JP2002236872A - Magnetic pattern recognizing device and magnetic pattern recognizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic pattern recognizing device capable of reading a code from an external part of a product by arranging the code of product control information in a place invisible in an external appearance such as the inside of the product. SOLUTION: The magnetic pattern recognizing device has a magnetic code reader 2 having a magnetic sensor array 4, and a controller 3. A label 5 stuck to the reverse side of a casing 6 of the product, and carved with a pattern such as a bar code 5A is magnetically read by the magnetic code reader 2 from the surface side of the casing 6 of the product, and after analyzing and checking up the read bar code 5A by the controller 3, the product of the casing 6 is specified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic pattern recognizing apparatus for recognizing a pattern (pattern) imprinted on a conductor based on a change in magnetic flux, and more particularly to a conductive pattern on which a pattern (pattern) such as a bar code is imprinted. The present invention relates to a magnetic pattern recognizing device and a magnetic pattern recognizing method capable of recognizing even from an invisible position such as the back of a body.

[0002]

2. Description of the Related Art Conventionally, barcodes (white and black codes) corresponding to product information have been used for integrated management of information such as production management of products, sales management (POS: Point Of Sale), inventory management or maintenance. 2. Description of the Related Art There are known those in which a printed label is attached to a product, a barcode is directly printed on the product, and the barcode is recognized by optically reading with a barcode reader.

[0003] Further, an ID tag is attached to a product, and product information recorded in a storage element built in the ID tag is communicated using a communication medium such as electromagnetic coupling, light or microwave, and the R / F. What is recognized by receiving with an ID antenna (ID antenna) is known.

[0004]

In the case of unified management of information using a barcode and a barcode reader, there are the following problems. : During the production of a product, the barcode becomes dirty or rubbed, so that the barcode becomes unclear and cannot be read by a barcode reader. : When a bar code is attached to a product, the aesthetic appearance of the product may be impaired, and the bar code must be peeled off at the time of product shipment. : When a barcode is attached to a tray for production, the product and the barcode are separated at the time of shipment. A: When a bar code is pasted on a tray for production, the products on the tray may be replaced due to production reasons, and it is not possible to centrally manage products and information. : The product and barcode are separated at the time of shipment due to the items and it becomes impossible to manage the product after shipment. Therefore, a new lot number or the like must be stamped or affixed to the product. For this reason, there is a possibility that a new man-hour for the lot number stamping may be generated or the appearance of the product may be impaired by the lot number stamping.

[0005] On the other hand, in the case of integrated management of information using an ID tag and an ID antenna, similarly to the case of a bar code,
There are the problems of the above items. In addition, there are the following problems. : Space for attaching an ID tag is required, and it cannot be applied to a small product. : The weight and volume of the product are increased by attaching the ID tag, and the space for storing the product is widened.

[0006] Further, since the barcode is also used in a POS (Point Of Sale) system for managing sales information, there is the following problem. : Since the bar code of the product can be recognized at a glance, there is a possibility that the bar code is tampered or falsified, and that the bar code is peeled off. : There is a possibility that the aesthetic appearance is impaired and the commercial value is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a code for product management information in a place invisible from the outside, such as inside a product, and to read the code from outside the product. And a magnetic pattern recognizing method.

[0008]

In order to solve the above-mentioned problems, a magnetic pattern recognition apparatus according to the present invention applies a static magnetic field to a conductor on which a pattern (pattern) is imprinted, cuts off the static magnetic field, and reduces the magnetic flux density. It is characterized in that a pattern (pattern) is recognized by calculating a change in a time constant from the transient response characteristic.

A magnetic pattern recognition device according to the present invention comprises:
By interrupting the static magnetic field after applying the static magnetic field, the residual magnetic flux (residual magnetic flux density) of the conductor is attenuated over time, and the attenuation characteristic (transient response characteristic) of the engraved pattern (pattern) Since it depends on the presence or absence or shape, the transient response characteristic (attenuation characteristic) of the residual magnetic flux density is detected and the time constant is calculated as numerical data, so that the pattern (pattern) can be recognized from the change in the time constant. By attaching a label coded with the engraved pattern (pattern) to the back side of the product or directly engraving it, it is possible to recognize the product information, so that it does not impair the aesthetic appearance of the product and Can unify information management after shipment, and improve the efficiency of information management,
Convenience can be improved.

Further, the magnetic pattern recognition apparatus according to the present invention applies a static magnetic field to a magnetic body on which a pattern (pattern) is imprinted, and recognizes the pattern (pattern) from the magnitude of the magnetic flux density leaking from the magnetic body. It is characterized by.

[0011] The magnetic pattern recognition device according to the present invention comprises:
Since the magnitude of the leakage magnetic flux density that differs depending on the presence or absence or the shape of the pattern (pattern) imprinted on the magnetic material can be detected, and the pattern of the leakage magnetic flux density peculiar to the stamped pattern (pattern) can be recognized. By attaching a label coded with the pattern (pattern) on the back of the product or by directly engraving it, it is possible to recognize the product information, so that the product appearance can be recognized without impairing the appearance of the product Information management after shipment can be centralized,
Information management can be made more efficient, and convenience can be improved.

Further, the magnetic pattern recognition device according to the present invention applies an AC magnetic field to the conductor on which the pattern (pattern) is imprinted, and recognizes the pattern (pattern) from the amount corresponding to the eddy current generated in the conductor. It is characterized by the following.

[0013] The magnetic pattern recognition device according to the present invention comprises:
Detecting an amount (for example, induced voltage) corresponding to an eddy current generated by an AC magnetic field applied to a conductor, and recognizing an amount of a pattern corresponding to an eddy current peculiar to a stamped pattern (pattern). The product information can be recognized by attaching a label coded with the engraved pattern (pattern) on the back side of the product or directly engraving it, so that the beauty of the product is not impaired, It is possible to unify information management from the time of product production to the time after shipment, to improve the efficiency of information management, and to improve convenience.

Further, the pattern (pattern) of the conductor or the magnetic material according to the present invention is characterized in that the pattern (pattern) is recognized from the marking surface of the pattern (pattern) or the back surface.

Further, a pattern (pattern) according to the present invention
Is a bar code formed of concavities and convexities imprinted on a conductor or a magnetic body.

The pattern according to the present invention is JA
Barcodes such as N (Japan Article Number) codes are engraved on conductive or magnetic materials, and patterns (patterns) can be recognized from the engraved surface or the back of the barcode, so that existing barcode systems can be used and barcodes can be used. There are few restrictions on the reading direction, and the operability of the barcode reader (recognition device) can be improved.

Further, the barcode according to the present invention is characterized in that the barcode has information also in the depth direction of the groove imprinted on the conductor or the magnetic body.

Further, the bar code according to the present invention is characterized in that a reference value is set in a depth direction of a groove imprinted on a conductor or a magnetic material.

In the bar code according to the present invention, information is provided in the depth direction of the groove imprinted on the conductor or the magnetic material, and the reference value is set in the depth direction of the groove. By setting the value above and below the value, even if the bar code has the same width as the unevenness, the depth of the engraving can be changed above and below the reference value to obtain a different value code. The amount is obtained. Further, when the information amount is equal to that of the conventional barcode, the size (length direction) occupied by the barcode can be reduced.

The magnetic pattern recognizing method according to the present invention is a magnetic pattern recognizing method in which a code of product management information is provided in a place that cannot be seen from the outside, such as inside a product, and the code is read from outside the product. A) affixing a label engraved on the inside of the product housing or engraving a code on the inside of the product housing, a step 2 of applying a static magnetic field from the front side of the product housing, and Step 3 for interrupting the magnetic field, Step 4 for calculating a change in the time constant from the attenuation characteristics of the residual magnetic flux density that differs depending on the presence or absence or shape of the code, and Step 5 for recognizing the code from the change in the time constant Features.

According to the magnetic pattern recognition method of the present invention,
Affixing the label engraved with the code to the inside of the product casing or engraving the code on the inside of the product casing; and applying a static magnetic field from the front side of the product casing; Step 3 for interrupting the static magnetic field, Step 4 for calculating a change in the time constant from the attenuation characteristic of the residual magnetic flux density that differs depending on the presence or absence or shape of the code, and Step 5 for recognizing the code from the change in the time constant Since the attenuation characteristics of the magnetic flux density differ depending on the presence or absence or shape of the label or the code engraved on the inside of the housing, by calculating the change in the time constant from the attenuation characteristics of the residual magnetic flux density,
Since the code can be recognized, the information management from the time of production to after shipping can be centralized without impairing the aesthetics of the product, and it can also be applied to a POS (Point Of Sale) system. Therefore, efficiency of information management can be improved, and convenience can be improved.

Further, in the magnetic pattern recognition method according to the present invention, a step of affixing a label engraved with a code to the inside of the product casing or engraving the code on the inside of the product casing, The method includes a step 2 of applying a static magnetic field from the front side of the housing, and a step 3 of recognizing the code from the magnitude of the leakage magnetic flux density that differs depending on the presence or absence or shape of the code.

The magnetic pattern recognition method according to the present invention comprises:
Affixing the label engraved with the code to the inside of the product casing or engraving the code on the inside of the product casing; and applying a static magnetic field from the front side of the product casing; Step 3 of recognizing the code from the magnitude of the leakage magnetic flux density that differs depending on the presence or absence or shape of the code. Since the magnitude of the leakage magnetic flux density varies depending on the presence or absence or shape of the code imprinted on the label or inside the housing, Since the code can be recognized from the magnitude of the leakage magnetic flux density, it is possible to unify information management from the time of product production to the time of shipment without deteriorating the aesthetics of the product, and a POS (Point Of Sale) system Therefore, the efficiency of information management can be improved, and the convenience can be improved.

Also, the magnetic pattern recognition method according to the present invention comprises the steps of: affixing a label engraved with a code to the inside of a product casing or engraving a code on the inside of a product casing; The method includes a step 2 of applying an AC magnetic field from the front side of the housing and a step 3 of recognizing the code from an amount corresponding to an eddy current that differs depending on the presence or absence or shape of the code.

According to the magnetic pattern recognition method of the present invention,
Affixing the label engraved with the code to the inside of the product casing or engraving the code on the inside of the product casing; and applying an AC magnetic field from the front side of the product casing; A step of recognizing the code from the amount corresponding to the eddy current which differs depending on the presence or absence or the shape of the code, wherein the amount corresponding to the eddy current (for example, induced voltage, etc.) of the code imprinted on the label or inside of the housing is provided. Since it differs depending on the presence or absence or shape, the code can be recognized from the amount corresponding to the eddy current, so that information management from the time of product production to after shipping can be unified without impairing the beauty of the product, Since the present invention can also be applied to a POS (Point Of Sale) system, it is possible to improve the efficiency of information management and improve convenience.

[0026]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an image diagram of a measuring system according to an embodiment of the magnetic pattern recognition device according to the present invention. In FIG. 1, a magnetic pattern recognition device 1 includes a magnetic code reader 2 having a magnetic sensor array 4 and a controller 3 and is attached to the back side of a housing 6 of a product or the like, and a pattern (pattern) such as a bar code 5A is formed. The engraved label 5 is magnetically read by the magnetic code reader 2 from the surface side of the housing 6 such as a product, and the read barcode 5A is analyzed and collated by the controller 3, and then the product etc. of the housing 6 is specified. .

FIG. 2 is a block diagram of one embodiment of a magnetic code reader according to the present invention. In FIG. 2, a magnetic code reader 2 includes a magnetic sensor array 4 in which a plurality of magnetic sensors are arranged, an exciting magnet 7 for exciting a target label 5, an exciting coil 8 for exciting the exciting magnet 7, and a coil for the exciting coil 8. A DC power supply 9 for supplying a current and a switch 10 for turning on / off the DC power supply 9 are provided.

A label 5 having a pattern (pattern) such as a bar code 5A is attached to the back of the magnetic detection surface on which the exciting magnet 7 and the magnetic sensor array 4 of the magnetic code reader 2 are arranged in the same plane. When the switch 10 is turned on, the DC coil current flows from the DC power supply 9 to the exciting coil 8 and the exciting coil 8 is turned on.
The excitation magnet 7 is magnetized by the magnetic flux generated from.

A static magnetic field is generated from the magnetized excitation magnet 7 to excite the housing 6 and the label 5. At this time, the exciting magnet 7, the housing 6, and the label 5 magnetically form a closed circuit, and the magnetic flux φ flows. The magnetic sensor array 4 detects the magnetic flux φ by magnetic-electric conversion of an amount (for example, induced voltage or the like) corresponding to the magnetic flux density, the leakage magnetic flux density, or the eddy current.

When the switch 10 is turned off and the DC power supply 9 is turned off from the state in which the housing 6 and the label 5 are excited by a static magnetic field, the magnetic flux (residual magnetic flux)
Indicates a transient response characteristic that attenuates with time.

The magnetic code reader 2 magnetically detects a transient response characteristic such as a magnetic flux density of a residual magnetic flux φ of the label 5, a leakage magnetic flux density, and a magnetic flux density caused by an eddy current by using the sensor array 4, thereby detecting the label. 5 can be recognized such as a barcode pattern (pattern = barcode 5A).

FIG. 3 is a block diagram showing an embodiment of a bar code according to the present invention. (A) shows the bar code marking surface (front surface) of the label, and (b) shows the adhesive surface (back surface) of the label 5. (A) As shown in the figure, a bar code 5A is formed by a pattern of concavities and convexities imprinted on the surface of a conductive or magnetic label 5. The barcode 5A is formed by a pattern in the longitudinal direction of the groove (concave) portion and the surface (convex) portion. The groove (concave) portion corresponds to, for example, a black print portion of a normal barcode, and the surface (convex). The part corresponds to a white printing part of a normal barcode. The barcode is, for example, JAN (Japan Articl)
e Number) code.

Further, as shown in FIG. 3B, an adhesive surface 5B is provided on the back surface (back surface) of the label 5, and the adhesive surface 5B is adhered to the inside of the housing 6 of the product or the like so as to be visible from the surface of the product or the like. No bar code 5A. Since the bonding surface 5B is flat,
The bonding area can be increased, and a strong bonding force can be obtained.

FIG. 4 shows an embodiment in which the bar code according to the present invention is directly engraved on the inside of the housing. A bar code 5A is directly engraved on a conductive or magnetic plate constituting the housing 6,
When assembling the housing 6, the barcode 5 </ b> A is located on the inner side surface of the housing 6.

FIG. 5 is a block diagram of an embodiment of a magnetic code reader according to the present invention. (A) A configuration example in which the S pole and the N pole of the excitation magnet are arranged at both ends in the longitudinal direction of the magnetic sensor array in FIG.
(B) shows a configuration example in which the S and N poles of the exciting magnet are arranged in the same direction as the element arrangement of the magnetic sensor array, and (c) shows a configuration example in which the bar code reader is slid to scan a bar code. .

In FIGS. 5A to 5C, any of the magnetic code readers shown in FIGS. 5A to 5C employs a bar code 5A stamped on the front surface of the label 5 adhered to the inside of the housing 6 and the back surface (back surface) of the label 5. ) Can be read from the side. The configuration shown in FIGS. 5A and 5B reads the bar code 5A without moving the magnetic code reader, and the configuration shown in FIG. 5C reads by sliding the magnetic code reader along the bar code 5A. The bar code 5A is the label 5
It can also be read from the surface (marked surface).

In any of the magnetic code readers shown in FIGS. 7A to 7C, when the label 5 is adhered to the inside of the housing 6, the bar code 5A is applied from the surface of the housing 6. The bar code 5 on the surface of the housing 6
Attach a product nameplate or the like to the position corresponding to A, and make efforts to ensure that the bar code 5A can be read with a magnetic code reader. Although the magnetic code reader having the configuration shown in FIG. 3C needs to be slid along the bar code 5A, the size of the exciting magnet 7 and the magnetic sensor 4A can be reduced. Can be achieved.

FIG. 6 is an explanatory diagram of the marking pattern (bar code) recognition of the magnetic pattern recognition device according to the present invention.
(A) When there is no marking pattern in the figure, (b) when the marking is deep in the figure, and (c) when the marking is shallow in the figure, the magnetic flux φ, the leakage magnetic flux φL, or the time constant corresponding to the magnetic sensors Sa to Sb. The relationship of τ is shown.

In FIG. 5A, since the label 5 has no engraving pattern (bar code 5A), the magnetic flux φ is uniformly distributed in the label 5 and the distance from the counter electrode (S pole or N pole) of the exciting magnet is increased. A magnetic path having a corresponding magnetic path length is formed. That is, the position of each sensor of the magnetic sensor array 4 is changed from Sb to S
The magnetic path length increases with distance from the counter electrode a. When the static magnetic field being applied is cut off from this state, the residual magnetic flux in the label 5 attenuates as time passes. Assuming that the time constant of this damping characteristic is τ, the time constant τ monotonically increases and becomes a large value according to the position of each of the magnetic sensors Sb to Sa.

In FIG. 5B, the label 5 has a relatively deep groove 5D, and the magnetic path is distorted by the groove 5D. Therefore, the magnetic path is longer than the magnetic path length corresponding to the distance from the counter electrode (S pole or N pole) of the exciting magnet. A magnetic path having a longer magnetic path length is formed. Label 5
The magnetic field passing through the inside of the groove 5D bypasses the groove 5D.
In addition to requiring a longer magnetic path length than without D,
This indicates that the magnetic field leaking from the groove 5D becomes the leakage magnetic flux φL and requires a longer magnetic path length than when passing through the label 5. In this case, the time constant τ detected by each magnetic sensor of the magnetic sensor array 4 shows a large value in the magnetic sensor that detects the magnetic field bypassing the groove 5D and the magnetic sensor that detects the leakage magnetic flux density φL.

In FIG. 5C, the label 5 has a relatively shallow groove 5D, the magnetic field bypassing the groove 5D is small, and the distribution of the time constant τ shows only the influence of the leakage magnetic flux φL.

FIG. 7 is an explanatory diagram of an engraved pattern (bar code) recognition by magnetic flux detection of the magnetic pattern recognition device according to the present invention. By exciting the exciting magnet 7 with an AC magnetic field using the AC power supply 11 and detecting the AC magnetic flux φ (magnetic flux density) generated on the label 5, the bar code 5 </ b> A engraved on the label 5 is engraved on the engraved surface (surface) or Recognize from the back (back). Note that the detected AC magnetic flux φ (magnetic flux density) includes a leakage magnetic flux φL or a magnetic flux (magnetic flux density) generated due to an eddy current generated on the surface of the label 5.

(A) When the bar code 5A is not present on the label 5 in FIG. 5, (b) When the label 5 has the bar code 5A having a relatively deep groove, and when the magnetic sensor array 4 detects the bar code 5A from the back, (C) The label 5 has a bar code 5A with a relatively shallow groove on the label 5, and the label 5 has a bar code 5A with a relatively deep groove on the label 5 when detected from the back by the magnetic sensor array 4. , The case where the magnetic sensor array 4 detects from the marking surface (front surface).

In contrast to the diagram (a) in which the alternating magnetic flux φ (magnetic flux density) in the label 5 is uniform, the bar code 5A of the relatively deep groove shown in the diagram (b) shows that the alternating magnetic flux φ
(Magnetic flux density) becomes very large, so that the magnetic sensor array 4 detects the AC magnetic flux φ (magnetic flux density) and
The pattern of A can be recognized.

Further, when there is a bar code 5A having a relatively shallow groove shown in FIG.
(Magnetic flux density) becomes relatively large, so that the magnetic sensor array 4 detects the AC magnetic flux φ (magnetic flux density) and
The pattern of A can be recognized.

Further, the bar code 5A shown in FIG. 5B is detected from the marking surface (surface) by the magnetic sensor array 4 and the bar code 5A is detected by detecting the leakage magnetic flux φL in the groove in the case shown in FIG. Can be recognized.

The bar code 5A engraved on the label 5 has different AC magnetic flux φ (magnetic flux density) depending on the depth of the engraved groove.
Can be detected. Further, the barcode 5A can be recognized from the engraved surface (front surface) or the back surface (back surface) of the label 5.

As described above, the pattern (pattern) according to the present invention can be formed by imprinting the barcode 5A such as a JAN (Japan Article Number) code and recognizing the pattern (pattern) from the engraved surface or the back surface of the barcode 5A. In addition, the existing barcode system can be used, the barcode reading direction is less restricted, and the operability of the barcode reader (recognition device) 2 can be improved.

FIG. 8 is a block diagram showing another embodiment of the barcode according to the present invention. In FIG. 8, the bar code 5A
Gives information also to the depth of the groove 5D. As for the depth of the groove 5D, a groove having a reference value DK is provided in the depth direction, and the other grooves are formed deeper or shallower than the reference value DK.

By setting a reference value DK in the depth direction in the groove (concave) portion 5D of the bar code 5A and forming a groove deeper or shallower than the reference value DK, two types of information in the depth direction can be obtained. can get.

As described above, according to the bar code 5 of the present invention,
A gives information in the depth direction of the groove engraved on the label 5 and sets the reference value DK in the depth direction of the groove. By setting the depth of the engraving above and below the reference value DK, Even if the bar code 5A has the same width as the unevenness (5D, 5C), the depth of the engraving can be made higher and lower than the reference value DK so that the code can have different values. can get. Further, when the information amount is equal to that of the conventional barcode, the size (length direction) occupied by the barcode can be reduced.

Next, a magnetic pattern recognition method according to the present invention will be described. The magnetic pattern recognition method according to the present invention provides a product management information code in a place that is invisible, such as inside a product, and reads the code from the outside of the product. The management can be centralized and applied to a POS (Point Of Sale) system.

FIG. 9 is a flow chart of a first embodiment of the magnetic pattern recognition method according to the present invention. In FIG. 9, first, in step S1A, a label engraved with an uneven code such as a bar code is attached to the inside of the invisible product housing or the like. Alternatively, as in step S1B, a concavo-convex code such as a bar code is directly imprinted on the inside of the invisible product housing or the like.

In step S2, a static magnetic field is applied from the front side of the product housing. In step S3, the applied static magnetic field is shut off.

Subsequently, in step S4, since the attenuation characteristic of the residual magnetic flux density differs depending on the presence or absence or the shape of the imprinted code, a change in the time constant is calculated from the attenuation characteristic of the residual magnetic flux density. The change in the time constant corresponds to the attenuation characteristic of the residual magnetic flux density.

Finally, in step S5, a code (bar code) is recognized from the change in the time constant, and information on the product is obtained.

FIG. 10 is a flowchart of a second embodiment of the magnetic pattern recognition method according to the present invention. In FIG. 10, first, in step T1A, a label engraved with an uneven code such as a bar code is attached to the inside of the invisible product housing or the like. Alternatively, as in step T1B, an uneven code such as a bar code is directly imprinted on the inside of the invisible product housing or the like. Steps T1A and T1B are the same as steps S1A and S1B in the flowchart shown in FIG.

Subsequently, in step T2, a static magnetic field is applied from the front side of the product housing. Finally, in step T3,
Since the magnitude of the leakage magnetic flux density differs depending on the presence or absence or the shape of the imprinted code, the code (bar code) is recognized based on the magnitude of the leakage magnetic flux density, and product information can be obtained. In the second embodiment and the first embodiment shown in FIG. 9, the first embodiment applies a static magnetic field and then shuts off the static magnetic field, whereas the second embodiment applies a static magnetic field. The difference is that the application is continued.

FIG. 11 is a flowchart of a third embodiment of the magnetic pattern recognition method according to the present invention. In FIG. 11, first, in step P1A, a label engraved with an uneven code such as a bar code is affixed to the inside of the invisible product housing or the like. Alternatively, as in step P1B, an uneven code such as a bar code is directly imprinted on the inside of the invisible product housing or the like. Steps P1A and P1B are the same as steps S1A and S1B in the flowchart shown in FIG.

Subsequently, in Step P2, an AC magnetic field is applied from the front side of the product housing. By applying an AC magnetic field, an eddy current is generated in the housing and the label.

Finally, in Step P3, since the generated eddy current differs depending on the presence or absence or shape of the cord,
Since an amount corresponding to the eddy current (for example, an induced voltage or the like which is a detection output of the magnetic sensor) is also different, a code (bar code) is recognized from the amount corresponding to the eddy current, and product information is obtained.

As described above, according to the magnetic pattern recognition method of the present invention, a label on which a code such as a bar code is engraved is adhered to the inside of the product housing, or the code is directly engraved on the surface of the product housing. From the residual magnetic flux density by interrupting the static magnetic field after applying the static magnetic field, the magnitude of the leakage magnetic flux density by continuing to apply the static magnetic field, or the amount corresponding to the eddy current by applying the AC magnetic field, The code (barcode) can be recognized by focusing on the fact that it differs depending on the presence or absence or shape of the code.

By recognizing the code (barcode) inside the product housing, it is possible to unify information management from the time of production of the product to the time after shipment without impairing the beauty of the product.
Since the present invention can also be applied to a POS (Point Of Sale) system, the efficiency of information management can be improved, and the convenience can be improved.

[0064]

As described above, the magnetic pattern recognition device according to the present invention shuts off the static magnetic field after applying the static magnetic field, so that the residual magnetic flux (magnetic flux density) of the conductor attenuates with time. Since the damping characteristics (transient response characteristics) differ depending on the presence or absence or shape of the imprinted pattern (pattern), the transient response characteristics (damping characteristics) of the magnetic flux density must be detected and the time constant calculated as numerical data. Can recognize the pattern (pattern) from the change of the time constant, so that the label of the engraved pattern (pattern) can be attached to the back side of the product or directly engraved, so that the product information can be recognized. Because it can be recognized, information management after product production and after shipment can be centralized without impairing the beauty of the product, and information management can be streamlined and convenient. It is possible to improve the.

Further, the magnetic pattern recognition device according to the present invention detects the magnitude of the leakage magnetic flux density that differs depending on the presence or absence or the shape of the pattern (pattern) imprinted on the magnetic material,
Since it is possible to recognize the pattern of the leakage magnetic flux density peculiar to the engraved pattern (pattern), by attaching a label coded with the engraved pattern (pattern) on the back side of the product, or by directly engraving, Product information can be recognized, so that information management after product production and after shipment can be unified, without compromising the aesthetics of the product, thereby improving the efficiency of information management and improving convenience. Can be.

Further, the magnetic pattern recognition device according to the present invention detects an amount (for example, induced voltage or the like) corresponding to an eddy current generated by an AC magnetic field applied to the conductor, and detects the imprinted pattern (pattern). Can recognize the amount of pattern corresponding to the eddy current peculiar to the product. By attaching a label that encodes the engraved pattern (pattern) on the back side of the product or directly engraving it, the product information can be recognized. Since it is possible to recognize the information, it is possible to unify information management from the time of production of the product to after shipping without impairing the aesthetics of the product, thereby improving the efficiency of information management and improving convenience.

Further, in the magnetic pattern recognition method according to the present invention, a step of affixing a label engraved with a code to the inside of the product casing or engraving the code on the inside of the product casing comprises the steps of: Step 2 of applying a static magnetic field from the front side of the housing, Step 3 of shutting off the static magnetic field, Step 4 of calculating the change of the time constant from the attenuation characteristics of the residual magnetic flux density that differs depending on the presence or absence or shape of the cord, And step 5 of recognizing the code from the change of the constant. Since the attenuation characteristic of the residual magnetic flux density differs depending on the presence or absence or the shape of the code imprinted on the inside of the label or the housing, the time constant of the time constant is determined from the attenuation characteristic of the residual magnetic flux density. By calculating the change, the code can be recognized, so that the information management from the time of product production to the time after shipment is unified without compromising the beauty of the product Can, also, POS (Point Of Sal
e) Since the present invention can be applied to a system, information management can be made more efficient and convenience can be improved.

Further, in the magnetic pattern recognition method according to the present invention, the step of attaching a label engraved with a code to the inside of the product casing or engraving the code on the inside of the product casing includes the steps of: A step of applying a static magnetic field from the front side of the housing; and a step of recognizing the code from the magnitude of the leakage magnetic flux density which differs depending on the presence or absence or shape of the code. It depends on the presence or absence or shape of the code imprinted on the inside of the product, so it is possible to recognize the code from the magnitude of the leakage magnetic flux density. It can be unified and can be applied to POS (Point Of Sale) system, which can improve the efficiency of information management and improve convenience. Wear.

Further, the magnetic pattern recognition method according to the present invention comprises the steps of: affixing a label engraved with a code to the inside of a product casing or engraving a code on the inside of a product casing; The method includes a step 2 for applying an AC magnetic field from the front side of the housing and a step 3 for recognizing a code from an amount corresponding to an eddy current that differs depending on the presence or absence or shape of the code. Etc.) differs depending on the presence or absence or shape of the code imprinted on the inside of the label or the housing, so that the code can be recognized from the amount corresponding to the eddy current, so that it does not impair the aesthetic appearance of the product during production From POS (Point Of Sal).
e) Since the present invention can be applied to a system, information management can be made more efficient and convenience can be improved.

[Brief description of the drawings]

FIG. 1 is an image diagram of a measurement system according to an embodiment of a magnetic pattern recognition device according to the present invention.

FIG. 2 is a configuration diagram of an embodiment of a magnetic code reader according to the present invention.

FIG. 3 is a configuration diagram of an embodiment of a barcode according to the present invention.

FIG. 4 is an embodiment in which a barcode according to the present invention is directly engraved on the inside of a housing.

FIG. 5 is a configuration diagram of an embodiment of a magnetic code reader according to the present invention.

FIG. 6 is an explanatory diagram of engraved pattern (barcode) recognition by the magnetic pattern recognition device according to the present invention.

FIG. 7 is an explanatory diagram of engraved pattern (bar code) recognition by magnetic flux detection of the magnetic pattern recognition device according to the present invention.

FIG. 8 is a block diagram showing another embodiment of the barcode according to the present invention.

FIG. 9 is a flow chart of a first embodiment of a magnetic pattern recognition method according to the present invention;

FIG. 10 shows a second example of the magnetic pattern recognition method according to the present invention.
Embodiment flow chart

FIG. 11 shows a third example of the magnetic pattern recognition method according to the present invention.
Embodiment flow chart

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic pattern recognition apparatus 2 Magnetic code reader 3 Controller 4 Magnetic sensor array 4A Magnetic sensor 5 Label 5A Barcode (engraved) 5B Adhesive surface 5C Flat part 5D groove part 6 Housing 7 Exciting magnet 8 Exciting coil 9 DC power supply 10 Switch 11 AC Power supply

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 5B035 AA00 AA07 BA04 BB01 BC00 5B072 AA00 BB10 CC01 CC24 DD04 JJ01 JJ11 MM02

Claims (10)

[Claims] 1. A method in which a static magnetic field is applied to a conductor on which a pattern (pattern) is impressed to excite the conductor, the static magnetic field is cut off, and a change of a time constant is calculated from a transient response characteristic of a magnetic flux density to calculate the pattern (pattern). A magnetic pattern recognition device characterized by recognizing a pattern. 2. A magnetic pattern recognition apparatus characterized in that a static magnetic field is applied to a magnetic body on which a pattern (pattern) is imprinted, and the pattern (pattern) is recognized based on the magnitude of magnetic flux density leaking from the magnetic body. . 3. A magnetic pattern recognition method comprising: applying an alternating magnetic field to a conductor on which a pattern (pattern) is imprinted; and recognizing the pattern (pattern) from an amount corresponding to an eddy current generated in the conductor. apparatus. 4. The pattern (pattern) of the conductor or the magnetic material, wherein the pattern (pattern) is recognized from a marking surface or a back surface of the pattern (pattern).
The magnetic pattern recognition device according to claim 2 or 3. 5. The magnetic pattern recognition device according to claim 4, wherein the pattern is a bar code formed by asperities imprinted on the conductor or the magnetic material. 6. The magnetic pattern recognition device according to claim 5, wherein the bar code has information also in a depth direction of a groove engraved on the conductor or the magnetic body. 7. The magnetic pattern recognition device according to claim 6, wherein the bar code sets a reference value in a depth direction of a groove engraved on the conductor or the magnetic body. 8. A magnetic pattern recognition method in which a code for product management information is provided in an invisible place such as the inside of a product, and the code is read from the outside of the product. Step 1 of attaching to the inside or engraving a code on the inside of the product casing, and Step 2 of applying a static magnetic field from the front side of the product casing
Step 3 of interrupting the static magnetic field, Step 4 of calculating the change of the time constant from the attenuation characteristic of the residual magnetic flux density that differs depending on the presence or absence or shape of the code, and Step 5 of recognizing the code from the change of the time constant. A magnetic pattern recognition method, comprising: 9. A magnetic pattern recognition method in which a code for product management information is provided in a place invisible from the outside, such as inside a product, and the code is read from the outside of the product. Step 1 of attaching to the inside or engraving a code on the inside of the product casing, and Step 2 of applying a static magnetic field from the front side of the product casing
And a step (3) of recognizing the code from the magnitude of the leakage magnetic flux density that differs depending on the presence or absence or shape of the code. 10. A magnetic pattern recognition method in which a code for product management information is provided in a place invisible from the outside, such as inside a product, and the code is read from the outside of the product. Step 1 of attaching to the inside or engraving a code on the inside of the product casing, and Step 2 of applying an AC magnetic field from the front side of the product casing
And a step of recognizing the code from an amount corresponding to an eddy current that differs depending on the presence or absence or shape of the code.