JP2006078502A - Method and apparatus for inspecting oil component on surface using electromagnetic waves - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for inspecting oil components on a surface that can surely and quickly inspect the oil components on the surface, with superior reproducibility. <P>SOLUTION: Electromagnetic waves are radiated from the inside of a probe 1 to the surface 8 of an object to be inspected via a window 14 mounted on a measuring end surface 10 provided on the probe 1, the oil components are computed and detected from the electromagnetic waves that are transmitted or reflected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for inspecting a fat component of a surface portion by irradiating electromagnetic waves. Specifically, it can be used for the electrical measurement of surface properties such as wetting, fat, and color of the products to be inspected or animal and plant secretions. The present invention relates to a method and an apparatus for inspecting oil components on a surface portion using electromagnetic waves, which are suitable for conducting physical property inspections quickly and easily.

  Until relatively recently, surface properties that require sanitary management, such as contamination by foreign matter or oil adhering to the product, were mostly performed by appearance or palpation.

  For example, there is an observation method in which the amount of fats and oils adhering to the material surface of a processed product is visually observed by light irradiation, but there are problems with quantification and rapidity.

  Further, a method for quantitatively measuring the moisture in the epidermis as a change in conductivity or impedance by pressing an electrode on the surface portion has been developed, and is disclosed in Patent Document 1.

  Regarding the measurement of the fat component, there is one in which sebum is attached to a sampling plate such as ground glass, and the fat component is measured by the transmission amount based on the absorption wavelength spectrum in the infrared region.

  Moreover, there is a method of measuring the amount of reflection by moving a measurement probe from which a fat component has been previously collected to an optical processing system of a measurement main body, which is disclosed in Patent Document 2.

Japanese Patent No. 1981624 Japanese Patent No. 2992595

  However, in the conventional method of measuring through inspection of a stain or the like due to an oil or fat component or moisture, an artificial error due to individual differences of the measurer cannot be eliminated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for inspecting a fat component on the surface portion that can quickly and reliably inspect the fat component on the surface portion with good reproducibility.

  In order to achieve the above object, in the method and apparatus for inspecting oil components on the surface portion of the present invention, electromagnetic energy over the electromagnetic field, radio wave, and optical spectrum regions is radiated to the surface portion to be inspected, and the radiation spectrum and The oil and fat component can be inspected based on the amount of change.

  The fat and oil component measuring means includes a radiation source that radiates an electromagnetic wave having an absorption wavelength region in fat toward a surface portion to be inspected, and a receiver (also referred to as a receiver) that measures the amount of transmission or reflection. The fat component and its presence are immediately detected by calculating the measured value.

  In this case, for example, when measuring the amount of reflection, it is configured to measure in a contact state in which a transparent body such as a flat glass attached to the measurement end face is directly pressed against the fat surface, and a transmission body attached to the end face In some cases, the fat surface and the fat surface are measured without being in contact with each other through a gap.

  According to the former configuration, it is possible to measure a state in which fat is diffused while the permeator and the surface portion are brought into close contact with each other with a predetermined pressing force. In the latter configuration, measurement can be performed with the fat surface as it is, the distance between the surface portion and the radiation source can be increased, and the probe or surface portion having the radiation source can be inspected while moving at high speed. There is a feature.

  Moreover, each electromagnetic wave or light spectrum including infrared radiation to ultraviolet radiation can be applied to the wavelength of the electromagnetic wave used for the fat component measuring means.

  In particular, if a small light emitting diode having the maximum light emission intensity in the wavelength band of blue-based visible radiation of 380 to 500 nm is selected and the present invention is carried out, it is useful for miniaturization of the device.

  According to the present invention, since a technique for inspecting oil and fat components on the surface portion using electromagnetic waves has been established, it has become possible to perform detection processing quickly with good reproducibility regardless of the difference in skill of the measurer.

  The wavelength of the electromagnetic wave used for the fat component measuring means can be an electromagnetic wave or light spectrum of various wavelengths including infrared radiation to ultraviolet radiation, but if a light emitting diode is selected and used, the equipment can be downsized. There is an effect that the detection process of the present invention can be easily achieved while saving power.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Regarding several phenomena in which the fat component changes the properties of electromagnetic waves, a method of using it as a measuring means was examined.

  For example, when measuring a transmittance (compared to a pure water film) when irradiating a transparent quartz plate coated with a fat film with an electromagnetic wave of 250 to 800 nm in a public research institution, a wavelength of 380 nm (transmittance 88%) A phenomenon in which the transmittance decreases in the ultraviolet radiation region below was observed. That is, a remarkable change in properties was clarified that it decreased 60% at 270 nm and 20% at 250 nm.

  Therefore, as shown in FIG. 1, a fat component 8a is applied to a part of the surface portion 8 of a planar metal, plastic, living body, or the like, that is, a spot having an area of a predetermined size. An experiment was conducted in which an electromagnetic spectrum in the wavelength region of 4.0 μm was selected and each was irradiated.

  When an electromagnetic wave having a violet-blue wavelength in the range of 380 to 500 nm was irradiated at a predetermined incident angle θ, the tendency to change to dark dark blue according to the fat component was visually confirmed. As a result of an experimental study of the matrix distribution ratio while imaging the phenomenon in which the amount of reflected light from the irradiation point attenuates and changes color using a CCD camera for the receiver 16 (also called a receiver), fat components are recognized. I found that I can do it.

  In this case, a portion where a fat component is not applied or a portion where a reference fat component is attached is set as a dummy 33, and a signal output difference between the reflected light amount and the reflected light amount from the fat component 8a is calculated. Thus, the measured value of the fat component can be calculated stably.

  The radiation source 15 was subjected to an experiment by forming an electromagnetic spectrum by applying a predetermined optical filter to a halogen light source. A method of purchasing a sample called a blue light emitting diode to be used as the radiation source 15 and measuring the attenuation ratio of the reflected light by the light receiving element of the receiver 16 is a useful means for simplifying and downsizing the measuring apparatus.

  FIG. 2 shows a state in which the transmission body 14 provided on the measurement end face 10 of the probe 1 is pressed against the fat component 8a of the surface portion 8 in the first embodiment of the present invention. A form in which fat is diffused while and are closely attached with a predetermined pressing force is shown. Therefore, the measurement is performed in a state in which the electromagnetic wave from the radiation source 15 is irradiated on the fat diffusion unit 35. In the figure, 3 is a spring, 31 is a casing, and 32 is a sleeve.

  The second embodiment shown in FIG. 3 has a structure in which a gap is provided between the surface portion 8 and the surface portion 8 of the transmission body 14 provided on the measurement end face 10, so that it directly pushes against the fat component 8a. This is a method of measuring the surface texture as it is without being applied.

  The electromagnetic wave transmission body 14 may be a transparent body such as transparent glass or quartz, or a cavity as long as it has an emission wavelength in the light region.

  The structure of FIG. 2 and FIG. 3 may be appropriately selected or combined depending on the state of the surface portion such as flat, uneven, striped, hard, plastic or elastic soft. Further, in the case of FIG. 3, measurement is possible even when the distance between the radiation source 15 or the transmission body 14 and the surface portion 8 is large.

  In any case, a dummy serving as a measurement standard for the surface state when electromagnetic waves are radiated is set in the vicinity of the radiation source 15. Then, the reflection amount measured by the fat to be inspected and the reflection amount by the dummy are detected by the light receiving element of the receiver 16, and the signal output difference is calculated to determine the measurement value. Alternatively, a means for recognizing a fat component as described above using an image sensor such as a CCD camera as the receiver 16 may be applied.

  Such measuring means can be applied not only to fat, moisture and other secretions, but also to color measurement of substrate color, paint color, etc. by selecting wavelength and incident angle, radiation intensity, composite light etc. according to the test object It can be done.

  In the fat component measuring means of the present invention, an electromagnetic wave (or light) spectrum including infrared radiation to ultraviolet radiation can be applied as the wavelength of the electromagnetic wave used for the electromagnetic wave transmitting body.

  A halogen lamp is used as a radiation source (light emission source) 15 and is incident at a predetermined incident angle (for example, 45 degrees). An optical filter is installed in front of a receiver (light receiver) 16 and the amount of reflection is measured. The component 8a can be detected satisfactorily.

  Further, when a light emitting diode having the maximum emission intensity in the blue-based visible radiation band of 380 to 500 nm of visible radiation is used as the radiation source (light emission source) 15, a good result can be obtained by selecting an incident angle of about 60 degrees. Experiments have shown that Such a function can easily achieve detection of fat components while reducing the size of the inspection apparatus.

Schematic diagram of measurement end face and surface, showing the principle of the present invention 1 is a schematic diagram of a longitudinal section showing a first embodiment of the present invention. Schematic diagram of a longitudinal section showing a second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Probe 8 ... Surface part 8a ... Fat component 10 ... Measurement end surface 14 ... Transmission body 15 ... Radiation source 16 ... Receiver 33 ... Dummy

Claims (6)

An electromagnetic wave is radiated from the inside of the measurement end face provided on the probe to the surface of the inspection object,
A method for inspecting a fat and oil component on a surface portion using an electromagnetic wave, wherein the fat and oil component is calculated and detected from a measured value of the transmitted or reflected electromagnetic wave by a receiver.   In Claim 1, when measuring the oil and fat component by radiating the electromagnetic wave from the inside of the measurement end face, means for directly pressing and detecting the surface portion having the oil and fat component to be inspected on the transmission surface, In the case of carrying out with any of the measuring means with the means for detecting without contact, a dummy was set as a measurement standard for the surface condition when the electromagnetic wave was radiated, and measured with the oil to be inspected. An electromagnetic wave characterized in that a transmission amount or reflection amount and a transmission amount or reflection amount in the dummy portion are detected by a light receiving element or an image sensor of the receiver, and a signal output difference is calculated to determine a measurement value. Inspection method for oil and fat components on the surface.   3. The electromagnetic wave according to claim 1, wherein an electromagnetic spectrum including a visible radiation region having a maximum emission intensity at a required measurement wavelength in a wavelength range of 380 to 500 nm is selected and used as the radiation source of the electromagnetic wave. Inspection method for oil and fat components on the surface. A probe with a measuring end face;
An electromagnetic wave characterized by comprising an oil and fat component measuring means for radiating an electromagnetic wave from the inside of the measurement end surface to the surface portion to be inspected and calculating and detecting the fat and oil component from the transmitted or reflected electromagnetic wave. Inspection device for oil and fat components on the surface.   5. The oil / fat component measuring means according to claim 4, wherein when measuring the oil / fat component by radiating the electromagnetic wave from the inside of the measurement end face, the surface part having the oil / fat component to be inspected is directly pressed against the surface of the transmission body. In the case of carrying out with any of the measuring means of the means to detect and the means to detect without contacting the surface of the transmission body, a dummy serving as a measurement standard of the surface state when the electromagnetic wave is emitted is set, The amount of transmission or reflection measured by the oil or fat to be inspected and the amount of transmission or reflection at the dummy portion are detected by the light receiving element or image sensor of the receiver, and the signal output difference is calculated to determine the measurement value. An inspection apparatus for oil and fat components on the surface portion using electromagnetic waves.   6. The electromagnetic wave according to claim 4, wherein an electromagnetic spectrum including a visible radiation region having a maximum emission intensity at a required measurement wavelength in a wavelength region of 380 to 500 nm is selected and used as the radiation source of the electromagnetic wave. Inspection device for oil and fat components on the surface.

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