CN114245914A - Wireless tag of access management system and access management system - Google Patents
Wireless tag of access management system and access management system Download PDFInfo
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- CN114245914A CN114245914A CN201980099314.2A CN201980099314A CN114245914A CN 114245914 A CN114245914 A CN 114245914A CN 201980099314 A CN201980099314 A CN 201980099314A CN 114245914 A CN114245914 A CN 114245914A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
Abstract
Provided are an entry/exit management system (1) and a wireless tag (3) which do not require adjustment of the transmission intensity of a detection signal to match the width of a gate (15). In an entry/exit management system (1), a pair of first antenna devices (1) (4) are arranged on both sides with a center of a passage of a door (15) therebetween. The door (15) is provided at the boundary of the management area (A0). The management area (a0) is an area for managing entry and exit of users. A pair of 1 st antenna devices (4) transmit detection signals to the other side. The wireless tag (3) receives detection signals transmitted by the pair of first antenna devices (1) (4). The wireless tag (3) transmits a response signal when both of the signal strengths of the detection signals from the pair of first antenna devices (1) are equal to or higher than a1 st threshold.
Description
Technical Field
The present invention relates to a wireless tag for an entry/exit management system and an entry/exit management system.
Background
Documents of the prior art
Patent document
Patent document 1: international publication No. 2019/030821
Disclosure of Invention
Problems to be solved by the invention
However, in the passage detection system of patent document 1, the tag transmits a response signal according to the presence or absence of detection of the detection signal. Therefore, in the 1 st entrance-side antenna device and the 2 nd entrance-side antenna device, it is necessary to adjust the transmission intensity of the detection signal so that the propagation range of the detection signal coincides with the width of the gate.
The present invention has been made to solve such problems. An object of the present invention is to provide an entry/exit management system and a wireless tag of the entry/exit management system that do not require adjustment of the transmission intensity of a detection signal to be equal to the width of a gate.
Means for solving the problems
The wireless tag of the entry and exit management system of the present invention includes: a receiving unit that receives detection signals transmitted to the other side by a pair of first antenna devices 1, wherein the pair of first antenna devices 1 are disposed on both sides with a center of a passage of a door provided at a boundary of a management area for managing entrance and exit of a user; an intensity determination unit that determines the signal intensity of the detection signal received by the reception unit; and a transmitting unit that transmits the response signal when the intensity determination unit determines that both of the signal intensities of the detection signals transmitted from the pair of first antenna devices 1 are the signal intensities of the preset 1 st threshold or more.
The entry and exit management system of the present invention includes: a pair of 1 st antenna devices which are disposed on both sides with a center of a passage of a door provided at a boundary of a management area for managing entrance and exit of a user and transmit a detection signal to the other side; a wireless tag that transmits a response signal when both of the signal strengths of the detection signals transmitted from the pair of first antenna devices 1 are determined to be signal strengths equal to or greater than a preset 1 st threshold; and a passage detection device which detects passage of the wireless tag when at least one of the pair of the 1 st antenna devices receives the response signal from the wireless tag.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the wireless tag entering and exiting the management system transmits the response signal when determining that both the signal strengths of the detection signals transmitted from the pair of 1 st antenna devices are the signal strength of the 1 st threshold or more. Therefore, it is not necessary to adjust the transmission intensity of the detection signal to be consistent with the width of the gate.
Drawings
Fig. 1 is a block diagram showing the configuration of an entry and exit management system according to embodiment 1.
Fig. 2 is a plan view of a management area to which the entry and exit management system according to embodiment 1 is applied.
Fig. 3 is a table showing an operation example of the wireless tag according to embodiment 1.
Fig. 4 is a hardware configuration diagram of a main part of the entry and exit management system according to embodiment 1.
Fig. 5 is a block diagram showing the configuration of the entry and exit management system according to embodiment 2.
Fig. 6 is a plan view of a management area to which the entry and exit management system according to embodiment 2 is applied.
Fig. 7 is a table showing an operation example of the wireless tag according to embodiment 2.
Fig. 8 is a flowchart showing an operation example of the wireless tag according to embodiment 2.
Detailed Description
A mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and overlapping description is simplified or omitted as appropriate.
Fig. 1 is a block diagram showing the configuration of an entry and exit management system according to embodiment 1.
The entry/exit management system 1 is installed in a place having a management area a 0. The management area a0 is an area for managing entry and exit of users. The management area a0 is, for example, an area inside or outside a building. The management area a0 may be, for example, the inside of a room.
The entry/exit management system 1 includes an entry/exit management apparatus 2 and a wireless tag 3. The entry/exit management device 2 includes a pair of first antenna devices 4, a sub-control device 5, a verification device 6, an opening/closing device 7, and a main control device 8, as shown in fig. 1.
In this example, the pair of 1 st antenna devices 4 have the same configuration. The pair of first antenna devices 4 includes a transmission antenna 9 and a reception antenna 10, respectively. The transmission antenna 9 is an antenna that transmits the detection signal. The detection signal is a signal for detecting a user who enters or exits the management area a 0. The detection signal is, for example, a radio signal based on a radio wave such as a long wave. The detection signal includes 1 st identification information for identifying the 1 st antenna device 4 that transmitted the detection signal. The 1 st identification information is set as information different from each other so that the 1 st pair of antenna devices 4 can be identified respectively. The receiving antenna 10 is an antenna that receives the response signal. The response signal is a signal responsive to the detection signal. The response signal is, for example, a radio signal based on an electric wave such as an ultra-short wave. The response signal contains the 2 nd identification information identifying the device that transmitted the response signal. The 1 st antenna device 4 is, for example, a reader.
The sub-control device 5 is a device that controls the operation of each of the pair of first antenna devices 4. The operation of the 1 st antenna device 4 includes, for example, transmission of a detection signal, reception of a response signal, generation and conversion of a signal for communication by radio waves or the like.
The verification device 6 is a device that determines whether or not the user is permitted to enter and exit the management area a 0. The verification device 6 stores the 2 nd identification information of the device held by the permitted user. The collating device 6 collates the stored 2 nd identification information with the 2 nd identification information included in the response signal read by the 1 st antenna device 4, for example, to determine whether entry and exit with respect to the management area a0 are permitted.
The opening/closing device 7 is a device that opens and closes based on the determination by the collating device 6 so that a user permitted to enter and exit from the management area a0 can pass through the boundary of the management area a 0. The opening/closing device 7 includes a shutter, a bar, a door, or the like for opening and closing. Alternatively, the opening/closing device 7 may be an electronic lock having a door provided at the boundary of the management area a0, for example.
The main control device 8 controls the operation of the entry and exit management device 2. The main control device 8 is connected to the 1 st antenna device 4, for example, via the sub-control device 5, so that information included in the response signal received by the 1 st antenna device 4 can be acquired. The main control device 8 is connected to the collating device 6 so that the 2 nd identification information included in the response signal can be output. The main control device 8 is connected to the opening/closing device 7 so as to be able to output the determination result of the collating device 6. In this example, the main control device 8 detects the passage of the user based on the determination result of the collating device 6. The main control device 8 is an example of a traffic detection device.
The wireless tag 3 is a portable device. The wireless tag 3 is held by a user. The wireless tag 3 stores the 2 nd identification information. The 2 nd identification information of the wireless tag 3 is associated with the user who holds the wireless tag 3. The wireless tag 3 includes a receiving unit 11, a strength determination unit 12, a response control unit 13, and a transmitting unit 14.
The receiving unit 11 is a part that receives the detection signal.
The intensity determination unit 12 is a unit that determines the signal intensity of the detection signal received by the reception unit 11. The Signal Strength is, for example, an RSSI value (RSSI: Received Signal Strength Indicator). The intensity determination unit 12 stores a preset 1 st threshold value. The intensity determination unit 12 compares the signal intensity of the received detection signal with a1 st threshold value.
The response control section 13 is a section that controls the response of the wireless tag 3 to the detection signal received by the receiving section 11. The response of the wireless tag 3 is, for example, transmission of a response signal.
The transmitting section 14 is a section that transmits a response signal in response to the detection signal received by the receiving section 11.
Fig. 2 is a plan view of a management area to which the entry and exit management system according to embodiment 1 is applied.
A door 15 is provided at the boundary of the management area a 0. The door 15 has a passage 16 through which a user can pass. The door 15 is, for example, a pair of wall-shaped devices provided with a passage 16 therebetween. Alternatively, the door 15 may be a door frame, for example. The user enters and exits with respect to the management area a0 by entering the detection area a 1. The entrance detection zone a1 is an area that includes the center of the passageway 16.
The pair of 1 st antenna devices 4 are provided on the door 15, respectively. The pair of first antenna devices 4 are disposed on the left and right sides with respect to the center line C of the center of the passage 16. The pair of first antenna devices 4 face each other. The pair of first antenna devices 4 transmit the detection signal to at least the other side via the transmission antenna 9, respectively. That is, the 1 st antenna device 4 on the right side transmits a detection signal to at least the left side. The 1 st antenna device 4 on the left side transmits a detection signal at least to the right side. The pair of first antenna devices 14 may transmit detection signals to both the left and right sides.
In this example, the detection signal propagates spherically around the 1 st antenna device 4 of the transmission source. The signal strength of the detection signal attenuates as it goes away from the transmission source. The signal intensity of the detection signal is lower than the detection limit of the receiving unit 11 of the wireless tag 3 in a range where the distance from the transmission source is R0 or more.
The 1 st threshold of the wireless tag 3 is set in advance to be smaller than the signal strength of the detection signal from the pair of 1 st antenna devices 4 entering the detection area a 1. For example, when the distance R1 corresponds to the width of the path 16, the 1 st threshold is set in advance to the signal strength of the detection signal at a point where the distance from the 1 st antenna device 4 becomes R1. In this example, the entrance detection area a1 is an area having a distance from the pair of first antenna devices 4 shorter than R1.
The sub-controller 5 is provided in the door 15 together with the pair of first antenna devices 4, for example. The main control device 8 and the collating device 6 may be provided to the door 15. Alternatively, the main control device 8 and the collating device 6 may be disposed at a place separate from the door 15. Part or all of the sub-control device 5, the collating device 6, and the main control device 8 may be mounted on the same hardware.
Next, an operation example of the entry/exit management system 1 will be described with reference to fig. 2 and 3.
Fig. 2 shows an example of a case where a user enters the management area a 0. In fig. 2, the user is not shown. Fig. 2 shows a moving path of the wireless tag 3 held by the user.
Fig. 3 is a table showing an operation example of the wireless tag according to embodiment 1.
The user holding the wireless tag 3 approaches the door 15. At a point separated from both the 1 st antenna devices 4 by a distance R0 or more, the receiving unit 11 of the wireless tag 3 does not receive the detection signal from either of the pair of 1 st antenna devices 4. At this time, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user further approaches the door 15. The user passes through the place (1). The distance between the point (1) and the 1 st antenna device 4 on the left side is shorter than R0 and is R1 or more. The distance between the point (1) and the 1 st antenna device 4 on the right side is R0 or more. At this time, the receiving unit 11 of the wireless tag 3 receives the detection signal having the intensity smaller than the 1 st threshold from the 1 st antenna device 4 on the left side. On the other hand, the receiving unit 11 does not receive the detection signal from the 1 st antenna device 4 on the right side. When the detection signal is not received from one of the pair of first antenna devices 4 1, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user further approaches the door 15. The user passes at the location (2). The distance between the point (2) and the 1 st antenna device 4 on the left side is shorter than R0 and is R1 or more. The distance between the point (2) and the right-side 1 st antenna device 4 is shorter than R0 and equal to or longer than R1. At this time, the receiving unit 11 of the wireless tag 3 receives the detection signal from the 1 st antenna device 4 on the left side. The receiving unit 11 also receives the detection signal from the 1 st antenna device 4 on the right side. When receiving the detection signal from both the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signal. The strength determination unit 12 determines that the signal strength of the detection signal from the 1 st antenna device 4 on the left side is smaller than the 1 st threshold. The strength determination unit 12 determines that the signal strength of the detection signal from the 1 st antenna device 4 on the right side is also smaller than the 1 st threshold. When both the signal strengths of the detection signals received from the pair of 1 st antenna devices 4 are lower than the 1 st threshold, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user enters the passageway 16 of the door 15. The user passes at the location (3). The distance between the point (3) and the 1 st antenna device 4 on the left side is shorter than R1. The distance between the point (3) and the right-side 1 st antenna device 4 is shorter than R0 and equal to or longer than R1. At this time, the receiving unit 11 of the wireless tag 3 receives the detection signal from both the 1 st antenna devices 4. When receiving the detection signal from both the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signal. The intensity determination unit 12 determines that the signal intensity of the detection signal from the 1 st antenna device 4 on the left side is equal to or greater than the 1 st threshold. The strength determination unit 12 determines that the signal strength of the detection signal from the 1 st antenna device 4 on the right side is smaller than the 1 st threshold. When the signal strength of at least one of the detection signals received from the pair of 1 st antenna devices 4 is lower than the 1 st threshold, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user enters into detection zone a 1. The user passes at the location (4). Here, the point (4) is a point of entering the inside of the detection area a 1. That is, the distance between the point (4) and the 1 st antenna device 4 on the left side is shorter than R1. The distance between the point (4) and the 1 st antenna device 4 on the right side is shorter than R1. At this time, the receiving unit 11 of the wireless tag 3 receives the detection signal from both the 1 st antenna devices 4. When receiving the detection signals from both of the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signals. The intensity determination unit 12 determines that the signal intensity of the detection signal from the 1 st antenna device 4 on the left side is equal to or greater than the 1 st threshold. The intensity determination unit 12 determines that the signal intensity of the detection signal from the 1 st antenna device 4 on the right side is also equal to or greater than the 1 st threshold. When both of the signal strengths of the detection signals received from the pair of 1 st antenna devices 4 are equal to or greater than the 1 st threshold, the response control unit 13 causes the transmission unit 14 to transmit the response signal.
The transmitting unit 14 transmits a response signal including the 2 nd identification information. At least one of the pair of first antenna devices 14 receives the response signal via the receiving antenna 10. The main control device 8 acquires the 2 nd identification information from the 1 st antenna device 4 through the sub-control device 5. The main control device 8 outputs the acquired 2 nd identification information to the collating device 6. The collating device 6 collates the stored 2 nd identification information with the 2 nd identification information output from the main control device 8. When the 2 nd identification information to be checked matches, the checking device 6 determines that the user having the wireless tag 3 is permitted to enter and exit the management area a 0. The main control device 8 acquires the determination result of the collating device 6. The main control device 8 outputs the determination result of the collating device 6 to the opening/closing device 7. The opening/closing device 7 opens the door 15 based on the determination result of the collating device 6, and allows a user permitted to enter and exit to pass through the passage 16. The user enters the management area a0 through the door 15. The main control device 8 detects the passage of the user.
When the user exits from the management area a0, the entry/exit management system 1 operates in the same manner as when the user enters the management area a 0.
As described above, the entry and exit management system 1 according to embodiment 1 includes the pair of first antenna devices 4, the wireless tag 3, and the traffic detection device 1. The pair of first antenna devices 4 1 are disposed on both sides with the center of the passage 16 of the door 15 interposed therebetween. The door 15 is disposed at the boundary of the management area a 0. The management area a0 is an area for managing entry and exit of users. The pair of first antenna devices 1 transmit detection signals to the other side. The wireless tag 3 transmits a response signal when determining that both of the signal strengths of the detection signals transmitted from the pair of first antenna devices 4 are equal to or higher than the 1 st threshold. The 1 st threshold is a preset value. The passage detection device detects the passage of a user having the wireless tag 3 when at least one of the pair of first antenna devices 1, 4 receives a response signal from the wireless tag 3.
The wireless tag 3 according to embodiment 1 includes a receiving unit 11, an intensity determination unit 12, and a transmitting unit 14. The receiving unit 11 receives detection signals transmitted from the pair of first antenna devices 4 1 to the other side. The intensity determination unit 12 determines the signal intensity of the detection signal received by the reception unit 11. The transmission unit 14 transmits the response signal when the intensity determination unit 12 determines that both of the signal intensities of the detection signals transmitted from the pair of first antenna devices 4 are the signal intensity of the 1 st threshold or more.
Thus, even if the pair of first antenna devices 4 each transmit the detection signal to a wide range including the entire door 15, the wireless tag 3 does not transmit the response signal at a position separated from the door 15. Therefore, the entry detection area a1 is formed inside the door 15 without adjusting the transmission intensity of the detection signal to coincide with the width of the door 15. Further, at the boundary of the entrance detection area a1, the signal intensity of the detection signal is greater than the detection limit of the receiving section 11. Therefore, the determination of the entry into the entry detection area a1 is less susceptible to noise and the like. Further, the wireless tag 3 does not transmit an unnecessary response signal when it leaves the entrance detection area a 1. Therefore, power consumption is suppressed in the wireless tag 3.
The detection signal may be a radio wave in a frequency band other than the long wavelength band. The response signal may be a radio wave in a frequency band other than the ultra-short wave.
Further, the pair of 1 st antenna devices 4 may alternately transmit the detection signals so as to avoid interference of the detection signals. At this time, the wireless tag 3 transmits the response signal when both the signal strengths of the detection signals received from both the pair of the 1 st antenna devices 4 are equal to or greater than the 1 st threshold value, for example, during one cycle in which the detection signals are alternately transmitted. Further, the pair of first antenna devices 1 may transmit detection signals having different frequencies so as to avoid interference of the detection signals.
Next, an example of the hardware configuration of the entry/exit management system 1 will be described with reference to fig. 4.
Fig. 4 is a hardware configuration diagram of a main part of the entry and exit management system according to embodiment 1.
The functions of the entry and exit management system 1 can be implemented by a processing circuit. The processing circuit is provided with at least 1 processor 1b and at least 1 memory 1 c. The processing circuit may include at least 1 dedicated hardware 1a together with the processor 1b and the memory 1c, or may include at least 1 dedicated hardware 1a instead of the processor 1b and the memory 1 c.
When the processing circuit includes the processor 1b and the memory 1c, each function of the entry/exit management system 1 is realized by software, firmware, or a combination of software and firmware. At least one of the software and the firmware is described in the form of a program. The program is stored in the memory 1 c. The processor 1b reads out and executes the program stored in the memory 1c to realize each function of the entry/exit management system 1.
The processor 1b is also called a CPU (Central Processing Unit), a Processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP. The memory 1c is constituted by a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.
In the case where the processing circuit includes the dedicated hardware 1a, the processing circuit is realized by, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.
The functions of the entry and exit management system 1 can be implemented by processing circuits, respectively. Alternatively, the functions of the entry/exit management system 1 can be realized by the processing circuit in a unified manner. The functions of the entry/exit management system 1 may be partially implemented by dedicated hardware 1a and partially implemented by software or firmware. In this way, the processing circuit realizes each function of the entry and exit management system 1 by hardware 1a, software, firmware, or a combination thereof.
In embodiment 2, points different from the example disclosed in embodiment 1 will be described in detail. As for the features not described in embodiment 2, any features of the example disclosed in embodiment 1 may be adopted.
Fig. 5 is a block diagram showing the configuration of the entry and exit management system according to embodiment 2.
The entry/exit management device 2 includes a pair of 1 st antenna devices 4, a pair of 2 nd antenna devices 17, 2 sub-control devices 5, a matching device 6, an opening/closing device 7, and a main control device 8.
In this example, the pair of 2 nd antenna devices 17 have the same configuration. The pair of 2 nd antenna devices 17 includes a transmission antenna 9 and a reception antenna 10, respectively. The 2 nd antenna device 17 is, for example, a reader. The 4 antenna devices of the pair of 1 st antenna devices 4 and the pair of 2 nd antenna devices 17 may have the same configuration.
One sub-controller 5 controls the operation of each of the pair of first antenna devices 4 1. The other sub-controller 5 controls the operation of each of the pair of 2 nd antenna devices 17. The operation of the 2 nd antenna device 17 includes, for example, transmission of a detection signal, reception of a response signal, generation and conversion of a signal for communication by radio waves and the like, as in the 1 st antenna device 4.
The main control device 8 is connected to the 1 st antenna device 4, for example, via the sub-control device 5, so that information included in the response signal received by the 1 st antenna device 4 can be acquired. The main control device 8 is connected to the 2 nd antenna device 17, for example, via the sub-control device 5, so that information included in the response signal received by the 2 nd antenna device 17 can be acquired.
The strength determination unit 12 of the wireless tag 3 stores the preset 1 st threshold and 2 nd threshold. The 2 nd threshold is a value having a lower intensity than the 1 st threshold. The intensity determination unit 12 compares the signal intensity of the received detection signal with the 1 st threshold or the 2 nd threshold.
The response control unit 13 manages the operating state of the wireless tag 3. The operation state of the wireless tag 3 includes, for example, a permission state and a prohibition state. The permission state is a state in which the transmission unit 14 is permitted to transmit the response signal. The prohibition state is a state in which the transmission unit 14 is prohibited from transmitting the response signal. The response control unit 13 switches the operation state of the wireless tag 3 to prohibit transmission of the response signal and release the prohibition.
Fig. 6 is a plan view of a management area to which the entry and exit management system according to embodiment 2 is applied.
The passage 16 of the door 15 is located in a range from an entrance of the door 15 to an exit of the door 15. The entrance of the door 15 is the portion of the user that enters the passageway 16. The exit of the door 15 is the part of the user coming out of the passageway 16. In the case where a user enters the management area a0, the entrance of the door 15 is, for example, a portion outside the management area a 0. At this time, the exit of the door 15 is, for example, a portion inside the management area a 0. On the other hand, when the user exits from the management area a0, the entrance of the door 15 is, for example, a part inside the management area a 0. At this time, the exit of the door 15 is, for example, a portion outside the management area a 0.
At the boundary of the management area a0, the user enters and exits with respect to the management area a0 by entering the detection zone a 1. Here, the user comes out of the entrance detection area a1 and then comes out of the exit detection area a 2. The exit detection zone A2 is the area that contains the entry detection zone A1. In this example, the escape detection area a2 is an area covering the entire passage 16 of the door 15.
The pair of 1 st antenna devices 4 are respectively provided on the entrance side of the door 15. The pair of first antenna devices 4 are disposed on the left and right sides with respect to the center line C of the center of the passage 16. The pair of first antenna devices 4 face each other. The pair of first antenna devices 4 transmit the detection signal to at least the other side via the transmission antenna 9, respectively. That is, the 1 st antenna device 4 on the right side transmits a detection signal to at least the left side. The 1 st antenna device 4 on the left side transmits a detection signal at least to the right side. The pair of first antenna devices 14 may transmit detection signals to both the left and right sides.
The pair of 2 nd antenna devices 17 are respectively provided on the exit side of the door 15. The pair of 2 nd antenna devices 17 are disposed on the left and right sides with respect to the center line C of the center of the passage 16. The pair of 2 nd antenna devices 17 face each other. The pair of 2 nd antenna devices 17 transmit the detection signal to at least the other side via the transmission antenna 9, respectively. That is, the 2 nd antenna device 17 on the right side transmits a detection signal to at least the left side. The 2 nd antenna device 17 on the left side transmits a detection signal at least to the right side. The pair of first antenna devices 14 may transmit detection signals to both the left and right sides.
In this example, the detection signal propagates spherically around the 1 st antenna device 4 or the 2 nd antenna device 17 of the transmission source. The signal strength of the detection signal attenuates as it goes away from the transmission source. The signal intensity of the detection signal is lower than the detection limit of the receiving unit 11 of the wireless tag 3 in a range where the distance from the transmission source is R0 or more.
The 1 st threshold of the wireless tag 3 is set in advance to be smaller than the signal strength of the detection signal from the pair of 1 st antenna devices 4 entering the detection area a 1. For example, when the distance R1 corresponds to the width of the path 16, the 1 st threshold is set in advance to the signal strength of the detection signal at a point where the distance from the 1 st antenna device 4 becomes R1. In this example, the entrance detection area a1 is an area that is shorter than R1 in both distances from the pair of 1 st antenna devices 4.
The 2 nd threshold of the wireless tag 3 is set in advance to be smaller than the signal strength of the detection signal from the pair of 2 nd antenna devices 17 in the detachment detection area a 2. The 2 nd threshold is set in advance to the signal strength of the detection signal at the point where the distance from the 2 nd antenna device 17 becomes R2. In this example, the entry detection area a1 is an area that is shorter than R2 in both distances from the pair of 2 nd antenna devices 17. Here, the distance R2 is longer than the distance R1.
Next, an operation example of the entry/exit management system 1 will be described with reference to fig. 6 and 7.
Fig. 6 shows an example of a case where a user enters the management area a 0. At this time, the pair of first antenna devices 4 is a pair of antenna devices located outside the management area a 0. The pair of 2 nd antenna devices 17 is a pair of antenna devices located inside the management area a 0. In fig. 6, the user is not shown. Fig. 6 shows a moving route of the wireless tag 3 held by the user.
Fig. 7 is a table showing an operation example of the wireless tag according to embodiment 2.
The user holding the wireless tag 3 approaches the door 15. Before the user enters the door 15, the operation state of the wireless tag 3 is permitted. At a point separated from both the 1 st antenna devices 4 by a distance R0 or more, the receiving unit 11 of the wireless tag 3 does not receive the detection signal from either of the pair of 1 st antenna devices 4. At this time, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user further approaches the door 15. The user passes through the location (1). Both distances between the point (1) and the pair of first antenna devices 4 1 are shorter than R0 and are R2 or more. Both distances between the point (1) and the pair of 2 nd antenna devices 17 are R0 or more. At this time, the receiving unit 11 receives the detection signal from both the 1 st antenna devices 4. On the other hand, the receiving unit 11 does not receive the detection signal from either of the pair of 2 nd antenna devices 17. When the wireless tag 3 is in the permission state and receives the detection signal from both the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signal. The strength determination unit 12 determines that both the signal strengths of the detection signals from the pair of first antenna devices 4 1 are smaller than the 2 nd threshold value. Therefore, both the signal strengths of the detection signals from the pair of 1 st antenna devices 4 are smaller than the 1 st threshold. When the signal strength of at least one of the detection signals received from the pair of 1 st antenna devices 4 is lower than the 1 st threshold, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user further approaches the door 15. The user passes through the location (2). Both distances between the point (2) and the pair of first antenna devices 14 are shorter than R2 and are R1 or more. Both distances between the point (2) and the pair of 2 nd antenna devices 17 are R0 or more. At this time, the receiving unit 11 receives detection signals from both of the pair of first antenna devices 4. On the other hand, the receiving unit 11 does not receive the detection signal from either of the pair of 2 nd antenna devices 17. Since the detection signals are received from both the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signals. The strength determination unit 12 determines that both the signal strengths of the detection signals from the pair of first antenna devices 4 are smaller than the 1 st threshold. At this time, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal.
The user enters into detection zone a 1. The user passes through the location (3). Location (3) is a location that enters the interior of detection zone a 1. Both distances between the point (3) and the pair of first antenna devices 14 are shorter than R1. Both distances between the point (3) and the pair of 2 nd antenna devices 17 are R0 or more. At this time, the receiving unit 11 receives detection signals from both of the pair of first antenna devices 4. On the other hand, the receiving unit 11 does not receive the detection signal from either of the pair of 2 nd antenna devices 17. Since the detection signals are received from both the 1 st antenna devices 4, the strength determination unit 12 determines the signal strength of the received detection signals. The strength determination unit 12 determines that both of the signal strengths of the detection signals from the pair of first antenna devices 4 are equal to or greater than the 1 st threshold. When both of the signal strengths of the detection signals received from the pair of 1 st antenna devices 4 are equal to or greater than the 1 st threshold, the response control unit 13 causes the transmission unit 14 to transmit the response signal. At this time, the response control unit 13 switches the state of the wireless tag 3 from the permission state to the prohibition state.
The transmitting unit 14 transmits a response signal including the 2 nd identification information. At least one of the pair of first antenna devices 14 receives the response signal via the receiving antenna 10. The main control device 8 acquires the 2 nd identification information from the 1 st antenna device 4 through the sub-control device 5. The main control device 8 outputs the acquired 2 nd identification information to the collating device 6. The collating device 6 collates the stored 2 nd identification information with the 2 nd identification information output from the main control device 8. When the checked 2 nd identification information matches, the checking device 6 determines that the user having the wireless tag 3 is permitted to enter and exit the management area a 0. The main control device 8 acquires the determination result of the collating device 6. The main control device 8 outputs the determination result of the collating device 6 to the opening/closing device 7. The opening/closing device 7 opens the door 15 based on the determination result of the collating device 6, and allows a user permitted to enter and exit to pass through the passage 16. The main control device 8 detects the passage of the user.
The user passes through the passage 16 of the door 15. The user passes through the location (4). Both distances between the point (4) and the pair of first antenna devices 14 are shorter than R2 and are R1 or more. Both distances between the point (4) and the pair of the 2 nd antenna devices 17 are shorter than R2 and are R1 or more. At this time, the receiving unit 11 receives detection signals from both of the pair of first antenna devices 4. The receiving unit 11 also receives the detection signal from both of the pair of 2 nd antenna devices 17. When the state of the wireless tag 3 is the prohibited state, the strength determination unit 12 determines the signal strength of the received detection signal when the detection signal is received from at least one of the 4 antenna devices, i.e., the pair of 1 st antenna devices 4 and the pair of 2 nd antenna devices 17. The strength determination unit 12 determines that the signal strengths of the detection signals from the pair of 1 st antenna devices 4 and the pair of 2 nd antenna devices 17 are both equal to or greater than the 2 nd threshold value. When the signal strength of at least any one of the received detection signals is equal to or greater than the 2 nd threshold, the response control unit 13 maintains the state of the wireless tag 3 in the prohibition state.
The user further passes in the passage 16 of the door 15. The user passes through the location (5). Both distances between the point (5) and the pair of first antenna devices 1 are R0 or more. Both distances between the point (5) and the pair of 2 nd antenna devices 17 are shorter than R1. At this time, the receiving unit 11 does not receive the detection signal from either of the pair of first antenna devices 4. On the other hand, the receiving unit 11 receives detection signals from both of the pair of 2 nd antenna devices 17. At this time, the intensity determination unit 12 determines the signal intensity of the received detection signal. The strength determination unit 12 determines that both of the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 are equal to or greater than the 1 st threshold. Therefore, both the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 are equal to or greater than the 2 nd threshold value. At this time, the response control unit 13 maintains the state of the wireless tag 3 in the prohibition state. At this time, since the state of the wireless tag 3 is the prohibited state, the response control unit 13 does not cause the transmission unit 14 to transmit the response signal even if both the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 are equal to or greater than the 1 st threshold.
The user passes through the passage 16 of the door 15. The user passes through the location (6). Both distances between the spot (6) and the pair of first antenna devices 1 (4) are R0 or more. Both distances between the spot (6) and the pair of 2 nd antenna devices 17 are shorter than R2 and are R1 or more. At this time, the receiving unit 11 does not receive the detection signal from either of the pair of first antenna devices 4. On the other hand, the receiving unit 11 receives the detection signal from both the 2 nd antenna devices 17. At this time, the intensity determination unit 12 determines the signal intensity of the received detection signal. The strength determination unit 12 determines that both of the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 are equal to or greater than the 2 nd threshold value. At this time, the response control unit 13 maintains the state of the wireless tag 3 in the prohibition state.
The user leaves the door 15 inside the management area a 0. The user passes through the location (7). Both distances between the point (7) and the pair of first antenna devices 4 are R0 or more. Both distances between the spot (7) and the pair of the 2 nd antenna devices 17 are shorter than R0 and are R2 or more. At this time, the receiving unit 11 does not receive the detection signal from either of the pair of first antenna devices 4. On the other hand, the receiving unit 11 receives the detection signal from both the 2 nd antenna devices 17. At this time, the intensity determination unit 12 determines the signal intensity of the received detection signal. The strength determination unit 12 determines that both of the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 are smaller than the 2 nd threshold value. When the signal strengths of the received detection signals are all lower than the 2 nd threshold, the response control unit 13 switches the state of the wireless tag 3 to the permission state. At this time, the wireless tag 3 is outside the entrance detection area a1, and therefore the transmission unit 14 does not transmit a response signal.
The user further leaves the door 15 inside the management area a 0. The user passes through the location (8). Both distances between the point (8) and the pair of first antenna devices 4 are R0 or more. Both distances between the point (7) and the pair of 2 nd antenna devices 17 are R0 or more. At this time, the receiving unit 11 does not receive the detection signal from any of the 4 antenna devices, i.e., the pair of 1 st antenna devices 4 and the pair of 2 nd antenna devices 17. When the state of the wireless tag 3 is the prohibited state, the response control unit 13 may switch the state of the wireless tag 3 to the permitted state when the detection signal is not received from any of the 4 antenna devices.
When the user exits from the management area a0, the entry/exit management system 1 operates in the same manner as when the user enters the management area a 0. At this time, the pair of first antenna devices 4 is a pair of antenna devices close to the inner side of the management area a 0. The pair of 2 nd antenna devices 17 is a pair of antenna devices located outside the management area a 0.
Fig. 8 is a flowchart showing an operation example of the wireless tag according to embodiment 2.
In step S01, the response control unit 13 determines whether or not the state of the wireless tag 3 is a prohibition state. If the determination result is "no", the operation of the wireless tag 3 proceeds to step S02. If the determination result is yes, the operation of the wireless tag 3 proceeds to step S07.
In step S02, the wireless tag 3 determines whether or not the receiving unit 11 has received the detection signal from both the 1 st antenna devices 4. If the determination result is "no", the operation of the wireless tag 3 proceeds to step S01. If the determination result is yes, the operation of the wireless tag 3 proceeds to step S03.
In step S03, the intensity determination unit 12 determines the intensities of both the detection signals received by the reception unit 11. After that, the operation of the wireless tag 3 proceeds to step S04.
In step S04, the intensity determination unit 12 determines whether or not both of the signal intensities of the received detection signals are equal to or greater than the 1 st threshold. If the determination result is "no", the operation of the wireless tag 3 proceeds to step S01. If the determination result is yes, the operation of the wireless tag 3 proceeds to step S05.
In step S05, the transmission unit 14 transmits a response signal. After that, the operation of the wireless tag 3 proceeds to step S06.
In step S06, the response control unit 13 switches the state of the wireless tag 3 to the prohibition state. After that, the operation of the wireless tag 3 proceeds to step S01.
In step S07, the wireless tag 3 determines whether the receiving unit 11 has received a detection signal from at least one of the pair of the 1 st antenna device 4 and the pair of the 2 nd antenna devices 17. If the determination result is "no", the operation of the wireless tag 3 proceeds to step S10. If the determination result is yes, the operation of the wireless tag 3 proceeds to step S08.
In step S08, the intensity determination unit 12 determines the intensity of the detection signal received by the reception unit 11. After that, the operation of the wireless tag 3 proceeds to step S09.
In step S09, the intensity determination unit 12 determines whether or not the signal intensity of at least one of the detection signals received by the reception unit 11 is equal to or greater than the 2 nd threshold. If the determination result is yes, the operation of the wireless tag 3 proceeds to step S01. If the determination result is "no", the operation of the wireless tag 3 proceeds to step S10.
In step S10, the response control unit 13 switches the state of the wireless tag 3 to the permission state. After that, the operation of the wireless tag 3 proceeds to step S01.
As described above, in the wireless tag 3 according to embodiment 2, the receiving unit 11 receives the detection signals transmitted to the other side by the pair of second antenna devices 17. The pair of 2 nd antenna devices 17 are disposed on both sides of the center of the passage 16 at positions closer to the exit side of the door 15 than the pair of 1 st antenna devices 4. The transmission unit 14 is prohibited from transmitting the response signal after transmitting the response signal. The transmission unit 14 cancels the prohibition of the transmission of the response signal based on the signal strength of the detection signal transmitted by at least one of the pair of the 1 st antenna devices 4 and the pair of the 2 nd antenna devices 17.
Thus, the transmission unit 14 does not retransmit the response signal while the user passes through the passage 16 of the door 15. Therefore, in the wireless tag 3, power consumption is suppressed. Even when the user stops in the middle of the passage 16, the wireless tag 3 can detect the stop based on the signal intensity of the detection signal. Therefore, even if the user passes through a region where the signal strength of the detection signal of the antenna device on the exit side of the door 15 is large after the user stops in the passage 16, the transmission unit 14 does not retransmit the response signal. Here, in the entrance/exit management system 1, the response signal in response to the detection signal from the antenna device on the entrance side of the door 15 is received by the antenna device on the entrance side of the door 15, and the passage of the user is detected. In the entry/exit management system 1, the response signal in response to the detection signal from the antenna device on the exit side of the door 15 is received by the antenna device on the exit side of the door 15, and erroneous detection of entry into the management area a0 as exit is suppressed.
The transmission unit 14 cancels the prohibition of the transmission of the response signal when the signal strength of the detection signal transmitted by both the pair of 1 st antenna devices 4 and the pair of 2 nd antenna devices 17 is lower than the 2 nd threshold value. The 2 nd threshold is a preset value lower than the 1 st threshold.
The prohibition of the transmission of the response signal is released in the area where the transmitter 14 does not retransmit the response signal. This enables the direction of the user's traffic to be detected with higher accuracy.
The transmission unit 14 cancels the prohibition of the transmission of the response signal when the detection signals transmitted by both the pair of the 1 st antenna devices 4 and the pair of the 2 nd antenna devices 17 are not detected.
Thereby, the transmission of the response signal by the transmission unit 14 is controlled regardless of the 2 nd threshold. Thereby, the parameter set in the wireless tag 3 is not increased. Therefore, the setting of the entry/exit management system 1 is not easily complicated. In this case, the wireless tag 3 may control transmission of the response signal without comparing the signal strength of the received detection signal with the 2 nd threshold value.
In addition, when the propagation range of the detection signal is long for the gate 15, the propagation range of the detection signal from the pair of 1 st antenna devices 4 and the propagation range of the detection signal from the pair of 2 nd antenna devices 17 may not overlap. In this case, when the state of the wireless tag 3 is the prohibited state, the response control unit 13 may maintain the prohibited state until at least one of the signal strengths of the detection signals from the pair of 2 nd antenna devices 17 becomes equal to or greater than the 2 nd threshold value. Thus, even if there is a region in which none of the detection signals from the 4 antenna devices is received by the receiving unit 11 in the middle of the passage 16 of the door 15, the response control unit 13 does not switch the state of the wireless tag 3 to the permission state in the middle of the passage 16. Therefore, even in the long door 15, the direction of passage of the user can be detected with higher accuracy.
In addition, the 4 antenna devices may also transmit the detection signals in sequence, so as to avoid interference of the detection signals. At this time, the response control unit 13 may control the state of the wireless tag 3 based on, for example, the signal strength of the detection signals received from each of the 4 antenna devices during one cycle in which the detection signals are sequentially transmitted. Further, the 4 antenna devices may transmit detection signals having different frequencies from each other so as to avoid interference of the detection signals.
Industrial applicability
The entry and exit management system of the present invention can be applied to a management area for managing entry and exit of a user. The wireless tag of the present invention can be applied to the entry and exit management system.
Description of the reference symbols
The system comprises an access management system 1, an access management device 2, a wireless tag 3, a1 st antenna device 4, a 5 secondary control device, a checking device 6, an opening and closing device 7, a main control device 8, a transmitting antenna 9, a receiving antenna 10, a receiving part 11, a strength judging part 12, a response control part 13, a transmitting part 14, a door 15, a channel 16, a2 nd antenna device 17, hardware 1a, a processor 1b, a memory 1C, an A0 management area, an A1 entering a detection area, an A2 departing from the detection area and a C center line.
Claims (5)
1. A wireless tag for an entry and exit management system, wherein,
the wireless tag of the entry and exit management system includes:
a receiving unit that receives detection signals transmitted to the other side by a pair of first antenna devices 1, wherein the pair of first antenna devices 1 are disposed on both sides with a center of a passage of a door provided at a boundary of a management area for managing entrance and exit of a user;
an intensity determination unit that determines the signal intensity of the detection signal received by the reception unit; and
and a transmitting unit that transmits a response signal when the intensity determination unit determines that both of the signal intensities of the detection signals transmitted from the pair of 1 st antenna devices are equal to or greater than a preset 1 st threshold.
2. The wireless tag of entry and exit management system of claim 1,
the receiving unit receives detection signals transmitted to the other side by a pair of 2 nd antenna devices, wherein the pair of 2 nd antenna devices are arranged on both sides of the door at positions closer to the exit side of the door than the pair of 1 st antenna devices with a center of the passage therebetween,
the transmission unit prohibits transmission of the response signal after transmission of the response signal, and cancels the prohibition of transmission of the response signal based on a signal strength of a detection signal transmitted by at least one of the pair of the 1 st antenna device and the pair of the 2 nd antenna devices.
3. The wireless tag of entry and exit management system of claim 2,
the transmission unit cancels the prohibition of transmission of the response signal when both the signal strengths of the detection signals transmitted by the pair of 1 st antenna devices and the pair of 2 nd antenna devices are lower than a preset 2 nd threshold value lower than the 1 st threshold value.
4. The wireless tag of entry and exit management system of claim 2,
the transmission unit cancels the prohibition of transmission of the response signal when the detection signals transmitted by the pair of the 1 st antenna devices and the pair of the 2 nd antenna devices are not detected.
5. An entry and exit management system, wherein,
the entry and exit management system includes:
a pair of 1 st antenna devices which are disposed on both sides with a center of a passage of a door provided at a boundary of a management area for managing entrance and exit of a user and transmit a detection signal to the other side;
a wireless tag that transmits a response signal when both of the signal strengths of the detection signals transmitted from the pair of first antenna devices 1 are determined to be signal strengths equal to or greater than a preset 1 st threshold; and
and a passage detection device for detecting passage of a user holding the wireless tag when at least one of the pair of the 1 st antenna devices receives the response signal from the wireless tag.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/032860 WO2021033317A1 (en) | 2019-08-22 | 2019-08-22 | Wireless tag of entry/exit management system, and entry/exit management system |
Publications (2)
| Publication Number | Publication Date |
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| CN114245914A true CN114245914A (en) | 2022-03-25 |
| CN114245914B CN114245914B (en) | 2023-09-22 |
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| CN201980099314.2A Active CN114245914B (en) | 2019-08-22 | 2019-08-22 | Wireless tag for access management system and access management system |
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|---|---|
| JP (1) | JP7248129B2 (en) |
| CN (1) | CN114245914B (en) |
| WO (1) | WO2021033317A1 (en) |
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| WO2017187603A1 (en) * | 2016-04-28 | 2017-11-02 | 三菱電機株式会社 | Entry/exit management system |
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2019
- 2019-08-22 JP JP2021540611A patent/JP7248129B2/en active Active
- 2019-08-22 CN CN201980099314.2A patent/CN114245914B/en active Active
- 2019-08-22 WO PCT/JP2019/032860 patent/WO2021033317A1/en active Application Filing
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| CN101622818A (en) * | 2007-02-16 | 2010-01-06 | 株式会社日立制作所 | IC tag system |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7248129B2 (en) | 2023-03-29 |
| JPWO2021033317A1 (en) | 2021-12-09 |
| CN114245914B (en) | 2023-09-22 |
| WO2021033317A1 (en) | 2021-02-25 |
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