JP2020081540A - Processing achievement degree determination apparatus, determination system, determination method, and program - Google Patents
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- 238000012545 processing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 67
- 239000003086 colorant Substances 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000001954 sterilising effect Effects 0.000 claims description 43
- 238000004659 sterilization and disinfection Methods 0.000 claims description 43
- 238000005259 measurement Methods 0.000 claims description 41
- 238000002845 discoloration Methods 0.000 abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
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- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- A—HUMAN NECESSITIES
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- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
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- A61L2/28—Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour
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- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
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- H04N1/56—Processing of colour picture signals
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10024—Color image
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
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Abstract
Description
本発明は、所定の処理の達成度の判定技術に関する。 The present invention relates to a technique for determining the degree of achievement of a predetermined process.
容器内の滅菌対象物を、高圧蒸気や過酸化水素等の雰囲気に暴露することで、滅菌対象物を滅菌することが行われている。この際、滅菌対象物に対する滅菌処理の達成度を判定するため、所謂、滅菌用のケミカルインジケータ（以下、ＣＩ）が使用されている。ＣＩは、滅菌剤（蒸気や過酸化水素等）による滅菌処理に必要な条件の達成度合いに応じて変色する変色領域を有する。滅菌処理の達成度合いは、ＣＩの変色領域の色の変化を判定することによる行われるが、目視による判定では誤判定が生じ得る。このため、特許文献１は、光学的にＣＩの変色領域の色を読み取ることで、滅菌処理の達成度を測定する測定装置を開示している。 BACKGROUND ART The object to be sterilized in a container is sterilized by exposing the object to be sterilized to an atmosphere such as high-pressure steam or hydrogen peroxide. At this time, a so-called chemical indicator for sterilization (hereinafter, CI) is used in order to determine the degree of achievement of the sterilization treatment on the sterilization target. The CI has a discolored area that discolors in accordance with the degree of achievement of the conditions required for sterilization treatment with a sterilizing agent (steam, hydrogen peroxide, etc.). The degree of achievement of the sterilization process is performed by determining the color change of the CI discolored area, but a visual determination may cause an erroneous determination. Therefore, Patent Document 1 discloses a measuring device which optically measures the degree of achievement of the sterilization process by reading the color of the CI discolored area.
特許文献１は、ＣＩ（試験紙）の変色領域の初期状態の色と滅菌処理後に測定した色との色差により、滅菌処理の達成度を判定するものであるため、ＣＩの変色領域の色が、色空間において直線的に変化する場合にのみ適用可能である。したがって、変色領域の色が、色空間において直線的に変化しないＣＩを含む任意のＣＩに対して特許文献１の構成を適用することができない。 Patent Document 1 determines the degree of achievement of the sterilization process based on the color difference between the color in the initial state of the discolored region of the CI (test paper) and the color measured after the sterilization process. , Is applicable only when the color space changes linearly. Therefore, the configuration of Patent Document 1 cannot be applied to any CI including a CI in which the color of the color-changed region does not change linearly in the color space.
本発明は、試験紙の変色領域の色の変化の態様に拘わらず処理の達成度を判定できる判定技術を提供するものである。 The present invention provides a determination technique capable of determining the degree of achievement of processing regardless of the manner in which the color of the discolored area of the test paper changes.
本発明の一態様によると、所定の処理の達成度に応じて色が変化する変色領域を有する試験紙により前記所定の処理の達成度を判定する判定装置は、前記試験紙の前記変色領域の色値を測定する測定手段と、前記所定の処理の複数の達成度に対応する前記変色領域の複数の色を示す複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値を保持する保持手段と、前記測定手段が測定した前記試験紙の前記変色領域の測定色値と、前記複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値と、に基づき、前記所定の処理の達成度を判定する判定手段と、
を備えることを特徴とする。
According to an aspect of the present invention, the determination device for determining the degree of achievement of the predetermined processing by a test paper having a color-changing area in which the color changes according to the degree of achievement of the predetermined processing is A measuring unit for measuring a color value; a plurality of reference color values indicating a plurality of colors of the color change area corresponding to a plurality of achievement levels of the predetermined process; and two adjacent achievement levels of the plurality of achievement levels. Holding means for holding the threshold value corresponding to each set, the measurement color value of the color change area of the test paper measured by the measurement means, the plurality of reference color values, the two adjacent two of the plurality of achievement degree A threshold value corresponding to each of the achievement levels, based on the determination means, to determine the achievement level of the predetermined process,
It is characterized by including.
本発明によると、試験紙の変色領域の色の変化の態様に拘わらず処理の達成度を判定することができる。 According to the present invention, it is possible to determine the degree of achievement of processing regardless of the manner in which the color of the discolored area of the test paper changes.
以下、本発明の例示的な実施形態について図面を参照して説明する。なお、以下の実施形態は例示であり、本発明を実施形態の内容に限定するものではない。また、以下の各図においては、実施形態の説明に必要ではない構成要素については図から省略する。 Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. The following embodiments are exemplifications, and the present invention is not limited to the contents of the embodiments. Further, in each of the following drawings, components that are not necessary for explaining the embodiment are omitted from the drawings.
＜第一実施形態＞
図１（Ａ）及び図１（Ｂ）は、本実施形態による滅菌レベルの判定装置１の側面図及び正面図である。また、図１（Ｃ）は、図１（Ｂ）のＡ−Ａ線の断面図である。判定装置１は、ＣＩ２の挿入部４と、挿入部４に挿入されたＣＩ２を下流側の測定位置に搬送する搬送ローラ対６と、を有する。図１（Ａ）に示す様に、測定者が挿入部４からＣＩ２を挿入すると、搬送ローラ対６は、ＣＩ２を、図１（Ｃ）の実線で示す測定位置に搬送する。測定位置の対向側には分光計３が配置されている。分光計３は、ＣＩ２の表面に光７を照射し、その反射光を受光することで、ＣＩ２の変色領域の分光反射率を測定する。測定後、搬送ローラ対６の逆回転により、ＣＩ２は、判定装置１から排出される。制御部８は、判定装置１を制御する。制御部８は、滅菌処理の達成度の判定に使用する種々の情報を保持する記憶部９と、各種の演算処理等を行う演算処理部１０と、を有する。演算処理部１０は、分光計３が測定した分光反射率に基づき変色領域の色値を判定する。さらに、演算処理部１０は、変色領域の色値に基づき滅菌処理の達成度を判定する。また、判定装置１は、表示部５を有する。制御部８は、滅菌処理の達成度の判定結果を表示部５に表示する。
<First embodiment>
1A and 1B are a side view and a front view of a sterilization level determination device 1 according to the present embodiment. Further, FIG. 1C is a cross-sectional view taken along line AA of FIG. The determination device 1 includes an insertion portion 4 of the CI 2 and a pair of conveyance rollers 6 that conveys the CI 2 inserted in the insertion portion 4 to a downstream measurement position. As shown in FIG. 1(A), when the measurer inserts CI2 from the insertion section 4, the conveyance roller pair 6 conveys CI2 to the measurement position shown by the solid line in FIG. 1(C). The spectrometer 3 is arranged on the opposite side of the measurement position. The spectrometer 3 irradiates the surface of the CI 2 with the light 7 and receives the reflected light to measure the spectral reflectance of the CI 2 in the discolored region. After the measurement, the CI 2 is ejected from the determination device 1 by the reverse rotation of the transport roller pair 6. The control unit 8 controls the determination device 1. The control unit 8 has a storage unit 9 that holds various information used to determine the degree of achievement of the sterilization process, and an arithmetic processing unit 10 that performs various arithmetic processes. The arithmetic processing unit 10 determines the color value of the color change area based on the spectral reflectance measured by the spectrometer 3. Further, the arithmetic processing unit 10 determines the degree of achievement of the sterilization process based on the color value of the discolored area. The determination device 1 also includes a display unit 5. The control unit 8 displays the determination result of the degree of achievement of the sterilization process on the display unit 5.
図２は、本実施形態によるＣＩ２を示している。ＣＩ２は、シート状の試験紙であり、表面に化学的処理が施された変色領域２１を有する。変色領域２１は、滅菌処理の達成度に応じてその色が変化する。本実施形態において、ＣＩ２の変色領域２１は、初期状態において色値Ｃ＃１であり、滅菌処理の達成度に応じて色値Ｃ＃２〜色値Ｃ＃９へと変化し、最終的には色値Ｃ＃１０で一定となる様に構成されているものとする。なお、変色領域２１は、色値Ｃ＃１〜色値Ｃ＃１０へと連続的に変化する。つまり、変色領域は、色値Ｃ＃１〜色値＃１０以外の色値も取り得る。以下の説明において、色値Ｃ＃ｋ（ｋは１から１０までの整数）となるときの条件達成度を達成度＃ｋとする。図３は、各達成度＃１〜＃１０における変色領域２１の色値Ｃ＃１〜Ｃ＃１０をＬ*ａ＊ｂ＊色空間の座標として示したものである。なお、図３には、判定装置１が測定したＣＩ２の変色領域２１の測定色値Ｃｔの当該色空間における座標も示している。 FIG. 2 shows a CI 2 according to this embodiment. CI2 is a sheet-shaped test paper, and has a discolored area 21 whose surface is chemically treated. The color of the discolored area 21 changes according to the degree of achievement of the sterilization process. In the present embodiment, the color change area 21 of CI2 has the color value C#1 in the initial state, changes from the color value C#2 to the color value C#9 according to the degree of achievement of the sterilization process, and finally, Is configured to be constant with the color value C#10. The color change area 21 continuously changes from the color value C#1 to the color value C#10. That is, the discolored area can have color values other than the color values C#1 to #10. In the following description, the condition achievement level when the color value is C#k (k is an integer from 1 to 10) is defined as the achievement level #k. FIG. 3 shows the color values C#1 to C#10 of the color changing area 21 at the respective achievement levels #1 to #10 as coordinates in the L*a*b* color space. Note that FIG. 3 also shows the coordinates of the measured color value Ct of the color change area 21 of CI 2 measured by the determination device 1 in the color space.
以下の説明において、達成度＃１〜＃１０に対応する色値Ｃ＃１〜Ｃ＃１０を基準色値と呼ぶものとする。また、色空間において、基準色値Ｃ＃ｍ（ｍは１から９までの整数）と基準色値Ｃ＃ｍ＋１とを結ぶ線分を線分Ｌｍ（ｍ＋１）と表記する。本実施形態では、線分Ｌｍ（ｍ＋１）上に、予め境界点Ｔｍ（ｍ＋１）を設定する。さらに、以下の説明において、基準色値Ｃ＃ｋと、測定色値Ｃｔとの色差をΔＥｋと表記する。また、以下の説明において、色値を単に色とも表現する。 In the following description, the color values C#1 to C#10 corresponding to the achievement levels #1 to #10 will be referred to as reference color values. In the color space, a line segment connecting the reference color value C#m (m is an integer from 1 to 9) and the reference color value C#m+1 is expressed as a line segment Lm(m+1). In the present embodiment, the boundary point Tm(m+1) is set in advance on the line segment Lm(m+1). Further, in the following description, the color difference between the reference color value C#k and the measured color value Ct is expressed as ΔEk. Further, in the following description, the color value is also simply expressed as a color.
本実施形態において、制御部８は、測定色Ｃｔとの色差が一番小さい基準色を判定する。以下の説明において、測定色Ｃｔとの色差が一番小さい基準色を第１選択基準色と呼び、第１選択基準色に対応する達成度を第１選択達成度と呼ぶものとする。続いて、制御部８は、第１選択達成度に隣接する達成度が２つであるか１つであるかを判定する。第１選択達成度に隣接する達成度が１つになるのは、第１選択達成度が達成度＃１や達成度＃１０のときのみである。制御部８は、第１選択達成度に隣接する達成度が１つであると、この隣接する達成度を第２選択達成度とする。一方、制御部８は、第１選択達成度に隣接する達成度が２つの場合、当該２つの達成度に対応する基準色の内、測定色Ｃｔとの色差がより小さい基準色に対応する達成度を第２選択達成度とする。なお、以下の説明において第２選択達成度に対応する基準色を第２選択基準色と呼ぶものとする。図３においては、基準色Ｃ＃８が第１選択基準色であり、基準色Ｃ＃７が第２選択基準色である。なお、以下の説明においては、第１選択基準色と第２選択基準色とを纏めて選択基準色と呼び、第１選択達成度と第２選択達成度を纏めて選択達成度と呼ぶものとする。さらに、以下の説明においては、選択基準色間の線分を選択線分と呼び、選択線分上に設定した境界点を選択境界点と呼ぶものとする。 In the present embodiment, the control unit 8 determines the reference color having the smallest color difference from the measurement color Ct. In the following description, the reference color having the smallest color difference from the measured color Ct is referred to as the first selection reference color, and the achievement level corresponding to the first selection reference color is referred to as the first selection achievement level. Subsequently, the control unit 8 determines whether the achievement level adjacent to the first selection achievement level is two or one. The achievement level adjacent to the first selection achievement level becomes one only when the first selection achievement level is the achievement level #1 or the achievement level #10. When the achievement level adjacent to the first selection achievement level is one, the control unit 8 sets the adjacent achievement level as the second selection achievement level. On the other hand, when there are two achievement levels adjacent to the first selection achievement level, the control unit 8 achieves one of the reference colors corresponding to the two achievement levels that corresponds to the reference color having a smaller color difference from the measurement color Ct. The degree is defined as the degree of achievement of the second selection. In the following description, the reference color corresponding to the degree of achievement of the second selection will be referred to as the second selection reference color. In FIG. 3, the reference color C#8 is the first selection reference color and the reference color C#7 is the second selection reference color. In the following description, the first selection reference color and the second selection reference color are collectively referred to as a selection reference color, and the first selection achievement degree and the second selection achievement degree are collectively referred to as a selection achievement degree. To do. Further, in the following description, the line segment between the selection reference colors will be referred to as a selection line segment, and the boundary point set on the selection line segment will be referred to as a selection boundary point.
以下、測定色Ｃｔに基づき、滅菌処理の達成度をどの様に判定するかについて説明する。以下の説明は、図３に示す色空間を前提とし、以下の説明における基準色Ｃ＃１〜Ｃ＃１０、測定色Ｃｔ、及び、交点等は、当該色空間における一点、つまり、座標と同様の意味で使用する。 Hereinafter, how to determine the degree of achievement of the sterilization process based on the measured color Ct will be described. The following description is based on the color space shown in FIG. 3, and the reference colors C#1 to C#10, the measurement color Ct, and the intersections in the following description are the same as one point in the color space, that is, the coordinates. Used in the sense of.
まず、本実施形態では、図４に示す様に、選択線分Ｌ７８と、測定色Ｃｔから選択線分Ｌ７８に引いた垂線Ｏとの交点Ｍを求める。そして、本実施形態では、図４に示す様に、交点Ｍが、選択境界点Ｔ７８と選択基準色Ｃ＃８との間にあると、測定色Ｃｔに基づく滅菌処理の達成度を達成度＃８と判定する。一方、図５に示す様に、交点Ｍが、選択境界点Ｔ７８と選択基準色Ｃ＃７との間にあると、測定色Ｃｔに基づく滅菌処理の達成度を達成度＃７と判定する。 First, in the present embodiment, as shown in FIG. 4, an intersection M of the selection line segment L78 and the perpendicular O drawn from the measurement color Ct to the selection line segment L78 is obtained. Then, in the present embodiment, as shown in FIG. 4, when the intersection point M is between the selection boundary point T78 and the selection reference color C#8, the achievement level of the sterilization process based on the measurement color Ct is calculated as the achievement level # Determined as 8. On the other hand, as shown in FIG. 5, when the intersection point M is between the selection boundary point T78 and the selection reference color C#7, the achievement level of the sterilization process based on the measurement color Ct is determined to be the achievement level #7.
各線分Ｌｍ（ｍ＋１）上の境界点Ｔｍ（ｍ＋１）の位置は、事前の実験等により、達成度の判定結果が実際の達成度に近くなる様に決定する。この構成により、試験紙の変色領域２１の色の達成度による変化がどの様なものであっても、例えば、色空間において、達成度に応じて線形的に変化しない場合であっても、達成度を精度良く判定することができる。 The position of the boundary point Tm(m+1) on each line segment Lm(m+1) is determined by a preliminary experiment or the like so that the achievement level determination result is close to the actual achievement level. With this configuration, it is possible to achieve any change in the color of the discoloration area 21 of the test paper depending on the achievement level, for example, even if the color space does not change linearly according to the achievement level. The degree can be accurately determined.
なお、図４及び図５は、選択線分と、測定色Ｃｔから選択線分への垂線Ｏとの交点が、選択線分内に存在する場合を示している。しかしながら、測定色Ｃｔと２つの選択基準色を頂点とする三角形の、第１選択基準色に対応する頂点の内角が鈍角、つまり、９０度より大きいと、測定色Ｃｔから引いた選択線分と直交する垂線Ｏは、選択線分の外側になり、選択線分と交点Ｍを持たなくなる。図６は、その様な状態を示している。図６において、測定色Ｃｔから引いた選択線分Ｌ３４に直交する垂線Ｏは、選択線分Ｌ３４と交点を持たない。この場合、測定色Ｃｔに対応する達成度は、達成度＃４を超えていると判定できる。このため、本実施形態では、選択基準色を基準色Ｃ＃４及びＣ＃５に変更し、図７に示す様に、選択線分Ｌ４５と、測定色Ｃｔから選択線分Ｌ４５に引いた垂線Ｏとの交点Ｍを求める。そして、上述した様に、選択境界点Ｔ４５と、交点Ｍとの位置関係に基づき、滅菌処理の達成度を判定する。図７の例において、交点Ｍは、選択境界点Ｔ４５と、選択基準色Ｃ＃４との間にあるため、達成度は達成度＃４となる。 4 and 5 show the case where the intersection of the selection line segment and the perpendicular line O from the measurement color Ct to the selection line segment exists in the selection line segment. However, if the interior angle of the vertex corresponding to the first selection reference color of the triangle having the measurement color Ct and the two selection reference colors as vertices is an obtuse angle, that is, greater than 90 degrees, the selection line segment drawn from the measurement color Ct The perpendicular line O orthogonal to each other is located outside the selection line segment and has no intersection M with the selection line segment. FIG. 6 shows such a state. In FIG. 6, the perpendicular line O orthogonal to the selection line segment L34 drawn from the measurement color Ct does not have an intersection with the selection line segment L34. In this case, it can be determined that the achievement level corresponding to the measurement color Ct exceeds the achievement level #4. Therefore, in the present embodiment, the selection reference color is changed to the reference colors C#4 and C#5, and as shown in FIG. 7, the selection line segment L45 and the perpendicular line drawn from the measurement color Ct to the selection line segment L45. Find the intersection M with O. Then, as described above, the degree of achievement of the sterilization process is determined based on the positional relationship between the selected boundary point T45 and the intersection point M. In the example of FIG. 7, since the intersection M is between the selection boundary point T45 and the selection reference color C#4, the achievement level is the achievement level #4.
なお、図６では、２つの選択達成度の内、第１選択達成度が第２選択達成度より高いため、第１選択達成度の次に達成度の高い達成度＃５を新たな第２選択達成度としていた。しかしながら、２つの選択達成度の内、第１選択達成度が第２選択達成度より低い場合、第１選択達成度の次に達成度の低い達成度を新たな第２選択達成度とする。例えば、第１選択達成度が達成度＃３であり、第２選択達成度が達成度＃４であり、第１選択基準色Ｃ＃３に対応する内角が鈍角であるものとする。この場合、第１選択基準色Ｃ＃３に対応する達成度＃３に隣接する達成度であって、第２選択基準色Ｃ＃４に対応する達成度＃４とは逆側の達成度＃２に対応する基準色Ｃ＃２が新たな選択基準色となる。 In FIG. 6, the first selection achievement is higher than the second selection achievement out of the two selection achievements. Therefore, the achievement #5 having the highest achievement next to the first selection achievement is changed to the new second achievement. It was the degree of achievement of selection. However, of the two selection achievement levels, when the first selection achievement level is lower than the second selection achievement level, the achievement level next to the first selection achievement level is set as the new second selection achievement level. For example, it is assumed that the first selection achievement level is the achievement level #3, the second selection achievement level is the achievement level #4, and the interior angle corresponding to the first selection reference color C#3 is an obtuse angle. In this case, the achievement level adjacent to the achievement level #3 corresponding to the first selection reference color C#3 and on the opposite side to the achievement level #4 corresponding to the second selection reference color C#4 # The reference color C#2 corresponding to 2 becomes a new selection reference color.
なお、第１選択達成度が達成度＃１であり、第１選択基準色に対応する頂点が鈍角である場合、達成度＃１より低い達成度は存在しない。この場合、制御部８は、滅菌処理の達成度を、第１選択達成度と判定する。同様に、第１選択達成度が達成度＃１０であり、第１選択基準色に対応する頂点が鈍角であっても、達成度＃１０より高い達成度は存在しない。この場合も、制御部８は、滅菌処理の達成度を、第１選択達成度と判定する。さらに、図８に示す様な場合、選択線分が線分Ｌ３４であっても、線分Ｌ４５であっても、測定色Ｃｔから引いた選択線分と直交する線Ｏは、選択線分と交点を持たない。この場合も、制御部８は、滅菌処理の達成度を、測定色Ｃｔとの色差が最も小さい第１選択基準色Ｃ＃４に対応する達成度＃４と判定する。 If the first selection achievement level is the achievement level #1 and the vertex corresponding to the first selection reference color is an obtuse angle, there is no achievement level lower than the achievement level #1. In this case, the control unit 8 determines the achievement level of the sterilization process as the first selection achievement level. Similarly, even if the first selection achievement level is the achievement level #10 and the vertex corresponding to the first selection reference color is an obtuse angle, there is no achievement level higher than the achievement level #10. In this case as well, the control unit 8 determines that the degree of achievement of the sterilization process is the degree of achievement of the first selection. Further, in the case as shown in FIG. 8, whether the selected line segment is the line segment L34 or the line segment L45, the line O orthogonal to the selected line segment drawn from the measurement color Ct is the selected line segment. It has no intersection. In this case also, the control unit 8 determines the achievement level of the sterilization process to be the achievement level #4 corresponding to the first selection reference color C#4 having the smallest color difference from the measurement color Ct.
なお、測定色Ｃｔが、選択基準色を結ぶ選択線分上にある場合には、測定色Ｃｔの座標を交点Ｍとして判定する。図９は、その様な場合の例であり、測定色Ｃｔは、選択線分Ｌ８９上にある。図９の例において、測定色Ｃｔは、選択基準色Ｃ＃８と選択境界点Ｔ８９との間にあるため、滅菌処理の達成度は、達成度＃８と判定される。 When the measurement color Ct is on the selection line segment connecting the selection reference colors, the coordinates of the measurement color Ct are determined as the intersection point M. FIG. 9 shows an example of such a case, and the measurement color Ct is on the selection line segment L89. In the example of FIG. 9, since the measurement color Ct is between the selection reference color C#8 and the selection boundary point T89, the achievement level of the sterilization process is determined to be the achievement level #8.
図１０は、本実施形態による滅菌処理の達成度を判定する処理のフローチャートである。Ｓ１０で、制御部８は、分光計３の測定結果に基づきＣＩ２の変色領域２１の色を判定して測定色Ｃｔを取得する。Ｓ１１で、制御部８は、各基準色と測定色との色差に基づき第１選択基準色と第２選択基準色の２つの選択基準色を選択する。Ｓ１２で、制御部８は、選択基準色間の線分である選択線分と、測定色Ｃｔから引いた当該選択線分に直交する線とが交点Ｍを持つか否かを判定する。なお、測定色Ｃｔが選択線分上にある場合、測定色Ｃｔの座標を交点Ｍと判定する。交点Ｍを持つ場合、制御部８は、Ｓ１６で、選択線分上の選択境界点と交点Ｍとの位置関係に基づき滅菌処理の達成度を判定する。一方、Ｓ１２で、交点Ｍを持たない場合、制御部８は、Ｓ１３で、第２選択基準色を変更する。具体的には、第１選択達成度に隣接し、かつ、現在の第２選択達成度とは第１選択達成度に対して逆側となる達成度に対応する基準色を新たな第２選択基準色とする。 FIG. 10 is a flowchart of a process for determining the degree of achievement of the sterilization process according to this embodiment. In S10, the control unit 8 determines the color of the color change area 21 of CI2 based on the measurement result of the spectrometer 3 and acquires the measurement color Ct. In S11, the control unit 8 selects two selection reference colors of the first selection reference color and the second selection reference color based on the color difference between each reference color and the measurement color. In S12, the control unit 8 determines whether or not the selection line segment that is the line segment between the selection reference colors and the line that is orthogonal to the selection line segment that is drawn from the measurement color Ct have the intersection point M. When the measurement color Ct is on the selected line segment, the coordinate of the measurement color Ct is determined as the intersection point M. When the intersection point M exists, the control unit 8 determines the degree of achievement of the sterilization process based on the positional relationship between the selection boundary point on the selection line segment and the intersection point M in S16. On the other hand, if there is no intersection M in S12, the control unit 8 changes the second selection reference color in S13. Specifically, a reference color corresponding to the achievement level adjacent to the first selection achievement level and on the opposite side of the current second selection achievement level from the current second selection achievement level is newly selected as the second selection color. Use as the standard color.
Ｓ１４で、制御部８は、選択線分と、測定色Ｃｔから引いた当該選択線分に直交する線とが交点Ｍを持つか否かを判定する。交点Ｍを持つ場合、制御部８は、Ｓ１６で、選択線分上の選択境界点と交点Ｍとの位置関係に基づき滅菌処理の達成度を判定する。一方、交点Ｍを持たない場合、制御部８は、Ｓ１５で、滅菌処理の達成度を第１選択基準色に対応する第１選択達成度であると判定する。 In S14, the control unit 8 determines whether or not the selected line segment and the line drawn from the measurement color Ct and orthogonal to the selected line segment have an intersection point M. When the intersection point M exists, the control unit 8 determines the degree of achievement of the sterilization process based on the positional relationship between the selection boundary point on the selection line segment and the intersection point M in S16. On the other hand, when there is no intersection M, the control unit 8 determines in S15 that the achievement level of the sterilization process is the first selection achievement level corresponding to the first selection reference color.
なお、境界点Ｔｍ（ｍ＋１）の位置は、線分Ｌｍ（ｍ＋１）上の任意の位置に設定できる。例えば、境界点Ｔｍ（ｍ＋１）の位置は、２つの選択基準色の一方の基準色Ｃ＃ｍ＋１と同じ位置とすることもできる。この構成により、測定色Ｃｔの位置を選択線分上に投影した位置（交点Ｍ）が、基準色Ｃ＃ｍ＋１と同じではない限り、達成度＃ｍと判定されることになる。同様に、境界点Ｔｍ（ｍ＋１）の位置は、２つの選択基準色の他方の基準色Ｃ＃ｍと同じ位置とすることもできる。なお、交点Ｍと境界点Ｔｍ（ｍ＋１）の位置が同じであると、滅菌処理の達成度を達成度＃ｍと判定する構成とすることも、達成度＃ｍ＋１と判定する構成とすることもできる。 The position of the boundary point Tm(m+1) can be set to any position on the line segment Lm(m+1). For example, the position of the boundary point Tm(m+1) may be the same position as the reference color C#m+1 of the two selection reference colors. With this configuration, unless the position (intersection M) obtained by projecting the position of the measurement color Ct on the selection line segment is the same as the reference color C#m+1, the achievement level #m is determined. Similarly, the position of the boundary point Tm(m+1) can be the same position as the other reference color C#m of the two selection reference colors. When the position of the intersection point M and the boundary point Tm(m+1) are the same, the achievement level of the sterilization process may be determined as the achievement level #m, or the achievement level #m+1 may be determined. it can.
以上、複数の達成度に対応する複数の基準色を設定し、色空間において、隣接する２つの達成度に対応する基準色を結ぶ線分上に境界点（閾値）を設定する。そして、測定色Ｃｔとの色差に基づき２つの選択基準色を選択し、この選択基準色間を結ぶ選択線分上の境界点と、測定色Ｃｔとの位置関係に基づき滅菌処理の達成度を判定する。この構成により、滅菌処理の達成度による、所定の表色系の色空間における変色領域２１の色の変化の軌跡に拘わらず、境界点を適切に設定することで精度良く、滅菌処理の達成度を判定することができる。つまり、滅菌処理の達成度による変色領域２１の色の変化は、ＣＩ２の種別により異なり得るが、本実施形態による判定装置１は、境界点の設定を変更するのみで、ＣＩ２の種別に拘わらず、精度良く、滅菌処理の達成度を判定することができる。 As described above, a plurality of reference colors corresponding to a plurality of achievement levels are set, and a boundary point (threshold value) is set on a line segment connecting the reference colors corresponding to two adjacent achievement levels in the color space. Then, two selection reference colors are selected based on the color difference from the measurement color Ct, and the achievement level of the sterilization process is determined based on the positional relationship between the measurement color Ct and the boundary point on the selection line segment connecting the selection reference colors. judge. With this configuration, regardless of the locus of the color change of the discoloration area 21 in the color space of the predetermined color system depending on the degree of achievement of the sterilization process, the boundary points are appropriately set to accurately and accurately achieve Can be determined. That is, the change in color of the discolored area 21 depending on the degree of achievement of the sterilization process may differ depending on the type of CI2, but the determination device 1 according to the present embodiment only changes the setting of the boundary point, regardless of the type of CI2. Therefore, the degree of achievement of the sterilization process can be accurately determined.
＜ＣＩについて＞
図２に示す様に、上記各実施形態において、ＣＩ２は、下地とは異なる色の方形状の変色領域２１を有し、この変色領域２１の色が滅菌処理の達成度に応じて変化するものであった。なお、変色領域２１の色とは、透明を含む。つまり、変色領域２１が初期的には透明であり、滅菌処理の達成度に応じて色が現れる様な場合も本発明における変色領域２１の"変色"又は"色の変化"に含まれる。同様に、変色領域２１が初期的には透明ではないが、滅菌処理の達成度に応じて変色領域２１が透明となる様な場合も本発明における変色領域２１の"変色"又は"色の変化"に含まれる。さらに、下地部分が透明であっても良い。
<About CI>
As shown in FIG. 2, in each of the above-described embodiments, the CI 2 has a square-shaped color changing region 21 having a color different from that of the base, and the color of the color changing region 21 changes according to the degree of achievement of the sterilization process. Met. The color of the discolored area 21 includes transparency. That is, the case where the discolored area 21 is initially transparent and a color appears depending on the degree of achievement of the sterilization treatment is also included in the "discolored" or "color change" of the discolored area 21 in the present invention. Similarly, in the case where the discolored area 21 is not initially transparent, but the discolored area 21 becomes transparent depending on the degree of achievement of the sterilization process, the "discolored" or "color change" of the discolored area 21 in the present invention. "include. Further, the base portion may be transparent.
また、例えば、変色領域２１の色は、初期的には下地の色と同じであっても良い。さらに、滅菌処理の達成度に応じて変色領域２１の全体が一様に変色する必要はない。例えば、変色領域２１全体が初期的には下地の色と同じであり、滅菌処理の達成度に応じた長さ部分が下地とは異なる色に変化しても良い。なお、初期的には変色領域２１が下地の色とは異なる部分を有し、滅菌処理の達成度に応じて下地の色とは異なる部分の長さが長くなる形態であっても良い。逆に、滅菌処理の達成度が高くなるにつれて、下地の色とは異なる部分の長さが短くなる形態であっても良い。 Further, for example, the color of the discolored area 21 may be initially the same as the background color. Furthermore, it is not necessary for the entire discolored area 21 to discolor uniformly depending on the degree of achievement of the sterilization process. For example, the entire discolored area 21 may initially be the same as the background color, and the length portion depending on the degree of achievement of sterilization may be changed to a color different from the background. Note that the discolored area 21 may initially have a portion different from the background color, and the length of the portion different from the background color may be longer depending on the degree of achievement of the sterilization process. On the contrary, as the degree of achievement of the sterilization treatment becomes higher, the length of the portion different from the background color may become shorter.
＜その他の実施形態＞
なお、上記実施形態においては、１つの判定装置１内でＣＩ２の変色領域２１の測色と、滅菌処理の達成度の判定の両方を行った。しかしながら、変色領域２１の色値を測定する測定装置と、滅菌処理の達成度を判定する判定装置とを個別の装置とすることもできる。この場合、測定装置と判定装置とは、有線又は無線により接続され、相互に通信可能な様に構成される。或いは、測定装置と判定装置は、ネットワークを介して通信可能な様に構成される。つまり、本発明は、相互に通信できる測定装置と判定装置とを含む判定システムとして実現することができる。判定システムは、１つ以上の測定装置と、判定装置とを含むものとすることができる。例えば、測定装置は、分光計３を有し、ＣＩ２の変色領域２１を測定して色値を判定し、判定した色値を判定装置に出力する。判定装置は、複数の達成度に対応する複数の基準色値と、隣接する２つの達成度の組それぞれの閾値を有し、取得した色値に基づき滅菌処理の達成度を判定する。なお、測定装置が、色値を判定するのではなく、例えば、変色領域２１の分光反射率といった色値を判定するための情報を測定して判定装置に出力し、判定装置が色値を判定する構成であっても良い。なお、判定装置のハードウェアには、汎用のコンピュータを使用することができる。つまり、コンピュータの１つ以上のプロセッサに適切なプログラムを実行させることで、判定装置を実現することができる。さらに、本発明は、判定方法として実現することもできる。
<Other embodiments>
In the above embodiment, both the color measurement of the discolored area 21 of the CI 2 and the determination of the degree of achievement of the sterilization process were performed in one determination device 1. However, the measuring device that measures the color value of the discolored area 21 and the determining device that determines the degree of achievement of the sterilization process may be separate devices. In this case, the measurement device and the determination device are connected by wire or wirelessly so that they can communicate with each other. Alternatively, the measuring device and the determining device are configured to be communicable via a network. That is, the present invention can be realized as a determination system including a measurement device and a determination device that can communicate with each other. The determination system can include one or more measurement devices and a determination device. For example, the measuring device has the spectrometer 3, measures the color change area 21 of the CI 2 to judge the color value, and outputs the judged color value to the judging device. The determination device has a plurality of reference color values corresponding to the plurality of achievement levels and thresholds of two adjacent sets of achievement levels, and determines the achievement level of the sterilization process based on the acquired color values. The measuring device does not determine the color value, but measures the information for determining the color value, such as the spectral reflectance of the discolored area 21, and outputs the information to the determining device, and the determining device determines the color value. It may be configured to do so. A general-purpose computer can be used as the hardware of the determination device. That is, the determination device can be realized by causing one or more processors of the computer to execute an appropriate program. Furthermore, the present invention can be realized as a determination method.
また、上記各実施形態では、滅菌処理の達成度を判定する判定装置を例にして本発明の説明を行った。しかしながら、本発明は、処理の達成度に応じて色が変化する変色領域を有する試験紙が用いられる任意の処理の達成度の判定に対して適用することができる。 Further, in each of the above-described embodiments, the present invention has been described by taking the determination device that determines the degree of achievement of the sterilization process as an example. However, the present invention can be applied to the determination of the degree of achievement of any treatment in which a test paper having a discolored area whose color changes according to the degree of achievement of treatment is used.
本発明は、上述の実施形態の１以上の機能を実現するプログラムを、ネットワーク又は記憶媒体を介してシステム又は装置に供給し、そのシステム又は装置のコンピュータにおける１つ以上のプロセッサがプログラムを読出し実行する処理でも実現可能である。また、１以上の機能を実現する回路（例えば、ＡＳＩＣ）によっても実現可能である。 The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. It can also be realized by the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
３：分光計、９：記憶部、１０：演算処理部 3: spectrometer, 9: storage unit, 10: arithmetic processing unit
Claims (20)
前記試験紙の前記変色領域の色値を測定する測定手段と、
前記所定の処理の複数の達成度に対応する前記変色領域の複数の色を示す複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値を保持する保持手段と、
前記測定手段が測定した前記試験紙の前記変色領域の測定色値と、前記複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値と、に基づき、前記所定の処理の達成度を判定する判定手段と、
を備えることを特徴とする判定装置。 A determination device for determining the degree of achievement of the predetermined processing by a test paper having a color-changing area in which the color changes in accordance with the degree of achievement of the predetermined processing,
Measuring means for measuring the color value of the discolored area of the test paper,
A plurality of reference color values indicating a plurality of colors of the discolored area corresponding to a plurality of achievement levels of the predetermined process and a threshold value corresponding to each pair of two neighboring achievement levels of the plurality of achievement levels are held. Holding means,
Based on the measured color value of the discolored area of the test paper measured by the measuring means, the plurality of reference color values, and a threshold value corresponding to each of two adjacent achievement levels of the plurality of achievement levels, A determining means for determining the degree of achievement of the predetermined process,
A determination device comprising:
前記測定色値を示す情報を取得する取得手段と、
前記所定の処理の複数の達成度に対応する前記変色領域の複数の色を示す複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値を保持する保持手段と、
前記測定色値と、前記複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値とに基づき、前記所定の処理の達成度を判定する判定手段と、
を備えることを特徴とする判定装置。 A determination device for determining the degree of achievement of the predetermined processing based on the measured color value of the color-changed area in which the color changes according to the degree of achievement of the predetermined processing,
An acquisition unit that acquires information indicating the measured color value,
A plurality of reference color values indicating a plurality of colors of the discolored area corresponding to a plurality of achievement levels of the predetermined process and a threshold value corresponding to each pair of two neighboring achievement levels of the plurality of achievement levels are held. Holding means,
Determination means for determining the achievement level of the predetermined process based on the measured color value, the plurality of reference color values, and a threshold value corresponding to each of two adjacent achievement level groups of the plurality of achievement levels; ,
A determination device comprising:
前記所定の処理の複数の達成度に対応する前記変色領域の複数の色を示す複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値を保持する保持手段と、
前記試験紙の前記変色領域の測定された測定色値と、前記複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値とに基づき、前記所定の処理の達成度を判定する判定手段と、
を備えることを特徴とする判定システム。 A determination system for determining the degree of achievement of the predetermined processing by a test paper having a color change area in which the color changes in accordance with the degree of achievement of the predetermined processing,
A plurality of reference color values indicating a plurality of colors of the discolored area corresponding to a plurality of achievement levels of the predetermined process and a threshold value corresponding to each pair of two neighboring achievement levels of the plurality of achievement levels are held. Holding means,
Based on the measured color values measured in the discolored area of the test paper, the plurality of reference color values, and the threshold values corresponding to each of two adjacent achievement levels of the plurality of achievement levels, the predetermined value is determined. Determination means for determining the degree of achievement of processing,
A determination system comprising:
取得手段が、前記試験紙の前記変色領域の測定された測定色値を取得する取得ステップと、
判定手段が、前記所定の処理の複数の達成度に対応する前記変色領域の複数の色を示す複数の基準色値と、前記複数の達成度の隣接する２つの達成度の組それぞれに対応する閾値と、前記測定色値と、に基づき、前記所定の処理の達成度を判定する判定ステップと、
を含むことを特徴とする判定方法。 A determination method for determining the degree of achievement of the predetermined processing by a test paper having a color-changing area in which the color changes according to the degree of achievement of the predetermined processing,
An acquisition step in which the acquisition means acquires the measured color value measured in the discolored area of the test paper;
The determination means corresponds to each of a plurality of reference color values indicating a plurality of colors of the color-change area corresponding to a plurality of achievement levels of the predetermined process and two adjacent achievement levels of the plurality of achievement levels. Based on the threshold and the measured color value, a determination step of determining the degree of achievement of the predetermined processing,
A determination method comprising:
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| JP2018222688A JP2020081540A (en) | 2018-11-28 | 2018-11-28 | Processing achievement degree determination apparatus, determination system, determination method, and program |
| PCT/JP2019/044549 WO2020110730A1 (en) | 2018-11-28 | 2019-11-13 | Apparatus that determines achievement degree of process, determination system, determination method, and program |
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|---|---|---|---|---|
| WO2021199963A1 (en) * | 2020-03-30 | 2021-10-07 | キヤノン株式会社 | Color-measuring device for sheet |
| CN114225079A (en) * | 2021-12-31 | 2022-03-25 | 老肯医疗科技股份有限公司 | Device for quantifying sterilization effect of hydrogen peroxide low-temperature plasma sterilizer |
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| US6884394B1 (en) * | 1999-08-05 | 2005-04-26 | 3M Innovative Properties Company | Chemical indicator reader |
| JP2003325646A (en) | 2002-05-16 | 2003-11-18 | Sakura Color Prod Corp | Sterilization level measuring instrument and method |
| US7652268B2 (en) * | 2006-01-31 | 2010-01-26 | Jp Laboratories, Inc | General purpose, high accuracy dosimeter reader |
| US9285323B2 (en) * | 2012-08-08 | 2016-03-15 | Scanadu Incorporated | Quantifying color changes of chemical test pads induced concentrations of biological analytes under different lighting conditions |
| JP6237291B2 (en) * | 2014-02-06 | 2017-11-29 | 富士通株式会社 | Information processing apparatus, color interpolation method, program, and table generation method |
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|---|---|---|---|---|
| WO2021199963A1 (en) * | 2020-03-30 | 2021-10-07 | キヤノン株式会社 | Color-measuring device for sheet |
| CN114225079A (en) * | 2021-12-31 | 2022-03-25 | 老肯医疗科技股份有限公司 | Device for quantifying sterilization effect of hydrogen peroxide low-temperature plasma sterilizer |
| CN114225079B (en) * | 2021-12-31 | 2023-05-26 | 老肯医疗科技股份有限公司 | Device for quantifying sterilization effect of hydrogen peroxide low-temperature plasma sterilizer |
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