JP5658091B2 - Measuring method and measuring device for concentration of each component in test liquid used for wet fluorescent magnetic particle flaw detection test - Google Patents

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 IIIP82 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. Further, 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 on the object to be inspected again. 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, the inventors of the present application introduced the stirred test liquid into a transparent measuring instrument as described in Japanese Patent Application No. 2010-257667 in order to grasp the concentration of components contained in the test liquid and improve the flaw detection accuracy. An ultraviolet detector that irradiates the test solution in the measuring instrument with an ultraviolet LED lamp and an infrared LED lamp as a light source from one side of the measuring instrument, and detects transmitted light obtained from the test solution by ultraviolet irradiation; Each detection value (inspection) by an infrared detector that detects transmitted light obtained from a test solution by infrared irradiation and a fluorescence luminance detector that detects visible light excited and emitted from the test solution by ultraviolet irradiation Liquid flow state), and from the detection value (test solution stationary state) obtained by each detector obtained by the difference in sedimentation characteristics of each component in the test solution over time, fluorescent magnetic powder contained in the test solution, Developed powder, rust inhibitors, a method and apparatus for measuring the concentration of the scale.

  However, steel materials such as automobile parts, which are test objects, are often subjected to cutting work before the flaw detection test in the manufacturing process, and well-known oil components such as cutting oil and preservatives adhere to the surface of the test object. Then, like the scale described above, these oil components are also collected in the inspection liquid tank together with the inspection liquid. Such an increase in the amount of oil mixed in the test solution promotes the aggregation of the fluorescent magnetic powder in the test solution and significantly reduces the flaw detection accuracy. Here, the cause of the aggregation of the fluorescent magnetic powder by the oil component is the start of dispersion of the fluorescent magnetic powder in the oil component. This oil component causes the fluorescent magnetic powder to solidify in the middle of the dispersion or the oil component is included in the test solution. As a result, the mixing of oil into the test liquid makes the performance of the test liquid unstable.

  Therefore, if the concentration of oil contained in the test solution can be grasped, it is possible to maintain the flaw detection performance by controlling the quality of the test solution (such as the timing of replacement), but conventionally it is included in the test solution. This oil concentration cannot be measured, and as a result, the flaw detection test will continue as it is even if the detection performance of the flaws in the flaw detection test has deteriorated due to the increase in the oil concentration in the test solution. Therefore, there was a problem that the performance of the flaw detection test was lowered.

  Accordingly, an object of the present invention is to make it possible to measure the concentration of oil such as cutting oil and preservative mixed in the inspection liquid, and in addition to this oil concentration, the scale contained in the inspection liquid and the fluorescent magnetic powder constituting the inspection liquid The ability to detect flaws in flaw detection tests that can simultaneously measure the concentration of each component in the test solution, such as dispersants and rust preventives, with a simple method, and that allows the concentration to be measured instantaneously and with high accuracy It is an object of the present invention to provide a method and an apparatus for measuring the component concentration of a test liquid used in a wet fluorescent magnetic particle flaw detection test with improved workability.

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. A component concentration measurement method for the test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection of the scratched part, wherein the component concentration measurement method is different by introducing the stirred test liquid into a measurement tool. As a plurality of wavelengths of light sources, the test solution is irradiated from one side of the measuring tool with ultraviolet LED lamps, one visible light LED lamp or a plurality of visible light LED lamps having different wavelengths, and infrared LED lamps. The transmitted light and the visible light excited and emitted are used to detect the transmitted light, the ultraviolet detector, the visible light detector and the infrared detector, and the excited and emitted visible light is detected. Change in detection value of each detector obtained by difference in detection value with fluorescence luminance detector and sedimentation characteristics of each component of the test solution with time and the light source excluding the ultraviolet LED lamp are different. Each component concentration of the test solution is measured from a difference value of each detection value by the detector corresponding to two light sources of wavelengths.

  The invention described in claim 2 is the method of measuring a concentration of a test liquid used in the wet fluorescent magnetic particle flaw detection test according to claim 1, wherein the ultraviolet detector, the visible light detector, and the infrared detector are the measurement devices. It is characterized by being installed at a position facing the light source with a tool in between.

  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 a fluorescent magnetic powder, a dispersant, a rust inhibitor, and a scale. And an oil component.

  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 for controlling, an ultraviolet LED lamp as a light source for irradiating the test liquid in the measuring tool with ultraviolet light, and a visible light LED lamp or a wavelength of a light source for irradiating the test liquid in the measuring tool as visible light. A plurality of different visible light LED lamps, an infrared LED lamp of a light source for irradiating the test solution in the measuring instrument with infrared light, and an ultraviolet detector for detecting transmitted light obtained from the test solution by the ultraviolet irradiation A visible light detector for detecting the transmitted light obtained from the test liquid by the visible light irradiation; an infrared detector for detecting the transmitted light obtained from the test liquid by the infrared irradiation; and Fluorescence luminance detector for detecting visible and excited light obtained from the test solution, and the ultraviolet detector, the visible light detector, and the infrared detection of the test solution when the pump is operated and stopped And an information processing unit for calculating the concentration of the fluorescent magnetic powder and the concentration of the dispersant, the concentration of the rust inhibitor, the scale concentration, and the oil concentration contained in the test solution, respectively, based on the detection values by the fluorescence luminance detector. And the measuring tool is installed in a dark box, and the ultraviolet LED lamp, the visible LED lamp, the infrared LED lamp, the ultraviolet detector, and the visible detector. A detector, said infrared detector, wherein the fluorescent intensity detector, characterized by comprising the dark box body.

  According to a fifth 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 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 for measuring the component concentration of the test liquid, and the transfer means is a test pipe for pumping the test liquid to the flaw detection unit. Then, the measuring instrument of the component concentration measuring device is connected to the test pipe.

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 magnetized metal surface of the object to be inspected, and the fluorescent magnetic powder is collected and adhered to the scratched surface. Is a method for measuring the concentration of a component of a test liquid used in a wet fluorescent magnetic particle flaw detection test for flaw detection, wherein the component concentration measurement method introduces a stirred test solution into a measuring tool, and a plurality of light sources having different wavelengths. As an ultraviolet LED lamp, one visible light LED lamp or a plurality of visible light LED lamps having different wavelengths, and transmitted light obtained by irradiating the test solution with light from an infrared LED lamp from one side of the measuring tool and Each detection value and detection of an ultraviolet detector, a visible light detector, and an infrared detector that detect transmitted light using visible light excited and emitted, and a fluorescence luminance detector that detects visible light excited and emitted. Changes in the detection value of each detector obtained by the difference in sedimentation characteristics with the passage of time of each component of the test solution and each of the light sources other than the ultraviolet LED lamp by the detectors corresponding to two light sources having different wavelengths Since the concentration of each component of the test solution is measured from the difference value of the detection value, the concentration of each component including contaminants contained in the test solution is instantaneously and highly accurate with a simple configuration using an optical method. It can be measured easily.

  In particular, the test solution contains oil concentrations mixed in the test solution that could not be measured in the past, such as cutting oil and preservatives that promote the aggregation of fluorescent magnetic powder in the test solution and significantly reduce the flaw detection accuracy. Since it can measure with each density | concentration of other components or contaminants (fluorescent magnetic powder, a dispersing agent, a rust preventive agent, a scale) to be detected, flaw detection performance can be maintained by liquid quality management of a test liquid.

  In addition, by using three types of electromagnetic waves with different wavelengths, various types of measurement data necessary for component concentration calculation can be obtained from the test solution and each component contained in the test solution, and an LED lamp can be used. The service life of the light source lamp that absorbs and excites the test solution is prolonged, and the cost can be reduced. 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 invention of Claim 2, since an ultraviolet detector, a visible light detector, and an infrared detector are installed in the position which opposes a light source on both sides of a measuring tool, an ultraviolet LED lamp, a visible light LED lamp, and an infrared LED The ultraviolet light, visible light, and infrared transmitted light that are incident on the test solution from the lamp and pass through the solution in a straight line 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 invention of Claim 3, since each component contains fluorescent magnetic powder, a dispersing agent, a rust preventive agent, a scale, and oil, it promotes aggregation of the fluorescent magnetic powder in a test | inspection liquid, The concentration of oil contained in the test solution, which could not be measured in the past, such as cutting oil and preservatives that significantly reduce the flaw detection accuracy, is the concentration of fluorescent magnetic powder, dispersant, rust preventive, and scale contained in the test solution. Can be measured together. Therefore, it is possible to provide a method for measuring the concentration of each component of the test liquid used in the wet fluorescent magnetic particle flaw detection test, which enables measurement of the concentration of each component including the contaminants and improves the 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 solution in the measuring tool with ultraviolet light, and a single visible light LED lamp as a light source for irradiating the test solution in the measuring tool with visible light, or a plurality of visible light LED lamps having different wavelengths. An infrared LED lamp as a light source for irradiating the test solution in the measuring instrument with infrared light, an ultraviolet detector for detecting transmitted light obtained from the test solution by ultraviolet irradiation, and obtained from the test solution by visible light irradiation. A visible light detector that detects the transmitted light, an infrared detector that detects the transmitted light obtained from the test solution by infrared irradiation, and an excited and emitted visible light obtained from the test solution by ultraviolet irradiation. Fluorescence intensity detector and the test liquid at the time of operation and stop of the pump, each contained in the test liquid based on each detection value by the ultraviolet detector, visible light detector, infrared detector, fluorescence fluorescence detector And an information processing unit for calculating the concentration of the fluorescent magnetic powder, the dispersant concentration, the rust inhibitor concentration, the scale concentration, and the oil concentration, and the measuring tool is installed in the dark box, and the ultraviolet LED lamp and visible light Since the LED lamp, the infrared LED lamp, the ultraviolet ray detector, the visible light detector, the infrared ray detector, and the fluorescence luminance detector are provided in the dark box, each component including contaminants contained in the test liquid is included. The concentration in instantaneous and accurate, can be easily measured.

  In particular, the test solution contains oil concentrations mixed in the test solution that could not be measured in the past, such as cutting oil and preservatives that promote the aggregation of fluorescent magnetic powder in the test solution and significantly reduce the flaw detection accuracy. Since it can measure with each density | concentration of other components or contaminants (fluorescent magnetic powder, a dispersing agent, a rust preventive agent, a scale) to be detected, flaw detection performance can be maintained by liquid quality management of a test liquid. 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.

  In addition, this component concentration measurement device is not limited to the installation location, and can be incorporated into a flaw detection test device, or the component concentration measurement device can be carried as a measurement unit, and the component concentration of the sampled test solution can be measured at any location. can do. 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 fifth aspect of the present invention, the test liquid tank storing the 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 4, wherein the transfer means is a test pipe for pumping the test liquid to the flaw detection unit, and the test pipe In addition, since the measuring tool of the component concentration measuring device is connected, the component concentration measuring device is integrated with the wet fluorescent magnetic particle flaw detection testing device, and the inspection liquid is sampled as in the conventional method at a place different from the flaw detection testing device. Need to measure component concentration No.

  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 the top view of a component concentration measuring apparatus, and the perspective view of a measuring tool. 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 installation position of the light source (visible light LED lamp or infrared LED lamp) with respect to a measurement tool, and a visible light detector or 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 a graph which shows the difference in the transmittance | permeability by the wavelength of light in a rust preventive agent and oil. It is a graph which shows the density | concentration and the light absorbency in each wavelength of the cutting oil as an oil component. It is a block diagram of a component concentration calculation path in a test solution by a controller. It is a graph which shows the relationship between the density | concentration of cutting oil, and the difference of the light absorption density by blue visible light and infrared rays. It is a perspective view of the component density | concentration measuring apparatus of the test solution used for a wet fluorescent magnetic particle flaw detection test which has arrange | positioned the light source in the dial type which shows the other example of this invention. 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.

  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. FIG. 4 is a schematic front view of the periphery of the measuring tool showing the light source (ultraviolet LED lamp) for the measuring tool and the installation position of the ultraviolet detector and the fluorescence luminance detector, and FIG. 5 is a light source (visible light LED lamp or FIG. 6 is a block control diagram of the component concentration measuring device. FIG. 6 is a schematic front view of the periphery of the measuring tool showing the installation position of the infrared LED lamp) and the visible light detector or infrared detector.

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, such an object to be inspected such as a steel material is often subjected to a cutting process before the flaw detection test, and a well-known oil component such as a cutting oil or an antiseptic is attached to the surface of the object to be inspected. Similarly, these oil components are also collected in the inspection liquid tank together with the inspection liquid. Such an increase in the amount of oil mixed in the test solution promotes the aggregation of the fluorescent magnetic powder in the test solution, and significantly reduces the flaw detection accuracy.

  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 can measure the concentration of the oil mixed in the test solution by using an optical technique, and in addition to the oil concentration, the concentration of each component contained in the test solution ( We have developed a measurement method and measuring device for the component concentration of the test liquid used in the wet fluorescent magnetic particle flaw detection test, which enables instantaneous and simultaneous measurement of fluorescent magnetic powder, dispersant, rust inhibitor and scale).

  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. For example, the light source 4a, 4b, 4c, 4d and the detectors 5a, 5b, 5c, 5d, 5e of the light irradiated by these light sources 4a, 4b, 4c, 4d are configured. 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 penetrated into the hole h of the dark box body 2 described above, and has a length substantially equal to the front and rear direction of the dark box body 2, and the side surface portion is transparent (half Any material that can measure light from each light source, such as a transparent material, is used (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, ultraviolet LEDs (Light Emitting Diode) as the light source 4a are provided at the front and rear positions of the left and right side surfaces of the dark box body 2 (the left side surface shown in FIG. 1). For example, a blue visible light LED lamp as the light source 4b, a green visible light LED lamp as the light source 4c, and an infrared LED lamp (right as the light source 4d) as the light source 4d as the light source 4b are included in the dark box 2 The inside darkroom is attached as the irradiation direction. The LED lamps 4a, 4b, 4c, and 4d are not limited to the above-described installation positions (left and right positions on the side surface of the dark box body 2) and the order of installation, and can be appropriately installed such as left and right reverse positions.

  Here, visible light is a wavelength that can be seen by human eyes among electromagnetic waves, and its wavelength range is approximately 380 nm to 750 nm, and in order from the shorter wavelength side, purple (380 nm to 450 nm), blue (450 nm to 450 nm) 495 nm), green (495 nm to 570 nm), yellow (570 nm to 590 nm), orange (590 nm to 620 nm), and red (620 nm to 750 nm). The ultraviolet region is about 380 nm or less, and the infrared region is about 750 nm or more.

  In the test solution component concentration measurement apparatus 1 of the present invention, one or a plurality of visible light LED lamps having different wavelengths are used as a light source for irradiating visible light. In this example, two of the blue visible light LED lamp 4b and the green visible light LED lamp 4c are used. However, these visible light LED lamps are installed in any one of the visible light wavelength ranges (one color). Even if it is a visible light LED lamp, it is good also as any three (three colors) visible light LED lamp which is in a visible light wavelength range and has a different wavelength range, and the number of kinds of oil content of the oil concentration to measure. Can be set as appropriate. In addition, since these LED lamps 4a-4d are well-known techniques, detailed description is abbreviate | omitted.

  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. An ultraviolet detector 5a is installed at a position opposite to the mounting position of the ultraviolet LED lamp 4a. In this ultraviolet detector 5a, the transmittance of the ultraviolet rays irradiated from the ultraviolet LED lamp 4a and obtained by passing through the test solution in the measuring tool 3 is detected. The ultraviolet detector 5a is a well-known technique and will not be described in detail.

  In addition, for example, the inner surface of the dark box body 2 on the obliquely upper side of the ultraviolet LED lamp 4a in the inclined portion 8 on the side where the ultraviolet LED lamp 4a is installed (the upper left inclined surface shown in FIG. 1) is fluorescent. A detector 5b is attached. In this fluorescence luminance detector 5b, 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 this fluorescence luminance detector 5b is also a well-known technique, detailed description thereof is omitted.

  Further, it is a front end portion (in the example shown in FIG. 1, next to the ultraviolet ray detector 5a in parallel, in order) on the other left and right inner side surfaces (the right side surface shown in the back in FIG. 1). Visible light detectors 5c and 5d are installed at respective positions facing the mounting positions of the blue visible light LED lamp 4b and the green visible light LED lamp 4c with the measuring tool 3 in the mounted state. In each of these visible light detectors 5c and 5d, the blue visible light and the green light emitted from each of the blue visible light LED lamp 4b and the green visible light LED lamp 4c and obtained by passing through the test solution in the measuring tool 3 are obtained. Visible light transmission is detected. Since these visible light detectors 5c and 5d are well-known techniques, detailed description thereof is omitted.

  Further, the measuring tool 3 in a state of being attached to the dark box body 2 at the rear end portion (right side in the illustrated example) of the other left and right inner side faces (the right side face shown in the back in FIG. 1) in the dark box body 2. An infrared detector 5e is installed at a position opposite to the mounting position of the sandwiched infrared LED lamp 4d. In this infrared detector 5e, the infrared ray transmittance obtained by irradiating from the infrared LED lamp 4d and passing through the test solution in the measuring instrument 3 is detected. Since the infrared detector 5e is a well-known technique, detailed description thereof is omitted.

  As shown in FIG. 4, the ultraviolet detector 5a is first placed in the ultraviolet LED 5 via the measuring tool 3 as described above, with respect to the installation positions of the ultraviolet detector 5a and the fluorescence luminance detector 5b with respect to the light source 4a and the measuring tool 3. Although it is installed at a position opposite to the lamp 4a, it is within an appropriate angle range from the extension line in the ultraviolet irradiation direction of the ultraviolet LED lamp 4a (incident direction into the test solution in the measuring tool 3), and preferably extended. Installed on the inner surface of the dark box 2 on the line.

  Further, the fluorescence luminance detector 5b is around the measuring tool 3 on the ultraviolet LED lamp 4a side, and is on the positive side with respect to the irradiation direction of the irradiation light from the ultraviolet LED lamp 4a from the front center position c of the measuring tool 3. (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 brightness detector 5b is a position at which the fluorescence brightness values of a wide range of concentrations of fluorescent magnetic powder can be measured more accurately, based on experimental data, 50 degrees is one of the appropriate angles.

  Further, the visible light detectors 5c and 5d are installed at positions opposite to the blue visible light LED lamp 4b and the green visible light LED lamp 4c via the measuring tool 3, as shown in FIG. The blue visible light LED lamp 4b and the green visible light LED lamp 4c are within an appropriate angle range from the extension line in the visible light irradiation direction (incident direction into the test solution in the measuring tool 3), preferably on the extension line. It is installed on the inner surface of the dark box body 2 in FIG.

  In addition, as shown in FIG. 5, the infrared detector 5e is installed at a position opposed to the infrared LED lamp 4d via the measuring tool 3. The infrared irradiation direction of the infrared LED lamp 4d (inside the measuring tool 3) It is installed on the inner surface of the dark box 2 on the extension line, preferably within an appropriate angle range from the extension line of the incident direction into the test solution.

  Further, as shown in FIG. 6, these detectors 5a, 5b, 5c, 5d, and 5e are connected to the information processing unit 14 in the controller C installed in the dark box 2, and the information processing unit In 14, calculation formulas including various data obtained from the graphs of FIGS.

  The controller C displays, for example, a fluorescent magnetic powder concentration, a dispersant concentration, a rust inhibitor concentration, a scale concentration, an oil concentration, etc. (digital display etc.) provided on the inclined portion 8 surface of the dark box body 2. The display unit 15 as a display panel such as a liquid crystal is connected. 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.

When the test solution is irradiated with UV, visible light, and infrared light, the UV, visible light, and infrared light incident on the test solution pass through the test solution containing contaminants and components, and are transmitted from the direction opposite to the incident direction. And emitted outside the liquid. 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 apparatus 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 4d. An experiment was carried out to obtain the characteristics of each component by detecting the fluorescence brightness and the light absorption density with the detectors 5a, 5b and 5e for 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 4a and the infrared LED lamp 4d were turned on to irradiate the solution with ultraviolet rays and infrared rays, and the fluorescence luminance, ultraviolet absorption concentration, and infrared absorption concentration of the test solution were detected by the detectors 5a, 5b, and 5e. 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) has passed, the test solution in a stationary state was irradiated with ultraviolet rays by the ultraviolet LED lamp 4a, and the ultraviolet light absorption concentration was detected by the ultraviolet detector 5a.

  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 value of the difference value (ultraviolet sedimentation absorption concentration) 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 value of the fluorescence brightness in the stationary state from the value of the value (infrared sedimentation absorption density) 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.

  On the other hand, as the type of oil contained in the inspection liquid, cutting oil, preservative, and the like can be mentioned as described above. In this example, description will be made with cutting oil. FIG. 9 is a graph showing the difference in transmittance depending on the wavelength of light in the rust inhibitor and oil, FIG. 10 is a graph showing the relationship between the cutting oil concentration and the light absorption concentration at each wavelength of the cutting oil, and FIG. FIG. 12 is a graph showing the relationship between the concentration of the cutting oil and the difference between the absorption concentrations of blue visible light and infrared rays.

  As shown in FIG. 9, the transmittance of light depending on the wavelengths of the rust inhibitor and the cutting oil is such that the rust inhibitor absorbs ultraviolet rays around 400 nm but transmits visible light. On the other hand, it was found that the cutting oil tends to increase the amount of transmitted light as it approaches the infrared region. In this experiment, a rust inhibitor (AR-100K, manufactured by Marktec Co., Ltd.) and cutting oil (solibble oil, general-purpose product) were each diluted with water to a concentration of 2%. It is measured by Shimadzu Corporation, automatic spectrophotometer UV-2200).

  Since the rust preventive agent absorbs ultraviolet rays, for example, when the cutting oil is located behind the rust preventive agent with respect to the irradiation direction of the ultraviolet rays from the light source, the rust preventive agent absorbs the ultraviolet rays, so that the cutting oil is Accurate absorbance concentration cannot be measured. By the way, the rust inhibitor can pass visible light and infrared rays.

  Here, as shown in FIG. 10, the cutting oils having different concentrations are irradiated with ultraviolet light, visible light, infrared light having different wavelengths, and blue visible light and green visible light having different wavelengths even in visible light from the respective concentrations. Separately, the absorbance at each wavelength was measured. In addition, the cutting oil (solibble oil, general-purpose product) was prepared with each concentration (0% to 4%) diluted with water. Further, in this experiment, the ultraviolet LED lamp 4a, the blue visible light LED lamp 4b, the green visible light LED lamp 4c, and the infrared LED lamp 4d in the component concentration measuring apparatus 1, and the ultraviolet detector 5a for detecting the absorbance density thereof, visible Photodetectors 5c and 5d and infrared detector 5e can be used.

  From the results of FIG. 10, the cutting oil was able to find a correlation having a substantially linear line between the concentration and the absorbance concentration at each wavelength. In addition, the difference value of the absorption density between the wavelengths (for example, the difference value of the absorption density due to blue visible light and the absorption density due to infrared rays) indicates a predetermined value with respect to the predetermined concentration of the cutting oil. I understood. Here, as described above, the ultraviolet light absorption concentration may include a rust preventive agent together with the cutting oil in the test solution, and the presence of this rust preventive agent may not provide an accurate light absorption concentration. is there.

  Therefore, the concentration of the cutting oil does not use the value of the absorption density due to the ultraviolet rays, but for example, the above-described FIG. Can be accurately calculated by the correlation between the concentration at each wavelength and the absorbance concentration. The combination of wavelengths is not limited to the combination of blue visible light and infrared rays described above except for ultraviolet rays.

  As described above, the concentration of the cutting oil can be obtained from the difference value between the light absorption concentrations of two types of light sources having different wavelengths excluding ultraviolet rays. In the component concentration measuring apparatus 1 of the present invention, the concentration of this cutting oil is used as an oil component. At the same time, the concentrations of other components (fluorescent magnetic powder, dispersant, rust inhibitor and scale) in the test solution can be measured simultaneously.

  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４]
つまり、Ｃ＝Ａ―¹×Ｂ・・・[式５]
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。なお、上述の例では、紫外線沈降吸光濃度を使用したが、この紫外線沈降吸光濃度の代わりに、赤外線沈降吸光濃度や蛍光沈降輝度を用いてもよい。 And when the above equation [2] is expressed as a determinant,
[Formula 3]

In the case described above, A × C = B (Equation 4)
That is, C = A− ¹ × B (Equation 5)
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.

  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 4a, the blue visible light LED lamp 4b, the green visible light LED lamp 4c, and the infrared LED lamp 4d after a predetermined time (for example, 3 minutes) from the start of rotation of the measuring tool 3. The test solution is irradiated with ultraviolet rays, blue visible light, green visible light and infrared rays.

  Next, ultraviolet light, blue visible light, green visible light, and infrared light that are transmitted through a homogeneous test solution in agitation are mixed with ultraviolet light absorption density, visible light absorption density (blue), visible light absorption density (green), and infrared light absorption. Concentrations were detected by the ultraviolet detector 5a, visible light detectors 5c and 5d, and infrared detector 5e, respectively, and the detection results were transmitted to the information processing unit 14 and obtained from the test solution. Visible light is detected as fluorescence luminance by the fluorescence luminance detector 5 b, and the detection result is transmitted to the information processing unit 14.

  Next, the controller C is a predetermined time (for example, 3 minutes) after the rotation of the measuring tool 3 is started, and the ultraviolet light absorption density, visible light light absorption density (blue, green), infrared light absorption density and After detecting the fluorescence luminance, the rotation of the drive motor 16 is stopped. Further, after a predetermined time (for example, 2 minutes) from the stop of the rotation of the drive motor 16, the ultraviolet LED lamp 4a (or / and the infrared LED lamp 4d) may be used. The test solution is irradiated with ultraviolet light (or infrared light).

  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 b, 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 value 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 at rest as an ultraviolet sedimentation absorption density, Each component (fluorescent magnetic powder, dispersant, rust inhibitor, and scale) in the test solution is calculated from the determinant such as [Equation 5] using the measured fluorescence luminance, ultraviolet absorption density, and infrared absorption density in the test solution. ) Is calculated.

式中のＵＶは紫外線（ｕｌｔｒａｖｉｏｌｅｔ）、ＩＲは赤外線（ｉｎｆｒａｒｅｄ）を示す。 An example of calculating the concentration of each component of the test solution using the determinant (Formula 6) is shown below.
(Formula 6)

In the formula, UV indicates ultraviolet (ultraviolet) and IR indicates infrared.

  On the other hand, the controller C calculates the concentration and the absorption concentration at each wavelength of the cutting oil in FIG. 10 input in advance to the controller C based on the detection information of the absorption concentration by blue visible light and the absorption concentration by infrared rays. The concentration of the cutting oil is calculated from the difference value between them.

  Therefore, as shown in FIG. 11, the controller C, on the other hand, is based on the detection information from the detectors 5a to 5e, and on the one hand, the absorption density by different light sources (for example, the absorption density by blue visible light irradiation and the infrared irradiation) The concentration of the cutting oil as the oil contained in the test solution is calculated from the difference value of the light absorption concentration). On the other hand, the fluorescent magnetic powder, the dispersant, the anti-proofing agent contained in the test solution are calculated from the above-described quaternary linear equations. The concentration of rusting agent and scale can be calculated simultaneously and instantaneously.

  Next, the concentrations of all the components (fluorescent magnetic powder, dispersant, rust preventive agent, scale, and oil content) including contaminants in the test solution can be simultaneously and instantaneously determined from the formulas exemplified later. Here, with respect to the predetermined concentration of the cutting oil shown in FIG. 10 described above, the difference value of the absorption density between wavelengths (for example, the difference value of the absorption density by blue visible light and the absorption density by infrared rays) is Since the predetermined value is shown, as shown in FIG. 12, the difference value for each concentration has a substantially linear line between the concentration and the difference value in the cutting oil (difference value correlation coefficient). Can be found.

  In addition, although not shown in figure, the difference value of the light absorption density | concentration with respect to each density | concentration of each component (fluorescent magnetic powder, a dispersing agent, a rust preventive agent, and a scale) by the light source of a different wavelength also has a substantially linear line between the density | concentration of each component. Correlation (correlation coefficient) can be found.

  First, for example, the concentration of five components in the test solution that you want to know (fluorescent magnetic powder, dispersant, rust inhibitor, scale, and oil) are set as unknowns. If the measured data (fluorescence luminance, ultraviolet light absorption concentration, infrared light absorption concentration, ultraviolet sedimentation light absorption concentration, visible light light absorption concentration) of the test solution measured in 1 or the like are α, β, γ, δ, η, respectively, The number of relations and the measured data are the following five-way simultaneous linear equations.

[Formula 7]
a x b + b x b + c x c + d x d + e x ho = α
f x i + g x b + h x h + i x d + j x ho = β
k x b + l x b + m x c + n x d + o x ho = γ
p × i + q × b + r × c + s × d + t × e = δ
u x b + v x b + w x c + x x d + y x ho = η

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 Correlation coefficient of ultraviolet sedimentation absorption density in each component, q to t indicate absorption density difference value correlation coefficients obtained from different wavelengths in the concentration of each component.

以上のようにした場合、Ａ×Ｃ＝Ｂ・・・[式９]
つまり、Ｃ＝Ａ―¹×Ｂ・・・[式１０]
となり、Ｂ（α、β、γ、δ、η）の値（検査液の実測値）が分かると、知りたい検査液中の５種類の成分濃度（蛍光磁粉、分散剤、防錆剤、スケールおよび油分）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 [7] is expressed as a determinant,
Formula [8]

In the above case, A × C = B (Equation 9)
That is, C = A− ¹ × B (Equation 10)
When the values of B (α, β, γ, δ, η) (measured values of the test solution) are known, the concentration of the five components in the test solution (fluorescent magnetic powder, dispersant, rust inhibitor, scale) And oil). Therefore, such a calculation formula and each correlation coefficient are input to the information processing unit 14.

  In other words, the information processing unit 14 calculates a difference value between the ultraviolet light absorption concentration measured from the test solution being stirred and the ultraviolet light absorption concentration measured from the test solution being left as a UV sedimentation light absorption concentration. Each component (fluorescent magnetic powder, dispersant) in the test solution is calculated from the determinant such as [Equation 9] using the measured values of the fluorescence luminance, ultraviolet absorption density, blue visible light absorption density, and infrared absorption density in the test liquid. , Antirust agent, scale and oil content).

An example of calculating the concentration of each component of the test solution using the determinant (Formula 11) is shown below.

[Formula 11]

  As described above, since the slope values of the graphs shown in FIGS. 7 to 10 are input in advance to each factor corresponding to A in [Equation 10], each measured value of the test solution as described above is expressed by the above equation. The concentration of each component (fluorescent magnetic powder, dispersant, rust inhibitor, scale, and oil) 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.

  In this way, the concentration of each component (fluorescent magnetic powder, dispersant, rust preventive agent, scale and oil content) containing contaminants in the test solution is calculated, and the controller C displays the calculation results on the display unit 15. Let 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 above-described configuration, the agitated test solution is introduced into the transparent measuring tool 3, and as a plurality of light sources having different wavelengths, an ultraviolet LED lamp 4a, a plurality of visible light LED lamps 4b and 4c having different wavelengths, and an infrared LED. An ultraviolet detector 5a for detecting transmitted light using transmitted light obtained by irradiating the test solution with light from the lamp 4d from one side of the measuring tool 3 and visible light excited and emitted, and a visible light detector 5c, 5d and the infrared detector 5e, and each detection value obtained by the difference in the sedimentation characteristics of each component of the test liquid with the respective detected values and the fluorescence luminance detector 5b for detecting the visible light excited and emitted. The concentration of each component of the test solution is measured from the difference between the detection values of the detectors 5c and 5e corresponding to the two light sources 4b and 4d of the different wavelengths among the change in the detection value of the detector and the light source. Technique The simple structure had a concentration of each component comprising the contaminants contained in the test solution in instantaneous and accurate, can be easily measured.

  In particular, the test solution contains oil concentrations mixed in the test solution that could not be measured in the past, such as cutting oil and preservatives that promote the aggregation of fluorescent magnetic powder in the test solution and significantly reduce the flaw detection accuracy. Since it can measure with each density | concentration of other components or contaminants (fluorescent magnetic powder, a dispersing agent, a rust preventive agent, a scale) to be detected, flaw detection performance can be maintained by liquid quality management of a test liquid.

  Further, since the light sources 4a to 4d use LED lamps, various types of measurement data necessary for calculating the component concentration from the test liquid and each component contained in the test liquid using electromagnetic waves having different wavelengths. In addition, the service life of the light source lamp that absorbs and excites the test solution is prolonged, and the cost can be reduced.

  In addition, the ultraviolet detector 5a, the visible light detectors 5c and 5d, and the infrared detector 5e are installed at positions opposite to the light sources 4a to 4d with the measuring tool 3 interposed therebetween, so that the LED lamps 4a to 4d enter the test solution. In addition, ultraviolet light, visible light (blue, green), and infrared light transmitted through the liquid almost linearly can be accurately and stably measured 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.

  Furthermore, since the measuring tool 3 is installed in the dark box 2, and the light sources 4a to 4d and the detectors 5a to 5e are provided in the dark box 2, ultraviolet rays, visible light to the test solution in the dark room, Infrared transmitted light and fluorescence luminance can be accurately measured.

  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.

  In the above-described example, the measurement of the concentration of the cutting oil is described as the oil mixed in the inspection liquid. However, the type of oil includes a preservative in addition to the cutting oil. Therefore, when a preservative is also mixed in the test solution and the concentration of this preservative is to be measured, it can be measured by the following method. In addition, since the calculation method of antiseptic | preservative density | concentration is similar to cutting oil, it demonstrates easily below.

  As described above, for cutting oil, the concentration of the cutting oil was measured from the difference between the absorption densities of both using blue visible light and infrared rays. For the preservative, for example, green visible light and infrared rays are used (preservative). Blue visible light and infrared light may be used to measure the concentration of green, and green visible light and infrared light may be used to measure the concentration of the cutting oil).

  Similarly to the cutting oil, the preservatives having different concentrations are irradiated with light from the visible LED lamp 4b and the infrared LED lamp 4d, and the absorbance is obtained by the visible light detector 5c and the infrared detector 5e, respectively. Although not shown in the figure, there is a substantially linear correlation between the difference value of the absorbance and the absorbance, and it can be calculated as a correlation coefficient.

  Therefore, in the case of measuring the concentration of the preservative in addition to the cutting oil mixed in the inspection liquid, as described above, the preservative is added to the oil of [Equation 11] (the oil may be used as the cutting oil). Then, as the correlation coefficient of the difference value, the correlation coefficient of the difference value of the absorption density by the green visible light and the infrared ray obtained for each concentration of each component in the test solution is given in advance.

  Then, the controller C has six detection values (fluorescence luminance, UV absorption concentration, IR absorption concentration, UV sedimentation absorption concentration, blue visible light absorption concentration, and green visible light absorption concentration) obtained from the test solution by the component concentration measuring apparatus 1. Based on the original simultaneous linear equation (which may be calculated from only the difference value), the six types of ingredients of fluorescent magnetic powder, dispersant, rust inhibitor, scale, cutting oil and preservative contained in the test solution are simultaneously and instantaneously Can be calculated.

  In the above description, the example in which both cutting oil and preservative are simultaneously measured as the oil mixed in the inspection liquid has been described. However, the difference value of the light absorption concentration and the difference value correlation coefficient with different light source wavelengths are used for cutting. You may measure only with oil or preservatives, and it may replace with the measurement of an oil content, and may measure another content component and a contaminant. And even if it is the same visible light, the number of the components (contaminants) contained in the test | inspection liquid which can measure a density | concentration can be increased by using the other wavelength area | region in visible light.

  In the component concentration measuring apparatus 1, the light source and the detector can be arranged in other ways. FIG. 13 is a perspective view of a test liquid component concentration measuring apparatus used in a wet fluorescent magnetic particle flaw detection test, in which a light source is arranged in a dial type, showing another example of the present invention.

  As shown in FIG. 13, the component concentration measuring apparatus 1 ′ is provided with a dial-type light source 4 at a position near the center of one side of the dark box 2 (the left side shown in the front in FIG. 13). Also good. The rotatable dial panel 19 may have a well-known configuration, and the ultraviolet LED lamp 4a, the blue visible light LED lamp 4b, the green visible light LED lamp 4c, and the infrared LED lamp 4d are directed to the inside dark room of the dark box 2 in the irradiation direction. It is attached around the dial board 19.

  The rotation axis of the dial board 19 is set to the dark box body 2 so that one of the light source lamps 4a to 4d is always positioned in front of the transmitted light detector 5 'with the measuring tool 3 to be described later sandwiched by the rotation of the dial board 19. Install on the side. And the installation order of these light source lamps 4a-4d is not limited. In addition, 4n in the drawing indicates that a plurality of visible light lamps can be installed in addition to the above-described blue and green.

  Further, the dial board 19 provided with the light source 4 sandwiching the measuring tool 3 in the state mounted on the dark box 2, which is the other inner side (right side shown in the back in FIG. 1) of the left and right sides of the dark box 2. A transmitted light detector 5 ′ capable of measuring transmitted light in the entire range from ultraviolet to infrared is installed at a position opposite to the mounting position. Since the transmitted light detector 5 'is a well-known technique, a detailed description thereof is omitted. The installation positions of the fluorescence luminance detector 5b and the drive motor 16 are the same as described above.

  Accordingly, when measuring the concentration of each component in the test liquid in the measuring tool 3, the dial panel 19 is rotated manually or automatically (a motor is separately installed in the case of automatic), and the light source lamps 4a to 4d are sequentially switched to the test liquid. The concentration of each component in the test solution can be measured in the same manner as described above. By using the component concentration measuring apparatus 1 ′ having such a configuration, the number of installed devices can be reduced, and the length of the apparatus can be shortened to make the apparatus compact.

  The component concentration measuring device 1, 1 ′ has been described as a measuring device unit that can measure the component concentration of the test solution sampled from the test solution tank as in the above-described example. The concentration of the test solution can be measured by incorporating it as a component concentration measuring device 1 ″ in the magnetic particle testing device.

  FIG. 14 is an overall schematic view showing an example of a wet fluorescent magnetic particle flaw detection test apparatus, and FIG. 15 is an enlarged schematic view of a flaw detection portion.

  As shown in FIG. 14, the wet fluorescent magnetic particle flaw detection test apparatus 21 (for example, trade name: Super Magna, manufactured by Marktec Corporation) includes a test liquid tank 22 for storing a test liquid, and a test liquid tank 22 in the 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. 15, the flaw detection unit 25 includes a transport roller 26 a, and a transport device 26 that transports the test object on the conveyor 26 b and the test liquid taken out from the test liquid tank 22 on the test target. 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 ″ according to 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 apparatus 1 ″ is provided with the light shielding means as described above in the vicinity of the hole h where the measuring tool 3 ′ is inserted, and the wet fluorescent magnetic particle testing apparatus 21 includes the circulating 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 devices 1 and 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 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 passes through the measuring tool 3 ′ of the dark box 2 of the component concentration measuring apparatus 1 ″ and then reaches the flaw detection part 25 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 the dark box 2, ultraviolet light, visible light (such as blue and green) and the like from the light sources 4 a to 4 d are applied to the test solution passing through the measuring instrument 3 ′ (stirring state by circulation). Irradiated with infrared rays, the respective measurement values (ultraviolet ray absorbance density, blue visible color absorbance density, green visible color absorbance density, infrared absorbance density and fluorescence luminance) are obtained by the detectors 5a to 5e 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 the dark box 2, the test solution standing in the measuring instrument 3 ′ is irradiated with ultraviolet rays, visible light (blue, green, etc.) and infrared rays from the light sources 4 a to 4 d, and the detectors 5 a to 5 e. Then, a predetermined measurement value is obtained, and in the information processing unit 14, each component (fluorescent magnetic powder, dispersant, rust inhibitor, scale and oil) in the test liquid is calculated in the same manner as described above by the calculation method described above and displayed. Displayed in the part 15 and the like.

  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 or oil concentration in the test solution reaches the set value, the display unit Appropriate processing such as replacement of a test solution is performed by drawing attention to the surroundings via an alarm device 15 or an alarm device (not shown).

  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 integrated with the wet fluorescent magnetic particle flaw detection test device 21, and each component concentration in the test solution being transferred from the test solution tank 22 to the flaw detection unit 25. Can be instantaneously measured online as part of the flaw detection test immediately before spraying with the spraying device 27, and improving the flaw detection performance as well as workability can contribute to improving the productivity and quality of the inspected object. it can.

  In addition, although not shown, the component concentration measuring device 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 and 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.

1, 1 ′, 1 ″ Component concentration measuring device 2 Dark box 3, 3 ′ Measuring tool 4a UV LED lamp (light source)
4b Visible LED lamp (blue, light source)
4c Visible LED lamp (green, light source)
4d Infrared LED lamp (light source)
5a Ultraviolet detector 5b Fluorescence luminance detector 5c Visible light detector (blue)
5d Visible light detector (green)
5e Infrared detector 8 Inclination part 14 Information processing part 21 Wet fluorescent magnetic particle flaw detection test equipment 22 Inspection liquid tank 23 Circulation means 24 Transfer means C Controller c Front center position h Hole

Claims (5)

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 component concentration of the test liquid used in the magnetic particle flaw detection test, wherein the component concentration measuring method introduces the stirred test liquid into a measuring tool, and uses an ultraviolet LED lamp, visible light as a plurality of light sources having different wavelengths. One light LED lamp or a plurality of visible light LED lamps having different wavelengths, and the light of an infrared LED lamp, and the transmitted light obtained by irradiating the test solution from one side of the measuring instrument and excited to emit light Each of the detected values and the previous values of an ultraviolet detector, a visible light detector and an infrared detector for detecting the transmitted light using visible light, and a fluorescence luminance detector for detecting the visible light excited and emitted The detection according to two light sources having different wavelengths among the light sources excluding the change in the detection value of each detector obtained by the difference in the sedimentation characteristics of each component of the test solution with time and the ultraviolet LED lamp A component concentration measuring method for 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 difference value of each detection value by a vessel.   2. The wet fluorescent magnetic particle inspection test according to claim 1, wherein the ultraviolet detector, the visible light detector, and the infrared detector are installed at positions opposed to the light source with the measuring tool interposed therebetween. Method for measuring the concentration of components in the test solution.   The said each component contains fluorescent magnetic powder, a dispersing agent, a rust preventive agent, a scale, and an oil component, The component density | concentration measurement of the test solution used for the wet fluorescent magnetic powder flaw detection test of Claim 1 characterized by the above-mentioned. Method. 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;
One visible light LED lamp or a plurality of visible light LED lamps having different wavelengths as a light source for irradiating the test solution in the measuring instrument with visible light; and
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;
A visible light detector for detecting transmitted light obtained from the test solution by the visible light 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 test solution at the time of operation and stop of the pump is contained in the test solution based on the detection values by the ultraviolet detector, the visible light detector, the infrared detector, and the fluorescence luminance detector, respectively. An information processing unit that calculates the concentration of the fluorescent magnetic powder, the dispersant concentration, the rust inhibitor concentration, the scale concentration, and the oil concentration;
And while the said measuring tool is installed in a dark box, the said ultraviolet LED lamp, the said visible light LED lamp, the said infrared LED lamp, the said ultraviolet detector, the said visible light detector, the said infrared detector, The fluorescence luminance detector is a component concentration measuring device for a test liquid used for a wet fluorescent magnetic particle flaw detection test, which is provided in the dark box. 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 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 unit, The wet fluorescent magnetic particle flaw detection test apparatus, wherein the measurement tool of the component concentration measurement apparatus is connected to the test pipe.

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