image emitted from the X-ray electron conversion surface and outputting an X-ray fluoroscopic image of the DUT in response to the incident electron image; A position detecting means for detecting the position of the object to be measured, and, based on the position of the object to be detected detected by the position detecting means, the flow of the electron image from the X-ray electron conversion surface to the output surface is deflected and output. Deflecting means for forming an electronic image on a predetermined area on the surface.
- the traveling direction of the electron image converted and emitted by the X-ray electron conversion surface is deflected based on the position of the object to be measured. Can be done.
- an X-ray fluoroscopic image can be formed on a predetermined area of the output surface.
- the X-ray source may be a pulsed X-ray source that outputs X-rays when an object to be measured is within an imaging range of an X-ray imaging device.
- a pulsed X-ray source in this way, it is possible to reduce the amount of X-ray irradiation on a moving object to be measured. Further, if X-rays are output only when the object to be measured is within the imaging range, it is possible to suppress the output of X-rays that may adversely affect the human body and the like.
- the X-ray imager further includes an electrode that regulates a flow of an electron image toward the output surface by applying a voltage between the X-ray electron conversion surface and the output surface. It is good. By providing the electrodes for restricting the flow of the electron image toward the output surface, it is possible to control the imaging time of the object to be measured by the X-ray imaging device. Thereby, the resolution of the X-ray fluoroscopic image of the moving object to be measured can be improved.
- the X-ray imager further includes an electrode that regulates a flow of an electron image toward the output surface by applying a voltage between the X-ray electron conversion surface and the output surface.
- the regulation of the flow of the electron image is released after outputting the X-ray from the pulsed X-ray source, and the flow of the electron image is regulated before stopping the output of the X-ray from the pulsed X-ray source. good.
- the imager can be controlled so as not to capture images, and can capture images with stable X-rays.
- the X-ray source may be a point light source
- the output surface may be a fluorescent screen that emits fluorescence when an electron image is incident thereon.
- the position detecting means includes an object-to-be-measured detecting means for detecting the object-to-be-measured before reaching the imaging range of the X-ray imaging device.
- the position of the measured object within the imaging range may be obtained based on the elapsed time from the time when the measured object is detected.
- the object to be measured within the X-ray imaging range can be detected by detecting the object to be measured moving in a certain direction at a predetermined speed before reaching the X-ray imaging range. Can be easily calculated from the detection time and elapsed time.
- the device under test detection means includes one light emitting element for irradiating light to the object to be measured and two light receiving devices provided at different points and receiving light output from the light emitting device. And a distance between the light-emitting element and the movement path of the measured object is detected from a time interval at which light output from the light-emitting element to each light-receiving element is blocked by the measured object. good. In this way, the light output from one light-emitting element is received by two light-receiving elements provided at different points, and the time at which the device under test is detected by each light-receiving element is detected.
- the above-described X-ray inspection system is an X-ray inspection system including an X-ray source and an X-ray image imaging device that are arranged to face each other across the measured object passage path, wherein the X-ray image imaging device includes an X-ray electron conversion material and An X-ray imager is provided with an output phosphor screen facing the X-ray electron conversion material.
- the X-ray imager captures the electron image between the X-ray electron conversion material and the output phosphor screen at a speed synchronized with the moving speed of the DUT. It deflects the flow.
- the imaging time of the object to be measured P can be lengthened. However, both the required resolution and sufficient sensitivity can be achieved. Further, it is preferable that the above-described X-ray inspection system starts deflection in response to a predetermined trigger generated based on the position of the object to be measured.
- FIG. 1 is a block diagram showing the X-ray inspection system of the first embodiment.
- FIG. 2 is a cross-sectional view showing the X-ray gates II.
- Figures 3A, 3B, and 3C show changes in electron orbitals.
- FIG. 4 is a diagram showing the control of the current conducted to the deflection coil.
- FIG. 5 is a diagram for explaining a method of calculating a position by the position detecting means.
- FIG. 6 is a timing chart showing control by the timing circuit.
- FIG. 7 is a diagram showing signals at a pulse X-ray source, a deflection circuit, and X-ray gates I and I.
- FIG. 8 is a diagram specifically showing the relationship between the deflection distance and the exposure time.
- FIG. 9 is a block diagram showing an X-ray inspection system according to the second embodiment.
- FIG. 10 is a evening chart showing the control by the evening circuit.
- FIG. 11 is a diagram showing signals at a pulse X-ray source, a deflection circuit, and an X-ray gate.
- FIG. 12 is a block diagram showing an X-ray inspection system according to the third embodiment.
- FIG. 13 is a timing chart showing control by the timing circuit.
- FIG. 14 is a diagram showing signals at the pulse X-ray source, the deflection circuit, and the X-ray gate.
- Figure 15 is an explanatory diagram of the X-ray inspection system.
- Figure 16 is an explanatory diagram of the X-ray inspection system.
- FIG. 17 is a timing chart of the deflection current and the gate signal supplied to the X-ray inspection system X-ray gates I and I 40.
- FIG. 1 is a block diagram showing an X-ray inspection system 10 of the present embodiment.
- the X-ray inspection system 10 is used for inspecting a tablet (measurement object) P that is placed on a belt conveyor 12 and moves in a certain direction.
- the X-ray inspection system 10 is composed of a belt conveyor 12 that transports the loaded tablets P at a constant speed V, and a pulse X-ray source 14 that irradiates pulse X-rays toward the tablets P on the belt conveyor 12 X-ray gate image intensifier (hereinafter referred to as “X-ray gate I ⁇ I”) 40 facing the pulse X-ray source 14 across the belt conveyor 12 and X-ray gate I ⁇ 14
- a CCD camera 18 that captures the X-ray fluoroscopic image acquired by 0, and a processing determination device 28 that determines the quality of the tablet P based on the captured X-ray fluoroscopic image and performs processing such as sorting.
- a lens for imaging the X-ray fluoroscopic image acquired by the X-ray gate I • I 40 on the light-receiving part of the CCD camera 18 16 are provided.
- An object-to-be-measured detecting means 30 is provided upstream of the belt conveyor 12 in the imaging range where X-ray imaging is performed.
- the object-to-be-measured detecting means 30 is composed of a light emitting diode 32 emitting light toward the tablets P on the belt conveyor 12 and two photodiodes arranged in parallel with the belt conveyor 12 with the belt conveyor 12 interposed therebetween. It consists of 34, 36.
- the two photodiodes 34 and 36 are connected to the timing circuit 20. As a result, the timing circuit 20 moves at a constant speed V.
- the position of the tablet P can be calculated based on the time when the photodiodes 34 and 36 detected the tablet P and the time elapsed from the detection time.
- the timing circuit 20 includes an X-ray power supply 22 for controlling X-rays output from the pulse X-ray source 14 and an X-ray gate power supply 2 for opening and closing the gates of the X-ray gates I and I 40. 6 and a deflecting circuit 24 for controlling a deflecting coil 44 provided on the outer periphery of the X-ray gates I ⁇ I 40, and each operation timing is controlled by an evening timing signal.
- the deflection starts in synchronization with this arrival time, What is necessary is just to deflect the flow of the electron image in synchronization with the moving speed of P. That is, the output of the timing circuit 20 is a predetermined trigger generated based on the position of the tablet P, and the deflection is started in response to this trigger.
- FIG. 2 is a cross-sectional view showing the X-ray gates I and I40.
- the X-ray gate I • 140 has an X-ray electron conversion surface 42 that converts the incident X-ray image into an electron image, and an output fluorescent surface 46 that emits fluorescence when the electron image is incident. It is constituted by being sealed in a decompressed container 49. Further, an accelerating electrode 48 is provided on the inner periphery of the container 49, and by controlling the voltage applied to the accelerating electrode 48, the gate control of the X-ray gate I Can be done.
- the output phosphor screen 46 is set to a high potential, the electron image traveling from the X-ray electron conversion surface 42 to the output phosphor screen 46 is accelerated. Conversely, if the output phosphor screen 46 is set to a low potential, The flow of the electron image from the X-ray electron conversion surface 42 to the output fluorescent surface 46 is regulated. Next, the operation of the X-ray inspection system 10 will be described.
- the tablet P to be measured is placed on the belt conveyor 12 and moves at a constant speed V to the right in FIG.
- first light blocking time When the tablet P blocks the light output from the light emitting diode 32 to the first photodiode 34, the time (hereinafter, referred to as “first light blocking time”) is transferred from the first photodiode 34 to the timing circuit 20. Sent.
- second light-blocking time the time (hereinafter referred to as “second light-blocking time”) is transmitted from the second photodiode 36 to the timing circuit. Sent to 20.
- the timing circuit 20 detects the position of the tablet P based on the second light-shielding time transmitted from the second photodiode 36. That is, since the feed speed V of the belt conveyor 12 is determined in advance, the timing circuit 20 can calculate the current position of the tablet P based on the second light shielding time and the elapsed time from the second light shielding time. Wear. Then, based on this position information, that is, the elapsed time from the second light-shielding time, the timing circuit 20 outputs a timing signal to the pulse X-ray power supply 22, the deflection circuit 24, and the X-ray gate power supply 26. Control.
- FIGS. 3A, 3B, and 3C show the relationship between the deflection current to be conducted to the deflection coil 44 and the electron trajectory. I do.
- the deflection coil 44 is schematically shown inside the container 40 to clarify the direction of conduction of the deflection current, and the direction in which the tablet P moves is indicated by X.
- the Y-axis is the straight line connecting the center of the electron conversion surface 42, and the axis from the back of the paper to the front is the Z-axis.
- FIGS. 3A, 3B, and 3C are diagrams showing, in chronological order, a state in which the tablets P conveyed by the belt conveyor 12 pass through the origin 0.
- FIG. 3A, 3B, and 3C are diagrams showing, in chronological order, a state in which the tablets P conveyed by the belt conveyor 12 pass through the origin 0.
- the X-ray image transmitted through the tablet P is displayed on the X-ray electron conversion surface 42. It is incident on the negative area of the X axis.
- an X-ray image is incident on the X-ray electron conversion surface 42, an electron image is emitted from the X-ray electron conversion surface 42, and the emitted electron image is accelerated by the accelerating electrode 48 to the output fluorescent surface 46.
- a counterclockwise current in FIG. 3A is conducted to the deflection coil 44 as shown in FIG. 3A to generate a magnetic field B in the Z-axis direction.
- the electron image traveling from the X-ray electron conversion surface 42 to the output fluorescent surface 46 is The light is shifted in the X-axis direction due to the Moment of Lenz force from the magnetic field B, and is incident on almost the center of the output fluorescent screen 46.
- the transmission X-ray image of the tablet P becomes an X-ray. It is incident on the positive region of the X-axis on the electron conversion surface 42.
- the clockwise current in FIG. 3C is conducted to the deflecting coil 44 to generate a magnetic field B in the negative direction of the Z axis, thereby forming an electron image. Deflected in the negative direction of the X axis, and an electron image is made to enter almost the center of the output phosphor screen 46.
- the current flowing through the deflection coil 44 shall be + in the clockwise direction in Figs. 3A, 3B and 3C.
- the result is shown in Fig. 4. That is, a negative current is conducted to the deflection coil 44 at time t2, and the current is reduced as the tablet P approaches the origin 0. This is to reduce the amount of deflection as the tablet P approaches the origin 0.
- tablets
- the direction of the current is reversed, and thereafter, the current is controlled to increase as the tablet P moves away from the origin. Then, the current is set to 0 at time t6.
- the magnitude of the current conducted to the deflection coil 44 is such that the electron image output from the X-ray electron conversion surface 42 is deflected to form an X-ray fluoroscopic image at the center of the output fluorescent screen 46. That's it. Therefore, the amount of current conducted to the deflection coil 4 4 is
- the pulse X-ray source 14 is a point light source
- the position of the transmitted X-ray image projected on the X-ray electron conversion surface 42 is not only the position of the tablet P in the X-axis direction but also the Y-axis direction. Rank It also changes depending on the location.
- the position of the tablet P in the X-axis direction is calculated based on the elapsed time from the second light-shielding time. However, since the first light-shielding time is also obtained, the Y-axis of the tablet P is obtained. It is also possible to detect the position in the direction, that is, the distance from the pulse X-ray source 14, whereby the position and position of the X-ray image transmitted through the tablet P and incident on the X-ray electron conversion surface 42 are detected. You can calculate the moving speed. This will be described with reference to FIG. As shown in FIG.
- the positional relationship between the elements constituting the object-to-be-measured detecting means 30 is such that the first photodiode 34 and the second photodiode 36 move the tablet P at a distance d.
- the distance between the straight line connecting the light receiving surfaces of the two photodiodes 34 and 36 and the light emitting diode 32 is D.
- V, V x O / X ⁇ ⁇ '2
- V ⁇ / ⁇ t
- the position of the X-ray image transmitted through the tablet P and incident on the X-ray electron conversion surface 42 can also be calculated, and the amount of current conducted to the deflection coil 44 Can be controlled.
- the tablet P is projected on the output fluorescent screen 46 when passing through the origin 0.
- the X-ray fluoroscopic image must always enter the center of the output phosphor screen 46 During this time, the X-ray fluoroscopic image of the tablet P appears stationary at the center of the output phosphor screen 46.
- timing signals output from the timing circuit 20 to the X-ray power supply 22, the deflection circuit 24, and the X-ray gate power supply 26 will be described.
- the X-ray power supply 22, the deflection circuit 24, and the X-ray gate power supply 26 are all controlled based on the elapsed time from the second light shielding time t0.
- Figure 6 is a chart showing the timing.
- the tablet P is detected by the second photodiode 36 at time t0, and the signal 70 from the second photodiode 36 to the timing circuit 20 becomes ON. Since the feed speed V of the belt conveyor 12 is constant, the timing circuit 20 calculates a time t3 at which the tablet P enters the imaging range and a time t5 at which the tablet P deviates from the imaging range. When is within the imaging range, the timing signal 73 to the X-ray gate power supply 26 is turned on, that is, a voltage is applied by the accelerating electrode 48 so that the output fluorescent screen 46 becomes a high potential and the tablet P Imaging of the X-ray fluoroscopic image.
- the timing circuit 20 turns on the timing signal 71 from the timing circuit 20 to the X-ray power supply 22 at the time t1 before the time t3, and outputs the X-ray from the pulse X-ray source 14
- the timing signal 72 from the timing circuit 20 to the deflecting circuit 24 is turned on to conduct current to the deflecting coil 44.
- FIG. 7 shows a change in the X-ray intensity output from the pulse X-ray source 14 and a change in the current flowing through the deflection coil 44 at this time.
- the X-ray intensity 81 after being output from the pulse X-ray source 14 at time t1, rapidly rises, becomes almost stable near the maximum intensity of X-rays, and approaches time t7 when X-ray output stops. Fall.
- the amount of current 82 flowing through the deflection coil 44 causes deflection distortion near time t2 when the current starts to flow and time t6 when the current stops, but basically, the time from time t2 to time t2. It changes linearly with respect to the time axis until t6.
- the X-rays output from the pulsed X-ray source 14 are not completely pulsed, and there are rising and falling portions at the start and end of the X-ray output, and the current flowing through the deflection coil 44 Since the deflection distortion also occurs, accurate imaging is performed during this time. Can not do.
- the X-ray gates I and I 40 are used, and the current flowing through the pulse X-ray power supply 14 and the deflection coil 44 is in a stable state, that is, the X-ray gate is between time t3 and time t5.
- the gate of I ⁇ I 40 is opened to take X-ray fluoroscopic images of tablet P.
- the X-ray dose 83 incident on the X-ray gate I ⁇ 140 can be substantially pulsed.
- the deflection current 82 can avoid deflection distortion occurring at the beginning and end of deflection.
- the X-ray fluoroscopic images controlled by the X-ray gates I and I 40 as described above are captured by the CCD camera 18 and transmitted to the processing determination device 28.
- the processing determination device 28 performs processing such as sorting tablets P based on the captured X-ray fluoroscopic image.
- a deflection coil 44 is provided at the X-ray gates I and I 40 to deflect the trajectory of the electron image emitted from the X-ray electron conversion surface 42 so as to be positioned at the position of the tablet P. Instead, an image is formed almost at the center of the output phosphor screen 46. As a result, since the moving tablet P can be imaged while being stopped on the output phosphor screen 46, the exposure time can be secured even if the moving speed of the tablet P increases, and the sensitivity can be increased. Can be
- the tablet P is placed on the belt conveyor 12 and moves rightward in FIG. 8 at a speed of 1 (mZs). Since the tablet P is moving on a line that internally divides the pulse X-ray source 14 and the X-ray gate I ⁇ 140 into 1: 5, it is incident on the X-ray electron conversion surface 42 of the X-ray gate I ⁇ I 40 The penetrating X-ray image of tablet P moves to the right in Fig. 8 at a speed of 5 (m / s).
- the X-ray inspection system 10 is configured such that the transmitted X-ray image on the X-ray electron conversion surface 42 moves, for example, by 10 (mm) while the electron output from the X-ray electron conversion surface 42 moves. Can be deflected and kept stationary on the output phosphor screen 46. In effect,
- the X-ray inspection system 10 of the present embodiment can ensure both resolution and sensitivity when observing the tablet P having a high moving speed.
- the X-ray inspection system 50 of the second embodiment shown in FIG. 9 has the same basic configuration as the X-ray inspection system 10 of the first embodiment, except that the pulse X-ray source 14 is replaced by an X-ray. The difference is that source 52 is used.
- the X-ray source 52 is continuously turned ON, and the timing circuit 20 does not control the X-ray power supply 22 as shown in FIG. That is, an ON signal 71 is always input to the X-ray power supply 22 from a power supply circuit (not shown). Then, the timing circuit 20 turns on the timing signal 73 to the deflection circuit 24 at time t2, and then turns on the evening signal 74 to the X-ray gate power supply 26 at time t3 to perform imaging. I do. This facilitates the control by the timing circuit 20 and continuously outputs X-rays. Therefore, as shown in Fig. 11, a complete pulse X-ray is seen from the X-ray gate I • 140. Is obtained.
- the X-ray inspection system 60 of the third embodiment shown in FIG. 12 has the same basic configuration as the X-ray inspection system 10 of the first embodiment, but is replaced with X-ray gates I and I 4 °. The difference is that X-ray II 62 which does not have a gate function is used.
- the X-ray II 62 is continuously turned on, and the timing circuit 20 does not control the X-ray gate as shown in FIG. That is, an ON signal 73 is input to the X-ray gate power supply 26 from a power supply circuit (not shown).
- the timing circuit 20 turns on the timing signal 72 to the deflection circuit 24 at time t 11, and then turns on the timing signal 71 to the X-ray power supply 22 at time t 12.
- the control by the timing circuit 20 becomes easy, and the distortion of the deflection current 82 as shown in FIG. 14 can be avoided.
- a combination of one light emitting diode 32 and two photodiodes 34, 36 is used as the object detection means 30 for the tablet P, and the tablet P Is calculated, but the position is not limited to the above embodiment as long as the position of the tablet P can be detected.
- the tablet P may be photographed with a video camera, and the position of the tablet P passing through the imaging range may be analyzed.
- the device under test may be a combination of one light-emitting diode and one photodiode.
- the above-described X-ray inspection system is an X-ray inspection system including an X-ray source 14 and an X-ray image pickup device 40 (16, 18) which are arranged to face each other with the passage of the object P therebetween.
- the X-ray image pickup device 40 includes an X-ray electron conversion material 42 and an output fluorescent screen 46 disposed opposite to the X-ray electron conversion material 42. It deflects the flow of the electron image between the X-ray electron conversion material 40 and the output phosphor screen 46 at a speed synchronized with the moving speed of the electron beam.
- the X-ray electron conversion material 40 and the output phosphor screen are synchronized at the speed synchronized with the moving speed of the DUT P. Since the flow of the electron image is deflected between 46 and 46, the imaging time of the object P can be lengthened, and therefore, both the required resolution and sufficient sensitivity can be realized.
- the above-described X-ray inspection system starts deflection in response to a predetermined trigger generated based on the position of the object P to be measured. That is, since the time at which the object P arrives in the space between the X-ray source 14 and the X-ray imager 40 can be obtained, the deflection is started in synchronization with the arrival time, and the object under measurement is started. The flow of the electron image was deflected in synchronization with the moving speed of P.
- the output of the timing circuit 20 is a predetermined trigger generated based on the position of the device under test P, and the deflection is started in response to this trigger.
- the position of the object P is detected in a non-contact manner, and the trigger is generated based on the detected position.
- This may be configured to detect the position of the object P using physical contact, and to generate the trigger one based on the detected position.
- FIG. 15 is an explanatory diagram of the X-ray inspection system having such a configuration, and shows only the changes from the above-described embodiment.
- a configuration may be adopted in which a restraint means for restraining the position of the object to be measured and a release means for releasing the restraint are provided, and the trigger is generated after a lapse of a predetermined time from the release operation.
- FIG. 16 is an explanatory diagram of the X-ray inspection system having such a configuration, and shows only the changes from the above-described embodiment.
- the object to be measured P is restrained at a specific position on the belt conveyor 12 by restraining means (stopper STP and actuator ACT fixed to the stopper STP), and the actuator ACT moves upward. And the stopper is released, and functions as a releasing means.
- This release operation is performed by a trigger applied to the actuating controller ACT from the control controller SCT.
- the trigger is supplied to the X-ray gate I140 as a deflection signal via the delay circuit DLY. . Therefore, the trigger for starting the deflection is generated after a lapse of a predetermined time from the release operation. This predetermined time is calculated in advance based on the moving speed of the belt conveyor 12 and the distance to the shooting position.
- the configuration may be such that deflection is performed independently of the position of the object P to be measured.
- FIG. 17 is a timing chart of the deflection current and the gate signal supplied to the deflection coil 44 of the X-ray gate I ⁇ 140 of the X-ray inspection system having such a configuration.
- the difference from FIG. 1 is that the deflection is performed independently of the position of the DUT.
- the deflection current which was at the speed of the belt conveyor 12 (accurately, the speed of the X-ray image on the photoelectric surface of the X-ray gate II of the object P), was supplied to the deflection coil 44 as a deflection signal. However, you can always keep still images.
- the deflection current is a sawtooth wave.
- the gate signals of X-ray gates I and I40 are turned off.
- the gate signal is off, the output of the X-ray imager is prohibited. Thereby, a clearer image can be obtained.
- the output image can be captured either by moving the device under test P at the interval (1/30 second) or by setting the imaging time arbitrarily in accordance with the NTSC system (one frame per 1/30 second). Use a high-speed camera.
- the X-ray imaging device was provided with the CCD camera 18 arranged opposite to the output phosphor screen 46, but the position of the object P was measured by itself.
- the image may be detected by the image pickup mechanism, that is, the CCD camera 18.
- the video signal constituting the image changes. Therefore, this signal change is detected and the deflection is started.
- the time required for the measured object to reach the position where the image is captured at the center of the X-ray gates I and I 40 and the deflection speed synchronized with the movement can be calculated based on the movement speed of the belt conveyor 12.
- the trigger is generated when an operator who looks at the object P turns on a switch (corresponding to the timing circuit 20 in FIG. 1) for starting deflection. It may be that.
- the belt conveyor 112 is moved at a constant speed, but this may not be constant. That is, if the speed of the belt conveyor 112 is detected in real time by an encoder or the like, the above-described deflection can be performed in accordance with the moving speed of the workpiece P.
- the present invention relates to an X-ray inspection system for inspecting an object to be measured based on an X-ray fluoroscopic image of the object to be moved at a predetermined speed, and in particular, an inline non-destructive inspection for an object to be transported by a belt conveyor or the like. It can be used for inspection equipment.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01919808A EP1281953B1 (en) | 2000-04-06 | 2001-04-06 | X-ray inspection system |
AU2001246853A AU2001246853A1 (en) | 2000-04-06 | 2001-04-06 | X-ray inspection system |
US10/257,004 US6876722B2 (en) | 2000-04-06 | 2001-04-06 | X-ray inspection system |
JP2001574861A JP3513136B2 (ja) | 2000-04-06 | 2001-04-06 | X線検査システム |
US11/020,038 US7356117B2 (en) | 2000-04-06 | 2004-12-23 | X-ray inspection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-105225 | 2000-04-06 | ||
JP2000105225 | 2000-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001077653A1 true WO2001077653A1 (en) | 2001-10-18 |
Family
ID=18618632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/002989 WO2001077653A1 (en) | 2000-04-06 | 2001-04-06 | X-ray inspection system |
Country Status (5)
Country | Link |
---|---|
US (2) | US6876722B2 (ja) |
EP (1) | EP1281953B1 (ja) |
JP (1) | JP3513136B2 (ja) |
AU (1) | AU2001246853A1 (ja) |
WO (1) | WO2001077653A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803394B1 (fr) * | 1999-12-30 | 2003-04-25 | Thomson Tubes Electroniques | Systeme de detection d'image radiologique pour generateur de rayons x a balayage |
WO2001077653A1 (en) * | 2000-04-06 | 2001-10-18 | Hamamatsu Photonics K.K. | X-ray inspection system |
US20050207655A1 (en) * | 2004-03-22 | 2005-09-22 | Nasreen Chopra | Inspection system and method for providing feedback |
US9141764B2 (en) | 2010-11-12 | 2015-09-22 | Edge Medical Properties, Llc | System and method for online integrated multiple tablet ordering |
US9334096B2 (en) | 2004-10-01 | 2016-05-10 | Edge Medical Properties, Llc | Multiple inspection system and method that inspects different medications |
US8123036B2 (en) | 2004-10-01 | 2012-02-28 | Edge Medical Properties, Llc | Pill assembly for pill packaging and delivery systems |
US9710866B2 (en) * | 2005-09-30 | 2017-07-18 | Edge Medical, Llc | System and method for processing a multiple prescription order |
US9238518B2 (en) | 2004-10-01 | 2016-01-19 | Edge Medical Properties, Llc | Inspection system and method with a control process that inspects different medications |
US10315450B1 (en) | 2006-10-24 | 2019-06-11 | Edge Medical Properties, Llc | System and method for generating an integrated label for container housing multi-script pouches |
US7289601B2 (en) * | 2004-12-01 | 2007-10-30 | Imascope Inc. | Digital image collector for X-ray systems |
US10435192B2 (en) | 2011-05-16 | 2019-10-08 | Edge Medical Properties, Llc | Multiple inspection system and method that inspects different medications |
JP6034786B2 (ja) * | 2011-07-26 | 2016-11-30 | 富士フイルム株式会社 | 放射線撮影装置及びその制御方法、並びに放射線画像検出装置 |
JP6506356B2 (ja) * | 2017-07-26 | 2019-04-24 | ファナック株式会社 | 物品搬送システム及び搬送システム制御装置 |
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JPH10206352A (ja) * | 1997-01-23 | 1998-08-07 | Elco:Kk | X線異物検査装置 |
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NL7402868A (nl) * | 1974-03-04 | 1975-09-08 | Philips Nv | Teleivsie opneem-weergeefsysteem geschikt voor een kontinue en een kortdurende informatie-opname en voor een kontinue weergave. |
US4076984A (en) * | 1976-06-23 | 1978-02-28 | Jury Vasilievich Gromov | Introscope |
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DE4005111A1 (de) * | 1990-02-17 | 1991-08-22 | Philips Patentverwaltung | Roentgendiagnostikgeraet mit mitteln zur vergroesserten visuellen darstellung eines waehlbaren ausschnitts des gesamt-bildbereichs |
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JPH06311981A (ja) | 1993-04-30 | 1994-11-08 | Shimadzu Corp | X線撮像装置 |
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2001
- 2001-04-06 WO PCT/JP2001/002989 patent/WO2001077653A1/ja active Application Filing
- 2001-04-06 JP JP2001574861A patent/JP3513136B2/ja not_active Expired - Fee Related
- 2001-04-06 EP EP01919808A patent/EP1281953B1/en not_active Expired - Lifetime
- 2001-04-06 US US10/257,004 patent/US6876722B2/en not_active Expired - Lifetime
- 2001-04-06 AU AU2001246853A patent/AU2001246853A1/en not_active Abandoned
-
2004
- 2004-12-23 US US11/020,038 patent/US7356117B2/en not_active Expired - Lifetime
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JPS4910085A (ja) * | 1972-05-24 | 1974-01-29 | ||
JPS5348045B2 (ja) * | 1974-03-06 | 1978-12-26 | ||
JPS63100360A (ja) * | 1986-10-17 | 1988-05-02 | Hitachi Medical Corp | X線荷物検査装置 |
JPH10206352A (ja) * | 1997-01-23 | 1998-08-07 | Elco:Kk | X線異物検査装置 |
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Also Published As
Publication number | Publication date |
---|---|
US6876722B2 (en) | 2005-04-05 |
EP1281953B1 (en) | 2012-08-01 |
US20030142784A1 (en) | 2003-07-31 |
US7356117B2 (en) | 2008-04-08 |
EP1281953A1 (en) | 2003-02-05 |
JP3513136B2 (ja) | 2004-03-31 |
EP1281953A4 (en) | 2005-12-21 |
US20050100130A1 (en) | 2005-05-12 |
AU2001246853A1 (en) | 2001-10-23 |
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