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METHOD AND DEVICE FOR MEASURING VISCOELASTICITY

外国特許コード F180009375
整理番号 (S2016-0904-N0)
掲載日 2018年4月19日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP026585
国際公開番号 WO 2018016652
国際出願日 平成29年7月21日(2017.7.21)
国際公開日 平成30年1月25日(2018.1.25)
優先権データ
  • 特願2016-143260 (2016.7.21) JP
発明の名称 (英語) METHOD AND DEVICE FOR MEASURING VISCOELASTICITY
発明の概要(英語) [Problem] To provide a method and device whereby viscoelasticity of an object can be measured nondestructively and in non-contact fashion in a short time. [Solution] By this method, elastic waves and light are radiated to a subject and the viscoelasticity of an object is measured nondestructively and in non-contact fashion using a shadow change based on a change in the direction of a line normal to the surface of the object. Specifically, the present invention has an elastic wave transmission step for pressurizing or exciting the object by elastic waves and causing a minute displacement of the object surface shape, a photoirradiation step for radiating light to the minutely displaced object surface, an image acquisition step for acquiring a shadow change based on a change in the direction of a line normal to the object surface, and a viscoelasticity estimation step for processing an image of the acquired shadow change and calculating a viscoelasticity. This device is configured from an elastic wave transmitting unit for causing a minute displacement of the object surface shape, a photoirradiation unit for radiating light to the object surface, a camera unit for acquiring a shadow change based on a change in the direction of a line normal to the object surface, and an estimation unit for processing an image of the acquired shadow change and calculating a viscoelasticity.
特許請求の範囲(英語) [claim1]
1. The visco-elastic object and a non-contact method of nondestructively measuring, the elastic wave to the subject is irradiated with light, the surface of the object based on a change in the direction of the normal shadow using a change in the estimated visco-elasticity of a viscoelasticity measurement method.
[claim2]
2. Which is an elastic wave to an object subjected to vibration or the pressure, the surface shape of the object and a minute displacement of the elastic wave to be transmitted, a minute displacement of the irradiation light for irradiating a light to the surface of the object and, based on a change in the normal direction of the surface of the object acquired by the image acquisition step and the change in shading, shadow change acquired from the image of the acquired amount of displacement of the pixel intensity calculated estimation step and the visco-elastic viscoelastic, wherein a viscoelasticity measurement method according to claim 1.
[claim3]
3. Wherein the elastic wave, the resonance frequency of the object to be measured including but not limited to a specific frequency in the sonic or ultrasonic viscoelasticity measurement method according to claim 2 characterized.
[claim4]
4. The viscoelastic estimation step, the non-vibration of the shadow of the object surface using the images, acquired by the image change of the pixel intensity of scattered light from the shade except for the component, the intensity of the scattered light component except for the amount of displacement of a light component that has a single oscillation period with respect to the displacement waveform, the surface of the object determined by the relation between the position of the camera unit and a change in the observation time from a change in the observation region based on the calculated shade characterized in that the viscosity of the viscoelasticity measurement method according to claim 2 or 3.
[claim5]
5. Wherein the elastic wave generating step in the micro-change and the strength of the elastic wave, the micro-vibration of the object surface of at least 2 types of obtaining the shadow image, the viscoelastic estimation step, the type of the object surface of the micro-vibration of the shadow of the 2 image, the shadow change due to the change of an observation time of observation time based on the difference between the calculated visco-elasticity of the viscoelastic measurement method according to claim 4 characterized.
[claim6]
6. Wherein the elastic wave generating step, each of the plurality of ultrasonic wave transmitting module from transmitting an acoustic wave in the same phase and focus, the surface of an object of the measurement target is oscillated at a focal point, or, from each of the plurality of ultrasonic wave transmitting module transmitting an acoustic wave in the same phase and to originate a call in parallel, the surface of an object of the measurement object and the vibration in the surface of any of claims 2-5 viscoelasticity measurement method.
[claim7]
7. Of the measuring target of the emitted light is reflected light reflected by the surface of the object, or, refracted and transmitted through the object of the measurement target by the transmitted light, the surface of the object based on a change in the direction of the normal and shading that results in a change of any of claims 2-6 viscoelasticity measurement method.
[claim8]
8. A visco-elastic object and a non-contact measurement device in a non-destructive, vibration or the pressure of the elastic wave of the object by the displacement of the elastic wave to the surface of an object shape and the transmitting unit, a minute displacement of the object and the light irradiation unit for irradiating a light onto the surface, the surface of the object based on a change in the normal direction of the camera unit and acquire a change in shadow, acquired from the image of the change in the amount of displacement of the shaded pixel intensity to obtain the estimator calculates the viscoelastic, characterized in that a viscoelasticity measurement device.
[claim9]
9. Wherein the elastic wave is transmitted from the transmitting unit of the elastic wave, the object including a specific resonant frequency of the measurement target is not limited to the frequency of the sonic or ultrasonic in according to claim 8 and viscoelasticity measurement device.
[claim10]
10. The estimation unit, the non-vibration of the object surface using a shaded image of, a change in shading of the image of the scattered light from the component except for the pixel intensity, the intensity of the scattered light component except for the amount of displacement of a displacement waveform of a component of a single oscillation period with respect to the, with the object surface to the observation region is determined by the relation between the position of the camera unit based on the observation time from a change in shading and viscoelastic Pmy viscoelasticity measurement apparatus according to claim 8 or 9.
[claim11]
11. Wherein the light irradiation section includes, of the measurement target irradiated with light of the reflected light at the surface of the object, or, the refractive index of the measurement target by the transmitted light which is transmitted through the object and, based on a change in the direction normal to the surface of the object so as to cause a change in shading is arranged according to any one of claims 8-10 and viscoelasticity measurement device.
[claim12]
12. Wherein the elastic wave transmission unit, which comprises a plurality of ultrasonic wave transmitting, each of the ultrasonic wave transmitting module, the sound wave originating from each have the same phase being arranged so as to focus, on the surface of the object of the measurement target, is located at a convergence point, wherein the elastic wave generating unit is disposed, or, each of the ultrasonic wave transmitting module, transmitted from each of the acoustic wave in the same phase are arranged to originate a call in parallel, the surface of an object of the measurement target surface to vibrate in any of the claims 8-11 characterized in that the value of the viscoelastic measurement apparatus.
[claim13]
13. The elastic wave to an object surface in a static state without the addition of the distribution of shades static light is irradiated to the distribution of shades of the static information and the information acquisition step, an object subjected to vibration or the pressure of the elastic wave, the surface shape of the object and a minute displacement of the elastic wave to be transmitted, a minute displacement of the irradiation light for irradiating a light to the surface of the object and, based on the dynamic object normal to the surface of the vibration of the shadow distribution to the distribution of shades dynamic information and the information acquisition step, wherein the distribution of shades the dynamic and static shadow distribution information based on the ratio of information, the time for each cycle of the oscillation of the calculated 1, calculates an angular velocity of vibration of a normal line, and the maximum displacement due to the elastic wave of the object estimate and a maximum displacement estimating step, resulting in a maximum displacement estimate from the maximum stress due to an elastic wave and calculates the estimation step and the visco-elastic viscoelastic, wherein a viscoelasticity measurement method according to claim 1.
[claim14]
14. The elastic wave to the subject is irradiated with light, the surface of the object based on a change in the direction of the normal using a change in shading, a non-contact visco-elasticity of the object and the non-destructive measuring device, a static state of the elastic wave is not added to an object surface irradiated with light by the distribution of shades of the static information to the distribution of shades static information obtaining unit, which is an elastic wave to an object subjected to vibration or pressure, the surface of an object to minutely displace a shape of the elastic wave and the transmitting unit, for emitting light to the surface of the object to be slightly displaced in the light irradiation unit, the vibration of the normal to the surface of the object based on the dynamic information to the distribution of shades and the information acquisition unit to the distribution of shades dynamically, wherein the distribution of shades the dynamic and static shadow distribution information from the ratio of the information, wherein the calculated time period 1 of a vibration, a vibration of a normal line of the calculated, estimated by the elastic wave of the maximum displacement of the object to a maximum displacement estimation unit and, the estimated maximum displacement of the elastic wave and calculates the maximum stress due to a visco-elastic and viscoelasticity estimator, and a viscoelasticity measurement device.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
  • 発明者(英語)
  • AOTO TAKAHITO
  • MUKAIGAWA YASUHIRO
国際特許分類(IPC)
指定国 (WO201816652)
National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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