JP3496026B2 - Color detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is incorporated in a bill validator and the like, and the amount of infrared light that passes through an object to be inspected, such as a banknote, and the amount of visible light, such as red light, that is determined by the color of the object. The present invention relates to a color detection device that detects the color of an object to be inspected based on the ratio of, and particularly to a color detection device that can reduce the adjustment process.

In the following drawings, the same reference numerals indicate the same or corresponding parts.

[0003]

2. Description of the Related Art FIG. 5 is a block diagram showing a structural example of a main part of a conventional color detecting device of this type incorporated in a bill validator. In the figure, 3 is an inspection object as a bill, 1 is a conveyance path for the inspection object 3, 2 is a conveyance mechanism that drives the conveyance belt 2a along the conveyance path 1 to convey the inspection object 3, and 14 is a conveyance belt. The tacho-generator is connected to the drive shaft of 2a and outputs a pulse every time the conveyor belt 2a, and thus the object 3 to be inspected, is conveyed by a predetermined amount (several mm / 10 in this example).

Reference numerals 4 and 5 respectively denote an infrared light LED and a red light LED, which are installed close to each other along the transport path 1, respectively. The infrared light and the red light are respectively transported to the respective LEDs of the inspection object 3 to be transported. Irradiate the part that comes to the installation position. Reference numeral 9 is a light receiving element composed of a photodiode or a phototransistor that receives the infrared light and the red light transmitted through the inspection object 3 based on this irradiation. Here, for convenience, this means 4,
5 and 9 are collectively called a color detection sensor. The principle of this color detection sensor is that spectral characteristics of the object to be inspected 3 with respect to infrared light and that of the object to be inspected 3 with respect to visible light (red light in this example) having a predetermined wavelength determined according to the color of the object to be inspected 3 The color of the inspection object 3 is detected by utilizing the difference from the spectral characteristic.

Next, 10 is an amplification section for amplifying the light reception signal of the light receiving element 9, 11 is an A / D conversion section for converting the analog output of the amplification section 10 into a digital value, and 8 is a drive for turning on / off the LEDs 4, 5. The LED lighting drive units 6 and 7 for performing the operations are variable resistors for adjusting the drive currents of the LEDs 4 and 5, respectively (therefore, the light amount and the brightness). Further, reference numeral 12 is a control unit composed of a microcomputer for controlling the entire bill validator, and here, a tacho generator 14 and an A / D conversion unit 11 are provided.
The transport mechanism 2 and the LED lighting drive unit 8 are controlled while inputting the output signal of. Reference numeral 13 is a RAM belonging to the control unit 12.

In the apparatus shown in FIG. 5, a reference blank sheet (that is, a blank sheet that has not been printed at all and is used as a reference) is inserted into the entrance of the transport path 1 instead of the object 3 to be inspected in advance in the adjustment step. Set to mode. Then, the control unit 12 conveys the reference white paper to the portion of the color detection sensor including the means 4, 5, 9 and also turns on the infrared light LED 4 and the red light LED 5 alternately at a predetermined cycle. Then, each time this light is turned on, the A / D conversion value corresponding to the amount of transmitted light of the LEDs 4 and 5 with respect to the reference white paper is input through the light receiving element 9, the amplification section 10, and the A / D conversion section 11 and output to the adjustment terminal (not shown). To do. An adjuster reads this output value via a CRT or the like, and the A / D conversion value as the detected transmitted light amount is the same predetermined value (in this example, 28).
As a _H), amount of light transmitted through LED4 and 5 in other words at the level 28 _H, 1: adjusting the variable resistor 6 and 7 to be 1.

FIG. 6 is a flow chart showing an operation of collecting color data of banknotes by the control unit 12, and S1 to S22 show the steps. Next, the operation of FIG. 6 will be described with reference to FIG. When the control unit 12 detects that the inspection object 3 is inserted into the conveyance path 1 via an entrance sensor (not shown), the control unit 12 starts conveying the inspection object 3 via the conveyance mechanism 2 and turns on the infrared light LED 4. Yes (S1). Next, a change (decrease) in the output level of the light receiving element 9 of a predetermined value or more is detected, and the inspection object 3
When it is determined that the tip of the tacho has reached the color detection sensor composed of the means of 4, 5, and 9 (S2), the value T of the tacho generator counter (not shown) for counting the pulse output of the tacho generator 14 and the parameter. x and z are cleared to 0 (S3).

Here, the parameter z represents a block number of 0 to 15 when the inspection object 3 is equally divided into 16 blocks (bands) in the carrying direction. Further, in this example, the control unit 12 samples the transmitted light amount of infrared light and the transmitted light amount of red light alternately in synchronization with the output pulse of the tachogenerator 14 while conveying the inspection object 3, and the sampling order is even. The ratio D of the transmitted light amount data of the pair of the transmitted light amount data which is the second and the transmitted light amount data which is the next odd number
x is Dx = D _{0 to} D for each block in the sampling order.
8 of ₇ are obtained and their average is taken, and this average value is assumed to represent the color of the block, but the parameter x is the even number and the next odd number as the subscript x of the transmitted light amount ratio Dx at this time. Represents the sampling pair number for each sampling of the second pair.

It should be noted that the output pulse of the tachogenerator 14 is set to 1 between the sampling time point of the infrared light transmission light quantity and the sampling time point of the red light transmission light quantity for obtaining the transmission light quantity ratio Dx.
Although there is a time difference corresponding to the pulse, the transport amount of the inspection object 3 (banknote) during this period is several mm / 10 as described above, which is within the light emitting / receiving area of this color detection sensor. It can be regarded as the ratio of the amount of transmitted light of the same portion of the bill.

Next, the control unit 12 monitors the level change of the tacho generator 14 (S4), and when the level change (pulse output) is detected, the tacho generator counter value T (not shown) is incremented by 1 (S5). Then, at the first increment (when the tacho-generator counter value T = 1 = odd number) (S6, branch N), the A / D conversion value IR of the transmitted light amount of infrared light of the inspection object 3 at this time is calculated. It is input through the light receiving element 9, the amplification unit 10, and the A / D conversion unit 11 (S7), the A / D conversion value IR is temporarily stored in the RAM 13 (S8), the red light LED 5 is turned on, and the infrared light is emitted. The LED 4 is turned off (S9), and the process returns to step S4.

When the tacho generator counter value T = 2 = even (S4 to S6, branch Y) is detected by detecting the pulse output of the next tacho generator 14, the control unit 12 controls the red light of the object 3 to be inspected at this time. A / D conversion value R of transmitted light amount
D is input through the light receiving element 9, the amplification unit 10, and the A / D conversion unit 11 (S10), the infrared light transmission light amount IR temporarily stored in the RAM 13 is loaded (S11), and the red light transmission is performed. Ratio D of transmitted light amount of light amount RD and infrared light transmitted light amount IR
x is obtained by the following equation (1), and the transmitted light amount ratio Dx is
RAM with its subscript (sampling pair number) x value as 0
It is stored in 13 (S12).

[0012]

## EQU1 ## Dx = RD * 80 _H / IR (1) Note that 80 _H = 128 is a constant used for convenience. The control unit 12 then increments the sampling pair number x (S13), clears IR and RD (S14), turns off the red light LED 5 and turns on the infrared light LED 4 (S15). Then, it is checked whether or not the sampling pair number x is 8 or more (S16), and if it is less than 8 (branch N), the above-described operations of steps S4 to S16 are repeated.

In this way, the sampling pair number x =
The transmitted light amount ratios Dx = D _{0 to} D ₇ for _{0 to 7} are sequentially stored, and when it is determined that the sampling pair number x is 8 or more (S16, branch Y), the control unit 12 causes the transmitted light amount ratio D _0. The average DAz of D ₇ to D ₇ (where the subscript z of this DAz represents the block number described above) is calculated by the following equation (2) (S17), and this average value DAz of the band of the block number z of the inspection object 3 is calculated. As a representative value, the subscript (block number) z is stored here in the RAM 13 as 0 (S1).
8).

[0014]

[Equation 2] DAz = (D ₀ + D ₁ + D ₂ + ... + D ₇ ) / 8 (2) Then, the transmitted light amount ratios D _{0 to} D ₇ are cleared (S 19) and the block number z is incremented. (S20),
The sampling pair number x and the counter value T are set to 0 again (S
21), while the block number z is less than 16 (S2
2, branch N), the process returns to step S4 and the subsequent operations are repeated.

In this way, block numbers z = 0 to 15
Representative color value DA of each block of the inspection object 3 (banknote) in order of
z = DA _{0 to} DA ₁₅ are stored in the RAM 13 and the block number z = 16 (S22, branch Y), and the process of FIG. 4 is terminated.

[0016]

By the way, since the mischief in the market is diversified and sophisticated, it is necessary to improve the performance of the bill validator, and for this purpose, it is necessary to prepare a plurality of color detection sensors. However, in the conventional configuration as shown in FIG. 3, when n sets of color detection sensors are prepared, the variable resistance is 2
Since n pieces are required, there is a problem that the adjustment man-hour increases by n times.

It is an object of the present invention to solve such a problem and to provide a color detecting device which can eliminate the adjustment even if n sets of color detecting sensors are prepared.

[0018]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION, color detection apparatus according to claim 1 has been inserted by emitting a first light of Jo Tokoro wavelength (such as a bill) to be inspected Refer to (3)
First light emitting means (such as infrared light LED 4), the object to emit a second light having a predetermined wavelength different from the <br/> first light morphism
Illuminate almost the same spot as the first light irradiation spot on the inspection object.
And a second light-emitting means for morphism (such as red light LED 5), the <br/> first and second light receiving means for receiving the transmitted light of the position of the object based on the irradiation of the light emitting unit (light receiving element 9, etc.) and the color detection sensor 1 or more provided consisting, on the <br/> color detection for each sensor, the detected via the light receiving unit first light transmission quantity (original infrared light transmitted light quantity IR ' Etc.) and before
Amount of transmitted light of the second light (amount of transmitted light RD 'of original red light)
A color detection device for detecting the color of the relevant part of the inspection object from the above , wherein the reference object (reference blank paper) is previously inserted in place of the inspection object and is detected through the light receiving means.
The amount of transmitted light and the amount of transmitted light of the second light are respectively set as bases.
Quasi-first transmitted light amount (reference white paper infrared light transmitted light amount IRs, etc.)
And reference second transmitted light amount (reference white paper red light transmitted light amount RDs
Storage means (EEPROM15)
And the subject to be inserted after the storage by the storage means
The transmitted light amount of the first light detected through the light receiving means of the object is normalized by the reference first transmitted light amount (IR ′).
/ IRs = converts as IR), is converted to the second said amount of transmitted light is normalized by the reference second transmitted light quantity (RD '/ RDs = RD) normalizing means (Red External light amount normalizing means 12A, red light amount normalizing means 12
And B, etc.), it is assumed that and means for detecting the color of the points before Symbol object to be inspected from the normalized pairs of transmitted light amount ratio between (RD / IR, etc.) (control unit 12).

[0019] The color detecting apparatus according to claim 2, which is inserted by emitting a first light of Jo Tokoro wavelength (such as a bill) to be inspected
(3) the first light-emitting means for irradiating (such as infrared light LED 4), the irradiation of the first light of the second of said object to be inspected by emitting light of the first light is different from the predetermined wavelength Almost the same as the place
And a second light-emitting means for irradiating one of the portions (such as red light LED 5), before based on the irradiation of the first and second light emitting means
Serial (such as the light receiving element 9) light receiving means for receiving the transmitted light of the position of the object to be inspected and the color detection sensor 1 or more provided consisting, for each of the color sensor, detecting through said light receiving means
It said first light transmission amount of light (original infrared light transmitted light quantity IR '
Etc.) and the second light transmission quantity (raw red light transmitted light amount R
A color detecting apparatus for detecting the color of the portion of the inspection object from D ', etc.) and detect through said light receiving means by inserting the reference object (reference blank) in place of previously the inspection object
Said first light transmission quantity (reference blank IR transmission light quantity IR
s, etc.) as a reference transmitted light amount ratio of the ratio of the second light transmission quantity (such as the reference blank red light transmitted light amount RDs) (RD
s / IRs, etc.) is stored as a storage means (EEPRO
M15) and is inserted after the storage by the storage means.
Regular wherein the ratio of said first of said transmitted light quantity and the said amount of transmitted light of the second light of the light detecting through said light receiving means of the object (such as RD '/ IR') with the reference transmitted light amount ratio to reduction ((RD '/ IR') / ( converted as RDs / IRs)) and the normalized unit, means for detecting the color of the points before Symbol object to be inspected from the normalized ratio (control Section 12).

A color detection device according to a third aspect is the color detection device according to the first or second aspect, wherein the object to be inspected or
The amount of transmitted light of the second light with respect to the reference object, the transmitted light amount of the object detected through the light receiving unit or the reference object with the first and second light emitting means are both emits light, the first light emitting A value obtained by subtracting the transmitted light amount of the object to be inspected or the reference substance detected through the light receiving device while only the device is emitting light (the original red light transmitted light amount equivalent value RD "or the reference white paper red light transmitted light amount equivalent value RDs'. Etc.).

A color detecting device according to a fourth aspect is the color detecting device according to any one of the first to third aspects, wherein the inspected object is a banknote and the reference object is a reference blank sheet. A color detection device according to a fifth aspect is the color detection device according to the fourth aspect, wherein a portion of the light received by the light receiving means from the first and second light emitting means is transmitted through the inspection object. To move the object to be inspected (along the transport path 1) (transport mechanism 2 or the like), and during this transport, detection of the transmitted light amount of the first light by the light receiving means, and A means for causing the light receiving means to detect the transmitted light amount of the second light at a predetermined minute conveyance interval of the inspection object (tachogenerator 1
4, control unit 12, etc.).

A color detection device according to claim 6 is the color detection device according to any one of claims 1 to 5, wherein
Light is infrared light, and the second light is visible light. A color detection device according to a seventh aspect is the color detection device according to the sixth aspect, wherein the visible light is red light.

[0023]

DETAILED DESCRIPTION OF THE INVENTION

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a main part of a color detecting apparatus as a first embodiment of the present invention and corresponds to FIG. In FIG. 1, in contrast to FIG. 5, infrared light LED
4 and variable resistors 6 and 7 for adjusting the light amount of the red light LED 5 are replaced with fixed resistors 6A and 7A, respectively, and the control unit 1
2 EEPROM (PR that can be written / erased electrically
OM) 15 is additionally provided, and the infrared light transmitted light amount normalizing means 12A and the red light transmitted light amount normalizing means 12 as the main functions relating to the present embodiment among the functions thereof are further provided in the control unit 12.
B is shown.

In the apparatus shown in FIG. 1, a reference blank sheet is previously inserted into the entrance of the transport path 1 instead of the object 3 to be inspected to set the initial processing mode. At this time, the control unit 12 conveys the reference blank sheet to the portion of the color detection sensor composed of the means 4, 5, and 9 via the conveyance mechanism 2 and turns on the infrared light LED 4 and the red light LED 5 alternately, and the light receiving element in each case. The A / D conversion value as the transmitted light amount of each of the LEDs 4 and 5 with respect to the reference blank paper is input (detected) via the amplifier 9, the amplifier 10, and the A / D converter 11. Then, the detected IR light transmitted light amount (referred to as reference white paper infrared light transmitted light amount) IRs and red light transmitted light amount (referred to as reference white paper red light transmitted light amount) RDs are stored in the EEPROM 15.
Remember.

FIG. 2 is a flow chart showing an operation of collecting color data of banknotes by the control unit 12 of FIG. 2, steps S7, S10, and S14 are replaced with steps S7A, S10A, and S14A, respectively, and steps S7B and S10B are added to FIG. Next, with reference to FIG. 1, the points of the operation of FIG. 2 mainly different from the conventional one will be described. That is, when the counter value T for the tacho generator is incremented, if the counter value T is an odd number (S5,
S6, branch N), the control unit 12 obtains the A / D converted value (referred to as the original infrared light transmitted light amount) IR 'of the transmitted light amount of the infrared light of the inspection object 3 at this time, the light receiving element 9, the amplification unit 10, Using the reference blank paper infrared light transmission light amount IRs which is input through the A / D conversion unit 11 (S7A) and which is stored in the EEPROM 15 in advance, the original infrared light transmission light amount IR 'is calculated by the following equation (3). The infrared light transmitted light amount IR is converted (normalized) (S7B).

[0026]

[Number 3] _{IR = IR '* 28 H /} IRs ··· (3) However, 28 _H is a constant used for convenience. That is, the infrared light transmitted light amount IR having the same value as the conventional value can be obtained by the calculation of the equation (3). Similarly, when the counter value T for the tachogenerator is incremented and the counter value T is an even number (S5, S6, branch Y), the control unit 12
Is an A / D converted value (referred to as original red light transmitted light amount) RD 'of the transmitted light amount of red light of the inspection object 3 at this time,
Input through the amplifier 10 and the A / D converter 11 (S10
A), the original red light transmitted light amount RD 'is stored in the EEPROM first
Using the reference white paper red light transmission light amount RDs stored in 15,
It is converted (normalized) into the regular red light transmission light amount RD by the following equation (4) (S10B).

[0027]

RD = RD ′ * 28 _H / RDs (4) However, 28 _H is also a constant used for convenience. That is, the red light transmitted light amount RD having the same value as the conventional value can be obtained by the calculation of the equation (4). Then, the transmitted light amount ratio Dx as the ratio of the pair of infrared light transmitted light amount IR and the red light transmitted light amount RD thus normalized is obtained by using the formula (1) as in the conventional case (S12). In step S14A, I
IR 'and RD' are cleared together with R and RD. In this way, the inspection object 3 is manufactured by the same procedure as the conventional one except the above.
Color representative value DAz = DA ₀ for each block of 16 banknotes
~ DA ₁₅ can be obtained.

Note that steps S7B and S10B of FIG. 2 correspond to the processing of the infrared light transmitted light amount normalizing means 12A and the red light transmitted light amount normalizing means 12B of FIG. 1, respectively. (Embodiment 2) Now, the above equations (3) and (4) are transformed into the equation (1).
Substituting into, the following equation (5) is obtained.

[0029]

Equation 5] Dx = (RD '/ IR' ) * 80 H / (RDs / IRs) ··· (5) i.e., the original infrared light transmission quantity IR 'and the original red light transmitted light quantity as in Example 1 Instead of obtaining the transmitted light amount ratio Dx from the ratio of the normalized infrared light transmitted light amount IR and the red light transmitted light amount RD after normalizing each RD ′, at least the reference white paper infrared light transmitted light amount IRs and the reference The reference transmitted light amount ratio (RDs / I) as a ratio to the white paper red light transmitted light amount RDs.
Rs) is stored in the EEPROM 15, and the ratio (RD '/ IR') of the amount of transmitted original infrared light and the amount of transmitted original red light is normalized by the prestored reference transmitted light amount ratio (RDs / IRs). The ratio Dx may be obtained.

(Embodiment 3) In Embodiments 1 and 2, the transmitted light amount of red light is the received light amount of the light receiving element 9 (A / D conversion value) when only the red light LED 5 is radiated to the inspection object 3. However, instead of this method, the infrared light LE is calculated from the received light amount (A / D conversion value) of the light receiving element 9 when the infrared light LED 4 and the red light LED 5 are simultaneously irradiated to the inspection object 3.
Light receiving element 9 when only D4 is irradiated on the inspection object 3
By subtracting the received light amount (A / D conversion value) of
Although the detection accuracy is slightly lower than those of the methods of Embodiments 1 and 2, it is possible to obtain almost the same amount of transmitted red light.

FIG. 3 shows a third embodiment of the present invention to which the latter method is applied.
3 is a block diagram showing a configuration of a main part as an embodiment of FIG.
In FIG. 3, the reference white paper red light transmitted light amount RDs and the red light transmitted light amount normalizing means 12B in FIG. ing. In the apparatus of FIG. 3 as well, a reference blank sheet is previously inserted into the entrance of the transport path 1 instead of the inspection object 3 to enter the initial processing mode. At this time, the control unit 1
The reference numeral 2 denotes a reference blank sheet conveyed through the conveyance mechanism 2 to the portion of the color detection sensor composed of the means 4, 5, 9 and first the infrared light LED.
4 is turned on, the light receiving element 9, the amplification unit 10, the A / D conversion unit 1
The A / D conversion value as the transmitted light amount of the infrared LED 4 with respect to the reference white paper is input (detected) via 1. Then, the detected amount of transmitted infrared light (reference white paper transmitted infrared light amount) IR
s is stored in the EEPROM 15.

Next, the control unit 12 turns on the red light LED 5 while keeping the infrared light LED 4 on, and the light receiving element 9 and the amplifying unit 1 are turned on.
The A / D conversion value as the transmitted light amount of the reference white paper in the simultaneous lighting state of the LEDs 4 and 5 is input (detected) via the 0 and the A / D conversion unit 11. And the A / D detected at this time
Reference white paper infrared light transmitted light amount IRs detected earlier from the converted value
The value obtained by subtracting (referred to as the reference white paper red light transmission light amount equivalent value)
The RDs' is stored in the EEPROM 15.

FIG. 4 is a flow chart showing the operation of collecting color data of banknotes by the control unit 12 of FIG. 4, steps S9, S10A, S10 are different from those in FIG.
B, S14A and S15 are S9A, S10A 'and S1 respectively.
It is replaced by 0B ', S14A', and S15A. Next, with reference to FIG. 3, differences in the operation of FIG. 4 mainly from FIG. 2 (Embodiment 1) will be described. That is, in FIG. 4, step S
After turning on the infrared light LED 4 at 1, it is not turned off, and the value T of the tacho-generator counter becomes an even number to obtain the red light transmitted light amount RD and the transmitted light amount ratio Dx (S10A 'to S15A) The red light LED 5 is turned on in step S9A before step S9A, and the red light LED 5 is turned off in step S15A at the rear end of the series of processes.

In FIG. 4, the tacho-generator counter value T
Is an odd number, when the original infrared light transmitted light amount IR ′ input from the A / D converter 11 is stored in the EEPROM 15, the reference white paper infrared light transmitted light amount IRs is used, and the regular infrared light transmitted light amount is calculated by the formula (3). Points to be converted (normalized) to IR (process S7
A to S8) are the same as in the first embodiment. However, in order to obtain the red light transmitted light amount RD, first, in step S10A ′, the A / D is performed under the simultaneous lighting of the infrared light LED 4 and the red light LED 5.
From the A / D converted value input from the conversion unit 11, a value (referred to as an original red light transmitted light amount equivalent value) RD ″ is obtained by subtracting the original infrared light transmitted light amount IR ′ previously obtained in step S7A.
Next, in step S10B ', the standard red light transmitted light amount equivalent value RD "is stored in the EEPROM 15 first using the reference white paper red light transmitted light amount equivalent value RDs', and the regular red light transmitted light amount RD is calculated by the following equation (6). Convert to.

[0035]

RD = RD ″ * 28 _H / RDs ′ (6) Hereinafter, the transmitted light amount ratio Dx is obtained from the infrared light transmitted light amount IR and the red light transmitted light amount RD, as in the first embodiment. In step S14A ', IR, RD, IR', RD "are cleared. Further, step S10B 'corresponds to the processing of the red light transmitted light amount equivalent value normalizing means 12B' in FIG.

[0036]

According to the present invention, the transmitted light amount of infrared light and the transmitted light amount of red light with respect to a reference white paper are stored in advance,
The amount of infrared light transmitted and the amount of red light transmitted to the object to be inspected are normalized by using the previously stored reference white paper infrared light transmission light amount and reference white paper red light transmission light amount, and converted to values equivalent to conventional values. Since the color of the inspected object is detected from the ratio of the normalized transmitted infrared light amount and the transmitted red light amount, the huge amount of banknote data collected for banknote discrimination by the conventional method can be reused. At the same time, it is not necessary to previously adjust the light amounts of the infrared light LED 4 and the red light LED 5 with a variable resistor as in the conventional case, and the adjustment process can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a main part as a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of collecting the banknote color data of FIG.

FIG. 3 is a block diagram showing a configuration of a main part as a third embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of collecting the banknote color data of FIG.

FIG. 5 is a conventional block diagram corresponding to FIGS. 1 and 3.

FIG. 6 is a flowchart showing an operation of collecting the banknote color data of FIG.

[Explanation of symbols]

1 transport path 2 Transport mechanism 2a Conveyor belt 3 Inspected 4 Infrared LED 5 Red light LED 6A fixed resistance 7A fixed resistance 8 LED lighting drive 9 Light receiving element 10 Amplifier 11 A / D converter 12 Control unit 12A infrared light transmitted light amount normalizing means 12B Red light transmitted light amount normalizing means 12B 'Red light transmitted light amount equivalent value normalizing means 13 RAM 14 Tacho Generator 15 EEPROM IR Infrared light transmission IR 'Original infrared light transmission amount IRs Standard white paper Infrared light transmission amount RD Red light transmission amount RD 'Original red light transmitted light amount RD ”Original red light transmission light equivalent value RDs standard white paper red light transmitted light quantity RDs' standard white paper red light transmission light equivalent value

Claims (7)

(57) [Claims] 1. A inserted by emitting a first light of Jo Tokoro wavelength
A first light emitting means for irradiating the object to be inspected, prior to emitting the second light having a predetermined wavelength different from the first light
Location substantially the same as the location where the first light is irradiated on the inspection object
And the second light-emitting means for irradiating the, comprises one or more color detection sensor comprising a light receiving means for receiving the transmitted light of the position of the inspection object based on the irradiation of the first and second light emitting means, for each of the color sensor, prior to detecting through said light receiving means
From serial first light amount of transmitted light and the second light amount of transmitted light
Wherein a color detecting apparatus for detecting a color of the portion of the object, the light receiving hand to insert the reference object in place in advance the object to be inspected
The amount of transmitted light of the first light detected through a step and the second light
The first transmitted light amount and the reference first
2 storage means for storing as the amount of transmitted light, and the inspection object inserted after storage by the storage means
The first said amount of transmitted light as well as normalized by the reference first transmitted light amount, the <br/> second of the transmitted light quantity of the reference second transmitted light quantity of the light detected through the light receiving means colors in the normalization means for normalizing, characterized in that it comprises a means for detecting the color of the points before Symbol test <br/>査物from the ratio of the amount of transmitted light between the normalized pairs Detection device. 2. A inserted by emitting a first light of Jo Tokoro wavelength
A first light emitting means for irradiating the object to be inspected, prior to emitting the second light having a predetermined wavelength different from the first light
Location substantially the same as the location where the first light is irradiated on the inspection object
And the second light-emitting means for irradiating the, comprises one or more color detection sensor comprising a light receiving means for receiving the transmitted light of the position of the inspection object based on the irradiation of the first and second light emitting means, for each of the color sensor, prior to detecting through said light receiving means
From serial first light amount of transmitted light and the second light amount of transmitted light
Wherein a color detecting apparatus for detecting a color of the portion of the object, the light receiving hand to insert the reference object in place in advance the object to be inspected
Storage means for storing the ratio between the first light amount of transmitted light and the second light quantity of transmitted light detecting via a step as reference transmitted light amount ratio, the inspection to be inserted after the storage by the storage means and normalizing means for normalizing the ratio of the first of the transmitted light amount and the second of said amount of transmitted light of light detected through the receiving means of the object in the reference transmitted light amount ratio is the normalized color detection apparatus, characterized in that it comprises a means for detecting the color of the points before Symbol object to be inspected from the ratio was. 3. A color detecting apparatus according to claim 1 or 2, wherein the amount of transmitted light of said second light relative to the object to be inspected or the reference object, the first and second light emitting means are both emit light from in and has a state wherein the amount of light transmitted through said object to be inspected is detected through the light receiving unit or the reference compound, only the first light emitting means detects via the light receiving means in a state where the light-emitting
Color detection apparatus, characterized in that be regarded as respective values obtained by subtracting the amount of light transmitted through the inspection object or the reference compound. 4. A color detecting apparatus according to any one of claims 1 to 3, wherein the bill of the object to be inspected, a color detecting apparatus characterized by a reference blank the reference object. 5. A color detecting apparatus according to claim 4, moving the first and second light emitting means and said light receiving means in said sites the inspection object that transmits the specimen in the light received from as for the means for conveying the object to be inspected, during the transport, and the detection of the amount of light transmitted through the first light by the light receiving unit, also the transmitted light amount of the second light by said light receiving means color detection apparatus characterized by comprising means for causing a predetermined small conveyance interval of the detection and the object to be inspected. 6. The color detection device according to claim 1, wherein the first light is infrared light and the second light is visible light. . 7. The color detection device according to claim 6, wherein the visible light is red light.