WO2006035530A1 - X線検査装置 - Google Patents
X線検査装置 Download PDFInfo
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- WO2006035530A1 WO2006035530A1 PCT/JP2005/010582 JP2005010582W WO2006035530A1 WO 2006035530 A1 WO2006035530 A1 WO 2006035530A1 JP 2005010582 W JP2005010582 W JP 2005010582W WO 2006035530 A1 WO2006035530 A1 WO 2006035530A1
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- physical quantity
- article
- ray
- inspection apparatus
- ray inspection
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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
Definitions
- the present invention relates to an X-ray inspection apparatus that detects X-rays while transporting an article, detects the amount of transmission, and performs inspections such as contamination and number inspection.
- X-rays are irradiated to the inspection object that is continuously conveyed into the housing by the conveyor, and the transmission state of the X-ray is detected by the X-ray light receiving unit, so that the inside of the inspection object is detected. It is determined whether there is any foreign matter in the container, whether the object to be inspected is cracked or missing, and whether the quantity of the unit contents in the object to be inspected is insufficient.
- the X-ray inspection equipment may inspect the quantity of unit contents in the inspection object.
- there is an apparatus that performs stay detection using a line sensor for X-ray detection in order to detect the occurrence of stay of articles during conveyance see Patent Document 1.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2003-121388 (published on April 23, 2003)
- the conventional X-ray inspection apparatus has the following problems.
- the X-ray inspection apparatus disclosed in the above publication can detect the stay of an article being transported using a line sensor, but stays even if the article falls down while being transported into the housing. Abnormality cannot be detected until.
- An object of the present invention is to confirm the state of conveyance of an article to be inspected in a casing, The object is to provide an X-ray inspection system that can quickly detect abnormalities in the conveyance status of goods.
- the X-ray inspection apparatus irradiates an article transported in the housing with X-rays, detects the amount of the transmission, and detects the number of articles that are contaminated with the article.
- An X-ray detection apparatus that includes a transport unit, an irradiation unit, an X-ray detection unit, a first measurement unit, a second measurement unit, and a determination unit.
- the conveyance unit conveys an article to be inspected.
- the irradiation unit irradiates the article conveyed by the conveyance unit with X-rays.
- the X-ray detection unit detects the amount of X-rays transmitted to the article.
- the first measuring unit measures the physical quantity of the article in the normal transport state.
- the second measuring unit measures the physical quantity of the article in the housing.
- the determination unit compares the physical quantity measured by the first measurement unit with the physical quantity measured by the second measurement unit, and determines the conveyance state of the article.
- the X-ray inspection device that detects the amount of X-rays irradiated to the article from the irradiation unit at the X-ray detection unit and performs foreign matter contamination, number inspection, etc.
- the physical quantity of the article in the normal conveyance state (hereinafter referred to as the reference)
- a first measurement unit that measures physical quantities
- a second measurement unit that measures physical quantities of articles conveyed in the housing. Then, the reference physical quantity measured in the first measuring unit is compared with the actual physical quantity measured in the second measuring unit, and whether the physical quantity matches or not is determined.
- a determination unit for determining the conveyance state is further provided.
- the irradiation unit stops X-ray irradiation and It is possible to take measures such as taking out an article from the inside and reinspecting it.
- item means the attitude
- the physical quantity of the article measured by the first and second measuring units can be the length, shape, area, center of gravity, concentration distribution, etc. of the article.
- the first and second measurement units for example, a camera, a phototube, a line sensor, or the like can be used.
- the article whose posture is likely to be disturbed an article having a large height relative to the area to be installed in the transport unit, a lightweight article, or the like can be considered. Therefore, for example, it is particularly preferable to apply the present invention to an X-ray inspection apparatus that targets an object such as a cup ramen.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to the first invention, wherein the article conveyance state is the posture of the article conveyed by the conveyance unit.
- the determination unit determines whether or not the posture of the article to be conveyed is disturbed. Thereby, for example, even when an article falls on the transport unit, the determination unit can determine whether an abnormality has occurred.
- the posture of the article includes the inclination of the article (whether or not it is tilted) on the conveyance unit, the direction of the article in the carrying direction, and the like.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to the first or second aspect of the present invention, wherein the first measurement unit is arranged on the upstream side of the housing.
- the first measurement unit that measures the reference physical quantity for determining the disturbance of the transport state is arranged upstream of the case where the X-ray inspection is performed.
- the physical quantity of an article in a normal transport state can be measured before being transported into the housing and can be used as a reference physical quantity.
- the measurement of the physical quantity of the article by the first measuring unit may be performed only once at the start of the inspection when the articles to be inspected are the same, or a plurality of times with a predetermined time and number interval. It may be done.
- An X-ray inspection apparatus is an X-ray inspection apparatus according to any one of the first to third inventions, wherein an opening formed in a housing for carrying an article is provided.
- the screen is provided with a shielding nole that prevents external leakage of X-rays.
- an X-ray is opened in the opening for carrying an article into a housing to be inspected by X-ray.
- such shielded noren contains lead etc. in the noren part in order to prevent X-rays from leaking outside.
- such shielding noren is provided in a plurality of stages. For this reason, since the article to be inspected passes through a shielding nolen containing lead and is carried into the housing, it is shielded particularly when the article is light or when the position of the center of gravity of the article is high. There is a risk of being knocked down by Noren.
- the X-ray inspection apparatus of the present invention when an article that has passed through the shielding noel and is transported into the housing collapses in this way, the measurement result in the first measurement unit and the measurement result in the second measurement unit , It can be easily determined that there is no normal conveyance state. As a result, it is possible to stop the operation of the apparatus, take out articles that have fallen in the housing, and perform inspection again in a normal transport state.
- An X-ray inspection apparatus is an X-ray inspection apparatus according to any one of the first to fourth inventions, and stores a physical quantity of an article measured by the first measurement unit Is further provided.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to fifth inventions, wherein the second measurement unit is based on a detection result in the X-ray detection unit. To measure the physical quantity of the goods.
- the X-ray detection unit force such as a line sensor that measures the amount of X-ray transmission, also functions as a second measurement unit that measures a physical quantity for confirming the conveyance state of an article conveyed in the housing.
- An X-ray inspection apparatus is an X-ray inspection apparatus according to any one of the first to sixth inventions, wherein the determination unit determines that the article conveyance state is abnormal In such a case, the apparatus further includes a control unit that controls at least the conveyance of the article by the conveyance unit and the X-ray irradiation by the irradiation unit.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to seventh inventions, wherein the determination unit determines that the article conveyance state is abnormal.
- a warning unit is further provided for issuing a warning in the event of a failure.
- the warning unit issues a warning to the worker by a display or a warning sound.
- the worker can recognize the occurrence of an abnormality such as the article to be inspected falling down in the housing and take measures such as temporarily stopping the inspection.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to eighth aspects, wherein the physical quantity is a physical quantity related to the length of the article.
- the physical quantities related to the length such as the width, length, and outer perimeter on the plane in the conveyance direction of the article are measured at the first and second measuring units.
- the transport state can be easily determined using the physical quantity related to the length measured by the first and second measuring units.
- cameras and phototubes can be used as the first and second measurement units.
- the X-ray inspection apparatus according to the tenth invention is the X-ray according to any one of the first to eighth inventions.
- the physical quantity is any one of a length, a width, and a peripheral length in a conveyance direction of a projection view obtained by projecting an article on a predetermined plane from a predetermined direction.
- the first and second measuring units measure the length, width, and perimeter of the projection view of the article from the direction in which the first and second measuring units are arranged.
- the conveyance state can be easily determined by using the length, the width, and the peripheral length in the conveyance direction of the article as physical quantities in plan view.
- cameras and phototubes can be used as the first and second measurement units.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to one of the first to eighth aspects of the invention, wherein the physical quantity is a physical quantity relating to the shape of the article.
- the physical quantity related to the shape of the article for example, the shape of the article in plan view is measured by the first and second measuring units.
- cameras and phototubes can be used as the first and second measurement units.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to eighth inventions, wherein the physical quantity is a physical quantity related to the center of gravity of the article.
- the physical quantity related to the center of gravity of the article for example, the center of gravity of the shape of the article in plan view is measured by the first and second measuring units.
- the transport state can be easily determined using the physical quantity related to the center of gravity position measured by the first and second measuring units.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to eighth aspects, wherein the physical quantity is a physical quantity relating to the area of the article.
- the physical quantity relating to the area of the article on the plane is measured by the first and second measuring units.
- the transport state can be easily determined using the physical quantity related to the area measured by the first and second measuring units.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to eighth inventions, wherein the physical quantity is a physical quantity related to the concentration distribution of the article.
- the physical quantity related to the density distribution of the article for example, the density distribution in the X-ray image created based on the X-ray dose transmitted through the article is measured by the first and second measuring units.
- the transport state can be easily determined using the physical quantity related to the concentration distribution measured in the first and second measuring units.
- X-ray detectors such as line sensors can be used as the first and second measurement units.
- An X-ray inspection apparatus is the X-ray inspection apparatus according to any one of the first to eighth aspects of the present invention, wherein the physical quantity is a physical quantity related to the time during which the article is conveyed.
- the time during which the article is conveyed for example, the time from when the article is detected by the first measuring unit to when it is detected by the second detecting unit, or the time when the article is detected by the second detecting unit. Based on the inspection, the conveyance state of the article is inspected.
- the article in the normal conveyance state has a constant length in the conveyance direction, based on this length and the conveyance speed, the article passing time and detection time in the normal conveyance state are directly used as the reference physical quantity. be able to.
- the X-ray inspection apparatus of the present invention since it is possible to easily determine that the article is not normally transported due to the article falling or the like, the X-ray irradiation by the irradiation unit is stopped and the housing is stopped. It is possible to take measures such as taking out an article from the body and performing a re-examination.
- FIG. 1 is an external perspective view of an X-ray inspection apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram showing a configuration before and after an X-ray inspection apparatus.
- FIG. 3 Simplified configuration diagram inside the shield box of the X-ray inspection device.
- FIG. 4 is a block diagram of the control computer.
- FIG. 5 is a side view showing the inside of the shield box.
- FIG. 6 is a plan view showing the inside of the shield box.
- FIG. 7 is a side view showing the inside of the shield box when a conveyance abnormality of product G occurs.
- FIG. 8 is a plan view showing the inside of the shield box when a product G conveyance abnormality occurs.
- FIG. 9 is a diagram showing a conveyance state determination control flow by the X-ray inspection apparatus of FIG.
- FIG. 10 is a diagram showing a continuation of the determination control flow of FIG.
- FIG. 11 (a) to (c) are diagrams showing an example of the shape of an article whose center of gravity is required. (D) is a graph for finding the importance.
- FIG. 12 (a) and (b) are diagrams showing an example of the shape of an article whose concentration distribution is required. (C) is a histogram showing the density distribution.
- Control computer determination unit, control unit, warning unit
- the X-ray inspection apparatus 10 is one of the apparatuses that perform quality inspection in a production line for commodities such as food.
- the X-ray inspection device 10 irradiates X-rays to the products that are continuously conveyed, and whether or not foreign matter enters the products based on the X-ray dose that has passed through the products. Perform inspection.
- the commodity G is conveyed to the X-ray inspection apparatus 10 by the front conveyor 60.
- Commodity G is judged by the X-ray inspection apparatus 10 for the presence of foreign matter.
- the determination result in the X-ray inspection apparatus 10 is transmitted to a distribution mechanism 70 disposed on the downstream side of the X-ray inspection apparatus 10. If the product G is determined to be a non-defective product by the X-ray inspection apparatus 10, the distribution mechanism 70 uses the product G as it is as a regular line competition. Send to 80.
- the arm 70a having the downstream end as a rotation shaft rotates so as to block the conveyance path.
- the product G determined to be defective can be collected in the defective product collection box 90 arranged at a position off the conveyance path.
- the X-ray inspection apparatus 10 mainly includes a shield box (housing) 11, a conveyor (conveying unit) 12, a shielding panel 16, and a monitor with a touch panel function (display unit). And. Inside the shield box 11, as shown in FIG. 3, a comparator 12, an X-ray irradiator (irradiation unit) 13, an X-ray line sensor (X-ray detection unit, second measurement unit) 14, photoelectric It has a tube (first measurement unit) 17 and a control computer (determination unit, control unit, warning unit) 20 (see Fig. 4).
- the shield box 11 has a loading / unloading port 11a and a loading / unloading port l ib for loading and unloading the product on both the entrance side and the exit side of the product G.
- the shield box 11 houses a conveyor 12, an X-ray irradiator 13, an X-ray line sensor 14, a control computer 20 (see FIG. 4), and the like.
- the carry-in entrance 11 a and the carry-out exit l ib are blocked by a shield noren 16 in order to prevent leakage of X-rays to the outside of the shield box 11.
- This shielding noile 16 has a rubber nolene containing lead and is pushed away by the product when the product is carried in and out.
- a key insertion switch and power switch are arranged on the upper front of the shield box 11.
- the conveyor 12 conveys commodities within the shield box 11, and is driven by a conveyor motor 12f included in the control block shown in FIG.
- the conveying speed of the conveyor 12 is controlled by the control computer 20 through inverter control of the conveyor motor 12f so as to be the set speed input by the operator.
- the conveyor 12 includes a conveyor benolet 12a, a conveyor frame 12b, an opening 12c, and a conveyor guide 12d.
- the conveyor 12 is shielded Removably attached to box 11. As a result, even when food is handled as an inspection object, it is possible to remove the competitor and clean it frequently in order to keep the inside of the shield box 11 clean.
- the conveyor belt 12a is an endless belt, and the inside of the belt is supported by the conveyor frame 12b. Then, the object placed on the belt is conveyed in a predetermined direction by rotating under the driving force of the conveyor motor 12f.
- the conveyor frame 12b supports the conveyor belt 12a from the inside of the endless belt, and has an opening 12c that is long in the direction perpendicular to the conveyance direction at a position facing the inner surface of the conveyor belt 12a. And les.
- the opening 12c is formed on a line connecting the X-ray irradiator 13 and the X-ray line sensor 14 in the conveyor frame 12b.
- the opening 12c is formed in the X-ray irradiation region from the X-ray irradiator 13 in the conveyor frame 12b.
- the conveyor guide 12d is arranged on both sides of the conveyor belt 12a that forms the conveyance path of the product G, and guides the articles moving on the conveyor 12 so as not to deviate from the conveyance path.
- the conveyor guide 12d crosses over the X-ray line sensor 14 disposed below the conveyor 12 and intersects the X-ray line sensor 14 in a plan view, in other words, These are disposed in the X-ray irradiation area irradiated from the X-ray irradiator 13.
- the conveyor guide 12d is attached to the shield box 11 together with the conveyor 12 in a detachable state. For this reason, even when food is handled as an inspection target, the inside of the shield box 11 can be kept clean by removing and cleaning the entire competitor 12.
- the X-ray irradiator 13 is disposed above the conveyor 12 and is disposed below the conveyor 12 through an opening 12c formed in the conveyor frame 12b. X-rays are irradiated in a fan shape toward 14 (see the shaded area in Fig. 3). As a result, the X-ray dose transmitted through the product G transported on the X-ray line sensor 14 is converted into the X-ray line sensor. It can be detected at 14.
- the X-ray line sensor 14 is disposed below the conveyor 12 and detects X-rays transmitted through the product G conveyor belt 12a.
- the X-ray line sensor 14 includes a plurality of pixels arranged horizontally in a straight line in a direction orthogonal to the conveying direction by the conveyor 12. Further, the X-ray line sensor 14 transmits X-ray transmission amount data in each pixel for forming an X-ray image of the product G in plan view to the control computer 20. Then, the control computer 20 performs a foreign matter contamination inspection and a conveyance state determination of the product G, which will be described later, based on the X-ray image formed by the X-ray transmission amount.
- the monitor 26 is a full-dot liquid crystal display.
- the monitor 26 has a touch panel function, and displays a screen that prompts input of parameters relating to initial setting and defect determination.
- the monitor 26 displays an inspection result of the product G, a warning when a conveyance state abnormality of the product G in the shield box 11 (a fall of the product G, etc.) occurs.
- the control computer 20 is equipped with a CPU 21 and RM22, RAM23, and CF (compact flash (registered trademark) storage unit) 25 as main storage units controlled by the CPU 21. Yes.
- CF25 a file 25a that stores the reference physical quantity of the product G, which is a reference for determining whether or not an abnormality has occurred in the conveyance state of the product G in the shield box 11 described later, an X-ray image of the product G, A test result log file 25b for storing test results is stored.
- the CPU 21 reads various programs such as an X-ray inspection program and a conveyance state determination program stored in the storage unit, and executes an X-ray inspection unit. It functions as a determination unit that determines the conveyance status, a warning unit that issues an alarm when an abnormality in the conveyance status is determined, and the like.
- the control computer 20 also includes a display control circuit that controls data display on the monitor 26, a key input circuit that captures key input data from the touch panel of the monitor 26, and an I / O for controlling data printing in a printer (not shown).
- Storage units such as CPU21, R0M22, RAM23, and CF25 are connected to each other via bus lines such as an address bus and a data bus.
- the control computer 20 is connected to a conveyor motor 12f, a rotary encoder 12g, an X-ray irradiator 13, an X-ray line sensor 14, a phototube 17 and the like.
- the rotary encoder 12g is attached to the conveyor motor I2f, detects the conveying speed of the conveyor 12, and transmits it to the control computer 20.
- the X-ray irradiator 13 is controlled by the control computer 20 to control X-ray irradiation timing, X-ray irradiation amount, X-ray irradiation prohibition, and the like.
- the X-ray line sensor 14 transmits data corresponding to the X-ray dose detected at each pixel to the control computer 20.
- the phototube 17 is arranged on the side of the conveyor 12 in order to measure the reference physical quantity of the product G, which is the test object, and is placed in front of the phototube 17 (between the light emitting and receiving elements 17a and 17b (Figs. Send the ON / OFF signal to the control computer 20 indicating the time that the product G has passed.
- the control computer 20 measures a reference physical quantity (length in the conveyance direction of the product G), which will be described later, based on the received ON / OFF signal and the conveyance speed of the product G by the conveyor 12.
- the phototube 17 has a pair of a light emitting element 17a and a light receiving element 17b.
- the light emitting / receiving elements 17a and 17b are mounted on the upstream side of the carry-in port 11a of the shield box 11 so that the conveyor 12 (the conveyance path for the product G) is sandwiched between the conveyance paths.
- the light irradiated from the light emitting element 17a is detected by the light receiving element 17b. Therefore, the phototube 17 emits light parallel to the transport path from the light emitting element 17a. While the light receiving element 17b is detecting this light, the photoelectric tube 17 is in a state of N, and the light receiving element 17b cannot detect the light.
- the photoelectric tube 17 starts detecting the passage of the product G at the start of operation in order to detect the transport state (posture etc.) before being transported to the shield box 11 of the product G transported by the conveyor 12. Sends ON / OFF signal to control computer 20 I believe.
- the control computer 20 measures the reference physical quantity used for judging the conveyance state based on the ON / OFF signal and the conveyance speed by the conveyor 12. As the reference physical quantity, the length of the product G in the transport direction is measured.
- the reference physical quantity measured here (the length in the conveyance direction of the product G) is the product in the shield box 11 measured from the X-ray image created based on the X-ray transmission amount detected by the X-ray line sensor 14. Compared with the transport direction length of G. Then, based on the comparison result, a determination is made as to whether there is an abnormality in the conveyance state of the product G. The determination of whether or not there is an abnormality in the conveyance state will be described in detail later.
- the light emitting / receiving elements 17a and 17b are attached so as to be movable in the vertical direction. As a result, the product G can be moved to an optimal height position according to the height of the product G, and the passing time of the product G can be detected.
- the instant ramen in a cup described as the product G in the present embodiment is characterized by being light in weight and having a high center of gravity. For this reason, when the product is transported into the shield box 11, as shown in FIG. Such a fall of the product G during transportation is particularly likely to occur when the product G is light in the weight of the noren portion of the shielding nolen 16 and the product G is a tall product. Since the overturned product G is transported in the state shown in Fig. 8, the shape and density distribution of the X-ray image differs from the product G in the normal transport state, and appropriate foreign matter contamination inspection is performed. There is a risk that it will not be possible.
- the presence or absence of an abnormality in the conveyance state of the product G (the posture of the product G) in the shield box 11 is determined using the above configuration.
- the conveyance state abnormality is determined according to the control flow shown in FIGS. That is, when the operation is started, the photoelectric tube 17 detects the passage of the commodity G conveyed in step S1. In step S2, this detection time is displayed. Send an ON / OFF signal to the control computer 20. In step S3, the control computer 20 measures the physical quantity related to the length in the conveyance direction of the product G as the reference physical quantity from the ON / OFF signal received from the phototube 17 and the conveyance speed by the conveyor 12, and In step S4, the reference physical quantity is stored in the reference physical quantity file 25a of the commodity G in the CF25.
- the reference physical quantity when the reference physical quantity is measured and stored in the CF 25 for the product G to be inspected first after the operation is started, the reference physical quantity is not stored in the CF 25 for each product G thereafter. Judgment is performed using the reference physical quantity.
- the reference physical quantity stored in the CF25 can be used continuously until the type of product subject to inspection is changed. For products that have been previously checked and the reference physical quantity is stored in the CF25, it is not necessary to detect the passage of the product G using the phototube 17 and send an ON / OFF signal to the control computer 20 again. It is possible for the operator to read the reference physical quantity stored in the CF25 and make a judgment.
- the X-ray transmission amount is measured by the X-ray line sensor 14 in step S5, and in step S6, the X-ray transmission amount is measured.
- An X-ray image is created based on the amount of transmission. This X-ray image is formed by detecting X-rays that have passed through the commodity G from below the competitor 12 (conveyance path for the commodity G). Therefore, based on the X-ray image showing the shape of the product G in plan view, the length of the product G in the conveyance direction can be easily measured.
- the transport state is normal (the product G is not overturned)
- the transport direction length reference physical quantity
- the transport direction length determined by the X-ray line sensor 14 Physical quantity
- control computer 20 compares the reference physical quantity stored in CF2 5 with the physical quantity of the product G measured in the shield box 11 in steps S12 to S13 shown in FIG. If it is within the predetermined error range, it is determined in step S14 that the conveyance state is normal. On the other hand, if the reference physical quantity and the physical quantity measured based on the X-ray image are not within the predetermined error range (see FIG. 8), it is determined in step S15 that the conveyance state is abnormal.
- control computer 20 determines that the conveyance state is abnormal
- the control computer 20 Control is performed to stop the operation of the entire apparatus, such as stopping X-ray irradiation from the X-ray irradiator 13 in 16 and stopping the conveyor 12 in step S17. Further, in step S18, the control computer 20 emits an alarm sound for notifying the operator of the abnormality in the conveyance state, and displays on the monitor 26 that the conveyance state is abnormal.
- the physical quantity that is the criterion for judgment is not to see whether one standard physical quantity matches or does not match.
- the physical quantity that is used for judgment is a combination of two standard physical quantities: the length in the transport direction and the height of product G Is preferred.
- the product G has fallen, but the length measured according to the fall direction coincides with the reference physical quantity and prevents the erroneous determination that the conveyance state is normal. It is possible to prevent the accuracy from deteriorating.
- the height of the product G is also set as a reference physical quantity, it is preferable to provide a plurality of photoelectric tubes arranged in the vertical direction on the side of the conveyance path.
- the control computer 20 uses the ON / OFF signal received from the photoelectric tube 17 to preliminarily start the reference physical quantity of the product G to be inspected (the product G Measure the length in the transport direction).
- the control computer 20 determines the product G carried into the shield box 11. Then, the physical quantity corresponding to the reference physical quantity is measured. Then, the measured physical quantity is compared with the reference physical quantity, and if it is within a predetermined error range, it is determined as a normal conveyance state. On the other hand, the measured physical quantity is compared with the reference physical quantity, and if it is not within the predetermined error range, it is determined that the conveyance state is abnormal.
- the orientation of the X-ray image formed based on the detected value of the X-ray transmission amount in the X-ray line sensor 14 changes, and X-ray image correction and foreign object detection are performed. Etc. may not be performed properly. As a result, the foreign object detection accuracy may be reduced.
- the X-ray inspection apparatus 10 of the present embodiment it is possible to perform normal correction before carrying the shield box 11.
- the occurrence of an abnormality in the conveyance state is detected.
- the photoelectric tube 17 for measuring the reference physical quantity of the product G is disposed on the upstream side of the shield box 11.
- a shielding nolen 16 having lead-containing nolene is provided at the loading / unloading port of the product G in the shielding box 11.
- the X-ray inspection apparatus 10 of the present embodiment can detect such an abnormality in the conveyance state due to the fall or rotation of the product G at an early stage. For this reason, it is possible to prevent the product G from being transported and retained due to a fall of the product G and the failure to perform proper X-ray inspection.
- a reference object used for determining whether there is a conveyance abnormality It is equipped with a CF25 that stores the rationale (the length in the conveyance direction of product G).
- an X-ray line sensor 14 is used as a second measurement unit for measuring a physical quantity in the shield box 11.
- the X-ray line sensor 14 that originally measures the amount of X-ray transmission for creating an X-ray image for X-ray inspection is the second measurement for measuring the physical quantity for determining the conveyance state.
- the number of parts can be reduced and the cost can be reduced.
- the X-ray image for detecting foreign matter created based on the X-ray transmission amount detected by the X-ray line sensor 14 is also used for physical quantity measurement for determining the transfer state, thereby The determination process can be simplified.
- the control computer 20 determines that there is an abnormality in the conveyance state
- at least the operation of the conveyor 12 and the X-ray irradiator 13 is stopped.
- the conveyance of the product G and the irradiation of X-rays are stopped almost simultaneously with the detection of the conveyance state abnormality, so that the product G that has fallen and rotated in the shield box 11 is taken out by hand and is again upstream of the shield box 11. Can be re-inspected. Therefore, a highly safe X-ray inspection apparatus 10 can be provided.
- a warning sound is generated and a warning screen informing the conveyance state abnormality is displayed on the monitor 26.
- a physical quantity related to the length of the product G in the transport direction is used as a physical quantity for determining the transport state.
- the length in the transport direction in plan view for the product G is used as the reference physical quantity.
- Measurement physical quantity can be measured.
- the physical quantity related to the length of the product G (in the transport direction) Length) was described as an example.
- the present invention is not limited to this.
- a width in the transport direction, an outer peripheral length, and the like can also be used.
- the width in the conveyance direction of the product G can be detected by arranging a plurality of photoelectric tubes above the product G.
- the outer perimeter of the product G it is possible to measure the image force photographed using a camera or the like placed above the conveyance path.
- the shape of the product G may be determined as a physical quantity. For example, in the case where the instant ramen in a cup is the product G as in the above-described embodiment, if the transport state of the product G is normal, the photoelectric tube or camera disposed above the transport path, the X-ray line sensor 14 A round shape should be identified from. Therefore, if the shape of the product G specified by the X-ray line sensor 14 is not a circle but a trapezoid, it can be recognized that the product G has fallen, and can be detected as an abnormal conveyance state.
- the position of the center of gravity is identified from an image (a planar view image in the above embodiment) in which the product G is projected from an imaging device such as a camera as the first measurement unit and the X-ray line sensor 14 as the second measurement unit.
- the articles shown in the projections shown in FIGS. 11 (a) to 11 (c) are shown in FIG. 11 (d) created based on the distance R and the angle ⁇ from each position of the outer periphery of the product G.
- the barycentric position can be obtained from the graph.
- the solid line shown in Fig. 11 (d) is a graph showing the relationship between and ⁇ of the article shown in Fig. 11 (a).
- the one-dot chain line and two-dot difference line shown in Fig. 11 (d) are 11 is a graph showing the relationship between and ⁇ of the articles shown in FIGS. 11 (b) and 11 (c), respectively.
- the area of the figure obtained by projecting the product G by the camera and the X-ray line sensor 14 can be determined as the physical quantity.
- the density distribution of the X-ray image created based on the X-ray transmission amount in the X-ray line sensor 14 may be determined as the physical quantity.
- the brightness (density) in the histogram (see Fig. 12 (c)) created according to the density distribution of the X-ray image created for the article with the shape shown in Fig. 12 (a) and Fig. 12 (b). Judgment can be made by comparing peaks and peak frequencies.
- an irradiation unit for irradiating X-rays is placed above the product G and placed below it.
- the X-ray transmission amount may be detected by the X-ray line sensor.
- the solid line of the graph shown in FIG. 12 (c) shows the histogram of the article shown in FIG. 12 (a), and the dotted line shows the histogram of the shape shown in FIG. 12 (b).
- the present invention is not limited to this.
- the reference physical quantity of the product G may be measured in advance before starting the operation and stored in the CF 25, and then the operation may be started. In this case, since the reference physical quantity is already stored at the start of operation, for example, even when the first product G falls, it is possible to detect this as a conveyance abnormality.
- the phototube 17 is arranged upstream of the shield box 11.
- a NZ OFF signal indicating the transit time of the product G detected in the photoelectric tube 17 is transmitted to the control computer 20, and the control computer 20 measures the reference physical quantity from the ON / OFF signal and the conveyance speed of the product G.
- the present invention is not limited to this.
- a measuring device equipped with a function for measuring a reference physical quantity may be provided on the upstream side of the shield box 11 as the first measuring unit.
- the control computer 20 can make the determination only by comparing the reference physical quantity with the physical quantity.
- the X-ray line sensor 14 as the second measurement unit passes through the photoelectric tube 17 as the first measurement unit.
- the time until detection may be used as the reference physical quantity.
- measures such as stopping X-ray irradiation from the X-ray irradiator 13 can be taken.
- the time continuously detected by the X-ray line sensor 14 based on the length of the product G in the normal conveyance state in the conveyance direction and the conveyance speed may be used as the reference physical quantity. In this case, if the time continuously detected by the X-ray line sensor 14 is shorter or longer than the reference time, the product G is expected to fall down. Can be determined as a conveyance abnormality.
- a camera or the like that can measure a reference physical quantity based on a planar view image of the product G obtained by photographing the product G from above the conveyance path.
- the X-ray line sensor 14 has been described as an example of functioning as the second measurement unit.
- the present invention is not limited to this.
- a camera or phototube as a second measurement unit may be provided in the shield box 11.
- the instant ramen in a container has been described as an example of the product G.
- the present invention is not limited to this.
- an article other than instant noodles in a container is particularly effective in obtaining the effect of the present invention because it is easy to fall down during conveyance if it is an article having a height from the conveyance surface and having a high center of gravity or a light article. be able to.
- the present invention can also be applied to an X-ray inspection apparatus that inspects the number of contents of a product G that is not subjected to foreign matter contamination inspection.
- the X-ray inspection apparatus of the present invention has an effect that it is possible to detect an overturn of an article in a housing as an abnormality in a conveyance state, various inspection apparatuses that perform inspection on an article being conveyed Widely applicable.
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Abstract
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CN2005800013354A CN1898556B (zh) | 2004-09-29 | 2005-06-09 | X射线检查装置 |
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JP2004-284139 | 2004-09-29 | ||
JP2004284139A JP2006098195A (ja) | 2004-09-29 | 2004-09-29 | X線検査装置 |
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JP (1) | JP2006098195A (ja) |
CN (1) | CN1898556B (ja) |
WO (1) | WO2006035530A1 (ja) |
Families Citing this family (8)
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JP2008039495A (ja) * | 2006-08-03 | 2008-02-21 | Ishida Co Ltd | X線検査装置 |
JP5156546B2 (ja) * | 2008-08-28 | 2013-03-06 | 株式会社イシダ | X線検査装置 |
JP5912552B2 (ja) | 2012-01-12 | 2016-04-27 | ヤマハ発動機株式会社 | X線検査装置 |
CN103745198A (zh) * | 2013-12-30 | 2014-04-23 | 中云智慧(北京)科技有限公司 | 行邮辅助识别及对比的方法与装置 |
JP6859278B2 (ja) * | 2018-01-10 | 2021-04-14 | アンリツインフィビス株式会社 | X線検査装置 |
JP6859277B2 (ja) * | 2018-01-10 | 2021-04-14 | アンリツインフィビス株式会社 | X線検査装置 |
JP6859276B2 (ja) * | 2018-01-10 | 2021-04-14 | アンリツインフィビス株式会社 | X線検査装置 |
CN108671460A (zh) * | 2018-04-18 | 2018-10-19 | 尹丽群 | 一种消防设备 |
Citations (3)
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JP2002181735A (ja) * | 2000-12-13 | 2002-06-26 | Anritsu Corp | X線異物検出装置及び該装置における被検査物の移動停止検出方法 |
JP2002228601A (ja) * | 2001-01-29 | 2002-08-14 | Anritsu Corp | X線異物検出装置 |
JP2003121388A (ja) * | 2001-10-19 | 2003-04-23 | Ishida Co Ltd | X線検査装置 |
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JP2002148211A (ja) * | 2000-11-07 | 2002-05-22 | Ishida Co Ltd | X線検査装置 |
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-
2005
- 2005-06-09 CN CN2005800013354A patent/CN1898556B/zh not_active Expired - Fee Related
- 2005-06-09 WO PCT/JP2005/010582 patent/WO2006035530A1/ja active Application Filing
Patent Citations (3)
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JP2002181735A (ja) * | 2000-12-13 | 2002-06-26 | Anritsu Corp | X線異物検出装置及び該装置における被検査物の移動停止検出方法 |
JP2002228601A (ja) * | 2001-01-29 | 2002-08-14 | Anritsu Corp | X線異物検出装置 |
JP2003121388A (ja) * | 2001-10-19 | 2003-04-23 | Ishida Co Ltd | X線検査装置 |
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CN1898556B (zh) | 2010-06-16 |
CN1898556A (zh) | 2007-01-17 |
JP2006098195A (ja) | 2006-04-13 |
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