JPH01185421A - Method for detecting color of color bobbin - Google Patents

Abstract

PURPOSE:To accurately discriminate the color of a color bobbin, by receiving the reflected light from the color bobbin by a photodetector and extracting the red, blue and green hue components of the color of the color bobbin. CONSTITUTION:When a color bobbin is shaken or inclined, the quantity of the reflected light from the bobbin received by photodetectors 9a-9c changes and the magnitude of red, blue and green hue components increases or decreases by the effect of said change. However, the magnitude of the brightness component being the sum of the red, blue and green hue components also changes accordingly depending on the quantity of the reflected light from the bobbin received by the photodetectors 9a-9c. That is, each of the hue components and the brightness component are analogue signals similarly increasing and decreasing each other. Therefore, the red, blue and green hue components are respectively passed through dividers 12-14 to be divided by the brightness component and, when the ratio of both of them is calculated, said ratio becomes a certain definite value and, therefore, as the output of each of the dividers, a stable hue component detection signal from which the undulation due to the shaking of the bobbin is removed is obtained. When this signal is on a definite level or more, the signals relating to the presence of the hue components are outputted from comparators 15-17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for detecting the color of a color bobbin useful for automatic winemaking and the like.

[Prior Art] A tube yarn, which is obtained by winding a yarn spun by a spinning machine, is generally rewound into a package having a thickness and shape suitable for removing yarn defects or for subsequent processes. The automatic wine goo used for this winding process consists of multiple winding units with multiple spindles installed in parallel, and the thread that is drawn out at high speed from the pipe thread supplied to each unit is rotated by a drive drum. When one thread of the pipe thread is used up, the next pipe thread is newly supplied, the thread is tied, and the winding is performed again.

In this way, a plurality of tubes are fed to obtain - full packages. Therefore, the spinning unit of the spinning machine should be set at 50 to 60 f for the winding unit of the wine goo.
If it is compatible with i, the spinning process and the rewinding process will operate efficiently as a whole.

Therefore, in Japanese Patent Application Laid-Open No. 59-17464, a wine goo having a large number of two winding units is substantially divided into a plurality of sections, and one section is provided with a kind of pipe yarn produced by a spinning machine. A type of pipe yarn produced by another spinning machine is supplied to another section, and each section and the spinning machine are provided with a pipe yarn supply path and an empty bobbin return path, An automatic thread transport system with a closed loop configuration is disclosed.

In such systems, it is important to ensure that different types of tube yarns are not fed to the same winding unit. This is because if yarns of different types are supplied by mistake, yarns of different types will be mixed in the wound package, and this can no longer be checked by visual inspection, so doffing is not possible. This is because all packages that have been removed are defective, and if they are not removed as defective, it will have an adverse effect on the subsequent knitting process.

Regarding this point, we focused on the tray that circulates between the spinning machine and the winder to convey the tube yarn, and attached an identification mark on the outer peripheral surface of the base body to indicate the type of tube yarn. In addition to identifying the spinning machine that produced the spinning frame, on the entry side of the branch path between the main supply path and the winding section, and on the entry side of the branch return path between the return path and the spinning machine,
It is known to provide a sensor that reads the E identification mark and a pipe selector that controls the introduction into the branching path (Japanese Utility Model Publication No. 18604/1983).

[Problems to be Solved by the Invention] However, by simply reading the identification mark on the tray as in the above method, it is not possible to detect a case where the bobbin is incorrectly combined with the tray in the winding section. There is a problem in that another yarn type is wound in the winding section.

Normally, it is difficult to visually distinguish between different yarn counts, so the bobbins of the tube yarn are colored, and bobbins of different colors are used depending on the yarn type such as the yarn count. This prevents number confusion. Therefore, by identifying the color of the color bobbin, it is possible to monitor and remove erroneously supplied yarns, and to prevent yarns of different types from mixing in the package.

However, the color bobbin of the tube thread that is inserted onto the tray is covered with a layer of yarn wound around it, and the area that should be detected is the area that is slightly left above the tube yarn. Only. Furthermore, since the yarn is conveyed just by being inserted into the tray, the detection area at the top of the yarn fluctuates, and the magnitude of the color detection signal also fluctuates, making it difficult to accurately identify the color of the color bobbin. cannot be done.

The present invention aims to solve the above-mentioned problems, and provides a color bobbin color detection method that can accurately identify the color of a color bobbin, which is important in preventing mix-up. There is a particular thing.

[Means for Solving the Problems] A method for detecting the color of a color bobbin according to the present invention receives reflected light from the color bobbin with a light receiving element, and detects red, which is the color of the color bobbin.
In addition to extracting the blue and @ hue components, a luminance component is created from the sum of these red, blue, and green hue components, and the red, blue, and green hue components are input to their respective dividers to calculate the luminance. The red, blue, and green hue components obtained from each divider are input to each comparator, and if they are above a certain level, the color is red.

This outputs blue and green color information signals.

[Function] When the color bobbin shakes or tilts, the amount of reflected light from the color bobbin that is received by the light receiving element changes, and as a result, the magnitudes of the red, blue, and green hue components increase or decrease. However, the magnitude of the luminance component, which is the sum of these red, blue, and green hue components, also changes depending on the amount of reflected light from the color bobbin that is received by the light receiving element. In other words, each hue component and luminance component are analog signals that increase and decrease in a similar manner to each other.

Therefore, by passing the red, blue, and green hue components through a divider and dividing them by the luminance component, and taking the ratio of the two, a constant value is obtained.The output of each divider is the color bobbin. A stable hue component detection signal from which waviness caused by shaking has been removed can be obtained. If the detection signal of each hue component is above a certain level, each comparator outputs a color information signal indicating the presence or absence of the red, blue, and green hue components.

〔Example] The present invention will be described below based on illustrated embodiments.

In Figure 1, 1 is a tube yarn wound around a pobbin 2, 3
is a tray for inserting the lower end surface of the pipe yarn l and conveying it to the winder in an upright state.

Reference numeral 4 denotes a tray sensor for identifying the type of the tray 3 and, in turn, the type of the tube yarn l, and specifically, it is composed of a plurality of iron rings 6a and 6b provided on the circumferential surface of the disc-shaped base 5 of the tray 3. It consists of proximity switches 7a and 7b that detect identification marks. IO is a pobbin color sensor for identifying the type of color of the pobbin 2 and the count of the tube yarn 1, etc. Specifically, it is a light projector 8 that irradiates light onto the upper peripheral surface of the pobbin 2, and its reflected light. It consists of a light receiver 9 that receives the light, and an electric circuit section that receives the signal from the light receiver 9 and identifies the pobin.

In FIG. 2, the light receiver 9 has three light receiving elements 9a and 9b.
, 9c are arranged on a plane. The reflected light from the color pobin 2 is separated into the three primary colors of red, blue, and green by the light receiving elements 9a, 9b, and 9c.
From 9b and 9c, red, blue,
Green hue components Ro, Bo, and Go are extracted. In addition, the hue components of these three primary colors Ro, Bo, Go
A brightness component So is extracted from the adder 11 as the sum of . These hue components Ro, Bo, Go and luminance component So are all analog signals.

The red, blue, and green hue components Ro, Bo, and Go are further input to the respective dividers 12, 13.14 through amplifiers. The luminance component SO from the adder 11 is added to the other input of each divider 12 to 14, and the red, blue, and green hue components Ro, Bo, and Go are divided by the luminance component So. be done.

The magnitudes of the red, blue, and green hue components Ro, Bo, and Go, and the luminance component So that is the sum of these components, depend on the amount of reflected light from the color pobin 2 that is received by the light receiving elements 9a, 9b, and 9c. These are analog signals that increase and decrease in a similar manner to each other. Therefore, red, blue, and green hue components R
, o, Bo, G.

The ratio between the two, obtained by dividing each by the luminance component So, becomes a constant value. Therefore, even if the color pobbin 2 shakes or tilts, stable hue component detection signals R1, Bl, and Gl are obtained as the outputs of the dividers 12 to 14, from which the waviness caused by the shake is removed. It will be done.

These red, blue, #& hue component detection signals R1, Bl, G
1 are all analog signals, and are input to independent comparators 15, 16, and 17, respectively.

Each comparator 15-17 receives these input signals R1, Bl
, Gl are compared with predetermined values set by level setters 150, 160, and 170, respectively, and
, Gl is larger than the set value, the color information signals R9B and G with "color component present" are output at H level.
Comparators 15, 16, and 17 include inverters 151 and 161.
゜171 is connected, and each inverter 151 to 171
, color information signals u, fi, and a without color components, which are the inverted color information signals R, B, and G, are output.

The reason why the color information signals R, B, and G "with color components" for the red, blue, and green hue components are output is when the color of the color pobin 2 has a reddish or bluish tinge more than the set value.

This is when the color has a greenish tinge, and the color information signal Tf<, 'Ts, ?5 with "no color component" is output when each of the red, blue, green, and luminance components is the corresponding one. This is a case where the color information signals are not included up to a certain level in the package of the color pobin 2. The rise of the output of one of the color information signals R, B, and G with "color components present" is the color information signal with "no color components". u, fi, 5
It can be used as an identification timing to detect.

20, when identifying whether the color of the color pobbin 2, that is, the type of tube thread, is correct for the wine goo unit, the above-mentioned three systems of red, blue, and green, a total of six This is a color information selection circuit that determines which color information of the color information signals R, B, G, u, fi, and c should be selected or combined for determination processing. Reference numeral 21 denotes a total of six color information signals R and B in the above three systems in the color information extraction circuit 20.

It is a color system designation circuit that specifies the selection or combination of c, u, fi, and c, that is, the color system to be used for identification, and is an independent color system designation switch corresponding to the three systems of red, blue, and green. Designation signals r, b, and g designating "color components present" of red, blue, and green are taken out at H level from the 0 color system designation switch 22.23.24 provided with 22.23.24. Inverters 221, 231, and 241 are connected to the color system designation switches 22, 23, and 24, and the designation signals r and b are outputted from each inverter.

A designation signal 〒+'j1g that specifies "no color components" of red, blue, and green, which is an inversion of g, is output at H level.

Specifically, the color information discarding circuit 20 is an AND gate 20 which receives two inputs: the red color information signal R from the comparator 15 and the red designation signal r from the color system designation switch 22.
1, an AND gate 202 which receives two inputs: the blue color information signal B from the comparator 16 and the blue designation signal from the color system designation switch 23, and the green color information signal G from the comparator 17. and an AND gate 203 which receives two inputs: and a green designation signal g from the color system designation switch 24.

These AND gates 201 to 204 are opened by designation signals r, b, and H from color system designation switches 22 to 24, and each comparator 15 to 17 detects each red, blue, and green component, and the "color" When color information signals R, B, and G with "components present" are output, these detected color information signals R, B, and G are passed.

Furthermore, the color information selection circuit 20 includes a color system designation switch 2.
AND gates 205 and 20 that are opened by designated signals 〒, b, and ' that become H level when 2 to 24 are not selected;
6,207 are provided, and each AND gate 205 to 20
7 allows color information signals m, m, and a with "no color components" to be passed when they are output.

Therefore, when one of the color system designation switches 22 to 24, for example, the color system designation switch 22, is turned on to designate red,
AND game) 201 belonging to the designated red system is opened by the designated signal r. At this time, the designation signal 〒 remains at the L level, so the AND gate 205 is in a closed state. For the remaining color system designation switches 23 and 24 that were not turned on, the AND gate 202
．． 203 is closed, and AND gates 206 and 207 are opened by the designated signal t.

That is, six color information signals of three systems R, B, G, )l.

Among n and d, three color information signals R and 13°d of three systems are extracted. This is due to the fact that the color system designation circuit 21 specifies a "red system" color, which has a red hue and no blue, I& color information, as a color for identifying the color pobin 2 to be inspected. . Increase the number of color system designation switches 22 to be operated, for example, increase the number of color system designation switches 22
and 23 are turned on to specify red and blue, three color information signals R, B, and 5 of three systems are extracted, and a "purple system" that has red and blue hues and no green color information is extracted. ” color can be specified. Similarly, various color systems can be specified.

Reference numeral 26 designates a color information exclusion designation circuit for eliminating the color information signal of the color system that is not desired to be used among the three color information signals of the three systems taken out from the color information removal circuit 20 in this way. For example, three color information signals of three systems taken out from the color information removal circuit 20 are provided with independent manual exclusion switches 27, 28, and 29 for each of the blue and green systems. 5, when the exclusion switches 28 and 29 are turned on, the two color information signals n and d of blue and green are removed and ignored from the judgment elements, and the red color is removed for the exclusion switches 27 that were not turned on. Only the information signal R remains as a valid processed signal, and it is possible to specify a pure "red family" color, that is, whether or not it has a red hue.

Reference numeral 30 denotes a judgment circuit for determining whether or not the color pobin 2 is of the correct color, and it detects the three systems of color information signals taken out from the color information removal circuit 20 or the two that have been further removed by the color information removal designation circuit. ~1 system of color information signals is received as the color information to be finally judged, and based on these 3 to 1 systems of color information signals, the color pobin 2 is
identify whether it is of the correct color or not. Specifically, this judgment circuit 30 consists of a three-man power AND gate 300 having input terminals for each of the red, blue, and green systems, and OR gates 301, 302, and 303 placed in front of each of the input terminals. . The outputs of the AND game) 201 and 205 and the exclusion switch 27 are connected to the OR gate 301 of the red system. Similarly, the outputs of the AND gates 202 and 206 and the exclusion switch 28 are sent to the blue OR gate 302.
The outputs of the ND gates 203, 207 and the exclusion switch 29 are connected to the OR gate 303 of the green system.

Next, the operation will be explained.

For convenience of explanation, Color Pobbin 2 has two colors: "red" and "purple".
Seeds are used, number 14 for red bobbins and number 1 for purple bobbins.
It is assumed that a number 6 thread is wound thereon, and both color pobbins 2 are supplied to different wind mite knits. In such a case, in order to identify whether or not the color pobbin 2 is the correct color pobin for the wine mite knit, it is necessary to distinguish between the two colors of the color pobin 2, "red" and "purple". It becomes necessary. However, the problem here is that red and purple contain red as a common hue, so the method of identifying whether the two color pobins 2 are correct or not based on the presence or absence of the red color component does not allow accurate identification. It is impossible. Therefore, one of the color pobin 2's "
The color component of "blue" which is included in "purple" but not included in "red" of the other color pobin 2 is used as a measure for determining whether the color pobin 2 is correct or not.

First, regarding the first wine tick knit that handles the red bobbin (number 14 thread), it is detected that the "blue" color component is absent to a certain level, and therefore, the color information signal n is generated. is the criterion for determining whether it is a correct color pobbin. However, the output of the inverter 161 is at H level even if the color pobbin 2 has not yet reached the position of the bobbin color sensor 1O, and the color information signal n is generated, so it is necessary to judge whether the above conditions are satisfied or not at an appropriate time. A second condition is required as identification timing. In order to satisfy this second condition, it is sufficient to detect that the color pobbin 2 has come to the position of the bobbin color sensor 10 using a separately provided position sensor.

Therefore, by keeping the blue color system designation switch 23 in the OFF state, the AND gate 20
6 and specify the color information signal n indicating that there is no blue color component. Then, the red system rejection switch 27 and the green system rejection switch 29 of the color information rejection designation circuit 26 are turned ON, and the input terminals of the red and green systems in the three-man power AND gate 300 of the determination circuit 30 are kept at the H level. The red color information signals R and l (and the green color information signal G.

Remove d from the judgment factor.

By setting in this way, the A of the determination circuit 30
The output terminal of the ND gate 300 becomes H level only when the color information signal S and the color information signal are input at the same time, that is, only when the red bobbin on which the 14th thread is wound arrives.

Therefore, the H level output of the AND gate 300 can be treated as a detection signal indicating that the color of the color pobbin 2 is correct. If a purple bobbin with the 16th thread wound thereon comes by mistake, the comparator 13 outputs a blue color information signal B, and its inverted signal is a color information signal n.
disappears, so the logic of AND gate 300 no longer holds true, and the output of AND gate 300 becomes L level.

Therefore, the L level output of the AND gate 300 can be treated as a discharge signal for removing the color pobbin 2 from the conveyance system.

Next, t52, which carries 16th thread (purple bobbin)
Regarding the wine tick knit, the condition for determining that it is a correct color pobbin is that the presence of the "blue" color component up to a certain level is detected, that is, that the color information signal B is generated. The second condition regarding the identification timing dealt with in the first wind mite knit above, that is, the condition that the color pobbin 2 is at the position of the bobbin color sensor 10, is not necessarily necessary as a condition for determining that it is a correct color pobbin. However, it is necessary to judge that it is not the correct color pobin.

Therefore, regarding the second wine tick knit, first, turn on the blue color system designation switch 23, open the AND gate 202 with the designation signal, and designate the color information signal B indicating that there is a blue color component. . In addition, the color information exclusion designation circuit 26
Turn on the exclusion switch 27 and 29 of the judgment circuit 30.
The inputs of the red and green systems are always held at H level, and the color information signals R, R, G, and G of the red and green systems are removed from the judgment factors.

By setting in this way, the A of the determination circuit 30
In the ND game) 300, its output terminal becomes H level only when the color information signals S and B are input at the same time, that is, only when the purple bobbin on which the 16th thread is wound arrives.

If the 14th red bobbin comes by mistake, the blue color information signal B will disappear in the comparator 13, so the AND
The output of gate 300 becomes L level. Therefore, AND
When the output of the gate 300 is H level, it is the correct 16th purple bobbin, so it is passed through. On the other hand, when it is L level, it is the 14th red bobbin that was sent by mistake, so it is passed. It can be discharged from the conveyance system.

The above example uses red and purple bobbins, but the method for identifying color bobbins of arbitrary colors that have the same hue components is the same. By using a color component that is not common and easy to identify as the identification color, it is possible to distinguish and detect both color bobbins without error.

3 to 5 show an example in which the bobbin color sensor 10 is applied to an automatic thread conveyance system.

In Fig. 3, different types of yarn are produced in spinning frames 5PI-SF3, the yarn in spinning frame SPI is rewound in winding section S01, and the yarn in spinning frame SP2 is rewound in winding section SC2. One winding section corresponds to each spinning frame. MF is a pipe supply path, which is composed of a main supply path F1 from each spinning machine and branch supply paths f1 to f4 to winding sections 5CI-3C4 of the winder. MR is a return path for an empty bobbin or a bobbin with remaining thread, and is a common return path R from the winding section 5CI-3C4.
and branch return paths rl to r4 to each spinning machine.

A guide device ACF for taking out the yarn end of the pipe yarn l is arranged at one location of the main supply path Fl, and a pipe selector 41, 42 is provided at each winding section position of the main supply path F1.
．． 43 is arranged, and a tray sensor 4 and a bobbin color sensor 10 are respectively arranged near the upstream side thereof. - On the other hand, a path R1 for supplying the bobbin with residual yarn to the feeder ACF is connected to the return path R via a selector 44, and a separate extremely small residual thread removing device ST is connected to the return path R to remove the residual yarn of the bobbin with extremely small residual thread. It is located.

45 is a sensor for detecting a bobbin with remaining thread, and 46 is a sensor for detecting a bobbin with very little remaining thread. Furthermore, a tray sensor 4 and a tray selector 47 are installed at each spinning machine position on the return path R.
is located.

The tube yarns 1 obtained from each spinning machine SPI to SP4 are wound around color bobbins 2 of different colors according to the yarn counts, and are mounted on trays 3 with different marks for each yarn type.
The yarns are grouped by yarn type or randomly transferred to the main supply path MF regardless of the yarn type.

The pipe thread 1 being transferred in the direction of arrow 40 is transferred to the outlet device aAcF.
The thread l, which has been picked up sequentially and is transferred on the main supply path Fl with the thread end hanging down to the center hole of the bobbin 2 as shown in FIG.
The picked-up pipe yarn l, which is again supplied to the pick-up device ACF, is transported on the main supply path Fl toward the winder W, and passes through the tray sensor 4 and bobbin collar sensor 10 located at the position of the pipe yarn selector 41. pass.

The tray sensor 4 identifies the identification mark on the tray 3, and at the same time, the bobbin color sensor 1O identifies the color of the color bobbin 2 attached to this tray 3. The bobbin color detection by the bobbin color sensor 10 inspects the tip of the swinging color bobbin 2, but due to the function of the dividers 12 to 14, the detection error caused by the swing is removed and no malfunction occurs. As a result of color detection at 0 m, if the yarn is from the spinning machine SPI, an activation command is given to the yarn selector 41, the gate 48 shown in FIG. 4 is turned from the solid line position to the broken line position 49, and the tube is The yarn 1 is transferred onto the branch supply path fl and supplied to the tube yarn delivery path 50 of the winding section SCI.

Similarly, regarding the pipe yarns of spinning machines SP2 to SP4,
For example, for the spinning machine SP4, the yarn is detected by the tray sensor 4 and bobbin color sensor 10 of the corresponding winding sections SC2 to SC4, and is supplied to the yarn delivery path 50 of each winding section. selector 41,
It passes through the tray sensor 4 and the bobbin color sensor lO belonging to sections 42 and 43 one after another, and is supplied from the branch supply path f4 of the winding section SC4 to its delivery path 50h.

In this way, the pipe yarn is supplied to the winding section corresponding to each spinning machine, and within each section, the fourth
The disk 53 is inserted into the yarn intake port 52 of each unit 51 shown in the figure.
The pipe is taken into the upper waiting groove 54, and in the state shown in FIG. 5, that is, in the state where it is mounted on the tray 3, a predetermined pipe yarn is supplied to the winding position and then wound back.

If the combination of the bobbin color of the tray 3 and the bobbin thread l is wrong, and therefore the identification result of the tray sensor 4 and the identification result of the bobbin color sensor 10 are different, each of the bobbin colors of the thread l The intake into the unit 51 is prohibited, and it is discharged from the main supply path F1 or the delivery path 50 to another discharge path. However, this inappropriate pipe yarn 1 can be removed by passing it through each unit 51 through the gate 48 of the pipe selector, the pipe delivery path 50, the pipe intake port 52, and into the common return path R. In this case, the return path R
It is also possible to provide a tray sensor 4 and a bobbin color sensor 10 in the middle of the return path H to detect an inappropriate combination again, and discharge the product from the middle of the return path H to another branch path. Although it is also possible to prevent rewinding from starting even if the unit 51 is loaded into each unit 51, it is preferable that each unit 51
It is preferable to increase the operating rate of 1.

In each unit/ ) 51, the tray 3 of empty bobbins that have been completely rewound or bobbins with remaining yarn that have been ejected because the yarn cannot be tied is transported on a common return path R. At this time, the type of tray 3 transferred and therefore the color of the color bobbin 2 are random.

The empty bobbin tray 3 with no residual yarn is transferred on the return path R, passes through the residual yarn removal device ST, and is returned to the spinning machine, where it is connected to the tray sensor 4 and the selector 47 operated by the sensor. Through the cooperation of the above, empty bobbins of a specific color are returned to predetermined spinning machines SP1 to SP4.

[Effects of the Invention] As described above, the method for detecting the color of a color bobbin according to the present invention passes the red, blue, and green hue components through a divider, divides them by the luminance component, and calculates the ratio of the two. Since the color bobbin is set to a constant value consisting of
Even if the amount of reflected light from the color bobbin that is received by the light receiving element changes, a stable detection signal of the hue component can be obtained from which waviness caused by shaking of the color bobbin is removed.

Therefore, there is a large degree of margin against shaking and tilting of the color bobbin, and stable color signal detection can be performed in the bobbin color sensor. Furthermore, even when the object to be detected has a curved surface, the detection accuracy does not deteriorate and there are effects such as being unaffected by variations in the amount of light from the light source.

Therefore, in a system in which an automatic wine goo is blindly connected to a spinning machine and winds a wide variety of yarns using a stand-alone wine goo, even when trays with various pipe threads inserted therein are conveyed randomly along a common conveyance path. , is particularly suitable as a color detection method for color bobbins for sorting out only a specific yarn and transferring it to a specific yarn processing section.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the detection position of the color bobbin sensor using the color detection method of the present invention and the tube thread inserted into the tray, and Fig. 2 shows the circuit configuration of the color bobbin sensor using the color detection method of the present invention. FIG. 3 is a layout diagram showing an example of a pipe yarn conveyance system to which a color pobbin sensor according to the color detection method of the present invention is applied, and FIG. 4 is a schematic plan view showing a conveyance path of the winding section of the system. , FIG. 5 is a perspective view showing the winding unit of the system. In the figure, 1 is a thread, 2 is a bobbin, 3 is a tray, 4 is a tray sensor, 8 is a light emitter, 9 is a light receiver, 9a, 9b, 9c are light receiving elements, 10 is a bobbin color sensor, 11 is an adder,
12, 13, and 14 are dividers, 15, 16, and 17 are comparators, 150, 160, and 170 are comparison setters, 20 is a color information extraction circuit, 21 is a color system designation circuit, and 22, 23, and 24 are colors. System designation switch 2,000, 26 is color information exclusion designation circuit, 2
7, 28, and 29 are exclusion switches, and 30 is a determination circuit. Patent applicant: Murata Machinery Co., Ltd. Representative patent attorney: Nobuo Kinutani Figure 1

Claims (1)

[Claims] 1. Receive the reflected light from the color bobbin with a light receiving element to extract red, blue, and green hue components of the color of the color bobbin, and create a luminance component from the sum of these red, blue, and green hue components, The above red, blue, and green hue components are input to each divider and divided by the above luminance component, and the red obtained from each divider is
A color detection method for a color bobbin, characterized in that blue and green hue components are input to respective comparators, and if the hue components are above a certain level, red, blue, and green color information signals are output.