JP5431659B2 - Foreign object detection device - Google Patents

Description

  The present invention relates to a foreign matter detection device that detects foreign matter mixed in an object to be inspected such as raw meat, fish, processed food, medicine, and the like, and more particularly, to an operation confirmation technique for confirming whether or not the device operates correctly. Is.

  For example, X-ray foreign matter detection devices and metal detection devices are conventionally known as foreign matter detection devices that detect foreign matters contained in various inspection objects such as raw meat, fish, processed foods, and pharmaceuticals.

  Such a conventionally known X-ray foreign matter detection apparatus irradiates the inspection object conveyed on the conveyance line with X-rays and transmits the inspection object along with the irradiation of the X-rays. Whether or not foreign matter is mixed in the inspection object is detected from the transmission amount of the line. In addition, conventionally known metal detection devices generate an alternating magnetic field in the transport line, pass each kind of inspection object through the alternating magnetic field, and detect the metal from the detection output when passing through the magnetic field. Inspected by detecting the presence or absence of magnetism, magnetizing the magnetic material in the inspection object by generating a DC magnetic field for each type of inspection object, and detecting the magnetism with a magnetic sensor It is detected whether or not foreign matter is mixed in the object.

  By the way, in this kind of foreign matter detection device, in order to improve reliability while maintaining sensitivity and accuracy, operation confirmation is performed as to whether there is any defect or abnormality as necessary.

  For example, in metal detectors, when used after a long period of non-use, or in special cases where high accuracy is required, a foreign material sample incorporating a metal ball is transported before use and inspected with a foreign material sample. The operation of the detection function is confirmed.

  However, depending on the user, the metal detection device is often used without confirming such an operation. If the metal detector is used without checking such an operation, erroneous detection such as detection of metal foreign matter may occur.

Therefore, in order to prevent such erroneous detection, not only a special case but also a test of whether or not the metal detection means operates normally is performed before using the metal detection device. For example, as shown in Patent Document 1 below, when the test passes, the control means enables the metal detection means to operate, and when the test fails or when the test is not performed, the control means sets the metal detection means. Proposals have been made to stop the operation and prevent the object to be inspected, in which metal foreign matter is mixed due to detection leakage, from flowing into other product processing steps.
Japanese Patent No. 3560703

  By the way, in this kind of foreign object detection device, since the sensitivity to be managed is different for each type of inspection object, it is desired to perform a test so that the foreign substance having the optimum size can be detected for each type of inspection object. However, when performing a conventional test, a specified foreign material sample was flowed under a very simple instruction such as “Please let the defective product flow” to confirm the operation. For this reason, the operation confirmation by the foreign material sample suitable for every kind of to-be-inspected object was not performed. In addition to foreign metals such as iron, SUS, and aluminum detected by the metal detection device, foreign materials such as glass, bone, and rubber can be detected by the X-ray foreign material detection device. As a result, the number of types of foreign matter samples has increased, and there has been a problem that the risk of performing an operation check by flowing an inappropriate foreign matter sample tends to increase further.

  Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide a foreign object detection device that can realize operation confirmation according to detection sensitivity for each inspection object.

In order to achieve the above object, the foreign object detection device according to claim 1 of the present invention includes a detection unit 3 that outputs a signal in response to a foreign object contained in the inspection object W;
A foreign matter determination unit 5 for determining whether or not a foreign matter is included in the inspection object based on a signal from the detection unit;
An operation confirmation processing unit 6 for determining whether or not the detection unit operates correctly using the foreign material sample P;
In the foreign object detection device 1 including the display unit 7 for displaying the result determined by the foreign object determination unit and the result determined by the operation check processing unit,
In the operation check processing unit, a plurality of foreign matter samples to be determined to be specified for each product type are set, and the signal level of the detection output of the detection unit is within an allowable range set according to the type of the foreign matter sample Whether or not the detection unit operates correctly is determined based on whether or not, and a result of the determination is displayed in a list on the display unit in association with the type of the foreign material sample .

Foreign matter detecting device according to claim 2, in the foreign matter detecting apparatus according to claim 1 Symbol placement,
The apparatus further comprises foreign matter sample information acquisition means 8 for acquiring foreign matter sample information for specifying foreign matters from the foreign matter sample P.

The foreign matter detection device according to claim 3 is the foreign matter detection device according to claim 2 ,
The operation confirmation processing unit 6 includes the foreign material sample information acquired by the foreign material sample information acquisition unit 8, and information for specifying a foreign material sample to be determined by the operation confirmation processing unit stored in the foreign material sample storage unit 6a. It has the collation means 6c which collates.

The foreign object detection device according to claim 4 is the foreign object detection device according to claim 1,
Foreign matter sample information acquisition means 8 for acquiring foreign matter sample information from the foreign matter sample P,
When the foreign matter sample information acquisition means acquires foreign matter sample information from the object to be inspected, the foreign matter sample information acquisition means shifts to a test mode for confirming the operation of the detection unit, and operates the detection unit by the operation confirmation processing unit. Confirmation is performed.

According to the present invention, it is determined whether or not the detection unit operates correctly depending on whether or not the detection output is within an allowable range corresponding to the information specifying the foreign material sample managed for each type of inspection object. Therefore, it is possible to reduce the risk of an inappropriate operation confirmation test being performed. In addition, the operator is encouraged not to use the wrong type of foreign material sample, and the working efficiency can be improved. Furthermore, since the operation confirmation determination result for each type of foreign material sample according to the type of the inspection object is displayed, it can be confirmed whether or not the operation confirmation corresponding to the type of the inspection object has been correctly performed. There is an effect.

In the foreign matter detection apparatus according to claim 2 , since the foreign matter sample actually used at the time of the operation check can be recognized, the information can be recorded to check even after the operation check is finished, and the quality record As an effect, it can be used for quality control.

In the foreign matter detection apparatus according to claim 3 , since the foreign matter sample actually used at the time of checking the operation can be compared with the foreign matter sample to be transported, the operator is prompted to use the correct foreign matter sample again, and the work efficiency is improved. The effect that can be raised.

In the foreign matter detection apparatus according to the fourth aspect , there is an effect that it is possible to automatically shift to a test mode for operation confirmation using a foreign matter sample to be further determined.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a foreign object detection device according to the present invention, FIG. 2 is a block diagram showing a second embodiment of the foreign object detection device according to the present invention, and FIG. 3 is a foreign object according to the present invention. FIG. 4 is a block configuration diagram showing a third embodiment of the detection device, and FIGS. 4A to 4C are diagrams showing a configuration example of a foreign material sample used when confirming the operation in the foreign material detection device according to the present invention. FIG. 5 is a diagram showing a specific example of the type and size of a foreign material sample, FIG. 6 is a configuration diagram of an X-ray detection unit forming a detection unit of the foreign material detection device according to the present invention, and FIG. 7 is a foreign material detection device according to the present invention. FIG. 8A and FIG. 8B are two-dimensional representations of the detection output of the metal detection unit when foreign objects of the same type of metal having different sizes are detected. Waveform diagram, Fig. 9 shows the detection of non-defective samples and foreign material samples at the optimum detection phase. FIG. 10A and FIG. 10B are diagrams showing an example of an operation check screen and an example of an operation check result output of the foreign object detection device according to the present invention. FIG. 11 is a block diagram showing a part of another configuration of the foreign object detection device according to the present invention.

  The foreign object detection device of this example is incorporated as a part of a production line where objects to be inspected such as raw meat, fish, processed foods, and medicines are transported, and detects foreign objects mixed in the object to be inspected. For example, it has a function (operation confirmation function) for confirming whether or not the apparatus operates correctly by using the foreign material sample P having the configuration as shown in FIGS.

  First, the configuration of the foreign material sample P used when confirming the operation of the foreign material detection device of this example will be described with reference to FIGS.

  The foreign material sample P shown in FIG. 4A or 4B is prepared for each type (material) of the foreign material, and is used when an X-ray detection unit 3A described later is adopted as the detection unit 3. The foreign material sample P in FIG. 4A is one in which a single foreign material 11 is integrated into a sheet-like main body 12 using a resin material. FIG. 4A shows an example in which an aluminum sphere having a diameter of φ3.0 mm is integrated into the main body 12 as one foreign substance 11. The foreign material sample P includes an information identifier 13 indicating the type and size (including shape) of the foreign material. The information identifier 13 is provided as a metal film having an adjusted thickness on the leading edge (the leading edge on the transport direction side) of the main body 12. Specifically, by dividing the width direction (short direction of the main body 12) orthogonal to the transport direction on the transport unit 2, by adjusting the thickness of the metal film for each of the divided areas, The position information of the foreign material 11 from the front end edge of the main body 12 and the information on the type and size (including shape) of the foreign material 11 are shown. The information identifier 13 identifies the position, type, and size (including shape) of the foreign substance 11 in the main body 12 of the foreign substance sample P from the difference in the amount of X-ray transmission when X-rays are exposed.

  In the foreign material sample P of FIG. 4B, a plurality of foreign materials 11 (11a, 11b, 11c, 11d, 11e, 11f) having different sizes are integrally incorporated into a sheet-like main body 12 using a resin material. It is a thing. In FIG. 4B, six aluminum spheres of φ2.0 mm, φ3.0 mm, φ4.0 mm, φ5.0 mm, φ6.0 mm, and φ7.0 mm are formed into a plurality of foreign matters 11 (11a, 11b, 11c having different sizes. , 11d, 11e, 11f), which are arranged in a line at predetermined intervals and integrated into the main body 12. The foreign material sample P includes an information identifier 13 indicating the type and size (including shape) of the foreign material. The information identifier 13 is provided as a metal film having an adjusted thickness on the leading edge (the leading edge on the transport direction side) of the main body 12. Specifically, by dividing the width direction (short direction of the main body 12) orthogonal to the transport direction on the transport unit 2, by adjusting the thickness of the metal film for each of the divided areas, Position information of each foreign object 11a, 11b, 11c, 11d, 11e, 11f from the front end edge of the main body 12 and information on the type and size (including shape) of each foreign object 11a, 11b, 11c, 11d, 11e, 11f Represents. This information identifier 13 is the position, type, and size (shape) of each foreign matter 11a, 11b, 11c, 11d, 11e, and 11f in the main body 12 of the foreign matter sample P due to the difference in the amount of X-ray transmission when X-rays are exposed. Are included).

  The foreign material sample P of FIG. 4C is prepared for each type (material) and size of the foreign material, and is used when a metal detection unit 3B described later is adopted as the detection unit 3. The foreign material sample P in FIG. 4C is obtained by integrating one foreign material 11 into a rectangular piece-shaped main body 12 made of a resin material. FIG. 4C shows an example in which an Fe sphere of φ2.0 mm is integrated into the main body 12 as one foreign substance 11. As the information for specifying the position, type, and size (including shape) of the foreign substance 11 in the main body 12, for example, a tag, a mark, a barcode, etc. An information identifier 13 such as an IC tag is provided. The information identifier 13 is read by the foreign material sample information acquisition means 8 provided on the entrance side of the transport unit 2 in front of the detection unit 3 to be described later, and the position, type, and size of the foreign material 11 in the main body 12 of the foreign material sample P ( Including shape).

  Here, FIG. 5 shows a specific example of the size (diameter) when the material (type) of the foreign material 11 incorporated integrally in the foreign material sample P is Fe and SUS. As shown in the figure, when the material of the foreign material 11 is SUS, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 2.0 mm, 2.4 mm, 2.5 mm, 2.8 mm, 3.0 mm , 3.5 mm, 4.0 mm, 4.8 mm, 6.0 mm, 7.2 mm, 8.0 mm, and 9.6 mm (φ: diameter). Further, when the material of the foreign material 11 is Fe, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 2.0 mm, 2.5 mm, 2. 20 types of sizes (φ: 8 mm, 3.0 mm, 4.0 mm, 4.8 mm, 5.6 mm, 6.0 mm, 6.4 mm, 7.2 mm, 8.0 mm, 8.8 mm, 9.6 mm) Diameter).

  As described above, the size of the foreign material 11 integrated into the foreign material sample P differs depending on the material (type) of the foreign material 11, and there are many types of the size. In addition, the foreign matter sample P to be used varies depending on the type of the inspection object W, and it is necessary to check whether the detection sensitivity corresponding to the type and size of the foreign object 11 is obtained for each type of the inspection object W. There is.

  Next, the configuration of the foreign object detection device 1 (1A) of the first embodiment will be described with reference to FIG. As shown in FIG. 1, the foreign object detection device 1 (1 </ b> A) according to the first embodiment includes a conveyance unit 2, a detection unit 3, a setting unit 4, a foreign object determination unit 5, an operation confirmation processing unit 6, and a display unit 7. Outlined.

  The conveyance unit 2 sequentially conveys the inspected object W (foreign substance sample P in the test mode) of the variety set in advance by the setting unit 4 from various varieties such as raw meat, fish, processed food, and medicine. For example, it is comprised with the belt conveyor arrange | positioned horizontally with respect to the apparatus main body. The conveyance unit 2 carries out the inspection object W (or the foreign matter sample P) carried in from the carry-in port in the direction of the arrow in FIG. 1 at a predetermined carry speed set by driving a drive motor (not shown) to the carry-out port. ing.

  The detection unit 3 can output a signal in response to the foreign matter contained in the inspection object W or the foreign matter 11 of the foreign matter sample P. The detection unit 3 is configured as shown in FIG. It comprises a metal detector 3B having a configuration. The X-ray detector 3 </ b> A shown in FIG. 6 includes an X-ray generator 21 and an X-ray detector 22. The X-ray generator 21 has a configuration in which a cylindrical X-ray tube provided inside a metal box is immersed in an insulating oil. The X-ray generator 21 irradiates an anode target with an electron beam from the cathode of the X-ray tube. Is generated. The X-ray tube is provided so that its longitudinal direction is orthogonal to the conveyance direction of the inspection object W (or the foreign material sample P). The X-rays generated by the X-ray tube are exposed to the lower X-ray detector 22 in the form of a substantially triangular screen through a substantially conical X-ray through a slit along the longitudinal direction. It is like that.

  The X-ray detector 22 detects X-rays that pass through the inspection object W (or the foreign material sample P) when the X-rays are exposed to the inspection object W (or the foreign material sample P). An electric signal corresponding to the detected transmission amount of the X-ray is output. The X-ray detector 22 includes, for example, a plurality of photodiodes arranged in a line in a direction orthogonal to the conveyance direction of the inspection object W (or foreign material sample P) conveyed on the belt conveyor forming the conveyance unit 2. An array line sensor including a scintillator provided on a photodiode is used.

  In the X-ray detection unit 3A having such a configuration, when the X-ray generator 21 emits X-rays to the inspection object W (or the foreign material sample P), the inspection object W (or the foreign material sample P). X-rays transmitted through the X-ray detector 22 are received by the scintillator of the X-ray detector 22 and converted into light. Further, the light converted by the scintillator is received by the photodiode of the X-ray detector 22 disposed below the scintillator. Each photodiode converts the received light into an electrical signal and outputs it (detection output).

  The metal detection unit 3B shown in FIG. 7 includes a signal generator 31, a transmission coil 32, a magnetic field change detection unit 33 having two reception coils 33a and 33b, and a detection unit 34.

  The signal generator 31 outputs a signal having a predetermined frequency. The transmission coil 32 receives a signal from the signal generator 31 and generates an alternating magnetic field having a predetermined frequency in the conveyance path of the inspection object W (or the foreign material sample P).

  The two receiving coils 33a and 33b are arranged along the conveying direction of the inspection object W (or the foreign matter sample P) at positions where the alternating magnetic field generated by the transmitting coil 32 is received in equal amounts, and are differentially connected to each other. The magnetic field change detection unit 33 detects a signal corresponding to a magnetic field change caused by an object passing through an alternating magnetic field.

  The detector 34 synchronously detects the output signal of the magnetic field change detector 33 with a signal having the same frequency as the signal generated by the signal generator 31.

  In the metal detector 3B having such a configuration, when the inspection object W (or the foreign material sample P) is not present in the alternating magnetic field, the amplitudes of the signals generated in the two receiving coils 33a and 33b are equal and the phases are the same. Since the inverted equilibrium state is obtained, the amplitude of the signal becomes zero, and the output of the detection unit 34 also becomes zero (detection output). On the other hand, when the inspection object W (or foreign material sample P) is present in an alternating magnetic field, the inspection object W (or foreign material sample P) itself and the metal mixed in the inspection object W are included. (Or the foreign object 11 of the foreign object sample P) causes the balanced state of both signals generated in the two receiving coils 33a and 33b to be lost, and the amplitude and phase with the movement of the inspection object W (or the foreign object sample P). Is output from the detector 34 (detection output).

  Here, FIGS. 8A and 8B are Lissajous waveform diagrams that two-dimensionally display the detection output of the metal detection unit 3B when the foreign material 11 having the same kind of metal and different size is detected as the foreign material sample P. FIG. is there. 8A and 8B, Ln represents the amplitude (level) of the detection output, and the angle formed by the line connecting the origin and the Q point and the x axis represents the phase. The Lissajous waveform obtained for the foreign material sample P of the foreign material 11 of the same kind and different in size has the same angle θ among the polar coordinates of the apex Q, and the distance r from the origin (corresponding to Ln in FIG. 8). ) Is a similar shape that changes according to the size of the foreign material 11.

  FIG. 9 shows the relationship between the ratio α between the non-defective sample and the detection output of each foreign material sample at the optimum detection phase and the size d of the foreign material of each foreign material sample. The amplitude (level) of the detection output in FIG. The ratio α increases as Ln increases, and the size (diameter) d of the foreign material 11 of the foreign material sample P changes greatly in proportion to the size of the ratio α.

  As described above, the detection output of the metal detection unit 3B has different amplitudes depending on the type of the foreign material sample P, and the phase of the same type of foreign material varies depending on the size of the foreign material. Therefore, the type and size of the foreign material sample P can be detected based on the amplitude and phase of the detection output of the metal detection unit 3B.

  The metal detector 3B is not limited to the configuration shown in FIG. 7. For example, a magnetic field in the inspection object W is magnetized by generating a direct current magnetic field for each type of inspection object W, The structure which detects a magnetism with a magnetic sensor may be sufficient.

  The setting unit 4 sets a product type that identifies the inspection object W to be transported by the transport unit 2, information that identifies a foreign material sample to be determined when performing an operation check using a foreign material sample corresponding to the product type, and a foreign material sample Various settings related to foreign object detection of the inspection object W, including manual switching setting to test mode in which operation check is performed using P and schedule setting (switching time setting, switching cycle setting) for automatically switching to test mode It consists of a plurality of keys and switches for giving settings and instructions.

  The foreign matter determination unit 5 determines whether or not a foreign matter is included in the inspection object W based on the detection output (detection signal) from the detection unit 3 and controls the determination result display.

  The operation confirmation processing unit 6 determines whether or not the detection unit 3 operates correctly using the foreign material sample P and controls the determination result display, and includes a foreign material sample storage unit 6a and an operation confirmation determination unit 6b. ing.

  The foreign matter sample storage means 6a is information (species and size (including shape) of the foreign matter 11) for specifying the foreign matter sample P to be judged by the operation confirmation judgment means 6b, and is transported by the transport unit 2. Information for identifying whether or not it is a foreign material sample P to be determined (information for identifying the information identifier 13) is stored as foreign material sample information for each type of inspection object W.

  The operation confirmation determination unit 6b performs control of information display regarding the foreign material sample P to be transported in the test mode, determination of whether or not the detection unit 3 operates correctly using the foreign material sample P, and control of the determination result display. Yes.

  More specifically, the operation confirmation determination unit 6b is configured to perform the foreign substance sample information to be performed with the type of the inspection object W already set in the setting unit 4 when the setting unit 4 is set to switch to the test mode. Is read from the foreign matter sample storage means 6a, and the read foreign matter sample information is displayed on the display unit 7.

  Further, when the operation confirmation determination unit 6b is switched to the test mode, whether or not the detection unit 3 operates correctly based on whether or not the detection output of the detection unit 3 is within an allowable range according to the type of the foreign material sample P. The determination result is displayed on the display unit 7.

  Further, the contents of determination processing by the operation confirmation determination means 6b will be described. First, when the X-ray detection unit 3A shown in FIG. 6 is adopted as the detection unit 3, the foreign material sample P corresponding to the foreign material sample information displayed on the display unit 7 is shown in FIGS. 4 (a) and 4 (b). ) Is used. Then, when the detection output (X-ray transmission amount) of the X-ray detection unit 3A when the foreign matter sample P is conveyed is input, the operation confirmation determination unit 6b filters the detection output so as to emphasize the foreign matter. If the level of the filtered signal is within the allowable level range, it is determined that the detection unit 3 is operating correctly. On the other hand, if the level of the signal after the filter processing is not within the allowable level range, it is determined that the detection unit 3 is not operating correctly. Then, the determination result at this time is displayed on the display unit 7.

  When the metal detector 3B shown in FIG. 7 is adopted as the detector 3, the foreign material sample having the configuration shown in FIG. 4C is used as the foreign material sample P corresponding to the foreign material sample information displayed on the display unit 7. P is used. Then, when the detection output (X-ray transmission amount) of the metal detection unit 3B when the foreign object sample P is conveyed is input to the operation confirmation determination unit 6b, the amplitude and phase of the detection output are within an allowable range. If so, it is determined that the detection unit 3 is operating correctly. On the other hand, if the amplitude and phase of the detection output are not within the allowable range, it is determined that the detection unit 3 is not operating correctly. Then, the determination result at this time is displayed on the display unit 7.

  Note that the operation confirmation determination result is not limited to each operation confirmation for one foreign substance sample P. For example, when there are a plurality of foreign matter samples P to be performed with the set product type, a list may be displayed when the operation confirmation determination for all foreign matter samples P is completed.

  The display unit 7 is composed of, for example, a liquid crystal display or the like, and includes various setting screens for performing various settings and instructions including setting of a product for specifying the inspection object W and setting of switching to a test mode in the setting unit 4. Display of an operation confirmation screen including foreign material sample information to be performed with the set product type of the inspection object W when switching to display and test mode is set (FIG. 10A), determination result display by the foreign material determination unit 5, operation confirmation processing unit 6 shows the determination result display for each type and size of the foreign matter sample P (FIG. 10B).

  Next, the operation of the foreign object detection device 1A according to the first embodiment having the above-described configuration will be described. First, the type of inspection object W is set in the setting unit 4, and in the state where the inspection object W of the set type is being conveyed by the conveyance unit 2 (in the normal foreign object detection mode state), foreign object determination is performed. The unit 5 determines whether or not a foreign object is included in the inspection object W based on the detection output of the detection unit 3 (signal level after filtering of the amount of X-ray transmission, amplitude and phase of the detection signal). . Then, the determination result is displayed on the display unit 7.

  In contrast, when the setting unit 4 is switched to the test mode, the operation confirmation processing unit 6 determines the foreign material sample to be determined corresponding to the type of the inspection object W that has already been set by the setting unit 4. Information is read from the foreign material sample storage means 6a, and the read foreign material sample information is displayed on the operation confirmation screen of the display unit 7 shown in FIG. 10, for example. In the operation confirmation screen of FIG. 10A, Fe having a size (diameter: φ) of 2.0 mm is incorporated as the foreign material 11 as the foreign material sample P to be determined corresponding to the “candy” which is the type of the inspection object W. A comment indicating that the foreign material sample P is flowed first (No. 001) is displayed, and the operator is prompted to convey the foreign material sample P.

  Thereafter, the operation confirmation processing unit 6 determines whether or not the detection unit 3 operates correctly based on whether or not the detection output of the detection unit 3 is within an allowable range according to the type of foreign matter sample P to be determined. judge. Then, the determination result is displayed on the display unit 7. In FIG. 10 (b), as the foreign material 11 of the foreign material sample P conveyed to the 77th (No. 077) at 12:34:56 on July 7, 2007, Fe of φ0.6 mm, SUS of φ1.0 mm, It is determined that all of the SUS wire of φ1.5 mm and φ2.0 mm × 5 mm are normal, and the determination result indicating that the operation check is normal is displayed at 12:35:31 on July 7, 2007. If there is an abnormality item in the determination result, the abnormality is displayed in the corresponding part.

  As described above, in the foreign object detection device 1A according to the first embodiment, the setting is performed when the setting unit 4 has already been set to change the test mode from the state in which the product type for specifying the inspection object W has been set. The foreign material sample information to be performed with the selected product type is read from the foreign material sample storage means 6a, and the read foreign material sample information is displayed on the display unit 7 as an operation confirmation screen as shown in FIG. 10A, for example. . As a result, the operator can reliably recognize the foreign material sample P to be determined by looking at the foreign material sample information displayed on the display unit 7 as the operation confirmation screen, and accidentally throw the wrong type of foreign material sample. Can be prevented. As a result, the work efficiency can be improved, and the risk that the operation check test of the detection unit 3 is not correctly performed is reduced.

  When the switching to the test mode using the foreign material sample P is performed, the detection output of the detection unit 3 is within an allowable range according to the type and size (including dimensions) of the foreign material 11 of the foreign material sample P to be determined. Whether or not the detection unit 3 operates correctly is determined based on whether or not the image is within the range, and the determination result is displayed on the display unit 7. Thereby, the risk that the operation check test is not correctly performed can be further reduced.

  Further, as shown in FIG. 10 (b), the types of foreign matter samples P corresponding to the type of the inspection object W and the operation confirmation determination result for each size are displayed in a list, so that it corresponds to the type of the inspection object W. It can be confirmed whether or not the confirmed operation has been performed correctly.

  Next, the foreign object detection device 1 (1B) of the second embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as the foreign material detection apparatus 1A of 1st Embodiment, and the description is abbreviate | omitted.

  The foreign object detection device 1B of the second embodiment includes the foreign object sample information acquisition means 8 in the detection unit 3 adopting the X-ray detection unit 3A in the foreign object detection device 1A of the first embodiment described above, and the operation check processing unit 6 Is further provided with a collating means 6c.

  In the foreign matter detection apparatus 1B of the second embodiment, the foreign matter sample P having the configuration shown in FIGS. 4A and 4B is used as the foreign matter sample P corresponding to the foreign matter sample information displayed on the display unit 7. Is done.

  The foreign matter sample information acquisition means 8 determines the foreign matter 11 of the foreign matter sample P represented by the information identifier 13 from the X-ray transmission amount when the X-ray detection unit 3A exposes the X-ray to the information identifier 13 of the foreign matter sample P. Foreign material sample information indicating the type and size (including shape) is acquired.

  The collation means 6c collates the foreign substance sample information acquired by the foreign substance sample information acquisition means 8 with the foreign substance sample information of the foreign substance sample P to be determined stored in the foreign substance sample storage means 6a, and the collation result is displayed on the display unit 7. It is displayed.

In addition, since the foreign substance sample information acquisition means 8 in 2nd Embodiment uses the detection output (X-ray permeation | transmission amount) from 3 A of X-ray detection parts, it is good also as a structure included in the operation confirmation process part 6. FIG.
Further, the foreign matter sample information acquisition means 8 acquires foreign matter sample information from the information identifier 13 of the foreign matter sample P. However, in the foreign matter sample P in which the foreign matter 11 is arranged as shown in FIG. The case where there is no identifier 13 may be sufficient. In that case, the signal level from the detection unit 3 corresponding to the foreign substance 11 corresponding to the arrangement, foreign substance size, and type is registered in the foreign substance sample information acquisition means 8 in advance. And the foreign material sample information acquisition means 8 extracts a foreign material based on the signal from the detection part 3, and when the extracted arrangement | sequence of the foreign material corresponds with the arrangement | sequence registered, the registered information is used as foreign material sample information. get.

  Next, the foreign object detection device 1 (1C) of the third embodiment will be described with reference to FIG. In addition, the same number is attached | subjected to the component same as the foreign material detection apparatus 1A of 1st Embodiment, and the description is abbreviate | omitted.

  The foreign object detection device 1C of the third embodiment is the foreign object detection device 1A of the first embodiment described above, and includes a foreign material sample information acquisition unit 8 on the carry-in side of the transport unit 2 in front of the detection unit 3, and an operation check process The unit 6 further includes a collating means 6c.

  In the foreign matter detection apparatus 1C of the third embodiment, the foreign matter sample P having the configuration shown in FIG. 4C is used.

  The foreign material sample information acquisition means 8 is configured by an imaging device such as a camera or a reading device such as a barcode reader, for example, and reads the information identifier 13 of the foreign material sample P to determine the type and size (the shape of the foreign material 11 of the foreign material sample P). Foreign matter sample information indicating "included" is acquired.

  The collation means 6c collates the foreign substance sample information acquired by the foreign substance sample information acquisition means 8 with the foreign substance sample information of the foreign substance sample P to be determined stored in the foreign substance sample storage means 6a, and the collation result is displayed on the display unit 7. It is displayed. If the collation results do not match, for example, a message such as “Please run a correct sample because the samples do not match” is displayed in the lower column of the operation confirmation screen in FIG.

  Note that the foreign matter sample storage means 6a in the foreign matter detection device 1 of each of the embodiments described above includes a series of operation confirmation histories including the determination results for each type of the inspection object W based on the determination results of the operation confirmation determination means 6b (second In the third embodiment, the collation result of the information acquired by the foreign substance sample information acquisition means 8 may be stored. In this case, the operation check history stored in the foreign material sample storage means 6a is, for example, printed out by a printer, transferred to various external storage media, and connected to an external terminal device according to an instruction from the setting unit 4. The transmission output according to can be appropriately performed as necessary. Thereby, even after the operation confirmation is completed, a series of operation contents including the determination result can be confirmed, and can be used for quality management as a quality record.

  In addition, according to the foreign matter detection devices 1B and 1C of the second and third embodiments described above, not only the same effect as the foreign matter detection device 1A of the first embodiment is obtained, but also the foreign matter actually conveyed at the time of confirming the operation. Can recognize samples.

  In addition, the foreign material sample actually transported at the time of the operation check can be compared with the foreign material sample to be judged (conveyed), and the result of the verification is displayed. The operator can be urged to transport the work and work efficiency can be improved.

  Further, although not shown in the figure, if a configuration in which a sounding means such as a speaker or a buzzer is operated when the collation by the collating means 6c does not match, the operator may be informed by sound that the correct foreign matter sample P is not flowing. it can.

  Incidentally, the foreign object detection device 1 of the present example is premised on performing the operation confirmation process using the foreign object sample P when the setting unit 4 is set to switch to the test mode. In the foreign matter detection devices 1B and 1C of the third embodiment, when the foreign matter sample information acquisition means 8 acquires foreign matter sample information from the inspection object W, the operation of the detection unit 3 is confirmed from the normal foreign matter detection mode. A configuration for shifting to the test mode may be employed. For example, as shown in FIG. 11, the foreign matter sample information acquisition means 8 has foreign matter sample determination means 8a, and mode switching means for switching modes (foreign matter detection mode, test mode) based on the determination result of the foreign matter sample determination means 8a. 9 is provided. In this configuration, the foreign material sample determination means 8a determines whether or not the inspection object W is a foreign material sample based on the presence or absence of the foreign material sample information with respect to the inspection object W sequentially conveyed during the foreign object inspection operation. . The mode switching means 9 switches the mode from the normal foreign object detection mode in which the foreign object determination process is executed to the test mode in which the operation confirmation process is executed when it is determined that the inspection object W is a foreign object sample. Switch. Then, the mode switching unit 9 switches the mode so as to return from the test mode to the normal foreign object detection mode when the operation confirmation process in the test mode is completed.

  In this way, it is possible to automatically shift to the test mode using the foreign material sample to be determined without performing the test mode switching setting in the setting unit 4. Therefore, even if the line is in operation, it is possible to perform the operation confirmation process without transferring the foreign material sample to the subsequent stage. As a result, since the operation confirmation process can be performed by automatically shifting to the test mode even in an operating line, there is an effect that the load on the operator can be reduced and the work efficiency can be increased.

  The operation confirmation processing unit 6 confirms the operation of the detection unit 3 based on whether or not the detection output of the detection unit 3 is within an allowable range corresponding to the information specifying the foreign substance sample P. In addition to the operation check of the detection unit 3, it can be configured to check whether or not the foreign object determination is performed under the same conditions as the foreign object determination unit 5.

  In addition, the foreign object detection apparatus 1 of this example is configured to detect foreign objects while being incorporated in a part of the production line and sequentially transporting the inspection object W by the conveyance unit 2, but the inspection object W is detected by the apparatus alone. A configuration in which the foreign matter is detected by flowing through the detection unit 3 one by one may be used.

It is a block block diagram which shows 1st Embodiment of the foreign material detection apparatus which concerns on this invention. It is a block block diagram which shows 2nd Embodiment of the foreign material detection apparatus which concerns on this invention. It is a block block diagram which shows 3rd Embodiment of the foreign material detection apparatus which concerns on this invention. (A)-(c) It is a figure which shows the structural example of the foreign material sample used when confirming operation | movement with the foreign material detection apparatus which concerns on this invention. It is a figure which shows the specific example of the kind and magnitude | size of a foreign material sample. It is a block diagram of the X-ray detection part which makes the detection part of the foreign material detection apparatus which concerns on this invention. It is a block diagram of the metal detection part which makes the detection part of the foreign material detection apparatus which concerns on this invention. (A), (b) It is the Lissajous waveform figure which displayed the detection output of the metal detection part when detecting the foreign material from which the magnitude | size differs with the same kind of metal two-dimensionally. It is a figure which shows the relationship between the ratio of the good quality sample in the optimal detection phase, and the detection output of each foreign material sample, and the magnitude | size of the foreign material of each foreign material sample. (A), (b) It is a figure which shows the example of an operation confirmation screen of the foreign material detection apparatus which concerns on this invention, and an example of an operation confirmation result output. It is a block diagram which shows a part of other structure of the foreign material detection apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 (1A, 1B, 1C) Foreign object detection apparatus 2 Conveyance part 3 Detection part 3A X-ray detection part 3B Metal detection part 4 Setting part 5 Foreign substance determination part 6 Operation | movement confirmation process part 6a Foreign substance sample storage means 6b Operation | movement confirmation determination means 6c Verification Means 7 Display unit 8 Foreign matter sample information obtaining means 8a Foreign matter sample determining means 9 Mode switching means 11 (11a to 11f) Foreign matter 12 Body 13 Information identifier 21 X-ray generator 22 X-ray detector 31 Signal generator 32 Transmitting coil 33a, 33b Reception coil 33 Magnetic field change detection unit 34 Detection unit W Inspection object P Foreign material sample

Claims (4)

A detector (3) for outputting a signal in response to a foreign substance contained in the inspection object (W);
A foreign matter determination unit (5) for determining whether or not a foreign matter is included in the inspection object based on a signal from the detection unit;
An operation confirmation processing unit (6) for determining whether or not the detection unit operates correctly using the foreign material sample (P);
In the foreign object detection device (1) comprising a display unit (7) for displaying the result determined by the foreign object determination unit and the result determined by the operation confirmation processing unit,
In the operation check processing unit, a plurality of foreign matter samples to be determined to be specified for each product type are set, and the signal level of the detection output of the detection unit is within an allowable range set according to the type of the foreign matter sample A foreign object detection device that determines whether or not the detection unit operates correctly based on whether or not, and displays a list of results of the determination on the display unit in association with the type of the foreign material sample . The foreign matter detection device according to claim 1 , further comprising foreign matter sample information acquisition means (8) for acquiring foreign matter sample information for specifying a foreign matter from the foreign matter sample (P) . The operation confirmation processing unit (6) includes the foreign material sample information acquired by the foreign material sample information acquisition unit (8) and the foreign material to be determined by the operation confirmation processing unit stored in the foreign material sample storage unit (6a). 3. The foreign matter detection device according to claim 2, further comprising collating means (6c) for collating with information for specifying a sample . Foreign matter sample information acquisition means (8) for acquiring foreign matter sample information from the foreign matter sample (P),
When the foreign matter sample information acquisition means acquires foreign matter sample information from the object to be inspected, the foreign matter sample information acquisition means shifts to a test mode for confirming the operation of the detection unit, and operates the detection unit by the operation confirmation processing unit. foreign matter detecting apparatus according to claim 1, wherein the confirmation is performed.

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