JP3264414B2 - Movement detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movement detection method for detecting the direction of movement of a moving object, and more particularly to a movement detection method having individual discrimination ability and suitable for dynamic presence detection.

[0002]

2. Description of the Related Art FIG. 7 shows a schematic configuration of a conventional moving direction detecting system. In FIG. 7, 201 and 202 are entrances and exits of the passage, 203 and 205 are light emitting devices, 204 and 206 are light receiving devices, 220 is a direction detecting device, and 230 is a wall that partitions the passage. 203 and 204 and 205 and 206 are paired, respectively. When the detection target occupies a space between each pair, the light emitted from 203 or 205 becomes 20
4 or 206, the presence of the detection target is detected. When the detected object moves from the left side to the right side of the apparatus between 230 and 230, first, it is detected that the detected object exists between 203 and 204.
It is detected that the detection target exists during the period 06. Conversely, when moving from the right side to the left side, first, it is detected that the detection target exists between 205 and 206, and then
It is detected that an object to be detected exists between and. 220 detects whether the detection target has moved from the left to the right and moved from the right to the left from the detection order.

In the configuration shown in FIG. 7, the moving place is limited to 230, and only one object can be detected at a time. In order to detect the next object to be detected, the detection must be completed. Must.

FIGS. 8 (1) to 8 (3) are operation examples of FIG. In the state of (1) in FIG. 8, the subject has not yet approached the device, and neither the light between 203 and 204 nor the light between 205 and 206 is blocked.
In (2) of FIG. 8, since the detected person has approached between 203 and 204, the light between 203 and 204 is blocked.
It is detected that there is a subject between 03 and 204.
In (3) of FIG. 8, the light between 205 and 206 is blocked because the detected person has approached between 205 and 206.
It is detected that there is a subject between 05 and 206.
From this series of operations, the person to be detected first enters the left 203
And 204, and then the right 205
It can be determined that the subject has moved from the left side to the right side from the fact that it is detected that the subject is between the steps 206 and 206. As described above, the moving direction of the detected person is detected in the order in which the detected persons are detected by the two detection devices.

FIG. 8 (4) shows an example of a conventional system for performing individual recognition in addition to detecting the moving direction. An apparatus 241 reads the individual identification information from the ID card on which the individual identification information is recorded, and is used when the subject moves from left to right in the figure. 242 is also used to move from right to left, contrary to 241.

In order to perform individual identification by the conventional method, as shown in FIG.
1 or 242 to provide their own identification information to the device.

Further, in the conventional method, even if the detected person just happens to pass by, the device is activated if the person enters the detection area for a short time. Furthermore, conventionally, in order to independently detect transponders in a plurality of detection areas, it was necessary to install as many interrogators as the required number of detection areas.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is that the number of simultaneous detections in the conventional method is limited to one at a time, that a moving route is limited to a narrow path, and that individual identification is performed. It is an object of the present invention to provide a movement detection method that solves the problem that a detection target has to perform an operation of notifying individual identification information.

Another object of the present invention is to prevent an object to be detected from being erroneously detected when the interrogators are detected in the order of arrangement of the interrogators.

It is still another object of the present invention to improve a mechanism in which a device operates by automatic detection even if the operation is unnecessary when the device enters a detection range.

Still another object of the present invention is to provide, in the conventional system, the same number of interrogators as the number of necessary detection areas in order to independently detect transponders in a plurality of detection areas for each detection area. It is an object of the present invention to solve the necessity, and to provide a plurality of independent detection areas with one interrogator.

[0012]

The most important aspect of the present invention is to use the individual identification information of the radio communication and the transponder and the detection time of the transponder in each interrogator for detecting the moving direction of the moving object. Features. It is different from the conventional technology in that information is transmitted in a non-contact manner, and since the existence is confirmed using the individual identification information, a plurality of moving situations can be individually detected at the same time.

[0013]

The object to be detected is detected by an interrogator attached to the object to be detected or a transponder owned by the object to be detected. The identification of the detection target is performed by the interrogator receiving the interrogation signal transmitted by the interrogator as a radio signal and knowing that the interrogator is in the detection area of the interrogator. The interrogator transmits the individual identification symbol as a wireless signal, and the interrogator receives it. Each time the interrogator detects a transponder, it notifies the position information storage device of the individual identification information of the detected transponder. The location information storage device records the individual identification information of the transponder notified from the interrogator, together with the unique identification number of the interrogator. The position of the transponder can be known by associating the unique identification number of the interrogator with the installation location of the interrogator. At that time, the time when the individual identification information of the transponder is notified from the interrogator is also recorded. In the detection of the moving direction, the individual identification information of the transponder, the unique identification number of the interrogator, and the detection time recorded in the position information storage device are tracked for each individual identification information of the transponder, and the detection time difference for each interrogator is determined. This is done by reference. Knowing the detection time of each interrogator, it can be understood that the detection target having a transponder having certain individual identification information has moved from a place where the detection time is earlier to a place where the detection time is later, and can know the moving direction. .

An interrogator which first detects a person to be detected when the detection range of a plurality of interrogators arranged linearly does not move in the order in which the interrogators are installed, Focusing on the interrogator detected last, when the interrogator detected first and the interrogator detected last are the same interrogator, it is regarded as not passing through this detection device, and the direction is not detected, When the interrogator detected first and the interrogator detected last are different interrogators, by detecting the direction based on the positional relationship between the interrogator detected first and the interrogator detected last, the movement direction False detection can be prevented.

When the device is operated by automatic detection, when the detection target happens to cross the detection area,
Do not operate the equipment when the time when the target is detected in the detection area is less than the fixed time derived in consideration of the time required for the target to normally cross the detection area. Thereby, unnecessary operation of the device can be prevented.

Further, a plurality of directional antennas are installed in the interrogator and switched as necessary, and the individual identification information received by the antennas from the transponders together with the unique identification numbers of the respective antennas together with the position identification information By communicating to the information storage device, one interrogator can respond to the transponders of multiple detection areas,
Detection can be performed independently for each detection area.

[0017]

FIG. 1 is a block diagram showing a system configuration of a movement detection system according to the present invention. In the figure, 101 and 102
Is an interrogator, 111 is a responder, and 120 is a position information storage device. The interrogator 101 includes an interrogation signal transmitter 11, which transmits an interrogation signal, a transponder 111, an individual identification information receiving unit 12 which receives individual identification information from other transponders, and a position information storage device which stores the received individual identification information. And an individual identification information transmitting unit 13 for transferring the information to the transmission unit 120. The configuration of the interrogator 102 is the same as that of the interrogator 101. In FIG. 1, only two interrogators 101 and 102 are shown, but in general N (N is 2
The interrogator of the above integer) is set along the moving direction of the moving object. The interrogator 111 includes an interrogation signal receiving unit 21 for receiving interrogation signals of the interrogators 101, 102,..., An individual identification information transmitter 22 for transmitting individual identification information in response to an interrogation signal of the interrogator or voluntarily. Consists of The transponder 111 moves accompanying a moving object (not shown). For each moving object,
A transponder such as 111 is possessed. The position information storage device 120 receives the individual identification information sent from each of the interrogators 101, 102,..., And stores the individual identification information sent from each of the interrogators into the unique identification of the interrogator. A position information storage database 122 that records the number and the reception time, and a movement direction detection unit 12 that detects a movement direction based on information stored in the database 122.
3. It has a moving direction transmitting unit 124 for transmitting the detected moving direction to an external application device, and a time detection timer 125. When the interrogator shares the input terminal of the position information storage device depending on the connection method between the interrogator and the position information storage device, the unique identification number of the interrogator is added to the individual identification information on the interrogator side. When the unique identification number of the interrogator is transmitted and an individual input terminal is provided in the position information storage device 120 for each interrogator, the unique identification number of the interrogator is obtained from the input terminal.

FIG. 2 shows a signal flow between the interrogator, the transponder, and the location information storage device. Here, the interrogator is 101,
The responder is 111.

The interrogator 101 transmits an interrogation signal at all times or at regular time intervals. The transponder 111 moves accompanying the moving object, enters the interrogation signal detection area of the interrogator 101, and transmits the individual identification information when receiving the interrogation signal of the interrogator 101. The interrogator 101 receives the individual identification information of the responder 111 and transmits the individual identification information to the interrogator 1.
01 to the position information storage device 120
Send to If the unique identification number of the interrogator can be identified by the position information storage device 120, the transmission of the unique identification number from the interrogator can be omitted. The position information storage device 120 stores the individual identification information obtained from the interrogator 101 and the interrogator 10
1 and the detection time obtained from the time detection timer 125 are stored in the position information storage database 12212.
Record in 2. The position information storage database 122 additionally records the detected unique identification number of the interrogator and the detection time for each individual identification information. However, if data of the same unique identification number is obtained continuously, no additional recording is performed, and only the detection time is updated. The movement direction detection unit 122 refers to the position information storage database 122 voluntarily or in response to an inquiry from an external application device, checks the record of the unique identification number and the detection time for each individual identification information, The moving direction is detected from the difference between the detection times for each. The movement direction information transmission unit 124 spontaneously every time a movement is detected, or in response to an inquiry from an external application device,
Inform the external application device of the moving direction.

Hereinafter, embodiments of the present invention will be described. <Embodiment 1> FIG. 3 shows a first embodiment of the present invention.
01-102 are interrogators, 131-132 are 101-10
2. Interrogator detection areas corresponding to 2 respectively, 141 to 1
46 denotes a detected person who is moving with the responders 111 to 116, and 120 denotes a position information storage device. Here, 10X is represented on behalf of one of the interrogators 101 to 102.
And the corresponding detection area is represented by 13X.
Similarly, any transponder is designated 11X.

The detected person 14X moves freely without being conscious of the detection, but when the 11X enters the 13X area, the 11X receives the question information from the 10X, and thereby the detection area of the 10X. Knowing that it has entered, the individual identification information is transmitted to 10X. Also, when the detected person 14X moves and the 11X enters another area 13Y, similarly, the individual identification information is transmitted to the corresponding 10Y. Each detection area is arranged with a distance that does not cause erroneous detection according to the position resolution of the interrogator. The individual identification information detected in this way is recorded in the position information storage device 120 with the unique identification number of the interrogator and the detection time added thereto.
The moving direction is detected from the time difference detected by each interrogator. In the first embodiment, it is not necessary for the person to be detected to move in a narrow path in a line in order for each person, and can freely move back and forth without being conscious of the detection device. In addition, individual identification is performed at the same time, and in this case, the detected person does not need to be conscious of the detection device and does not need to perform any operation.

<Embodiment 2> FIG. 4 is a view for explaining Embodiment 2. Each element in FIG. 4 corresponds to FIG. FIG.
(1) shows the subject 141 who has the transponder 111
Is returned during the detection by the interrogator 101 in the detection area 131, and returns to the original direction without going to the next detection area 132. FIG. 4B shows the subject 1 having the transponder 111.
An example in which 41 is detected in 101 at 131 and returned during detection in 102 at 132, is again detected by 101 at 131, and returns to the original direction. FIG. 4C shows a detected object having the transponder 111. 141 is detected by 101 at 131, and 13
In FIG. 4, an example of returning to 102 during detection at 102, returning to 131 again at 101 during detection, returning again to 132 during detection at 102, detecting at 101 at 131, and returning to the original direction, FIG. In 4), the subject 141 having the transponder 111 is detected by 101 at 131, and 10
2 shows an example in which the signal is returned during the detection, and the signal is detected again at 131 at 101 while the signal is detected at 101 again.

When the detected person performs an operation other than simple passing as shown in (1) to (4) of FIG. 4, these position records are stored in the position information storage database 122 of the position information storage device 120. The history of information is recorded. However, the moving direction detection unit 123 focuses on the interrogator detected first and the interrogator detected last, and as shown in (1) to (4) of FIG. When the interrogator detected last is the same interrogator, it is regarded that the vehicle has not passed, and the detection of the moving direction is not performed. Further, as shown in (4) of FIG. If the interrogator and the last detected interrogator are different interrogators, direction detection is performed ignoring the interrogators other than the first detected interrogator and the last detected interrogator. When the detection areas 131 and 132 are separated from each other, for example, in (2) of FIG. 4, detection is not performed in the detection area 132 and then detection is performed in the detection area 132 to determine whether the detected person has passed or returned. When the detection is not performed again in the detection area 131 or 132 within the predetermined time after the detection is stopped, it is determined that the operation has returned. In the second embodiment, it is possible to appropriately detect the moving direction regardless of the route taken by the subject at the time of detection.

<Embodiment 3> FIG. 5 is a diagram for explaining a third embodiment. FIG. 5A shows an example in which the door is automatically opened based on the individual identification information.
10 is an automatic door, 311 and 312 are transponders, 320 is an interrogator connected to a control device (not shown) of the automatic door 310, and 330 is a detection range of the interrogator 320. When the responders 311 and 312 possessed by the subject enter the detection range 330 of the interrogator 320, the interrogator 320
Although the control device of the automatic door 310 connected to the interrogator 320 obtains the individual identification information 312, even if the control device of the automatic door 310 receives the individual identification information, the detection target usually crosses the 330 like the responder 312. The automatic door 310 is not opened unless the subject holding the responder 312 stays at 330 for a certain period of time derived from the time required for the operation.

FIG. 5B shows an example of a chasing telephone (automatic transfer telephone) for automatically routing to an extension telephone by individual identification. Reference numeral 340 denotes a desk, reference numeral 350 denotes an extension telephone, and otherwise, FIG. (1). However, interrogator 3
Reference numeral 20 is connected to the control device of the automatic call transfer telephone. As in (1) of FIG. 5, the responders 311 and 3 held by the subject
When the device 12 enters the detection range 330 of the interrogator 320, the interrogator 320 obtains the individual identification information of the responders 311 and 312. Is received, usually, a certain time derived from the time required for the detection target person to cross the 330, for example, the responder 312 possessed by the detection target
Otherwise, the transfer registration of the incoming call is not performed in the telephone 350.

In the third embodiment, a device having an automatic identification device using individual identification information operates even if the detected person only passes by nearby and does not wish to operate. Inconvenience can be eliminated.

<Embodiment 4> FIG. 6 is a diagram for explaining a fourth embodiment. In FIG. 6, 150 indicates an interrogator, and 151 and 152 indicate 150 detection areas. Otherwise, it is the same as FIG. In the case of the present embodiment, the interrogator 150 is a single
Have two (generally more than one) antennas with 1,152 and recognize the transponders 111, 112,.
Which antenna has been recognized by the position information storage device 12
0 and a means for switching these antennas as necessary. In FIG. 6, the detection area 15
1, when the transponder 11X enters the interrogator 150 in the detection area 151 of one of the antennas of the interrogator 150.
50, the individual identification information of the transponder 11X is transmitted to the position information storage device 120 together with the unique identification number of the antenna having the detection area 151. It should be noted that the two regions can be simultaneously detected by different directional antennas, respectively. However, when the antennas are switched, the interrogator sets a sufficiently short interval to the time when the transponder passes through the respective detection regions of the antenna. The antenna may be switched with. In the fourth embodiment, the same effect can be obtained as if a plurality of interrogators were installed with one interrogator.

[0028]

According to the first aspect of the present invention, since the individual movement directions can be detected by the spontaneous position registration of the transponder, the detection target does not need to be aware of the detection or operate. The convenience is remarkably improved, and there is an effect that the present invention can be applied to a case where both hands are occupied, an inability to operate, and an animal or luggage which cannot operate itself.

According to the second aspect of the present invention, the operation of the first aspect of the present invention is compensated for, and the moving direction is appropriately detected regardless of the route on which the object to be detected moves upon detection. There is an effect that can be.

According to the third aspect of the present invention, in a device that automatically operates by automatic detection in a wireless system, there is an effect of preventing unnecessary operation of a device only when the device crosses a detection range.

According to the fourth and fifth aspects of the present invention, since one interrogator plays the role of a plurality of interrogators, the effect of simplifying the configuration of the entire system, saving space and reducing costs can be obtained. There is.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of a movement detection method according to the present invention.

FIG. 2 is a diagram showing a signal flow between a transponder, an interrogator, and a position information storage device in FIG. 1;

FIG. 3 is a diagram illustrating a first embodiment of the present invention.

FIG. 4 is a diagram for explaining a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a third embodiment of the present invention.

FIG. 6 is a diagram for explaining a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a schematic configuration of a conventional movement detection method.

FIG. 8 is a diagram showing an operation example of FIG. 7;

[Explanation of symbols]

 101, 102 Interrogator 111 Transponder 120 Position information storage device 121 Individual identification information receiving unit 122 Position information storage database 123 Moving direction detecting unit 124 Moving direction information transmitting unit 125 Time detection timer

Continuation of the front page (72) Inventor Nobuki Mizuno 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Bunshin Kawamura 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Within Telephone Co., Ltd. (72) Inventor Satoshi Baba 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Hiroto Hara 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone (72) Inventor Kozo Kobayashi 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-5-100019 (JP, A) JP-A-5-282502 ( JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01P 13/00 G01S 13/74 G01V 3/12

Claims (5)

(57) [Claims] 1. An interrogator, comprising: a plurality of interrogators; a transponder that moves accompanying a moving object and responds to the interrogator; and a position information storage device connected to each of the interrogators. A movement detection method for detecting a direction of movement of an object, wherein the responder responds to an instruction signal from the interrogator or voluntarily transmits individual identification information for identifying itself to the interrogator. Having the interrogator, at an appropriate distance from other interrogators according to the resolution of position detection, at least two or more installed in the direction of movement of the moving object to be detected, each interrogator, Means for receiving the individual identification information from the transponder and sending it to the position information storage device, wherein the position information storage device stores the individual identification information from each interrogator in association with each interrogator Means and when the transponder moves with the moving object Means for detecting a difference in the detection time of the individual identification information in each of the interrogators that occurs. 2. The movement detection method according to claim 1, wherein
The position information storage device includes means for storing the history of the individual identification information from the interrogator, and means for measuring the time from when the transponder is not detected until it is detected again. . 3. The movement detection method according to claim 1, wherein
The position information storage device includes means for detecting the continuous reception time of the same individual identification information, and means for invalidating the detection when the continuous reception time of the same individual identification information from the transponder is less than a predetermined time. A movement detection method comprising: 4. The movement detection method according to claim 1, wherein
One interrogator has two or more directional antennas, has two or more independent detection areas, and knows from which detection area the individual identification information received from the transponder was obtained. A movement detection method comprising means. 5. The movement detection method according to claim 4, wherein
A movement detection method, wherein an operation time of an antenna is switched by the interrogator.