JP2008032538A - Magnetic substance detection device, entering/outgoing detection device, and its detection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic substance detection device, an entering/outgoing detection device, and its detection method capable of detecting both existence of the magnetic substance and its passing direction, when a medium to which the magnetic substance is added passes a gate. <P>SOLUTION: This magnetic substance detection device includes an excitation coil for generating magnetization reversal in the magnetic substance, and generating an alternating field for generating a magnetic pulse from the magnetic substance at the magnetization reversal time; a plurality of detection coils disposed with a prescribed position relation corresponding to a magnetic coil, for detecting respectively the magnetic pulse generated from the magnetic substance; and a discrimination means for discriminating the passing direction of a moving body to which the magnetic substance is added based on each detection output from the plurality of detection coils. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a magnetic body detection device, an entrance / exit detection device, and a detection method thereof, and in particular, when a medium provided with a magnetic body passes through a gate, both the detection of the magnetic body and the passing direction are detected. The present invention relates to a magnetic body detection device, an entrance / exit detection device, and a detection method thereof.

  In recent years, an IC card equipped with an IC chip and a reader / writer as a technology of a detection element that detects non-contact and its detection device and a reader / writer thereof have become widespread, and in particular, an RFID (= Radio Frequency IDentification) non-contact IC card Widely used.

  The information stored in the non-contact type IC card is read and transmitted by the reader / writer when the information is transmitted / received via the loop antennas respectively provided in the non-contact type IC card and the reader / writer. Can read the information of the non-contact type IC card in a non-contact manner even when the non-contact type IC card is located several cm to several tens of cm away from the reader / writer.

  Non-contact type IC cards are used in various fields such as entrance / exit management, factory production management, and distribution management because they are resistant to dirt and static electricity.

  In addition, a non-contact detection element and a magnetic element that causes a large Barghausen effect are applied to the product as an application technology of the detection apparatus, and the detection apparatus of the magnetic element is installed at the gate so that the detection apparatus passes through the gate. There is also provided an apparatus for detecting a magnetic element attached to a product and preventing the product from being stolen.

  Magnetic elements that cause the large Barghausen effect are characterized by steep magnetization reversal when subjected to an alternating magnetic field that exceeds the coercive force. Therefore, an alternating magnetic field is generated by an exciting coil and applied to the magnetic element, and the magnetic element reverses magnetization. The presence of a magnetic element can be detected by detecting a steep magnetic pulse that is sometimes generated by a pulse current flowing in a detection coil arranged in the vicinity of the magnetic element.

  For example, Patent Document 1 proposes a document management apparatus that manages a document by printing the document on a sheet containing a magnetic material that causes a large Barkhausen effect.

  The proposal in Patent Document 1 gives an alternating magnetic field to a document printed on a sheet containing a magnetic material that causes a large Barkhausen effect, and is specific to the document based on a detection value of a magnetic field change due to the large Barkhausen effect caused by the magnetic material. It is configured to manage information by detecting information.

  Patent Document 2 proposes a checkout system for paying for a product using a product label provided with a control magnetic material plated on a magnetic wire that causes the large Barghausen effect.

In the proposal of the above-mentioned Patent Document 2, a control magnetic body plated on a magnetic thin wire that causes a large Barghausen effect is applied to a product label, and a bar code reading unit that reads a bar code and a control magnetic body are magnetized. A terminal with a barcode reader equipped with a magnetic field generator that can be used is installed in the cart, displays the total price of the product label read by the barcode reader, magnetizes the control magnetic body, and the product label at the detection gate The exit gate is locked when the control magnetic body tries to pass in an unmagnetized state, and the amount sent from the terminal is received by the automatic payment machine and settled with cash or a prepaid card It has been done.
JP 2004-285524 A JP 09-27088 A

  However, both of Patent Document 1 and Patent Document 2 detect a steep magnetic pulse generated when a magnetic material (magnetic wire or magnetic material) causing a large Barkhausen effect applied to a medium receives an alternating magnetic field and reverses magnetization. It is configured to detect information specific to the medium, such as whether it is an unsettled medium depending on the presence or absence, and when the medium to which the magnetic material is applied passes through the gate, the detection and passing direction of the magnetic material No proposal has been made for a device that detects both of the above.

  Therefore, the present invention provides a magnetic body detection device, an entrance / exit detection device, and a detection method thereof that detect both the detection of the magnetic body and the passing direction when the medium to which the magnetic body is applied passes through the gate. The purpose is to do.

  In order to achieve the above object, an invention of a magnetic body detection device according to claim 1 includes an exciting coil that generates an alternating magnetic field that causes magnetization reversal in a magnetic body and generates a magnetic pulse from the magnetic body when the magnetization is reversed. A plurality of detection coils that are arranged in a predetermined positional relationship corresponding to the magnetic coil and detect magnetic pulses generated from the magnetic body, and the magnetic body is applied based on detection outputs of the plurality of detection coils. And determining means for determining the passing direction of the moving body.

  According to a second aspect of the present invention, there is provided the magnetic body detection device according to the first aspect, wherein the plurality of detection coils are arranged at a predetermined distance apart along a movement path of the movable body. A time information generating means for generating time information; and a detecting means for detecting time information generated by the time information generating means when the detection coil detects the magnetic pulse. The passing direction of the moving body provided with the magnetic body in the moving path is determined based on the order of the time information.

  The entrance / exit detection device according to claim 3 is provided at an entrance / exit of a predetermined space, and generates an alternating magnetic field that causes magnetization reversal in the magnetic material and generates a magnetic pulse from the magnetic material at the time of the magnetization reversal. An excitation coil, a plurality of detection coils arranged in a predetermined positional relationship corresponding to the magnetic coil and detecting magnetic pulses generated from the magnetic body, and the magnetic based on detection outputs of the plurality of detection coils A magnetic body detection device that detects a moving direction of the moving body to the space based on a determination result of the determination means, and a magnetic body detection device. And a counting means for counting the number of the moving bodies in the space based on the detection output of the apparatus.

  According to a fourth aspect of the present invention, there is provided a magnetic body detection method in which an alternating magnetic field generated by an exciting coil is applied to a magnetic body to cause magnetization reversal in the magnetic body, and a magnetic pulse generated from the magnetic body at the time of the magnetization reversal. Is detected by a plurality of detection coils arranged in a predetermined positional relationship corresponding to the magnetic coil, and the passing direction of the moving body to which the magnetic body is applied is determined based on the detection output of the plurality of detection coils. It is characterized by discriminating by means.

  The entrance / exit detection device according to claim 5 is arranged such that the plurality of detection coils are spaced apart from each other by a predetermined distance along the movement path of the moving body, and the determination means is a time information generation means. Information is generated, time information generated by the time information generation means at the time when the detection coil detects the magnetic pulse is detected by the detection means, and the magnetic information is based on the order of the time information detected by the detection means. It is characterized in that the passing direction of the moving body provided with the body in the moving path is determined.

  According to the magnetic body detection device, the entrance / exit detection device, and the detection method thereof according to the present invention, it is possible to detect when the magnetic body moving through the detection gate passes through the detection gate and the direction of the passage, so that the visitors can Carry the magnetic material to the entrance of the venue and let the visitors pass through the detection gate of the magnetic detection device installed at the entrance of the venue, the magnetic material that the visitor carries every time the detection gate passes, and its By acquiring each detection result in the passing direction, a desired number such as the number of people passing through the detection gate, the number of visitors, the number of people leaving, and the like can be totaled and output.

  In addition, there is an effect that the number of visitors at an arbitrary time can be grasped by acquiring in real time the magnetic material carried by the visitor every time the detection gate passes and the respective detection results in the passing direction.

  Hereinafter, an embodiment of a magnetic body detection device, an entrance / exit detection device and a detection method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing an example of an entrance / exit detection device 100 to which a magnetic body detection device of the present invention is applied.

  As shown in FIG. 1, the entrance / exit detection device 100 includes a detection gate 1 (a portion surrounded by a broken line), a detection gate 3 (a portion surrounded by a broken line), A gate controller 2 for controlling the gate 1; a gate controller 4 for controlling the detection gate 3; and various aggregation processes such as the total number of visitors based on the entrance / exit information of the visitors 6 passing through the gates output from the gate controllers; It is comprised with the counting device 5 which outputs the result.

  In addition, a visitor 6 at the venue 9 carries a pre-distributed admission ticket 7 and passes through the detection gate 1 or the detection gate 3 to enter the venue 9 or leave the venue 9. The certificate 7 is a paper-like name tag in which a magnetic wire 8 that causes a large Barkhausen effect is embedded. The name of the visitor 6 is printed on the surface of the entrance certificate 7.

  In addition, the admission card 7 is provided with a string, and the visitor 6 can carry the admission card 7 with the string on his neck.

  Coils are embedded in the detection gate 1 and the detection gate 3 installed at the entrances and exits of the venue 9, and each time the visitor 6 passes through each detection gate via these coils, the visitor 6 carries it. It is comprised so that the magnetic wire 8 of the entrance certificate 7 to be detected may be detected.

  Each gate controller detects the magnetic wire 8 of the admission card 7 carried by the visitor 6 every time the visitor 6 passes through the detection gate controlled by each gate controller, and according to the detection result of the visitor 6 An entry / exit is detected and the detection result (entry / exit information) is transmitted to the counting device 5.

  The counting device 5 counts and outputs a desired number of visitors such as the total number of visitors, the number of visitors at any time, and the number of visitors based on the entrance / exit information of the visitors 6 transmitted from each gate controller. It is configured.

  The magnetic substance detection device according to the present invention includes a detection gate 1 and a gate controller 2 that controls the detection gate 1 or a detection gate 3 and a gate controller 4 that controls the detection gate 3. The detection gate 3, the gate controller 2, and the gate controller 4 are similarly configured.

  FIG. 2 is a block diagram showing a configuration of a main part of each detection gate constituting the entrance / exit detection device 100 and a gate controller for controlling each detection gate.

  FIG. 2 shows the configuration of the main parts of the detection gate 1 and the gate controller 2, and the detection gate 3 and the gate controller 4 are explained in the same manner as the detection gate 1 as described above. Since the gate controller 4 is configured in the same manner as the gate controller 2, it is omitted for convenience of explanation.

  As shown in FIG. 2, the detection gate 1 includes an excitation coil 30 for applying an alternating magnetic field to the magnetic wire 8 of the admission card 7 carried by the visitor 6 when passing through the detection gate 1, and a magnetic wire that has received the alternating magnetic field. Detecting coil 31 for receiving a magnetic pulse generated when magnetization reversal 8, a plate 1 a formed by embedding the detecting coil 32, and a plate 1 b (not shown) configured similarly to the plate 1 a are attended. 6 are opposed to each other in a direction substantially perpendicular to the traveling direction of 6 and are arranged so as to allow visitors 6 to pass therethrough.

  The detection coil 31 and the detection coil 32 are arranged in an 8-shaped shape so that an induced current does not flow through the detection coils 31 and 32 due to electromagnetic induction of an alternating magnetic field transmitted from the excitation coil 30.

  In addition, the detection coil 31 and the detection coil 32 are formed smaller than the excitation coil 30, and when the visitor 6 moves through the detection gate 1, the magnetic wire of the admission card 7 carried by the visitor 6 is provided. A magnetic pulse generated when the magnetic reversal 8 receives an alternating magnetic field and reversal of magnetization is detected first by either an A detection unit 21 described later connected to the detection coil 31 or a B detection unit 22 described later connected to the detection coil 32. Further, the detection coil 31 and the detection coil 32 are arranged at a predetermined interval in the traveling direction of the visitor 6.

  For example, in FIG. 2, when the visitor 6 passes the detection gate 1 in the traveling direction of the arrow 33, the magnetic wire 8 of the entrance certificate 7 carried by the visitor 6 receives an alternating magnetic field transmitted from the excitation coil 30. Magnetization reversal, and a steep magnetic pulse emitted from the magnetic wire 8 at that time causes a large induced current to flow in the detection coil 31 and the detection coil 32 closer to the magnetic wire 8, and according to the current value. An output detection signal is detected.

  Therefore, by comparing the output of the detection signal corresponding to the magnitude of the induced current flowing through each detection coil, the visitor 6 passes from any detection coil side of the detection coil arranged at the detection gate to any detection coil side. Can be detected.

  The plate 1a and the plate 1b are made of a material that does not affect an alternating magnetic field or a magnetic field change of a magnetic pulse generated when the magnetization of the magnetic wire 8 is reversed.

  The detection gate 1 may be configured such that only the excitation coil 30 is arranged on one plate 1a and the detection coil 31 and the detection coil 32 are arranged on the other plate 1b, or the excitation coil 30 is arranged on one plate 1a. It is good also as a structure which arrange | positions the detection coil 31 and arrange | positions the excitation coil 30 and the detection coil 32 to the other board 1b.

  The gate controller 2 detects the alternating magnetic field generator 20 that performs control to generate a predetermined alternating magnetic field via the excitation coil 30 embedded in the detection gate 1 and the magnetic wire 8 of the admission card 7 carried by the visitor 6. An A detection unit 21 that detects an abrupt magnetic pulse generated upon reversal of magnetization by receiving an alternating magnetic field when passing through the gate 1 through the detection coil 31, a B detection unit 22 that detects through the detection coil 32, and an alternating magnetic field generation unit 20, a timing control unit 23 that performs timing control of the A detection unit 21 and the B detection unit 22, a clock generation unit 25 that generates a clock signal, and detection signals detected by the A detection unit 21 and the B detection unit 22, respectively. Based on the clock signal input from the clock generator 25, the entrance / exit of the visitor 6 passing through the detection gate 1 is determined, and the determination result and the information on the time are obtained. Is composed of a signal processing unit 24 to be output to the counter 5 generates the free entry and exit information.

  The timing control unit 23 detects the time when the current value becomes 0 in the rising direction of the current having the predetermined frequency generated by the alternating magnetic field generation unit 20, that is, the time when the current direction reverses from negative to positive. The reference signal is output to the A detection unit 21 and the B detection unit 22 at a timing once in one period of the alternating magnetic field at the detected time.

  The A detection unit 21 and the B detection unit 22 detect the induced currents flowing through the detection coils 31 and 32 as detection signals based on the timing of the reference signal output from the timing control unit 23.

  FIG. 3 shows an example of the magnetic property of the admission card 7 carried by the visitor 6 and the magnetic wire 8 embedded in the admission card 7. FIG. 3 (a) is carried by the visitor 6. FIG. 3B is a diagram showing an example of the entrance certificate 7, and FIG. 3B is a diagram showing characteristics of the magnetic wire 8 embedded in the entrance certificate 7.

  As shown in FIG. 3A and FIG. 3B, the magnetic wire 8 embedded in the entrance certificate 7 is, for example, a magnetic material wire of a Co—Fe amorphous soft magnetic material. The magnetic wire 8 has a coercive force specific to the wire diameter and length.

  Further, the magnetic wire 8 has a magnetic characteristic of a magnetic history curve 310 as shown in FIG. 3B, and as shown in the magnetic history curve 310, the magnetic wire 8 has a coercive force H1. Yes.

  A method of detecting the magnetic wire 8 of the entrance certificate 7 configured as described above will be described with reference to FIG.

  For example, as shown in FIG. 4A, the alternating magnetic field generation unit 20 of the gate controller 2 that controls the detection gate 1 performs a control to flow a current of frequency 10 kHz to the excitation coil 30, whereby the excitation coil 30 to the excitation coil 30. An alternating magnetic field 401 having a frequency of 10 kHz is generated in a predetermined space corresponding to the shape.

  When the magnetic wire 8 having the coercive force H1 is placed in the alternating magnetic field 401, the magnetic wire 8 undergoes magnetization reversal when receiving the alternating magnetic field 401 whose magnetic field strength exceeds H1 or -H1, and at that time, the magnetic wire 8 is steep. Magnetic pulse A (when the magnetic field intensity exceeds H1) and magnetic pulse B (when the magnetic field intensity exceeds -H1).

  Magnetic pulse A and magnetic pulse B generated when the magnetic wire 8 is reversed in magnetization are detected by the A detection unit 21 or B detection unit 22 of the gate controller 2 connected to each detection coil via the detection coil 31 or the detection coil 32. The pulse signal A as shown in FIG. 4B is detected by performing signal processing so as to detect only the magnetic pulse A emitted when the magnetic field intensity exceeds H1.

  Specifically, the magnetic wire 8 receives an alternating magnetic field 401 whose magnetic field strength exceeds approximately H1 near the time ta from the reference signal output from the timing control unit 23 and whose magnetic field strength exceeds approximately −H1 near the time tb. In this case, the pulse signal A and the pulse signal B corresponding to the steep magnetic pulse A (near time ta) and magnetic pulse B (near time tb) generated by the magnetization reversal of the magnetic wire 8 are detected coil 31 or detection coil 32. Is detected by the A detector 21 or the B detector 22.

  The A detector 21 or B detector 22 that detects the pulse signal A and the pulse signal B is emitted from the magnetic wire 8 when the magnetic field intensity of the alternating magnetic field 401 exceeds approximately H1 (near time ta from the reference signal). The signal processing is performed so that only the magnetic pulse A is detected, and the detection signal 402 is detected.

  In addition, since the output of the detection signal of the magnetic pulse which the magnetic wire 8 emits becomes so that the distance between the magnetic wire 8 and the detection coil is near, the magnetic wire 8 is located near each of the detection coil 31 and the detection coil 32. When passing and moving, a magnetic pulse emitted from the magnetic wire 8 first by a detection unit (A detection unit 21 or B detection unit 22) connected to a detection coil close to the magnetic wire 8 among the detection coils. Is detected.

  Thus, when the visitor 6 carrying the entrance ticket 7 passes through the detection gate 1 and the detection gate 3 at each entrance / exit of the venue 9, the magnetic wire 8 attached to the entrance ticket 7 is excited for each detection gate. A magnetic pulse generated by the magnetic wire 8 upon receiving an alternating magnetic field generated from the coil 30 and reversing is detected by a detection unit (A detection) connected to a detection coil (detection coil 31 or detection coil 32) close to the magnetic wire 8. Since the part 21 or the B detection part 22) detects first, it can be recognized from which detection coil side of each detection gate the visitor 6 has entered.

  The magnetic wire 8 embedded in the entrance certificate 7 may be affixed to the entrance certificate 7 as long as it is attached to an arbitrary position of the entrance certificate 7.

  The magnetic wire 8 is arranged on the basis of the traveling direction in which the visitor 6 passes the detection gate 1 and the direction of the alternating magnetic field transmitted from the excitation coil 30 of the detection gate 1. The direction that is most easily magnetized by receiving an alternating magnetic field transmitted from the exciting coil 30 is specified, and the magnetic wire 8 is placed in the direction so that the direction of the magnetic wire 8 of the entrance certificate 7 carried by the visitor 6 is closer. 7 may be given.

  By the way, the entrance / exit detection device 100 is configured to detect whether a visitor 6 who has passed through the detection gate 1 or the detection gate 3 has entered or exited the venue 9, and the entrance of the visitor 6 has entered. Based on the exit information, a desired number such as the total number of visitors, the number of visitors at any time, the number of visitors, and the like are totaled and output.

  A method for detecting the entrance / exit of the visitor 6 passing through each detection gate of the entrance / exit detection device 100 and its control operation will be described with reference to FIGS.

  5 and 6 are diagrams illustrating examples of detection signals detected by the A detection unit and the B detection unit of each gate controller when the visitor 6 at the time of entering and leaving the venue 9 passes through each detection gate. .

  FIG. 5 shows the state of the detection signal detected by the A detection unit 21 and the B detection unit 22 of the gate controller 2 at that time when the visitor 6 at the time of entering the venue 9 passes the detection gate 1. FIG. 6 is a diagram showing an example. FIG. 6 shows a state where the visitor 6 when leaving the venue 9 passes through the detection gate 1 and is detected by the A detection unit 21 and the B detection unit 22 of the gate controller 2 at that time, respectively. It is a figure which shows an example of the detection signal to be performed.

  As shown in FIGS. 5A and 5B, when a visitor 6 (shown by a broken line) passes through the detection gate 1 to enter the venue 9, the visitor 6 It proceeds from the detection coil 31 side to the detection coil 32 side and enters the venue 9.

  An alternating magnetic field transmitted from the excitation coil 30 is formed in the detection gate 1 in a space corresponding to the shape of the excitation coil 30, and a visitor 6 who enters the venue 9 enters from the detection coil 31 side of the detection gate 1. Upon arrival, the magnetic wire 8 of the admission card 7 carried by the visitor 6 receives an alternating magnetic field and reverses magnetization, and at that time, a steep magnetic pulse is emitted.

  As shown in FIG. 5A, the magnetic pulse emitted by the magnetic wire 8 is such that the A detection unit 21 connected to the detection coil 31 disposed at a position close to the magnetic wire 8 is as shown in FIG. Although the detection signal 501 is detected, the B detection unit 22 connected to the detection coil 32 arranged at a position far from the magnetic wire 8 as compared with the arrangement position of the detection coil 31 detects a magnetic pulse emitted from the magnetic wire 8. The output is small and hardly detected.

  Further, as shown in FIG. 5 (c), when the visitor 6 enters the venue 9 and further proceeds to the detection coil 32 side in the detection gate 1, and moves to the vicinity of the detection coil 32, the detection coil 32 and the magnetic wire 8, the B detection unit 22 connected to the detection coil 32 detects a magnetic pulse at the time of magnetization reversal of the magnetic wire 8 with a detection signal 502 as shown in FIG.

  On the other hand, the magnetic pulse emitted from the magnetic wire 8 is hardly detected in the A detection unit 21 connected to the detection coil 31 by moving the magnetic wire 8 away from the detection coil 31 as the visitor 6 moves.

  When the visitor 6 (shown by a broken line) passes through the detection gate 1 to leave the venue 9, the visitor 6 proceeds from the detection coil 32 side of the detection gate 1 toward the detection coil 31 side. , Exit the venue 9.

  In this case, as shown in FIG. 6A, when the visitor 6 enters from the detection coil 32 side of the detection gate 1, the magnetic wire 8 of the entrance certificate 7 carried by the visitor 6 comes from the excitation coil 30. A magnetization signal is reversed upon receiving an alternating magnetic field transmitted, and a steep magnetic pulse emitted from the magnetic wire 8 at that time is detected by the B detection unit 22 connected to the detection coil 32 as shown in FIG. 6B. However, the detection output of the magnetic pulse emitted from the magnetic wire 8 is small in the A detection unit 21 connected to the detection coil 31 arranged at a position far from the magnetic wire 8 as compared with the arrangement position of the detection coil 32. Almost no detection.

  Further, when the visitor 6 leaves the venue 9 and proceeds further to the detection coil 31 side in the detection gate 1 and reaches the vicinity of the detection coil 31, as shown in FIG. 6C, the detection coil 31 and the magnetic wire 8. The A detector 21 connected to the detection coil 31 detects a magnetic pulse at the time of magnetization reversal of the magnetic wire 8 by a detection signal 602 as shown in FIG.

  On the other hand, the magnetic pulse emitted from the magnetic wire 8 is hardly detected in the B detection unit 22 connected to the detection coil 32 by moving the magnetic wire 8 away from the detection coil 32 as the visitor 6 moves.

  The detection signals detected by the A detection unit 21 and the B detection unit 22 in this way are output to the signal processing unit 24 of the gate controller 2, and the signal processing unit 24 inputs from the A detection unit 21 and the B detection unit 22. Based on the detected signal, the entrance / exit of the visitor 6 who has passed through the detection gate 1 is determined and detected.

  7 and 8 show that the signal processing unit 24 of the gate controller 2 passes the detection gate 1 based on the detection signal input from the A detection unit 21 and the B detection unit 22 and the clock signal input from the clock generation unit 25. It is explanatory drawing which shows an example of the method of detecting the entrance / exit of the visitor 6. FIG.

  7 shows the signal processing unit 24 based on the detection signal input from the A detection unit 21 and the B detection unit 22 and the clock signal input from the clock generation unit 25 when the visitor 6 at the time of entrance passes the detection gate 1. FIG. 8 is a diagram showing an example of detecting the entrance of a visitor 6, and FIG. 8 is a diagram illustrating a detection signal and clock generation that are input from the A detection unit 21 and the B detection unit 22 when the visitor 6 leaves the detection gate 1. It is a figure which shows an example in which the signal processing part 24 detects the leaving of the visitor 6 based on the clock signal input from the part 25. FIG.

  When the visitor 6 at the time of entry passes through the detection gate 1, the visitor 6 travels from the detection coil 31 side of the detection gate 1 toward the detection coil 32 and enters the venue 9, so the visitor 6 carries it. A magnetic pulse generated when the magnetic wire 8 of the entrance certificate 7 receives an alternating magnetic field transmitted from the excitation coil 30 of the detection gate 1 and the magnetization is reversed is first detected by the A detection unit 21 via the detection coil 31 in FIG. The detection signal 501 as shown in FIG. 7 is detected, and then the B detection unit 22 detects the detection signal 502 as shown in FIG. 7B via the detection coil 32 and the detection signal 501 detected by each detection unit. , 502 are output to the signal processing unit 24.

  The signal processing unit 24 receives a clock signal from the clock generation unit 25 in addition to the detection signals input from the A detection unit 21 and the B detection unit 22, and the signal processing unit 24 is shown in FIG. A clock as shown in FIG. 7C is based on the detection signal 501 input from the A detector 21, the detection signal 502 input from the B detector 22, and the clock signal input from the clock generator 25. A detection signal 701 obtained by combining the detection signal 501 input from the A detection unit 21 in correspondence with the signal 503 (horizontal axis: time axis t) and a detection signal 702 combined with the detection signal 502 input from the B detection unit 22. And detect.

  Further, the signal processing unit 24 determines the entrance / exit of the visitor 6 passing through the detection gate 1 based on the detection result of the detection signal 701 and the detection signal 701 corresponding to the clock signal 503 (horizontal axis: time axis t). Detect.

  Specifically, in the signal processing unit 24, the visitor 6 detects the detection gate 1 based on the detection signal pattern in which the detection signal 701 is first detected by the A detection unit 21 and the detection signal 702 is detected by the B detection unit 22 later. The detection gate information (in this case, the detection gate 1) and the time (for example, 2006/07/01) that has detected that the visitor 6 has passed as shown in FIG. / 09: 00: 00) and a signal (IN) indicating that the visitor 6 has entered is output to the counting device 5.

  The clock signal is a signal that keeps time, and the date and time when each detection signal is detected is specified by associating the clock signal with each detection signal.

  Further, as shown in the above-described determination result, the case where the detection signal is first detected by the A detection unit 21 and the detection signal is detected by the B detection unit 22 later is “entrance”, and the detection signal is first detected by the B detection unit 22. When the detection signal is detected by the A detection unit 21 later, judgment information that associates the detection signal pattern with the entry / exit information, such as “exit”, is stored in a storage unit (not shown) of each gate controller. The judgment of entry / exit when the visitor 6 passes through the detection gate 1 based on the detection signal pattern is held with reference to this judgment information.

  When the visitor 6 at the time of leaving passes through the detection gate 1, the visitor 6 proceeds from the detection coil 32 side to the detection coil 31 side of the detection gate 1 and exits from the venue 9, so the visitor 6 carries the entrance. A magnetic pulse generated when the magnetic wire 8 of Evidence 7 receives an alternating magnetic field transmitted from the excitation coil 30 of the detection gate 1 and reversal of magnetization is first detected by the B detection unit 22 via the detection coil 32 in FIG. The detection signal 601 as shown in FIG. 8 is detected, and then the detection signal 601 detected by each detection unit when the A detection unit 21 detects the detection signal 602 as shown in FIG. 602 is output to the signal processing unit 24.

  As shown in FIG. 8D, the signal processing unit 24 is input from the detection signal 602 input from the A detection unit 21, the detection signal 601 input from the B detection unit 22, and the clock generation unit 25. Based on the clock signal, the detection signal 802 obtained by synthesizing the detection signal 602 input from the A detection unit 21 corresponding to the clock signal 504 (horizontal axis: time axis t) shown in FIG. A detection signal 801 obtained by synthesizing the input detection signal 601 is detected.

The signal processing unit 24 determines the entry / exit of the visitor 6 passing through the detection gate 1 based on the detection result of the detection signal 801 and the detection signal 802 corresponding to the clock signal 503 (horizontal axis: time axis t). Specifically, in the signal processing unit 24, the visitor 6 detects the detection gate based on the detection signal pattern in which the detection signal 801 is first detected by the B detection unit 22 and the detection signal 802 is detected by the A detection unit 21 later. The detection gate information (in this case, detection gate 1) that detects that the visitor 6 has passed as shown in FIG. 8 (e) and the time (for example, 2006/07 / 01/16: 00: 00) and a signal (OUT) indicating that the visitor 6 has left is output to the counting device 5.

  The entrance / exit information of the visitors 6 passing through the detection gates output from the gate controller 2 that controls the detection gate 1 and the gate controller 4 that controls the detection gate 2 by such operation control is output to the counting device 5, The counting device 5 accumulates and stores the input / exit information, and the total number of visitors based on the entrance / exit information of each detection gate stored and held by an instruction operation of the counting device 5 by a venue administrator (not shown). A desired number such as the number of visitors and the number of attendees at the time is totaled and output.

  Specifically, the signal processing unit 24 includes the date and time 901 when the detection gate detects the passing of the visitor 6 based on the entrance / exit information of the visitor 6 passing through each detection gate input from the respective gate controllers 2 and 4; The entry / exit history information 900 as shown in FIG. 9A is constituted by detection gate identification information 902 indicating the detection gate and entry / exit information 903 indicating entry / exit of the visitor 6 when the detection gate passes. Create and keep memorized.

  In addition, when the venue manager instructs the counting device 5 to obtain desired information such as grasping the situation of the visitors for the purpose of venue management, the counting device 5 totals each information of the entry / exit history information 900. 9b, the total number of visitors, the total number of visitors, the number of visitors and other information 910 at a given time, and the total number of visitors per day history information 920 that totals the total number of visitors by day. Is created and output.

  The entrance / exit detection device 100 constituted by the detection gate 1, the detection gate 3, the gate controller 2, the gate controller 4, and the counting device 5 as described above passes through the detection gates 1 and 2. A series of operations from detecting the entrance / exit of the visitor 6 to totaling and outputting the desired number of visitors 6 such as the total number of visitors, the number of visitors at any time, and the number of visitors based on the detection result An example will be described with reference to the flowchart of FIG.

  As shown in FIG. 10, the manager of the venue 9 starts up and activates the power sources of the gate controller 2, the gate controller 4, and the counting device 5 before opening the hall. An alternating magnetic field is generated in (S1001).

  The generation of the alternating magnetic field in each of the detection gates 1 and 3 is caused by the alternating magnetic field generation unit (the alternating magnetic field generation unit 20 in the case of the gate controller 2) of each of the gate controllers 2 and 4 supplying a current of a predetermined frequency to each gate controller. 2 and 4 are controlled to flow to the excitation coils of the respective detection gates 1 and 3 (in the case of the detection gate 1, the excitation coil 30), thereby performing a predetermined frequency in a predetermined space corresponding to the shape of each excitation coil. An alternating magnetic field is generated.

  When a visitor 6 carrying the admission card 7 passes through each of the detection gates 1 and 3 to which an alternating magnetic field is transmitted, the magnetic wire 8 attached to the admission card 7 receives the alternating magnetic field and becomes steep magnetized at the time of magnetization reversal. Since the pulse is generated, the magnetic pulse is passed through the detection coil of the detection gate (in the case of the detection gate 1, the detection coils 31 and 32) through the detection coil of the detection gate (in the case of the detection gate 1). , And is detected by the gate controller 2) (YES in step S1002).

  The gate controller that has detected the magnetic pulse analyzes the detection signal and determines the entrance / exit of the visitor 6 who has passed the detection gate based on the analysis result (S step 1003, S step 1004).

  Specifically, the detection signal is analyzed by detecting each of the detection units (detection gate 1) of the gate controller respectively connected to a plurality of detection coils (in the case of detection gate 1, detection coils 31 and 32). In this case, the visitors who have passed through the detection gate based on the criterion information stored in advance for the detection signal pattern that has been signal-processed, and processed the detection signals of the A detection unit 21 and the B detection unit 22) in time series. Judgment of exit / exit of 6.

  For example, when a predetermined detection unit first detects a magnetic pulse emitted by the magnetic wire 8 and later a detection signal pattern detected by another detection unit is obtained, the visitor 6 who passes through the detection gate enters When the detection signal pattern detected by the other detection unit is detected first by the other detection unit and then detected by the predetermined detection unit, it is determined that the visitor 6 who has passed the detection gate has left. To do.

  Based on the determination result thus determined, entry / exit information including information on the detection gate that has detected the passage of the visitor 6, its time, and information indicating the entry / exit of the visitor 6 is created, and the counting device 5 (S1005).

  On the other hand, the counting device 5 that has received the entry / exit information of each visitor 6 passing through each detection gate, which is output from the gate controller 2 that controls the detection gate 1 and the gate controller 4 that controls the detection gate 3, respectively, Are stored and held (S1006), and the total number of visitors, the number of visitors at a given time, the number of attendees, etc. based on the entry / exit information stored and retained by the instruction operation of the counting device 5 by the venue manager. The desired number is totaled and output (S1007).

  In this way, the entrance / exit detection device 100 can detect the visitor 6 passing through each detection gate installed at the entrance / exit of the venue 9 and can detect the entrance / exit of the visitor 6. Thus, it is possible to provide the venue manager with various detailed information for venue management such as the number of visitors 6 and the number of visitors leaving.

  In the above description, the two detection coils of the detection coil 31 and the detection coil 32 are respectively arranged on the entrance / exit side of the detection gate 1, and those detection coils of the entrance certificate 7 carried by the visitor 6 passing through the detection gate. Although the example which detects the entrance / exit of the visitor 6 based on the detection result which detected the magnetic wire 8 was shown, the passing point of the visitor 6 which passes a detection gate by increasing the number of the detection coils arrange | positioned at a detection gate is shown. It is good also as a structure which detects in detail and detects the entrance / exit of the visitor 6 based on this detection result.

  In this case, the detection gates installed at the entrances and exits of the venue 9 are configured as detection gates 10 as shown in FIG. 11, for example, and the gate controller that controls the detection gates 10 is configured as the gate controller 27.

  Specifically, the detection gate 10 includes an excitation coil 33 for applying an alternating magnetic field to the magnetic wire 8 of the admission card 7 carried by the visitor 6 when passing through the detection gate 10 and a magnetic wire 8 receiving the alternating magnetic field. A plurality of detection coils 34-1, detection coils 34-2,..., Detection coils 34-12 (collectively referred to as “detection coils 34-n”) for detecting magnetic pulses generated at the time of magnetization reversal. The embedded plate 10a and a plate 10b (not shown) configured in the same manner as the plate 10a are arranged to face each other in the same manner as the detection gate 1 (see FIG. 2).

  In addition, the gate controller 27 corresponds to each detection coil of the detection coil 34-n of the detection gate 10, and each of the detection units 26-1, 26-2,. .., a detection unit 26-12 (collectively referred to as “detection unit 26-n”), a timing control unit 23 that performs timing control of the alternating magnetic field generation unit 20 and the detection unit 26-n, and a clock signal. The entry / exit of the visitor 6 who passes through the detection gate 10 is determined based on the clock generation unit 25 to be generated, the detection signal detected by the detection unit 26-n, and the clock signal input from the clock generation unit 25, The signal processing unit 24 generates entry / exit information including the determination result and information on the time and outputs the entry / exit information to the counting device 5.

  By comprising in this way, the passing point of the visitor 6 who passes the detection gate 10 can be detected in detail, and the entrance / exit of the visitor 6 can be detected with higher accuracy based on this detection result.

  In the present invention, the detection of the magnetic material, the detection of the moving direction and the moving path of the magnetic material or the magnetic material detection device, and the detection result when the magnetic material and the magnetic material detection device are relatively moving. Applicable to the applied technology.

The figure which shows an example of the entrance / exit detection apparatus 100 to which the magnetic body detection apparatus of this invention is applied. The block diagram which shows the structure of the principal part of the detection gate which comprises the magnetic body detection apparatus of this invention, and a gate controller The figure which shows an example of the magnetic characteristic of the entrance wire 7 and the magnetic wire 8 embedded in the entrance ticket 7 Explanatory drawing of how each gate controller detects the magnetic wire 8 of the entrance certificate 7 The figure which shows an example of the detection signal of the magnetic wire 8 detected by the detection part when the visitor 6 at the time of entrance passes the detection gate 1 The figure which shows an example of the detection signal of the magnetic wire 8 detected by the detection part when the visitor 6 at the time of leaving passes the detection gate 1 Explanatory drawing which shows an example of the method of detecting the entrance of the visitor 6 who passed the detection gate 1 Explanatory drawing which shows an example of the method of detecting the leaving of the visitor 6 who passed the detection gate 1 The figure which shows an example of the entrance / exit information 903 output from the signal processing part 24 The figure which shows the flowchart of a series of operation | movement until the entrance / exit detection apparatus 100 detects the entrance / exit of the visitor 6, and outputs various summary information based on a detection result. The block diagram which shows the structure of the main part of the detection gate which detects the passing point of the visitor 6 of a detection gate passage in detail, and detects entrance / exit, and a gate controller

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 3 Detection gate 1a, 1b Board 2, 4 Gate controller 5 Counting device 6 Visitor 7 Entrance certificate 8 Magnetic wire 9 Venue 20 Alternating magnetic field generation part 21 A detection part 22 B detection part 23 Timing control part 24 Signal processing part 25 Clock generation unit 30 Excitation coil 31, 32 Detection coil 100 Entrance / exit detection device 310 Magnetic history curve 401 Alternating magnetic field 402 Detection signal 501 Detection signal (A detection unit when a visitor enters)
502 Detection signal (B detector when a visitor enters)
601 Detection signal (B detector when a visitor leaves)
602 Detection signal (A detector when a visitor leaves)
701 Detection signal (synthesis signal of detection signal 501)
702 Detection signal (synthesis signal of detection signal 502)
801 Detection signal (synthesis signal of detection signal 601)
802 Detection signal (synthetic signal of detection signal 602)
900 Entrance / exit history information 910 Entrance / exit total information 920 Daily attendance total history information

Claims (5)

An excitation coil that generates an alternating magnetic field that causes magnetization reversal in the magnetic material and generates a magnetic pulse from the magnetic material at the time of the magnetization reversal;
A plurality of detection coils that are arranged in a predetermined positional relationship corresponding to the magnetic coils and that respectively detect magnetic pulses generated from the magnetic material;
And a discriminating means for discriminating a passing direction of the moving body provided with the magnetic body based on detection outputs of the plurality of detecting coils. The plurality of detection coils are:
Arranged at a predetermined distance along the moving path of the moving body,
The discrimination means includes
Time information generating means for generating time information;
Detecting means for detecting time information generated by the time information generating means at the time when the detection coil detects the magnetic pulse;
Comprising
The magnetic body detection apparatus of Claim 1 which discriminate | determines the passage direction in the said movement path | route of the moving body to which the said magnetic body was provided based on the order of the time information detected by the said detection means. An excitation coil that is provided at the entrance and exit of a predetermined space, generates an alternating magnetic field that causes magnetization reversal in the magnetic material and generates a magnetic pulse from the magnetic material at the time of the magnetization reversal, and a predetermined position corresponding to the magnetic coil; Discrimination for discriminating a passing direction of a plurality of detection coils disposed in relation to each other and detecting a magnetic pulse generated from the magnetic body and a moving body to which the magnetic body is applied based on detection outputs of the plurality of detection coils And a magnetic substance detection device that detects entry / exit of the moving body with respect to the space based on a determination result of the determination means,
An entrance / exit detection device comprising: counting means for counting the number of the moving bodies in the space based on a detection output of the magnetic body detection device. An alternating magnetic field generated by an exciting coil is applied to the magnetic material to cause magnetization reversal in the magnetic material, and magnetic pulses generated from the magnetic material at the time of the magnetization reversal are arranged in a predetermined positional relationship corresponding to the magnetic coil. Detecting each with a plurality of detection coils installed,
A magnetic body detection method in which a determination unit determines a passing direction of a moving body provided with the magnetic body based on detection outputs of the plurality of detection coils. The plurality of detection coils are:
Arranged at a predetermined distance along the moving path of the moving body,
The discrimination means includes
Time information is generated by the time information generating means,
The detection means detects time information generated by the time information generation means when the detection coil detects the magnetic pulse,
The magnetic body detection method of Claim 4 which discriminate | determines the passage direction in the said movement path | route of the moving body to which the said magnetic body was provided based on the order of the time information detected by the said detection means.

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