JP6224326B2 - RF tag detection apparatus and method, and system for detecting subject's risk, self-supporting life, sociality using this detection method - Google Patents

Description

  The present invention relates to an RF (Radio Frequency) tag detection device, a detection system, and a detection method, and in particular, is attached to a living body such as a person or animal to be detected or an object such as a product, and the position of the detection target person or the like. The present invention relates to a detection device, a detection system, and a detection method. The present invention also relates to a system that evaluates the degree of risk, sociality, and independence of the person being monitored from the position information and time information of the person being monitored.

  There is a technique for detecting the position of a detection target person using an RF tag and a loop coil antenna. For example, in Patent Document 1, an RF tag having position information is installed on the infrastructure side, and a reader / writer is attached on the detection target side, so that the RF tag ID read by the reader / writer and the read time are calculated. A technique for tracking the behavior of the person to be detected is described.

  Further, in Patent Document 2, a plurality of readers / writers having position information are installed on the infrastructure side, RF tags are attached to detection targets, and the reader / writer position information and the RF tag ID read by the reader / writer are read. A technique is described for collecting information over a network and tracking the behavior of a detection target person.

  Furthermore, Patent Document 3 describes a method for avoiding interference between antennas in detection of an RF tag. In this method, interference between antennas is avoided by means of receiving only an arbitrary antenna with exclusive control.

  Furthermore, Patent Document 4 describes a method of tracking an arbitrary moving body by detecting an RF tag. Patent Document 5 describes a method of tracking a moving body such as a demented elderly person using an infrared camera.

JP 2001-183455 A JP 2004-271372 A JP 2006-222588 A JP 2005-83781 A Japanese Patent Laid-Open No. 11-154293

(First problem)
In the technique described in Patent Document 1, an RF tag having position information is installed on the infrastructure side, and a reader / writer for detecting position information is attached to the detection target person side, so that the detection target person is a disabled person or an elderly person In addition, there are problems in the load and maintenance on the person to be detected. Further, there is a problem in terms of equipment cost in attaching a reader / writer for each person to be detected. The moving body detection system using the infrared sensor described in Patent Document 5 also has a similar problem because it is necessary to attach an infrared light emitting device and a battery for transmission and reception to the elderly and the disabled.

(Second problem)
In the techniques described in Patent Document 2 and Patent Document 4, since a plurality of reader / writers having position information are installed on the infrastructure side, the number of readers / writers connected to the network is large. There are challenges.

(Third problem)
In the antenna interference avoidance method described in Patent Literature 3, a loop coil antenna that performs communication by an electromagnetic induction method is switched and used in a time division manner. However, the loop coil antenna not in use always maintains the coil characteristics. For this reason, even if the transmission operation is switched in a time-sharing manner, the magnetic field emitted from the loop coil antenna in the transmission state affects the loop coil antenna in the transmission state and induces a magnetic field, and the RF tag is generated by the magnetic field. May be detected. This occurs because the radio wave transmitted from the RF tag is transmitted to the loop coil antenna in the transmitting state via the magnetic field of the loop coil antenna that is not in the transmitting state. As described above, there is a problem that the loop coil antenna in the time zone in the transmission state erroneously recognizes and records the RF tag outside the detection area as if it is in the detection area.

  For example, as shown in FIG. 16, in a detection system in which four loop coil antennas # 1 to # 16 are arranged in four rows of four, only the antenna 20 of # 7 is connected to the reader / writer 40 and is transmitted. Suppose you are in a state. Under the influence of the magnetic field 14 generated by the transmitting antenna # 7, a magnetic field is also generated in the surrounding loop coil antennas # 2, # 3, # 4, # 6, # 8, # 10, # 11, and # 12. To do. Now, if the detection target person 60 is located in the vicinity of the antenna # 10, the RF tag attached to the detection target person responds to the magnetic field of the antenna # 10 and transmits a signal. The signal transmitted from the RF tag is transmitted to the antenna # 7 via the antenna # 10 or directly, and the presence of the RF tag is detected by the antenna # 7. In this way, the RF tag of the person to be detected that was located in the vicinity of the antenna # 10 is erroneously recognized as being detected at the position of the antenna # 7.

(Fourth problem)
In the detection system of a moving object using an infrared sensor described in Patent Document 5, a large number of infrared cameras are installed in an infrastructure, and an inquiry is made by a polling method with a slave unit attached to an arbitrary moving object. Although it is effective in monitoring the habit of a demented elderly person who is a subject, since the stagnation time and stagnation location are not monitored, it is insufficient as a method for detecting the risk of the subject in protecting the subject.

(Fifth problem)
In the detection method of the moving body described in Patent Literatures 1 to 5, it is impossible to determine how much communication between subjects or between the subject and a caregiver is achieved, that is, sociability.

[Object of invention]
Accordingly, an object of the present invention is to provide an RF tag detection apparatus, system, and method with high detection accuracy by solving the above-described problems and preventing erroneous recognition of the RF tag. Another object is to provide an apparatus and method for determining the risk level, independent living degree, and sociality of a subject wearing an RF tag using these apparatuses, systems, or methods.

  In order to achieve the above object, the detection apparatus of the present invention switches between a plurality of loop coil antennas that communicate with an RF tag by an electromagnetic induction method and one loop coil antenna among the plurality of RF tags. An antenna switching unit; and a detection unit configured to detect an RF tag based on information received from the RF tag by the loop coil antenna selected by switching by the antenna switching unit, and each of the plurality of loop coil antennas includes a coil. A disconnect switch is provided, and the RF tag detection is performed with the coil disconnect switch of the loop coil antenna selected by switching by the antenna switching means closed and the coil disconnect switch of the other unused loop coil antenna opened. Do.

  The detection system of the present invention includes a plurality of the above-described RF tag detection devices, and each detection block is arranged in a plane to form a detection block group, and antenna switching performed in each detection block is performed by the detection block. The detection blocks included in the group are synchronized.

  The detection method of the present invention is an RF tag detection method by an RF tag detection device comprising a plurality of loop coil antennas, each of which is provided with a coil disconnection switch, wherein the plurality of loop coil antennas are provided. An antenna switching step of switching and selecting one of the coil antennas among the coil antennas, and a coil cutting switch of the loop coil antenna switched and selected by the antenna switching step is closed, and other unused loop coil antennas And an opening / closing step of opening the coil cutting switch, and a detection step of detecting the RF tag based on information received from the RF tag by the loop coil antenna selected by switching by electromagnetic induction.

  Further, the detection program of the present invention is an RF tag detection program by an RF tag detection device comprising a plurality of loop coil antennas, and each of the plurality of loop coil antennas provided with a coil disconnection switch. An antenna switching function for switching and selecting one loop coil antenna among a plurality of loop coil antennas, and a coil cutting switch of the loop coil antenna selected by switching by the antenna switching function is closed, and the other unused An open / close function for opening the coil cutting switch of the loop coil antenna and a detection function for detecting the RF tag based on information received from the RF tag by the electromagnetic induction method by the loop coil antenna selected by switching are realized.

  Moreover, the monitoring system of the present invention includes the above-described RF detection device or RF detection system, and uses the RF tag detection device to specify the location and time at which the subject wearing the RF tag is located, and to specify the specified location and time. The degree of independence or the degree of risk of the subject is detected from the above information based on a predetermined criterion.

  In addition, the monitoring method of the present invention uses the RF tag detection method described above to identify the location and time of the subject wearing the RF tag, and based on the information on the identified location and time based on a predetermined criterion. Detect the subject's independence or risk.

  The monitoring program of the present invention causes the computer to execute the above-described RF tag detection program, specifies the location and time at which the subject wearing the RF tag is located, and makes a predetermined determination from the information on the specified location and time. The function of detecting the degree of independence or risk of the subject based on the criteria is realized.

  Moreover, the monitoring system of the present invention includes the RF tag detection device or the RF tag detection system described above, and the RF tag detection device is used to connect the subject subject and the other subjects among the subjects wearing the RF tag. The distance and time information is acquired, and the sociability of the subject subject is determined based on the predetermined determination criteria from the acquired distance and time information.

  In addition, the monitoring method of the present invention uses the above-described RF tag detection method to acquire distance and time information between the subject subject and the other subjects among the subjects wearing the RF tag, and the obtained distance The sociability of the subject subject is determined based on the predetermined determination criteria from the time information.

  In addition, the monitoring program of the present invention causes the computer to execute the above-described RF tag detection program, and obtains information on the distance and time between the subject subject and the other subjects among the subjects wearing the RF tag. The function of determining the sociability of the subject subject based on a predetermined criterion from the acquired distance and time information is realized.

  The configuration of the detection device, detection system, detection method, and detection program of the present invention can prevent erroneous recognition of the RF tag and achieve high detection accuracy. The configuration of the monitoring system, monitoring method, and monitoring program enables the RF tag It is possible to determine the degree of risk, the degree of independence, or the sociality of the subject wearing the.

It is a block diagram of the RF tag detection apparatus of this invention. An arrangement example (for one detection block) of the loop coil antenna is shown. The example of arrangement | positioning (for 1 detection cell) of a loop coil antenna is shown. An example of attaching an RF tag is shown. The detection form of RF tag by a loop coil antenna is shown. The detection form of RF tag by the loop coil antenna of a detection block structure is shown. An arrangement example (for 9 detection blocks) of the loop coil antenna is shown. The synchronization switching between blocks is typically shown. The synchronization switching between blocks is typically shown. The monitoring system using the RF tag detection apparatus of this invention is shown. It is a table of risk setting parameters. It is a table | surface of a social property setting parameter. It is a table | surface of an independent life degree setting parameter. An example of an event-driven time log is shown. An example of a daily time log is shown. It is explanatory drawing of the interference between antennas which arises by an electromagnetic induction system. The correlation with a subject subject and other subjects is shown. The relationship between the distance between the subject subject and other subjects and time is shown. The weighting of the distance between the subject subject and other subjects is shown. Indicates time weighting. The correlation with a subject subject and other subjects is shown. The weighting of area (time x distance) is shown. The experience value between subjects is shown. An example of calculation of sociality is shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1. First Embodiment [Description of Configuration]
FIG. 1 is a block diagram showing a configuration of an RF tag detection apparatus 100 of the present invention. The RF tag detection apparatus 100 of the present invention includes 16 loop coil antennas 20 (# 1 to # 16), an antenna changeover switch 30, and a controller 40. The number of loop coil antennas 20 is not limited to 16, and can be set arbitrarily. The loop coil antenna 20 is connected to the controller 40 via the antenna changeover switch 30.

  Each of the loop coil antennas 20 is a coiled antenna, and detects its presence by communicating with an RF tag by an electromagnetic induction method. The electromagnetic induction method is a method of sending a signal using an induced magnetic field generated between the transmission side and the reception side. Unlike the radio wave system, the electromagnetic induction system is characterized in that accurate position information can be obtained even in a very narrow range. Each loop coil antenna 20 may be a transmission / reception antenna, or may be provided with separate antennas for transmission and reception. Each loop coil antenna 20 is provided with a coil cutting switch 50 for cutting / connecting the coil portion of the antenna. The coil cutting switch 50 may be configured by a relay, for example.

  The antenna changeover switch 30 connects one loop coil antenna 20 used for detection among the 16 loop coil antennas 20 to the controller 40. The antenna switching may be controlled by the controller 40.

  The controller 40 (also referred to as “reader / writer”) includes an antenna switching control unit 110, a coil cutting control unit 120, a transmitter / receiver 130, a controller control unit 140, an RF tag detection unit 150, and a storage unit 160. And a communication unit 170. The antenna switching control unit 110 instructs the antenna switching switch 30 to switch the loop coil antenna 20 connected to the controller 40 to the designated loop coil antenna 20.

  The coil cutting control unit 120 individually controls opening and closing of the coil cutting switch 50 provided in the coil unit of the loop coil antenna 20. When the coil cutting switch 50 is in the “open” state, the connection of the coil portion of the loop coil antenna 20 is cut, and the electromagnetic induction characteristics of the coil portion are lost. Therefore, even if the magnetic field passing through the coil portion changes, no induced magnetic field is generated.

  The transmitter / receiver 130 is connected to the loop coil antenna 20 selected by being switched by the antenna selector switch 30. When the loop coil antenna 20 is used for both transmission and reception, for example, a transmitter and a receiver are connected to the loop coil antenna 20 by time division to perform transmission and reception. When the loop coil antenna 20 includes a transmitting antenna and a receiving antenna, the transmitter is connected to the transmitting antenna and the receiver is connected to the receiving antenna.

  The RF tag detector 150 reads RF tag identification information from the signal received by the transmitter / receiver 130. The controller control unit 140 controls operations of the antenna switching control unit 110, the coil cutting control unit 120, and the transmitter / receiver 130. The storage unit 160 stores a control program executed in the controller control unit 140, setting parameters, detection results, and the like. The communication unit 170 performs data communication with other devices.

  As shown in FIG. 2, the detection block 300 is formed by arranging 16 loop coil antennas 20 (# 1 to # 16) side by side in a plane. In FIG. 2, they are arranged in 4 rows × 4 columns (however, the coil cutting switch 50 is not shown). One loop coil antenna 20 forms one detection cell 200 (FIG. 3). In FIG. 2, 16 detection cells 200 form one detection block 300. One detection cell has a size of, for example, 25 cm × 25 cm, and one detection block has a size of, for example, 1 m × 1 m.

  FIG. 3 schematically shows a detection cell, FIG. 3 (a) shows a detection cell when the loop coil antenna 20 is used for both transmission and reception, and FIG. 3 (b) shows that the loop coil antenna 20 is used for transmission and reception. The detection cell when each antenna is provided is shown.

  4 and 5 are diagrams in which the RF tag 10 is attached to the person 60 to be detected. FIG. 4 is a perspective view of mounting the RF tag as seen from above. FIG. 5 is a side view of mounting the RF tag 10 as viewed from the side. The detection target person 62 on the right side of FIG. 5 has the RF tag 10 having recognition ID data attached to the bare feet. In the detection target person 64 on the left side of FIG. 5, the RF tag 10 having the recognition ID data is attached to the back of the slipper 12. The RF tag 10 may be a passive type or an active type.

  FIG. 5 also shows the structure of the floor mat 400 on which the loop coil antenna 20 is installed. The loop coil antenna 20 is wrapped in the magnetic sheet 24 and accommodated in the floor mat 400. The surface of the floor mat is composed of floor mat surface fibers 22, and the back surface is composed of floor mat back surface fibers 26.

  In the case of the detection target person 62 on the right side of FIG. 5, the loop coil antenna 20 is in a transmission operation state in which the coil cutting switch 50 is ON (closed) by time division control. Therefore, the RF tag 10 communicates with the magnetic field 14 emitted from the loop coil antenna 20. On the other hand, in the case of the detection target person 64 on the left side of FIG. Therefore, since the coil portion of the antenna is cut by the coil cutting switch 50, the loop coil antenna 20 does not have coil characteristics, and thus is not affected by the magnetic field 14 emitted from the loop coil antenna 20 in the transmission operation state.

  FIG. 6 shows a detection form of the RF tag 10 in the case where the detection block 300 is configured by arranging 16 loop coil antennas 20 (# 1 to # 16) in a plane. In the detection target person 60 and the detection target person 70, the RF tag 10 is attached to the soles of the feet as in FIG.

  In the present embodiment, a floor mat 400 having the cross-sectional structure of FIG. Sixteen loop coil antennas 20 (hereinafter sometimes simply referred to as “antennas # 1 to # 16”) are exclusively transmitted in a time-sharing manner.

  In FIG. 6, antenna # 7 performs a transmission operation, and the other antennas do not perform a transmission operation. At this time, the coil disconnection switch 50 of the antenna # 7 is in the “closed” state, and the coil disconnection switches 50 of the other antennas are in the “open” state. Antenna # 7 performing the transmission operation emits the magnetic field 14 by electromagnetic induction and communicates with the RF tag 10 attached to the sole of the detection subject 60 in the near field in a non-contact manner.

  The antennas other than the antenna # 7 in the same time zone are not affected by the magnetic field 14 generated by the antenna # 7 because a part of the coil is cut by the coil cutting switch 50 and has no coil function.

  By the same operation as described above, the RF tag installed in the detection target person 70 performs contactless communication only when the antenna # 4 is in a transmission operation state.

[Description of operation]
Next, the operation of the RF tag detection apparatus having the configuration shown in FIG. 1 will be described.

(1) Antenna switching The antenna switching control unit 110 of the controller (also referred to as a “reader / writer”) 40 controls the antenna switching switch 30 to sequentially set the loop coil antenna 20 in a transmission operation state in order in a time division manner. . For example, when the loop coil antenna # 7 (see FIG. 6) is selected in the transmission operation state by the control of the antenna changeover switch 30, the coil disconnection switch 50 of the antenna # 7 is in the ON state (“closed” state, that is, the relay contact Short), and the magnetic field 14 is emitted. When the antenna # 7 is in a transmission operation state, the RF tag 10 installed on the detection target person 60 located on the antenna # 7 communicates with the antenna # 7. Similarly, when the detection target person 70 is located on the antenna # 4 when the antenna # 4 enters the transmission state, the RF tag 10 attached to the detection target person 70 and the antenna # 4 communicate with each other.

  The order of antenna switching can be set arbitrarily. For example, switching from antenna # 1 to # 2, # 3,..., # 16 may be performed in order, and when antenna # 16 is reached, the order may start again from # 1.

(2) Data Capture The loop coil antenna that has communicated with the RF tag in the transmission state transmits the read RF tag ID and its own antenna ID to the reader / writer 40 as necessary.

  The reader / writer 40 that has captured the data stores the ID of the RF tag and the antenna ID in the storage unit 160 using the reception time as a time stamp. In some cases, the captured RF tag ID, antenna ID, time stamp, and the like are transmitted to another device via the communication unit 170.

2. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the second embodiment, as shown in FIG. 7, a floor mat 400 is configured by arranging nine detection blocks (see FIG. 2) of the first embodiment side by side in a plane. In FIG. 7, the detection blocks 300 (# 1,..., # 9) are arranged in 3 rows and 3 columns. The number of detection blocks is not limited to nine and can be set arbitrarily. Each detection block 300 is composed of 16 detection cells 200 (# 1,..., # 16). In FIG. 7, the coil disconnection switch 50 in each detection cell 200 is not shown. One reader / writer 40 (not shown) is provided for one detection block 300.

  The reader / writer 40 used in the second embodiment may be the same as the reader / writer 40 of the first embodiment shown in FIG.

  8 and 9 schematically show switching of synchronization between detection blocks. In each detection block 300, the loop coil antenna 20 connected to each reader / writer 40 is sequentially switched, and the switching is synchronized in all the detection blocks (# 1,..., # 9). That is, the antenna switching operation is performed at the same time in all the detection blocks (# 1,..., # 9).

  For example, in FIG. 8A, antenna # 4 is selected in all detection blocks # 1 to # 9 (time 00 msec), and in FIG. 8B after 10 milliseconds, all detection blocks # 1 are selected. In ~ # 9, antenna # 3 is selected (time 10 msec), and in FIG. 8C after 10 milliseconds, antenna # 2 is selected in all detection blocks # 1 to # 9 (time 20 msec). In FIG. 8D after 10 milliseconds, antenna # 1 is selected in all detection blocks # 1 to # 9 (time 30 msec), and in FIG. In the detection blocks # 1 to # 9, the antenna # 5 is selected (time 40 msec), and the same operation is repeated until FIG. 8 (p). Note that synchronization switching may be performed not in all detection blocks but in a set of predetermined detection blocks.

  In synchronous switching between detection blocks, the relative position of the antenna selected in each detection block (# 1,..., # 9) is the same in all detection blocks (# 1,..., # 9). It may be. For example, in FIG. 8A, in all the detection blocks (# 1,..., # 9), the # 4 loop coil antenna located at the upper right of the detection block is selected, and FIG. In b), in all the detection blocks # 1 to # 9, the antenna # 3 located on the left of # 4 of the detection block is selected. Since the relative positions of the selected antennas in the detection block are the same, the interval between the selected antennas is kept constant. Therefore, uniform detection accuracy can be realized over the entire floor mat 400.

  8 and 9, a circle 410 indicates a distance at which interference between antennas does not occur with respect to the loop coil antenna at the center thereof, and a circle 420 indicates a point where the ID of the RF tag is recognized, and the loop coil antenna 20 Indicates an antenna connected to the transmitter / receiver 130 of the controller 40.

3. Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. 10 to 15 and FIGS. 17 to 24.

  FIG. 10 shows a monitoring system 500 using the RF tag detection device of the first embodiment and the RF detection system of the second embodiment. The monitoring system 500 of the third embodiment is the same as the first embodiment or the second embodiment in that it includes an RF tag detection device or system, but differs in that it includes an evaluation system 600. Yes.

  The evaluation system 600 includes a time log storage unit 510, a location data management unit 520, a parameter setting unit 530, and a data processing unit 540.

  Next, the operation of the monitoring system in FIG. 10 will be described. Since antenna switching is the same as that in the first embodiment, description thereof is omitted.

(1) Data Acquisition The loop coil antenna that has communicated with the RF tag in the transmission state transmits the read RF tag ID and its own antenna ID to the reader / writer 40 as necessary. The reader / writer 40 that has captured the data transfers a time log with the reception time as a time stamp to the time log storage unit 510 of the evaluation system 600 via the network.

(2) Creation of Location Data The service provider (provider) 560 creates location data using the terminal 550 before service operation and sends it to the location data management unit 520. The location data manages the association between the space coordinates where the monitoring target person 60 and the monitoring target person 70 live and the antenna number. For example, the antenna # 7 is set for the cafeteria and the antenna # 9 is set for the toilet. is there.

(3) Parameter setting Parameters (also referred to as “determination criteria”) for evaluating “sociality”, “risk level”, and “independence level of living” of the monitoring target provided by the monitoring system 500 of the present invention, Setting is performed by the parameter setting unit 530. This setting is performed via the network by the service provider 560 or the client 570 as a customer. Hereinafter, each parameter will be described.

(4) Risk setting parameter FIG. 11 shows an example of the risk parameter. Location information is set in “risk factor”, stop time for each location in “threshold”, and risk level for each location in “risk”. For example, in the example of FIG. 11, the risk is “A” if it has been in the bus for more than 1 hour, and the risk is “B” if it has been in the toilet for more than 20 minutes. If it is over, the risk is “C”. The setting is performed by the provider 560 or the client 570.

(5) Sociality setting parameter FIG. 12 shows an example of the sociality setting parameter. In this parameter setting, parameters of the positional relationship and contact time between the first monitored person to be monitored and the second monitored person not to be monitored are set. For example, in the example of FIG. 12, when approaching within 10 m with another person, 10 points are given per person, and when the distance with another person approaches within 5 m, 5 points are given per 10 minutes. The setting is performed by the provider 560 or the client 570.

FIG. 17 illustrates a first monitored person (also referred to as a target subject) to be monitored and a second monitored person (also referred to as another test subject) that is not monitored. Here, Subject 1, Subject 2, Subject 3, An example of measuring the distance to the subject 4 is shown. Measurements are made at intervals of 5 seconds from 8:30:30 (t ₀ ) to 8:32:30 (t _n ). FIG. 17 also shows a score obtained by weighting the distance between the subject subject and each other subject, a score obtained by weighting the elapsed time, and an area score obtained from these scores. FIG. 18 shows a graph of the relationship between the distance between the subject subject and each other subject and the time (time) at the time of measurement.

  FIG. 19 shows an example of weighting regarding distance as a setting parameter for sociality. For example, if the distance is within 2 m, the distance score is 10 points. The weighting is set smaller as the distance increases.

  FIG. 20 shows an example of time weighting as a social setting parameter. For example, when the same distance is maintained for 5 seconds, or when there is no change in the weighting of the distance, one point is imposed as a time score. That is, even if the distance is within 2 m, if the same distance is not maintained for at least 5 seconds, the time score is 0 points.

  FIG. 21 is a graph showing the relationship between each score and time obtained by weighting the distance between the target subject shown in FIG. 17 and each of the other subjects 1 to 4 for each subject. A value obtained by integrating a score obtained by weighting time and a score obtained by weighting distance indicates sociability. For example, the sociability of the subject subject with respect to subject 1 is represented by S1 (the area of the rectangular portion). The sociality of the subject subject with respect to subject 2 is represented by S2. The social property of the subject subject with respect to the subject 3 is represented by the sum of S2 (same time × same distance) and S3 shared with the subject 2. The area S is obtained by the product of the time score and the distance score, but the area S may be weighted as shown in FIG. Further, as shown in FIG. 23, “experience value” between subjects may be set based on the total value of the area S. The experience value is a weighting coefficient for the area.

  As described above, various conditions such as distance weighting, time weighting, and area (time × distance) weighting can be used as determination criteria.

  FIG. 24 shows a calculation example of a score, which is an index indicating the sociability of the subject subject considering the experience value shown in FIG. 23 as a parameter.

(6) Independence level of life setting parameter An example of the independence level of life setting parameter is shown in FIG. Set the items that are the factors for improving the degree of independence and weighting for each item. For example, in the example of FIG. 13, a meal is given 10 points per time, a toilet (excretion) is given 3 points per time, a bath (bathing) is given 5 points per time, and sleep is 1 3 points are given per hour, movement is given 1 point per 5 m, and care is subtracted -5 points per time. The setting is performed by the provider 560 or the client 570.

(7) Provision of Service As described above, the reader / writer 40 transfers data to the time log storage unit 510 of the evaluation system 600 via the network. On the other hand, as described above, the location data created by the provider 560 using the terminal 550 is sent to the location data management unit via the network for management. Further, as described above, the parameter group created by the provider 560 or the client 570 is sent to the parameter setting unit 530 via the network for management operation.

  The data processing unit 540 of the evaluation system 600 causes the location information and time information of the monitored person stored in the time log storage unit 510 and the location stored in the location data management unit 520 by executing application software, for example. Based on the data and various parameters set by the parameter setting unit 530, the degree of risk, the sociality, and the independent living degree of the monitored person are evaluated. Here, for example, for the position information of the monitored person, a combination of the unique ID of the RF tag attached to the monitored person and the unique ID of the loop coil antenna used for detection is used. The time information is obtained from the communication log history using the time when the loop coil antenna detected the RF tag and transmitted to the reader / writer. The evaluation result of the evaluation system 600 may be sent to the terminal 580 of the client 570 via the network, recorded in the memory, and displayed on the display unit.

  Examples of evaluation results of the evaluation system 600 are shown in FIGS. FIG. 14 shows an example of a time log that is output in real time in an event-driven manner. FIG. 15 shows an example of a time log output daily. The location of “dining room”, “sitting room” in the time log example of FIG. 14 and the location of “meal”, “bus”, “toilet” in the time log example of FIG. 15 are the antenna IDs given by the reader / writer 40. And the correspondence between the antenna ID described in the location data and the position information.

  In the time log example of FIG. 14, “location” is defined by the location information set in FIG. 6, and when the stop time at the same “location” exceeds the “threshold value” set in FIG. The unit 540 (or application software) issues a warning to the terminal 580 included in the client 570 via the network.

  According to the present invention, when evaluating the sociability of a monitoring target person, it is possible to more accurately record the distance and contact time with other monitoring target persons, and the place of contact.

  In addition, according to the present invention, the degree of danger in the daily life of the monitoring target person is detected from the time at which the danger is expected to be detected, and is notified to the customer (client) monitor or guardian. Can do.

  Further, in the present invention, an ID for identifying a monitoring subject is written in a small non-contact passive type RF tag that does not require a power source, and a slipper or You may attach to the back of footwear, such as shoes. An RF tag attached to the sole of a subject's foot can communicate with power supplied from a plurality of loop coil antennas. Thereby, the stress which a monitoring subject feels is reduced and maintenance becomes free. Therefore, the capital investment effect of the provider that provides the service can be improved.

  In the related art described in Patent Document 2, the reader / writer that communicates with the RF tag attached to the person to be monitored is one-to-one, but in the present invention, one block is formed by a plurality of loop coil antennas. And one reader / writer may be prepared for each block. This improves the return on investment in equipment costs.

  As for the method of avoiding interference between antennas, a loop coil antenna in a time zone that is not in a transmission state takes measures to cut a part of the coil to eliminate coil characteristics. This countermeasure eliminates the induction to the other antennas by the magnetic field emitted from the transmitting antenna, so that only the transmitting antenna detects the RF tag, and the accuracy of the detection position is improved. False detection can be avoided.

Moreover, the detection accuracy of the distance between monitoring subjects improves by connecting / disconnecting an antenna coil exclusively like this invention. For example, a distance within 50 cm can be detected. As a result, weighting can be set by distance when evaluating sociality.

  In addition, since one reader / writer is provided for each block, it is not necessary to perform scheduling between reader / writers in order to switch the transmission operation of the antenna in a time division manner. That is, since the communication path between the reader / writers for that purpose is not required, the equipment cost can be improved.

  The loop antenna has a feature of having position information. When the subject is considered as a moving body, the communication record can be converted into time and place information and information about the distance between the time and the moving body.

  Further, according to the present invention, it is possible to detect a subject's degree of risk and an independent living degree in real time from the relationship between time and place where the subject who is a moving body acts. Moreover, the social property of the subject subject can be determined in real time from the correlation between the distance between the subject subject and the other subject, or the distance between the subject subject and the caregiver (or guardian) and time.

  The RF tag detection device and the monitoring system described above can be realized by hardware, software, or a combination thereof. Moreover, the starting method of said RF tag detection apparatus is also realizable with hardware, software, or these combination. Here, “realized by software” means realized by a computer reading and executing a program.

  The program may be stored using various types of non-transitory computer readable media and supplied to the computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD- R, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)). The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A plurality of loop coil antennas that communicate with the RF tag by electromagnetic induction;
An antenna switching means for switching and selecting one of the plurality of loop coil antennas;
Detecting means for detecting the RF tag based on information received from the RF tag by the loop coil antenna selected by switching by the antenna switching means;
A coil cutting switch is provided in each of the plurality of loop coil antennas, the coil cutting switch of the loop coil antenna selected by switching by the antenna switching means is closed, and the coil of the other unused loop coil antenna An RF tag detection apparatus for detecting an RF tag in a state where a disconnect switch is opened.

(Appendix 2)
The RF tag detection device according to appendix 1, wherein the antenna switching unit switches the antenna to be used in a time division manner in a predetermined order in the plurality of loop coil antennas.

(Appendix 3)
The RF tag detection device according to appendix 1 or 2, wherein each of the plurality of loop coil antennas is used for both transmission and reception.

(Appendix 4)
The RF tag detection device according to appendix 1 or 2, wherein each of the plurality of loop coil antennas includes a transmission loop coil antenna and a reception loop coil antenna.

(Appendix 5)
The RF tag detection device according to any one of appendices 1 to 4, which includes one or a plurality of the RF tags attached to a detection target person or a detection target.

(Appendix 6)
The RF tag detection device according to any one of appendices 1 to 5, wherein the RF tag is a passive tag and is fed from the plurality of loop coil antennas.

(Appendix 7)
The RF tag detection device according to any one of appendices 1 to 6, wherein the plurality of loop coil antennas are arranged side by side in a plane to form a detection block.

(Appendix 8)
A plurality of RF tag detection devices according to appendix 7, each detection block being arranged in a plane to form a detection block group, and antenna switching performed in each detection block is detected in the detection block group RF tag detection system to synchronize between.

(Appendix 9)
The RF tag detection system according to appendix 8, wherein antenna switching is performed in synchronization between detection blocks included in the detection block group so that the relative positions of the loop coil antennas used in each detection block are the same.

(Appendix 10)
A monitoring system for monitoring a monitoring subject to which an RF tag is attached,
The RF tag detection device according to any one of appendices 1 to 7, or the RF tag detection system according to appendix 8 or 9,
Location information storage means for storing location information where the plurality of loop coil antennas are installed in association with identification information of the plurality of loop coil antennas;
Log identification means for acquiring the corresponding location information stored in the location information storage means from the identification information of the loop coil antenna that detected the RF tag, and recording it in association with the detected time information;
Monitoring system with.

(Appendix 11)
A reference parameter setting means for setting a reference parameter for determining the degree of risk, sociality or independence of the person to be monitored;
Estimating means for estimating the degree of risk, sociality or independent living of the monitoring subject based on the location information and time information recorded in the log recording means with reference to the reference parameters set in the reference parameter setting means When,
The monitoring system according to claim 10, further comprising:

(Appendix 12)
The risk reference parameter includes a threshold value of a time to stop at a predetermined location, and the estimation means responds to the predetermined location when the monitoring subject has stopped at the predetermined location for longer than the threshold value. The monitoring system according to appendix 11, wherein the attached risk index is an estimation result.

(Appendix 13)
The sociability standard parameter includes a threshold value of the distance between the monitoring target and the other monitoring target, and the estimation means determines the number of times the distance between the monitoring person and the other monitoring target is closer than the threshold. The monitoring system according to appendix 11 or 12, wherein it is determined that the number of persons having contact with the person and the sociability index associated with the number of persons is an estimation result.

(Appendix 14)
The sociability reference parameter includes a threshold value of a time during which the social object is stopped within a predetermined distance from another monitoring target, and the estimation means is configured so that the monitoring target is within the predetermined distance from the other monitoring target. 14. The monitoring system according to any one of appendices 11 to 13, wherein when the vehicle is stopped for a longer period than the threshold, the social property index associated with the stop time is an estimation result.

(Appendix 15)
Whether the reference parameter of the independent living degree includes an index associated with a predetermined living behavior, and whether the estimation unit corresponds to the predetermined living activity based on the position information of the monitoring target person and the stop time The monitoring system according to any one of supplementary notes 11 to 14, wherein an index associated with the living activity is determined as an estimation result of the independent living degree when applicable.

(Appendix 16)
The monitoring system according to supplementary note 15, wherein the predetermined living behavior includes meal, excretion, bathing, sleep, movement or care.

(Appendix 17)
An RF tag detection method using an RF tag detection device comprising a plurality of loop coil antennas, wherein each of the plurality of loop coil antennas is provided with a coil cutting switch,
An antenna switching step of switching to and selecting one of the plurality of loop coil antennas;
An opening / closing step of closing a coil cutting switch of the loop coil antenna selected by switching by the antenna switching step and opening a coil cutting switch of the other unused loop coil antenna;
A detection step in which the loop coil antenna selected by switching detects the RF tag based on information received from the RF tag by electromagnetic induction;
An RF tag detection method comprising:

(Appendix 18)
The RF tag detection method according to appendix 17, wherein the antenna switching step switches the antenna to be used in a time-sharing manner in a predetermined order in the plurality of loop coil antennas.

(Appendix 19)
19. The RF tag detection method according to appendix 17 or 18, wherein each of the plurality of loop coil antennas is used for both transmission and reception.

(Appendix 20)
The RF tag detection method according to appendix 17 or 18, wherein each of the plurality of loop coil antennas includes a transmission loop coil antenna and a reception loop coil antenna.

(Appendix 21)
The RF tag detection method according to any one of appendices 17 to 20, further comprising a step of attaching the RF tag to one or a plurality of detection subjects or one or a plurality of detection targets.

(Appendix 22)
The RF tag detection method according to any one of appendices 17 to 21, wherein the RF tag is a passive tag and is fed from the plurality of loop coil antennas.

(Appendix 23)
The RF tag detection method according to any one of appendices 17 to 22, wherein the plurality of loop coil antennas are arranged in a plane to form a detection block.

(Appendix 24)
In the detection block group formed by arranging a plurality of the RF tag detection devices and arranging the respective detection blocks in a plane, antenna switching performed in each detection block is performed between the detection blocks included in the detection block group. 24. The RF tag detection method according to appendix 23, wherein synchronization is performed.

(Appendix 25)
25. The RF tag detection method according to appendix 24, wherein antenna switching is performed in synchronization between detection blocks included in the detection block group so that the relative positions of the loop coil antennas used in each detection block are the same.

(Appendix 26)
A monitoring method for monitoring a monitoring target person to which an RF tag is attached using the RF tag detection method according to any one of appendices 17 to 25,
Location information storage step for storing location information where the plurality of loop coil antennas are installed in association with identification information of the plurality of loop coil antennas;
A log recording step of acquiring the corresponding location information stored by the location information storage step from the identification information of the loop coil antenna that has detected the RF tag, and recording it in association with the detected time information;
Including monitoring methods.

(Appendix 27)
A reference parameter setting step for setting a reference parameter for determining the degree of risk, sociality or independence of the person to be monitored;
An estimation step of estimating the risk level, sociality, or independent living degree of the monitoring target person based on the location information and time information recorded by the log recording step with reference to the reference parameter set by the reference parameter setting step When,
27. The monitoring method according to appendix 26.

(Appendix 28)
The risk reference parameter includes a threshold value for a time to stop at a predetermined location, and the estimation step corresponds to the predetermined location when the monitoring target person stays at the predetermined location for a time longer than the threshold value. 28. The monitoring method according to appendix 27, wherein the attached risk index is an estimation result.

(Appendix 29)
The sociability standard parameter includes a threshold value of a distance between the monitoring target and the other monitoring target, and the estimation step determines the number of times the distance between the monitoring person and the other monitoring person is closer than the threshold value. 29. The monitoring method according to appendix 27 or 28, wherein the number is determined to be the number of persons having contact with the person, and the sociability index associated with the number of persons is the estimation result.

(Appendix 30)
The sociability reference parameter includes a threshold value of a time during which the social parameter stays within a predetermined distance from another monitoring target, and the estimation step includes 30. The monitoring method according to any one of appendices 27 to 29, wherein when the vehicle is stopped for a long time, the social property index associated with the stop time is an estimation result.

(Appendix 31)
Whether the reference parameter of the independent living degree includes an index associated with a predetermined living behavior, and whether the estimation unit corresponds to the predetermined living activity based on the position information of the monitoring target person and the stop time 31. The monitoring method according to any one of appendices 27 to 30, wherein, if applicable, an index associated with the living activity is used as an estimation result of the independent living degree.

(Appendix 32)
The monitoring method according to supplementary note 31, wherein the predetermined living behavior includes eating, excretion, bathing, sleeping, moving, or care.

(Appendix 33)
An RF tag detection program by an RF tag detection device comprising a plurality of loop coil antennas, wherein each of the plurality of loop coil antennas is provided with a coil cutting switch,
An antenna switching function for selecting and switching to one loop coil antenna of the plurality of loop coil antennas;
An open / close function to close the coil cutting switch of the loop coil antenna selected by switching by the antenna switching function, and to open the coil cutting switch of the other unused loop coil antenna;
A detection function for detecting the RF tag based on information received from the RF tag by the electromagnetic induction method by the loop coil antenna selected by switching;
RF tag detection program that realizes

(Appendix 34)
34. The RF tag detection program according to appendix 33, wherein the antenna switching function switches antennas used in a time division manner in a predetermined order in the plurality of loop coil antennas.

(Appendix 35)
The RF tag detection program according to attachment 33 or 34, wherein each of the plurality of loop coil antennas is used for both transmission and reception.

(Appendix 36)
The RF tag detection program according to appendix 33 or 34, wherein each of the plurality of loop coil antennas includes a transmission loop coil antenna and a reception loop coil antenna.

(Appendix 37)
The RF tag detection program according to any one of supplementary notes 33 to 36, further comprising a step of attaching the RF tag to one or a plurality of detection subjects or one or a plurality of detection targets.

(Appendix 38)
The RF tag detection program according to any one of 33 to 37, wherein the RF tag is a passive tag and is fed from the plurality of loop coil antennas.

(Appendix 39)
The RF tag detection program according to any one of 33 to 38, wherein the plurality of loop coil antennas are arranged in a plane to form a detection block.

(Appendix 40)
In the detection block group formed by arranging a plurality of the RF tag detection devices and arranging the respective detection blocks in a plane, antenna switching performed in each detection block is performed between the detection blocks included in the detection block group. 40. The RF tag detection program according to appendix 39, which is synchronized.

(Appendix 41)
41. The RF tag detection program according to appendix 40, wherein antenna switching is performed in synchronization between the detection blocks included in the detection block group so that the relative positions of the used loop coil antennas in each detection block are the same.

(Appendix 42)
A monitoring program for monitoring a monitoring target person attached with an RF tag using the RF tag detection program according to any one of appendices 33 to 41,
A location information storage function for storing location information where the plurality of loop coil antennas are further installed in the computer in association with identification information of the plurality of loop coil antennas;
A log recording function for acquiring the corresponding location information stored by the location information storage step from the identification information of the loop coil antenna that has detected the RF tag, and recording it in association with the detected time information;
Monitoring program that realizes.

(Appendix 43)
A reference parameter setting function for setting a reference parameter for determining the degree of risk, sociality or independence of the person to be monitored;
An estimation function that estimates the risk level, sociality, or independent living degree of the monitoring target person based on the location information and time information recorded by the log recording function with reference to the standard parameter set by the standard parameter setting function When,
45. The monitoring program according to appendix 42, which further realizes

(Appendix 44)
The risk reference parameter includes a threshold value for a time to stop at a predetermined location, and the estimation function corresponds to the predetermined location when the monitoring subject has stopped at the predetermined location for longer than the threshold value. 44. The monitoring program according to appendix 43, wherein the attached risk index is an estimation result.

(Appendix 45)
The sociability standard parameter includes a threshold value of a distance between the monitoring target and the other monitoring target, and the estimation step determines the number of times the distance between the monitoring person and the other monitoring person is closer than the threshold value. 45. The monitoring program according to appendix 43 or 44, wherein the number of persons having contact with the person is determined, and the sociability index associated with the number of persons is estimated.

(Appendix 46)
The sociability reference parameter includes a threshold value of a time during which the social parameter is stopped within a predetermined distance from another monitoring target, and the estimation step is performed by the monitoring person within a predetermined distance from the threshold value within the predetermined distance. 46. The monitoring program according to any one of supplementary notes 43 to 45, wherein when the vehicle is stopped for a long time, the sociality index associated with the stop time is an estimation result.

(Appendix 47)
Whether the reference parameter of the independent living degree includes an index associated with a predetermined living behavior, and whether the estimation unit corresponds to the predetermined living activity based on the position information of the monitoring target person and the stop time 47. The monitoring program according to any one of appendices 43 to 46, in which, if applicable, an index associated with the living activity is used as an estimation result of the independent living degree.

(Appendix 48)
48. The monitoring program according to appendix 47, wherein the predetermined living behavior includes meal, excretion, bathing, sleep, movement or care.

(Appendix 49)
The RF tag detection device according to any one of supplementary notes 1 to 7 or the RF tag detection system according to supplementary note 8 or 9, wherein the location and time of the subject wearing the RF tag are located using the RF tag detection device. A monitoring system that identifies the degree of independence or risk of a subject based on a predetermined criterion based on information on a specified place and time.

(Appendix 50)
Using the RF tag detection method according to any one of appendices 17 to 25, the location and time at which the subject wearing the RF tag is located are identified, and based on the information on the identified location and time, based on a predetermined criterion A monitoring method for detecting the degree of independence or risk of a subject.

(Appendix 51)
The computer is caused to execute the RF tag detection program according to any one of appendices 33 to 41, and the location and time at which the subject wearing the RF tag is located is specified, and predetermined determination is performed from the specified location and time information. A monitoring program that realizes a function of detecting the degree of independence or risk of a subject based on a standard.

(Appendix 52)
The RF tag detection device according to any one of supplementary notes 1 to 7 or the RF tag detection system according to supplementary note 8 or 9, wherein the RF tag detection device is used to identify the subject subject among the subjects wearing the RF tag. The monitoring system which acquires the distance and time information with each other test subject other than that, and determines the social property of a target test subject based on the predetermined criteria from the acquired distance and time information.

(Appendix 53)
Using the RF tag detection method according to any one of appendices 17 to 25, information on distance and time between the subject subject and the other subjects among the subjects wearing the RF tag is obtained, and the obtained distance Monitoring method for determining the sociability of a subject subject based on a predetermined determination criterion from time and time information.

(Appendix 54)
A computer is caused to execute the RF tag detection program according to any one of appendices 33 to 41, and information on the distance and time between the subject subject and each other subject among the subjects wearing the RF tag is acquired. The monitoring program which implement | achieves the function which determines the social property of an object subject based on the predetermined | prescribed determination criterion from the acquired distance and time information.

  It can be used when the person to be monitored is a disabled person, a nursing home for aged people, a hospital, and generally when a guardian confirms the safety of a remote elderly person.

DESCRIPTION OF SYMBOLS 10 RF tag 14 The magnetic field which the loop coil antenna in a transmission operation state emits 18 The magnetic field generated by antenna interference 20 Loop coil antenna 22 Floor mat surface fiber 24 Magnetic sheet 26 Floor mat back surface fiber 30 Antenna changeover switch 40 Controller (reader / writer)
50 Coil cutting switch 60, 62, 64, 70 Target person 100 RF tag detection device 110 Antenna switching control unit 120 Coil cutting control unit 130 Transmitter / receiver 140 Controller control unit 150 RF tag detection unit 160 Storage unit 170 Communication unit 200 Detection cell 300 Detection block 400 Floor mat 500 Monitoring system 510 Time log storage unit 520 Location data management unit 530 Parameter setting unit 540 Data processing unit 550 Provider terminal 560 Provider (service provider)
570 clients (supervisor / guardian)
580 Client terminal 600 evaluation system

Claims (14)

A plurality of loop coil antennas that communicate with the RF tag by electromagnetic induction;
An antenna switching means for switching and selecting one of the plurality of loop coil antennas;
Detecting means for detecting the RF tag based on information received from the RF tag by the loop coil antenna selected by switching by the antenna switching means;
A coil cutting switch is provided in each of the plurality of loop coil antennas, the coil cutting switch of the loop coil antenna selected by switching by the antenna switching means is closed, and the coil of the other unused loop coil antenna Provided with a plurality of RF tag detection devices that detect the RF tag with the disconnect switch open,
The plurality of loop coil antennas are arranged in a plane to form a detection block,
An RF tag detection system in which detection blocks are arranged side by side to form a detection block group, and antenna switching performed in each detection block is synchronized between the detection blocks included in the detection block group.   The RF tag detection system according to claim 1, wherein antenna switching is performed in synchronization between detection blocks included in the detection block group so that the relative positions of the loop coil antennas used in each detection block are the same.   The RF tag detection apparatus used for the RF tag detection system according to claim 1 or 2, wherein the antenna switching means switches the antenna to be used in a time-sharing manner in a predetermined order in the plurality of loop coil antennas.   The RF tag detection apparatus used for the RF tag detection system according to any one of claims 1 to 3, wherein each of the plurality of loop coil antennas is used for both transmission and reception. Each of said plurality of loop coil antenna is, RF tag detection apparatus according to use in RF tag detection system according to claim 1 or 2 comprising a transmitter loop coil antenna and the receiving loop coil antenna.   The RF tag detection apparatus used for the RF tag detection system according to any one of claims 1 to 5, wherein the RF tag is a passive tag and is fed from the plurality of loop coil antennas. A plurality of loop coil antennas that communicate with an RF tag by an electromagnetic induction method and are arranged side by side to form a detection block;
A group of detection blocks arranged in a plane on each of the detection blocks;
An antenna switching means for switching and selecting one of the plurality of loop coil antennas;
Detecting means for detecting the RF tag based on information received from the RF tag by the loop coil antenna selected by switching by the antenna switching means;
A coil cutting switch is provided in each of the plurality of loop coil antennas, the coil cutting switch of the loop coil antenna selected by switching by the antenna switching means is closed, and the coil of the other unused loop coil antenna An RF tag detection method comprising a plurality of RF tag detection devices for detecting an RF tag with a disconnect switch open.
An antenna switching step of switching and selecting one of the plurality of loop coil antennas;
An opening / closing step of closing a coil cutting switch of the loop coil antenna selected by switching by the antenna switching step and opening a coil cutting switch of the other unused loop coil antenna;
A detection step of detecting the RF tag based on information received from the RF tag by the electromagnetic induction method by the loop coil antenna selected by switching,
An RF tag detection method in which antenna switching performed in each detection block is synchronized between detection blocks included in the detection block group. A plurality of loop coil antennas that communicate with an RF tag by an electromagnetic induction method and are arranged side by side to form a detection block;
A group of detection blocks arranged in a plane on each of the detection blocks;
An antenna switching means for switching and selecting one of the plurality of loop coil antennas;
Detecting means for detecting the RF tag based on information received from the RF tag by the loop coil antenna selected by switching by the antenna switching means;
A coil cutting switch is provided in each of the plurality of loop coil antennas, the coil cutting switch of the loop coil antenna selected by switching by the antenna switching means is closed, and the coil of the other unused loop coil antenna A plurality of RF tag detection devices that detect RF tags with the disconnect switch open are provided.
An RF tag detection program by the plurality of RF tag detection devices,
An antenna switching function for switching and selecting one of the plurality of loop coil antennas on the computer;
An open / close function to close the coil cutting switch of the loop coil antenna selected by switching by the antenna switching function, and to open the coil cutting switch of the other unused loop coil antenna;
A detection function for detecting the RF tag based on information received from the RF tag by the electromagnetic induction method by the loop coil antenna selected by switching;
A function of synchronizing the antenna switching performed in each detection block between the detection blocks included in the detection block group;
RF tag detection program that realizes   The RF tag detection system according to claim 1 or 2, wherein an RF tag detection device is used to identify a location where a subject wearing the RF tag is located and a time when the subject was in the location, A monitoring system that detects the degree of independence or risk of a subject from time information based on a predetermined criterion.   Using the RF tag detection method according to claim 7, a place where the subject wearing the RF tag is located and a time when the subject was in the place are specified, and a predetermined determination criterion is obtained from the information on the specified place and time. A monitoring method for detecting the degree of independence or risk of a subject based on the above.   A computer is caused to execute the RF tag detection program according to claim 8, and a place where the subject wearing the RF tag is located and a time when the subject is in the place are specified, and predetermined information is obtained from the specified location and time information. The monitoring program which implement | achieves the function which detects a test subject's independence life degree or a risk based on the determination criteria of this. The RF tag detection system according to claim 1 or 2 is used, and information on the distance and contact time with other subjects is obtained for the subject subject among the subjects wearing the RF tag using the RF tag detection device. and, the monitoring system determines the sociability of the target subject based on the acquired distance and a contact time information to a predetermined criterion. Using the RF tag detection method according to claim 7, information on the distance and contact time between the subject and the other subjects is obtained for the subject subject among the subjects wearing the RF tag, and the obtained distance and contact time are obtained. A monitoring method for determining sociability of the subject subject based on a predetermined determination criterion from information. The computer is caused to execute the RF tag detection program according to claim 8, and information on distances and contact times with other subjects is obtained for the subject subject among the subjects equipped with the RF tag, and the obtained distance is obtained. And a monitoring program that realizes a function of determining the sociability of the subject subject based on a predetermined determination criterion from the contact time information.