JP2012108023A - Method and apparatus for measuring each component concentration in suspension to be used for wet fluorescent magnetic particle flaw detection test - Google Patents

Abstract

[PROBLEMS] A wet fluorescent magnetic particle flaw detection with improved measurement accuracy and workability, capable of simultaneously measuring the concentration of a dispersant and fluorescent magnetic powder in a test solution by a simple method, and enabling the concentration to be measured instantaneously and with high accuracy. Provided are a method and an apparatus for measuring a component concentration of a test liquid used in a test.
A wet method for flaw detection by bringing a test liquid mixed with at least fluorescent magnetic powder into contact with a magnetized metal surface of an object to be inspected, and collecting and adhering the fluorescent magnetic powder to the surface flaw. In the method and apparatus for measuring the component concentration of the test liquid used for the fluorescent magnetic particle flaw detection test, the test liquid is introduced into the transparent measuring tool 3, and the light from the light source 4 is irradiated to the test liquid from one side of the measuring tool 3. Based on the detection value of the ultraviolet detector 5 that detects the transmitted light and the detection value of the fluorescence luminance detector 6 that detects the visible light excited and emitted, using the transmitted light and the visible light excited and emitted. To measure the concentration of the dispersant.
[Selection] Figure 6

Description

  The present invention is a wet method for flaw detection by bringing a test liquid obtained by mixing at least fluorescent magnetic powder into contact with a magnetized metal surface of an object to be inspected, and collecting and adhering the fluorescent magnetic powder to the surface flaw. More particularly, the present invention relates to a method and an apparatus for measuring the concentration of each component in a test liquid.

The wet fluorescent magnetic particle flaw detection test is standardized by JIS-Z-2320, which is generally applied to flaw detection inspection of steel materials such as billets and parts such as automobile shafts. This is because, by magnetizing the object to be inspected, if the surface layer part of the object to be inspected has a scratched part, a magnetic pole is generated at this scratched part. It is a well-known nondestructive inspection method as described in Patent Documents 1 and 2, for example. Since the magnetic powder to be attached to the scratched part uses fluorescent magnetic powder, the ultraviolet light is irradiated in the dark room, and the phosphor of the fluorescent magnetic powder attached to the damaged part emits light to improve the visibility and facilitate the inspection. Effect is obtained. The inspection liquid applied to the inspection is generally composed of fluorescent magnetic powder of several μm to several tens μm, water or white kerosene, a predetermined dispersant, and a predetermined rust preventive. In the flaw detection inspection, the content of the fluorescent magnetic powder in the inspection liquid is an important factor that affects the visibility and detection limit of the scratched part. A general method for measuring the concentration of the fluorescent magnetic powder in the test solution is a method using a sedimentation tube (non-destructive inspection series, magnetic particle testing 3P82 to 83). In this method, a well-stirred and suspended test solution was collected from a spray nozzle, and the sedimentation tube was allowed to stand for 30 minutes, and then the volume of sediment deposited on the bottom of the sedimentation tube was determined.

JP 2009-109424 A JP 2007-303824 A

However, in the method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test as described above, the concentration measurement value varies when the amount of precipitation increases due to sampling conditions or contamination with foreign matter such as scale and dust. Was produced. Therefore, in order to solve this problem, a method of measuring the brightness of the phosphor adhering to the pseudo defect as a guide (Japanese Patent Laid-Open No. 7-113787) or a method of measuring the brightness by reading the image with a CCD and processing the image. (JP 2009-75098 A), and further, a method (JP-A 5-215724) for measuring the electromagnetic characteristics and fluorescence luminance of iron powder in combination has been proposed, but the magnetization state of the test piece having pseudo defects, Variations in measurement results are unavoidable due to spraying methods. Further, the sampling operation described above is troublesome and there is a problem that workability is poor.

  Furthermore, only the concentration of the fluorescent magnetic powder can be measured by the method for measuring the component concentration of the test liquid described above. By the way, the concentration of the fluorescent magnetic powder in the test solution affects the visibility of the flaw detection, and the concentration of the dispersant determines the wettability of the test solution to the object to be inspected. As a method for evaluating the dispersant, the standard surface of the surface roughness standard piece and one surface of the transparent plate, which are disclosed in JP-A-8-128993, are fixed in a state where they face each other at a required interval, and the both surfaces are vertical. In a measuring device installed in a posture, the lower end of the sample is immersed in the sample, and the rising value of the sample rising by capillary action is measured, and the wettability of the dispersant in the test liquid is measured by the measured value. However, it does not measure the concentration of the dispersant itself, and a separate measuring device must be provided only for the evaluation of the dispersant, which increases costs and reduces work efficiency. There was also a problem.

  Therefore, as described in Japanese Patent Application No. 2010-107561, the inventors of the present application irradiate the test liquid with ultraviolet light from an ultraviolet LED lamp as a light source, and transmit transmitted light obtained from the test liquid and excited visible light. A method and apparatus for measuring the concentration of the fluorescent magnetic powder and the concentration of the dispersant contained in the test liquid based on the detection values detected by the ultraviolet detector and the fluorescence luminance detector, respectively, have been developed.

  However, most of the test liquid is prepared in the test liquid tank and applied to the magnetized object to be inspected, and then the surplus test liquid is collected and sprayed again on the object to be inspected. When surface treatment such as shot blasting is performed on the inspected object in the previous process, scales such as iron scrap generated by this surface treatment adhere to the inspected object, and the inspected object to which this scale adheres is inspected. When the liquid is applied, the scale mixed in the excess test liquid is also collected in the test liquid tank. Since this scale is a ferromagnetic material such as iron oxide, during the flaw detection, the adhesion of the fluorescent magnetic powder to the flaw portion is hindered, and the flaw detection accuracy is remarkably lowered.

  Therefore, it is necessary to grasp and manage the concentration of scale contained in the test solution. Conventionally, the concentration of components other than the fluorescent magnetic powder and dispersant contained in the test solution, such as the concentration (content) of this scale Cannot be measured, and there is a problem in that the detection performance of the flaws in the flaw detection test is low.

  Accordingly, the object of the present invention is to simultaneously measure the concentration of each component in the test liquid, such as the scale contained in the test liquid, the fluorescent magnetic powder, the dispersant, and the rust preventive that constitute the test liquid, and those Provided are a method and an apparatus for measuring a component concentration of a test liquid used in a wet fluorescent magnetic particle flaw detection test which can improve the detection performance and workability of a flaw in a flaw detection test, which can measure the concentration instantaneously and with high accuracy. Is.

  For this reason, according to the first aspect of the present invention, the test liquid obtained by mixing at least the fluorescent magnetic powder is brought into contact with the surface of the magnetized metal of the object to be inspected, and the fluorescent magnetic powder is assembled and adhered to the scratched portion of the surface. The component concentration measurement method of the test liquid used in the wet fluorescent magnetic particle flaw detection test for flaw detection by performing the test, wherein the component concentration measurement method introduces the stirred test solution into a transparent measuring instrument. The detector for detecting the transmitted light using the transmitted light obtained by irradiating the test solution from one side of the measuring instrument and the visible light excited and emitted, and the excited light The concentration of each component of the test solution is measured from the change in each detection value of the detector that detects the emitted visible light and the change in the detection value of each detector obtained by the difference in the sedimentation characteristics of each component over time. It is characterized by that.

  According to a second aspect of the present invention, in the method for measuring a component concentration of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, the light source is an ultraviolet LED lamp or an infrared LED lamp.

  According to a third aspect of the present invention, in the component concentration measurement method for a test liquid used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, the detectors that detect the transmitted light are an ultraviolet detector and an infrared detector. It is characterized by that.

  According to a fourth aspect of the present invention, in the method for measuring a component concentration of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, the ultraviolet detector and the infrared detector sandwich the measuring tool and the light source. It is characterized in that it is installed at the opposite position.

  A fifth aspect of the present invention is the method of measuring a concentration of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, wherein each of the components includes fluorescent magnetic powder, a dispersant, and a scale. Features.

  According to the sixth aspect of the present invention, the test liquid obtained by mixing at least the fluorescent magnetic powder is brought into contact with the surface of the magnetized metal of the object to be inspected, and the fluorescent magnetic powder is collected and adhered to the scratched portion of the metal surface. A component concentration measuring device for the test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection of the scratched part, the component concentration measuring device comprising: a measuring tool for introducing the test solution; and a flow of the test solution A pump to be controlled, an ultraviolet LED lamp as a light source for irradiating the test liquid in the measuring tool with ultraviolet light, an infrared LED lamp as a light source for irradiating the test liquid in the measuring tool with infrared light, and An ultraviolet detector for detecting transmitted light obtained from the test liquid, an infrared detector for detecting transmitted light obtained from the test liquid by the infrared irradiation, and obtained from the test liquid by the ultraviolet irradiation. Fluorescence luminance detector for detecting visible light emitted by excitation, and each detection by the ultraviolet detector, the infrared detector and the fluorescence luminance detector of the test liquid when the pump is operated and stopped And an information processing unit for calculating the concentration of the fluorescent magnetic powder, the concentration of the dispersing agent, the concentration of the rust inhibitor, and the scale concentration contained in the test solution, respectively, based on the values.

  The invention according to claim 7 is the component concentration measuring apparatus for the test liquid used in the wet fluorescent magnetic particle flaw detection test according to claim 6, wherein the measuring tool is installed in a dark box, and the ultraviolet LED lamp, The infrared LED lamp, the ultraviolet detector, the infrared detector, and the fluorescence luminance detector are provided in the dark box.

  According to an eighth aspect of the present invention, there is provided a test liquid tank for storing a test liquid formed by mixing at least fluorescent magnetic powder, and the test liquid in the test liquid tank is taken out by a circulation means and is returned to the test liquid tank. A wet-type fluorescent magnetic particle flaw detection tester comprising: a transfer means that causes the test liquid in the transfer means to contact the magnetized metal surface of the object to be inspected to detect a flaw on the surface. The transfer means includes the component concentration measuring device according to claim 6, which measures the component concentration of the test liquid, and the transfer means is for testing the test liquid to pump the test liquid to the flaw detection unit. It is piping, Comprising: The said measuring tool of the said component concentration measuring apparatus was connected to this test piping, It is characterized by the above-mentioned.

  According to the first aspect of the present invention, the surface of the magnetized metal of the object to be inspected is brought into contact with a test liquid obtained by mixing at least the fluorescent magnetic powder, and the fluorescent magnetic powder is collected and adhered to the scratched surface. The component concentration measurement method of the test liquid used in the wet fluorescent magnetic particle flaw detection test for flaw detection, wherein this component concentration measurement method introduces the stirred test solution into a transparent measuring instrument, A detector for detecting transmitted light and a detector for detecting visible light excited and emitted using transmitted light obtained by irradiating the test solution from one side of the measuring instrument and visible light excited and emitted. From the change in the detection value of each detector obtained by the difference in the sedimentation characteristics with the passage of time of each detection value and each component, the concentration of each component of the test solution is measured, so by a simple configuration using an optical method, Concentration of each component contained in the test solution Instantaneous and accurate, it can be easily measured.

  In particular, when flaw detection is performed on the object to be inspected, it is mixed in the concentration of scale mixed in the test solution that inhibits the attachment of fluorescent magnetic powder to the scratched part and significantly reduces the flaw detection accuracy, and other test solutions. It is possible to easily measure the concentration of each component contained in a test solution that could not be measured conventionally, such as a rust inhibitor. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test which enables measurement of each component concentration and improves measurement accuracy and workability.

  According to the second aspect of the present invention, the light source is an ultraviolet LED lamp or an infrared LED lamp, and therefore, using two types of electromagnetic waves having different wavelengths, from the components contained in the test solution and the test solution, the components Various types of measurement data necessary for concentration calculation can be obtained, and the service life of a light source lamp that absorbs and excites light in a test solution can be extended, thereby reducing costs. Accordingly, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test, which enables measurement of each component concentration and improves productivity.

  According to the invention described in claim 3, since the detector for detecting the transmitted light is an ultraviolet detector and an infrared detector, the absorption concentration and sedimentation characteristics of each component contained in the test solution are different in wavelength. It can be obtained for each of the two types of electromagnetic waves, and the concentration of each component in the test solution can be accurately and easily calculated based on these values together with the measured values of the fluorescence luminance. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test which enables measurement of each component concentration and improves measurement accuracy and workability.

  According to the invention described in claim 4, since the ultraviolet detector and the infrared detector are installed at a position opposite to the light source with the measuring tool sandwiched therebetween, the ultraviolet LED lamp and the infrared LED lamp are incident on the test solution, The transmitted light of ultraviolet rays and infrared rays transmitted substantially straight through can be accurately and stably measured as the absorbance concentration of each component. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test with a simple configuration and improved measurement accuracy.

  According to the fifth aspect of the present invention, each component includes fluorescent magnetic powder, a dispersant, and a scale. Therefore, when flaw detection is performed on the object to be inspected, the adhesion of the fluorescent magnetic powder to the flaw is inhibited. Easily adjust the concentration of each component contained in the test solution, which could not be measured in the past, such as the concentration of scale mixed in the test solution that would significantly reduce the accuracy, and other anti-corrosive agents mixed in the test solution Can be measured. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test which enables measurement of each component concentration and improves measurement accuracy and workability.

  According to the sixth aspect of the present invention, the test liquid formed by mixing at least the fluorescent magnetic powder is brought into contact with the magnetized metal surface of the object to be inspected, and the fluorescent magnetic powder is collected and adhered to the scratched portion of the metal surface. Is a component concentration measuring device for a test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection by using a measuring tool for introducing the test solution, a pump for controlling the flow of the test solution, and the like. , An ultraviolet LED lamp as a light source for irradiating the test liquid in the measuring tool with ultraviolet light, an infrared LED lamp as a light source for irradiating the test liquid in the measuring tool with infrared light, and transmitted light obtained from the test liquid by the ultraviolet irradiation UV detector that detects UV light, infrared detector that detects the transmitted light obtained from the test solution by infrared irradiation, and fluorescent light that detects the excited and emitted visible light obtained from the test solution by UV irradiation. Based on the detection values of the detector and the inspection liquid at the time of operation and stoppage of the pump by the ultraviolet detector, the infrared detector and the fluorescence luminance detector, the concentration of the fluorescent magnetic powder contained in the inspection liquid and the dispersant Since the information processing unit for calculating the concentration, the rust inhibitor concentration, and the scale concentration is provided, the concentration of each component contained in the test liquid can be easily measured with high accuracy and instantaneously.

  In particular, when flaw detection is performed on the object to be inspected, it is mixed in the concentration of scale mixed in the test solution that inhibits the attachment of fluorescent magnetic powder to the scratched part and significantly reduces the flaw detection accuracy, and other test solutions. It is possible to easily measure the concentration of each component contained in a test solution that could not be measured conventionally, such as a rust inhibitor. Therefore, it is possible to provide a component concentration measuring apparatus for a test liquid used for a wet fluorescent magnetic particle flaw detection test that enables measurement of each component concentration and improves measurement accuracy and workability.

  Furthermore, this component concentration measuring device is not limited to the installation location, but can be incorporated into a flaw detection test device, or the component concentration measuring device can be carried as a measurement unit, and the component concentration of a sampled test solution can be measured at an arbitrary location. be able to. Therefore, it is possible to provide an apparatus for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test with improved measurement accuracy and workability.

  According to the invention described in claim 7, the measuring tool is installed in the dark box, and the ultraviolet LED lamp, the infrared LED lamp, the ultraviolet detector, the infrared detector, and the fluorescence luminance detector are the dark box. Since it is provided in the body, it is possible to accurately measure the transmitted light of ultraviolet rays, the fluorescence luminance, and the transmitted light of infrared rays from the test solution in the dark room. Therefore, it is possible to provide an apparatus for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test with improved measurement accuracy.

  According to the eighth aspect of the present invention, a test liquid tank for storing a test liquid formed by mixing at least the fluorescent magnetic powder, the test liquid in the test liquid tank is taken out by the circulation means, and returned to the test liquid tank. A wet fluorescent magnetic particle flaw detection test apparatus comprising: a transfer means that causes the test liquid in the transfer means to contact the magnetized metal surface of the object to be inspected to detect a flaw on the surface. The transfer means includes the component concentration measuring device according to claim 6, wherein the transfer means is a test pipe for pumping the test liquid to the flaw detection unit. Since the measuring instrument of the component concentration measuring device is connected to the pipe for the component, the component concentration measuring device is configured integrally with the wet fluorescent magnetic particle flaw detection test device, and the inspection liquid is sampled as in the conventional method, which is different from the flaw detection test device. Measure the component concentration at the place There is no required.

  That is, the component concentration of the test liquid being transferred from the test liquid tank to the flaw detection unit can be instantaneously measured online as part of the flaw detection test immediately before spraying with the spraying device. Accordingly, it is possible to provide a wet fluorescent magnetic particle flaw detection test apparatus with improved workability.

It is a perspective view of the component density | concentration measuring apparatus of the test liquid used for a wet fluorescent magnetic particle flaw detection test which shows an example of this invention. It is a top view of a component concentration measuring apparatus. It is a front view of a component concentration measuring apparatus. It is a front schematic diagram of the measurement tool periphery showing the installation position of the light source (ultraviolet LED lamp) with respect to the measurement tool, the ultraviolet detector, and the fluorescence luminance detector. It is a front schematic diagram of the measurement tool periphery which shows the light source (infrared LED lamp) with respect to a measurement tool, and the installation position of an infrared detector. It is a block control diagram of a component concentration measuring device. It is a graph (A test liquid is stirred and fluidized) which shows the light-absorbing density | concentration with respect to the density | concentration of each component (a)-(d) in a test liquid, and fluorescence luminance. It is a graph (test | medical solution stationary state) which shows the ultraviolet sedimentation absorption density with respect to the density | concentration of each component (a)-(d) in a test | inspection liquid. It is the whole schematic diagram which showed an example of the wet fluorescent magnetic particle flaw detection test apparatus. It is an expansion schematic diagram of a flaw detection part. It is the perspective view which showed an example of the component density | concentration measuring apparatus with which a wet fluorescent magnetic particle test apparatus is equipped.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a component concentration measuring device for a test liquid used in a wet fluorescent magnetic particle flaw detection test, showing an example of the present invention, FIG. 2 is a plan view of the component concentration measuring device, and FIG. 3 is a front view of the component concentration measuring device. 4 is a schematic front view of the periphery of the measuring tool showing the installation position of the UV detector and the fluorescence luminance detector, and FIG. 5 is a light source (infrared LED lamp) for the measuring tool. Fig. 6 is a schematic front view of the periphery of the measuring tool showing the installation position of the infrared detector, and Fig. 6 is a block control diagram of the component concentration measuring apparatus.

First, as is well known, the inspection liquid used in the wet fluorescent magnetic particle flaw detection test is a mixture of fluorescent magnetic powder, a dispersant, and, if necessary, a rust inhibitor. The details of these components are described in, for example, the above-mentioned Japanese Patent Application Laid-Open No. 2009-109424, etc. First, as the fluorescent magnetic powder, for example, commercially available magnetic powder (such as iron trioxide particles or pure iron particles) Using a synthetic resin binder such as cellulose acetate-based synthetic resin or vinyl butyral-based synthetic resin, Lumogen Yellow 50790: Product name: BASF or Festa A: Product name: Swada The median diameter of 3 to 70 μm: a volume-based distribution display—hereinafter the same—with a true specific gravity of 2 to 5 g / cm ³ ; hereinafter referred to as “fluorescent magnetic powder”) can be used.

  Moreover, a polyoxyalkylene allyl phenyl ether type nonionic surfactant and an anionic surfactant can be used for a dispersing agent, for example. Furthermore, as a rust preventive agent, sodium nitrite etc. can be used, for example. In addition, fluorescent magnetic powder, a dispersing agent, and a rust preventive agent are not limited to the component mentioned above.

  In the wet fluorescent magnetic particle flaw detection test, the above-described components (fluorescent magnetic powder, dispersant, rust preventive agent) are mixed in respective predetermined amounts set according to the object of the flaw detection test, and the prepared inspection liquid is used. In contact with an object to be inspected, which is a steel part such as an automobile shaft, or a steel material such as a billet, surface scratches on the object to be inspected (fine cracks or pinholes existing on or near the surface of the object to be inspected) This is a well-known technique for flaw detection of a surface flaw by a magnetic powder pattern formed by collecting the magnetic powder dispersed in the inspection liquid.

  Most of the test liquid is prepared in the test liquid tank and applied to the magnetized test object, and then the surplus test liquid is collected and sprayed on the test object again. As described above, when surface treatment is performed on the object to be inspected in the previous process, scales such as iron scrap generated by the surface treatment adhere to the object to be inspected, and the object to be inspected to which this scale is attached is attached. When the test liquid is applied, the scale mixed in the surplus test liquid is collected in the test liquid tank, and therefore the scale that did not exist at the beginning of the flaw detection (initial preparation) is mixed in the test liquid. Along with this, the concentration gradually increases. And since this scale is a ferromagnetic material such as iron oxide, the flaw detection accuracy is greatly reduced because the adhesion of the fluorescent magnetic powder to the flaw portion is hindered during flaw detection.

  In addition, the concentration of the fluorescent magnetic powder in the test solution affects the visibility of flaw detection, and the concentration of the dispersant also affects the wettability of the test solution to the object to be inspected. It is. In a wet fluorescent magnetic particle flaw detection test apparatus, which will be described later, performed using such a test liquid, the test liquid taken out from the test liquid tank with a pump and brought into contact with the object to be inspected and subjected to the flaw detection test is returned to the test liquid tank. After that, since the component concentration of the inspection liquid fluctuates every moment because it is used again for the flaw detection test, the flaw detection performance is improved and a highly accurate flaw detection test is performed on the inspected object. The concentration of each component in the test solution can be measured simultaneously and instantaneously, and it is necessary to grasp and manage these concentrations.

  Therefore, the inventors of the present application have made it possible to instantaneously and simultaneously measure the concentration of each component (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) contained in the test liquid by using an optical technique. A method and apparatus for measuring the component concentration of the test liquid used in the fluorescent magnetic particle flaw detection test have been developed.

  First, as the component concentration measuring apparatus 1 for the test liquid, for example, as shown in FIGS. 1 to 3, the dark box 2, the measuring tool 3 installed in the dark box 2, and the dark box 2 are attached. The light sources 4a and 4b and the detectors 5, 6 and 7 are included. In the following description, the component concentration measuring apparatus 1 will be described as a measuring apparatus unit that can measure the component concentration of the test liquid sampled from the test liquid tank 22 to be described later, with the installation location being free.

  The dark box body 2 is, for example, a box material having a substantially trapezoidal shape (not limited) when viewed from the front and made of a synthetic resin such as plastic or a metal such as aluminum. . Further, on a straight line connecting the vicinity of the center of the front surface and the back surface in the dark box body 2, a circular hole portion h (not limited to a shape corresponding to the outer shape of the measuring tool 3 described later) is provided. Further, the left and right shoulders of the top surface of the dark box body 2 are formed with inclined portions 8 in which the outer end portions of one or both of the left and right sides (both in the illustrated example) are inclined downward. The dark box body 2 may be provided with a gripping portion 16 as shown in FIG.

  Next, as shown in FIG. 2, the measuring tool 3 can be inserted into the hole h of the dark box body 2 described above, and has a length substantially equal to the front-rear direction of the dark box body 2 and has a transparent side portion. It has a shape (not limited), and the material thereof is made of a fluororesin that can reduce the friction coefficient of the inner surface of the measuring tool 3. In addition, the diameter of a cylindrical part shall be about 6 mm (it is not limited), for example. The material of the measuring tool 3 is preferably the above-described fluororesin, but any material that can reduce the friction coefficient of the inner surface of the measuring tool 3 can be used as appropriate.

  In addition, the measuring tool 3 has, for example, a lid 10 provided with a flange 9 that is detachable from the main body by a spiral groove (not shown) at the base end, and the distal end of the lid 10 and the measuring tool 3. By attaching or coloring a light shielding plate to the portion 11, when the measuring tool 3 is installed in a hole h of the dark box body 2, the light is shielded from entering the dark box body 2 from the surroundings. Yes.

  Further, for example, a drive motor 16 installed in a case 16 a as a stirring means of the measuring tool 3 is attached to the back side of the dark box body 2 (the front end side of the measuring tool 3 attached). In this case, a recess 18 that can be fitted to the motor shaft 17 is attached to the tip of the measuring tool 3. When the measuring tool 3 is mounted on the dark box body 2, the recess 18 is fitted to the motor shaft 17. The measuring tool 3 is rotated about the front-rear direction of the dark box body 2 through the motor shaft 17 by the rotational drive of the drive motor 16.

  Next, an ultraviolet LED (Light Emitting Diode) lamp 12 (see FIG. 1) as a light source 4a is provided at an appropriate interval in front and rear positions of the left and right side surfaces (the left side surface shown in FIG. 1). An infrared LED lamp 13 (right side in the example) as a light source 4b is attached with the inside darkroom of the dark box 2 as the irradiation direction. The installation positions of the ultraviolet LED lamp 12 and the infrared LED lamp 13 (left and right positions on the side surface of the dark box 2) are not limited to those described above, and may be installed at opposite left and right positions.

  Further, the measuring tool 3 is mounted on the dark box body 2 at the end (left side in the figure) of the other left and right inner side surfaces (the right side surface shown in the back in FIG. 1) of the dark box body 2. The ultraviolet detector 5 is installed at a position facing the mounting position of the ultraviolet LED lamp 12. In the ultraviolet detector 5, the transmittance of the ultraviolet rays irradiated from the ultraviolet LED lamp 12 and obtained by passing through the test solution in the measuring tool 3 is detected. Since the ultraviolet detector 5 is a well-known technique, a detailed description thereof is omitted.

  Further, for example, the inner surface of the dark box body 2 on the obliquely upper side of the ultraviolet LED lamp 12 in the inclined portion 8 on the side where the ultraviolet LED lamp 12 is installed (inclined on the upper left side shown in FIG. 1) A detector 6 is attached. In this fluorescence luminance detector 6, ultraviolet light is irradiated onto the test solution in the measuring tool 3, and visible light (visible light that has been excited and emitted) obtained from the test solution is detected as fluorescence luminance. Since the fluorescence luminance detector 6 is also a well-known technique, detailed description thereof is omitted.

  Moreover, it is an edge part (right side in the figure example) of the other left and right inner side surfaces in the dark box body 2 (right side surface shown in FIG. 1), and sandwiches the measuring tool 3 mounted on the dark box body 2. The infrared detector 7 is installed at a position facing the mounting position of the infrared LED lamp 13. In this infrared detector 7, the infrared ray transmittance obtained by irradiating from the infrared LED lamp 13 and passing through the test solution in the measuring tool 3 is detected. Since the infrared detector 7 is a well-known technique, detailed description thereof is omitted.

  As shown in FIG. 4, the installation positions of these detectors 5, 6, and 7 with respect to the light sources 4 a and 4 b and the measurement tool 3 are as follows. 12, but at an appropriate angle range from the extended line in the ultraviolet irradiation direction of the ultraviolet LED lamp 12 (incident direction into the test solution in the measuring tool 3), preferably on the extended line. It is installed on the inner surface of the dark box body 2 in FIG.

  Further, the fluorescence luminance detector 6 is around the measuring tool 3 on the ultraviolet LED lamp 12 side, and is on the positive side from the front center position c of the measuring tool 3 with respect to the irradiation direction of the irradiation light by the ultraviolet LED lamp 12. (Upper side) Within the range of 90 degrees, for example, 40 degrees to 50 degrees, preferably 50 degrees, preferably installed on the inner surface of the inclined portion 8 in the dark box 2. Note that the fluorescence intensity detector 6 is one of the appropriate angles based on experimental data as a position where the fluorescence intensity values of a wide range of concentrations of fluorescent magnetic powder can be measured more accurately.

  As shown in FIG. 5, the infrared detector 7 is installed at a position facing the infrared LED lamp 13 via the measuring tool 3, and the infrared irradiation direction of the infrared LED lamp 13 (inspection in the measuring tool 3). It is installed in an appropriate angle range from the extension line of the incident direction into the liquid), preferably on the inner side surface of the dark box 2 on the extension line.

  Further, as shown in FIG. 6, these detectors 5, 6, and 7 are connected to the information processing unit 14 in the controller C installed in the dark box 2, and the information processing unit 14 includes Calculation formulas including various data obtained from the graphs shown in FIGS.

  For example, the controller C includes a display unit 15 as a display panel such as a liquid crystal display, which is provided on the surface of the inclined portion 8 of the dark box 2 and displays the fluorescent magnetic powder concentration and the dispersant concentration (such as digital display). Connect. In addition to the dark box 2, the display unit 15 may be installed in a display device separate from the dark box 2 or in a wet fluorescent magnetic particle testing apparatus 21 described later.

  When the test liquid is irradiated with ultraviolet light, among the components contained in the test liquid, the fluorescent magnetic powder irradiated with ultraviolet light emits light when the fluorescent material such as the fluorescent pigment is excited. The luminance (illuminance) can be detected by the fluorescent luminance detector 6 described above. This fluorescence brightness varies depending on the concentration of the fluorescent magnetic powder in the test solution.

Further, when the test solution is irradiated with ultraviolet rays and infrared rays, the ultraviolet rays and infrared rays incident on the test solution pass through the test solution containing each component, and are transmitted from the direction opposite to the incident direction and emitted outside the solution. At this time, the energy of light is transmitted by transmission or reflection, and the transmission of light is usually expressed as an absorbance concentration as in the following equation 1.
Absorbance density = -LOG ₁₀ (Radiation flux / incident flux) ... [Formula 1]

  This absorbance concentration varies depending on each component (fluorescent magnetic powder, dispersant, rust inhibitor, scale, etc.) contained in the test solution, and also varies depending on the concentration of each component. Furthermore, even in a stationary state where the test liquid is not stirred (flowed), the difference depends on the difference in sedimentation characteristics with the passage of time of each component.

  Therefore, using the above-described component concentration measuring device 1 or the like, the test solutions prepared as shown in Table 1 below are irradiated with electromagnetic waves (ultraviolet rays and infrared rays) having different wavelengths from the light sources 4a and 4b. In addition, an experiment was carried out in which the fluorescence brightness and the light absorption concentration were detected by the detectors 5, 6 and 7 for each component to obtain the characteristics of each component. FIG. 7 is a graph showing the absorbance concentration and fluorescence luminance with respect to the concentrations of the components (a) to (d) in the test solution (the test solution is in a stirred and fluidized state), and FIG. 8 is the components (a) to (a) in the test solution. It is a graph which shows the ultraviolet sedimentation absorption density with respect to the density | concentration of (d) (a test solution is a stationary state).

  In addition, for example, in Group 1, when only fluorescent magnetic powder is added to 2 L of water, the concentration of the magnetic powder is 0 g / L (no addition), 0.3 g / L, 0.5 g / L, 1 The test liquid having five kinds of magnetic powder concentrations was prepared by changing the addition amount of the fluorescent magnetic powder to 0.0 g / L and 2.0 g / L. Similarly, group 2 was a test solution having only a dispersant, group 3 was a test solution having only a rust inhibitor, and group 4 was a test solution having only a scale. In addition, LY-20 (manufactured by Marktec Co., Ltd., Super Magna fluorescent magnetic powder) is used for the fluorescent magnetic powder, EC-600C (manufactured by Marktec Co., Ltd., Eco-Magna Dispersant) is used for the dispersant, and AR is used for the rust preventive agent. Iron oxide powder was used for each of −100K (manufactured by Marktec Co., Ltd., super keep rust inhibitor) and scale.

  First, measurement was performed by loading the sample solution 1 in which the magnetic powder concentration of the test solution group 1 was 0 g / L, for example, which was sampled in the measuring tool 3 from which the lid body 10 was detached in the component concentration measuring apparatus 1, and then attaching the lid body 10 again. The tool 3 is rotatably inserted in the hole 7 of the dark box body 2. At this time, the distal end of the measuring tool 3 is stably supported by fitting the recess 18 into the hole 7 and the motor shaft 17 on the back surface of the dark box body 2, and the base end of the measuring tool 3 is The flange portion 9 of the lid body 10 serves as a stopper for the front plate of the dark box 2, and the measuring tool 3 can be stably mounted on the dark box body 2 without shifting.

  Then, by the power of the drive motor 16, the measuring tool 3 is rotated through the motor shaft 17 and the recess 18 to stir the test solution No 1, and after 3 minutes from the start of stirring, the test stirred in the measuring tool 3. The ultraviolet LED lamp 12 and the infrared LED lamp 13 were turned on to irradiate the solution with ultraviolet rays and infrared rays, and the fluorescence brightness, ultraviolet absorption concentration, and infrared absorption concentration of the test solution were detected by the detectors 5, 6, and 7. Similarly, the graph of Fig.7 (a) shows the result of having detected the fluorescence brightness | luminance of each test solution, the ultraviolet light absorption density | concentration, and the infrared light absorption density | concentration in order (magnetic order) of 0.3-2.0 g / L of magnetic powder density | concentration. It was shown to.

  Similarly, the fluorescence intensity, ultraviolet light absorption concentration, and infrared light absorption of each test solution by the concentration of dispersant in test solution group 2, by the concentration of rust inhibitor in test solution group 3, and by the concentration of scale in test solution group 4 are also shown. The results of detecting the concentration are shown in the graphs of FIGS.

  From these values, each component (fluorescent magnetic powder, dispersant, rust inhibitor and scale) during stirring is between the component concentration and each detected value (fluorescence luminance, ultraviolet light absorption concentration, infrared light absorption concentration). Can be found, and is input to the information processing unit 14 as a correlation coefficient (slope of each straight line) specific to each component. These correlation coefficients will be described in the test liquid measurement described later.

  Next, in the component concentration measuring apparatus 1, the test solutions at the respective concentrations of groups 1 to 4 filled in the measuring tool 3 are agitated by the drive motor 16 in the same manner as described above, and the drive of the drive motor 16 is stopped. When a predetermined time (for example, 2 minutes) elapses, the test solution in a stationary state was irradiated with ultraviolet rays by the ultraviolet LED lamp 12, and the ultraviolet absorption concentration was detected by the ultraviolet detector 5.

  Furthermore, at each concentration of each component (fluorescent magnetic powder, dispersant, rust inhibitor and scale), the value of the ultraviolet light absorption density in the stationary state was subtracted from the value of the ultraviolet light absorption density when stirring the test solution described above. The difference value (ultraviolet sedimentation absorption density) is shown in the graphs of FIGS. In FIGS. 8A to 8D, the difference obtained by subtracting the value of the infrared light absorption density in the stationary state from the value of the infrared light absorption density when stirring the test solution described above in each concentration of the above components. The value of the difference (precipitation fluorescence brightness) obtained by subtracting the fluorescence brightness value in the stationary state from the above value (infrared sedimentation absorption concentration) and the fluorescence brightness value when stirring the test solution is also shown.

  And from these values, each component (fluorescent magnetic powder, dispersant, rust inhibitor and scale) during standing is the respective component concentration and each differential value (ultraviolet sedimentation absorbance concentration, infrared sedimentation absorbance concentration, sedimentation fluorescence) (Corresponding to luminance) having a substantially linear line can be found, and the correlation coefficient (slope of each straight line) is input to the information processing unit 14 as a sedimentation characteristic unique to each component. These correlation coefficients will be described in the test liquid measurement described later.

  The density | concentration of each component contained in a test | inspection liquid can be calculated | required from the formula illustrated below. First, for example, the four component concentrations (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) in the test solution that you want to know are determined as unknowns by using the component concentration measuring device 1 and the like. Assuming that the measured data (fluorescence brightness, ultraviolet light absorption density, infrared light absorption density, ultraviolet precipitation density) of the test solution is α, β, γ, and δ, the correlation coefficient and the measured data are as follows. The original simultaneous linear equation.

[Formula 2]
a × b + b × b + c × c + d × d = α
e × b + f × b + g × c + h × d = β
i x i + j x b + k x c + l x d = γ
m × b + n × b + o × c + p × d = δ
Here, a to d are correlation coefficients of fluorescence luminance in each component, e to h are correlation coefficients of ultraviolet light absorption concentration in each component, i to l are correlation coefficients of infrared light absorption concentration in each component, and m to p are The correlation coefficient of the ultraviolet sedimentation absorption density in each component is shown.

以上のようにした場合、Ａ×Ｃ＝Ｂ・・・[式３]
つまり、Ｃ＝Ａ―¹×Ｂ・・・[式４]
となり、Ｂ（α、β、γ、δ）の値（検査液の実測値）が分かると、知りたい検査液中の４種類の成分濃度（蛍光磁粉、分散剤、防錆剤およびスケール）が判明する。従って、情報処理部１４には、このような計算式ならびに各相関係数が入力される。 And when the above equation [2] is expressed as a determinant,

In the above case, A × C = B (Equation 3)
That is, C = A− ¹ × B (Equation 4)
When the values of B (α, β, γ, δ) (measured values of the test solution) are known, the concentration of the four components (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) in the test solution to be known Prove. Therefore, such a calculation formula and each correlation coefficient are input to the information processing unit 14.

  In the above example, the ultraviolet sedimentation absorbance is used, but infrared sedimentation absorbance and fluorescence sedimentation luminance may be used instead of the ultraviolet sedimentation absorbance. Moreover, although the example of the calculation formula which calculates the component in the test | inspection liquid to measure as 4 types (fluorescent magnetic powder, a dispersing agent, a rust preventive agent, and a scale) was shown, if these components to measure become 5 types or 6 types, In addition to ultraviolet sedimentation absorption density, detection data of infrared sedimentation absorption density and fluorescence sedimentation luminance can be used to calculate with a five-way simultaneous linear equation or a six-way simultaneous linear equation.

  Here, for example, when it is desired to measure the component concentration of the inspection liquid in the inspection liquid tank 22 in the wet fluorescent magnetic particle flaw detection test apparatus 21 described later, first, the inspection liquid sampled in the measuring tool 3 with the lid 10 removed. , And the measurement tool 3 with the lid 10 attached again is rotatably inserted in the hole h of the dark box body 2.

  When the measurement start switch is turned on, the controller C operates the drive motor 16 and rotates the measuring tool 3 via the motor shaft 17 and the recess 18 to thereby supply the test solution in the measuring tool 3. Stir. Then, the controller C turns on the ultraviolet LED lamp 12 and the infrared LED lamp 13 and irradiates the test liquid with ultraviolet rays and infrared rays after a predetermined time (for example, 3 minutes) from the start of rotation of the measuring tool 3.

  Next, ultraviolet light and infrared light, which are transmitted light that has passed through a homogeneous test solution during stirring, are detected as an ultraviolet light absorption density and an infrared light absorption density by the ultraviolet light detector 5 and the infrared light detector 7, respectively, and the detection result is an information processing unit. 14, visible light emitted from the test solution and excited and emitted is detected as fluorescence luminance by the fluorescence luminance detector 6, and the detection result is transmitted to the information processing unit 14.

  Next, after a predetermined time (for example, 3 minutes) from the start of rotation of the measuring tool 3 and after the detection of the ultraviolet light absorption concentration, the infrared light absorption concentration, and the fluorescence luminance in the test solution, the controller C detects the drive motor 16. The rotation is stopped, and further, after a predetermined time (for example, 2 minutes) from the rotation stop of the drive motor 16, the ultraviolet LED lamp 12 (or the infrared LED lamp 13 may be used) is turned on to emit ultraviolet light (or / and The test solution is irradiated with infrared rays (which may be infrared rays).

  Next, ultraviolet light, which is transmitted light that has passed through the stationary test solution, is detected as an ultraviolet light absorption concentration by the ultraviolet light detector 5, and the detection result is transmitted to the information processing unit 14. In this case, the measurement of the test solution may be an infrared absorption density or a fluorescence luminance instead of the above-described ultraviolet absorption density.

  And in the information processing part 14, while calculating the difference of the ultraviolet light absorption density | concentration measured from the test | inspection liquid under stirring and the ultraviolet light absorption density | concentration measured from the test | inspection liquid still standing as a ultraviolet sedimentation absorption density | concentration, Using the measured values of fluorescence brightness, ultraviolet light absorption density, and infrared light absorption density in the liquid, the concentration of each component in the test liquid (fluorescent magnetic powder, dispersant, rust preventive and scale) from the determinant such as [Formula 4] described above ) Is calculated.

このように、[式４]のＡに当たる各ファクターには、図７〜８に示した各グラフの傾き値が予め入力されているため、上述したような検査液の各実測値が、上式に入力されることで、行列式により検査液中の各成分（蛍光磁粉、分散剤、防錆剤およびスケール）の濃度を算出することができる。このように、各成分濃度を異にする様々な種類の検査液および、経時変化に伴い変動する検査液に対応して、各成分濃度を正確かつ瞬時に算出させることができるのである。なお、実測値に基づく実際の各成分濃度の記載は省略する。 Hereinafter, calculation examples (formulas) of the concentration of each component of the test solution using the determinant are shown.

As described above, since the slope values of the respective graphs shown in FIGS. 7 to 8 are input in advance to each factor corresponding to A in [Expression 4], the respective measured values of the test liquid as described above are expressed by the above formula. The concentration of each component (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) in the test solution can be calculated from the determinant. In this way, the concentration of each component can be calculated accurately and instantaneously in response to various types of test solutions having different component concentrations and test solutions that vary with time. In addition, description of each actual component density | concentration based on a measured value is abbreviate | omitted.

  Further, UV in the formula represents ultraviolet (ultraviolet), and IR represents infrared (infrared). In addition, logarithmically processed values are used for the measured fluorescence luminance, ultraviolet absorption density, infrared absorption density, and ultraviolet sedimentation absorption density in the test solution being stirred.

  In this way, the concentration of each component (fluorescent magnetic powder, dispersant, rust inhibitor and scale) contained in the test solution is calculated, and the controller C causes the display unit 15 to display the calculation results. Accordingly, the concentration of each component of the test liquid can be measured automatically and simultaneously in a short time of only a few minutes during the period from the start of stirring of the test liquid to the display unit 15 displaying the concentration of each component.

  With the configuration as described above, the transmitted test light obtained by introducing the stirred test solution into the transparent measurement tool 3 and irradiating the test solution with light from the light sources 4a and 4b from one side of the measurement tool 3 and The concentration of each component of the test solution is measured based on the detection values of the detectors 5 and 7 that detect the transmitted light and the detector 6 that detects the visible light that is excited and emitted using the visible light that is excited and emitted. In addition, since the concentration of each component of the test solution is measured from the change in the detection value of each detector obtained by the difference in the sedimentation characteristics of each component over time, inspection can be performed with a simple configuration using an optical method. The concentration of each component contained in the liquid can be easily measured instantaneously with high accuracy.

  In particular, when flaw detection is performed on the object to be inspected, it is mixed in the concentration of scale mixed in the test solution that inhibits the attachment of fluorescent magnetic powder to the scratched part and significantly reduces the flaw detection accuracy, and other test solutions. It is possible to easily measure the concentration of each component contained in a test solution that could not be measured conventionally, such as a rust inhibitor.

  Further, since the light sources 4a and 4b are the ultraviolet LED lamp 12 and the infrared LED lamp 13, they are necessary for calculating the component concentration from the test solution and each component contained in the test solution using two types of electromagnetic waves having different wavelengths. In addition to obtaining a wide variety of measurement data, the service life of the light source lamp that absorbs and excites the test solution is prolonged, and the cost can be reduced.

  Further, since the detectors 5 and 7 for detecting transmitted light are the ultraviolet detector 5 and the infrared detector 7, the absorption density and sedimentation characteristics of each component contained in the test liquid are determined based on two types of electromagnetic waves having different wavelengths. The concentration of each component in the test solution can be accurately and easily calculated based on these values together with the measured values of the fluorescence luminance.

  Further, since the ultraviolet detector 5 and the infrared detector 7 are installed at positions facing the light sources 4a and 4b with the measuring tool 3 interposed therebetween, they enter the inspection liquid from the ultraviolet LED lamp 12 and the infrared LED lamp 13 and pass through the liquid. It is possible to accurately and stably measure the transmitted light of ultraviolet rays and infrared rays that have been transmitted substantially linearly as the absorbance concentration of each component.

  Moreover, since the measuring tool 3 is made of a fluororesin, the adhesion of the fluorescent magnetic powder in the test liquid to the inner surface of the measuring tool having a small friction coefficient is reduced, the frequency of maintenance such as cleaning work in the measuring tool 3 is reduced, and a long period of time. Stable measurement can be performed.

  Further, the measuring tool 3 is installed in the dark box 2, and the ultraviolet LED lamp 12, the infrared LED lamp 13, the ultraviolet detector 5, the infrared detector 7, and the fluorescence luminance detector 6 are the dark box. Therefore, it is possible to accurately measure the ultraviolet light transmitted to the test solution and the fluorescence luminance in the dark room.

  And this component concentration measuring apparatus 1 does not limit an installation place, but can make the component concentration measuring apparatus 1 portable as a measurement unit, and can measure the component density | concentration of the sampled test solution in arbitrary places. In addition, the component concentration measuring apparatus 1 is not limited to the shape as described above.

  Although the said component concentration measuring apparatus 1 was demonstrated as a measuring apparatus unit which can measure the component density | concentration of the test liquid sampled from the inside of a test liquid tank like the example mentioned above, this component concentration measuring apparatus 1 is a wet fluorescent magnetic particle flaw detection test. The concentration of the test solution can be measured by incorporating it into the apparatus as a component concentration measuring apparatus 1 ′.

  Hereinafter, FIG. 9 is an overall schematic diagram showing an example of a wet fluorescent magnetic particle flaw detection test apparatus, FIG. 10 is an enlarged schematic diagram of a flaw detection unit, and FIG. 11 shows an example of a component concentration measuring apparatus provided in the wet fluorescent magnetic particle flaw detection test apparatus. It is a perspective view.

  As shown in FIG. 9, the wet fluorescent magnetic particle flaw detector 21 (for example, trade name: Super Magna, manufactured by Marktec Co., Ltd.) includes a test liquid tank 22 for storing a test liquid, and a test liquid tank 22 The inspection liquid is taken out by a circulating means 23 such as a pump, and the transfer means 24 such as a pipe for returning to the inspection liquid tank 22 and the inspection liquid in the transfer means 24 are applied to the magnetized metal surface of the object to be inspected. It is comprised from the flaw detection part 25 which is made to contact and flaw-detects the surface flaw part.

  As shown in FIG. 10, the flaw detection unit 25 includes a conveyance roller 26a, and conveys the inspection liquid on the conveyor 26b and the inspection liquid taken out from the inspection liquid tank 22 onto the inspection object. A spraying device 27 for spraying (including a circulation device (not shown) that collects the sprayed test solution and returns it to the test solution tank), a through coil 28a, a yoke coil 28b, and the like. From a magnetizing device 28 that magnetizes, and a flaw detection device 29 that performs flaw detection by irradiating an inspection object with an ultraviolet flaw detection lamp 29a (black light) (not shown, but includes an image processing device such as a CCD camera that detects a flaw). Composed.

  The wet fluorescent magnetic particle flaw detection test apparatus 21 is a well-known apparatus (technique) as described above, and a detailed description thereof will be omitted.

  The test liquid component concentration measuring apparatus 1 ′ of the present invention is installed in the middle of the transfer means 24 between the test liquid tank 22 and the flaw detection part 25 in the wet fluorescent magnetic particle flaw detection test apparatus 21.

  The component concentration measuring device 1 'is a single dark box 2 in which the light sources 4a and 4b, the measuring tool 3, the detectors 5, 6, and 7 are installed as illustrated in FIGS. In addition to this, for example, a structure composed of two dark boxes as shown in FIG. 11 may be used.

  In this case, the component concentration measuring apparatus 1 ′ is basically the same as the component concentration measuring apparatus 1, but as shown in FIG. 11, two dark boxes having the same size and shape (not limited). The bodies 2a and 2b are used separately. For example, in one dark box body 2a, the measuring tool 3 'is passed through the hole h, and both end portions of the measuring tool 3' can be connected to the transfer means 24, respectively. . At this time, both end portions of the measuring tool 3 ′ are detachably connected and fixed to the transfer means 24 with fasteners such as bolts and screws (not shown).

  Further, as described above, the dark box body 2a is provided with the ultraviolet LED lamp 12 as the light source 4a and the ultraviolet detector 5 at a position near the center of the left and right inner surfaces and sandwiching the measuring tool 3 '. 4 and within the range of 90 degrees on the positive side (upper side) with respect to the irradiation direction of the irradiation light from the ultraviolet LED lamp 12 from the front center position c of the measuring tool 3 shown in FIG. The fluorescence luminance detector 6 is installed on the inner surface of the inclined portion 8 (in this example, the inclined portion is provided only on the top surface of the dark box body) in the dark box body 2a at -50 degrees, preferably 50 degrees.

  In addition, the other dark box body 2b allows the measuring tool 3 'to pass through the hole h, and allows both ends of the measuring tool 3' to be connected to the transfer means 24, respectively. In addition, an infrared LED lamp 13 as the light source 4b and an infrared detector 7 are installed.

  In addition, since the component concentration measuring apparatus 1 ′ is provided with the light shielding means as described above in the vicinity of the hole h in which the measuring tool 3 ′ is inserted, the wet fluorescent magnetic particle flaw detection test apparatus 21 includes the circulation means 23. Since the test solution is transported through the transfer means 24, it is not necessary to install the stirring means in the dark box 2 described in the component concentration measuring apparatus 1. Moreover, the display part 15 can be provided in appropriate positions, such as the top horizontal part of each dark box 2a, 2b, and the operation panel of the wet fluorescent magnetic particle test equipment 21.

  When the component concentration measuring device 1 ′ composed of such dark boxes 2 a and 2 b is installed in the middle of the transfer means 24 between the test liquid tank 22 and the flaw detection unit 25 in the wet fluorescent magnetic particle flaw detection test device 21 described above. In the illustrated example, the dark box body 2b is installed on the test solution tank 22 side (upstream side) and the dark box body 2a is installed on the flaw detection unit 25 side (downstream side). However, even if the installation order of these dark box bodies 2a and 2b is reversed. In addition, the installation interval can be set as appropriate.

  When the wet fluorescent magnetic particle flaw detection test apparatus 21 performs a flaw detection test on the object to be inspected, the inspection liquid stored in the inspection liquid tank 22 is taken out into the transfer means 24 by the circulation means 23 and is pumped to the flaw detection section 25. However, during this transfer, the inspection liquid in the transfer means 24 first passes through the measuring tool 3 ′ of the dark box body 2 a in the component concentration measuring apparatus 1 ′, and further passes through the transfer means 24 to the dark box body 2 b. After passing through the measuring tool 3 ′, the flaw detection unit 25 is reached from the transfer means 24.

  Then, when measuring the component concentration in the test solution, as in the measurement with the component concentration measuring device 1 described above, in this case, in the wet fluorescent magnetic particle testing device 21, the circulation of the test solution by the circulating means 23 is started. After a predetermined time (for example, 3 minutes), in each dark box 2a, 2b, the test solution passing through the measuring instrument 3 '(agitated state by circulation) is irradiated with ultraviolet rays and infrared rays from the light sources 4a, 4b, Each measurement value (ultraviolet ray absorption density, infrared ray absorption density, and fluorescence luminance) is obtained by the detectors 5, 6, and 7 in the same manner as described above.

  Next, after a predetermined time (for example, 3 minutes) from the start of circulation and after the detection of each measurement value, the driving of the circulation means 23 is stopped, and further, a predetermined time (for example, 2 minutes) from the stop of the circulation means 23 is stopped. ) After that, in each dark box 2a, 2b, the test solution standing in the measuring instrument 3 'is irradiated with ultraviolet rays and infrared rays from the light sources 4a, 4b, and the detectors 5, 6, 7 perform predetermined measurement. After obtaining the value, each component (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) in the test solution is calculated in the information processing unit 14 in the same manner as described above by the calculation method described above, and displayed on the display unit 15 or the like. The

  In addition, by setting the upper limit value and the lower limit value of each component concentration of the test solution in advance in the controller C, for example, when the scale concentration reaches the set value, the display unit 15 or an alarm device (not shown) or the like. Appropriate processing, such as replacement of the test solution, is performed by drawing attention to the surroundings.

  In addition, after detecting each measured value of the test liquid during the above-described standing, driving of the circulation means 23 is started, and in the wet fluorescent magnetic particle flaw detection test apparatus 21, circulation of the test liquid is started by the circulation means 23, The test liquid measurement operation described above is repeated.

  With this configuration, the component concentration measuring device 1 ′ is configured integrally with the wet fluorescent magnetic particle flaw detection test device 21, and the concentration of each component in the test solution being transferred from the test solution tank 22 to the flaw detection unit 25 is determined. As a part of the flaw detection test, the measurement can be instantaneously performed online immediately before spraying by the spraying device 27. By improving the flaw detection performance as well as workability, it is possible to contribute to the productivity and quality improvement of the object to be inspected. .

  In addition, although not shown, the component concentration measuring apparatus 1 ′ is installed in the middle of the transfer means, which is provided separately in the test liquid tank 22 and has a circulation means, which is a dedicated pipe for measuring each component concentration in the test liquid. You can also.

  With this configuration, the concentration of each component of the circulating test liquid returned from the test liquid tank 22 to the test liquid tank 22 via the transfer means 24 'such as a measurement pipe is online as part of the flaw detection test. Can be measured instantaneously. In this case, since a dedicated path for measuring the test liquid is provided separately from the path for spraying the test liquid, for example, inconvenience occurs in the spray path, and even if the spraying stops, The concentration of each component can be measured.

  The present invention can be applied to all wet fluorescent magnetic particle flaw detection test devices and test liquid component concentration measurement devices that measure the concentration of each component in the test liquid used in the wet fluorescent magnetic particle flaw detection test.

DESCRIPTION OF SYMBOLS 1,1 'Component density | concentration measuring apparatus 2 Dark box 3, 3' Measuring tool 4a, 4b Light source 5 Ultraviolet detector 6 Fluorescence luminance detector 7 Infrared detector 8 Inclination part 12 Ultraviolet LED lamp 13 Infrared LED lamp 14 Information processing part 21 Wet fluorescent magnetic particle testing equipment 22 Test liquid tank 23 Circulating means 24 Transfer means C Controller c Front center position h Hole

Therefore, as described in Japanese Patent Application No. 2010-107561, the inventors of the present application irradiate the test liquid with ultraviolet light from an ultraviolet LED lamp as a light source, and transmit transmitted light obtained from the test liquid and excited visible light. A method and apparatus have been developed for measuring the concentration of the dispersant and the concentration of the fluorescent magnetic powder contained in the test liquid based on the detection values detected by the ultraviolet detector and the fluorescence luminance detector, respectively.

The light source is an ultraviolet LED lamp or an infrared LED lamp.

The detector for detecting the transmitted light is an ultraviolet detector and an infrared detector.

A second aspect of the present invention is the method for measuring a concentration of a test solution component used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, wherein the ultraviolet detector and the infrared detector sandwich the measuring tool and the light source. It is characterized in that it is installed at the opposite position.

A third aspect of the present invention is the method for measuring a concentration of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to the first aspect, wherein each of the components includes fluorescent magnetic powder, a dispersant, and a scale. Features.

According to a fourth aspect of the present invention, a test liquid obtained by mixing at least fluorescent magnetic powder is brought into contact with a magnetized metal surface of an object to be inspected, and the fluorescent magnetic powder is collected and adhered to a scratch on the metal surface. A component concentration measuring device for the test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection of the scratched part, the component concentration measuring device comprising: a measuring tool for introducing the test solution; and a flow of the test solution A pump to be controlled, an ultraviolet LED lamp as a light source for irradiating the test liquid in the measuring tool with ultraviolet light, an infrared LED lamp as a light source for irradiating the test liquid in the measuring tool with infrared light, and An ultraviolet detector for detecting transmitted light obtained from the test liquid, an infrared detector for detecting transmitted light obtained from the test liquid by the infrared irradiation, and obtained from the test liquid by the ultraviolet irradiation. Fluorescence luminance detector for detecting visible light emitted by excitation, and each detection by the ultraviolet detector, the infrared detector and the fluorescence luminance detector of the test liquid when the pump is operated and stopped And an information processing unit for calculating the concentration of the fluorescent magnetic powder, the concentration of the dispersing agent, the concentration of the rust inhibitor, and the scale concentration contained in the test solution, respectively, based on the values.

Invention of Claim 5 is set to the component density | concentration measuring apparatus of the test solution used for the wet fluorescent magnetic particle flaw detection test of Claim 4 , and while the said measurement tool is installed in a dark box, the said ultraviolet LED lamp, The infrared LED lamp, the ultraviolet detector, the infrared detector, and the fluorescence luminance detector are provided in the dark box.

According to a sixth aspect of the present invention, there is provided a test liquid tank for storing a test liquid formed by mixing at least fluorescent magnetic powder, and the test liquid in the test liquid tank is taken out by a circulation means and is returned to the test liquid tank. A wet-type fluorescent magnetic particle flaw detection tester comprising: a transfer means that causes the test liquid in the transfer means to contact the magnetized metal surface of the object to be inspected to detect a flaw on the surface. The transfer means includes the component concentration measuring device according to claim 4 , wherein the transfer means measures the component concentration of the test liquid, and the transfer means pumps the test liquid to the flaw detection unit. It is piping, Comprising: The said measuring tool of the said component concentration measuring apparatus was connected to this test piping, It is characterized by the above-mentioned.

In addition, since the light source is an ultraviolet LED lamp or an infrared LED lamp, various types of measurements necessary for calculating the component concentration from the test solution and each component contained in the test solution using two types of electromagnetic waves having different wavelengths. In addition to obtaining data, the service life of the light source lamp that absorbs and excites light in the test solution is prolonged, and the cost can be reduced. Accordingly, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test, which enables measurement of each component concentration and improves productivity.

Moreover , since the detectors that detect the transmitted light are ultraviolet detectors and infrared detectors, the absorption concentration and sedimentation characteristics of each component contained in the test solution can be obtained for two types of electromagnetic waves having different wavelengths. The concentration of each component in the test solution can be calculated accurately and easily based on these values together with the measured values of the fluorescence luminance. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test which enables measurement of each component concentration and improves measurement accuracy and workability.

According to the second aspect of the present invention, since the ultraviolet detector and the infrared detector are installed at a position opposite to the light source with the measuring tool sandwiched therebetween, the ultraviolet LED lamp and the infrared LED lamp enter the inspection liquid and enter the liquid. The transmitted light of ultraviolet rays and infrared rays transmitted substantially straight through can be accurately and stably measured as the absorbance concentration of each component. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test with a simple configuration and improved measurement accuracy.

According to the third aspect of the present invention, each component includes fluorescent magnetic powder, a dispersant, and a scale. Therefore, when flaw detection is performed on the object to be inspected, the adhesion of the fluorescent magnetic powder to the flaw is inhibited, and flaw detection is performed. Easily adjust the concentration of each component contained in the test solution, which could not be measured in the past, such as the concentration of scale mixed in the test solution that would significantly reduce the accuracy, and other anti-corrosive agents mixed in the test solution Can be measured. Therefore, it is possible to provide a method for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test which enables measurement of each component concentration and improves measurement accuracy and workability.

According to the fourth aspect of the present invention, the test liquid formed by mixing at least the fluorescent magnetic powder is brought into contact with the magnetized metal surface of the object to be inspected, and the fluorescent magnetic powder is collected and adhered to the scratched portion of the metal surface. Is a component concentration measuring device for a test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection by using a measuring tool for introducing the test solution, a pump for controlling the flow of the test solution, and the like. , An ultraviolet LED lamp as a light source for irradiating the test liquid in the measuring tool with ultraviolet light, an infrared LED lamp as a light source for irradiating the test liquid in the measuring tool with infrared light, and transmitted light obtained from the test liquid by the ultraviolet irradiation UV detector that detects UV light, infrared detector that detects the transmitted light obtained from the test solution by infrared irradiation, and fluorescent light that detects the excited and emitted visible light obtained from the test solution by UV irradiation. Based on the detection values of the detector and the inspection liquid at the time of operation and stoppage of the pump by the ultraviolet detector, the infrared detector and the fluorescence luminance detector, the concentration of the fluorescent magnetic powder contained in the inspection liquid and the dispersant Since the information processing unit for calculating the concentration, the rust inhibitor concentration, and the scale concentration is provided, the concentration of each component contained in the test liquid can be easily measured with high accuracy and instantaneously.

According to the fifth aspect of the present invention, the measuring tool is installed in the dark box, and the ultraviolet LED lamp, the infrared LED lamp, the ultraviolet detector, the infrared detector, and the fluorescence luminance detector are the dark box. Since it is provided in the body, it is possible to accurately measure the transmitted light of ultraviolet rays, the fluorescence luminance, and the transmitted light of infrared rays from the test solution in the dark room. Therefore, it is possible to provide an apparatus for measuring the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test with improved measurement accuracy.

According to the sixth aspect of the present invention, a test liquid tank for storing a test liquid formed by mixing at least the fluorescent magnetic powder, and taking out the test liquid in the test liquid tank by the circulation means and returning to the test liquid tank A wet fluorescent magnetic particle flaw detection test apparatus comprising: a transfer means that causes the test liquid in the transfer means to contact the magnetized metal surface of the object to be inspected to detect a flaw on the surface. The transfer means comprises the component concentration measuring device according to claim 4 , which measures the component concentration of the test liquid, and the transfer means is a test pipe for pumping the test liquid to the flaw detection part. Since the measuring instrument of the component concentration measuring device is connected to the pipe for the component, the component concentration measuring device is configured integrally with the wet fluorescent magnetic particle flaw detection test device, and the inspection liquid is sampled as in the conventional method, which is different from the flaw detection test device. Measure the component concentration at the place There is no required.

Further, UV in the formula represents ultraviolet (ultraviolet), and IR represents infrared (infrared). Incidentally, ultraviolet absorption concentration that put the test liquid in the agitation, the infrared absorption concentration, ultraviolet sedimentation absorption concentration, based on the equation 1 described above, in which the respective measured value logarithmically processed.

Claims (8)

Wet fluorescence for flaw detection by bringing a test liquid made by mixing at least fluorescent magnetic powder into contact with the magnetized metal surface of the object to be inspected, and collecting and adhering the fluorescent magnetic powder to the scratch on the surface. A method for measuring the concentration of a component of the test liquid used in a magnetic particle testing,
The component concentration measurement method includes introducing the stirred test solution into a transparent measurement tool, and exciting the transmitted light obtained by irradiating the test solution with light from a light source from one side of the measurement tool. Using the visible light emitted in this way, the detection value of the detector for detecting the transmitted light and the detection value of the detector for detecting the visible light emitted by excitation and the difference in the sedimentation characteristics of each component with time A method for measuring a component concentration of a test liquid used in a wet fluorescent magnetic particle flaw detection test, wherein the concentration of each component of the test liquid is measured from a change in a detection value of each detector.   The method of measuring a component concentration of a test liquid used in a wet fluorescent magnetic particle flaw detection test according to claim 1, wherein the light source is an ultraviolet LED lamp or an infrared LED lamp.   The method of measuring a component concentration of a test liquid used in a wet fluorescent magnetic particle flaw detection test according to claim 1, wherein the detectors that detect the transmitted light are an ultraviolet detector and an infrared detector.   The component concentration measurement of the test liquid used for the wet fluorescent magnetic particle flaw detection test according to claim 1, wherein the ultraviolet detector and the infrared detector are installed at a position opposite to the light source with the measuring tool interposed therebetween. Method.   The method of claim 1, wherein each of the components includes a fluorescent magnetic powder, a dispersing agent, and a scale. A wet type for flaw detection by bringing a test liquid made by mixing at least fluorescent magnetic powder into contact with the magnetized metal surface of the object to be inspected, and collecting and attaching the fluorescent magnetic powder to the scratched part on the metal surface. An apparatus for measuring a concentration of a component of the test liquid used in a fluorescent magnetic particle flaw detection test,
The component concentration measuring device includes a measuring tool for introducing the test solution;
A pump for controlling the flow of the test solution;
An ultraviolet LED lamp as a light source for irradiating the test solution in the measuring instrument with ultraviolet rays;
An infrared LED lamp as a light source for irradiating the test solution in the measuring instrument with infrared rays;
An ultraviolet detector for detecting transmitted light obtained from the test solution by the ultraviolet irradiation;
An infrared detector for detecting transmitted light obtained from the test solution by the infrared irradiation;
A fluorescence luminance detector that detects visible light emitted from the test solution by the ultraviolet irradiation and excited to emit light;
The concentration of the fluorescent magnetic powder contained in the test liquid, based on the detection values of the test liquid at the time of operation and stop of the pump, based on the detection values by the ultraviolet detector, the infrared detector, and the fluorescence luminance detector, An information processing unit for calculating the concentration of the dispersant, the concentration of the rust inhibitor, and the scale concentration;
An apparatus for measuring a concentration of a component of a test liquid used for a wet fluorescent magnetic particle flaw detection test, comprising:   The measuring instrument is installed in a dark box, and the ultraviolet LED lamp, the infrared LED lamp, the ultraviolet detector, the infrared detector, and the fluorescence luminance detector are provided in the dark box. The apparatus for measuring the concentration of a component of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to claim 6. A test solution tank for storing a test solution formed by mixing at least fluorescent magnetic powder;
A transfer means for taking out the test liquid in the test liquid tank by a circulation means and refluxing the test liquid in the test liquid tank;
A wet fluorescent magnetic particle testing apparatus comprising a flaw detection unit for contacting the surface of a magnetized metal of the object to be inspected with the inspection liquid in the transfer means and performing a flaw detection on the surface flaw,
The transfer means includes the component concentration measurement device according to claim 6, which measures the component concentration of the test solution, and the transfer means is a test pipe that pumps the test solution to the flaw detection unit. The wet fluorescent magnetic particle flaw detection test apparatus, wherein the measuring instrument of the component concentration measuring apparatus is connected to the test pipe.

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