JP3171310B2 - Moving object detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object detection apparatus, and more particularly, to a gate installed by a person at an entrance or exit in entrance / exit management at an entrance / exit of a security room, or management of carry-in / take-out of articles. When passing, including the state of entry and exit, entry and exit,
The present invention relates to a moving object detection device capable of detecting entry and exit of a person or an article.

[0002]

2. Description of the Related Art As a conventional moving object detecting apparatus, for example, a transponder is attached to a person or an article, and the passage of the transponder is read by a reader (identifying apparatus) having an antenna, so that a person enters / leaves a room, enters / exits an article. Etc. are managed or monitored. As a device for attaching a transponder to a person or an article and controlling entry and exit, for example, JP-A-62-26573 or Japanese Patent Application No. 6-261500 filed by the present applicant can be mentioned.

FIG. 11 shows a basic configuration of this type of monitoring system. The monitoring system 1 includes a reader 2 and a host computer (hereinafter referred to as a host) 3, which are usually connected via a dedicated line or a public line via a modem. This connection is generally made by a line 6 of the RS-232C interface or a LAN connection. The reader 2 is a monitoring sensor that detects a transponder by transmitting / receiving to / from a so-called transponder using radio waves, and transmits radio frequency radio waves from the antenna 21 to the rod-type transponder 4 or the card / tag-type transponder 5. The radio wave transmitted from the transponder side is received by the antenna, the identification code is detected, and the serial code is converted internally into parallel / serial data to RS-232.
Send it to a line such as C. The reader 2 includes, for example, a reception circuit 22, a demodulation circuit 23, a controller 24, a communication circuit 25, and the like.
Transmission and reception are performed at a period of 100 msec, where sec is a transmission period and the next 50 msec is a reception period.

The transmitting / receiving antenna 21 transmits, for example, an FM wave to the rod-shaped transponder 4 or the card-type or tag-type transponder 5 at a predetermined period, and receives an identification code transmitted from the transponder side upon receiving the FM wave. Receive the modulated FM signal. The received signal is
The signal is amplified by the receiving circuit 22 and the identification code portion is converted into a serial digital value by the demodulation circuit 23 and extracted. When the identification code is detected, the controller 24 receives the identification code, sets the identification code in an internal register, serially transmits the identification code to the communication circuit 25, transmits the identification code to the line 6, and transmits the identification code to the host 3.

[0005] The host 3 first performs date and time management on the received identification code. Then, normally, a signal for resetting the register is transmitted to cause the reader to execute re-detection. As a result, the same identification code is transmitted from the reader 2 many times. The host 3 also receives identification codes from similar readers arranged in different places, and performs entry / exit management and entry / exit management based on identification codes from some readers and information such as the location, date and time, etc. .

This type of transponder has a problem in that when it is driven by a battery, there is a problem in that its consumption is problematic. (Burst signal) is received by the transponder, and the capacitor is charged using the energy of this radio wave. Then, using this capacitor as a battery, the transponder sends back the identification code unique to the individual held by radio waves. Note that the transmission circuit is not shown in the figure.

[0007]

Conventionally, when a transponder is attached to a passing person or article, and a reader (identification device) having an antenna is installed at an entrance and reads, a reader or a terminal device having a reader (hereinafter referred to as a terminal) is used. Then
Although it is possible to recognize that a specific person or individual of an article has passed through the monitoring area, it is not possible to confirm the entry / exit direction such as entry / exit, entry / exit, etc. It simply sends identification information, detection time, and the like to the host computer. As a result, the processing load of entry / exit management and entry / exit management on the host computer side increases. In order to reduce the entry / exit management and entry / exit management processing on the host computer side, it is conceivable that information on the entry / exit to be monitored is obtained on the reader or terminal side and sent to the host computer side. so,
There is a problem that it is not possible to accurately control entry / exit and entry / exit.

For example, when monitoring directions are provided by providing two monitoring antennas at a predetermined distance from each other, and when a large number of monitored objects enter or leave the room in succession, the same object is detected between the two antennas. , It is difficult to determine whether each object enters or leaves the room. In addition, there is a case where the person turns back after entering the room or a case where the person turns back after leaving the room. Therefore, these must be excluded from entry and exit. If the distance between the two antennas is increased to avoid such a situation, the monitoring time for movement between the antennas is increased, the monitoring area is enlarged, and the passage route is complicated. In addition, the number of antennas increases, an unmonitored area is formed, and the stagnation of the monitoring target between the two antennas poses a problem. The purpose of this invention is
In order to solve such problems of the prior art,
It is an object of the present invention to provide a moving object detection device capable of recognizing a target of a moving object and a moving direction thereof on a monitoring device provided in a monitoring area.

[0009]

SUMMARY OF THE INVENTION A feature of a moving object detecting apparatus according to the present invention for achieving the above object is that the first and second moving object detecting devices which are arranged at a predetermined distance from each other in and out of a predetermined area and detect the moving object. A second sensor, storing the identification information in accordance with each of the moving objects detected by receiving the identification information, and receiving at least one of the first information and the second information in the order in which they are received; A memory for storing three or more memories, a first time until the moving body passes through the second sensor when receiving the first detection signal from the first sensor, and generates first information. A first information storage means for storing the data in a memory, and a second time until the moving body passes through the first sensor when a second detection signal is received from the second sensor. Second information storage for generating the information of Means for lapse of either of the first time and the second time after the lapse of either of the first time and the second time or when one of the first time and the second time is not set Determining means for reading the first information and the second information stored in the memory after the reading and determining whether the moving object has entered or exited based on the arrangement state of the first information and the second information. The determination result by the determination means is sent to the data processing device.

According to a second aspect of the present invention, the first and second sensors are arranged at intervals of one person in the first and second order in the direction of entry and exit. The memory is divided into a first storage area and a second storage area in order to distinguish the next successive detection target from the return detection target when returning, and the first storage area has Three pieces of the first information and the second information are stored in the order in which the sensors detected them, and the same is received in the second storage area in the third storage area of the first storage area (received in the third detection). The information is stored, and the information received fourth (in the fourth detection) is stored next. This makes it possible to discriminate the next detection target or the return detection target based on the information array. In addition, in addition to the determination after the elapse of the time, the determination unit further stores the fourth information (received in the fourth detection) in the second storage area at a point in time after storing the information. Is determined based on the arrangement state of the first information and the second information stored in the memory.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a discriminating device (a reader or the like) is installed at an entrance, a gate is formed, and two sensors are added to the discriminating device. This gate has one person
It has a width that can be passed in a row, and the two sensors are arranged along the direction of passage at a distance of about the width of a human body. From the moving speed of the person with respect to the distance between the two sensors, a standard or average passing time indicating the moving speed of the individual passing between the sensors is determined in advance as the required time. The sensor number (sensor code) when the first sensor detects the passage of a person is recorded, and the next sensor is monitored by the time required for the person to actually pass between the sensors until the next sensor is detected. do. When the second sensor detects the passage of a person within the time, the sensor number (sensor code) is recorded as before. Further, in order to monitor the state of canceling and returning from the state of entry or exit of the person, the detection of the next sensor is monitored within the required time.

In this case, if the first detection sensor is still detecting after the lapse of the required time, a state in which a person stops, or a continuous entry and exit of the next person, that is, entry and exit is performed. . Therefore, it monitors again for the required time and waits for its movement. If none of the sensors has detected the required time, the moving direction of the moving body (transponder) is determined based on the order of the recorded sensor numbers. The information of the date and time is added to this determination result, the identification codes of one or a plurality of individuals received via the antenna are combined into one piece of information, and the data is transferred to the host (data collection device). In this way, it is possible to grasp the moving direction of the individual at the time of passing through the entrance, including the return state of the moving body.

Here, in the determination of the moving direction of the individual, the arrangement state of three or more pieces of first information and second information is stored as in the above-described configuration. In this way, it is possible to judge from entry (entrance) to exit (exit), cancellation of entry, and cancellation of exit. That is,
The determination of entry or exit is made up of two arrays of the first information and the second information. In the case of returning after entering a room or returning after exiting, whether only one piece of the first information or the second information is present. , The first information and the second information, which can be distinguished from the previous two information arrays. Therefore, three pieces of first information and second information are sequentially stored, and a determination is made based on the arrangement state. However, when there is continuous entry or continuous exit, it is not possible to distinguish between continuous entry, continuous exit and the previous return state in the three arrays of the first information and the second information. That is, there are two cases of the third detection, that is, detection of return when returning and detection of the next target. However, when the number of entering and exiting is small, the number of returns is also small. Therefore, if the detection of three detections is processed as being indistinguishable, there is often no practical problem.

If it is necessary to detect the continuous state of the moving object, it is necessary to distinguish between the next detection target of continuous entry and continuous exit and the detection target of return when returning. For this purpose, as in the configuration of the second invention, a third detection target is stored in the second storage area, and this is set as the next first detection target. Can be determined based on the relationship between the object to be detected and the fourth information detected and stored next. This distinguishes the returning return from the next entry (exit). Under such a condition, the return is made (canceled). In the case of return, there is no fourth detection. This is because there is no storage of the fourth information. The above description has been made with respect to entry and exit of a person, but the same applies to entry and exit of articles.

In the following embodiment, the first information storage means is realized by a first sensor interrupt program executed by the MPU, and the second information storage means is realized by a second sensor interrupt program executed by the MPU. It is realized by the embedded program. Also,
The determination means is realized by a determination processing program executed by the MPU, and determines a condition under which the determination means operates, after the first time and the second time have elapsed, or after the first time and the second time The condition that, when one of the times is not set, after the other set time has elapsed, is realized by the time monitoring program and the intermittent timer. In the embodiment, the first and second sensors each include an infrared light emitting element and a light receiving element that receives the light, and the identification information is received as an identification code from a transponder by a radio signal obtained from an antenna.
In the embodiment, the first information and the second information are flag codes, the former being "01" and the latter being "10". In the embodiment, as a memory for storing such information, a detection state register is specially prepared separately from the memory for storing identification information.

[0016]

FIG. 1 is a block diagram of a mobile monitoring system according to an embodiment of the present invention. 1, two readers 2a and 2b are provided in place of the reader 2 in FIG. The configuration of each of the readers 2a and 2b is the same as that of the reader 2. A monitoring terminal 10 receives the identification codes sent from the readers 2a and 2b. The readers 2a and 2b respectively include transmitting and receiving antennas 21a and 21b.
The transmission wave is transmitted to the moving bodies 40 and 50 to which the transponders 4 and 5 have been added via the. Its transmission frequency is 130
It is an FM wave of about kHz and the output is about several tens mW. As a result, the range in which the mobile units 40 and 50 (the transponders 4 and 5) can receive and transmit the data is a radius of 1 m
To several meters. Here, in order to surely monitor the target, the two transmitting and receiving antennas 21a and 21b receive the same target. Moreover, if the signal is received even once by any of the antennas as described later, it means that the target (moving object) has been detected. That is, the monitoring area here is a range in which the transmitting and receiving antennas 21a and 21b are received by either of them.

The moving bodies 40 and 50 (transponders 4 and 4)
5), when the FM wave is received, the
Modulating circuits 40a and 50a comprising mixers and the like for modulating according to the identification code stored in M and the like, identification code storage ROMs 40b and 50b, and power supply circuits 40c and 50
c. The power supply circuits 40c and 50c are circuits that rectify a burst signal transmitted from the monitoring terminal 10, charge a capacitor, and supply power from the capacitor to each of the circuits. Since the readers 2a and 2b are of two systems, the monitoring terminal 10 receives the RS232C reception interface (reception IF) 11 connected to the bus 16.
a and 11b. In addition, the monitoring terminal 10
PU (microprocessor) 12, memory 13, timer 14, first intermittent timer 14a, second intermittent timer 14
b, the communication interface 15 is mutually connected via the bus 16.

The receiving interfaces 11a and 11b convert the identification codes sent from the readers 2a and 2b via the RS-232C line into serial-parallel signals and receive them, generate an interrupt signal, and notify the MPU 12 of the incoming call. MP
U12 reads the data of the reception interfaces 11a and 11b by this reception interrupt processing and the like, obtains the date and time at that time by referring to the timer 14, and stores the date and time and the movement direction such as entry and exit described later in the received identification code. Message information to which the result of the determination is added and sent to the host 3 via the communication interface 15 and the line 6.

Reference numeral 26a denotes an infrared light emitting element;
Is the light receiving element. These constitute a first sensor 26 provided at the gate 28 first in the entering direction. 27a is also an infrared light emitting element, and 27b is its light receiving element. These constitute a second sensor 27 provided next to the first sensor 26 in the direction in which the gate 28 enters. The gate 28 is of a width that allows a person to pass in a row, and
The interval between the second sensors 26 and 27 is set substantially for one person and one person. The light emitting elements 26a and 27a are respectively driven by a drive circuit 29a, and detection signals of the light receiving elements 26b and 27b are sent to a signal interface (signal IF) 11c via the detection circuit 29b. The drive circuit 29a is controlled by the MPU 12 via the signal IF. The MPU 12 receives a detection signal from the first sensor 26 and the second sensor 27 as an interrupt signal via the interface 11c, and receives the detection signal as a first signal.
The first sensor interrupt program 13
2 is executed, and when the received detection signal is the second sensor 27, the second sensor interrupt program 133 is executed.

Reference numeral 137 denotes a detection status register which stores detection signals from the first sensor 26 and the second sensor 27 as flags, and is provided as a part of the memory 13. As shown in FIG. 5A, the detection status register 137 includes a first storage column 137a and a second storage column 137b, and the first storage column 137a includes the first and second storage columns 137a and 137b.
There are provided storage positions F1, F2, and F3 where three flag codes of the first, second, and third times are sequentially stored in response to the detection of the third and third times, and the second storage field 137b is provided in the second storage column 137b. , The third, the fourth, and the fifth detection
There are provided storage positions F4, F5, and F6 in which the third, fourth, and fifth flag codes are sequentially stored. In the following description, a special process is performed for the fifth detection, so that the position of F6 is unnecessary. However, in order to confirm that the detection is the fifth detection, the first storage field 13 is used.
7a and the second storage section 137b have the same configuration in order to use them alternately. On the other hand, a transmission management table 138 sequentially stores the received identification code and the reception time corresponding to the code.

The first intermittent timer 14a is connected to the first sensor 2
The distance from 6 to the second sensor 27 is set to the average time IT1 when the moving body moves, and after measuring this time, a timeout occurs. The second intermittent timer 14b
The distance from the second sensor 27 to the first sensor 26 is set to the average time IT2 when the moving body moves, and after measuring this time, a timeout occurs. These times may be equal, but are generally provided because the moving state of the moving body upon entry and the moving state of the moving body upon exit are different.

The identification code receiving program 130 receives the identification code data after the parallel conversion one byte at a time from the reader 2a or 2b, and temporarily stores the data in a predetermined buffer area of the memory 13 sequentially. Then, a reset signal is sent to the reader 2a or the reader 2b that has received the identification code. When a reception interrupt occurs during the processing of this program and the processing of another program, this program accepts the interrupt processing, stores the received identification code in the buffer area, and then enters the interrupt processing. Then, when the interrupt processing is completed, the detection time acquisition program 131 is started. Thereby, the detection time is acquired, and the received identification code and time are registered in the transmission management table 138. The transmission management table 13
8 is not recorded in the transmission management table 138 when the same identification code is recorded in the transmission management table 138.

Therefore, when the identification code is detected once by either the reader 2a or the reader 2b with reference to the buffer area, the identification code of the moving object is stored in the buffer area. In the above case, the detection may be performed once when the same moving body is detected in the reader 2a and the reader 2b. In this case,
When each reception buffer area is divided and the same identification code is stored in both buffers with reference to each other, one moving object is detected by a logical product of the detections. This is to surely detect that the moving object has entered the monitoring area, thereby eliminating erroneous detection due to noise or the like. In this case, the monitoring area is not a range where the transmitting and receiving antennas 21a and 21b are received by either of them, but a range where the transmitting and receiving antennas 21a and 21b receive the same. Further, the identification codes may be sequentially stored in the reception buffer area with a certain monitoring time provided, and the processing of one identification code may be performed when the same identification code is detected twice or more within the certain monitoring time. This can prevent erroneous detection due to noise or the like.

The detection time acquisition program 131 obtains the date and time at that time by referring to the timer 14, and temporarily stores it as a current date and time in a predetermined area (for example, a time variable) of the memory 13. Thereafter, the MPU 12 executes the identification code receiving program 130 to read the time data, and the time data is stored in the identification code receiving program 130.
Is written into the transmission management table 138 together with the identification code detected by the execution of First sensor interrupt program 1 executed when receiving a detection signal of first sensor 26
32 activates the first intermittent timer 14 a and stores the flag code corresponding to the detection signal of the first sensor 26 in the detection state register 137. Here, the flag code is “01”. The second sensor interrupt program 133 executed when the detection signal of the second sensor 26 is received includes:
Activate the second intermittent timer 14b and set the detection state register 13
7, a flag code corresponding to the detection signal of the second sensor 27 is stored. Here, the flag code is set to “10”.

First and second sensor interrupt programs 13
The flag codes 2 and 133 are stored with reference to the flag storage positions F1 to F6 of the detection status register 137, respectively. That is, when the flag code is already stored, the flag code is stored at the next position, and when there is no flag stored in the storage position sequentially from the first storage position, the flag code is stored at a position not stored. Further, the third detection in the first storage section 137a is performed by the third detection.
When the flag is stored in the second position F3, the same flag is stored in the first position F4 of the second storage field 137b. FIG. 2 is an example of the first sensor interrupt program 132 that performs such processing. This is started by interruption of the detection signal of the first sensor, the first intermittent timer 14a is started (step 101), and the first detection flag F1 is set to "1" with reference to the column of the first storage column 137a. 0 "(whether there is no detection flag) or not (step 102).
If YES, the flag code "01" is stored in the position F1 and the process ends (step 102a). If NO, it is determined whether the second detection flag F2 is "0" (step 103). If YES, the flag code "01" is stored at the position F2, and the process ends (step 103a).

If the result of the determination is NO, it is determined whether the third detection flag F3 is "0" (step 1).
04). If YES, the flag code "01" is stored in the position F3 (step 104a), and the storage position F of the first detection flag in the second storage column 137b is further stored.
Then, the flag code "01" is stored in No. 4 and the process is terminated (step 104b). The above is the basic processing of the first sensor interrupt program 132. Step 10
The first intermittent timer 14a is activated by the first intermittent timer 1
When 4a is running, it is restarted, and counting of time is started again from the time of this restart. The flag code stored in this manner is referred to when the time monitoring program 134 starts the entry / exit determination processing program 135 after the first intermittent timer 14a times out.

Here, the following steps are added in addition to the above basic processing. That is, when the determination in step 104 is NO, it is determined whether the second detection flag in the column of the second storage column 137b is "0" (step 105). If YES, the flag code "01" is stored at the position F5 (step 106), and the process enters the determination process for executing the determination process program 135. Then, the identification code transmission program 136 is activated after the determination, and a process of transmitting the identification code including the determination result is performed (step 107). Note that this corresponds to the process from step 407 to step 406 in the process of FIG. Thus, the arrangement of the flag coat can be started without waiting for the timeout of the intermittent timer 14a. This is because if two flag codes are stored in the column of the second storage column 137b, it is possible to determine “entry” and “leave”. If the determination in step 105 is NO, the process ends.

Second sensor interrupt program 1 shown in FIG.
The way of storing the flag code of 33 is the same as that of the processing of FIG. 2, and the activation of the first intermittent timer 14a in step 101 is replaced by the second intermittent timer 14b (step 201), and the stored flag code is changed from "01". It merely replaces "10" according to the detection signal of the second sensor 27. Each step in FIG. 3 is represented by step 2 ○, and the process represented by the lower two digits corresponds to the process represented by the lower two digits of step 1 の in FIG. 2. Therefore, the explanation is omitted. The first and second sensors 2 are stored in the detection state register 137 by the processing programs of FIGS.
Flag codes corresponding to these detection signals are sequentially stored in the order in which the detection signals are generated. With this arrangement, entry and exit can be determined by a determination processing program 135 described later.

The time monitoring program 134 is started by a time-out interruption of the first intermittent timer 14a and the second intermittent timer 14b, and is a program 1 for judging entry and exit.
35 is started. The time value IT1 counted by the first intermittent timer 14a is a time from when the first sensor 26 detects the moving object to after the first sensor 26 passes through the second sensor 27,
This is an average passing time until immediately after the second sensor 27 detects the moving object. The time value IT2 counted by the second intermittent timer 14b is a time from when the second sensor 27 detects the moving body to after the second sensor 27 passes through the first sensor 26. This is the average transit time immediately after the detection of the moving object.

FIG. 4 shows an example of this. When the first intermittent timer 14a times out, in step 301, a register for storing an interrupt signal of the interface 11c is referred to. This register includes, for example, the first sensor 2
6, "1" is set at the rise of the detection signal of the second sensor 27, and reset to "0" at the fall. Therefore, once the detection signal has been completed, it should have been reset. Note that an interrupt occurs at the timing when "1" is set in this register. Therefore,
By referring to the value of the first sensor 26 set in this register, it can be determined whether or not the detection state is maintained.

It should be noted that the first and second moving speeds are smaller than the moving speed of the moving body.
Since the processing speed of the sensor interrupt programs 132 and 133 is much higher, once the detection signal falls, it is reset, and when it rises again, it is detected as another moving object by the sensor interrupt. Processing is performed. So if this is in a state that will not reset,
The detection state is maintained or the next detection is being performed. This is a point in time when the second sensor 27 is started from the viewpoint of the first sensor 26. That is, when the reference value of the first sensor 26 is not reset, the detection is being performed, and the YE
It becomes S. Therefore, in step 302, the first intermittent timer 1
4a is started and the process is terminated. When the next mobile unit is in the detection position, a new identification code is stored in the transmission management table 138 of the memory 13 by the identification code receiving program 130.

If NO in step 301, it is determined whether the second intermittent timer 14b is stopped (step 303). This is because, even when the first sensor 26 is not in the detection state, the flag code by the next detection is stored in the detection state register 137 when the second sensor 27 is performing the detection operation. . this is,
In particular, this is for the return of the moving object, and it is necessary to monitor the first sensor 26 again. When the moving body is moving from one side to the other, the gate 28 cannot allow another moving body to enter from the other side. Therefore,
Monitoring for intrusion from the opposite direction is unnecessary and can be ruled out. If the determination in step 303 is YES, the return monitoring of the moving object is also terminated, and the MPU 12 finally executes the determination processing program 135 to enter the entry / exit determination processing (step 304). This determination processing will be described later. On the other hand, if the determination in step 303 is NO, this process ends. In this case, when the second intermittent timer 14b described below times out, the entry / exit determination processing is called in step 38.

When the second intermittent timer 14b has timed out, the register of the interface 11c is referred to in step 305 as described above. By referring to the value of the second sensor 27 set in this register, it can be determined whether or not the detection state is maintained.
If this is not reset, the determination in step 305 is YES. Therefore, the second intermittent timer 14a is started in step 306, similarly to the previous step 302, and the process ends.

If the determination in step 305 is NO, it is determined whether the first intermittent timer 14a is stopped (step 307). This is, as mentioned above, the second
This is because there is a state where the second sensor 26 is performing a detection operation even when the sensor 27 is not in the detection state. That is, the first sensor 26 for returning is monitored by this operation. If the determination in step 307 is YES, the MPU 12 executes the determination processing program 135 to enter the entry / exit determination process (step 308). On the other hand, if the determination in step 307 is NO, this process ends. In this case, the first intermittent timer 14
When a times out, entry and exit determination processing is called in step 304.

FIGS. 5 to 9 show a judgment processing program 135.
It explains the contents of the judgment processing of the entry and the exit of. The determination processing program 135 basically refers to the flag data at the three positions F1 to F3 stored in the first storage field 137a of the detection status register 137, and when the value is “011000”, Since the memory is stored in the arrangement state by the detection of the first sensor and the second sensor in this order, it is determined that “entrance”. When the value is “100100”, the second sensor and the first sensor are detected. Since the information is stored in the arrangement state by the detection in the order, it is determined that “leaving” is performed. Therefore, the above-mentioned determination code is provided inside.
Then, the determination processing program 135 resets and clears the contents of the detection state register 137 immediately after obtaining the determination result. Second storage column 13 of detection status register 137
7b, the flag code is stored in the second storage section 13 without referring to the first storage section 137a.
With reference to F4 to F6 of 7b, it is determined whether to enter or leave in the same manner as described above. Other determinations are basically unnecessary. However, here, a return state due to entry cancellation in the middle and a return state due to exit cancellation in the middle are also determined. The judgment code “0” for that
"10000" (entrance canceled), "100000"
(Cancellation cancellation) is provided inside. And
These are also reported to the host 3 as determination results. Therefore, in such a case, the first storage column 13
7a and the second storage field 137b. This will be described below.

A description will be given of the case of single entry and exit shown in FIG. When a person moves toward the room 30 with respect to the gate 28 in the order of ABCD shown in FIG. 5B, this is entry. At this time, the flag data F1 in the first storage section 137a of the detection status register 137 is set.
F3 is “000000” at the position A. At the position B, the value is “010000”, and the first detection by the first sensor 26 is performed. At position C, "01100
0 "and the second detection by the second sensor 27. The monitoring time IT2 of the second intermittent timer 14b
The determination processing program 135 is called by the time monitoring program 134 at the timing of the position of approximately D where the processing has been completed. Then, F1 to F3 are referred to “01100
0 ”is determined to be“ entrance. ”A person moves from the room 30 toward the gate 28 and enters an ABC shown in FIG.
If you move in the order of -D, you are exited. At this time, the flag data F1 to F3 of the first storage section 137a are stored.
Is “000000” at the position of A. In the position of B, the value is “100000”, and 1
There is a second detection. At the position C, the value is “100100”, and the second detection by the first sensor 26 is performed. Then, the determination processing program 1 is executed at the timing of the position of approximately D.
35 is called and F1 to F3 are referred to "1001".
00 ”is determined to be“ leaving out ”.

FIG. 6 further shows a judgment processing program 135.
Is a return determination in the case of entry cancellation. A person moves toward the room 30 against the gate 28, FIG.
When moving in the order of ABC shown in (a), entry is canceled halfway. At this time, the flag data F1 to F3 in the first storage field 137a are “000000” at the position of A, but are “0” at the position of B.
10000 ", which is the first detection by the first sensor 26. There is no detection at the position C, and the value is" 01 ".
The determination processing program 135 is called almost at the timing of the position C, and it is determined that the entrance is canceled because the last state is “010000”. 6B, the ABCD-DE shown in FIG.
This is also when the entrance is canceled when moving in the order of. At this time, the flag data F1 to F3 of the detection state register 137 are “000000” at the position of A. At the position B, the value is “010000”, and the first detection by the first sensor 26 is performed. At position C, "01
1000 ", which is the second detection by the second sensor 27. Further, the third detection is by the first sensor 26. As a result, the flag data F1 to F3 of the first storage section 137a are set to" 011001 ″. At this time, the flag data F4 to F6 in the second storage section 137b are set.
Is referred to. In the second storage field 137b, the third flag code F3 of the first storage field 137a is stored in F4 as the first time, and the flag data F4 to F6 are stored.
Becomes “010000”. At about the timing of the position E, the determination processing program 135 is called and "010
000 "is determined as entry cancellation.

FIG. 7 further shows a judgment processing program 135.
Is a return determination when canceling the exit.
A person moves from the room 30 toward the gate 28, as shown in FIG.
When moving in the order of ABC shown in (a), the exit is canceled. At this time, the flag data F1 to F3 of the detection state register 137 are “000000” at the position of A. At position B, "1000
00 "and the first detection by the second sensor 27. There is no detection at the position C, and it is" 100000 ", and the value does not change. The determination processing program 135 calls at the timing of the position C. Last state "10
0000 "is referred to, and it is determined that the cancellation is canceled.
A person moves from the room 30 toward the gate 28, as shown in FIG.
This is also the case where the exit is canceled when moving in the order of ABCDE shown in (b). At this time, the flag data F1 to F3 of the detection state register 137 are A
Is "000000" at the position. At position B, "1
00000 "and the first detection by the second sensor 27. At the position C, it is" 100100 "and the second detection by the first sensor 26. Further, D
In the position, the third detection by the second sensor 27 is performed. Thus, the flag data F in the first storage section 137a is stored.
1 to F3 become “100110”. At this time,
At approximately the timing of the position E, the flag data F4 to F6 in the second storage field 137b are referred to. To this end, the third flag code in the first storage section 137a is stored as the first time, and the flag data is "100000". The determination processing program 135 is called almost at the timing of the position E, and the final state “100000”
Is determined to be a cancellation.

FIG. 8 further shows a judgment processing program 135.
Is a determination of continuous entry. Here, when a detection signal is received from one of the first and second sensors and this is the fifth storage in the detection state register 137, the flag data in the second storage column 137b is stored in the first storage column 137b. The flag data in the second storage section 137b is cleared by transferring the data to the storage section 137a. As a result, the state is returned to the second detection state, and the detected flag coat is stored as the third detection. Then, the next detection signal is stored in the second storage section 137b as the fourth detection. With this,
A determination can be made for a large number of consecutive entries. X,
When two persons Y move toward the room 30 and enter the gate 28 sequentially in the order of ABCEF shown in FIG. F3 is “000000” at the position of A. At the position B, the value is “010000”, and the first sensor 26 detects X (first time). At the position C, the value is "011000", and the second sensor 27 detects X (second time). Note that the first sensor 26 and the second
Since the interval between the sensors 27 is for one person, the detection of X precedes the detection of Y that follows. Therefore, at the position D, the first sensor 26 detects Y as the third detection. As a result, the flag data F1 to F3 in the first storage section 137a becomes “011001”. At this time,
The flag data in the second storage field 137b is “01000
At the position of E, the fourth detection is the detection of Y by the second sensor 27. At this time, the flag data in the second storage field 137b is "01100".
The determination processing program 135 is called at approximately the timing of the position F, and “011000” of the flag data F4 to F6 in the second storage field 137b is referred to, and is stored in the transmission management table 138 at this time. X and Y (identification codes of X and Y) are determined to be “entrance”.

Furthermore, if the first sensor 26 detects Z (Z is the third consecutive entry following Y) at the timing of the position E, this is the fifth detection. . At this time, the first sensor interrupt program 1
32 stores the flag data in F6 of the second storage field 137b, but in this case, the flag data F4 of the second storage field 137b is not stored in F6.
To F6 to the first storage section 137a to clear the flag data in the second storage section 137b. As a result, the flag data F1 to F3 become the same as the flag data at the position C in the second detection, and return to the detection state of the position C. Thereafter, the first sensor 2 is used as a flag coat for the fifth detection.
The detection of Z by 6 is stored in F4, and this is treated as the case of the third detection. Thereby, the second storage section 137b
The flag data F4 to F6 correspond to the detection of the position of D and enter the third detection state. And for Z, E
The fourth detection of Z by the second sensor 27 is performed at the position of. In this way, by transferring the contents of the second storage section 137b to the first storage section 137a, it is possible to cope with continuous entry by three or more people. In this case,
Since the first storage field 137a and the second storage field 137b can store the flag code under the same condition, the flag data F1 to F3 of the first storage field 137a are cleared while the second storage field 137b is left as it is. And the second storage section 137b
The first storage section 137a may be used as the third storage section following the above.

FIG. 9 further shows a judgment processing program 135.
Is a determination of continuous exit. In addition, similarly to the above,
When a detection signal is received from one of the first and second sensors, and this is the fifth storage in the detection state register 137, the flag data in the second storage column 137b is transferred to the first storage column 137a. To clear the flag data in the second storage section 137b. When two persons X and Y move from the room 30 toward the gate 28 in the order of ABCEF shown in FIG. F3 is “000000” at the position of A. In the position of B, "10000
0 ", indicating that the second sensor 27 has detected X (first time). At the position C, it is" 100100 ", and the first sensor 26 has detected X (second time). In the position of, the detection of Y by the second sensor 27 (3
Times). As a result, the flag data F1 to F3 in the first storage section 137a becomes “100110”. At this time, the flag data F4 to F6 in the second storage section 137b are stored.
Becomes “100,000”. At the position E, the first sensor 26 detects Y (fourth time). At this time, the flag data F4 to F6 in the second storage section 137b are stored.
Becomes “100100”. The determination processing program 135 is called substantially at the timing of the position F, and the flag data F4 to F6 in the second storage field 137b are set to "10010".
0 ”, and the X and Y 2 stored at this time are stored.
The person (the identification code of X and Y) is determined to be "leaving". In each of the above-described determinations, when a determination result is obtained, the determination processing program 135 executes the detection state register 1
The contents of 37 are cleared immediately thereafter.

Here, similarly to the case of the above-mentioned entrance, when the detection of Z by the second sensor 27 is performed for the fifth time at the timing of the position E, this is the fifth detection, and the second detection is performed.
Is transferred to the first storage section 137a to clear the flag data in the second storage section 137b. Thereby, the state is returned to the detection state of the position C, and then the fifth time Z
Is treated as the third detection. As a result, the third detection state at the position D is established. Then, at the position of E, there is the fourth detection of Z by the first sensor 26. In this way, it is possible to cope with the continuous leaving of three or more people. As described above, the determination processing program 13
5 is stored in the transmission management table 138 of the memory 13, and together with one or a plurality of identification codes received at that time, the identification code transmission program 1
36 to the host 3. Then, after this transmission, the contents of the transmission management table 138 are deleted, and the determination result is cleared. Identification code transmission program 136
Is formed as a telegram of the identification code detected with reference to the transmission management table 138, the information of the current date and time acquired by the detection time acquisition program 131, and the RS -2
Processing for transmitting to the host 3 is performed according to 32C.

Next, the operation from reception of the identification code to transmission thereof will be described in accordance with the overall processing flow shown in FIG. First, a moving body 40 with a transponder attached
Has entered a monitoring area where both the transmitting and receiving antennas 21a and 21b receive. The readers 2a and 2b transmit radio waves to the mobile unit 40, and the readers 2a and 2b detect radio waves emitted from the mobile unit 40 and transmit identification codes to the monitoring terminal 10, respectively. In FIG. 10, each time these identification codes are transmitted, the MPU 12 starts the reception interrupt and causes the MPU 12 to execute the identification code reception program 13.
0, the received identification code is fetched, the identification code is temporarily stored in the buffer area, and the moving object is detected (step 401). By the detection processing of the moving body, the identification code of the moving body 40, for example, "
XX0010 "is stored in the buffer area.
The detection time acquisition program 131 is called and the MPU 1
2 and the timer 14 is referred to. The obtained time is stored in the temporary memory as information on the current date and time (step 402).

Referring to the transmission management table 138, it is determined whether the same identification code has already been received.
It is determined whether or not the received identification code is present (step 4).
03), when the identification code is not registered (in the case of NO), the identification code is registered in the transmission management table 138 as the detected identification code for this identification code, and the time at which the temporary storage is performed is stored in the transmission management table 138. It is registered in the reception time column at the back (step 404). At this time, the identification code and the time temporarily stored in the buffer area are cleared. Next, it is determined whether or not there is a determination result by the determination processing program 135 with reference to the determination result storage column of the transmission management table 138 or the determination result storage area of the memory 13. If the determination is NO, this process ends (step 405).

If the determination in step 405 is YES, the identification code transmission program 136 is started, and the identification code detected, information on the detected date and time, and the determination result are formed as a message to the host 3 side. It is sent (step 406). Then, the contents of the storage area of the determination result in the memory 13 and the contents of the transmission management table 138 are cleared. On the other hand, if the determination in step 403 is YES, the process ends because the identification code has already been stored. Step 405
Between the steps 406 and 406, the identification code transmission program 136 is activated by the end of the determination by the determination processing program 135 in step 407, and the process enters (step 406).

As described above, in the embodiment, the first storage column and the second storage column are provided in the detection status register in order to distinguish between the entry of the next detection target and the return of the entered detection target. Thus, at the time of the fifth detection, the flag data in the second storage column is transferred to the first storage column.
The flag data in the second storage column is left as it is without being transferred, the first storage column is treated as the second storage column, and the information detected next is cleared in the first storage column and stored here. The first storage section and the second storage section may be used alternately. In the embodiments, entry and exit are mainly described. However, it goes without saying that the present invention can be applied to entry and exit of articles.

[0047]

As described above, according to the present invention, it is possible to obtain information indicating in which direction a moving body (person, article) has moved through a gate, and receive the information together with the identification information of the transponder. Depending on the entry and exit management of people, or
The entry / exit management of goods can be reliably detected by the monitoring device (gate side). As a result, it is possible to reduce the processing load of entry / exit management on the host computer (the processing device side for collecting data).

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile monitoring system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an interrupt processing program that stores a flag code by the first sensor.

FIG. 3 is an explanatory diagram of an interrupt processing program for storing a flag code by the second sensor.

FIG. 4 is an explanatory diagram of a time monitoring processing program.

FIGS. 5A and 5B are explanatory diagrams of the relationship between entry and exit flag codes. FIG. 5A is an explanatory diagram of a detection state register that stores a flag coat, and FIG. (C) is an explanatory diagram of an arrangement of flag coats in the case of leaving only one person.

FIGS. 6A and 6B are explanatory diagrams of an arrangement state of an entry cancellation return flag code, in which FIG. 6A shows a case of entry cancellation by a first sensor, and FIG. This is the case of entry cancellation.

FIGS. 7A and 7B are explanatory diagrams of an arrangement state of a flag code of exit cancellation return, wherein FIG. 7A shows a case of exit cancellation by a second sensor, and FIG. This is the case of cancellation of exit.

FIG. 8 is an explanatory diagram of an arrangement state of flag codes for continuous entry.

FIG. 9 is an explanatory diagram of an arrangement state of flag codes for continuous exit.

FIG. 10 is an explanatory diagram of an overall processing flow from reception to transmission of an identification code.

FIG. 11 is a block diagram of a conventional mobile monitoring system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Monitoring system, 2, 2a, 2b ... Reader, 3 ... Host computer (host), 4, 5 ... Transponder,
6 RS-232C interface line, 10 monitoring terminal, 11a, 11b receiving interface, 12 MP
U (microprocessor), 13: memory, 14: timer, 15: communication interface, 16: bus, 14a ...
1st intermittent timer, 14b ... second intermittent timer, 26 ... first
, 27 ... second sensor, 28 ... gate, 30 ...
Room, 130: identification code receiving program, 131: detection time acquisition program, 132: first sensor interrupt program, 133: second sensor interrupt program, 134
... time monitoring program, 135 ... determination processing program,
136: identification code transmission program, 137: detection status register, 138: transmission management table.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI G08G 1/017 G01V 3/00 E (72) Inventor Toshihisa Ishii 1 Horiyamashita, Hadano-shi, Kanagawa Prefecture Hitachi Computer Electronics Co., Ltd. (72 1) Inventor Jin Tsuge 1 Horiyamashita, Hadano-shi, Kanagawa Hitachi Computer Electronics Co., Ltd. (56) References JP-A-6-274768 (JP, A) JP-A 1-260595 (JP, A) JP-A 63 -144222 (JP, A) Special Table 57-501253 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08B 13/24 G07C 9/00 H04B 1/59 H04B 5/00 G01V 15/00 G08G 1/017

Claims (3)

(57) [Claims] 1. A mobile object within a predetermined area receives identification information sent from the mobile object, detects the mobile object, and sends the identification information and the like of the mobile object to a data processing device. In a moving object detection device for transferring, a first and a second sensor which are arranged at a predetermined distance in an entering and exiting direction of the predetermined area to detect the moving object, and the movement detected by receiving the identification information. A memory for storing the identification information in accordance with each of the bodies and storing at least three or more of the first information and the second information in the order in which the first information and the second information are received; First information storage means for setting a first time until the moving body passes through the second sensor when receiving the detection signal, generating the first information and storing the first information in the memory; The second When a second detection signal is received from a sensor, a second time until the moving body passes through the first sensor is set, and the second information is generated and stored in the memory. Information storage means, and either one of the first time and the second time is set after one of the first time and the second time has elapsed, or when one of the first time and the second time is not set Determining means for reading out the first information and the second information stored in the memory after the elapse of the time and determining whether the moving object has entered or exited based on an arrangement state of the first information and the second information, A moving object detecting device for transmitting identification information of a moving object and a result of the judgment by the judging means to the data processing device. 2. The sensor according to claim 1, wherein the first and second sensors are arranged at intervals of one person in a first and a second order in the direction of entry and exit. A first storage area for storing three pieces of the first information and the second information in the order in which the first information and the second information are received in response to the first to third detections; A second storage area for storing any one of the first information and the second information and for storing the information received by the fourth detection next to the second information; Storing the information received for the fourth time in the second storage area, reading the first information and the second information stored in the memory, and judging the entry / exit of the moving body based on the arrangement state thereof The first memory area To when the two information are stored, the first information, it is determined that enters when the order in which the sequence of the second information, the second information, the first
When the two pieces of information stored in the second storage area are determined to be output when the three pieces of information are stored in the first storage area, the two pieces of information are stored in the first storage area. The first information is determined to enter when arranged in the order of the second information, the second information is determined to be out when arranged in the order of the first information, 2. The moving object detection device according to claim 1, wherein the first information and the second information stored in the memory are deleted after the determination. 3. The first information storage means receives a detection signal from the first sensor, and stores the first information in the memory at a fifth detection position. Is transferred to the first storage area and the information of the second storage area is cleared,
The state is returned to the third detection state, the fifth detection is stored in the memory as the third detection, and the second information storage means receives a detection signal from the second sensor and sends the detection signal to the memory. When the storage of the second information reaches the fifth detection position, the data of the second storage area is transferred to the first storage area to clear the information of the second storage area for the second detection. 3. The moving object detection device according to claim 2, wherein the detection state is returned to the detection state, and the fifth detection is stored in the memory as the third detection.