CN111886512B - Traffic monitoring system and RF tag - Google Patents
Traffic monitoring system and RF tag Download PDFInfo
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- CN111886512B CN111886512B CN201880091421.6A CN201880091421A CN111886512B CN 111886512 B CN111886512 B CN 111886512B CN 201880091421 A CN201880091421 A CN 201880091421A CN 111886512 B CN111886512 B CN 111886512B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
Abstract
The traffic monitoring system of the present invention comprises: an RF tag which is carried by a user and has inherent tag identification information; more than 2N readers arranged in the passing direction of the road and provided with intrinsic reader-writer identification information, wherein the road is provided with a passing route of a 1 st route and a 2 nd route; a reception intensity measuring unit that measures a reception intensity of an interrogation radio wave received by the RF tag from the reader/writer; a route determination unit that determines whether the user is located on the 1 st route and whether the user is located on the 2 nd route, based on the tag identification information, the reader/writer identification information, and the reception intensity of each of the inquiry radio waves received by the RF tag during a predetermined route determination period; and a meandering determination unit that determines that the user is meandering through the road when the number of route movements of the user from one of the 1 st route and the 2 nd route to the other route is equal to or greater than a meandering threshold value within a predetermined meandering determination period.
Description
Technical Field
The present invention relates to a traffic monitoring system and an RF tag.
Background
The conventional movement detection system includes a master and a slave that transmits and receives radio signals to and from the master, and detects movement of the slave, and is characterized in that the master includes a slave movement determination unit that determines movement of the slave based on a change in an intensity level of the radio signals transmitted and received between the master and the slave, and a radio signal cutting unit that reduces or cuts off the radio signals transmitted and received between the master and the slave is provided in association with the master, and is capable of transmitting and receiving the radio signals between the master and the slave when the slave is located in a 1 st area, and is weakened or cut off by the radio signal cutting unit when the radio signal is located in a 2 nd area adjacent to the 1 st area, and is higher than a 1 st prescribed level when the radio signal is transmitted and received between the master and the slave, and is higher than the 1 st area when the radio signal is transmitted and higher than the 1 st area, the radio signal is transmitted and received between the master and the slave is higher than the 2 nd area (for example, the patent reference is made to the 1 st area, and the radio signal is higher than the 1 st area).
In the above-described movement detection system, a radio signal cutting means for reducing (or cutting off) a radio signal transmitted and received between the master and slave is provided, and when the slave is located in the 1 st area, the transmission and reception of the radio signal between the master and slave can be performed, and when the slave is located in the 2 nd area adjacent to the 1 st area, the radio signal transmitted and received between the master and slave is reduced (or cut off) by the radio signal cutting means. Thus, when the slave unit moves from the 1 st area to the 2 nd area (or from the 2 nd area to the 1 st area), the decrease in the intensity level of the radio signal is greater than the 1 st predetermined level (or the increase in the intensity level is greater than the 2 nd predetermined level), and the change in the intensity level of the radio signal can be reliably detected by the master unit. Therefore, the movement of the slave unit between the detection area and the non-detection area can be detected with high accuracy.
Next, a conventional motion detection device is characterized by comprising: at least one camera device; a storage unit that stores face information of a subject and attribute information related to dangerous actions in association with each other; a face collation unit that detects a face image from the image captured by the imaging device and collates the detected face image with the face information stored in the storage unit, thereby specifying the subject person; an action feature detection unit that detects a feature of an action of the subject from an image captured by the imaging device; and a dangerous action detection unit that compares the attribute information stored in the storage unit in correspondence with the subject person specified by the face comparison unit with the characteristics of the action detected by the action characteristic detection unit, and detects that the subject person has performed a dangerous action, wherein zigzag walking, which is the number of times of crossing of left and right side lines displayed on the bottom surface of the door, is detected as a characteristic amount of the action of the subject person from time-series data of the face position of the subject person at the door (for example, refer to patent document 2).
In the above-described action detection device, since only dangerous actions of the subject person can be detected, normal actions are not the subject to be notified to the staff. Further, since the dangerous actions of the subject person, which are precursors of the event or the accident, can be detected, the dangerous actions of the subject person can be presented to the staff at a stage before the event or the accident occurs. Therefore, it is possible to reduce the labor cost required for the facility and reduce the occurrence risk of events and accidents in the facility.
Prior art documents
Patent literature
Patent document 1: japanese patent laid-open publication No. 2013-7598
Patent document 2: japanese patent application laid-open No. 2011-34357
Disclosure of Invention
Problems to be solved by the invention
However, in the above-described movement detection system, since the detection area of the host machine is limited, it is impossible to determine whether the host machine is passing along the road in a meandering manner or not in a meandering manner on the road longer than the detection area of the host machine.
In addition, in the above-described behavior detection device, the image pickup device is expensive, and it is necessary to display left and right lines on the bottom surface of the door to detect zigzag walking.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a traffic management system capable of determining whether a user is traveling in a road in a meandering manner or in a non-meandering manner.
Means for solving the problems
The traffic monitoring system of the present invention comprises: an RF tag which is carried by a user and has inherent tag identification information; more than 2N readers arranged in the passing direction of the road and provided with intrinsic reader-writer identification information, wherein the road is provided with a passing route of a 1 st route and a 2 nd route; a reception intensity measuring unit that measures a reception intensity of an interrogation radio wave received by the RF tag from the reader/writer; a route determination unit that determines whether or not the user is located on the 1 st route and whether or not the user is located on the 2 nd route, based on the reader/writer identification information of the reader/writer that transmitted the query wave, the tag identification information of the RF tag that received the query wave, and the reception intensity of the query wave, for each of the query waves received by the RF tag; and a meandering determination unit that determines whether the user is meandering or non-meandering in the road, based on the number of route movements of the user from one of the 1 st route and the 2 nd route to the other route.
Effects of the invention
According to the traffic management device of the present invention, it is possible to determine whether a user is passing in a winding manner or not by measuring the intensity of an electric wave received from an RF tag that is transmitted from a plurality of readers/writers arranged in the passing direction of a road and carried by the user.
Drawings
Fig. 1 is a schematic diagram of a traffic management device according to embodiment 1 of the present invention.
Fig. 2 is a plan view of a road to which the traffic control device according to embodiment 1 of the present invention is applied.
Fig. 3 is a plan view of a road to which the traffic control device according to embodiment 1 of the present invention is applied.
Fig. 4 is a block diagram of a traffic management device according to embodiment 1 of the present invention.
Fig. 5 is a flowchart showing the operation of the traffic management device according to embodiment 1 of the present invention.
Fig. 6 is a schematic diagram of a traffic management device according to embodiment 2 of the present invention.
Fig. 7 is a plan view of a road to which the traffic control device according to embodiment 2 of the present invention is applied.
Fig. 8 is a plan view of a road to which the traffic management device according to embodiment 2 of the present invention is applied.
Fig. 9 is a block diagram of a traffic management device according to embodiment 2 of the present invention.
Fig. 10 is a flowchart showing the operation of the traffic management device according to embodiment 2 of the present invention.
Fig. 11 is a plan view of a road to which the traffic control device according to embodiment 1 of the present invention is applied.
Fig. 12 is a plan view of a road to which the traffic control device according to embodiment 1 of the present invention is applied.
Fig. 13 is a plan view of a road to which the traffic control device according to embodiment 2 of the present invention is applied.
Fig. 14 is a plan view of a road to which the traffic control device according to embodiment 2 of the present invention is applied.
Fig. 15 is a block diagram of a traffic management device to which the RF tag according to embodiment 3 of the present invention is applied.
Fig. 16 is a flowchart showing the operation of the traffic management device to which the RF tag according to embodiment 3 of the present invention is applied.
Detailed Description
Hereinafter, preferred embodiments of the passage management device and the RF tag according to the present invention will be described with reference to the drawings.
Fig. 1 is a schematic diagram of a traffic management device according to embodiment 1 of the present invention.
As shown in fig. 1, the traffic management device 1 is a traffic management device as follows: the road 20 is provided with an RF tag 100, a reader/writer 200, and a host device 300, wherein when a user 10 carrying the RF tag 100 passes through the road 20, the host device 300 determines whether the user 10 passes through the road 20 in a meandering manner or does not pass through the road in a meandering manner, based on the intensity of an electric wave transmitted from the reader/writer 200 and received by the RF tag 100, and the road 20 is provided with a plurality of reader/writers 200 arranged in the passing direction.
Here, for example, the user 10 is a person who wanders like a psychotic patient or a dementia patient, the manager 11 is a person who manages the user 10 like a nurse or a nursing staff, and the road 20 is a road through which the user 10 passes in facilities such as a hospital or a senior citizen institution.
In addition, the RF tag described above is sometimes also referred to as an IC tag or an RFID tag, but in the following description, terms such as an RF tag are used.
The reader/writer described above does not necessarily have both a function of reading data from the RF tag (reader function) and a function of writing data to the RF tag (writer function), and may have at least one function.
Next, the following describes, with reference to fig. 2 and 3, the route guidance determination of 2 routes provided on the road 20 and the user 10 who is traveling on the road 20 in the traffic management device 1.
Fig. 2 and 3 are plan views of roads to which the traffic control device according to embodiment 1 of the present invention is applied. Fig. 2 shows a 1 st detection range 21, a 2 nd detection range 22, and a 3 rd detection range 23, which are 3 detection ranges of the reader/writer 200 nearest to the user 10. Fig. 3 shows the 1 st route 24 and the 2 nd route 25 as 2 transit routes of the road 20.
The reader/writer 200 is arranged on one side of the road 20 in the passing direction, and has 2 detection thresholds. The 2 detection thresholds are a 1 st detection threshold and a 2 nd detection threshold which is a value equal to or lower than the 1 st detection threshold.
The range where the intensity of the radio wave transmitted by the reader/writer 200 and received by the RF tag 100 is equal to or greater than the 1 st detection threshold is the 1 st detection range 21, the range where the intensity is smaller than the 1 st detection threshold and equal to or greater than the 2 nd detection threshold is the 2 nd detection range 22, and the range where the intensity is smaller than the 2 nd detection threshold is the 3 rd detection range 23. In other words, according to the 1 st detection threshold and the 2 nd detection threshold, the 1 st detection range 21, the 2 nd detection range 22, and the 3 rd detection range 23, which are 3 detection ranges, are set to the reader/writer 200. Fig. 2 shows a case where the user 10 is located in the 1 st detection range 21 of the nearest reader/writer 200.
The 1 st route 24 is a range in which the 1 st detection range 21 of all the readers/writers 200 are combined, and the 2 nd route 25 is a range in which the 1 st detection range 21 and the 2 nd detection range 22 of all the readers/writers 200 are removed from the range in which the 3 rd detection range 23 of all the readers/writers 200 are combined. In other words, the 1 st route 24 and the 2 nd route 25 as 2 transit routes are provided for the road 20 according to the 1 st detection range 21, the 2 nd detection range 22, and the 3 rd detection range 23 of the overall reader/writer 200. Fig. 3 shows the user 10 in the 1 st route 24.
That is, the 1 st route 24 and the 2 nd route 25 as 2 transit routes are set to the road 20 according to the 1 st detection threshold and the 2 nd detection threshold as 2 detection thresholds.
When the user 10 carrying the RF tag 100 is located on the road 20, if the intensity of one or more electric waves transmitted from the reader/writer 200 and received by the RF tag 100 is equal to or higher than the 1 st detection threshold, it is determined that the user 10 is located on the 1 st route 24, and if the intensity of all electric waves transmitted from the reader/writer 200 and received by the RF tag 100 is lower than the 2 nd detection threshold, it is determined that the user 10 is located on the 2 nd route 25.
When the user 10 passes through the road 20, the passing route in which the user 10 is located changes with time, and when the number of times the user 10 moves from one of the 1 st route 24 and the 2 nd route 25 to the other, that is, the number of route movements is equal to or greater than a meandering threshold, it is determined that the user 10 passes through the road 20 in a meandering manner, and when the number of route movements is less than the meandering threshold, it is determined that the user 10 does not pass through the road 20 in a meandering manner. In fig. 3, the number of route movements of the passing path of the user 10 is 4. At this time, if the meandering threshold value is 4 or less, it is determined that the user 10 is meandering through the road 20, and if the meandering threshold value is greater than 4, it is determined that the user 10 is not meandering through the road 20.
Next, the hardware configuration of the traffic management device 1 will be described with reference to fig. 4. Fig. 4 is a block diagram of a traffic management device according to embodiment 1 of the present invention. As shown in fig. 4, the traffic management device 1 has an RF tag 100, a reader/writer 200, and a host device 300. The RF tag 100, the reader/writer 200, and the host device 300 will be described in this order.
The RF tag 100 includes a storage unit 110, a communication unit 120, and a reception intensity measurement unit 130. The storage unit 110 stores unique tag identification information. The communication section 120 modulates data into a communication signal and transmits it through an electric wave, and demodulates the communication signal received through the electric wave into data. The reception intensity measuring unit 130 measures the reception intensity as the intensity of the received electric wave.
The reader/writer 200 has a storage unit 210, a 1 st communication unit 220, a reception intensity comparison unit 230, and a 2 nd communication unit 240. The storage unit 210 stores unique reader/writer identification information, a 1 st detection threshold value, and a 2 nd detection threshold value. The 1 st communication section 220 modulates data into a communication signal and transmits it through an electric wave, and demodulates the communication signal received through the electric wave into data. The reception intensity comparing unit 230 compares the reception intensity measured by the reception intensity measuring unit 130 with the 1 st detection threshold and the 2 nd detection threshold stored in the storage unit 210. The 2 nd communication unit 240 modulates data into a communication signal and transmits the communication signal to the host device 300. The communication signal transmitted from the 2 nd communication unit 240 to the higher-level device 300 may be wired or wireless.
The higher-level device 300 includes a communication unit 310, a storage unit 320, a route determination unit 330, a movement count unit 340, a meandering determination unit 350, and a notification unit 360. The communication section 310 demodulates the communication signal received from the reader/writer 200 into data. The storage unit 320 stores user setting information in which tag identification information, user identification information of the user 10, and a meandering threshold are associated with each other, and detection information, which will be described later, received by the communication unit 310 from the reader/writer 200. The route determination unit 330 determines whether the user 10 is located on the 1 st route 24 and whether the user 10 is located on the 2 nd route 25. The movement count unit 340 counts the number of times the user 10 moves from one of the 1 st route 24 and the 2 nd route 25 to the other, that is, the number of route movements. The meandering determination unit 350 determines whether the user 10 is passing around the road 20 in a meandering manner or not. When the meandering determination unit 350 determines that the user 10 is meandering through the road 20, the notification unit 360 notifies the user of the meandering.
Next, a flow of determining the meandering of the user 10 traveling on the road 20 by the traffic management device 1 will be described with reference to fig. 5. Fig. 5 is a flowchart showing the operation of the traffic management device according to embodiment 1 of the present invention. The operation of the RF tag 100, the reader/writer 200, and the host device 300 included in the traffic management device 1 will be described in order.
First, the operation of the RF tag 100 will be described in order. When the RF tag 100 carried by the user 10 comes within the communicable range of the reader/writer 200, the communication unit 120 receives an inquiry radio wave which is a radio wave including reader/writer identification information transmitted from the reader/writer 200 (S101 in fig. 5). The reception intensity measuring unit 130 measures the reception intensity of the inquiry radio wave received by the communication unit 120 (S102 in fig. 5). The communication unit 120 transmits a response wave including response information in which the reception time, which is the time when the communication unit 120 receives the inquiry wave, the reception intensity of the inquiry wave measured by the reception intensity measuring unit 130, and the reader/writer identification information included in the inquiry wave received by the communication unit 120 are associated with the tag identification information stored in the storage unit 110 (S103 in fig. 5).
Next, the operation of the reader/writer 200 will be described in order. The 1 st communication unit 220 transmits an inquiry radio wave as a radio wave including the reader/writer identification information stored in the storage unit 210 (S201 in fig. 5). When the 1 st communication unit 220 receives the response radio wave including the same reader/writer identification information as the reader/writer identification information stored in the storage unit 210, the reception intensity comparison unit 230 starts comparison (S202 in fig. 5). The reception intensity comparing unit 230 compares whether or not the reception intensity included in the response radio wave received by the 1 st communication unit 220 is equal to or higher than the 1 st detection threshold stored in the storage unit 210 and is smaller than the 2 nd detection threshold stored in the storage unit 210 (S203 in fig. 5). The 2 nd communication unit 240 transmits a detection signal including detection information in which tag identification information, reception time and reception intensity included in the response radio wave received by the 1 st communication unit 220 and the result of comparison between the reader/writer identification information stored in the storage unit 210 and the reception intensity comparison unit 230 are associated with each other to the higher-level device 300 (S204 in fig. 5).
Finally, the operation of the host device 300 will be described in order. The communication unit 310 receives the detection signal transmitted from the reader/writer 200 (S301 in fig. 5). The storage unit 320 stores the detection information included in the detection signal received by the communication unit 310. The route determination unit 330 starts the determination every time a route determination period described later elapses (S302 in fig. 5). Among the detection information stored in the storage unit 320, the tag identification information of the RF tag 100 carried by the user 10 and the detection information corresponding to the reception time during the route determination period described later, if one or more reception intensities are equal to or more than the 1 st detection threshold, the route determination unit 330 determines that the user 10 is located on the 1 st route 24, and if all the reception intensities are less than the 2 nd detection threshold, the route determination unit 330 determines that the user 10 is located on the 2 nd route 25 (S303 in fig. 5). When the route determination unit 330 determines that the user 10 is on the traffic route, and the traffic route thus determined is different from the traffic route determined last time, the movement count unit 340 counts the number of route movements of the user 10 by adding 1 (S304 in fig. 5). When the number of route movements of the user 10 counted by the number-of-movements counting unit 340 is equal to or greater than the meandering threshold value of the user 10 stored in the storage unit 320, the meandering determination unit 350 determines that the user 10 is meandering through the road 20, and when the number of route movements of the user 10 counted by the number-of-movements counting unit 340 is smaller than the meandering threshold value of the user 10 stored in the storage unit 320, the meandering determination unit 350 determines that the user 10 is not meandering through the road 20 (S305 in fig. 5). When the meandering determination unit 350 determines that the user 10 is meandering through the road 20, the notification unit 360 notifies (S306 in fig. 5). The route movement number is counted and the meandering determination is continued until a meandering determination period described later (S307 of fig. 5) elapses, and the route movement number is initialized every time the meandering determination period described later elapses (S308 of fig. 5).
As described above, the traffic management device 1 determines the meandering of the user 10 who is traveling on the road 20.
Here, a route determination period and a meandering determination period will be described.
The route determination period is a sufficient time required for the route determination unit 330 to determine from all detection signals received by the host device 300 until all readers 200 transmit an inquiry wave, the RF tag 100 transmits a response wave to all received inquiry waves, and all readers 200 that receive the response wave transmit detection signals.
The meandering determination period is obtained by multiplying a value obtained by adding 1 to the meandering threshold value by at least the time obtained by adding the route determination period and a sufficient time required from the determination by the route determination unit 330 to the determination by the meandering determination unit 350. Further, the meandering determination period may be ended when all the readers/writers 200 no longer receive the response wave from the RF tag 100 in the route determination period, and the meandering determination period may be started when any of the readers/writers 200 receives the response wave from the RF tag 100.
According to the traffic management device of embodiment 1 of the present invention, by measuring the intensity of the electric wave received by the RF tag 100 carried by the user 10 and transmitted from the plurality of readers/writers 200 arranged on one side of the road 20 in the traffic direction, it is possible to determine whether the user 10 is passing in a meandering manner or not in a meandering manner on the road 20.
The host device 300 notifies the user 10 to pass along the road 20 in a meandering manner, and thereby can notify the manager 11.
Fig. 6 is a schematic diagram of a traffic management device according to embodiment 2 of the present invention.
As shown in fig. 6, the traffic management device 2 is a traffic management device as follows: the road 20 is provided with an RF tag 100, a reader/writer 400, and a host device 500, wherein when a user 10 carrying the RF tag 100 passes through the road 20, the host device 500 determines whether the user 10 passes through the road 20 in a meandering manner or not according to the intensity of an electric wave transmitted from the reader/writer 400 and received by the RF tag 100, and the road 20 is provided with a plurality of reader/writers 400 arranged in the passing direction.
In embodiment 1, the reader/writer 200 is arranged on one side of the road 20 in the passing direction, but in embodiment 2, the reader/writer 400 is arranged on one side and the other side of the road 20 in the passing direction.
Next, the following describes, with reference to fig. 7 and 8, the determination of the meandering of the user 10 traveling on the road 20 and 2 traveling routes provided on the road 20 in the traffic management device 2.
Fig. 7 and 8 are plan views of roads to which the traffic control device according to embodiment 2 of the present invention is applied. Fig. 7 shows the 1 st detection range 26 as one detection range of the reader/writer 400 closest to the user 10. Fig. 8 shows the 1 st route 27 and the 2 nd route 28 as 2 transit routes of the road 20. Here, the reader/writer 400 arranged on one side of the road 20 is the 1 st reader/writer 400a, and the reader/writer 400 arranged on the other side of the road 20 is the 2 nd reader/writer 400b.
The reader 400 has a detection threshold. One detection threshold is the 1 st detection threshold.
The strength of the radio wave transmitted by the reader/writer 400 and received by the RF tag 100 is set the range above the 1 st detection threshold is the 1 st detection range 26. In other words, according to the 1 st detection threshold, the 1 st detection range 26 as one detection range is set to the reader/writer 400. Fig. 7 shows a case where the user 10 is located in the 1 st detection range 26 of the nearest reader/writer 400.
The 1 st route 27 is a range obtained by excluding the 1 st detection range 26 of all 2 nd readers/writers 400b from the range obtained by combining the 1 st detection ranges 26 of all 1 st readers/writers 400a, and the 2 nd route 28 is a range obtained by excluding the 1 st detection range 26 of all 1 st readers/writers 400a from the range obtained by combining the 1 st detection ranges 26 of all 2 nd readers/writers 400 b. In other words, the 1 st route 27 and the 2 nd route 28 as 2 traffic routes are provided for the road 20 according to the 1 st detection range 26 of all the 1 st readers 400a and the 1 st detection range 26 of all the 2 nd readers 400 b. Fig. 8 shows the user 10 in the 1 st route 27.
That is, the 1 st route 27 and the 2 nd route 28 as 2 transit routes are set to the road 20 according to the 1 st detection threshold value as one detection threshold value.
When the user 10 carrying the RF tag 100 is located on the road 20, the user 10 is determined to be located on the 1 st route 27 when the intensity of one or more of the electric waves transmitted from the 1 st reader/writer 400a and received by the RF tag 100 is equal to or higher than the 1 st detection threshold and the intensity of all of the electric waves transmitted from the 2 nd reader/writer 400b and received by the RF tag 100 is lower than the 1 st detection threshold, and the user 10 is determined to be located on the 2 nd route 28 when the intensity of all of the electric waves transmitted from the 1 st reader/writer 400a and received by the RF tag 100 is equal to or higher than the 1 st detection threshold and the intensity of one or more of the electric waves transmitted from the 2 nd reader/writer 400b and received by the RF tag 100 is lower than the 1 st detection threshold.
When the user 10 passes through the road 20, the passing route in which the user 10 is located changes with time, and when the number of times the user 10 moves from one of the 1 st route 27 and the 2 nd route 28 to the other, that is, the number of route movements is equal to or greater than a meandering threshold, it is determined that the user 10 passes through the road 20 in a meandering manner, and when the number of route movements is less than the meandering threshold, it is determined that the user 10 does not pass through the road 20 in a meandering manner. In fig. 8, the number of route movements of the passing path of the user 10 is 4. At this time, if the meandering threshold value is 4 or less, it is determined that the user 10 is meandering through the road 20, and if the meandering threshold value is greater than 4, it is determined that the user 10 is not meandering through the road 20.
Next, the hardware configuration of the traffic management device 2 will be described with reference to fig. 9. Fig. 9 is a block diagram of a traffic management device according to embodiment 2 of the present invention. As shown in fig. 9, the traffic management device 2 includes an RF tag 100, a reader/writer 400, and a host device 500. The RF tag 100, the reader/writer 400, and the host device 500 will be described in this order.
The RF tag 100 includes a storage unit 110, a communication unit 120, and a reception intensity measurement unit 130. The storage unit 110 stores unique tag identification information. The communication section 120 modulates data into a communication signal and transmits it through an electric wave, and demodulates the communication signal received through the electric wave into data. The reception intensity measuring unit 130 measures the reception intensity as the intensity of the received electric wave.
The reader/writer 400 has a storage section 410, a 1 st communication section 420, a reception intensity comparison section 430, and a 2 nd communication section 440. The storage unit 410 stores unique reader/writer identification information and the 1 st detection threshold value. The 1 st communication unit 420 modulates data into a communication signal and transmits the communication signal through radio waves, and demodulates the communication signal received through radio waves into data. The reception intensity comparing unit 430 compares the reception intensity measured by the reception intensity measuring unit 130 with the 1 st detection threshold stored in the storage unit 410. The 2 nd communication unit 440 modulates data into a communication signal and transmits the communication signal to the host device 500. The communication signal transmitted from the 2 nd communication unit 440 to the higher-level device 500 may be wired or wireless.
The upper device 500 includes a communication unit 510, a storage unit 520, a route determination unit 530, a movement count unit 540, a meandering determination unit 550, and a notification unit 560. The communication unit 510 demodulates a communication signal received from the reader/writer 400 into data. The storage unit 520 stores user setting information in which tag identification information, user identification information of the user 10, and a meandering threshold are associated with each other, and detection information, which will be described later, received by the communication unit 510 from the reader/writer 400. The route determination unit 530 determines whether the user 10 is located on the 1 st route 27 and whether the user 10 is located on the 2 nd route 28. The movement count unit 540 counts the number of times the user 10 moves from one of the 1 st route 27 and the 2 nd route 28 to the other, that is, the number of route movements. The meandering determination unit 550 determines whether the user 10 is passing around the road 20 in a meandering manner or not. When the meandering determination unit 550 determines that the user 10 is meandering through the road 20, the notification unit 560 notifies the user.
Next, a flow of determining the meandering of the user 10 traveling on the road 20 by the traffic management device 2 will be described with reference to fig. 10. Fig. 10 is a flowchart showing the operation of the traffic management device according to embodiment 2 of the present invention. The operation of the RF tag 100, the reader/writer 400, and the host device 500 included in the traffic control device 2 will be described in order.
First, the operation of the RF tag 100 will be described in order. When the RF tag 100 carried by the user 10 comes within the communicable range of the reader/writer 400, the communication unit 120 receives an inquiry radio wave which is a radio wave including reader/writer identification information transmitted from the reader/writer 400 (S111 in fig. 10). The reception intensity measuring unit 130 measures the reception intensity of the inquiry radio wave received by the communication unit 120 (S112 in fig. 10). The communication unit 120 transmits a response wave including response information in which the reader/writer identification information included in the inquiry wave received by the communication unit 120 and the tag identification information stored in the storage unit 110 are associated with each other, that is, the reception time at which the communication unit 120 receives the inquiry wave, the reception intensity of the inquiry wave measured by the reception intensity measuring unit 130 (S113 in fig. 10).
Next, the operation of the reader/writer 400 will be described in order. The 1 st communication unit 420 transmits an inquiry radio wave as a radio wave including the reader/writer identification information stored in the storage unit 410 (S401 in fig. 10). When the 1 st communication unit 420 receives the response radio wave including the same reader/writer identification information as the reader/writer identification information stored in the storage unit 410, the reception intensity comparison unit 430 starts comparison (S402 of fig. 10). The reception intensity comparing unit 430 compares whether or not the reception intensity included in the response radio wave received by the 1 st communication unit 420 is equal to or higher than the 1 st detection threshold stored in the storage unit 410 (S403 in fig. 10). The 2 nd communication unit 440 transmits a detection signal including detection information in which tag identification information, reception time and reception intensity included in the response radio wave received by the 1 st communication unit 420 and the result of comparison between the reader/writer identification information stored in the storage unit 410 and the reception intensity comparison unit 430 are associated with each other to the higher-level device 500 (S404 in fig. 10).
Finally, the operation of the host device 500 will be described in order. The communication unit 510 receives the detection signal transmitted from the reader/writer 400 (S501 in fig. 10). The storage unit 520 stores the detection information included in the detection signal received by the communication unit 510. The route determination unit 530 starts the determination every time a route determination period described later elapses (S502 in fig. 10). Among the detection information stored in the storage unit 520, which includes the tag identification information of the RF tag 100 carried by the user 10 and the detection information corresponding to the reception time during the route determination period described later, when one or more of the reception intensities of the reader/writer identification information associated with the reader/writer 400a is equal to or more than the 1 st detection threshold and the total reception intensity of the reader/writer identification information associated with the reader/writer 400b is less than the 1 st detection threshold, the route determination unit 530 determines that the user 10 is located on the 1 st route 27, and when the total reception intensity of the reader/writer identification information associated with the reader/writer 400a is less than the 1 st detection threshold and the total reception intensity of the reader/writer identification information associated with the reader/writer 400b is equal to or more than the 1 st detection threshold, the route determination unit 530 determines that the user 10 is located on the 2 nd route 28 (S503 of fig. 10). When the route determination unit 530 determines that the user 10 is on the traffic route, and the traffic route determined this time is different from the traffic route determined last time, the movement count unit 540 counts the number of route movements of the user 10 by adding 1 (S504 in fig. 10). When the number of route movements of the user 10 counted by the number-of-movements counting unit 540 is equal to or greater than the meandering threshold value of the user 10 stored in the storage unit 520, the meandering determination unit 550 determines that the user 10 is meandering through the road 20, and when the number of route movements of the user 10 counted by the number-of-movements counting unit 540 is smaller than the meandering threshold value of the user 10 stored in the storage unit 520, the meandering determination unit 550 determines that the user 10 is not meandering through the road 20 (S505 of fig. 10). When the meandering determination unit 550 determines that the user 10 is meandering through the road 20, the notification unit 560 notifies (S506 in fig. 10). The route movement number is counted and the meandering determination is continued until a meandering determination period described later is passed (S507 in fig. 10), and the route movement number is initialized every time the meandering determination period described later is passed (S508 in fig. 10).
As described above, the traffic management device 2 determines the meandering of the user 10 who is traveling on the road 20.
Here, a route determination period and a meandering determination period will be described.
The route determination period is a sufficient time required for the route determination unit 530 to determine from all detection signals received by the host device 500 until all readers 400 transmit the query wave, the RF tag 100 transmits the response wave to all the received query wave, and all the readers 400 that receive the response wave transmit the detection signal.
The meandering determination period is obtained by multiplying a value obtained by adding 1 to the meandering threshold value by at least the time obtained by adding the route determination period and a sufficient time required from the determination by the route determination unit 530 to the determination by the meandering determination unit 550. Further, the meandering determination period may be ended when all the readers/writers 400 no longer receive the response wave from the RF tag 100 during the route determination period, and the meandering determination period may be started when any of the readers/writers 400 receives the response wave from the RF tag 100.
According to the traffic management device of embodiment 2 of the present invention, by measuring the intensity of the electric wave received by the RF tag 100 carried by the user 10 transmitted from the plurality of readers 400 arranged on one side and the other side of the road 20 in the traffic direction, it is possible to determine whether the user 10 is passing in a meandering manner or not in a meandering manner on the road 20, as in embodiment 1.
In addition, as in embodiment 1, the host device 300 notifies the user 10 to pass by the road 20 in a meandering manner, and thereby can notify the manager 11.
In addition, according to the traffic management device of embodiment 2 of the present invention, since the 1 st reader/writer 400a detects that the user 10 carrying the RF tag 100 is located on the 1 st route 27 and the 2 nd reader/writer 400b detects that the user 10 carrying the RF tag 100 is located on the 2 nd route 28, the wider the width of the road 20, the more suitable the determination of meandering is compared with the traffic management device of embodiment 1.
In embodiment 1 and embodiment 2, the RF tag 100 has the reception intensity measuring unit 130 to measure the reception intensity of the interrogation radio wave, but the reader/writer 200 or the reader/writer 400 may have the reception intensity measuring unit to measure the reception intensity of the response radio wave. In this case, the time from the transmission of the query wave by the reader/writer 200 or the reader/writer 400 until the determination of the reception intensity can be shortened.
In embodiment 1 and embodiment 2, since the reader/writer 200 or the reader/writer 400 stores the reader/writer identification information and the detection threshold value, and the detection threshold value can be set individually for each reader/ writer 200 or 400, it is possible to set a traffic route corresponding to the width of the road 20 on the road 20 whose width is not fixed.
For example, fig. 11 and 12 show a case where the traffic management device 1 is applied to a road 20 whose width is not fixed. Fig. 11 and 12 are plan views of roads to which the traffic control device according to embodiment 1 of the present invention is applied.
In fig. 11, by increasing the 1 st detection threshold and the 2 nd detection threshold of the reader/writer 200 provided at the portion of the road 20 where the width is wide with respect to the reader/writer 200 provided at the portion of the road 20 where the width is wide, the 1 st detection range 21, the 2 nd detection range 22, and the 3 rd detection range 23 of the reader/writer 200 provided at the portion of the road 20 where the width is narrow can be reduced with respect to the reader/writer 200 provided at the portion of the road 20 where the width is wide. Thus, in fig. 12, the ratio of the 1 st route to the 2 nd route can be equalized between the portion where the width of the road 20 is narrow and the portion where the width of the road 20 is wide, and therefore, the meandering of the user 10 can be detected with high accuracy.
In embodiment 1 and embodiment 2, since the detection threshold can be set individually for each reader/ writer 200 or 400, the detection range of the reader/ writer 200 or 400 can be easily set.
For example, when the 1 st detection range 21 is set in the traffic management device 1, the 1 st detection range 21 can be easily set by measuring the radio wave intensity transmitted from the reader/writer 200 or the reader/writer 400 that sets the 1 st detection range 21 at a position that is to be the boundary between the 1 st detection range 21 and the 2 nd detection range 22, and setting the measured radio wave intensity as the 1 st detection threshold. Similarly, when the 2 nd detection range 22 and the 3 rd detection range 23 are set, the radio wave intensity transmitted from the reader/writer 200 or the reader/writer 400 that sets the 2 nd detection range 22 and the 3 rd detection range 23 is measured at a position that is intended to be the boundary between the 2 nd detection range 22 and the 3 rd detection range 23, and the measured radio wave intensity is set as the 2 nd detection threshold value, whereby the 2 nd detection range 22 and the 3 rd detection range 23 can be easily set.
In embodiment 1 and embodiment 2, the higher-level device 300 or the higher-level device 500 stores tag identification information, user identification information, and a meandering determination value in association with each other, and can set the meandering determination value for the user 10 alone, so that, for example, when the manager 11, a security guard of a facility, and a cleaner of a facility carry the RF tag 100, it is possible to increase the meandering threshold value for the manager 11, the security guard of a facility, and the cleaner of a facility without notifying meandering associated with a normal operation.
In embodiment 1 and embodiment 2, it is not necessary to include reader/writer identification information in the inquiry radio wave and the response radio wave, and each reader/ writer 200 or 400 may be capable of receiving the response radio wave including the reception intensity of the inquiry radio wave transmitted by itself. In this case, for example, each reader/writer 200 or reader/writer 400 transmits and receives radio waves in a time-division manner, whereby each reader/writer 200 or reader/writer 400 can receive response radio waves including the reception intensity of the query radio waves transmitted by itself.
In embodiment 1, the reader/writer 200 and the reader/writer 400 are provided on the road 20, but the reader/writer 200 and the reader/writer 400 may be provided not only on the wall, ceiling, or floor of the road 20, but also on the road 20 so as to be able to transmit an inquiry radio wave and receive a response radio wave transmitted from the RF tag 100 carried by the user 10 located on the road 20.
In embodiment 1, the reader/writer 200 is arranged on one side of the road 20, and in embodiment 2, the reader/writer 200 is arranged on one side and the other side of the road 20, but the reader/writer 200 and the reader/writer 4000 may be arranged in a plurality of rows on the road 20, as long as they can transmit an inquiry wave over the entire length of the road 20 and can receive a response wave transmitted from the RF tag 100 carried by the user 10 located on the road 20.
In embodiment 2, the 1 st detection range of the reader/writer 400a is separated from the 1 st detection range of the reader/writer 400b, but the 1 st detection range of the reader/writer 400a and the 1 st detection range of the reader/writer 400b may overlap. Fig. 13 and 14 show a plan view of the road 20 in this case. Fig. 13 and 14 are plan views of roads to which the traffic control device according to embodiment 2 of the present invention is applied. Fig. 13 shows the 1 st detection range 26 as one detection range of the reader/writer 400 closest to the user 10. Fig. 14 shows a 1 st pass route 27 and a 2 nd pass route 28 as 2 pass routes of the road 20.
In this case, as well, the 1 st route 27 is a range obtained by excluding the 1 st detection range 26 of all 2 nd readers/writers 400b from a range obtained by combining the 1 st detection ranges 26 of all 1 st readers/writers 400a, and the 2 nd route 28 is a range obtained by excluding the 1 st detection range 26 of all 1 st readers/writers 400a from a range obtained by combining the 1 st detection ranges 26 of all 2 nd readers/writers 400b, as in embodiment 2.
An RF tag according to embodiment 3 of the present invention will be described with reference to the drawings.
Fig. 15 is a block diagram of a traffic management device to which the RF tag according to embodiment 3 of the present invention is applied.
In fig. 15, the traffic management device 3 is a traffic management device as follows: when a user 10 carrying the RF tag 600 passes through the road 20, the RF tag 600 determines whether the user 10 passes through the road 20 in a meandering manner or does not pass through the road 20 in a meandering manner, based on the intensity of the electric wave transmitted from the reader/writer 700 and received by the RF tag 100, and the road 20 is provided with a plurality of readers/writers 700 arranged in the passing direction. The RF tag 600 and the reader/writer 700 included in the passage management device 3 will be described in order.
In addition, in the traffic management device 3, the meandering determination of the 2 traffic routes provided on the road 20 and the user 10 traveling on the road 20 is the same as that in embodiment 1 and embodiment 2, and therefore, the description thereof is omitted. As shown in embodiment 1 and embodiment 2, 2 traffic routes are set for the road 20 based on the reception intensity and the detection threshold value of the query wave transmitted from the reader/writer 700 and received by the RF tag 600, and it is determined whether the user 10 is located in each of the 2 traffic routes.
The RF tag 600 includes a communication unit 610, a reception intensity measurement unit 620, a reception intensity comparison unit 630, a storage unit 640, a route determination unit 650, a number of movements counting unit 660, a meandering determination unit 670, and a notification unit 680. The communication section 610 modulates data into a communication signal and transmits it through an electric wave, and demodulates the communication signal received through the electric wave into data. The reception intensity measuring unit 620 measures the reception intensity as the intensity of the received electric wave. The reception intensity comparing unit 630 compares the reception intensity measured by the reception intensity measuring unit 620 with the detection threshold value stored in the storage unit 640. The storage unit 640 stores reader/writer setting information, detection information, and a meandering threshold, which relate unique reader/writer identification information to a detection threshold, the detection information relating reader/writer identification information included in an inquiry wave received by the communication unit 610, a reception time, which is a time when the communication unit 610 receives the inquiry wave, and a result of comparison between the reception intensity of the inquiry wave measured by the reception intensity measuring unit 620 and the reception intensity comparing unit 630. The route determination unit 650 determines whether the user 10 is located on each of the 2 transit routes. The movement number counting section 660 counts the number of times the user 10 moves from one route to another route among the 2 transit routes, that is, the number of route movements. The meandering determination unit 670 determines whether the user 10 is meandering or non-meandering in the road 20. When the meandering determination unit 670 determines that the user 10 is meandering through the road 20, the notification unit 680 notifies the user.
The reader/writer 700 has a storage unit 710 and a communication unit 720. The storage unit 710 stores unique reader/writer identification information. The communication section 720 modulates data into a communication signal and transmits it through an electric wave, and demodulates the communication signal received through the electric wave into data.
Next, a flow of determining the meandering of the user 10 traveling on the road 20 by the traffic management device 3 will be described with reference to fig. 16. Fig. 16 is a flowchart showing the operation of the traffic management device to which the RF tag according to embodiment 3 of the present invention is applied. The operation of the RF tag 600 and the reader/writer 700 included in the passage management device 3 will be described in order.
First, the operation of the RF tag 600 will be described in order. When the RF tag 600 carried by the user 10 comes within the communicable range of the reader/writer 700, the communication unit 610 receives an inquiry radio wave which is a radio wave including reader/writer identification information transmitted from the reader/writer 700 (S601 in fig. 16). The reception intensity measuring unit 620 measures the reception intensity of the interrogation radio wave received by the communication unit 610 (S602 in fig. 16). The reception intensity comparing unit 630 compares the reception intensity measured by the reception intensity measuring unit 620 with the detection threshold value stored in the storage unit 640 (S603 in fig. 16). The route determination unit 650 starts determination every time a route determination period described later elapses (S604 of fig. 16). The route determination unit 650 determines whether or not the user 10 is located in each of the 2 traffic routes among the detection information stored in the storage unit 640, the detection information including the reception time corresponding to the route determination period described later (S605 in fig. 16). When the route determination unit 650 determines that the user 10 is on the traffic route, and the traffic route thus determined is different from the traffic route determined last time, the movement count unit 660 counts the number of route movements of the user 10 by adding 1 (S606 in fig. 16). When the number of route movements of the user 10 counted by the number-of-movements counting unit 660 is equal to or greater than the meandering threshold value stored in the storage unit 640, the meandering determination unit 670 determines that the user 10 is meandering through the road 20, and when the number of route movements of the user 10 counted by the number-of-movements counting unit 660 is smaller than the meandering threshold value stored in the storage unit 640, the meandering determination unit 670 determines that the user 10 is not meandering through the road 20 (S607 of fig. 16). When the meandering determination unit 670 determines that the user 10 is meandering through the road 20, the notification unit 680 notifies (S608 in fig. 16). The route movement number is counted and the meandering determination is continued until a meandering determination period described later (S609 of fig. 16) elapses, and the route movement number is initialized every time the meandering determination period described later elapses (S610 of fig. 16).
Next to this, the process is carried out, the operation of the reader/writer 700 is described. The communication unit 720 transmits an inquiry radio wave as a radio wave including the reader/writer identification information stored in the storage unit 710 (S701 in fig. 16).
As described above, in the traffic management device 3, the RF tag 600 determines the meandering of the user 10 who is traveling on the road 20.
Here, a route determination period and a meandering determination period will be described.
The route determination period is a sufficient time required for the route determination unit 650 to determine from all the inquiry radio waves received by the RF tag 600 until all the readers/writers 700 transmit the inquiry radio waves.
The meandering determination period is obtained by multiplying a value obtained by adding 1 to the meandering threshold value by at least the time obtained by adding the route determination period and a sufficient time required from the determination by the route determination unit 650 to the determination by the meandering determination unit 670. Further, the meandering determination period may be ended when the RF tag 600 no longer receives the interrogation radio waves from all the readers/writers 700 during the route determination period, and the meandering determination period may be started when the RF tag 600 receives the interrogation radio waves from any of the readers/writers 700.
According to the RF tag of embodiment 3 of the present invention, it is possible to determine whether the user 10 is traveling in a meandering manner or not in the road 20 by measuring the reception intensity of the query radio waves received by the plurality of readers/writers 700 arranged in the traveling direction of the road 20.
Further, the RF tag 600 notifies the user 10 to pass by winding around the road 20, and thus, the user 10 and the person around the user 10 can be notified.
Further, the RF tag 600 receives the inquiry radio wave transmitted from the reader/writer 700 and detects and notifies the user 10 of meandering, and thus can be easily applied to an existing traffic management system.
Further, since the RF tag 600 stores the reader/writer identification information in association with the detection threshold value and can set the detection threshold value for each reader/writer 700 individually, a traffic route corresponding to the width of the road 20 can be set in the road 20 having a non-fixed width as in embodiment 1 and embodiment 2.
Since the RF tag 600 can set the detection threshold value for each reader/writer 700 individually, the detection range of the reader/writer 700 can be easily set as in embodiment 1 and embodiment 2.
Since the RF tag 600 stores the meandering determination value, the meandering determination value can be set individually for the plurality of RF tags 600, for example, when the RF tag 600 is carried by the manager 11, the security personnel of the facility, or the cleaning personnel of the facility, the meandering threshold can be increased for the manager 11, the security personnel of the facility, or the cleaning personnel of the facility without notifying meandering associated with normal operations.
Description of the reference numerals
1: a traffic management device; 2: a traffic management device; 3: a traffic management device; 10: a user; 11: a manager; 20: a road; 21: 1 st detection range; 22: 2 nd detection range; 23: 3 rd detection range; 24: route 1; 25: route 2; 26: 1 st detection range; 27: route 1; 28: route 2; 100: an RF tag; 110: a storage unit; 120: a communication unit; 130: a reception intensity measurement unit; 200: a reader-writer; 210: a storage unit; 220: a 1 st communication unit; 230: a reception intensity comparison unit; 240: a 2 nd communication unit; 300: an upper device; 310: a communication unit; 320: a storage unit; 330: a route determination unit; 340: a movement count unit: 350: a meandering determination unit; 360: a notification unit; 400: a reader-writer; 400a: a 1 st reader/writer; 400b: a 2 nd reader/writer; 410: a storage unit; 420: a 1 st communication unit; 430: a reception intensity comparison unit; 440: a 2 nd communication unit; 500: an upper device; 510: a communication unit; 520: a storage unit; 530: a route determination unit; 540: a movement count unit: 550: a meandering determination unit; 560: a notification unit; 600: an RF tag; 610: a communication unit; 620: a reception intensity measurement unit; 630: a reception intensity comparison unit; 640: a storage unit; 650: a route determination unit; 660: a movement number counting unit; 670: a meandering determination unit; 680: a notification unit; 700: a reader-writer; 710: a storage unit; 720: and a communication unit.
Claims (7)
1. A traffic monitoring system, the traffic monitoring system comprising:
an RF tag, which is carried by a user, having inherent tag identification information;
more than 2N readers arranged in the passing direction of the road and provided with intrinsic reader-writer identification information, wherein the road is provided with a passing route of a 1 st route and a 2 nd route;
a reception intensity measuring unit that measures a reception intensity of an interrogation radio wave received by the RF tag from the reader/writer;
a route determination unit that determines whether or not the user is located on the 1 st route and whether or not the user is located on the 2 nd route, based on the tag identification information of the RF tag that received the inquiry wave, the reader-writer identification information of the reader that transmitted the inquiry wave, and the reception intensity of the inquiry wave, for each of the inquiry waves received by the RF tag during a predetermined route determination period; and
a meandering determination unit that determines that the user is meandering through the road when a number of route movements of the user from one of the 1 st route and the 2 nd route to the other route is equal to or greater than a meandering threshold value within a predetermined meandering determination period, and determines that the user is not meandering through the road when the number of route movements is smaller than the meandering threshold value.
2. The traffic monitoring system of claim 1, wherein,
the reader/writer has a 1 st detection threshold and a 2 nd detection threshold as 2 detection thresholds, the 2 nd detection threshold being a value equal to or lower than the 1 st detection threshold, the reader/writer is provided with a 1 st detection range in which the reception intensity of the transmitted interrogation wave is equal to or higher than the 1 st detection threshold, a 2 nd detection range smaller than the 1 st detection threshold and equal to or higher than the 2 nd detection threshold, and a 3 rd detection range smaller than the 2 nd detection threshold,
the 1 st path is a range obtained by combining the 1 st detection ranges of all the readers/writers,
the 2 nd route is a range obtained by removing all of the 1 st detection range and the 2 nd detection range of the reader/writer from a range obtained by combining all of the 3 rd detection ranges of the reader/writer,
the route determination unit determines that the user is located on the 1 st route when the reception intensity of one or more of the inquiry radio waves transmitted by the reader/writer is equal to or higher than the 1 st detection threshold, and determines that the user is located on the 2 nd route when the reception intensity of all of the inquiry radio waves transmitted by the reader/writer is lower than the 2 nd detection threshold.
3. The traffic monitoring system of claim 1, wherein,
the reader/writer has a 1 st detection threshold as one detection threshold, the reader/writer is provided with a 1 st detection range in which the reception intensity of the transmitted interrogation wave is equal to or higher than the 1 st detection threshold,
the N readers are composed of M1 st readers and (N-M) 2 nd readers which are smaller than N,
the 1 st route is a range obtained by removing all 1 st detection ranges of the 2 nd reader/writer from a range obtained by combining all 1 st detection ranges of the 1 st reader/writer,
the 2 nd route is a range obtained by removing all 1 st detection ranges of the 1 st reader/writer from a range obtained by combining all 1 st detection ranges of the 2 nd reader/writer,
the route determination unit determines that the user is located in the 1 st route when the reception intensity of one or more of the inquiry electric waves transmitted by the 1 st reader/writer is equal to or higher than the 1 st detection threshold and the reception intensity of all of the inquiry electric waves transmitted by the 2 nd reader/writer is lower than the 1 st detection threshold, and determines that the user is located in the 2 nd route when the reception intensity of all of the inquiry electric waves transmitted by the 1 st reader/writer is lower than the 1 st detection threshold and the reception intensity of one or more of the inquiry electric waves transmitted by the 2 nd reader/writer is equal to or higher than the 1 st detection threshold.
4. A traffic monitoring system according to claim 2 or 3, characterized in that,
the detection threshold is set separately in association with the reader/writer identification information,
the route determination unit compares the reception intensity of the inquiry radio wave with the detection threshold associated with the reader-writer identification information of the reader-writer that transmitted the inquiry radio wave.
5. The traffic monitoring system according to any one of claims 1 to 4, characterized in that,
the meandering threshold is set separately in association with the RF tag identification information,
the meandering determination unit compares the number of route movements with the meandering threshold associated with the tag identification information of the RF tag to determine.
6. The traffic monitoring system according to any one of claims 1 to 5, characterized in that,
the traffic monitoring system includes a notification unit that notifies the user when the meandering determination unit determines that the user is meandering through the road.
7. An RF tag carried by a user and having inherent tag identification information, comprising:
A reception intensity measuring unit that measures reception intensities of interrogation radio waves received from 2 or more N readers arranged in a traffic direction of a road provided with a 1 st route and a 2 nd route, the N readers having unique reader identification information;
a route determination unit that determines whether or not the user is located on the 1 st route and whether or not the user is located on the 2 nd route, based on the reader/writer identification information of the reader/writer that transmitted the query wave and the reception intensity of the query wave, for each of the query waves received by the RF tag during a predetermined route determination period;
a meandering determination unit that determines that the user is meandering through the road when a number of route movements of the user from one of the 1 st route and the 2 nd route to the other route is equal to or greater than a meandering threshold value within a predetermined meandering determination period, and determines that the user is not meandering through the road when the number of route movements is less than the meandering threshold value; and
And a notification unit configured to notify the user when the meandering determination unit determines that the user is meandering through the road.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/013208 WO2019186883A1 (en) | 2018-03-29 | 2018-03-29 | Transit monitoring system and rf tag |
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| CN111886512A CN111886512A (en) | 2020-11-03 |
| CN111886512B true CN111886512B (en) | 2023-07-07 |
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| CN201880091421.6A Active CN111886512B (en) | 2018-03-29 | 2018-03-29 | Traffic monitoring system and RF tag |
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| JP (1) | JP6849147B2 (en) |
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| WO (1) | WO2019186883A1 (en) |
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| JP6849147B2 (en) | 2021-03-24 |
| JPWO2019186883A1 (en) | 2020-12-03 |
| WO2019186883A1 (en) | 2019-10-03 |
| CN111886512A (en) | 2020-11-03 |
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