CN106133543B - Information read device and information-reading method - Google Patents
Information read device and information-reading method Download PDFInfo
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- CN106133543B CN106133543B CN201580014295.0A CN201580014295A CN106133543B CN 106133543 B CN106133543 B CN 106133543B CN 201580014295 A CN201580014295 A CN 201580014295A CN 106133543 B CN106133543 B CN 106133543B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Information read device (9) the deviation correction coefficient that detection is generated by deviation correction coefficient calculating signal generator (7) in amplitude maximum test section (41) calculates the amplitude maximum in 1 period with the detection data of signal, the additive value of the amplitude maximum of output regulation line number in adder in the ranks (43), make the additive value of amplitude maximum divided by regulation line number in peak detection portion (45), export the peak value of amplitude maximum, it according to the peak computational a reference value of side amplitude maximum and is exported in a reference value calculation part (47), it is corrected in divider (48) using the peak value of amplitude maximum and the deviation of a reference value progress detection data of positive side and negative value side, detection data after output calibration deviation.
Description
Technical field
The present invention relates to the information read devices with the line sensor by the configuration of multiple detecting elements on straight line.This hair
The information read device of the bright pattern-information in particular to reading the printing picture using the paper of magnetic ink printing.Here, " paper
" refer to messy paper.Here, it is illustrated by taking bank note as an example.
Background technique
As one of this information read device, there are following magnet sensor arrangements: having the resistance when applying magnetic field
Multiple Magnetic Sensors of value variation are arranged in a straight line line sensor obtained from shape.Magnet sensor arrangement is applied to identification bank note
Paper money identifier etc..Paper money identifier detects the printing based on magnetic ink of the bank note of identification object by Magnetic Sensor
Picture.Also, paper money identifier is according to the printing detected as identifying the true of bank note with the similarity referring to picture that is stored
Pseudo- and currency type etc.." currency type " is the type of the currency based on the face amount amount of money.
Since the magnetic field of the printing picture based on magnetic ink of bank note etc. is small, so, the detection that magnet sensor arrangement obtains
Signal is also small.Also, it attached flip-flop (biasing ingredient) in the detection signal that magnet sensor arrangement obtains.Therefore,
Magnet sensor arrangement carries out the signal amplification of detection signal, is biased the removal of ingredient.Paper documented by patent document 1
Identification device is passed by configuring the 1st magnet exciting coil, detection coil and the 2nd magnet exciting coil in the midway of transport path to based on magnetic
The detection signal of sensor amplifies.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-259068 bulletin (paragraph 0016-0017, Fig. 3)
Summary of the invention
Subject to be solved by the invention
But, it is however generally that, Magnetic Sensor is due to the environmental changes such as ambient temperature or the ongoing change of Magnetic Sensor itself
Etc. reasons, output signal level change.Also, Magnetic Sensor is according to respective inherent characteristic, environmental change or ongoing change etc.
The variation of caused output signal level is different.Therefore, in the method documented by patent document 1, existing can not be made
The problem of signal amplification that the deviation of multiple output signal levels is constant caused by environmental change or ongoing change etc..
The present invention is to complete in order to solve the above problem, for multiple Magnetic Sensors along straight line configuration, energy
Enough inhibit the deviation of output signal level caused by environmental change or ongoing change etc..
Means for solving the problems
Information read device is characterized in that, comprising: line sensor is arranged with multiple Magnetic Sensors；Conductor, configuration
In the equal position of the shortest distance from each Magnetic Sensor；Deviation correction coefficient, which calculates, uses signal generator, leads to
It crosses to the conductor and flows out electric current and generate magnetic field；The magnetic pattern of each Magnetic Sensor is detected in pattern detection portion, generates
Detection data；Correction data calculation part, when for deviation correction coefficient calculating signal generator outflow electric current
The amplitude maximum of detection data detection positive side and the amplitude maximum of negative value side, according to the positive side
The amplitude maximum of amplitude maximum and the negative value side calculates the positive side and negative value side of each Magnetic Sensor
Correction data；And deviation correction unit, it is directed to detection data when having read reading object object, according to the school
The correction of the detection data, the data after output calibration are just being carried out according to each positive and negative value with data.
Invention effect
In accordance with the invention it is possible to the deviation for the output signal level based on environmental change or ongoing change that has been inhibited
Information read device.
Detailed description of the invention
Fig. 1 is the block diagram for showing the information read device of embodiment 1.
Fig. 2 is the block diagram for showing the deviation correction unit of embodiment 1.
Fig. 3 is the outline structure for showing the pattern detection portion 1 of Fig. 1 and the figure of movement.
Fig. 4 is the figure for showing the movement of the enabled generating unit 2 of detection of Fig. 1.
Fig. 5 is the timing diagram for showing the signal exported from the A/D converter section 3 of Fig. 1.
Fig. 6 is the block diagram for showing the information read device of embodiment 2.
Fig. 7 is the block diagram for showing the deviation correction unit of embodiment 2.
Fig. 8 is the block diagram for showing the information read device of embodiment 3.
Fig. 9 is the block diagram for showing the deviation correction unit of embodiment 3.
Figure 10 is the timing diagram for showing the signal exported from the A/D converter section 3 of Fig. 8.
Figure 11 is the block diagram for showing the information read device of embodiment 4.
Figure 12 is the block diagram for showing the deviation correction unit of embodiment 4.
Figure 13 is the timing diagram for showing the signal exported from the A/D converter section 3 of Figure 11.
Figure 14 is the explanatory diagram for being shown specifically the structure in pattern detection portion 1 of Fig. 3.
Figure 15 is the explanatory diagram for showing the other forms in pattern detection portion 1.
Figure 16 is the structure chart for showing the information read device 9 of embodiment 5.
Figure 17 is the timing diagram for showing the relationship of the signal in Figure 16.
Specific embodiment
Embodiment 1.
Fig. 1 is the structure chart of the information read device 9 of embodiments of the present invention 1.Information read device 9 has row sensing
Device 12, conductor 15, deviation correction coefficient calculate with signal generator 7, pattern detection portion 1, correction with data calculation part 16 and partially
Poor correction unit 4.Information read device 9 can have A/D converter section 3, detect enabled generating unit 2, signal adjustment section 5, system control
Portion 6 processed or deviation correction coefficient calculate enabled generating unit 8.
Fig. 2 is the structure chart of the correction data calculation part 16 in Fig. 1.Correction data calculation part 16 has amplitude maximum
It is worth test section 41, in the ranks adder 43, peak detection portion 45, a reference value calculation part 47 and divider 48.Correction is calculated with data
Portion 16 can have line storage A42, line storage B44 or line storage C46.
In the following, being illustrated according to Fig. 1 and Fig. 2 to the movement of the information read device 9 of embodiments of the present invention 1.
Detection data generating unit 10 has pattern detection portion 1 and A/D converter section 3.
Pattern detection portion 1 is calculated according to the calculating of deviation correction coefficient with the deviation correction coefficient generated in signal generator 7
With signal d0, the picture pattern of test object object (reading object object) is detected, the detection signal d1 of analog form is exported.Deviation school
Positive coefficient, which is calculated, generates simultaneously output bias correction coefficient calculating signal d0 with signal generator 7.Pattern detection portion 1 is by deviation school
Positive coefficient calculating uses signal d0 as input.Pattern detection portion 1 detection pair is detected according to deviation correction coefficient calculating signal d0
As the picture pattern of object (reading object object).Pattern detection portion 1 exports inspection of the detected picture pattern as analog form
Survey signal d1.
The detection signal d1 of analog form is converted to the detection data d4 of digital form by A/D converter section 3.Detection data d4
It is detection image pattern and the signal for indicating testing result.
Detect the enabled output of generating unit 2 detection enable signal d2.Detection enable signal d2 indicates whether it is to carry out image graph
During the detection of case." whether be carry out picture pattern detection during " for example refer to whether object is located at detection zone
It is interior.Here, " detection zone " refers to the region for carrying out the reading of pattern-information.
Deviation correction coefficient calculates enabled 8 output bias correction coefficient of generating unit and calculates enable signal d3.Deviation correction system
Number calculate enable signal d3 indicate whether be carry out deviation correction coefficient calculating during.
Correction uses data calculation part 16 to will test data d4 as input.Detection data generating unit 10 is corrected according to deviation
Number calculating generates detection data d4 with the deviation correction coefficient calculating signal d0 generated in signal generator 7.Also, correction is used
Deviation correction coefficient is calculated enable signal d3 as input by data calculation part 16.Correction data calculation part 16 is exported for going
Except the correction for drift data d60 of main scanning direction.
Deviation correction unit 4 will test data d4 and correction uses data d60 as input.Also, deviation correction unit 4 is by deviation
Correction coefficient calculates enable signal d3 as input.Also, deviation correction unit 4 will test enable signal d2 as input.Deviation
4 pairs of corrections of correction unit are multiplied with data d60 with detection data d4, after output eliminates the correction for drift of main scanning direction
Detection data d5.
Signal adjustment section 5 is using the detection data d5 after correction as input.Also, the inspection after 5 pairs of signal adjustment section corrections
Measured data d5 carries out signal adjustment.In turn, the detection data after 5 output adjustment of signal adjustment section is as detection data d6.Signal
It adjusts such as referring to that the gain adjustment being adjusted to gain or the noise for carrying out noise remove reduce.
The output of systems control division 6 indicates systematic reset signal SRT, line synchronising signal LSY, clock signal of system SCL, deviation
Correct the data of ON/OFF signals DP C and the deviation correction coefficient calculating cycle set signal PRD of signal d0.System reset
Signal SRT is the signal for making the circuit portion for being supplied to these signals become original state.Row is generated according to each row period to synchronize
Signal LSY.Line synchronising signal LSY becomes L level according to each row period within certain period." L level " is digital signal
In some threshold value voltage level below signal.Clock signal of system SCL is for keeping the timing of multiple circuits consistent
Signal.Deviation correction ON/OFF signals DP C is to carry out the processing of deviation correction or without the processing of deviation correction for switching
Signal.The cycle set of deviation correction periodic signal is for setting deviation correction coefficient calculating signal with signal PRD
The signal in the period for the sine wave that generator 7 generates.
Line synchronising signal LSY and clock signal of system SCL is fed into pattern detection portion 1, A/D converter section 3, deviation correction
Portion 4, signal adjustment section 5, deviation correction coefficient, which are calculated, calculates enabled 8 (province of generating unit with signal generator 7 and deviation correction coefficient
The slightly diagram of the signal wire of supply).Line synchronising signal LSY and clock signal of system SCL is supplied to these signals for obtaining
Circuit portion in processing synchronization.
In the following, to reading object object be bank note, information read device 9 by Magnetic Sensor detection to bank note implement based on
The printing picture of magnetic ink or the example of magnetic pattern are described in detail.
As shown in figure 3, pattern detection portion 1 has line sensor 12.Fig. 3 be show pattern detection portion 1 outline structure and
The figure of movement.Line sensor 12 is to match multiple Magnetic Sensors 11 of resistance change when being applied with magnetic field along arranged in a straight line
Obtained from setting.Line sensor 12 detects the magnetic pattern assigned to bank note 13.Then, the output of line sensor 12 detection signal d1.
Line sensor 12 is to make multiple Magnetic Sensors (detecting element) 11 of the resistance change when applying magnetic field along straight
Obtained from line is arranged.Deviation correction coefficient, which calculates to be calculated with 7 output bias correction coefficient of signal generator, uses signal d0.
Line sensor 12 detects the magnetic pattern or deviation correction coefficient calculating signal d0 assigned to bank note 13, exports the inspection of analog form
Survey signal d1.In the movement for reading common information, line sensor 12 detects the magnetic pattern assigned to bank note 13.In first initiating
In work, in the movement for generating deviation correction data, 12 detection error correction coefficient of line sensor, which calculates, uses signal d0.It will utilize
Multiple detecting elements 11 of line sensor 12 are examined on the direction vertical with moving direction according to putting in order for detecting element 11
The movement for surveying magnetic pattern, the detection signal d1 for being sequentially output the analog form from each detecting element 11 is known as main scanning.And
And the length direction of line sensor 12 is known as main scanning direction.In addition, detecting element 11 and Magnetic Sensor 11 are same portions
Part.
Bank note 13 is conveyed by conveyer belt 14 equal.In Fig. 3, conveyer belt 14 is roughly shown with dotted line.Also, bank note 13
Across detection zone." detection zone " is the region that the detection of magnetic pattern is carried out by pattern detection portion 1.By bank note 3 relative to pattern
The moving direction (conveying direction) of test section 1 is known as sub-scanning direction.
Main scanning is carried out as unit of detecting element 11.It is to detect row (the linear region read in a main scanning)
Unit carries out subscan.
Information read device 9 moves bank note 13 in the conveying direction relative to line sensor 12 by conveyer belt 14 etc..
Also, information read device 9 passes through scanning paper currency 13 on main scanning direction of line sensor 12.It is above as a result, information is read
Device 9 is taken to obtain indicating the detection signal d1 of the i.e. analog form of data of the two dimensional image of bank note 13.
Deviation correction coefficient of the detection of Magnetic Sensor 11 from deviation correction coefficient calculating signal generator 7 is calculated with letter
Number d0.It is calculated by linear 10 output bias correction coefficient of conductor with letter from the calculating of deviation correction coefficient with signal generator 7
Number d0.Conductor 10 is configured in the position not contacted with Magnetic Sensor 11.The detection of Magnetic Sensor 11 is led such as copper wire due to flowing through
The electric current of body 10 and the variation i.e. deviation correction coefficient calculating signal d0 in magnetic field generated.In addition, from each Magnetic Sensor 11
Shortest distance needs to linear conductor 10 are all equal.The calculating of deviation correction coefficient is based on signal d0 from systems control division
The cycle set signal PRD of 6 outputs.The output signal level of the detection signal d1 of analog form is according to each Magnetic Sensor 11
And it changes.The reason of variation is the environmental changes such as ambient temperature or the ongoing change of Magnetic Sensor itself etc..Therefore, it is calculating
When for inhibiting the deviation correction coefficient of variation of the output signal level of the detection signal d1 of analog form, corrected using deviation
Coefficient, which calculates, uses signal d0.When calculating deviation correction coefficient, it is controlled such that and does not convey bank note 13.
The bank note 13 based on pattern detection portion 1 is synchronously carried out with the line synchronising signal LSY exported from systems control division 6
The detection of magnetic pattern.That is, carrying out the detection of 1 row whenever generating a line synchronising signal LSY." detection of 1 row " is based on composition
The detection of whole detecting elements 11 of line sensor 12.Concurrently, bank note 13 is mobile 1 on sub-scanning direction for detection with 1 row
Row.
By the way that this processing is repeated, it is sequentially output the detection signal d1 of the analog form of multirow.
In addition, the situation shorter than the size of the length direction of line sensor 12 in the size of the main scanning direction of bank note 13
Under, the inspection that the detecting element 11 in the range of the size of the main scanning direction of bank note 13 carries out magnetic pattern can also be used only
It surveys (reading).In this case, passing through whole detecting elements 11 in the range of the size of the main scanning direction of bank note 13
The main scanning of 1 row is completed in detection.
As shown in Figure 1, detecting enabled generating unit 2 has paper currency detection device 21.Paper currency detection device 21 detects line sensor 12
Detection zone in whether there is or not bank note.Also, enabled generating unit 2 is detected according to the output of paper currency detection device 21, generates and exports Fig. 4 institute
The detection enable signal d2 shown.Fig. 4 is the figure for showing the movement for detecting enabled generating unit 2.About the enabled letter of detection shown in Fig. 4
Number d2, the longitudinal axis indicate that the output level of signal, horizontal axis indicate the time.It detects enable signal d2 and for example passes through detection zone in bank note 13
During become ' 1 ' in the detection of magnetic pattern (carry out during).Also, banknote detection sensor 21 does not pass through inspection in bank note 13
Become ' 0 ' in a period of surveying area.In Fig. 4, for easy understanding, paper is recorded as ' 1 ' position in detection enable signal d2
Coin 13.This indicates that at the position of bank note 13, detection enable signal d2 becomes ' 1 ', at the position there is no bank note 13, detection
Enable signal d2 becomes ' 0 '.As shown in Figure 1, detecting enabled generating unit 2 has paper currency detection device 21.21 basis of paper currency detection device
The output of paper currency detection device 21 generates detection enable signal d2 as shown in Figure 4.Paper currency detection device 21, which exports detection generated, to be made
It can signal d2.
Bank note 13 pass through detection zone during be magnetic pattern detection effective period.Bank note 13 does not pass through the phase of detection zone
Between be magnetic pattern detection it is invalid during." detection is effective " refers to and is detected.Also, " detection is invalid " refers to without inspection
It surveys.
Detect enable signal d2 for example becomes ' 1 ' in a period of bank note 13 passes through detection zone.Also, detect enable signal
D2 becomes ' 0 ' in a period of bank note 13 does not pass through detection zone." during bank note 13 passes through detection zone " refers to carry out magnetic pattern
Detection during.
A/D converter section 3 is using the detection signal d1 of analog form as input.Also, A/D converter section 3 is to analog form
It detects signal d1 and carries out A/D conversion.That is, A/D converter section 3 converts analog signals into digital signal.Then, A/D converter section 3 is defeated
The detection data d4 of digital form out.
Fig. 5 is the timing diagram for showing the signal exported from A/D converter section 3.A/D converter section 3 and systematic reset signal SRT,
Clock signal of system SCL, line synchronising signal LSY are synchronously carried out movement.The horizontal axis of Fig. 5 is the time.Also, it is shown in fig. 5 each
The longitudinal axis of signal is output level.In fig. 5, it is shown that the timing of systematic reset signal SRT, the timing of clock signal of system SCL,
The timing of line synchronising signal LSY and the timing of detection data d4.It is communicated due to setting time shaft, thus it is possible to determine each signal
When be compared.
Deviation correction coefficient calculates enabled generating unit 8 and generates deviation correction coefficient calculating enable signal d3.With from system control
The deviation correction ON/OFF signals DP C and line synchronising signal LSY that portion 6 processed exports, which is generated synchronously the calculating of deviation correction coefficient, to be made
It can signal d3.For example, in the case where deviation correction ON/OFF signals DP C is ' 1 ', synchronously with synchronization signal LSY, deviation school
Positive coefficient, which calculates enable signal d3, becomes ' 1 '.In the case where deviation correction ON/OFF signals DP C is ' 0 ', with synchronization signal
Synchronously, deviation correction coefficient calculates enable signal d3 becomes ' 0 ' to LSY.
In the case where the deviation correction ON/OFF signals DP C exported from systems control division 6 is ' 1 ', deviation correction coefficient
It calculates and generates sine wave with signal generator 7, exported as the calculating of deviation correction coefficient with signal d0.The sine wave according to
The cycle set exported from systems control division 6 determines the period with signal PRD.The sine wave exported is applied to line sensor
The electric wire (not shown) drawn on 12.The variation in magnetic field detects as magnetic pattern in pattern detection portion 1 as a result,.
In the following, the case where value in order to indicate detection data d4 each Magnetic Sensor 11, is emphasized, sometimes using mark
Number d4 (i).Label i indicates data related with i-th of Magnetic Sensor 11 in line sensor.Other data are also the same.For example,
The 3rd detection data d4 is recorded as d4 (3).Be not required to it is however emphasized that in the case where omit " (i) ".
Correction data calculation part 16 inputs detection data d4 (i) and deviation correction coefficient calculates enable signal d3.Correction
With data calculation part 16 in the case where it is ' 1 ' that deviation correction coefficient, which calculates enable signal d3, deviation correction coefficient is generated.Separately
Outside, such as in the reset of information read device deviation correction coefficient is generated.Also, according to the change of the external environments such as temperature change
Change, user determines to calculate, if it is ' 1 ' that deviation correction coefficient, which calculates enable signal d3,.Deviation correction coefficient is for removing
Reading correction for drift coefficient of the magnetic pattern relative to sub-scanning direction.Correction is with data calculation part 16 in deviation correction coefficient meter
In the case that calculation enable signal d3 is ' 0 ', not newly-generated deviation correction coefficient, output calculates enable signal in deviation correction coefficient
The deviation correction coefficient that d3 is generated before becoming ' 0 '.It is ' 0 ' that deviation correction unit 4, which calculates enable signal d3 in deviation correction coefficient,
In the case where, deviation correction is carried out to detection data d4 (i) using deviation correction coefficient.Then, 4 output calibration of deviation correction unit
Detection data d5 (i) afterwards.
Correction has amplitude maximum test section 41, in the ranks adder 43, peak detection portion 45, base with data calculation part 16
Quasi- value calculation part 47 and divider 48.Correction data calculation part 16 can have line storage A42, line storage B44 and row
Memory C46.
In the following, the signal name of the negative value side of signal d* (* is different numerical value according to each signal) is expressed as d*
The signal name of the positive side of signal d* is expressed as d*p by n." positive " is the numerical value of positive value.Also, " negative value " is negative
The numerical value of value.
Amplitude maximum test section 41 reads i-th of amplitude maximum d51 (i) that preceding 1 row write enters from line storage A42.
That is, amplitude maximum test section 41 reads i-th of negative value side amplitude maximum d51n that preceding 1 row write enters from line storage A42
(i) and positive side amplitude maximum d51p (i).Also, amplitude maximum test section 41 carries out inputted detection data d4
(i) compared with the size for i-th of negative value side amplitude maximum d51n (i) that preceding 1 row write enters.Also, amplitude maximum detects
Portion 41 carries out the big of i-th of positive side amplitude maximum d51p (i) that inputted detection data d4 (i) and preceding 1 row write enter
Small comparison.In turn, amplitude maximum test section 41 obtains smaller or larger amplitude maximum according to size comparison result
Testing result of the d52 (i) as amplitude maximum test section 41.That is, the knot that amplitude maximum test section 41 compares according to size
Fruit obtains smaller negative value side amplitude maximum d52n (i) and bigger positive amplitude maximum d52p (i) as amplitude
The testing result of maximum value test section 41.Also, amplitude maximum test section 41 is by smaller negative value side amplitude maximum
In d52n (i) and bigger positive amplitude maximum d52p (i) write-in line storage A42.
From the 1st row to " period PR × m ", row carries out present treatment to amplitude maximum test section 41.Period PR is according to the period
The period of setting signal PRD setting.M is positive integer.Also, amplitude maximum test section 41 is not to " period PRD × m+1 "
Row is compared, and is output to adder 43 in the ranks as amplitude maximum testing result d53 (i).That is, amplitude maximum test section
41 are not compared " period PRD × m+1 " row, are negatively worth side amplitude maximum testing result d53n (i) and positive number
Value side amplitude maximum testing result d53p (i) is output to adder 43 in the ranks.Additionally, it is preferred that m=1 or so.
In the ranks adder 43 reads the additive value d54n (i) of the negative value side amplitude maximum of last time from line storage B44
With the additive value d53p (i) of positive side amplitude maximum.Also, in the ranks adder 43 is to the amplitude maximum just inputted
Testing result d53 (i) is added with the additive value d54 (i) of the amplitude maximum of the last time read from line storage B44.That is,
In the ranks adder 43 is read to the testing result d53n (i) of the negative value side amplitude maximum just inputted and from line storage B44
The additive value d54n (i) of the negative value side amplitude maximum of last time out is added.Also, in the ranks adder 43 is to just defeated
The positive side of the testing result d53p (i) of the positive side amplitude maximum entered and the last time from line storage B44 reading shake
The additive value d53p (i) of width maximum value is added.In turn, in the ranks adder 43 will bear testing result d53 (i) and last time
Value obtained from the additive value d54 (i) of numerical value side amplitude maximum is added is as new negative value side amplitude maximum
Additive value d55 (i) is written in line storage B44.That is, in the ranks adder 43 will be to the negative of testing result d53n (i) and last time
Phase of the value obtained from the additive value d54n (i) of value side amplitude maximum is added as new negative value side amplitude maximum
In value added d55n (i) write-in line storage B44.Also, in the ranks adder 43 will be to the positive number of testing result d53p (i) and last time
Phase of the value obtained from the additive value d53p (i) of value side amplitude maximum is added as new positive side amplitude maximum
In value added d55p (i) write-in line storage B44.
In the ranks adder 43 is from (n-1 times) execution present treatment of the 1st row to the (n-1)th row.N is integer.Also, adder in the ranks
43 read into the negative value side amplitude maximum d54n (i) that the (n-1)th behavior stops from line storage B44.Then, in the ranks adder 43
Testing result d53n (i) to the negative value side amplitude maximum of line n and the negative value side amplitude maximum to the (n-1)th behavior only
Value d54n (i) is added.Also, in the ranks adder 43 reads into the positive side that the (n-1)th behavior stops from line storage B44 and shakes
The additive value d54p (i) of width maximum value.Then, in the ranks detection knot of the adder 43 to the positive side amplitude maximum of line n
Fruit d53p (i) is added with the positive side amplitude maximum d54p (i) stopped to the (n-1)th behavior.Also, adder 43 in the ranks
The testing result d53 (i) of amplitude maximum to line n and the amplitude maximum d54 (i) stopped to the (n-1)th behavior are subjected to phase
Value obtained from adding is output to peak detection portion 45 as the addition result d56 (i) of amplitude maximum.That is, in the ranks adder 43
By the testing result d53n (i) of the negative value side amplitude maximum to line n and to the (n-1)th behavior stop negative value side amplitude most
Big value d54n (i) is worth negatively value side amplitude maximum addition result d56n (i) obtained from being added is output to peak
It is worth test section 45.In turn, in the ranks adder 43 by the testing result d53p (i) of the positive side amplitude maximum to line n and
To the (n-1)th behavior stop positive side amplitude maximum d54p (i) be added obtained from value as positive side amplitude most
The addition result d56p (i) being worth greatly is output to peak detection portion 45.Additionally, it is preferred that n=32 or so.
Peak detection portion 45 makes the addition result d56 (i) of the amplitude maximum inputted from adder 43 in the ranks divided by n.That is,
Peak detection portion 45 makes the addition result d56n (i) of the negative value side amplitude maximum inputted from adder 43 in the ranks divided by n.And
And peak detection portion 45 make from adder 43 in the ranks input positive side amplitude maximum addition result d56p (i) divided by
n.Also, each value after division arithmetic is written out to capable storage as the peak value d57 (i) of amplitude maximum by peak detection portion 45
In device C46.That is, each value after division arithmetic is negatively worth the peak value d57n of side amplitude maximum by peak detection portion 45
(i) it is written out in line storage C46 with the peak value d57p (i) of positive side amplitude maximum.In addition, negative value side amplitude is maximum
The peak value d57n (i) of the value and peak value d57p (i) of positive side amplitude maximum is deviation correction coefficient.
A reference value calculation part 47 reads the peak value d58 (i) of the amplitude maximum of preceding 1 row from line storage C46.That is, benchmark
Be worth calculation part 47 from line storage C46 read preceding 1 row negative value side amplitude maximum peak value d58n (i) with preceding 1 row just
The peak value d58p (i) of numerical value side amplitude maximum.In information read device 9 for example by 11 structure of E Magnetic Sensor (detecting element)
In the case where, a reference value calculation part 47 calculates being averaged for the peak value d58n (i) of the negative value side amplitude maximum of i=1~E
Value.Also, a reference value calculation part 47 calculates the average value of the peak value d58p (i) of the positive side amplitude maximum of i=1~E.Into
And the average value of the peak value d58n (i) of the negative value side amplitude maximum of i=1~E is negatively worth by a reference value calculation part 47
The a reference value d59n (i) of side is output to divider 48.Also, a reference value calculation part 47 by the positive side amplitude of i=1~E most
The average value for the peak value d58p (i) being worth greatly is output to divider 48 as a reference value d59p (i) of positive side.
Divider 48 is for example when deviation correction coefficient calculating enable signal d3 is ' 0 ' and detection enable signal d2 is ' 1 '
Division arithmetic is carried out, the deviation correction process of detection data d4 is thus carried out.Divider 48 uses the peak value d58 of amplitude maximum
(i), a reference value d59 (i).That is, peak value d58n (i), positive side amplitude of the divider 48 using negative value side amplitude maximum
The a reference value d59p (i) of the peak value d58p (i) of maximum value, a reference value d59n (i) of negative value side and positive side.A reference value meter
Calculation portion 47 exports a reference value d59n (i) of negative value side and a reference value d59p (i) of positive side.It inputs and examines from A/D converter section 3
Measured data d4 (i).Most from the line storage C46 peak value d58n (i) for reading negative value side amplitude maximum and positive side amplitude
The peak value d58p (i) being worth greatly.A reference value calculation part 47 exports negative value side a reference value d59n (i) and positive side a reference value d59p
(i).For divider 48 in the case where detection data d4 (i) is positive, (1) finds out the positive after deviation correction according to the following formula
The correction data d60p (i) of side.
D60p (i)=d59p (i)/d58p (i) ... (1)
Also, divider 48, in the case where detection data d4 (i) is negative value, (2) find out deviation correction according to the following formula
The correction data d60n (i) of negative value side afterwards.
D60n (i)=d59n (i)/d58n (i) ... (2)
Correction is output to deviation correction unit 4 with data d60 (i) by divider 48.The correction positive of data d60 (i)
Side is correction data d60p (i).Correction is correction data d60n (i) with the negative value side of data d60 (i).
Deviation correction unit 4 is multiplied to correction with data d60 (i) with detection data d4 (i) as following formula (3), makees
It is exported for the detection data d5 (i) after deviation correction.
D5 (i)=d4 (i) × d60 (i) ... (3)
It is feelings other than the above that deviation correction unit 4, which calculates enable signal d3 and detection enable signal d2 in deviation correction coefficient,
Under condition, during being considered as the reading for not carrying out magnetic pattern.Divider 48 exports perseverance in a period of not carrying out the reading of magnetic pattern
Definite value, and it is unrelated with the detection data d4 (i) inputted from A/D converter section 3.Steady state value is, for example, ' 0 '.
Signal adjustment section 5 is fed into from the detection data d5 (i) after the deviation correction that deviation correction unit 4 exports.Signal
Adjustment section 5 is for example including the gain adjustment circuit being adjusted to gain or the noise-reducing circuit etc. of progress noise remove.Letter
After detection data d5 (i) after numbers 5 pairs of adjustment section corrections carries out the adjustment of the signals such as gain adjustment or noise remove, after output adjustment
Detection data d6 (i).
As described above, the information read device 9 in embodiments of the present invention 1 is to such as 32 rows by amplitude
The deviation correction coefficient that maximum value test section 41 generates calculates the positive side amplitude maximum d51p and negative value for using signal d0
Side amplitude maximum d51n is added, and divided by 32.The calculating of information read device 9 is obtained by each Magnetic Sensor as a result,
The peak value d57p of the positive side amplitude maximum and peak value d57n of negative value side amplitude maximum, is written into line storage
In C46.Also, information read device 9 makes the peak value d57p and negative value side amplitude maximum of positive side amplitude maximum
Peak value d57n divided by Magnetic Sensor number E.Information read device 9 calculates the positive side in information read device 9 as a result,
The a reference value d59n of a reference value d59p and negative value side.Also, calculated value is stored in trigger by information read device 9
In.Information read device 9 detects magnetic pattern using each Magnetic Sensor 11, when having input detection data, for detection data
The positive of d4, multiplied by a reference value d59p of positive side, divided by the peak value d58p of positive side amplitude maximum.Also, believe
The negative value that reading device 9 is directed to detection data d4 is ceased, multiplied by a reference value d59n of negative value side, most divided by negative value side amplitude
The peak value d58n being worth greatly.It can make multiple outputs for multiple Magnetic Sensors 11 along straight line configuration according to the operation result
The deviation of signal level is constant.The information read device 9 in embodiments of the present invention 1 is directed to the negative of detection data as a result,
Value is also the same, for multiple Magnetic Sensors 11 along straight line configuration, the deviation of multiple output signal levels can be made constant.
As described above, in the embodiment 1, deviation correction is carried out according to each positive or negative value, as a result, in data
In the case that value is 0, for the detection data at the center for being located at amplitude level, it is able to carry out accurate deviation correction.
Also, in the embodiment 1, it is assumed that the movement of bank note 13 is illustrated by conveyer belt 14, still, takes and generation
It, can also make line sensor 12 mobile.As long as generating the knot of relative movement between test object object and line sensor 12
Structure is then not limited to above structure.If the calculating of deviation correction coefficient is that sine wave signal is illustrated with signal d0, still, only
If periodic signal, then above-mentioned signal is not limited to.
In turn, the case where being bank note to test object object, is illustrated, and still, the present invention can also be applied to detection pair
The case where as object being the paper other than bank note.Also, device the case where progress to applying the present invention to detect magnetic pattern
Explanation, still, the present invention can also be applied to the device of the picture pattern other than detection magnetic pattern.For example, the present invention can also
It is enough to be applied to the image sensor apparatus with multiple light receiving elements.
It is illustrated above using the present invention as information read device, still, a part of configuration information reading device
Signal processing apparatus and by signal processing apparatus execute signal processing method also constitute a part of the invention.
In addition, a reference value calculation part 47 in the respective embodiments described above calculates positive and the negative value side of i=1~E
The average value of the peak value of amplitude maximum.By using average value, the noise in detection data can be cut down and carried out accurate
Correction.But, when setting a reference value as other values such as the amplitude maximums or minimum value of positive and negative value side, although with making
It is compared with the case where average value, is reduced for the effect of noise, be feasible still.
Embodiment 2.
Fig. 6 is the structure chart of the information read device 9a of embodiments of the present invention 2.Information read device 9a uses bank note
The detection enable signal d2 that detector 21 generates controls deviation correction coefficient calculating with signal generator.It is read in information
In device 9a, the position of label identical with the information read device 9 of embodiment 1 carries out movement same as embodiment 1.
The information read device 9a of embodiment 2 and the information read device 9 of embodiment 1 the difference is that, detect enabled letter
Number d2 is input to deviation correction coefficient calculating signal generator 7.
Fig. 7 is to show to detect detection enable signal d2 and deviation correction coefficient calculating signal that enabled generating unit 2 exports
The deviation correction coefficient that generator 7 exports calculates the timing diagram of the relationship with signal d0.In addition, detecting enabled generating unit 2 and row
Synchronization signal LSY is synchronously carried out movement.
In Fig. 7, when detecting enable signal d2 and being ' 0 ', when bank note 13 does not pass through detection zone, sine wave is applied to
Electric wire on line sensor generates magnetic field corresponding with sine wave around Magnetic Sensor 11 as a result, in detection enable signal
D2 be ' 1 ' when, bank note 13 across detection zone when, disconnect the electric current of electric wire, do not generated around Magnetic Sensor 11 as a result,
Magnetic field.
The calculating of deviation correction coefficient is controlled with signal d0 by using detection enable signal d2, when conveying bank note
It also being capable of correcting action.
Embodiment 3.
Fig. 8 is the structure chart of the information read device 9b of embodiments of the present invention 3.There is information read device 9b row to pass
Sensor 12, conductor 15, deviation correction coefficient calculate with signal generator 7, pattern detection portion 1, correction with data calculation part 16b and
Deviation correction unit 4.In information read device 9b, read with the information read device 9 of embodiment 1 or the information of embodiment 2
The position of the identical label of device 9b is taken to carry out movement identical with embodiment 1 or embodiment 2.In fig. 8, with Fig. 6 institute
The structure chart of the embodiment 2 shown the difference is that, generate row addition by detecting enabled generating unit 2 and control signal d7 simultaneously
It is input to correction data calculation part 16b.
Detection data generating unit 10 and deviation correction coefficient calculate enabled generating unit d3, deviation correction unit 4, signal adjustment section
5, the movement of systems control division 6 is identical as embodiment 1.
Fig. 9 is the structure chart of the correction data calculation part 16b in Fig. 8.The correction of embodiment 3 data calculation part
16b has in the ranks adder 43, peak detection portion 45, benchmark portion 47 and divider 46.The correction data of embodiment 3
Calculation part 16b can have line storage B44 or line storage C46.
Figure 10 is to show the detection enable signal d2, row addition control signal d7 and deviation for detecting enabled generating unit 2 and exporting
Correction coefficient calculates the timing diagram that the relationship with signal d0 is calculated with the deviation correction coefficient that signal generator 7 exports.Row addition
Control signal d7 is input to correction data calculation part 16b.In addition, it is synchronous with line synchronising signal LSY to detect enabled generating unit 2b
Ground is acted.
Detect enable signal d2 be ' 0 ' when, bank note 13 do not pass through detection zone when, detection data generating unit 10 by
Fixed electric current is flowed out in electric wire on line sensor, and fixed magnetic field is generated around Magnetic Sensor 11.It is enabled in detection
Signal d2 be ' 1 ' when, bank note 13 pass through detection zone when, detection data generating unit 10 disconnection electric wire electric current, do not exist as a result,
Magnetic field is generated around Magnetic Sensor 11.
It is constant that row addition controls some of signal d7 in a period of the calculating of deviation correction coefficient flows through electric current with signal d0
During become ' 1 ', correction data calculation part 16 export row addition control signal d7 be ' 1 ' in a period of detection data d4
(i) average value is as correction data d60 (i).
That is, in the ranks adder 43 be expert at addition control signal d7 be ' 1 ' in a period of, from line storage B44 read be added
Value d55 (i), the storage of data d54 (i) writing line obtained from being added to additive value d55 (i) with detection data d4 (i)
In device B44.Peak detection portion 45 reads the data d56 (i) of the final line of row addition control signal d7, will control divided by row addition
Data d57 (i) obtained from the line number n that signal d7 is ' 1 ' is written in line storage C46.A reference value calculation part 47 calculates i=1
The average value of the data d58 (i) of~E is output to divider 48 as a reference value d59 (i).Divider 48 exports each magnetic
Data obtained from average value d58 (i) removal a reference value d59 (i) of sensor are as correction data d60 (i).
The calculating of deviation correction coefficient is controlled with signal d0 by using detection enable signal d2, when conveying bank note
It also being capable of correcting action.
Embodiment 4.
Figure 11 is the structure chart of the information read device 9c of embodiments of the present invention 4.Information read device 9c has row
Sensor 12, conductor 15, deviation correction coefficient are calculated with signal generator 7, pattern detection portion 1, correction data calculation part 16c
With deviation correction unit 4.Information read device 9c can have A/D converter section 3, detect enabled generating unit 2c, signal adjustment section 5,
Systems control division 6 or deviation correction coefficient calculate enabled generating unit 8.Information in Figure 11, with embodiment 2 shown in fig. 6
Reading device 9a the difference is that, by detect enabled generating unit 2c generate positive skidding addition control signal d7p and
Negative value skidding addition control signal d7n is simultaneously input to correction data calculation part 16c.
Detection data generating unit 10 and deviation correction coefficient calculate enabled generating unit d3, deviation correction unit 4, signal adjustment section
5, the movement of systems control division 6 is identical as embodiment 1, embodiment 2.
Figure 12 is the structure chart of the correction data calculation part 16c in Figure 11.The correction of embodiment 4 data calculation part
16c has in the ranks adder 43c, peak detection portion 45c, benchmark portion 47c and divider 48c.Also, embodiment 4
Correction can have line storage Bp44p, line storage Bn44n, line storage Cp46p or row with data calculation part 16c and store
Device Cn46n.
Figure 13 is to show the detection enable signal d2 for detecting enabled generating unit 2c output, positive skidding addition control signal
D7p, negative value skidding addition control signal d7n and deviation correction coefficient, which are calculated, corrects system with the deviation that signal generator 7 exports
The timing diagram of the number calculating relationship of signal d0.Positive skidding addition controls signal d7p and negative value skidding addition control letter
Number d7n is input to correction data calculation part 16.It is synchronously carried out in addition, detecting enabled generating unit 2b and line synchronising signal LSY
Movement.
Detect enable signal d2 be ' 0 ' when, bank note 13 do not pass through detection zone when, detection data generating unit 10 pass through by
Fixed current is applied to the electric wire on line sensor, and fixed magnetic field is generated around Magnetic Sensor 11.In the enabled letter of detection
Number d2 be ' 1 ' when, bank note 13 is when passing through detection zone, detection data generating unit 10 is by the electric current of disconnection electric wire, not in magnetic
Magnetic field is generated around sensor 11.In turn, in embodiment 4, the form for generating this 2 kinds of fixed currents of positive and negative is carried out
Explanation.
Positive number skidding addition controls signal d7p in a period of the calculating of deviation correction coefficient flows through positive current with signal d0
Become ' 1 ', during correction data calculation part 16c output positive number skidding addition control signal d7p is ' 1 ' during some is constant
The average value of interior detection data d4 (i) is as correction data d60p (i).Also, negative skidding addition control signal d7p exists
The calculating of deviation correction coefficient flow through negative current with signal d0 in a period of some it is constant during become ' 1 ', correction data meter
Calculation portion 16c exports the average value of the detection data d4 (i) in a period of negative skidding addition control signal d7n is ' 1 ' as school
Just use data d60n (i).
That is, in the ranks adder 43c is in a period of positive number skidding addition control signal d7p is ' 1 ', from line storage
Bp44p read positive number side additive value d55p (i), positive number side additive value d55p (i) will be added with detection data d4 (i) and
In obtained data d54p (i) write-in line storage Bp44p.Also, the phase for being ' 1 ' in negative skidding addition control signal d7n
In, negative side additive value d55n (i) is read from line storage Bn44n, it will be to negative side additive value d55n (i) and detection data
Data d54n (i) obtained from d4 (i) is added is written in line storage Bn44n.Peak detection portion 45c reads positive number skidding
Addition controls the data d56p (i) of the final line of signal d7p, will control the line number that signal d7p is ' 1 ' divided by positive number skidding addition
Data d57p (i) obtained from np is written in line storage Cp46p.Also, read negative skidding addition control signal d7n most
The data d56n (i) of whole row will control data d57n obtained from the line number nn that signal d7p is ' 1 ' divided by negative skidding addition
(i) it is written in line storage Cn46n.A reference value calculation part 47c calculates the average value of the data d58p (i) of i=1~E as base
Quasi- value d59p (i), is output to divider 48c.Also, the average value of the data d58n (i) of i=1~E is calculated as a reference value
D59n (i) is output to divider 48c.Divider 48c output makes positive number side a reference value d59p (i) divided by the flat of each Magnetic Sensor
Data obtained from mean value d58p (i) as correction data d60p (i), output make negative value side a reference value d59n (i) divided by
Data obtained from the average value d58n (i) of each Magnetic Sensor are as correction data d60n (i).
The calculating of deviation correction coefficient is controlled with signal d0 by using detection enable signal d2, when conveying bank note
It also being capable of correcting action.
In addition, in the respective embodiments described above, by the peak value d57p and the negative value side that make positive side amplitude maximum
The peak value d57n of amplitude maximum calculates a reference value d59p and the negative value side of positive side divided by the number E of Magnetic Sensor
A reference value d59n.For example, carrying out division arithmetic in the case where the number E of Magnetic Sensor is not the numerical value shown by 2 power table
Numerical value may not be the number of Magnetic Sensor, but the maximum numerical value shown by 2 power table in the number of Magnetic Sensor.It should
In the case of, circuit scale can be cut down, calculated a reference value also can be obtained and approach the case where using the number of Magnetic Sensor
Value.
Embodiment 5.
Figure 14 is the figure for the structure in pattern detection portion 1 shown in Fig. 3 to be explained in more detail.In Figure 14, in order to
It is easy explanation, is illustrated using xyz coordinate.If main scanning direction is y-axis direction, if sub-scanning direction is x-axis direction, if with
The vertical direction of x-y plane is z-axis direction.From-y-axis direction direction+y-axis direction progress main scanning.From-x-axis direction direction+x
Axis direction carries out subscan.Also, from permanent magnet 19, magnetic resistance 17a, 17b are located above to upper direction is-z-axis side
To.Figure 14 (a) is from the figure in pattern detection portion 1 from-z-axis direction.Figure 14 (b) is from pattern detection portion 1 from-y-axis direction
Figure.Figure 14 (c) is the figure from-x-axis direction.
Multiple Magnetic Sensors 11 shown in Fig. 3 have the first magnetic resistance 17a, the second magnetic resistance 17b, signal as shown in figure 14 respectively
Take out terminal 17c.About magnetic resistance, the direction in the magnetic field of reaction is determining.The resistance value of the first magnetic resistance 17a in Figure 14 is reacted
In the magnetic field of x-axis direction variation and change.Also, the resistance value of the second magnetic resistance 17b in Figure 14 reacts on the magnetic in y-axis direction
Variation and change.
Figure 14 (b) shows the position pass of the magnetic line of force 18 of the generation of permanent magnet 19, the first magnetic resistance 17a, the second magnetic resistance 17b
System.Bank note is conveyed on x-axis direction, that is, sub-scanning direction, so, with the conveying of bank note, reacted in the direction of the x axis
The resistance change of first magnetic resistance 17a.But even if conveying bank note, the electricity of the second magnetic resistance 17b reacted in y-direction
Resistance value will not change.The side of first magnetic resistance 17a is grounded.The other side of first magnetic resistance 17a and signal take out terminal 17c and connect
It connects.Also, the side of the second magnetic resistance 17b is connect with power supply (V).The other side of second magnetic resistance 17b and signal take out terminal 17c and connect
It connects.Therefore, when conveying bank note in the direction of the x axis, the only resistance change of the first magnetic resistance 17a, signal takes out terminal as a result,
The potential change of 17c.According to the variation of the current potential, the variation in the magnetic field with bank note conveying can be read.
Then, the magnetic field generated to conductor 15 is illustrated.As shown in Figure 14 (a) and Figure 14 (b), conductor 15 is configured the
The position of centre in the x-axis direction of one magnetic resistance 17a and the second magnetic resistance 17b.When flowing through electric current from right to left in Figure 14 (a)
When, in Figure 14 (b), according to dextrorotation rule, magnetic field is generated around counterclockwise centered on conducting wire.It only produces in the direction of the x axis as a result,
Magnetisation field, thus it is possible to assign constant magnetic field to the first magnetic resistance 17a.
Figure 15 is the figure for illustrating the other forms in pattern detection portion 1 illustrated in fig. 14.Figure 15 is for Figure 14, and
The direction of the configuration of two magnetic resistance 17b differs 90 °.It is same as Figure 14 in Figure 15, in order to be easy to illustrate, also using xyz coordinate into
Row explanation.Figure 15 (a) is from the figure in pattern detection portion 1 from-z-axis direction.Figure 15 (b) is from pattern detection from-y-axis direction
The figure in portion 1.Figure 15 (c) is the figure from-x-axis direction.
In Figure 15, the resistance value of the first magnetic resistance 17a and the second magnetic resistance 17d react on the variation in the magnetic field of x-axis direction
And change.When conveying bank note, due to the magnetic ink on bank note, the resistance value of the first magnetic resistance 17a and bank note, the second magnetic resistance 17d
Change.Since bank note and the relative position of the first magnetic resistance 17a and bank note are different with the relative position of the second magnetic resistance 17d, so,
The change rate of the resistance of first magnetic resistance 17a and the second magnetic resistance 17d is also different.The difference of the change rate of the resistance shows as signal taking-up
The potential change of terminal 17c can read the variation in the magnetic field with bank note conveying.
In Figure 15 (b), with Figure 14 (b) the case where is same, according to dextrorotation rule, is generated centered on conducting wire around counterclockwise
Magnetic field.Thereby, it is possible to assign constant magnetic field to the first magnetic resistance 17a and the second magnetic resistance 17d in the direction of the x axis.
Then, the deviation that the current potential of terminal 17c is taken out to the signal not conveyed in the case where bank note is illustrated.
First magnetic resistance 17a or second magnetic resistance 17b, 17d generate manufacture deviation in the change rate of resistance value and resistance.In reality
It applies in method illustrated by mode 1~4, calculates correction data in the state of applying magnetic field to Magnetic Sensor, so, become and examines
The correction data in the state of the change rate both sides of resistance value and resistance is considered.Therefore, the unchanged state of resistance value, i.e. not defeated
Correction in the state of paper feeding coin is insufficient.
Figure 16 is the structure chart of the information read device 9 of embodiments of the present invention 5.Information read device 9 has deviation
Correction coefficient calculates with signal generator 7, detection data generating unit 10, detects enabled generating unit 2, systems control division 6, midpoint electricity
Position data calculation part 20, midpoint potential correction unit 22, deviation correction coefficient calculate enabled generating unit 8, correction data calculation part
16, deviation correction unit 4 and signal adjustment section 5.
Deviation correction coefficient calculates with signal generator 7, detection data generating unit 10, detects enabled generating unit 2, system control
Portion 6, the enabled generating unit 8 of deviation correction coefficient calculating, correction data calculation part 16, deviation correction unit 4 and signal adjustment section 5 processed
It is identical as the structure being described in detail in Embodiments 1 to 4, so, it omits the description in the present embodiment.
Figure 17 is to show to detect detection enable signal d2, deviation correction coefficient calculating signal that enabled generating unit 2 exports
The deviation correction coefficient that generator 7 exports calculates the pass with signal d0, row addition control signal d7 and row addition control signal d8
The timing diagram of system.Row addition control signal d7 is input to correction data calculation part 16.During row addition control signal d8 is input to
Point potential data calculation part 20.In addition, detecting enabled generating unit 2 and line synchronising signal LSY is synchronously carried out movement.
Midpoint potential data calculation part 20 be expert at addition control signal d8 be ' 1 ' in a period of to detection data generating unit 10
The detection data d4 of output carries out cumulative addition.Also, midpoint potential data calculation part 20 make the value after cumulative addition divided by into
The line number that row is added, is output to midpoint potential correction unit 22 as midpoint potential data d70.
Midpoint potential correction unit 22 will subtract midpoint potential school obtained from midpoint potential data d70 from detection data d4
Correction data d9 is output to correction data calculation part 16 and deviation correction unit 4.In embodiment 1 to 4, correction is calculated with data
Portion 16 and deviation correction unit 4 are handled according to the detection d4 that detection data generating unit exports, still, in embodiment party of the invention
In formula 5, handled according to midpoint potential correction data d9.
Deviation correction is only carried out in embodiment 1 to 4, still, in embodiments of the present invention 5, alignment current potential
Correction after midpoint potential correction data d9 carry out deviation correction.Therefore, firstly, falling into a trap in midpoint potential data calculation part 20
Midpoint potential data d70 is calculated, deviation correction unit 4 exports the detection data d5 after carrying out deviation correction with data d60 to correction.?
During not conveying bank note, in a period of i.e. detection enable signal d2 is ' 0 ', firstly, detecting enabled generating unit 2 sets row addition control
Signal d8 processed is ' 1 ', and midpoint potential data calculation part 20 calculates midpoint potential data d70 as a result,.Then, deviation correction coefficient
Calculating signal generator 7 sets deviation correction coefficient calculating signal d0 as ' 1 ', flows through electric current in conductor 15, senses in magnetic
Magnetic field is generated near device 11.Row addition control signal d7 is set to become ' 1 ' finally, detecting enabled generating unit 2, correction is used as a result,
Data calculation part 16 output calibration data d60,4 couples of deviation correction unit correction data d60 and midpoint potential correction data d9
It is multiplied, output eliminates the detection data d5 after the deviation correction of the deviation of main scanning direction.
Midpoint potential data generating section calculates correction data in the case where not generating magnetic field, so, magnetic field is being not present
Position, i.e. bank note the region for not printing magnetic ink be also able to carry out correction.
In addition, in the respective embodiments described above, using " parallel " or " vertical " etc. to indicate the positional relationship between component sometimes
Or the term of the shape of component.They indicate the range comprising considering tolerance and the deviation loaded onto of group etc. in manufacture.Therefore,
In the case where the record for having carried out indicating the shape of the positional relationship or component between component in the claims, indicate comprising considering
The range of the deviation that tolerance or group in manufacture are loaded onto etc..
Also, embodiments of the present invention are illustrated as described above, still, embodiment that the present invention is not restricted to these.
Label declaration
1: pattern detection portion；2: detecting enabled generating unit；3:A/D converter section；4: deviation correction unit；5: signal adjustment section；
6: systems control division；7: signal generator is used in the calculating of deviation correction coefficient；8: deviation correction coefficient calculates enabled generating unit；9: letter
Cease reading device；10: detection data generating unit；11: Magnetic Sensor；12: line sensor；13: bank note；14: conveyer belt；15: leading
Body；16: correction data calculation part；17a: the first magnetic resistance；17b, 17d: the second magnetic resistance；17c: signal takes out terminal；18: magnetic force
Line；19: permanent magnet；20: midpoint potential data calculation part；21: paper currency detection device；22: midpoint potential correction unit；41: amplitude
Maximum value test section；42: line storage A；43: adder in the ranks；44: line storage B；45: peak detection portion；46: row storage
Device C；47: a reference value calculation part；48: divider；SRT: systematic reset signal；LSY: line synchronising signal；SCL: system clock letter
Number；DPC: deviation corrects ON/OFF signal；PRD: the cycle set signal of deviation correction coefficient calculating signal；PR: by week
The period of phase setting signal PRD setting.
Claims (8)
1. a kind of information read device, which is characterized in that the information read device includes
Line sensor is arranged with multiple Magnetic Sensors；
Conductor configures the position equal in the shortest distance from each Magnetic Sensor；
Deviation correction coefficient, which calculates, uses signal generator, generates magnetic field and flowing out electric current to the conductor；
The magnetic pattern of each Magnetic Sensor is detected in pattern detection portion, generates detection data；
Correction data calculation part detects the amplitude of negative value side most for the detection data of each Magnetic Sensor
Big value, for the amplitude maximum of the detection data detection positive side of each Magnetic Sensor；According to each described
Magnetic Sensor is added with amplitude maximum of the defined quantity to the negative value side, according to each Magnetic Sensor with
Quantity as defined in described is added the amplitude maximum of the positive side；Make the amplitude of the negative value side after being added
Maximum value calculates the negative value side amplitude peak of each Magnetic Sensor divided by the defined quantity, makes institute after being added
The amplitude maximum for stating positive side calculates the positive side amplitude of each Magnetic Sensor divided by the defined quantity
Peak value；The negative value side a reference value for calculating correction data is exported, the positive number for calculating the correction data is exported
It is worth side a reference value, the institute of positive side is calculated by making positive side a reference value divided by positive side amplitude peak
Correction data are stated, calculate negative value side divided by negative value side amplitude peak by making negative value side a reference value
The correction data calculate the correction and use data；And
Deviation correction unit is directed to detection data when having read reading object object, to the positive of the detection data
It is multiplied with the correction of positive side with data, the correction of negative value and negative value side to the detection data
It is multiplied with data, the data after thus exporting the correction.
2. information read device according to claim 1, which is characterized in that
The correction data calculation part calculates the peak value for the amplitude maximum for making the negative value side divided by the Magnetic Sensor
Quantity in stated number obtained from be worth negatively value side a reference value, calculate the amplitude maximum for making the positive side
Peak value is used as positive side a reference value divided by value obtained from the stated number.
3. information read device according to claim 1, which is characterized in that
The information read device also has the enabled generating unit of detection,
The deviation correction coefficient calculating is with signal generator when the enabled generating unit of the detection does not detect reading object object
Flow out the electric current for generating magnetic field.
4. information read device according to claim 1, which is characterized in that
The correction data calculation part detection of the interior amplitude maximum for carrying out the negative value side and described during the prescribed period
The detection of the amplitude maximum of positive side.
5. information read device according to claim 1, which is characterized in that
The correction individually generates the phase of positive current with data calculation part to the deviation correction coefficient calculating signal generator
Between the detection data with generate negative current during the detection data be added,
The correction be individually created with data calculation part make summarized information corresponding with positive current divided by with phase for flowing through positive current
Between data obtained from corresponding line number as positive side amplitude peak, being individually created makes summarized information corresponding with negative current
Negatively it is worth side amplitude peak divided by with data obtained from line number corresponding during flowing through negative current.
6. a kind of information read device, which is characterized in that the information read device includes
Line sensor is arranged with multiple Magnetic Sensors；
Conductor configures the position equal in the shortest distance from each Magnetic Sensor；
Deviation correction coefficient, which calculates, uses signal generator, generates magnetic field and flowing out electric current to the conductor；
The magnetic pattern of each Magnetic Sensor is detected in pattern detection portion, generates detection data；
Midpoint potential data calculation part is found out when not conveying bank note on Magnetic Sensor and not generating the magnetic field to described
Detection data carries out the value of cumulative addition according to row, makes the value of the cumulative addition divided by the line number for carrying out cumulative addition, generates
Midpoint potential data；
Midpoint potential correction unit subtracts the correction that the midpoint potential data carry out detection data from the detection data,
Midpoint potential correction data after being generated as correction；
Correction data calculation part, for the amplitude maximum and negative of midpoint potential correction data detection positive side
Be worth the amplitude maximum of side, according to each Magnetic Sensor with defined quantity to the amplitude maximum of the negative value side into
Row is added, and carries out phase according to each Magnetic Sensor with amplitude maximum of the defined quantity to the positive side
Add；The amplitude maximum of the negative value side after being added is set to calculate each Magnetic Sensor divided by the defined quantity
Negative value side amplitude peak, calculate the amplitude maximum of the positive side after being added divided by the defined quantity
The positive side amplitude peak of each Magnetic Sensor；The negative value side a reference value for calculating correction data is exported, it is defeated
Out for calculating the positive side a reference value of the correction data, by making positive side a reference value divided by the positive number
Value side amplitude peak calculates the correction data of positive side, by making negative value side a reference value divided by described negative
Numerical value side amplitude peak calculates the correction data of negative value side, calculates the correction and uses data；And
Deviation correction unit is directed to the midpoint potential correction data, corrects to the correction data and the midpoint potential
Data are multiplied, the detection data after output bias correction.
7. information read device according to claim 6, which is characterized in that
There is the Magnetic Sensor in the line sensor the first magnetic resistance, the second magnetic resistance and signal to take out terminal,
The side of first magnetic resistance is grounded, and the other side is taken out terminal with signal and connect,
The side of second magnetic resistance connects to power supply, and the other side is taken out terminal with the signal and connect,
Also, the conductor configuration is between first magnetic resistance and second magnetic resistance.
8. a kind of information-reading method, which comprises the following steps:
Detection data generation step, the line sensor by being arranged with multiple Magnetic Sensors detect magnetic pattern, and output indicates detection
As a result detection data；
The calculating of deviation correction coefficient with signal generate step, by configuration in the shortest distance phase from each Magnetic Sensor
Deng position conductor outflow electric current and generate magnetic field；
Correction calculates step with data, detects the amplitude of negative value side most for the detection data of each Magnetic Sensor
Big value, for the amplitude maximum of the detection data detection positive side of each Magnetic Sensor；According to each described
Magnetic Sensor is added with amplitude maximum of the defined quantity to the negative value side, according to each Magnetic Sensor with
Quantity as defined in described is added the amplitude maximum of the positive side；Make the amplitude of the negative value side after being added
Maximum value calculates the negative value side amplitude peak of each Magnetic Sensor divided by the defined quantity, makes institute after being added
The amplitude maximum for stating positive side calculates the positive side amplitude of each Magnetic Sensor divided by the defined quantity
Peak value；The negative value side a reference value for calculating correction data is exported, the positive number for calculating the correction data is exported
It is worth side a reference value, the institute of positive side is calculated by making positive side a reference value divided by positive side amplitude peak
Correction data are stated, calculate negative value side divided by negative value side amplitude peak by making negative value side a reference value
The correction data calculate the correction and use data；And
Deviation aligning step, for detection data when having read reading object object, to the positive of the detection data
It is multiplied with the correction of positive side with data, the correction of negative value and negative value side to the detection data
It is multiplied with data, the data after thus exporting the correction.
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| JP2014-066070 | 2014-03-27 | ||
| JP2014066070 | 2014-03-27 | ||
| JP2014168311 | 2014-08-21 | ||
| JP2014-168311 | 2014-08-21 | ||
| PCT/JP2015/059101 WO2015147045A1 (en) | 2014-03-27 | 2015-03-25 | Information reading device and information reading method |
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| DE102016015559A1 (en) * | 2016-12-27 | 2018-06-28 | Giesecke+Devrient Currency Technology Gmbh | Method and device for detecting a security thread in a value document |
| US11706364B2 (en) | 2020-01-14 | 2023-07-18 | Mitsubishi Electric Corporation | Signal processing device |
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