JP2005164427A - Method and apparatus for measuring softness - Google Patents

Method and apparatus for measuring softness Download PDF

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JP2005164427A
JP2005164427A JP2003404630A JP2003404630A JP2005164427A JP 2005164427 A JP2005164427 A JP 2005164427A JP 2003404630 A JP2003404630 A JP 2003404630A JP 2003404630 A JP2003404630 A JP 2003404630A JP 2005164427 A JP2005164427 A JP 2005164427A
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depression
softness
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JP4247474B2 (en
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Osamu Yokota
理 横田
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Nihon University
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Abstract

<P>PROBLEM TO BE SOLVED: To measure the softness of an object to be measured without contacting, even if the surface shape of the object to be measured does not project. <P>SOLUTION: Fluid is sprayed toward the surface of an object 10 to be measured for depressing the surface of the object to be measured, and the softness of the object to be measured is determined by the surface area S of a depression 11 and a load F, applied to the surface of the object to be measured by the jetted fluid G. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ゼリー、こんにゃく、寒天、豆腐、肉、魚、ゾル・ゲル等の軟体物、テニスボールやゴム材などの弾性体、臓器、器官、眼球などの生体部位など、軟らかい物体若しくは弾性を有する物体の柔らかさを測定する方法及び装置に関する。   The present invention provides soft objects such as jelly, konjac, agar, tofu, meat, fish, sol / gel, etc., elastic bodies such as tennis balls and rubber materials, biological parts such as organs, organs, eyeballs, etc. The present invention relates to a method and an apparatus for measuring the softness of an object.

物体の硬さを測定する従来の方法は、ゴムであれば、押針を所定荷重で押し付け、その侵入深さで判定している。また、一般には、ブリネル硬さ試験などのように圧子を被測定物表面に押し付けることで硬さを測定する方法がある。
また、特許文献１に記載の眼圧を測定する方法では、角膜に流体を吹き付け、角膜が平圧となったとき、つまり角膜の一部が平坦になったときの圧力や平圧となるまでの時間によって当該眼圧を測定している。
特開平０７−１７１１１１号公報 In the conventional method for measuring the hardness of an object, if it is rubber, the push needle is pressed with a predetermined load, and the penetration depth is determined. In general, there is a method of measuring hardness by pressing an indenter against the surface of an object to be measured, such as a Brinell hardness test.
Further, in the method of measuring intraocular pressure described in Patent Document 1, when a fluid is sprayed on the cornea and the cornea becomes flat pressure, that is, until the pressure or flat pressure when a part of the cornea becomes flat is reached. The intraocular pressure is measured according to the time.
Japanese Patent Application Laid-Open No. 07-171111

上記接触式の測定方法では、硬い物を接触させて測定するため、プリンのような軟らかい被測定物を想定すると、当該被測定物が傷ついたり破損の可能性が大きいばかりか、感染防止などの点で衛生面で問題がある。
また、特許文献１の測定方法は、圧平法を採用しているため、流体の噴射圧を少しずつ変更しながら吹き付け、且つ角膜が平圧つまり凸状から平らになるように噴射圧力を制御する必要がある。すなわち、平圧となる一瞬の圧を捉えて測定する必要があり、流体の噴射圧制御などが面倒である。また、眼球のように凸状の表面にだけ適用できるものである。
本発明は、上記のような点に着目したものであり、被測定物の表面形状が凸状でなくても当該被測定物の柔らかさを測定することを課題としている。 In the above contact-type measurement method, measurement is performed by contacting a hard object. Therefore, assuming a soft object to be measured such as pudding, the object to be measured is not only likely to be damaged or damaged, but also to prevent infection. There is a problem in terms of hygiene.
In addition, since the measurement method of Patent Document 1 employs the applanation method, spray is performed while gradually changing the fluid injection pressure, and the injection pressure is controlled so that the cornea is flattened, that is, flat from the convex shape. There is a need to. In other words, it is necessary to measure the instantaneous pressure that becomes a flat pressure, and fluid injection pressure control is troublesome. Further, it can be applied only to a convex surface such as an eyeball.
This invention pays attention to the above points, and makes it a subject to measure the softness of the to-be-measured object even if the surface shape of the to-be-measured object is not convex.

上記課題を解決するために、本発明のうち請求項１は、物体の柔らかさを測定する方法であって、被測定物表面に向けて流体を吹き付けて当該被測定物表面を窪ませ、その窪みの表面積と、上記噴射した流体により上記被測定物表面に負荷される荷重とによって被測定物の柔らかさを判定することを特徴とするものである。
次に、請求項２に記載した発明は、被測定物の表面にノズルを対向配置して当該表面に向けて流体を噴射する流体噴射装置と、上記噴射された流体によって上記表面に形成される窪み形状を非接触で検出する形状探知装置と、上記噴射した流体により上記被測定物表面に負荷される荷重、及び上記窪み形状から求められる上記窪みの表面積から柔らかさの指標となる値を演算する演算部とを備えることを特徴とする柔らかさ測定装置を提供するものである。 In order to solve the above-mentioned problem, Claim 1 of the present invention is a method for measuring the softness of an object, and a fluid is sprayed toward the surface of the object to be measured so that the surface of the object to be measured is recessed. The softness of the object to be measured is determined by the surface area of the depression and the load applied to the surface of the object to be measured by the jetted fluid.
Next, the invention described in claim 2 is formed on the surface by the fluid ejecting apparatus that ejects the fluid toward the surface by disposing the nozzle facing the surface of the object to be measured, and the ejected fluid. Calculates a value that is an index of softness from a shape detection device that detects the shape of the depression in a non-contact manner, a load applied to the surface of the object to be measured by the jetted fluid, and a surface area of the depression that is obtained from the depression shape. A softness measuring device is provided that includes a calculating unit.

次に、請求項３に記載した発明は、請求項２に記載した構成に対し、上記ノズルは、開口が円形形状であり、且つ被測定物に向けて真っ直ぐ流体を噴射し、上記形状探知装置は、被測定物の表面に対しラインビーム状のレーザ光を照射し、その反射光を２次元画像撮像手段で受光することで、上記窪みの断面２次元形状を検出し、上記演算部は、上記窪みを球面の一部に近似して、形状探知装置が検出した断面２次元形状から求められる窪みの深さ及び窪みの直径から当該窪みの表面積を求めることを特徴とするものである。   Next, the invention described in claim 3 is the configuration described in claim 2, wherein the nozzle has a circular opening and injects a fluid straight toward the object to be measured. Detects the cross-sectional two-dimensional shape of the depression by irradiating the surface of the object to be measured with a line beam-shaped laser beam and receiving the reflected light with a two-dimensional image capturing means. The depression is approximated to a part of a spherical surface, and the surface area of the depression is obtained from the depth of the depression and the diameter of the depression obtained from the two-dimensional cross section detected by the shape detection device.

本発明によれば、非接触で測定するので衛生的であり、また、表面に少しだけ窪みが形成できれば測定できるので、被測定物の表面形状に特に限定されない。また、噴射の流体圧を一定にして測定することが可能であるので、噴射圧の調整が容易で噴射圧が安定することから測定精度の向上に繋がる。
また、流体を吹き付けて測定するが、上述のように表面に僅かな深さの窪みが形成できれば良いので、軟らかい物ほど噴射圧を小さいく設定できることから、豆腐のような軟らかい物であっても傷つけたり破損したりすることを抑えることができる。 According to the present invention, since the measurement is performed without contact, the measurement is hygienic, and measurement can be performed if a slight depression can be formed on the surface. Therefore, the surface shape of the object to be measured is not particularly limited. Moreover, since it is possible to measure with the fluid pressure of the injection constant, the adjustment of the injection pressure is easy and the injection pressure is stabilized, leading to improvement in measurement accuracy.
In addition, it is measured by spraying fluid, but it is only necessary to form a dent of a slight depth on the surface as described above, so that the softer one can set the injection pressure smaller, so even a soft object like tofu Injury or damage can be suppressed.

次に、本発明に基づく実施形態を図面を参照しつつ説明する。
まず、本実施形態の柔らかさ測定の原理について、図１に基づき説明する。なお、図１に示す窪み１１では分かりやすくするために深さを大きく図示しているが、実際には僅かな窪み１１が形成出来ればよい。
開口面積Ａのノズル６から空気などの流体を一定の流速Ｖで真っ直ぐ被測定物１０の表面に向けて吹き付け、噴射された流体Ｇが当該被測定物１０に衝突した際の単位時間当たりに被測定物１０に負荷される質量Ｍは、ρ・Ａ・Ｖとなる。ρは流体の密度を示す。 Next, an embodiment based on the present invention will be described with reference to the drawings.
First, the principle of softness measurement according to this embodiment will be described with reference to FIG. In addition, in order to make it easy to understand in the hollow 11 shown in FIG. 1, the depth is illustrated to be large.
A fluid such as air is blown straight from the nozzle 6 having an opening area A toward the surface of the object 10 to be measured at a constant flow velocity V, and the sprayed fluid G hits the object 10 to be measured per unit time. The mass M loaded on the measurement object 10 is ρ · A · V. ρ represents the density of the fluid.

また、ノズル６の開口が円形でその直径をｄとすると、Ａ＝π・ｄ2 ／４となり、被測定物１０が受ける荷重である噴射力Ｆは次の式で表される。
Ｆ＝ＭＶ＝ρ・Ａ・Ｖ2 ＝ρ・π2 ・Ｖ2 ／４ ・・・（１）
一方、上記噴射流体の衝突で被測定物１０に形成された窪み１１は、窪み１１の深さが浅ければ球面の一部と近似できることから、窪み１１の表面積Ｓは幾何学的に次の式で表される。
Ｓ＝π・ｄ１・ｈ・・・（２）
ここで、
ｄ１：窪み１１の直径
ｈ：窪み１１の深さ
ｈ＝（１−（１−ｄ１2 ／Ｄ2 ）-2）Ｄ／２
（但し、窪み１１を含む球体の曲率半径をＤ／２とする。）
である。 Further, when the opening of the nozzle 6 to the diameter and d is circular, A = π · d 2/ 4 , and the injection force F is a load object to be measured 10 is subjected is expressed by the following equation.
F = MV = ρ · A · V 2 = ρ · π 2 · V 2/4 ··· (1)
On the other hand, since the depression 11 formed in the DUT 10 by the collision of the jet fluid can be approximated to a part of a spherical surface if the depth of the depression 11 is shallow, the surface area S of the depression 11 is geometrically as follows. It is expressed by a formula.
S = π · d1 · h (2)
here,
d1: Diameter of the depression 11 h: Depth of the depression 11 h = (1- (1-d1 2 / D 2 ) −2 ) D / 2
(However, the radius of curvature of the sphere including the depression 11 is D / 2.)
It is.

したがって、柔らかさ指標として圧力を採用しＨｂとすると、そのＨｂは、次の式で求めることができる。
Ｈｂ ＝ Ｆ／Ｓ＝（ρ・ｄ2 ・Ｖ2 ）／（４・ｄ１・ｈ） ・・・（３）
この（３）式から分かるように、柔らかさの指標であるＨｂは、噴射力Ｆ、窪み１１の深さｈ及び直径ｄ１が求まれば算出することができる。 Therefore, when pressure is adopted as the softness index and Hb is adopted, the Hb can be obtained by the following equation.
Hb = F / S = (ρ · d 2 · V 2 ) / (4 · d1 · h) (3)
As can be seen from the equation (3), Hb, which is an index of softness, can be calculated if the injection force F, the depth h of the depression 11 and the diameter d1 are obtained.

次に、本発明に基づく柔らかさ測定装置について図面を参照しながら説明する。
図１は、本実施形態に係る装置構成の概要図である。
本実施形態の装置は、流体噴射装置１、形状探知装置２、及び演算部３を備える。
流体噴射装置２は、コンプレッサ４、レギュレータ５、及び噴射ノズル６から構成される。コンプレッサ４は、演算部３から指令によって圧縮空気をレギュレータ５に圧送する。レギュレータ５は、圧縮空気を所定の圧に調整した後、噴出ノズル６から被測定物１０の表面１０ａに向けて真っ直ぐ噴射する。 Next, the softness measuring apparatus based on this invention is demonstrated, referring drawings.
FIG. 1 is a schematic diagram of an apparatus configuration according to the present embodiment.
The apparatus according to the present embodiment includes a fluid ejection device 1, a shape detection device 2, and a calculation unit 3.
The fluid ejection device 2 includes a compressor 4, a regulator 5, and an ejection nozzle 6. The compressor 4 pumps compressed air to the regulator 5 according to a command from the calculation unit 3. The regulator 5 adjusts the compressed air to a predetermined pressure and then injects straightly from the ejection nozzle 6 toward the surface 10 a of the object to be measured 10.

形状探知装置２は、図３に示すように、レーザ光Ｌを投光レンズ２１によって幅広のラインビームＬ１にして、噴射流体で窪んだ被測定物１０の表面に照射し、被測定物１０からの反射光Ｌ２を受光レンズ２２を介して２次元画像撮像装置である２次元ＣＣＤ２３で受光することによって、短時間でつまり一度に、窪み１１の２次元断面形状の撮像を行う。その取得した断面２次元形状の情報は演算部３に出力される。
演算部３では、形状探知装置２から入力した断面２次元形状情報（プロフィール情報）に基づき、当該窪み１１を球面の一部に近似することで、当該窪み１１の直径ｄ１及び深さｈを求める。そして、予め設定してある噴射力Ｆを使用して、下記式に基づき柔らかさの指標Ｈｂを求め、不図示の表示部やデータベースに出力する。
Ｈｂ ＝ Ｆ／Ｓ＝Ｆ／（４・ｄ１・ｈ） ・・・（４） As shown in FIG. 3, the shape detection device 2 converts the laser light L into a wide line beam L <b> 1 by the projection lens 21, and irradiates the surface of the measurement object 10 that is depressed by the jetting fluid. The reflected light L2 is received by the two-dimensional CCD 23, which is a two-dimensional image pickup device, through the light receiving lens 22, so that the two-dimensional cross-sectional shape of the depression 11 is picked up in a short time, that is, at a time. The acquired information of the two-dimensional cross section is output to the calculation unit 3.
The computing unit 3 obtains the diameter d1 and the depth h of the depression 11 by approximating the depression 11 to a part of a spherical surface based on the two-dimensional cross-sectional shape information (profile information) input from the shape detection device 2. . And the softness | index Hb is calculated | required based on a following formula using the preset injection force F, and it outputs to a display part and database which are not shown in figure.
Hb = F / S = F / (4 · d1 · h) (4)

次に、上記柔らかさ測定装置の使用方法の一例について、図２を参照して説明する。
まず、対象とする被測定物１０に表面に僅かさ窪み１１を形成出来るだけの噴射圧となるように、レギュレータ５を調整すると共に、電子天秤を使用して、当該電子天秤に対し目的とする距離だけ離した位置にノズル６を配置して噴射させることで、上記噴射力Ｆを実際に計測し、上記演算部３に当該噴射力Ｆを設定しておく。
なお、上記（１）式からなる理論式で上記噴射力Ｆを演算しても良いが、被測定物１０との対向距離などによって、実際の噴射力Ｆと理論式から求めた理論値とでは所定の誤差があることから、本実施形態では、予め、上述のように噴射力Ｆを求めている。もちろん上記理論式に補正係数を乗算して噴射力Ｆを求める等しても良い。なお、理論値に比べて実際の噴射力Ｆの方が大きな値である。 Next, an example of how to use the softness measuring device will be described with reference to FIG.
First, the regulator 5 is adjusted so that a slight depression 11 can be formed on the surface of the object 10 to be measured, and the electronic balance is used for the electronic balance. The jet force F is actually measured by arranging the nozzle 6 at a position separated by a distance and ejecting the nozzle 6, and the jet force F is set in the calculation unit 3.
The injection force F may be calculated by a theoretical formula consisting of the above formula (1), but the actual injection force F and the theoretical value obtained from the theoretical formula depending on the facing distance from the object to be measured 10 and the like. Since there is a predetermined error, in this embodiment, the injection force F is obtained in advance as described above. Of course, the injection force F may be obtained by multiplying the above theoretical formula by a correction coefficient. Note that the actual injection force F is larger than the theoretical value.

そして、上記所定距離だけ対向させて、被測定物１０の表面とノズル６とを対向させる。
また、位置調整装置７によってライン状のレーザビームＬ１が、ノズル６の軸が対向する被測定物１０の表面位置を通過するように位置調整を行う。
この状態で、演算部３を作動すると、当該演算部３はコンプレッサ４に作動指令を出力する。すると、ノズル６から所定圧の流体を被測定物１０の表面に向けて噴射し当該表面に衝突させて窪み１１を形成する。同期をとって、噴射した流体Ｇで変形した被測定物１０の窪み１１の断面２次元形状が形状探知装置２で計測され、演算部３はその窪み１１の形状の２次元情報から窪み１１の表面積を演算し、上記（４）式に基づき柔らかさの指標Ｈｂを演算する。 Then, the surface of the object to be measured 10 and the nozzle 6 are made to face each other by the predetermined distance.
Further, the position adjustment device 7 performs position adjustment so that the line-shaped laser beam L1 passes through the surface position of the object to be measured 10 with which the axis of the nozzle 6 faces.
When the calculation unit 3 is operated in this state, the calculation unit 3 outputs an operation command to the compressor 4. Then, a fluid having a predetermined pressure is ejected from the nozzle 6 toward the surface of the object to be measured 10 and is caused to collide with the surface to form the recess 11. In synchronization, the two-dimensional cross-sectional shape of the dent 11 of the DUT 10 deformed by the jetted fluid G is measured by the shape detection device 2, and the calculation unit 3 determines the dent 11 from the two-dimensional information of the shape of the dent 11. The surface area is calculated, and the softness index Hb is calculated based on the equation (4).

ここで、上記ノズル６からの噴射は単発（ワンショット）でも良いし、連続して吹き付けても良い。要は、形状探知装置２で窪み１１の形状を検出するときに同一噴射圧で吹き付ければよい。
上記構成の柔らかさ測定装置では、非接触で柔らかさを測定するので、ゼリーなどの食品や眼球などの器官を測定する際に、感染のおそれが無く衛生的且つ安全である。
また、わずかに窪み１１を形成する程度に噴射圧を設定して流体を吹き付けるだけである。したがって、ゼリーなどの軟らかい物質であってもその柔らかさに応じた小さな噴射圧に設定するばよいので、当該物質に疵を付けたり破損したりすることが防止できる。 Here, the injection from the nozzle 6 may be a single shot (one-shot) or may be continuously sprayed. In short, when the shape detection device 2 detects the shape of the recess 11, it may be sprayed with the same injection pressure.
The softness measuring apparatus having the above configuration measures the softness in a non-contact manner. Therefore, when measuring foods such as jelly and organs such as the eyeball, there is no risk of infection and it is hygienic and safe.
Moreover, the spray pressure is set to such an extent that the recess 11 is slightly formed, and the fluid is merely sprayed. Therefore, even a soft substance such as jelly may be set to a small injection pressure corresponding to the softness, and thus it is possible to prevent the substance from being wrinkled or damaged.

また、形状の検出が上記実施形態のように短期で出来る場合には流体の噴射は一回だけでも良い。また、連続して流体を噴射させる場合であっても、噴射させる流体の圧は一定値に固定すれば良いので、安定して流体を噴射させることができて簡易且つ精度良く測定することができる。
さらに、測定物の表面は平面であっても凸面であっても、さらには凹面であっても、若干の凸凹状態であっても構わないので、表面が様々の物質の柔らかさを測定することができる。 Further, when the shape can be detected in a short time as in the above embodiment, the fluid may be ejected only once. Further, even when the fluid is continuously ejected, the fluid pressure to be ejected may be fixed at a constant value, so that the fluid can be ejected stably and can be measured easily and accurately. .
Furthermore, the surface of the object to be measured can be flat, convex, concave, or slightly uneven, so the surface can measure the softness of various substances. Can do.

ここで、上記実施形態では、流体として空気を例示しているが、窒素などの他の気体や、水などの液体であっても良い。対象とする被測定物１０の性質などによって最適な流体を選択すればよい。
また、上記形状探知装置２は、一度に断面２次元形状を検出できる装置で説明したが、窪ませる位置の中心を通る直線に沿って連続して若しくは断続的に断面２次元形状の情報を検出するような形状探知装置２を採用しても良い。この場合には、連続して若しくは計測に合わせて断続的に流体を噴射するように制御すればよい。この場合でも、噴射圧を一定に設定すればよい。 Here, in the said embodiment, although air is illustrated as a fluid, other gases, such as nitrogen, and liquids, such as water, may be sufficient. What is necessary is just to select the optimal fluid by the property of the to-be-measured object 10 made into object.
Moreover, although the said shape detection apparatus 2 demonstrated with the apparatus which can detect a cross-sectional 2D shape at once, it detects the information of a cross-sectional 2D shape continuously or intermittently along the straight line which passes along the center of the position to be depressed. Such a shape detection device 2 may be adopted. In this case, the control may be performed so that the fluid is ejected continuously or intermittently according to the measurement. Even in this case, the injection pressure may be set constant.

また、上記実施形態では、窪み１１の形状を球面の一部に近似して窪み１１の表面積を求めているが、楕円近似などによって窪み１１の表面積を演算しても良い。または、他の方法によって非接触で窪み１１の表面積を演算するようにしても良い。
また、本実施形態では、柔らかさの指標Ｈｂを圧力で示しているがこれに限定されない。例えば、順次送られてくる同一種類の物質を順次測定する場合には、基準となる圧力値との比を柔らかさの指標として、無次元数としても良い。 Moreover, in the said embodiment, although the shape of the hollow 11 is approximated to a part of spherical surface and the surface area of the hollow 11 is calculated | required, you may calculate the surface area of the hollow 11 by ellipse approximation etc. Or you may make it calculate the surface area of the hollow 11 by non-contact by another method.
In the present embodiment, the softness index Hb is indicated by pressure, but the present invention is not limited to this. For example, in the case of sequentially measuring the same kind of substances that are sequentially sent, a ratio with a reference pressure value may be used as a softness index, and a dimensionless number may be used.

本発明の原理を説明する図である。It is a figure explaining the principle of this invention. 本発明に基づく実施形態に係る装置構成を示す概要図である。It is a schematic diagram which shows the apparatus structure which concerns on embodiment based on this invention. 本発明に基づく実施形態に係る形状探知装置２を説明する概要図である。It is a schematic diagram explaining the shape detection apparatus 2 which concerns on embodiment based on this invention.

符号の説明Explanation of symbols

１ 流体噴射装置
２ 形状探知装置
３ 演算部
４ コンプレッサ
５ レギュレータ
６ ノズル
１０ 被測定物
１１ 窪み
Ｈｂ 柔らかさの指標
ｈ 窪みの深さ
ｄ１ 窪みの直径
Ｄ／２ 仮想する球の曲率半径
Ｆ 噴射力 DESCRIPTION OF SYMBOLS 1 Fluid injection apparatus 2 Shape detection apparatus 3 Computation part 4 Compressor 5 Regulator 6 Nozzle 10 Measured object 11 Indentation Hb Softness index h Indentation depth d1 Indentation diameter D / 2 Radius of curvature F of imaginary sphere Injection force

Claims (3)

物体の柔らかさを測定する方法であって、被測定物表面に向けて流体を吹き付けて当該被測定物表面を窪ませ、その窪みの表面積と、上記噴射した流体により上記被測定物表面に負荷される荷重とによって被測定物の柔らかさを判定することを特徴とする柔らかさ測定方法。   A method for measuring the softness of an object, in which a fluid is sprayed toward the surface of the object to be measured so that the surface of the object to be measured is recessed, and the surface of the object and the surface of the object to be measured are loaded by the jetted fluid. A softness measuring method, wherein the softness of an object to be measured is determined based on a load applied. 被測定物の表面にノズルを対向配置して当該表面に向けて流体を噴射する流体噴射装置と、上記噴射された流体によって上記表面に形成される窪み形状を非接触で検出する形状探知装置と、上記噴射した流体により上記被測定物表面に負荷される荷重、及び上記窪み形状から求められる上記窪みの表面積から柔らかさの指標となる値を演算する演算部とを備えることを特徴とする柔らかさ測定装置。   A fluid ejecting device that ejects fluid toward the surface of the object to be measured while facing the nozzle, and a shape detection device that detects a hollow shape formed on the surface by the ejected fluid in a non-contact manner. And a calculation unit that calculates a value serving as an index of softness from a load applied to the surface of the object to be measured by the jetted fluid and a surface area of the depression obtained from the depression shape. Measuring device. 上記ノズルは、開口が円形形状であり、且つ被測定物に向けて真っ直ぐ流体を噴射し、上記形状探知装置は、被測定物の表面に対しラインビーム状のレーザ光を照射し、その反射光を２次元画像撮像手段で受光することで、上記窪みの断面２次元形状を検出し、
上記演算部は、上記窪みを球面の一部に近似して、形状探知装置が検出した断面２次元形状から求められる窪みの深さ及び窪みの直径から当該窪みの表面積を求めることを特徴とする請求項２に記載した柔らかさ測定装置。 The nozzle has a circular opening, and injects a fluid straight toward the object to be measured. The shape detector irradiates the surface of the object to be measured with a line beam of laser light, and the reflected light. Is received by the two-dimensional image capturing means to detect the two-dimensional shape of the cross section of the depression,
The arithmetic unit approximates the depression to a part of a spherical surface, and obtains the surface area of the depression from the depth of the depression and the diameter of the depression obtained from the two-dimensional cross-sectional shape detected by the shape detection device. The softness measuring device according to claim 2.
JP2003404630A 2003-12-03 2003-12-03 Softness measuring method and softness measuring device Expired - Fee Related JP4247474B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007064896A (en) * 2005-09-01 2007-03-15 Hiroshima Univ Noncontact type deformation state detector
JP2008029578A (en) * 2006-07-28 2008-02-14 Kao Corp Skin character evaluation method
JP2019184505A (en) * 2018-04-16 2019-10-24 プリマハム株式会社 Method for evaluating physical property of slice body

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007064896A (en) * 2005-09-01 2007-03-15 Hiroshima Univ Noncontact type deformation state detector
JP2008029578A (en) * 2006-07-28 2008-02-14 Kao Corp Skin character evaluation method
JP2019184505A (en) * 2018-04-16 2019-10-24 プリマハム株式会社 Method for evaluating physical property of slice body
JP7073177B2 (en) 2018-04-16 2022-05-23 プリマハム株式会社 How to evaluate the physical properties of sliced bodies

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