JPH03289942A - Method and device for measuring sectional area of hair - Google Patents

Abstract

PURPOSE:To more reliably measure the sectional area of a hair various deformation of which is predicted by computing the sectional area of the air from the area of an oval in which a pair of outer diameters measured from directions extending at right angles with each other form a long and a short diameter. CONSTITUTION:Outer diameter values D measured from eighteen directions in the direction of the theta-coodinate axis in relation to ten measuring sections in the direction of the Y-coodinate axis are calculated by an outer diameter calculating device 25, based on an edge detecting signal from a projecting and receiving device 22, each calculating outer diameter being stored in an outer diameter memory means 42. Areas (pi.Da.Db/4) of nine sets of ovals wherein, in relation to each measuring section, a pair of outer diameter values, i.e., Da (i.p, m.phi) and Db (i.p, m.phi+90), form a long and a short diameter, respectively, measured from directions extending at right angles with each other, are computed. An average value S(i) of the calculating areas of nine sets of ovals is computed at each measuring section by means of an oval area computing means 43. Thus, the sectional area of each measuring section is an average area of the areas of nine sets of the ovals and a value extremely equal to the true sectional area of a hair is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a hair cross-sectional area measuring method and apparatus for measuring the cross-sectional area of hair in order to examine its characteristics.

[Traditional technique! ] It is necessary to measure the characteristics of hair in order to investigate the effects of various chemicals on hair, which differs from person to person.

As conventional techniques related to such methods for measuring hair characteristics, Japanese Patent Application Laid-open No. 60-22604 and Japanese Patent Application Laid-open No. 61-443 are known.
The one described in Publication No. 01 is known.

The Maedo publication describes a hair testing method in which a needle attached to the tip of a cantilever is moved in the length direction of the hair, and the vibrations of the cantilever are converted into electrical pulses to examine the condition of the hair epidermis. has been done.

The latter publication also describes a contact scanner for hair inspection that measures the cuticle of the hair and is equipped with two clamps that clamp the hair and a device that applies tension to the hair between the clamps.

Both of these are techniques for inspecting the condition of the hair surface.
In order to understand the characteristics of hair, it is also important to know the cross-sectional area of hair and its changes.

As a prior art related to this type of cross-sectional area measuring method and device, the one described in Japanese Patent Application Laid-Open No. 62-274207 is known. Further, as a conventional technique regarding the VR device for measuring the outer diameter, those described in Japanese Patent Application Laid-Open No. 63-71613 and Japanese Patent Application Laid-Open No. 63-8233 are known.

To explain the conventional technology described in the above-mentioned publication, Japanese Unexamined Patent Publication No. 62-274207 discloses that one side of the measurement interval is illuminated by a light source from the side far from the measurement interval, and is partially illuminated by a light shielding piece. A measuring device is described in which a scattering glass plate is provided which is covered with a cross-section of the running thread, and a photoelectric element is provided on the other side of the measuring interval, the output signal of which represents the cross-sectional area of the running thread. ing.

Furthermore, Japanese Patent Application Laid-Open No. 63-71613 discloses that at least three
A device for measuring the diameter of a rotating body is described, which is equipped with two distance measuring devices.

Furthermore, Japanese Patent Application Laid-Open No. 63-8322 describes an optical fiber drawing apparatus having a rotation mechanism for measuring the outer diameter of an optical fiber being drawn from a plurality of directions.

[Problems to be Solved by the Invention] However, the cross-sectional area and cross-sectional shape of hair are different between the hair root side and the hair tip side, and even the same hair has different outer diameter values depending on the measurement location. In addition, in the case of curly hair, the outer diameter value varies significantly depending on the measurement direction, and it is unclear what kind of shape change will occur due to the influence of chemicals.

Even if such hair is measured using the conventional 1A setting, which is assumed to have a perfectly circular shape as described above, accurate cross-sectional measurements cannot be made.

An object of the present invention is to provide a hair cross-sectional area measuring method and apparatus that solve this problem.

[ii! Means for Solving the Problems] In order to solve the above problems, a first hair cross-sectional area measuring method of the present invention includes: an outer diameter measuring step of measuring the outer diameter of hair of a predetermined length from different directions; The present invention is characterized in that it includes a cross-sectional area calculating step of calculating the area of an ellipse whose major axis and narrow diameter are a pair of outer diameters measured from directions perpendicular to each other in the outer diameter measuring step.

Further, the second hair cross-sectional area measuring method of the present invention includes an outer diameter measuring step of measuring the outer diameter of hair of a predetermined length from different directions at a plurality of locations at predetermined intervals along the length direction; a cross-sectional area calculating step of calculating the areas of a plurality of ellipses whose major and minor axes are a pair of outer diameters measured from directions orthogonal to each other in the outer diameter measuring step; and a plurality of ellipses calculated in the cross-sectional area calculating step and an average calculation step of calculating the average value of the areas of the ellipses.

Further, the first hair cross-sectional area measuring device of the present invention includes: a tension applying means for applying tension to the hair of a predetermined length; an outer diameter measuring means for optically measuring the outer diameter of the hair; a rotating means for rotating; a cross-sectional area calculating means for measuring the hair rotated by the rotating means from directions perpendicular to each other and calculating the area of an ellipse whose major axis and minor axis are the pair of measured outer diameters; It is equipped with

Further, the second hair cross-sectional area measuring device includes: a tension applying means for applying tension to the hair of a predetermined length; an outer diameter measuring means for optically measuring the outer diameter of the hair; and a rotation for rotating the hair. means for moving the outer diameter measuring means relative to the hair at predetermined intervals in the longitudinal direction of the hair; measuring the hair rotated by the rotating means from directions orthogonal to each other; cross-sectional area calculating means for calculating the areas of a plurality of ellipses whose major and minor axes are a pair of outer diameters; and an average value calculating means for calculating the average value of the areas of the plurality of ellipses calculated by the cross-sectional area calculating means. and means.

Further, the third hair cross-sectional area measuring device includes: a chemical tank that transmits light; a support mechanism that supports the hair so that a part of the hair hangs down in the chemical in the chemical tank; and an outside of the chemical tank. , an outer diameter measuring means for optically measuring the outer diameter of hair in a chemical from a predetermined measurement direction; and rotating the support ** about a central axis along the longitudinal direction of the hair to measure the outer diameter of the hair. a rotation means for changing the direction; and a cross-sectional area calculation for measuring the hair rotated by the rotation means from directions orthogonal to each other and calculating the area of an ellipse whose major axis and minor axis are the pair of measured outer diameters, respectively. and means.

A fourth hair cross-sectional area measuring device includes: a chemical tank that transmits light; a support mechanism that supports the hair so that a part of the hair hangs down in the chemical in the chemical tank; an outer diameter measuring means for optically measuring the outer diameter of hair in a chemical from a predetermined measurement direction; and rotating the support mechanism about a central axis along the longitudinal direction of the hair to determine the outer diameter measurement direction with respect to the hair. a rotation means for changing the hair; and a cross-sectional area calculation for measuring the hair rotated by the rotation means from directions orthogonal to each other and calculating the areas of a plurality of ellipses whose major axis and minor axis are the pair of measured outer diameters, respectively. and an average value calculation means for calculating an average value of the areas of the plurality of ellipses calculated by the cross-sectional area calculation means.

[Operation] Therefore, according to the hair cross-sectional area measuring method and apparatus of the present invention, the cross-sectional shape of hair that is not a perfect circle is measured by approximating it to an ellipse, so that the actual cross-sectional area of hair can be measured more accurately. .

[Example] Below is an example of the hair cross-sectional area measuring device of the present invention.
I will explain.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the hair cross-sectional area measuring device, and FIG. 2 is a schematic perspective view showing the main parts thereof. In these figures, 1 indicates the tension that applies tension to the hair M. 2' is an outer diameter measuring means for optically measuring the outer diameter of the hair M; 3 is a rotating means for relatively rotating the hair M and the outer diameter measuring means 2; 4 is a means for measuring the outer diameter from a plurality of directions. It is a cross-sectional area calculation means for calculating the cross-sectional area of the hair M based on the outer diameter of the hair M, and the hair cross-section of this embodiment! i! The i-measuring device is such that the rotating means 3 rotates the hair M.

To explain each of the above components in detail, the tension applying means 1 includes an upper holding member 11 supported by a lower support plate 53a of a support plate 53, which will be described later, via a rotary head 31, which will be described later;
and a lower holding member 12 that holds the other end of the hair M held by the upper holding member 11 via the hair M, and the upper holding member 11 is inserted into the interior through the insertion hole 11a, as shown in FIG. The hair M is held in such a way that one end of the hair M is held between an inner wall and a holding body 11c which is biased toward the insertion hole 11a by a spring 11b. Further, the lower holding member 12 has the same configuration as one upper holding member, and is configured to hold the other end of the hair M suspended in the chemical tank 6, which will be described later.
2 is blank so that it functions as a weight for applying tension to the hair M. Therefore, the hair M is measured by the measurement base 5 which will be described later.
It will be held in a state where tension is applied perpendicularly to the upper surface 51 of.

Further, the outer diameter measuring means 2 is configured to be raised and lowered by a lifting device 21 provided on a side surface 52a of an upright substrate 52, which will be described later. The light emitting/receiving device WI22 and the light emitting/receiving device 2
As shown in FIG. A slit-shaped light projecting section 23 is housed therein, which emits a laser beam that is scanned by a vibrating mirror (not shown).

Further, inside the light receiving window 22b side, a light receiving section 24 is provided which receives incident light and outputs a received light signal. Note that a laser outer diameter measuring machine M551A manufactured by Anritsu Corporation can be used as the light emitting/receiving light [1f22].
The light emitting/receiving device WI22 is fixedly installed on the elevating device 21 so that the scanning beam emitted from the light emitting portion 23 to the light receiving portion 24 is parallel to the upper surface 51 of the measurement base 5. Therefore, the outer diameter measuring means 2 sweeps and outputs the light from the light projecting part 23 toward the light receiving part 24, and the light receiving part 24 outputs an edge detection signal every time this light passes through the edge of the hair M. The outer diameter value of the hair M is measured by calculating the outer diameter value of the hair M with the outer diameter calculation device 25 based on the output signal.

The rotating means 3 is rotatably supported by a lower support plate 53a, which will be described later, and includes a rotating hend 31 having a cross-sectional shape as shown in FIG. 3, and a step motor 32 supported by an upper support plate 53b, which will be described later. and a transmission belt 33 that transmits the drive of the step motor 32 to the rotary head 31, and a mounting hole 31a is formed in the center of the rotary head 31 concentrically with the center of rotation. The member 11 is supported so that the rotation of the rotary head 31 rotates the bristles 91M through the upper holding member 11.

Further, the cross-sectional area calculation means 4 controls the elevation control device 171 that controls the drive of the elevator M21 and the motor control I device f72 that controls the drive of the step motor 32 based on preset measurement conditions, initial positions, etc. It is configured to transmit a signal, calculate the cross-sectional area of the hair M based on the outer diameter value of the hair M outputted from the outer diameter calculation device 25, and display the calculation result, and is composed of a personal computer. ing. That is, the movement control means 41 commands the movement conditions to the elevation control device 71 and the motor control device 72 based on the set measurement start position, the angle pitch φ, the length pitch p, and the number of measurement cross sections N; Outer diameter value storage means 42 stores the outer diameter value of the hair M that has been applied, and a pair of outer diameters measured from directions orthogonal to each other on the same plane from the outer diameter values stored in the outer diameter value storage means 42. an ellipse area calculation means 43 that calculates the area of an ellipse whose major axis and minor axis are values, and averages the ellipse area for each measurement cross section; and a cross-sectional area for each measurement cross section calculated by the ellipse area calculation means 43. an average value calculating means 44 for averaging the number N of measured cross sections;
A display device 45 displays the result calculated by the average value calculation means 44 as a cross-sectional area of the hair M, and the display device 45 displays other data, such as the outer diameter value of the hair M or the cross-sectional area of each measured cross section. It is configured to include a display switching means 46 for.

Further, an upright substrate 52 is provided at the end of the upper surface 51 of the measurement base 5.
is erected in an upright direction, and a support plate 53 is fixedly installed parallel to the upper surface 51 of the measurement base 5 from the upper end of the upright substrate 52 toward the upper side of the chemical tank 6. The support plate 53 rotates. It includes a lower support plate 53a that supports the head 31 and an upper support plate 53b that supports the step motor 32.

Further, the chemical tank 6 is a rectangular cylindrical body with an open top, made of a transparent material that can transmit laser light, and is placed approximately in the center of the upper surface 51 of the measurement base 5.

Next, an embodiment of the hair cross-sectional area measuring method of the present invention using the above-mentioned hair cross-sectional area measuring device will be described with reference to a flowchart of the processing procedure of the cross-sectional area calculating means 4 shown in FIG.

First, the hair M is set in the tension applying means 1 so that a tension perpendicular to the upper surface 51 of the measurement base 5 is applied to the hair M, and the lower part of the hair M is submerged in the liquid chemical poured into the chemical tank 6. .

With the hair M set on the tension applying means 1, select the measurement start position II from the keyboard (not shown) of the cross-sectional area calculating means 4.
Input L, angle pitch φ, length pitch p, and number N of cross sections to be measured. For example, if the measurement start position lL = 20 mm, the angular pitch φ = 10'', the length pitch p = 5r?+m, and the number of measurement cross sections N = 10, then the movement 11i1JIl] means 41
An initial positioning command is output to the lifting control device 71 via the lifting device 21, and the light emitting/receiving device 22 is raised by 20 mm from the origin of the measuring device as shown in FIG. 6, and the light emitting/receiving device 22 is initially positioned. (Steps 1-3).

Note that since the step motor 32 is at its initial position, there is no need for initial positioning.

When initial positioning is completed, the completed state (current position)
The position of the light emitting/receiving device 811F22 and the step motor 32 is the measurement origin coordinate, that is, the position of the emission window 22a of the light emitting/receiving device 22 is the measurement origin of the Y coordinate YO=0, and the step motor 3
The rotational position of No. 2 is initialized as the measurement origin θo-0 of the θ coordinate (steps 4 and 5).

When the positions of the light emitting/receiving device 22 and the step motor 32 are initialized, the outer diameter value D(Y, θ) of the hair M at each coordinate (Y, θ) is emitted and received from multiple directions including mutually orthogonal directions. It is measured (calculated) by the device 22 and the outer diameter calculation device 25 as follows (outer diameter measurement step).

First, while the rotating means 3 is stopped, that is, the θ coordinate is maintained at the measurement origin θo = 0, the elevating device 21 moves the optical receiver @ 22 at a preset pitch p = 5 mm in the Y coordinate direction. The preset number of measurement sections N = 1
The outer diameter value of the hair M for each measurement cross section of 10 @ including the measurement origin Ya=O of the Y coordinate where the θ coordinate is θo = 01C is determined by the light emitting/receiving device. 2
calculated by the outer diameter calculation device W125 based on the edge detection signal output from the light receiving unit 24 of No. 2, and each calculated outer diameter value is stored in the outer diameter value storage means 42 (steps 7 to 9); .

When the calculation and storage of the outer diameter value of the hair M for each of N (10) measurement sections when the θ coordinate is 00=0 is completed, the elevating device 21 moves the light emitting and receiving device 22 to the measurement origin Yo of the Y coordinate.
As it is lowered to =O.

After the step motor 32 operates the number of steps required to rotate the hair M at a preset angle pitch φ=10°, the θ coordinate is set to θ=10 in the same manner as in steps 7 to 9.
The outer diameter value of the hair M is calculated for each of the 10 cross sections including the measurement origin Y0=0 of the Y coordinate at °, and the outer diameter value storage means 42
The respective outer diameter values are stored in (steps 10 to 12)
).

As described above, for a total of 180 outer diameter values, that is, 10 measurement sections in the Y coordinate direction, 180°/10'' (set value of angular pitch θ) = 18 in the θ coordinate direction, respectively.
The outer diameter value D (Olo) ~ D (45,1
70) is calculated by the outer diameter brightening device 25 based on the edge detection signal output from the light receiving section 24 of the light projecting and receiving device 22.

When each calculated outer diameter value is stored in the outer diameter value storage means 42, a pair of outer diameter values measured from directions orthogonal to each other, as shown in FIG. Da(i”l), m・φ), Db<i−p, m・
The areas (π・Da−Db/4) of nine pairs of ellipses whose major and minor axes are φ+90) are calculated (cross-sectional area calculation step), and the average value of the areas of the nine pairs of ellipses calculated is 5(1 ) is calculated by the ellipse area calculation means 43 for each measurement cross section (average value calculation step) (steps 13 to 14).

Therefore, the cross-sectional area of each measured cross-section is the average value of the areas of the nine sets of ellipses, and a value extremely close to the true cross-sectional area of the hair can be obtained.

The cross-sectional areas 5(0) to 5(9) for each measurement cross-section shown in FIG. 8 calculated as described above were further averaged by the average value calculation means 44, and the average value S was measured. This is calculated as the cross-sectional area of the hair M (steps 15 to 17).

By performing the above processing procedure at predetermined time intervals depending on the conditions of the chemicals used, etc., it is possible to accurately know the influence of the chemicals on the outer diameter value and cross-sectional area of each type of hair M.

An embodiment of the hair cross-sectional area measuring device of the present invention and an embodiment of the cross-sectional area measuring method of the present invention have been described above.
The invention is not limited to these examples and embodiments. For example, the light emitting and receiving device 22 may be rotated without rotating the hair M. Also, a light receiving device! 22 may be fixedly installed and the support plate 53 may be moved up and down.

In addition, when simply measuring the cross-sectional area of hair M,
It is not necessary to provide the chemical tank 6. In addition, the order in which the outer diameter value of hair M is measured is 1 in the θ coordinate direction in one measurement cross section.
After calculating the eight outer diameter values, length pitch p in the Y coordinate direction
The same calculation may be made for the measurement cross section shifted by =5 mm.

[Effects of the Invention] The hair cross-sectional area measuring method and device of the present invention have the following advantages: (1) The cross-sectional area of the hair can be calculated from the area of an ellipse whose major axis and minor axis are a pair of outer diameters measured from directions perpendicular to each other. Since the calculation is performed, it is possible to more accurately measure the cross-sectional area of the hair, which is expected to undergo various deformations.

(2) Furthermore, since the area of this ellipse is averaged in different directions and in the longitudinal direction of the hair, it is possible to measure the cross-sectional area as accurately as -.

(3) Furthermore, by applying tension to the hair, it is possible to eliminate differences in measurement due to hair habits.

(4) Furthermore, the cross-sectional area of hair in chemicals can be easily measured.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the hair cross-sectional area measuring device of the present invention, FIG. 2 is a schematic perspective view showing the main parts thereof, and FIG. 3 is a main part of the upper holding member and the rotating head. 4 is a perspective view showing the structure of the light emitting and receiving device, FIG. 5 is a flowchart showing the processing procedure of the cross-sectional area calculating means, and FIG. 6 is a diagram showing the hair cross-sectional area measuring method of the present invention. Perspective view for explaining initial positioning in one embodiment, seventh
This figure and FIG. 8 are diagrams for explaining the method of calculating the cross-sectional area. 1...Tension applying means, 2...Outer diameter measuring means, 3...Rotating means, 4...Cross-sectional area calculating means, M... ··hair.

Claims (6)

[Claims] (1) An outer diameter measuring step in which the outer diameter of hair of a predetermined length is measured from different directions, and a pair of outer diameters measured from directions orthogonal to each other in the outer diameter measuring step are defined as the major axis and the minor axis, respectively. A method for measuring a hair cross-sectional area, comprising the step of calculating a cross-sectional area by calculating the area of an ellipse. (2) an outer diameter measuring step of measuring the outer diameter of hair of a predetermined length from different directions at predetermined intervals along the length; and measuring from directions orthogonal to each other in the outer diameter measuring step. a cross-sectional area calculation step of calculating the areas of a plurality of ellipses whose major and minor axes are the pair of outer diameters, and an average calculation of calculating the average value of the areas of the plurality of ellipses calculated in the cross-sectional area calculation step. A method for measuring a hair cross-sectional area, comprising the steps of: (3) tension applying means for applying tension to hair of a predetermined length; outer diameter measuring means for optically measuring the outer diameter of the hair; rotating means for rotating the hair; A hair cross-sectional area measuring device comprising: a cross-sectional area calculation means for measuring the hair from directions orthogonal to each other and calculating the area of an ellipse whose major axis and minor axis are the pair of measured outer diameters. (4) tension applying means for applying tension to the hair of a predetermined length; outer diameter measuring means for optically measuring the outer diameter of the hair; rotation means for rotating the hair; A moving means for relatively moving an outer diameter measuring means at predetermined intervals in the longitudinal direction of the hair, and a moving means for measuring the hair rotated by the rotating means from directions perpendicular to each other, and each of the pair of measured outer diameters is defined as a major axis. Hair cross-sectional area measurement, comprising: cross-sectional area calculating means for calculating the area of a plurality of ellipses having minor axes; and average value calculating means for calculating the average value of the areas of the plurality of ellipses calculated by the cross-sectional area calculating means. Device. (5) A chemical tank that transmits light; a support mechanism that supports the hair so that a part of the hair hangs down in the chemical in the chemical tank; and an outer diameter of the hair in the chemical from outside the chemical tank an outer diameter measuring means for optically measuring from a predetermined measurement direction; a rotating means for rotating the support mechanism about a central axis along the longitudinal direction of the hair to change the outer diameter measuring direction with respect to the hair; A hair cross-sectional area measuring device comprising a cross-sectional area calculating means for measuring the hair rotated by the means from directions orthogonal to each other and calculating the area of an ellipse whose major axis and minor axis are the pair of measured outer diameters, respectively. . (6) a chemical tank that transmits light; a support mechanism that supports the hair so that part of it hangs down in the chemical in the chemical tank; and an outer diameter of the hair in the chemical from outside the chemical tank. an outer diameter measuring means for optically measuring from a predetermined measurement direction; a rotating means for rotating the support mechanism about a central axis along the longitudinal direction of the hair to change the outer diameter measuring direction with respect to the hair; a cross-sectional area calculating means for measuring the hair rotated by the means from directions orthogonal to each other and calculating areas of a plurality of ellipses whose major axis and minor axis are the pair of measured outer diameters; and the cross-sectional area calculating means. A hair cross-sectional area measuring device, comprising: an average value calculating means for calculating an average value of the areas of a plurality of ellipses calculated in the step.