CN101436322A - Method and apparatus for detecting detection signal of magnetic sensor - Google Patents
Method and apparatus for detecting detection signal of magnetic sensor Download PDFInfo
- Publication number
- CN101436322A CN101436322A CNA2008102108299A CN200810210829A CN101436322A CN 101436322 A CN101436322 A CN 101436322A CN A2008102108299 A CNA2008102108299 A CN A2008102108299A CN 200810210829 A CN200810210829 A CN 200810210829A CN 101436322 A CN101436322 A CN 101436322A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic sensor
- over against
- mentioned
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1215—Measuring magnetisation; Particular magnetometers therefor
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
- Geophysics And Detection Of Objects (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The invention provides a signal detection method through a magnetic sensor and a detection device. When the magnetic sensor array is used for detecting magnetic carriers, the detection is not influenced by the overlapping adjacent to magnetic domain in the arraying direction from the magnetic sensor, and detection signals are output from each magnetic sensor. In the direction in orthogonal intersection with the proceeding direction of magnetic carrier (13) with a magnetized area (11), the plurality of adjacent magnetic sensors (17) set in array works directed towards the magnetic carriers; Through the work, the output signal which corresponds to the positive-facing magnetic density of the positive-facing magnetic domain positively facing to each magnetic sensor, and the adjacent magnetic density of the adjacent magnetic domain from the positive-facing magnetic domain is extracted. Besides, each adjacent signal component caused by adjacent magnetic density is revised for each output signal; the positive-facing signal components caused by the positive-facing magnetic density are output respectively as the detection signals of each magnetic sensor.
Description
Technical field
The present invention relates to make Magnetic Sensor to carry out work, detect the method and the device of detection signal by this Magnetic Sensor at magnetic carrier with magnetized area.
Background technology
As known in the past, Magnetic Sensor is used in and is used for differentiating for example (for example, with reference to the patent documentations 1) such as discriminating gears of the true and false of bank note, check or securities etc.That is,, for example utilize magnetic ink etc. to have the magnetic carrier of magnetized area, use Magnetic Sensor to detect magnetic field intensity pattern (the following pattern that also is called for short) from magnetized area for these bank note, check, securities etc.And, by the pattern of the magnetized area in detected these magnetic carriers is compared with pre-prepd reference pattern, carry out the differentiation of this magnetic carrier.
In order to detect the pattern of the magnetized area that magnetic carrier has, with Magnetic Sensor with by the direction of the direct of travel quadrature of the magnetic carrier of conveyance on, a plurality of in abutting connection be configured to array-like.And, by these a plurality of Magnetic Sensors be array of magnetic sensors every regular hour output from the magnetic field intensity of the magnetized area of certain speed conveyance as detection signal.In the detection signal in thus obtained each time, detect the pattern of all magnetized areas.
Here, using sensor array, when exporting as detection signal from the magnetic field intensity of magnetized area, each Magnetic Sensor that constitutes array of magnetic sensors obtain with from separately over against magnetized area the magnetic region, promptly over against the magnetic region over against the corresponding output signal of magnetic field intensity, and export as detection signal.
Patent documentation 1: the spy opens the 2006-236198 communique
But, using array of magnetic sensors to detect under the situation of magnetic medium, each Magnetic Sensor not only detect from corresponding with it over against the magnetic region over against magnetic field intensity, but also detect magnetic field intensity from each magnetic region around over against the magnetic region, promptly produce so-called overlapping phenomenon.
Overlappingly produce because have dilatancy from the magnetic field of magnetized area.That is, owing to have dilatancy and the sensor that is magnetized goes out from the magnetic field of magnetized area, thus not only arrived from the magnetic field of each magnetic region by each magnetization sensor of correspondence, and the Magnetic Sensor that is adjacent detects.Therefore, as mentioned above, each Magnetic Sensor not only detects corresponding to magnetic field intensity, and detects the magnetic field intensity of self-corresponding each magnetic region around over against the magnetic region.
Like this, using array of magnetic sensors to detect under the situation of magnetic medium, if produced overlapping, then from the magnetic field intensity of each magnetic region by a plurality of Magnetic Sensor duplicate detection.Therefore, each Magnetic Sensor detects and comprises pairingly over against magnetic field intensity with from the magnetic field intensity of overlapping magnetic field intensity of each magnetic region around the magnetic region, and obtains output signal.Its result, the resolution that has produced each Magnetic Sensor descends, and the reliability of the detection signal of output worsens such problem.
In addition, separate in the Magnetic Sensor of use being assumed to be with the magnetic carrier of detected object, promptly in the divergence type Magnetic Sensor, this overlapping obvious especially.The divergence type Magnetic Sensor is compared with the so-called contact-type Magnetic Sensor that is assumed to be with the magnetic carrier of detected object closely contacts use, owing to for the area that obtains the peristome that magnetic field forms is big, so be subjected to the influence of magnetic field of magnetic region around the magnetic region easily.
In addition, since magnetic field with expand apart from the distance of magnetized area in direct ratioly, so compare with the contact-type Magnetic Sensor, the divergence type Magnetic Sensor of setting the separating distance between Magnetic Sensor and the magnetic carrier greatly and using, the easier influence in the magnetic field of magnetic region on every side that is subjected to over against the magnetic region.Therefore, using the divergence type Magnetic Sensor to detect under the situation of magnetic carrier, overlapping meeting produces significantly influence to the detection signal of output.
Here, overlapping for each Magnetic Sensor around the magnetic region in the magnetic region, results from the magnetic field intensity in abutting connection with the magnetic region of adjacency in the orientation of comfortable Magnetic Sensor at each, promptly overlapping in abutting connection with magnetic field intensity especially can cause the decline of the resolution of Magnetic Sensor.
At each around the magnetic region in the magnetic region, be positioned at by the magnetic region of the direct of travel of the magnetic carrier of conveyance, since be will become by the conveyance magnetic carrier any each Magnetic Sensor over against the magnetic region of magnetic region and/or be the magnetic region over against the magnetic region of each Magnetic Sensor, so obviously descend from the overlapping resolution of each Magnetic Sensor that can not make of these magnetic regions.
In contrast, in each magnetic region around the magnetic region, come overlapping in abutting connection with the magnetic region of adjacency in the orientation of comfortable Magnetic Sensor, can have influence on each Magnetic Sensor that constitutes array of magnetic sensors, so cause the resolution of each Magnetic Sensor obviously to descend.Therefore, result from abutting connection with the overlapping detection signal that will influence output of magnetic field intensity.
Summary of the invention
The objective of the invention is, a kind of detection method and pick-up unit of Magnetic Sensor detection signal are provided, under the situation of using the array of magnetic sensors detection of magnetized carrier that constitutes by contact-type or divergence type Magnetic Sensor, can not be subjected to come the overlapping influence in abutting connection with the magnetic region of adjacency in the orientation of comfortable Magnetic Sensor, from each Magnetic Sensor output detection signal.
To achieve the above object, the detection method of Magnetic Sensor detection signal of the present invention comprises following process.
That is, with the direction of the direct of travel quadrature of magnetic carrier with magnetized area on, make in abutting connection be configured to array-like a plurality of Magnetic Sensors carry out work at magnetic carrier.
And, by this work, from each Magnetic Sensor, take out with from over against each Magnetic Sensor over against the magnetic region over against magnetic field intensity and from this over against magnetic region institute adjacency in abutting connection with the magnetic region in abutting connection with the corresponding output signal of magnetic field intensity.
And, by to each output signal, result from abutting connection with the correction of the adjacent signals composition of magnetic field intensity, resulting from exporting respectively as the detection signal of each Magnetic Sensor over against magnetic field intensity over against signal content.
In addition, according to the pick-up unit of Magnetic Sensor detection signal of the present invention,, have following feature in order to implement the detection method of above-mentioned Magnetic Sensor detection signal:
Promptly, the pick-up unit of Magnetic Sensor detection signal has a plurality of Magnetic Sensors and amending unit, these a plurality of Magnetic Sensors are at the magnetic carrier work with magnetized area, and with the direction of the direct of travel quadrature of this magnetic carrier on by in abutting connection be configured to array-like, this amending unit is revised the output signal of this each Magnetic Sensor, output detection signal.
And, a plurality of Magnetic Sensors, from each Magnetic Sensor, take out with from over against each Magnetic Sensor over against the magnetic region over against magnetic field intensity and from this over against the magnetic region adjacency in abutting connection with the magnetic region in abutting connection with the pairing above-mentioned output signal of magnetic field intensity.
In addition, amending unit is by resulting to each output signal in abutting connection with the correction of the adjacent signals composition of magnetic field intensity, resulting from exporting respectively as detection signal over against signal content over against magnetic field intensity.
Detection method and pick-up unit according to Magnetic Sensor detection signal of the present invention, utilize amending unit, to the output signal that each Magnetic Sensor takes out, result from abutting connection with the adjacent signals composition of magnetic field intensity, promptly based on correction from the overlapping signal content that takes out of adjacency magnetic region.Thus, result from over against the magnetic region over against the detection signal of signal content as each Magnetic Sensor, respectively output.
Therefore, according to the detection method and the pick-up unit of Magnetic Sensor detection signal of the present invention, can not comprise overlapping caused adjacent signals composition, output detection signal from the adjacency magnetic region.Therefore, according to the detection method and the pick-up unit of Magnetic Sensor detection signal of the present invention,, also can suppress to result from the decline of the resolution of overlapping Magnetic Sensor even under the situation of using the divergence type Magnetic Sensor.
Description of drawings
Fig. 1 is used to illustrate the detection method of Magnetic Sensor detection signal of embodiments of the present invention and the stereographic map of pick-up unit.
Fig. 2 is used to illustrate the detection method of Magnetic Sensor detection signal of embodiments of the present invention and the vertical view of pick-up unit.
Fig. 3 is used to illustrate the detection method of Magnetic Sensor detection signal of embodiments of the present invention and the figure of pick-up unit, is the sectional view that the direction of arrow of the otch from I-I line shown in Figure 2 is observed.
Symbol description among the figure: 11-magnetized area; 13-magnetizes carrier; The 15-running face; The 17-Magnetic Sensor; The relative Magnetic Sensor of 18a-; The non-relative Magnetic Sensor of 18b-; The 19-amending unit; The 21-array of magnetic sensors; The 22-driving circuit; The 23-magnetic region; 25,39-amplifying circuit; 29,41-A/D converter; The 32-control part; The 33-storage part; The 35-handling part; The 36-judegment part; The 37-optical sensor.
Embodiment
Below, with reference to accompanying drawing, the detection method of the Magnetic Sensor detection signal of embodiments of the present invention is described.In addition, in order to be able to understand degree of the present invention, each figure just is shown schematically in shape, size and the configuration relation of each inscape.Therefore, structure of the present invention is not limited to any illustrated structure example.
(embodiment)
In the present embodiment, to using array of magnetic sensors to detect the detection method of the Magnetic Sensor detection signal of magnetic carrier, promptly, to the overlapping influence in abutting connection with the magnetic region of adjacency in the orientation that is not subjected to come comfortable Magnetic Sensor, describe from the detection method of the Magnetic Sensor detection signal of each Magnetic Sensor output detection signal and the pick-up unit of Magnetic Sensor detection signal.
Fig. 1 is the stereographic map that is used to illustrate the embodiment of the detection method of Magnetic Sensor detection signal of the present invention and pick-up unit.
In addition, Fig. 2 is the vertical view that is used to illustrate the embodiment of the detection method of Magnetic Sensor detection signal of the present invention and pick-up unit.
In addition, Fig. 3 is the figure that is used to illustrate the embodiment of the detection method of Magnetic Sensor detection signal of the present invention and pick-up unit, is the sectional view that the direction of arrow of the otch from I-I line shown in Figure 2 is observed.
The detection method of the Magnetic Sensor detection signal of present embodiment and pick-up unit are used to detect the magnetization carrier 13 with magnetized area 11 of advancing along certain reference field.Therefore, in the present embodiment, this reference field is made as running face 15, magnetization carrier 11 is set on running face 15, and makes its advance in the horizontal direction (with reference to Fig. 3).In addition, to the direct of travel of magnetic carrier 13, in each figure, represent with arrow.
In addition, utilizing the detection method of Magnetic Sensor detection signal of present embodiment and the magnetization carrier 13 that pick-up unit is detected, for example is that bank note, check or securities etc. have the stationery of magnetic regions and other the tabular tectosome with magnetic regions.And magnetization carrier 13 has magnetized area 11 on whole of detection faces 13a or a part.In addition, in the structure example of Fig. 1 and Fig. 2, show the magnetization carrier 13 that on the part of detection faces 13a, has magnetized area 11.
The pick-up unit of the Magnetic Sensor detection signal of present embodiment has Magnetic Sensor 17 and amending unit 19.
The number of the Magnetic Sensor 17 of configuration is set according to the width of magnetic carrier 13 on the direction of Magnetic Sensor 17 of detected object.That is, detect magnetic carriers 13 in order to use array of magnetic sensors 21, with the configuration number of Magnetic Sensor 17 be set at make array of magnetic sensors 21 at the width of orientation greater than the width of this magnetic carrier 13 on the direction of Magnetic Sensor 17.And, in the present embodiment, the number of Magnetic Sensor 17 is set at, the 1st Magnetic Sensor that begins from two ends at least in a plurality of Magnetic Sensors 17 that constitute array of magnetic sensors 21 do not faced mutually with magnetic carrier 13.Therefore, array of magnetic sensors 21 comprises the Magnetic Sensor 17 faced mutually with magnetic carrier 13 (below, be also referred to as relative Magnetic Sensor 18a) and the Magnetic Sensor of not facing mutually with magnetic carrier 13 17 (below, be also referred to as non-relative Magnetic Sensor 18b).And non-relative Magnetic Sensor 18b disposes across relative Magnetic Sensor 18a.In addition, in Fig. 1 and Fig. 2, show the structure example that has disposed 8 Magnetic Sensors 17, i.e. Magnetic Sensor 17a, Magnetic Sensor 17b, Magnetic Sensor 17c, Magnetic Sensor 17d, Magnetic Sensor 17e, Magnetic Sensor 17f, Magnetic Sensor 17g, Magnetic Sensor 17h.And in the structure example of these Fig. 1 and Fig. 2, Magnetic Sensor 17c, Magnetic Sensor 17d, Magnetic Sensor 17e, Magnetic Sensor 17f in 8 Magnetic Sensors 17 are the relative Magnetic Sensor 18a that faces mutually with the magnetic carrier 13 of detected object.In addition, Magnetic Sensor 17a, Magnetic Sensor 17b, Magnetic Sensor 17g, Magnetic Sensor 17h are the non-relative Magnetic Sensor 18b that does not face mutually with the magnetic carrier 13 of detected object.
Array of magnetic sensors 21 carries out work in order to detect the magnetic carrier 13 of advancing with certain speed on running face 15 every the regular hour.And, by this each work, from each Magnetic Sensor 17, take out the output signal corresponding with detected magnetic field intensity.In the present embodiment, by sending working signal every the regular hour to each Magnetic Sensor 17, make each Magnetic Sensor 17 carry out work simultaneously at magnetic carrier 13 from driving circuit 22.
In the time interval between the gait of march of magnetic carrier 13 and each work, preferably, carry out suitable setting arbitrarily according to as the precision of the kind of the magnetic carrier of detected object, the detection signal that maybe should obtain etc.In addition, magnetic carrier 13 carries out conveyance, advance (not shown) by for example utilizing known roller etc. on running face 15.
Each Magnetic Sensor 17 take out with from the magnetic carrier 13 with this each Magnetic Sensor 17 over against each magnetic region 23, promptly from over against the magnetic region over against magnetic field intensity and come in the orientation of comfortable Magnetic Sensor 17 with this each over against the magnetic region adjacency in abutting connection with the magnetic region in abutting connection with the pairing output signal of magnetic field intensity.Here, in the structure example of Fig. 1, Magnetic Sensor 17c is over against magnetic region 23c, and Magnetic Sensor 17d is over against magnetic region 23d, and Magnetic Sensor 17e is over against magnetic region 23e, and Magnetic Sensor 17f is over against magnetic region 23f.Therefore, each Magnetic Sensor 17 relation over against magnetic region corresponding with each represented in these each combination respectively.In addition, each over against the magnetic region and in the orientation of Magnetic Sensor the magnetic region of adjacency become corresponding with each Magnetic Sensor 17 in abutting connection with the magnetic region.For example, corresponding with Magnetic Sensor 17d in abutting connection with the magnetic region be with Magnetic Sensor 17d be the magnetic region 23c and the 23e of magnetic region 23d adjacency over against the magnetic region.
In addition, the detection method of the Magnetic Sensor detection signal of present embodiment, utilize the array of magnetic sensors 21 of configuration like this, from each Magnetic Sensor 17, take out output signal, this output signal with from separately over against over against the magnetic region over against magnetic field intensity and from each corresponding in abutting connection with the magnetic region in abutting connection with magnetic field intensity over against the magnetic region adjacency.
In addition, array of magnetic sensors 21 is connected with amending unit 19 with A/D converter 29 by amplifying circuit 25.Amplifying circuit 25 amplifies the information of the output signal of each Magnetic Sensor 17 taking-ups that constitute array of magnetic sensors 21 with same multiplying power.In addition, A/D converter 29 becomes numerical data to the information translation of the output signal after amplifying, and is input to amending unit 19.
And, the detection method of the Magnetic Sensor detection signal of present embodiment, the output signal detecting magnetic carrier 13 by array of magnetic sensors 21 and obtaining by circuit part 25 and A/D converter 29, is input to amending unit 19 by each Magnetic Sensor 17.
The purpose that amending unit 19 is set is, output signal is resulted from abutting connection with the correction of the adjacent signals composition of magnetic field intensity, resulting from exporting respectively as detection signal over against signal content over against the magnetic region.
Such as already explained, each Magnetic Sensor 17 detects over against magnetic field intensity with in abutting connection with magnetic field intensity.Therefore, each Magnetic Sensor 17 output signal of taking out comprise result from these over against magnetic field intensity and in abutting connection with magnetic field intensity over against signal content and adjacent signals composition.
Here, the adjacent signals composition that comprises in output signal is to result from because above-mentioned overlapping and detected undesirable signal content in abutting connection with magnetic field intensity.And, such as already explained, because the overlapping cause of detection in abutting connection with magnetic field intensity, can produce resolution decline in each Magnetic Sensor 17, or the problem of the reliability of the detection signal of output deterioration.
Therefore, the detection method of the Magnetic Sensor detection signal of present embodiment is utilized for example known computing machine amending units 19 such as (CPU) in the pick-up unit that is located at, and carries out the correction of adjacent signals composition.Only, export respectively over against the detection signal of signal content as each Magnetic Sensor 17.
For this reason, amending unit 19 has control part 32, storage part 33, handling part 35 and judegment part 36.
In addition, such as already explained, in the detection method and pick-up unit of the Magnetic Sensor detection signal of present embodiment, array of magnetic sensors 21 comprises relative Magnetic Sensor 18a and non-relative Magnetic Sensor 18b, and non-relative Magnetic Sensor 18b disposes across relative Magnetic Sensor 18a.That is, in the present embodiment, in a plurality of Magnetic Sensors 17,, comprise n the Magnetic Sensor that disposes in order from the 1st to n (n is the natural number except 0) over against magnetic carrier 13 as relative Magnetic Sensor 18a.In addition, in Fig. 1 and Fig. 2, illustrate and comprise 4 relative Magnetic Sensor 18a, in order Magnetic Sensor 17c as the 1st relative Magnetic Sensor 18a, Magnetic Sensor 17d as the 2nd relative Magnetic Sensor 18a, Magnetic Sensor 17e as the 3rd relative Magnetic Sensor 18a, the structure example of Magnetic Sensor 17f as the 4th relative Magnetic Sensor 18a.
Here, each relative Magnetic Sensor 18a not only takes out corresponding to signal content, but also takes out according to from the magnetic field intensity of adjacency magnetic region and the adjacent signals composition that is calculated that amasss of correction factor α (α is the real number of 0＜α＜1).In addition, α is the sensitivity of Magnetic Sensor 17 and according to the intrinsic constant of the separating distance between Magnetic Sensor 17 and the magnetic medium 13, is to use the benchmark magnetic carrier with known magnetic field intensity, the value that can calculate by actual measurement.And, in the present embodiment, precompute α.
In addition, from each relative Magnetic Sensor 18a of the 1st to n, except being positioned at the relative Magnetic Sensor at two ends, promptly, the 1st relative Magnetic Sensor (below be also referred to as the 1st Magnetic Sensor), relative Magnetic Sensor with n (below, be also referred to as the n Magnetic Sensor) the relative Magnetic Sensor (below be also referred to as the i Magnetic Sensor) of i (being the natural number of 1＜i＜n), not only detect from over against i over against the magnetic region over against signal content, but also detect from i over against the both sides, magnetic region in abutting connection with the magnetic region, i.e. the adjacent signals composition of i-1 in abutting connection with magnetic region and i+1 in abutting connection with the magnetic region.
Here, A
iAs the output signal of i Magnetic Sensor taking-up, B
iAs result from i over against the magnetic region over against signal content.In addition, if B
I-1As resulting from the signal content of i-1, B in abutting connection with the magnetic region
I+1As from the signal content of i+1 in abutting connection with the magnetic region, then the i Magnetic Sensor adjacent signals of being taken out becomes to be divided into α B
I-1+ α B
I+1Therefore, the output signal A that takes out by the i Magnetic Sensor
iCan represent by following formula (1).
A
i＝B
i+αB
i-1+αB
i+1(1<i<n) ...(1)
In addition, respectively over against the relative Magnetic Sensor that is positioned at two ends from each relative Magnetic Sensor 18a of the 1st to n, promptly the 1st of the 1st Magnetic Sensor and n Magnetic Sensor the over against magnetic region and n over against the magnetic region, be arranged in the two ends of orientation of the Magnetic Sensor 17 of each magnetic region 23.Therefore, these the 1st over against magnetic region and n over against the magnetic region respectively the side in the orientation of Magnetic Sensor 17 and 1 in abutting connection with the magnetic region adjacency.
Therefore, the 1st Magnetic Sensor not only detect from over against the 1st over against the magnetic region over against signal content, but also detect from the 1st over against the magnetic region adjacency in abutting connection with the magnetic region, i.e. the 2nd adjacent signals composition in abutting connection with the magnetic region.And, the n Magnetic Sensor not only detect from over against n over against the magnetic region over against signal content, but also detect from n-1 over against the magnetic region adjacency in abutting connection with the magnetic region, promptly n-1 is in abutting connection with the adjacent signals composition of magnetic region.
Here, A
1As the output signal of the 1st Magnetic Sensor taking-up, B
1As result from the 1st over against the magnetic region over against signal content.A
nAs the output signal of n Magnetic Sensor taking-up, B
nAs result from n over against the magnetic region over against signal content.In addition, if B
2As resulting from the 2nd signal content, B in abutting connection with the magnetic region
N-1As resulting from the signal content of n-1 in abutting connection with the magnetic region, then the 1st Magnetic Sensor adjacent signals of being taken out becomes to be divided into α B
2, and the adjacent signals that the n Magnetic Sensor takes out becomes to be divided into α B
N-1Therefore, the output signal A that takes out by the 1st Magnetic Sensor
1Can represent by following formula (2).And, by the output signal A of n Magnetic Sensor taking-up
nCan represent by following formula (3).
A
1＝B
1+αB
2(i＝1) ...(2)
A
n＝B
n+αB
n-1(i＝n) ...(3)
Here, i-1 in abutting connection with the magnetic region be i-1 among the relative Magnetic Sensor 18a the i-1 Magnetic Sensor over against i-1 over against the magnetic region.Therefore, B
I-1Be corresponding with the i-1 Magnetic Sensor over against signal content.I+1 in abutting connection with the magnetic region be i+1 among the relative Magnetic Sensor 18a the i+1 Magnetic Sensor over against i+1 over against the magnetic region.Therefore, in addition, B
I+1Be corresponding with the i+1 Magnetic Sensor over against signal content.In addition, the 2nd in abutting connection with the magnetic region be among the relative Magnetic Sensor 18a the 2nd the 2nd Magnetic Sensor over against the 2nd over against the magnetic region.Therefore, B
2Be corresponding with the 2nd Magnetic Sensor over against signal content.In addition, n-1 in abutting connection with the magnetic region be n-1 among the relative Magnetic Sensor 18a the n-1 Magnetic Sensor over against n-1 over against the magnetic region.Therefore, B
N-1Be corresponding with the n-1 Magnetic Sensor over against signal content.
In addition, in the array of magnetic sensors 21, non-relative Magnetic Sensor 18b is not owing to existing over against the magnetic region, so there is no need detection signal is detected.Therefore, for non-relative Magnetic Sensor 18b, output signal is considered as 0.
In above-mentioned formula (1)～(3), A
1, A
i, and A
nBe by utilizing array of magnetic sensors 21 to detect the measured value of the output signal that magnetic carriers 13 take out.And such as already explained, α is the setting correction factor that precomputes.Therefore, from the output signal that each relative Magnetic Sensor 18a takes out, can make the item number of each relative Magnetic Sensor 18a that detect consistent by input in formula (1)～(3) with the quantity of formula over against signal content.Therefore, by using formula (1)～(3), can calculate each relative Magnetic Sensor 18a over against signal content.
Below, the pick-up unit of present embodiment had structure illustrated in figures 1 and 2, the situation that promptly has Magnetic Sensor 17c, Magnetic Sensor 17d, Magnetic Sensor 17e and these 4 relative Magnetic Sensor 18a of Magnetic Sensor 17f describes the method over against signal content of using formula (1)～(3) to calculate each relative Magnetic Sensor 18a as an example.
In the structure example of Fig. 1 and Fig. 2, array of magnetic sensors 21 has Magnetic Sensor 17c (below be also referred to as the 1st Magnetic Sensor 17c), Magnetic Sensor 17d (below be also referred to as the 2nd Magnetic Sensor 17d), Magnetic Sensor 17e (below be also referred to as the 3rd Magnetic Sensor 17e), Magnetic Sensor 17f (below be also referred to as the 4th Magnetic Sensor 17f) in order as the 1st to the 4th relative Magnetic Sensor 18a.That is n=4 in this structure example.
The 1st Magnetic Sensor 17c is the 1st among each relative Magnetic Sensor 18a, is positioned at an end of the orientation of Magnetic Sensor 17, therefore, uses above-mentioned formula (2) to calculate over against signal content.That is, since the output signal A1 that the 1st Magnetic Sensor 17c takes out comprise from over against magnetic region 23c over against signal content B
1, with from adjacent signals composition α B in abutting connection with the magnetic region 23d of magnetic region as magnetic region 23c
2So, use above-mentioned formula (2) to calculate, and represent with following formula (4).
A
1＝B
1+αB
2 ...(4)
In addition, the 2nd Magnetic Sensor 17d is the i Magnetic Sensor between the 1st Magnetic Sensor 17c and n Magnetic Sensor, i.e. i Magnetic Sensor between the 4th Magnetic Sensor 17f in this structure example.Therefore, use above-mentioned formula (1) to calculate over against signal content.That is, because the output signal A that the 2nd Magnetic Sensor 17d is taken out
2Comprise from over against magnetic region 23d over against signal content B
2, and from as magnetic region 23d in abutting connection with the magnetic region 23c of magnetic region and the adjacent signals composition α B of magnetic region 23e
1With α B
3So, use above-mentioned formula (1) to calculate, and represent with following formula (5).
A
2＝B
2+αB
1+αB
3 ...(5)
In addition, the 3rd Magnetic Sensor 17e is the i Magnetic Sensor between the 1st Magnetic Sensor 17c and n Magnetic Sensor, i.e. i Magnetic Sensor between the 4th Magnetic Sensor 17f in this structure example.Therefore, use above-mentioned formula (1) to calculate over against signal content.That is, because the output signal A that the 3rd Magnetic Sensor 17e is taken out
3Comprise from over against magnetic region 23e over against signal content B
3, and from as magnetic region 23e in abutting connection with the magnetic region 23d of magnetic region and the adjacent signals composition α B of magnetic region 23f
2With α B
4So, use above-mentioned formula (1) to calculate, and represent with following formula (6).
A
3＝B
3+αB
2+αB
4 ...(6)
In addition,, be positioned at an end opposite of the orientation of Magnetic Sensor 17, therefore, use above-mentioned formula (3) to calculate over against signal content with the 1st Magnetic Sensor 17c because the 4th Magnetic Sensor 17f is n among each relative Magnetic Sensor 18a.That is, because the output signal A that the 4th Magnetic Sensor 17f takes out
4Comprise from over against magnetic region 23f over against signal content B
4, with from adjacent signals composition α B in abutting connection with the magnetic region 23e of magnetic region as magnetic region 23f
3So, use above-mentioned formula (3) to calculate, and represent with following formula (7).
A
4＝B
4+αB
3 ...(7)
According to these (4)～(7), B
2And B
3Can represent with following formula (8) and (9).
B
2＝[(A
2-αA
1)(1-α
2)-αA
3+α
2A
4]/(1-3α
2+α
4) ...(8)
B
3＝(A
3-αA
4-αB
2)/(1-α
2) ...(9)
By the A that each relative Magnetic Sensor 18a is taken out
1, A
2, A
3, A
4In these formula of correction factor α substitution (8) and (9), can calculate B
2And B
3And, by a B who calculates
2And B
3Substitution formula (4) and (7) can calculate B
1And B
4
The detection method of the Magnetic Sensor detection signal of present embodiment for the output signal of being taken out by each Magnetic Sensor 17 is revised, is kept at formula (1)～(3) in the storage part 33 of pick-up unit in advance.
And, in handling part 35,, utilize the output signal A separately that promptly relative Magnetic Sensor 18a takes out by n Magnetic Sensor 17 according to the formula of from storage part 33, reading (1)～(3)
iThe value of (1≤i that i is≤n natural number), calculate separately over against signal B
i(i is the natural number of 1≤i≤n).
More particularly, the output signal A of each that in control part 32, each Magnetic Sensor 17 is taken out
iDiscern.And, each output signal of each Magnetic Sensor 17 of identification is input in the storage part 33.
Handling part 35 from each output signal of identification from n Magnetic Sensor 17, promptly from the output signal of relative Magnetic Sensor 18a, according to the position of each relative Magnetic Sensor 18a, substitution formula (1), formula (2) or formula (3) calculate over against signal content B
i
In addition, handling part 35 is from the Magnetic Sensor 17 that is configured in not the position of facing mutually with magnetic carrier 13, and the output signal of promptly non-relative Magnetic Sensor 18b is considered as 0.
And pick-up unit uses for example known printer, display etc., over against signal content B
iExport as detection signal.
Like this, the detection method of the Magnetic Sensor detection signal of present embodiment can be by being located at the amending unit 19 in the pick-up unit, only exporting as detection signal over against signal content.
In addition, the pick-up unit of the Magnetic Sensor detection signal of present embodiment has optical sensor 37.And, use this optical sensor 37 in the detection method of the Magnetic Sensor detection signal of present embodiment, from array of magnetic sensors 21, select with magnetic carrier 13 over against n Magnetic Sensor 17.
Such as already explained, the detection method of the Magnetic Sensor detection signal of present embodiment, in amending unit 19, each output signal of taking out from relative Magnetic Sensor 18a is input to the formula corresponding with position separately (1), formula (2) or the formula (3).For this reason, in the present embodiment, differentiating output signal from each Magnetic Sensor 17 by handling part 35 is from the output signal of relative Magnetic Sensor 18a and output signal from non-relative Magnetic Sensor 18b.And, identify the Magnetic Sensor 17 at the two ends of the orientation that is positioned at Magnetic Sensor 17 among the relative Magnetic Sensor 18a that is comprised in the array of magnetic sensors 21 by handling part 35, i.e. the position of the 1st Magnetic Sensor and n Magnetic Sensor.
Therefore, in the present embodiment, before the magnetic carrier 13 of advancing on the running face 15 is detected by array of magnetic sensors 21, obtain light signal by using optical sensor 37 from magnetic carrier 13, detect the width W of magnetic carrier 13 in the orientation of Magnetic Sensor 17.
And, in the present embodiment, the width W by optical sensor 37 detected magnetic carriers 13 is input in the judegment part 36 of amending unit 19.Thus, when judegment part 36 is detected by array of magnetic sensors 21 at the magnetic carrier 13 of advancing, each Magnetic Sensor 17 differentiated be the relative Magnetic Sensor 18a that faces mutually with magnetic carrier 13 and the non-relative Magnetic Sensor 18b that do not face mutually with magnetic carrier 13.Then, handling part 35 is selected n the Magnetic Sensor corresponding with detected width W according to the information from judegment part 36 from a plurality of Magnetic Sensors 17.Its result, in the present embodiment, handling part 35 can each output signal of taking out be input to each the position of relative Magnetic Sensor 18a corresponding formula (1), formula (2) or formula (3) in.
Here, in the present embodiment, comprise at array of magnetic sensors 21 under the situation of the Magnetic Sensor of partly facing mutually with magnetic carrier 13 17, this Magnetic Sensor 17 is identified as relative Magnetic Sensor 18a by judegment part 36.
In addition, under the dissimilar situation of the width W in the orientation of Magnetic Sensor 17 of magnetic carrier 13, judegment part 36 makes handling part 35 according to the time interval between each work of the gait of march of magnetic carrier 13 and array of magnetic sensors 21, according to each work of array of magnetic sensors 21, n the corresponding Magnetic Sensor of width W of the magnetic carrier 13 when selecting with this work.
In the present embodiment, by sending working signal every the regular hour to optical sensor 37, optical sensor 37 relative magnetic carriers 13 are worked simultaneously from driving circuit.Be used to make the driving circuit of these optical sensor 37 work, preferably with the driving circuit that is used to drive above-mentioned Magnetic Sensor 17 work 22 shared.In addition, in each figure, show the structure example of using shared driving circuit 22 to drive Magnetic Sensor 17 and optical sensor 37 work.In addition, in the present embodiment, also can adopt structure by control part 32 control Driver Circuit.
In addition, in the present embodiment,, be the resolution setting of the optical sensor 37 that pick-up unit had to be more than at least 2 times of resolution of Magnetic Sensor 17 preferably in order correctly to detect the width W of magnetic carrier 13.It is the optical sensor 37 of the number more than at least 2 times of the pick-up unit configuration of the Magnetic Sensor detection signal of the preferred present embodiment Magnetic Sensor 17 that is equivalent to constitute array of magnetic sensors 21.And preferably the orientation that this each optical sensor 37 is parallel to array of magnetic sensors 21 is disposed in abutting connection with ground.In addition, in the structure example of Fig. 1 and Fig. 2, showing in the individual situation of the number that the light accepting part 37b of transmission-type optical sensor 37 is configured to Magnetic Sensor 17, that is, is the resolution setting of optical sensor 37 2 times situation of Magnetic Sensor 17.In addition, also can dispose a plurality of light source 37a (not shown) by corresponding light accepting part 37b.
Detection method and pick-up unit according to the Magnetic Sensor detection signal of present embodiment, by amending unit 19, to with magnetic carrier 13 over against each Magnetic Sensor 17, be the output signal that each relative Magnetic Sensor 18a takes out, result from abutting connection with the adjacent signals composition of magnetic field intensity, promptly basis is from the correction of the overlapping signal content that takes out of adjacency magnetic region.Thus, can be resulting from exporting respectively as the detection signal of each relative Magnetic Sensor 18a over against the magnetic region over against signal content.
Therefore, the detection method and the pick-up unit of the Magnetic Sensor detection signal of present embodiment can be exported the detection signal by the overlapping adjacent signals composition that causes that does not comprise from the adjacency magnetic region.Therefore, the detection method and the pick-up unit of the Magnetic Sensor detection signal of present embodiment even under the situation of having used the divergence type Magnetic Sensor, also can suppress the decline because of the resolution of overlapping each Magnetic Sensor 17 that causes.
Claims (6)
1. the detection method of a Magnetic Sensor detection signal is characterized in that,
With the direction of the direct of travel quadrature of magnetic carrier with magnetized area on, make in abutting connection be configured to a plurality of Magnetic Sensors of array-like, carry out work at above-mentioned magnetic carrier,
By this work, from each above-mentioned Magnetic Sensor, take out with from over against each Magnetic Sensor over against the magnetic region over against magnetic field intensity and from this over against magnetic region institute adjacency in abutting connection with the magnetic region in abutting connection with the corresponding output signal of magnetic field intensity,
To each this output signal, result from the correction of above-mentioned adjacent signals composition in abutting connection with magnetic field intensity, resulting from above-mentioned exporting respectively as the detection signal of each above-mentioned Magnetic Sensor over against magnetic field intensity over against signal content.
2. the detection method of Magnetic Sensor detection signal according to claim 1 is characterized in that,
In above-mentioned a plurality of Magnetic Sensors, comprise over against above-mentioned magnetic carrier from the 1st to n n Magnetic Sensor of configuration in order, wherein n is the natural number except 0,
The output signal that the i Magnetic Sensor that is configured in i by this n Magnetic Sensor is taken out is made as A
i, be made as B over against the magnetic region over against signal content resulting from i over against above-mentioned i Magnetic Sensor
i, correction factor is made as α and becomes be divided into α B with i+1 in abutting connection with the adjacent signals of magnetic region over against the i-1 of magnetic region adjacency in abutting connection with the magnetic region with above-mentioned i resulting from
I-1With α B
I+1, wherein, i is the natural number of 0＜i＜n, α is the real number of 0＜α＜1,
The output signal that the 1st the 1st Magnetic Sensor taken out that is configured in by this n Magnetic Sensor is made as A
1, be made as B over against the magnetic region over against signal content over against the 1st of above-mentioned the 1st Magnetic Sensor resulting from
1, and become to be divided into α B with the above-mentioned the 1st the 2nd adjacent signals resulting from abutting connection with the magnetic region over against the magnetic region adjacency
2,
The output signal that the n Magnetic Sensor that is configured in n by this n Magnetic Sensor is taken out is made as A
n, be made as B over against the magnetic region over against signal content resulting from n over against above-mentioned n Magnetic Sensor
n, and become to be divided into α B with the adjacent signals of above-mentioned n over against the n-1 of magnetic region adjacency in abutting connection with the magnetic region resulting from
N-1,
Pass through formula
A
i＝B
i+αB
i-1+αB
i+1 (1<i<n)
A
1＝B
1+αB
2(i＝1)
A
n＝B
n+αB
n-1 (i＝n)
The A that utilization is taken out by a said n Magnetic Sensor
iValue, calculate B
i, export respectively as the detection signal of each above-mentioned Magnetic Sensor over against signal content above-mentioned, wherein i is the natural number of 1≤i≤n.
3. the detection method of Magnetic Sensor detection signal according to claim 2 is characterized in that,
Use the width of the above-mentioned magnetic carrier of light sensors in the orientation of above-mentioned Magnetic Sensor,
To should detected width, from above-mentioned a plurality of Magnetic Sensors, select a said n Magnetic Sensor.
4. the pick-up unit of a Magnetic Sensor detection signal is characterized in that, has:
A plurality of Magnetic Sensors, it carries out work at the magnetic carrier with magnetized area, and, with the direction of the direct of travel quadrature of this magnetic carrier in abutting connection be configured to array-like; With
Amending unit, its output signal to each above-mentioned Magnetic Sensor is revised, and output detection signal,
Above-mentioned a plurality of Magnetic Sensor, from each this Magnetic Sensor, take out with from over against each Magnetic Sensor over against the magnetic region over against magnetic field intensity and from this over against magnetic region institute adjacency in abutting connection with the magnetic region in abutting connection with the corresponding above-mentioned output signal of magnetic field intensity,
Above-mentioned amending unit to each above-mentioned output signal, results from the correction of above-mentioned adjacent signals composition in abutting connection with magnetic field intensity, resulting from above-mentioned exporting respectively as above-mentioned detection signal over against signal content over against magnetic field intensity.
5. the pick-up unit of Magnetic Sensor detection signal according to claim 4 is characterized in that,
Above-mentioned a plurality of Magnetic Sensor, comprise over against above-mentioned magnetic carrier from the 1st to n n Magnetic Sensor of configuration in order, wherein n is the natural number except 0,
Above-mentioned amending unit comprises storage part and handling part,
Described storage part is stored following data and formula in advance:
The output signal that the i Magnetic Sensor that is configured in i by this n Magnetic Sensor is taken out is made as A
i, be made as B over against the magnetic region over against signal content resulting from i over against above-mentioned i Magnetic Sensor
i, correction factor is made as α, and becomes be divided into α B with i+1 in abutting connection with the adjacent signals of magnetic region over against the i-1 of magnetic region adjacency in abutting connection with the magnetic region with above-mentioned i resulting from
I-1And B
I+1, wherein, i is the natural number of 0＜i＜n, α is the real number of 0＜α＜1,
The output signal that the 1st the 1st Magnetic Sensor taken out that is configured in by this n Magnetic Sensor is made as A
1, be made as B over against the magnetic region over against signal content over against the 1st of above-mentioned the 1st Magnetic Sensor resulting from
1, and become to be divided into α B with the above-mentioned the 1st the 2nd adjacent signals resulting from abutting connection with the magnetic region over against the magnetic region adjacency
2,
The output signal that the n Magnetic Sensor that is configured in n by this n Magnetic Sensor is taken out is made as A
n, be made as B over against the magnetic region over against signal content resulting from n over against above-mentioned n Magnetic Sensor
n, and become to be divided into α B with the adjacent signals of above-mentioned n over against the n-1 of magnetic region adjacency in abutting connection with the magnetic region resulting from
N-1,
Formula
A
i＝B
i+αB
i-1+B
i+1 (1<i<n)
A
1＝B
1+αB
2 (i＝1)
A
n＝B
n+B
n-1 (i＝n)
Above-mentioned handling part according to the above-mentioned formula of reading, utilizes the A that is taken out by a said n Magnetic Sensor from above-mentioned storage part
iValue calculate B
i, wherein i is the natural number of 1≤i≤n.
6. the pick-up unit of Magnetic Sensor detection signal according to claim 5 is characterized in that,
Have optical sensor, it detects the width of above-mentioned magnetic carrier in the orientation of above-mentioned Magnetic Sensor, and corresponding above-mentioned detected width, selects a said n Magnetic Sensor from above-mentioned a plurality of Magnetic Sensors.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007294235 | 2007-11-13 | ||
| JP2007294235A JP5136009B2 (en) | 2007-11-13 | 2007-11-13 | Detection method and detection apparatus for magnetic sensor detection signal |
| JP2007-294235 | 2007-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101436322A true CN101436322A (en) | 2009-05-20 |
| CN101436322B CN101436322B (en) | 2011-05-25 |
Family
ID=40710752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102108299A Active CN101436322B (en) | 2007-11-13 | 2008-08-20 | Method and apparatus for detecting detection signal of magnetic sensor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5136009B2 (en) |
| KR (1) | KR101004594B1 (en) |
| CN (1) | CN101436322B (en) |
| TW (1) | TWI372366B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262794A (en) * | 2011-08-10 | 2011-11-30 | 深圳市怡化电脑有限公司 | Intelligent magnetic sensor module for detection of paper money |
| CN103400440A (en) * | 2013-08-15 | 2013-11-20 | 广州广电运通金融电子股份有限公司 | Magnetic signal detection method and device |
| CN113544528A (en) * | 2019-03-13 | 2021-10-22 | 日本电产理德股份有限公司 | Detection value correction system, coefficient calculation method, and detection value correction method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6226629B2 (en) * | 2013-08-09 | 2017-11-08 | 株式会社東芝 | Magnetic detection device and paper sheet processing device |
| CN105182259A (en) * | 2015-08-04 | 2015-12-23 | 南京信息工程大学 | Space magnetic field intensity distributed synchronous detection device and method |
| EP3650816B1 (en) * | 2018-11-12 | 2021-01-27 | Melexis Technologies SA | Magnetic position sensor system and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0795098B2 (en) * | 1989-03-29 | 1995-10-11 | 株式会社島津製作所 | Magnetic detector |
| JPH03179214A (en) * | 1989-12-07 | 1991-08-05 | Fuji Electric Co Ltd | Output system of array sensor |
| JP3745546B2 (en) | 1998-12-09 | 2006-02-15 | 日立オムロンターミナルソリューションズ株式会社 | Data correction device |
| DE60200091T2 (en) * | 2001-01-08 | 2004-04-22 | De La Rue International Ltd., Basingstoke | Magnetic thread reader |
| JP4507585B2 (en) | 2003-12-16 | 2010-07-21 | 日本電産サンキョー株式会社 | Drive circuit for paper sheet identification sensor and paper sheet identification device |
| JP2006350820A (en) * | 2005-06-17 | 2006-12-28 | Toshiba Corp | Paper sheet identification device |
| JP4953666B2 (en) * | 2006-03-08 | 2012-06-13 | 日本電産サンキョー株式会社 | Magnetic sensor device and identification device |
-
2007
- 2007-11-13 JP JP2007294235A patent/JP5136009B2/en not_active Expired - Fee Related
-
2008
- 2008-07-18 TW TW097127442A patent/TWI372366B/en active
- 2008-07-18 KR KR1020080070049A patent/KR101004594B1/en active IP Right Grant
- 2008-08-20 CN CN2008102108299A patent/CN101436322B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262794A (en) * | 2011-08-10 | 2011-11-30 | 深圳市怡化电脑有限公司 | Intelligent magnetic sensor module for detection of paper money |
| CN103400440A (en) * | 2013-08-15 | 2013-11-20 | 广州广电运通金融电子股份有限公司 | Magnetic signal detection method and device |
| CN113544528A (en) * | 2019-03-13 | 2021-10-22 | 日本电产理德股份有限公司 | Detection value correction system, coefficient calculation method, and detection value correction method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090049525A (en) | 2009-05-18 |
| KR101004594B1 (en) | 2010-12-28 |
| CN101436322B (en) | 2011-05-25 |
| JP5136009B2 (en) | 2013-02-06 |
| TWI372366B (en) | 2012-09-11 |
| JP2009121872A (en) | 2009-06-04 |
| TW200921563A (en) | 2009-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101436322B (en) | Method and apparatus for detecting detection signal of magnetic sensor | |
| US8368879B2 (en) | System and method for the ultrasonic detection of transparent window security features in bank notes | |
| CN102007400B (en) | Periodic defect detecting device and method for the same | |
| CN102841136B (en) | A kind of the change in formation row eddy-current instrument method for designing based on array element coil | |
| CN100523738C (en) | Scale reading apparatus | |
| CN101082999A (en) | Paper sheet identifying and checking apparatus | |
| US6744050B1 (en) | Method and device for controlling paper documents of value | |
| CN103323466A (en) | High-accuracy detection system for line trace of solar silicon wafer | |
| JP6366733B2 (en) | Paper thickness determination method and thickness determination apparatus | |
| JPWO2019202715A1 (en) | Paper leaf processing equipment and paper leaf processing method | |
| CN102674101A (en) | Displacement measuring device for wire rope of elevator | |
| DE112015004527T5 (en) | Image reading device | |
| CN101118232A (en) | Method for checking cloth | |
| CN104574650A (en) | Sorting method | |
| CN208938119U (en) | Iron ladle identifying system based on planar bar code technology | |
| CN106652157A (en) | Method and device for detection of floating roller magnetism | |
| CN201436636U (en) | A laser false check and draft distinguishing instrument | |
| CN202167073U (en) | Multiple-point note thickness measurement device for currency counting and bundling integrated machine | |
| CN202599356U (en) | Elevator steel wire rope displacement measuring device | |
| CA1295711C (en) | Scannable document velocity detector | |
| JPH0520521A (en) | Coin discriminating device | |
| CN109101857A (en) | Iron ladle identifying system based on planar bar code technology | |
| CN207489142U (en) | The module arrangement of cash inspecting machine false-identifying device | |
| CN2378366Y (en) | Paper money predetermined length metering device for money tally | |
| KR20070070652A (en) | Device for measuring sensitivity of optical sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |