JP4706914B2 - Goods management system - Google Patents

Description

  The present invention relates to an article management system for managing articles to be managed using a wireless tag.

  Various remote monitoring systems and monitoring systems have been proposed for the purpose of saving labor and improving security. On the other hand, an RFID (Radio Frequency Identification) system that reads / writes information in a non-contact manner between a small wireless tag and a reader (reading device) / writer (writing device) is known. The wireless tag includes an IC circuit unit that stores predetermined wireless tag information and an antenna that is connected to the IC circuit unit and transmits / receives information. The wireless tag information (identification) of the IC circuit unit is identified from the reader / writer side. Information) and the wireless tag can be identified.

  Conventionally, an article search system using an identification function by wireless communication using such a wireless tag is known (see, for example, Patent Document 1).

  In this prior art, when an operator inputs (for example, by voice) information on an article to be searched, identification information of a wireless tag corresponding to the article is searched from a database and is sent to the CPU of a self-propelled searching device. Entered. After that, while the search device runs in a predetermined search area, the reader provided in the search device reads the RFID tags in the reading range one after another, and the RFID circuit element that matches the identification information input to the CPU If found, the search result is displayed to the operator by displaying the position information of the article on the display means provided in the search device.

JP 2005-56177 A

  2. Description of the Related Art In recent years, there is a need to improve security in a monitoring system that remotely monitors each part in a distribution warehouse and other buildings by managing the movement of articles in and moving within a predetermined area. Although the above-mentioned prior art can perform a search while the reader is mounted on a self-propelled search device, the search is limited to detecting the position of an article as a stationary object. It was difficult to deal with.

  An object of the present invention is to provide an article management system capable of improving security by performing article management based on the movement state of articles to be managed.

In order to achieve the above object, the first invention provides an article movement detection means for detecting movement of an article wireless tag handled in association with an article to be managed via wireless communication, and security information collection for an administrator or A security device that notifies security information to an administrator; and a security control unit that activates the security device based on a detection result of the product movement detection unit, wherein the product movement detection unit includes the wireless tag for the product. The distance detection means repeatedly detects the distance, the direction, or the distance and the direction at predetermined time intervals, and the article movement detection means includes the distance detection means. And a determination means for determining a moving state of the article wireless tag according to a difference between a previous detection result and a current detection result .

In the first invention of this application, when the article to be managed is moved, the movement of the article wireless tag associated with the article to be managed is detected by the article movement detecting means, and the security control means is the security device based on the detection result. Is activated, and security information collection and notification such as imaging and voice / optical notification are performed. In this way, it is possible to improve security in article management by detecting the movement state rather than mere article arrangement information and operating the security device based on the detected movement state.
Further, by detecting the distance to the article wireless tag by the distance detection means, it is possible to detect the movement of the article to be managed by the change in the distance.
In addition, the determination means determines the movement state of the article wireless tag according to the previous and current detection results of distance, direction, or distance / direction detection, so that the management target between the previous detection time and the current detection time is determined. The movement of the article can be reliably detected.
In order to achieve the above object, the second invention provides an article movement detection means for detecting movement of an article wireless tag handled in association with an article to be managed via wireless communication, and security information collection for an administrator or A security device that notifies security information to an administrator; and a security control unit that activates the security device based on a detection result of the product movement detection unit, wherein the product movement detection unit includes the wireless tag for the product. Direction detecting means for detecting the direction of the object, wherein the direction detecting means repeatedly detects the distance, the direction, or the distance and direction at predetermined time intervals, and the article movement detecting means is the direction detecting means. And a determination means for determining a moving state of the article wireless tag according to a difference between a previous detection result and a current detection result.
By detecting the direction of the article wireless tag by the direction detection means, the movement of the article to be managed can be detected by the change in the direction.
In order to achieve the above object, the third invention provides an article movement detection means for detecting movement of an article wireless tag handled in association with an article to be managed through wireless communication, and security information collection for an administrator or A security device that notifies security information to an administrator; and a security control unit that activates the security device based on a detection result of the product movement detection unit, wherein the product movement detection unit includes the wireless tag for the product. A distance / direction detecting means for detecting the distance and direction of the article, and the distance / direction detecting means repeatedly detects the distance, the direction, or the distance and direction at predetermined time intervals, and detects the movement of the article. Comprises determination means for determining the movement state of the article wireless tag according to the difference between the previous detection result and the current detection result by the distance / direction detection means.
For example, it may be difficult to detect movement around the circumference of the antenna with the distance detection means alone, and it may be difficult to detect movement in a direction closer to the antenna with only the direction detection means. However, in the third invention of the present application, by detecting both the distance and the direction by the distance / direction detecting means, the movement can be reliably detected in any of the above cases.

According to a fourth invention, in any one of the first to third inventions, the article movement detection means includes a radio communication antenna, and a communication means for performing radio information communication with the article radio tag via the antenna. And directivity control means for changing the directivity direction of the antenna.

  The communication means communicates with the wireless tag for goods while changing the directivity direction of the antenna by the directivity control means, so that the movement of the managed article can be reliably detected. In addition, this makes it possible to detect the movement behavior of the article to be managed in a relatively wide range with one antenna, and also has an effect of reducing the number of installed antennas.

In a fifth aspect of the present invention based on any one of the first to third aspects , the determination means is the previous detection result and the current detection result by the distance detection means, the direction detection means, or the distance / direction detection means. It is determined that the article wireless tag has moved when the difference between the two becomes a predetermined value or more.

  Accordingly, it is possible to avoid detection of a subtle positional shift due to vibration of the management target article or misdetection due to a measurement error, and reliably detect only the movement of the management target article that is originally desired to be detected.

According to a sixth invention, in any one of the first to fifth inventions , there is provided a target person detection means for detecting that a target person wireless tag associated with a management target person is located within a communication range. .

  As a result, it is possible to comprehensively manage the articles in consideration of not only the movement behavior of the articles to be managed but also the position behavior of the person to be managed, and the security can be improved more reliably.

A seventh invention is the operation of the security device according to the sixth invention , when the subject detection means detects the subject RFID tag corresponding to the specific subject to be managed, which is registered in advance. It has the suppression control means which suppresses.

  Accordingly, for example, the security device can be prevented from operating exceptionally for a specific management target person such as a maintenance person or an administrator, so that convenience can be further improved.

An eighth invention is characterized in that, in the sixth or seventh invention , the security device is an imaging means for imaging in a predetermined direction as the security information.

  Thereby, when some unclear situation arises in article management, etc., security can be further improved by imaging a predetermined location as needed.

According to a ninth invention, in the eighth invention , there is provided an intruder detection means for detecting an intruder in a management target area according to the detection result of the article movement detection means and the detection result of the target person detection means. Features.

  By detecting an intruder according to the article movement detection and the target person detection result, the security security can be further improved.

According to a tenth aspect, in the ninth aspect , the security control means operates the imaging means when the intruder detection means detects the intruder.

  Thereby, the figure of the intruder, the outer shape of the corresponding article, etc. can be reliably imaged in the form of an image, and security security can be improved reliably.

According to an eleventh aspect of the present invention, in any one of the eighth to tenth aspects, the imaging unit is provided in a plurality so as to capture a plurality of locations in the management target area, and the security control unit includes the plurality of imaging units. Among the means, there is provided an imaging selection instruction means for selecting and operating a predetermined one corresponding to the position of the subject wireless tag detected by the subject detection means.

  By causing the imaging selection instruction means to perform imaging from the imaging means closest to the subject, for example, a clear video can be recorded reliably.

In a twelfth aspect of the invention according to any one of the eighth to tenth aspects of the invention, the imaging unit is provided in a plurality so as to capture a plurality of locations in the management target area, and the security control unit includes the plurality of imaging units. All imaging instruction means for operating all of the means are provided.

  This makes it possible to record video information over a wide range with all the imaging means when a wide search is to be performed, such as when the location of an intruder, management subject, or managed article is unknown.

According to a thirteenth aspect of the present invention, in any one of the eighth to twelfth aspects, the zooming / focusing control means for performing the scaling control or the focal position control of the imaging means in accordance with the distance to the subject wireless tag It is characterized by having.

  As a result, it is possible to record the management target person and the video in the vicinity thereof more clearly and clearly.

According to a fourteenth aspect of the present invention, in any one of the first to thirteenth aspects, the security device includes a notification unit that notifies the manager of the security information using a voice or an optical unit.

  Thereby, when some unclear situation arises in article management, etc., security can be further improved by performing voice alerting or optical alerting as needed.

  According to the present invention, since the article management is performed based on the movement state of the article to be managed, security can be improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view illustrating an example in which the article management system 100 according to the present embodiment is applied to a warehouse 300 that stores a large number of articles to be managed. In this example, the floor surface shape in the warehouse 300 that is the management target area is a rectangular shape as seen in the plan view, and the monitoring room 305 (one corner or neighborhood of the warehouse 300) on which the administrator stands by is shown. A separate room or a remote place that is relatively far away). In this example, the management target article 302 and a predetermined management target person 303 (for example, the management company employee and the article of the warehouse 300 are put in and out of the warehouse 300 in advance as monitoring targets. (Distributor employee, etc.) is set, and the RFID tag Tb for goods is attached (included) to the management target article 302, and the management target person 303 (omitted as a target person in the figure) has the RFID tag Tt for the target person. I have it.

  The article management system 100 according to the present embodiment includes a reader (article movement detection means, target person detection means) 101 installed at a predetermined location in the warehouse 300 (in this example, the center of the wall surface located below in the drawing). , A camera device (security device, imaging means) 102 installed in the four corners of the warehouse 300, and a management device installed in the monitoring room 305 and connected to the reader 101 and the camera device 102 via a communication network NW. And a server (security control means) 103.

  The reader 101 can search each wireless tag Tb, Tt existing in the warehouse 300 to detect each identification information or detect each existing position (details will be described later). In addition, each camera device 102 is installed with the lens unit facing the center of the warehouse 300, and when the field of view of all the camera devices 102 is matched, almost the entire space in the warehouse 300 can be seen.

  Then, the management server 103 causes the reader 101 to perform monitoring by detecting the presence positions of the wireless tags Tb and Tt and detecting the identification information every predetermined time. If the monitoring result does not satisfy the predetermined condition, the management server 103 Imaging of the warehouse 300 by the apparatus 102 and audio notification by a buzzer (security device, notification means; details will be described later) 104 provided in the management server 103 are made to the administrator of the monitoring room 305 to secure the article 302 to be managed. This is a notification of an abnormal state.

  FIG. 2 is a system configuration diagram illustrating an outline of the article management system 100 of the present embodiment.

  In FIG. 2, the article management system 100 includes a reader 101 for detecting identification information and detecting a location by wireless communication with the wireless tags Tb and Tt as described above, and a warehouse as a management target area. The camera device 102 disposed at a plurality of appropriate locations (four locations in this example) so that the space in the space 300 can be imaged, and the management server 103 connected to the reader 101 and the camera device 102 via an appropriate communication network NW. It consists of and. A control signal from the management server 103 is output to the reader 101 and each camera device 102 via the communication network NW, and detection results and detection results from the reader 101 and captured images from each camera device 102 are output to the management server 103. The

  The reader 101 includes a control unit 2 and an antenna unit (antenna) 3. The control unit 2 includes a central processing unit (CPU) 4, a network communication control unit 5 that controls transmission / reception of control signals and information signals to / from the management server 103 via the communication network NW, and a RAM, a ROM, and the like, for example. And an RF communication control unit 7 that controls wireless communication with the wireless tags Tb and Tt via the antenna unit 3 (the wireless tags Tb and Tt will be described in detail later).

  Each camera apparatus 102 includes a lens unit 8 that captures a predetermined direction, and known control means (not shown) that performs zooming control (zooming) and focus position control (focus adjustment) of the lens of the lens unit 8. I have. Then, when the control signal is input from the management server 103 via the communication network NW, the zooming control and the focal position control are performed, and the still image captured from the lens unit 8 is output to the management server 103.

  The management server 103 includes a CPU (Central Processing Unit) 9, a memory 10 including, for example, a RAM and a ROM, an operation unit 11 for inputting instructions and information from an administrator, and a display unit for displaying various information and messages. 12, a tag information database 13 comprising a large-capacity storage device such as a hard disk device and storing various tag information relating to the respective radio tags Tb, Tt corresponding to tag IDs (identification information) of the radio tags Tb, Tt described later, Network communication control unit 14 that controls transmission / reception of control signals and information signals with the reader 101 and each camera device 102 via the communication network NW, and management when an abnormality in the security state of the management target article 302 is detected. Buzzer 104 for voice notification to a person. The tag information database 13 is not limited to being provided in the management server 103, and an external database connected so as to be able to send and receive information via some kind of communication line may be used.

  In the present embodiment, a wired network using a cable or the like is assumed for the communication network NW. However, the present invention is not limited to this. For example, a wireless network having a frequency band and transmission / reception method different from that of the RF communication control unit 7 is used. Also good.

  FIG. 3 shows a functional configuration of the RFID circuit element To provided in common with the RFID tags Tb and Tt attached to and possessed by the management target article, the management subject, and the like that are the search target of the reader 101. It is a block diagram showing an example.

  In FIG. 3, the RFID circuit element To includes an antenna 151 that performs non-contact signal transmission and reception with the antenna unit 3 of the reader 101 using a high frequency such as a UHF band, and an IC circuit unit 150 that is connected to the antenna 151. have.

  The IC circuit unit 150 includes a rectifying unit 152 that rectifies the carrier wave received by the antenna 151, a power source unit 153 that accumulates energy of the carrier wave rectified by the rectifying unit 152 and serves as a driving power source, and the antenna 151. A clock extraction unit 154 that extracts a clock signal from the received carrier wave and supplies it to a control unit (described later) 157, a memory unit 155 that functions as an information storage unit that can store a predetermined information signal, and the antenna 151 The modulation / demodulation unit 156, and the control unit 157 for controlling the operation of the RFID circuit element To through the rectification unit 152, the clock extraction unit 154, the modulation / demodulation unit 156, and the like.

  The modem unit 156 demodulates the communication signal received from the antenna unit 3 of the reader 101 received by the antenna 151 and modulates the carrier wave received from the antenna unit 3 based on the return signal from the control unit 157. Then, it is retransmitted as a reflected wave from the antenna 151.

  The control unit 157 interprets the received signal demodulated by the modulation / demodulation unit 156, generates a return signal based on the information signal stored in the memory unit 155, and performs basic control such as returning by the modulation / demodulation unit 156. Execute proper control.

  The clock extraction unit 154 extracts a clock component from the received signal and extracts the clock to the control unit 157, and supplies a clock corresponding to the speed of the clock component of the received signal to the control unit 157.

  For example, the identification information (tag ID) for individually identifying the wireless tags Tb and Tt in the information signal stored in the memory unit 155 is the article wireless tag Tb to be affixed to the managed article 302. This is information that can be distinguished from the RFID tag Tt for the subject held by the management subject 303. Correspondingly, the reader 101 may detect and detect the article wireless tag Tb and the target person wireless tag Tt in different search modes, for example.

  FIG. 4 is a functional block diagram showing detailed configurations of the RF communication control unit 7 and the antenna unit 3.

  In FIG. 4, the antenna unit 3 is composed of one transmitting antenna (antenna element) 20 and three receiving antennas (antenna elements) 21A, 21B, and 21C in this example.

  The RF communication control unit 7 accesses (reads or writes) the information (wireless tag information) of the IC circuit unit 150 of the RFID circuit element To via the transmitting antenna 20 and the receiving antennas 21A, 21B, and 21C. Transmitting section 212 and receiving section 213 (= high frequency circuit), phase control unit 203A related to the receiving antenna 21A, phase control unit 203B related to the receiving antenna 21B, phase control unit 203C related to the receiving antenna 21C, and these phases And an adder 205 that combines outputs from the control units 203A, 203B, and 203C, processes signals read from the IC circuit unit 150 of the RFID circuit element To, reads information, and uses the RFID circuit element To For generating access information for accessing the IC circuit unit 150 It is connected the CPU4 the (CPU of the reader 101) including.

  The phase control units 203A, 203B, and 203C receive phase control signals from the CPU 4 and phase shifters 206A, 206B, and 206C that variably set the phases of received radio wave signals at the receiving antennas 21A, 21B, and 21C according to the phase control signals. The variable gain amplifiers 208A, 208B, and 208C that receive the signal from the CPU 4 and variably amplify the signals that are input from the phase shifters 206A, 206B, and 206C and output the signal to the adder 205 are input. And.

  The transmission unit 212 transmits a signal to the RFID circuit element To through the transmission antenna 20, and accesses the RFID tag information of the IC circuit unit 150 of the RFID circuit element To (reads / writes). A crystal oscillator 215A, a PLL (Phase Locked Loop) 215B, and a VCO (Voltage Controlled Oscillator) 215C for generating a carrier wave for the purpose, and modulating the generated carrier wave based on a signal supplied from the CPU 4 (this example) Then, a transmission multiplication circuit 216 (amplitude modulation based on the “TX_ASK” signal from the CPU 4) (in the case of the “TX_ASK signal”, an amplification factor variable amplifier or the like may be used) and a modulation modulated by the transmission multiplication circuit 216 Transmission that amplifies the wave (in this example, amplification whose amplification factor is determined by the “TX_PWR” signal from the CPU 4) And a pump 217. The carrier wave generated by the carrier wave generator preferably uses a UHF band or microwave band frequency, and the output of the transmission amplifier 217 is transmitted to the transmission antenna 20 to be transmitted to the RFID circuit element To. It is supplied to the IC circuit unit 150.

  The receiving unit 213 receives the reflected waves from the RFID circuit elements To received by the receiving antennas 21A, 21B, and 21C and receives them through the receiving antennas 21A, 21B, and 21C, and adds them through the phase control units 203A, 203B, and 203C. Necessary from the reception first multiplication circuit 218 that multiplies the reflected wave from the RFID circuit element To combined by the unit 205 and the carrier wave generated by the carrier wave generation unit, and the output of the reception first multiplication circuit 218. A first bandpass filter 219 for extracting only a signal in a wide band, a reception first amplifier 221 that amplifies an output of the first bandpass filter 219 and supplies the amplified signal to the first limiter 220, and the reception antennas 21A and 21B. , 21C, and after passing through the phase control units 203A, 203B, 203C, the adder 205 A reception second multiplication circuit 222 that multiplies the wave reflected from the RFID circuit element To by the carrier wave generated by the carrier wave generation unit and then delayed in phase by 90 ° by the phase shifter 227; A second band-pass filter 223 for extracting only a signal of a necessary band from the output of the multiplier circuit 222, and a reception second that inputs and amplifies and supplies the output of the second band-pass filter 223 to the second limiter 224. And an amplifier 225. The signal “RXS-I” output from the first limiter 220 and the signal “RXS-Q” output from the second limiter 224 are input to the CPU 4 and processed.

  The outputs of the reception first amplifier 221 and the reception second amplifier 225 are also input to an RSSI (Received Signal Strength Indicator) circuit 226, and a signal “RSSI” indicating the strength of these signals is input to the CPU 4. The distance to the wireless tags Tb and Tt to be communicated is calculated according to the signal intensity by an appropriate known method (described later). In this way, the RF communication control unit 7 of the reader 101 of the present embodiment demodulates the reflected wave from the RFID circuit element To by IQ orthogonal demodulation.

  The CPU 4 is a so-called microcomputer, and although not shown in detail, the CPU 4 includes a central processing unit such as a CPU, a ROM, a RAM, and the like. A program stored in the ROM in advance using the temporary storage function of the RAM. The signal processing is performed according to the above. The CPU 4 performs predetermined arithmetic processing after inputting the reception signal from the high frequency circuit receiving unit 213 and the operation signal of the operation unit 102A, and performs the amplification control signal and modulation control to the high frequency circuit transmission unit 212. A signal, a phase control signal to the phase control units 203A, 203B, and 203C, an image processing control signal to the management server 103, and the like are output.

  As described above, the most significant feature of the present embodiment is that the reader 101 detects the movement of the article wireless tag Tb handled in association with the management target article 302 via wireless communication, and manages based on the detection result of the reader 101. The server 103 controls the camera device 102 and the buzzer 104 to collect security information for an administrator or notify the administrator of the security information. Hereinafter, the details will be sequentially described.

  FIG. 5 is a flowchart showing a control procedure related to the operation of monitoring the wireless tags Tb and Tt performed by the CPU 9 of the management server 103 in order to perform the monitoring in the warehouse 300 as described above.

  In FIG. 5, when an instruction to start monitoring (monitoring) is input (for example, key operation) in the operation unit 11 of the management server 103, this flow is started. First, in step S10, information on each reference position (for example, a place that should be originally stored) manually input in advance by the operation unit 11 with respect to N management target articles 302 arranged in the warehouse 300 is stored in each management target article. It is registered in the tag information database (abbreviated as DB in the figure) 13 corresponding to 302.

  Although not particularly illustrated, N, which is a number for identifying each management target article 302, is initially set to 1 before proceeding to step S15 below. Then, the process proceeds to step S15, and it is determined whether or not an operation for ending this flow is performed from the operation unit 11. If an end operation has been performed, the determination is satisfied and this flow ends.

  If the end operation is not performed in step S15 and the determination is not satisfied, the process proceeds to step S20, where a control signal is output to the reader 101, and the mode is switched to a mode for searching for the management target article 302. In step S100, the reader 101 performs a search process for the Nth management target article 302. In the search process of step S100, detection of the tag ID of the wireless tag Tb for articles attached to the Nth management target article 302, the position in the warehouse 300 is detected and detected as position information, and the detection result is the reader. 101 (see the flow of FIG. 6 described later).

  Next, the process proceeds to step S25, based on the detection result of the reader 101 in step S100, whether or not the Nth management target article 302 has been found, that is, the article wireless tag Tb attached to the Nth management target article 302. To determine whether the corresponding tag ID is detected. If found, the determination is satisfied and the routine goes to Step S30.

  In the next step S <b> 30, it is determined whether or not article information is registered in the tag information database 13 for the Nth management target article 302. If the article information is not registered for the Nth management target article 302, the determination is not satisfied, and the process proceeds to step S35, where the position information, the tag ID, and the article information of the Nth management target article 302 detected in step S100 above. Are registered in the tag information database 13 and the process proceeds to step S40.

  In step S40, it is determined whether or not N is equal to or greater than the maximum value (total number of article wireless tags Tb). If N is less than the maximum value, the determination is not satisfied, and N is determined in the next step S45. After 1 is added, the process returns to step S15, and the loop is repeated until the end operation is performed. If N is equal to or greater than the maximum value in step S40 and the determination is satisfied, the process proceeds to step S50, where N is reset to 0 and wait processing (standby processing) for a predetermined time (for example, 1 minute) is performed. To Step S45. As a result, when all of the management target articles 302 are sequentially searched from N = 1, the search can be started again from the first one, and the search for such management target articles 302 takes one minute each time. It is possible to avoid the monitoring operation more than necessary at intervals and to save the CPU processing.

  On the other hand, if the item information of the Nth management target item 302 has already been registered in the tag information database 13 in step S30, the determination is satisfied, the process proceeds to step S53, and the detection result of the reader 101 in step S100 is determined. Based on the above, it is determined whether or not the detected position information of the management target article 302 is located outside a predetermined range from the reference position already registered in the tag information database 13. This determination is made based on whether or not the difference between the distance to the article wireless tag Tb detected by the reader 101 and the registered reference position is a predetermined value or more, as will be described later. It is also possible to determine whether or not the difference between the detection direction of the article wireless tag Tb using the directivity direction of the reader 101, which will be described later, and the direction of the registered reference position is a predetermined value or more. May be. You may determine by considering both of them.

  If the difference between the position information of the managed article 302 detected in step S100 and the reference position registered in the tag information database 13 is within a predetermined reference range, the determination in step S53 is not satisfied, Assuming that the security state of the Nth management target article 302 is not abnormal (not moved), the process proceeds to step S40, and the process for the Nth management target article 302 is finished and the next N + 1th (or next) The processing is continued for the search for the (N = 1) first management target article 302. If the determination in step S53 is satisfied, the process proceeds to next step S55.

  In step S55, it is determined whether or not the position information of the management target article 302 detected in step S100 is different from the position information of the same Nth management target article 302 detected last time (whether the difference is within a predetermined value). . This determination is made based on whether or not the difference between the distance to the article wireless tag Tb detected by the reader 101 and the previously detected Nth corresponding detection distance is equal to or greater than a predetermined value, as will be described later. Also, whether or not the difference between the detection direction of the article wireless tag Tb using the directivity direction of the reader 101, which will be described later, and the previous detection direction corresponding to the Nth is equal to or greater than a predetermined value. You may determine by. You may determine by considering both of them.

  When the position information of the management target article 302 detected in step S100 is substantially the same as the position information of the same Nth management target article 302 detected last time (the difference is within a predetermined value), the determination in step S55 is made. Is not satisfied and the N-th management target article 302 is regarded as having no abnormality (not moved), and the process proceeds to step S40. If the determination is satisfied, the process proceeds to the next step S60.

  In the next step S60, a control signal is output to the reader 101 and the mode is switched to a mode for searching for the management subject 303. Then, in the next step S200, the leader 101 searches for the management subject 303 in the warehouse 300. I do. In the search process in step S200, as in the search process for managed articles in step S200, the tag ID of the target person RFID tag Tt possessed by the management target person 303 is detected and the position in the warehouse 300 is detected. It is detected as position information (see the flow of FIG. 6 described later), and the detection result is input from the reader 101.

  Next, the process proceeds to step S65, based on the detection result of step S200, whether or not the management target person 303 is found, that is, whether or not the tag ID corresponding to the target person RFID tag Tt possessed by the management target person 303 is detected. Determine whether. If the tag ID (one of the tag IDs assigned to the target person's wireless tag Td) is found, the determination is satisfied, and the management target person 303 having the right movement authority legitimately carries out the management target article 302. The control signal is output to the reader 101 by assuming that it is in the process of being performed, and after carrying out the legitimate carry-out process (see FIG. 9 described later for details) in step S300, the process proceeds to step S40. If the management target person 303 is not found, the determination is not satisfied, and it is assumed that a person other than the proper management target person has moved the management target article 302 by mistake, and a control signal is output to the reader 101, and step S400 is performed. The erroneous movement security process (see FIG. 9 described later for details) is performed, and then the process proceeds to step S40.

  On the other hand, if the Nth management target article 302 is not found in step S25, the determination is not satisfied, the process proceeds to step S70, and the article information including the management state for the Nth management target article 302 from the tag information database 13 is obtained. Get

  Then, in the next step S75, it is determined whether or not the Nth management target article 302 is in a properly taken out state. In the article information obtained in step S70, if there is a record that a person with a legitimate authority has already taken out legitimately, the determination in step S75 is satisfied, and the Nth management target article 302 has already been stored from the warehouse 300. It is considered that it has been properly carried out and there is no problem, and the process proceeds to step S40. If there is no legitimately taken record, the determination is not satisfied and the routine goes to the next step S80.

  In step S80, as in step S60, a control signal is output to the reader 101, the mode is switched to a mode for searching for the management target person 303, and then the process proceeds to step S200 similar to that described above. A search process 303 is performed. That is, as described above, the tag ID of the RFID tag Tt for the target person possessed by the management target person 303 is detected, and the position in the warehouse 300 is detected and detected as position information (see the flow of FIG. 6 described later). ).

  Next, the process proceeds to step S85, and it is determined based on the detection result in step S200 whether or not the management target person 303 is found. If it is found, the determination is satisfied, and it is considered that one of the management target persons 303 took out the Nth management target article 302 without registering the take-out state of the management target article 302 in the article information of the tag information database 13. Then, after outputting a control signal to the reader 101 and carrying out the unauthorized take-out security process in step S500 (refer to FIG. 11 described later for details), the process proceeds to step S40. If the management target person 303 is not found, the determination is not satisfied, and it is assumed that a suspicious person other than the management target person has taken out the management target article 302, and a control signal is output to the reader 101, and the security process in step S600 ( For details, refer to FIG. 12 to be described later), and then the process proceeds to step S40.

  FIG. 6 is a flowchart showing a detailed procedure executed by the CPU 4 of the reader 101 in common with the article search process in step S100 and the target person search process in step S200. In the antenna unit 3 of the reader 101 in the present embodiment, when three response antennas 21A, 21B, and 21C are provided and one response signal propagates from an angle with respect to the antenna unit 3, the reception antennas 21A, 21B, The existence position of the radio tags Tb and Tt is detected by utilizing the fact that the difference in the phase of the received radio wave is generated by the difference in the path length at 21C.

  In FIG. 6, first in step S110, the direction of the reception antennas 21A, 21B, and 21C (reception) (= direction of the main lobe) is changed in a single direction while the direction is changed during search (details will be described later). ) Is set to θ = θSTART as an initial value of an angle θ in a directivity direction (hereinafter, referred to as a directivity angle as appropriate) from a certain reference position (for example, 0 ° in the direction to the left of the reader 101). The value of θSTART may be stored in advance in the memory 6 of the control unit 2 in a fixed manner, may be stored in a rewritable manner, or from the operation unit 11 of the management server 103 each time a search is performed. You may make it input.

  Next, the process proceeds to step S120, and the phase related to the receiving antennas 21A, 21B, and 21C is determined according to the directivity angle θ and the value of the distance d (= fixed value) between the receiving antennas 21A, 21B, and 21C. Corresponding phase control signals are output to the phase control units 203A, 203B, 203C. This procedure will be described in more detail with reference to FIG.

FIG. 7 is a diagram illustrating a procedure for determining a phase when the directivity angle is 45 ° as an example. In FIG. 7, the path length difference l [m] between the receiving antennas 21A, 21B, and 21C is
l = d × sin 45 °
= D × (1 / √2)
It is represented by

If the wavelength of the received wave is λ [m], a phase difference φ expressed by the following equation may be given between the phase shifters 206A, 206B, and 206C.
φ = 2π × (d / √2) × (1 / λ)
For angles other than 45 °, the corresponding phase difference φ may be given between the phase shifters 206A, 206B, and 206C based on the value of the directivity angle θ in the same manner as described above.

After step S120, in step S130, under the condition that the phases of the reception antennas 21A, 21B, and 21C are set as described above (in other words, the directivity angle θ is set), the search target wireless tag is transmitted from the transmission antenna 20. A ScrollID signal, which is a call signal for Tb and Tt, is output. Specifically, the tag IDs of the wireless tags Tb and Tt to be searched (for example, input from the server 103 to the control unit 2 via the communication network NW based on the setting input in the operation unit 11 of the server 103 or the storage in the memory 10 in advance). "TX_ASK" signal is generated and output to the first multiplier circuit 216, and the corresponding amplitude modulation is performed in the first multiplier circuit 216, and "Scroll" is used as access information.
ID "signal. On the other hand, the CPU 4 generates a “TX_PWR” signal and outputs it to the first amplifier 217, and the first amplifier 217 performs signal amplification at an amplification factor based on the “TX_PWR” signal and is finally transmitted via the transmission antenna 20. Then, a response from the RFID circuit element To of the RFID tags Tb and Tt to be searched is urged.

  Thereafter, in step S140, a response signal (= reply signal; RFID tag information including tag ID) transmitted from the RFID tag circuit element To of the RFID tags Tb and Tt to be searched corresponding to the “Scroll ID” signal is sent. The received signal strength signal “RSSI” from the RSSI circuit 226 at this time is received from the receiving antennas 21A, 21B, and 21C, phase-controlled by the phase control units 203A, 203B, and 203C, and taken in through the adder 204 and the receiving unit 213. In step S150, the value is input and stored in an appropriate storage unit such as a RAM in the memory 6 (or an external storage unit outside the CPU 4 or a non-volatile unit).

  In step S160, it is determined whether or not θ is equal to θEND (for example, a directivity angle θ change range) set in advance as a final value when the directivity angle θ is sequentially changed. Since θ = θSTART is initially satisfied, the determination is not satisfied, and only θSTEP predetermined in step S170 is added, and the process returns to step S130 and the same procedure is repeated.

  In this way, steps S130 to S170 are repeated to add θSTEP to the value of θ in small increments, while maintaining the directivity generated by all the receiving antennas 21A, 21B, and 21C in a single direction while gradually changing the directivity angle θ, Signal transmission and reception are repeated and the received signal is stored each time. If θ = θEND, the determination at step S160 is satisfied, and the routine goes to step S180.

  In step S180, the direction in which the wireless tags Tb and Tt exist is determined based on the signal strength stored in step S150 during the above-described repetition (except for the case of unsuccessful search described later) (for example, the signal strength was the highest). (Direction angle direction). Thereafter, in step S190, the distance between the reader 101 and the wireless tags Tb and Tt is determined (identified) based on the signal intensity. As shown in FIG. 8 as an example, this is performed by using the characteristic that the distance to the RFID circuit element To tends to increase as the signal strength “RSSI” of the response signal decreases. Then, position information based on the results of steps S180 and S190 is output to the server 103 via the network NW in step S195, and this flow is terminated. Note that the RSSI circuit 226 of the receiving unit 213 and step S190 of FIG. 6 constitute distance detection means for detecting the distance to the article wireless tag Tb. Note that the distance detection means may be a method of performing communication while varying (for example, gradually increasing) the transmission output and obtaining the distance from the output value when the communication is successful for the first time. Step S180 constitutes a direction detecting means for detecting the direction to the article wireless tag Tb. Further, step S180 and step S190 constitute a distance / direction detecting means for detecting the distance and direction to the article wireless tag Tb.

  If the response signals (tag IDs) from the search target wireless tags Tb and Tt are not obtained during the repetition of the above-described steps S130 to S170 (or a sufficiently large response signal is not obtained). ) Is regarded as unsuccessful search (or search impossible), the direction / distance calculation in step S180 and step S190 is not performed (or even if it is performed, an error calculation is performed), and the above result based on the result of this flow In step S25, step S65, and step S85 in FIG. 5, the determination is not satisfied because it is not found in the determination of whether or not the management target article / person is found.

  FIG. 9 is a flowchart showing a detailed procedure of the legitimate carry-out process in step S300 executed by the CPU 9 of the server 103. In FIG. 9, first, in step S310, management is performed among the plurality of installed camera apparatuses 102 based on the location of the management target person 303 detected by the reader 101 by the target person search process in step S200 of FIG. The camera device 102 in the optimal arrangement (for example, the closest arrangement) for imaging the target person 303 is selected and designated.

  In the next step S320, a shooting control signal is output to the camera device 102 designated in step S310, and a still image of the management subject 303 is taken. At this time, zooming control such as zooming in / out of the camera apparatus 102 or focal position control such as focusing is performed according to the distance between the reader 101 detected in step S200 and the RFID tag Tt for the subject. I do. The captured still image of the person to be managed 303 is input from the camera device 102 to the management server 103, displayed on the display unit 12, and stored in the memory 10 or the tag information database 13. Although detailed description is omitted, each camera device 102 stores the positional relationship with the reader 101 and the imaging direction in the memory 6, and the distance and direction detected by the reader 101 should be controlled by the CPU 4 by the CPU 4. The distance and direction are set.

  Next, the process proceeds to step S330, and the presence position of the article wireless tag Tb newly detected by the article search process of step S100 is determined for the article information corresponding to the Nth management target article 302 in the tag information database 13. Update registration is completed and this flow is completed.

  With the above flow, while the authorized management subject 303 is legitimately carrying out the managed article 302, the still image of the state is captured, displayed, stored, and confirmed by the video. As the Nth management target article 302 moves, the new location can be updated and registered in the article information in the tag information database 13.

  FIG. 10 is a flowchart showing a detailed procedure of the erroneous movement security process in step S400 executed by the CPU 9 of the server 103. In FIG. 10, first, in step S410, all installed camera apparatuses 102 are selected and designated.

  In the next step S420, a shooting control signal is output to all the designated camera devices 102, and a still image of the entire warehouse 300 is captured by these camera devices 102. At this time, it is preferable that each camera apparatus 102 performs zooming control so as to zoom out most so that an image can be captured in as wide a range as possible. And the still image in the warehouse 300 which each camera apparatus 102 imaged is sent to the management server 103, and is each displayed on the display part 12, and memorize | stored in the memory 10 or the tag information database 13.

  In the next step S430, a drive signal is output to the buzzer 104 to sound it, and the administrator is notified of an abnormality in the security state of the article 302 to be managed.

  Next, the process proceeds to step S440, where an erroneous movement state is registered for the article information corresponding to the Nth management target article 302 in the tag information database 13, and this flow is terminated.

  According to the above flow, in the case where a person other than the right management target person 303 (a person who does not wear the wireless tag Tt such as an outsider) accidentally moves the management target article 302, the entire warehouse 300 It is possible to capture, display, and store a still image so that the person can be confirmed, and to register in the article information of the tag information database 13 that the Nth management target article 302 is in an erroneous movement state. it can.

  FIG. 11 is a flowchart showing a detailed procedure of the unauthorized take-out security process in step S500 executed by the CPU 9 of the server 103. In FIG. 11, first, in step S510, as in step S310 of FIG. 9, the management target is determined based on the location of the management target person 303 detected by the reader 101 by the target person search process of step S200 of FIG. The camera device 102 that is optimally positioned to image the person 303 is selected and designated.

  Then, in the next step S520, a shooting control signal is output to the camera device 102 designated in step S510, and a still image of the management subject 303 is taken. At this time, zooming control such as zooming in / out of the camera apparatus 102 or focal position control such as focusing is performed according to the detected distance between the reader 101 and the target RFID tag Tt. The captured still image of the person to be managed 303 is input from the camera device 102 to the management server 103, displayed on the display unit 12, and stored in the memory 10 or the tag information database 13.

  Then, in the next step S530, similarly to the above, a drive signal is output to the buzzer 104 to ring, and the manager is notified of an abnormality in the security state of the management target article 302.

  Next, the process proceeds to step S330, where an unauthorized removal state is registered for the item information corresponding to the Nth management target item 302 in the tag information database 13, and this flow is terminated.

  According to the above flow, in the case where the authorized management person 303 has already taken out the Nth management target article 302 without registering the take-out state of the management target article 302 in the article information of the tag information database 13, A still image of the person to be managed 303 is captured, displayed, stored, and can be confirmed, and the N-th article 302 to be managed is registered in the article information in the tag information database 13 without permission. can do.

  FIG. 12 is a flowchart showing a detailed procedure of the theft security process in step S600 executed by the CPU 9 of the server 103. In FIG. 12, first, in step S610, all installed camera apparatuses 102 are selected and designated.

  In the next step S620, a shooting control signal is output to all the designated camera devices 102, and still images of the entire warehouse 300 are captured by these camera devices 102. At this time, it is preferable to perform zooming control so that each camera device 102 zooms out most so that the image can be captured in as wide a range as possible. . And the still image in the warehouse 300 which each camera apparatus 102 imaged is sent to the management server 103, and is each displayed on the display part 12, and memorize | stored in the memory 10 or the tag information database 13.

  In the next step S630, a drive signal is output to the buzzer 104 to sound it, and the manager is notified of an abnormality in the security state of the managed article 302.

  Next, the process proceeds to step S640, where the theft state is registered for the item information corresponding to the Nth management target item 302 in the tag information database 13, and this flow ends.

  According to the above flow, when a person other than the authorized management subject 303 (a suspicious person who does not wear the wireless tag Tt) has already taken out the management target article 302, a still image of the entire warehouse 300 is captured and captured. It is possible to confirm the appearance of the person concerned by displaying and storing it, and to register in the article information of the tag information database 13 that the Nth management target article 302 is in a stolen state.

  In the above, the transmission unit 212, the reception unit 213, and the CPU 4 illustrated in FIG. 4 constitute a communication unit that performs wireless information communication with the article wireless tag Tb via the antenna unit 3, and the phase control unit 203A and the phase control unit 203B. The phase control unit 203C, the adder 205, and the CPU 4 constitute directivity control means for changing the directivity direction (main lobe direction) of the antenna unit 3.

  Further, step S53 and step S55 of the flow shown in FIG. 5 executed by the CPU 9 of the management server 103 are performed according to the previous detection result and the current detection result by the RSSI circuit 226 (particularly according to the difference between the detection results). This corresponds to determination means for determining the movement state of the article wireless tag Tb.

  Further, step S600 of the flow shown in FIG. 5 executed by the CPU 9 of the management server 103 detects an intruder in the management target area according to the detection result of the article movement detection by the reader 101 and the detection result of the target person detection. It corresponds to intruder detection means.

  Further, step S310 of the flow shown in FIG. 9 and step S510 of the flow shown in FIG. 11 executed by the CPU 9 of the management server 103 include the wireless tag Tt for the target person detected by the reader 101 among the plurality of camera devices 102. This corresponds to imaging selection instruction means for actuating a predetermined one according to the position. Further, step S410 of the flow shown in FIG. 10 and step S610 of the flow shown in FIG. 12 executed by the CPU 9 of the management server 103 correspond to all imaging instruction means for operating all of the plurality of camera devices 102.

  Further, step S320 of the flow shown in FIG. 9 and step S520 of the flow shown in FIG. 11 executed by the CPU 9 of the management server 103 are the zoom control of the camera apparatus 102 or the control according to the distance to the target wireless tag Tt. This corresponds to a scaling / focus control means for performing focus position control.

  In this embodiment configured as described above, the RSSI circuit 226 detects the distance from the reader 101 to the article wireless tag Tb associated with the managed article 302, and the managed article 302 is detected by the change in the distance. If any unclear situation occurs in article management based on the detection result, the management server 103 operates the camera device 102 to collect security information by imaging a predetermined location. Then, the buzzer 104 is sounded and the security information notification is performed by voice. In this way, it is possible to improve security in article management by detecting the movement state rather than mere article arrangement information and operating the camera device 102 and the buzzer 104 based on the detected movement state.

  In this embodiment, in particular, the transmission unit 212 and the reception unit 213 are for articles while changing the directivity direction of the antenna unit 3 by the phase control unit 203A, the phase control unit 203B, the phase control unit 203C, the adder 205, and the CPU 4. By performing directivity control for communicating with the wireless tag Tb, the movement of the management target article 302 can be reliably detected. In addition, this makes it possible to detect the movement behavior of the article to be managed 302 in a relatively wide range with one antenna unit 3 and to reduce the number of installed antennas.

  In this embodiment, in particular, in steps S53 and S55 of the flow shown in FIG. 5 executed by the CPU 9 of the management server 103, the difference between the previous detection distance and the current detection distance by the RSSI circuit 226 is greater than or equal to a predetermined value. If it is determined that the article RFID tag Tb has moved, detection of subtle positional deviation due to vibration of the article to be managed 302 or misdetection due to measurement error can be avoided, and the article to be managed originally desired to be detected Only the movement of 302 can be reliably detected.

  In this embodiment, in particular, the reader 101 detects that the target wireless tag Tt associated with the management target person 303 is located within the communication range, so that not only the movement behavior of the management target article 302 is further managed. Considering the position behavior of the target person 303, it is possible to comprehensively manage the articles, and it is possible to improve the security more reliably.

  In this embodiment, in particular, the camera device 102 is operated when an intruder into the management target area is detected by steps S25, S65, and S85 of the flow shown in FIG. 5 executed by the CPU 9 of the management server 103. By doing so, the image of the intruder, the outer shape of the corresponding article, etc. can be reliably imaged (and can be recorded) in the form of an image, and security security can be improved reliably.

  In this embodiment, in particular, the target detected by the reader 101 among the plurality of camera devices 102 by step S310 of the flow shown in FIG. 9 executed by the CPU 9 of the management server 103 and step S510 of the flow shown in FIG. Since it is possible to select and operate a predetermined one (for example, a close one) according to the position of the person's wireless tag Tt, for example, by taking an image from the camera device 102 closest to the management subject 303, a clear image can be obtained. Video can be recorded reliably.

  In this embodiment, in particular, in order to operate all of the plurality of camera devices 102 by step S410 of the flow shown in FIG. 10 executed by the CPU 9 of the management server 103 and step S610 of the flow shown in FIG. When it is desired to perform a wide search, such as when the location of the management subject 303 or the management target article 302 is unknown, video information over a wide range can be recorded by all the camera devices 102.

  Further, in this embodiment, in particular, the camera device according to the distance to the target wireless tag Tt by step S320 of the flow shown in FIG. 9 executed by the CPU 9 of the management server 103 and step S520 of the flow shown in FIG. By performing the zooming control or the focal position control of 102, the management target person 303 and the video in the vicinity thereof can be recorded more reliably and clearly.

  Note that the security information notification to the manager is not limited to the voice notification by the buzzer 104, and the security information notification by optical means such as blinking the light is also possible. As a result, when some unclear situation occurs in the article management, etc., the security information notification to the administrator can be performed by performing optical notification separately (or in combination) separately from the voice notification as necessary. This can be done reliably and security can be further improved.

  Note that the next movement position of the article wireless tag Tb is predicted according to the previous detection result and the current detection result by the RSSI circuit, and the next movement position is determined by the focal position control when the next imaging is performed. Further, the camera apparatus 102 may be controlled to be in focus, so that a clearer image can be reliably recorded. In addition, a known autofocus control as a focal position control device may be performed by the camera device 102 alone, and in that case, a clearer image can be reliably recorded.

  Note that the image captured by the camera device 102 is not limited to the above-described still image, and the behavior of the management subject 303 may be captured by a moving image and displayed on the management server 103. In that case, it is preferable to provide a large-capacity moving image recording apparatus on the management server 103 side so that moving images can be recorded.

  In addition, the RF communication control unit 7 performs so-called phased array control in which the phase control units 203A to 203C perform the so-called phased array control in which the directions are sequentially changed while maintaining the directivity by the plurality of antennas in a single direction. There is also an effect that the antenna directivity can be changed.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and technical idea of the present invention. Hereinafter, such modifications will be described in order.

(1) When changing the directivity direction by rotating the antenna In the above embodiment, by performing so-called phased array control that sequentially changes the direction while maintaining the directivity by a plurality of antennas in a single direction, Although the antenna directivity was changed, the present invention is not limited to this. For example, a highly directional antenna such as a Yagi antenna is used as a receiving antenna, and the directionality is changed by rotating it with a turntable or the like. You may let them.

  In the case of this modification, although not particularly illustrated, the rotation angle of the turntable is controlled by the CPU 4 of the reader 101, and the angle of the directivity direction (main lobe direction) of the antenna such as the Yagi antenna is set as the directivity angle θ in FIG. A search processing flow (step S110 is unnecessary) may be performed. Thereby, it is not necessary to provide the phase control unit 203A, the phase control unit 203B, the phase control unit 203C, and the adder 205 in the RF communication control unit 7, and the configuration of the entire reader 101 can be relatively simplified.

(2) In the case where a specific operation exception person is set In the above, the buzzer 104 is sounded if a predetermined condition is satisfied without providing an exception. However, the present invention is not limited to this. An operation exception of this system may be made for a specific management target person 303 registered in the information database 13 or the like, and the operation of the buzzer 104 or the like may be suppressed (suppression control means).

  In this case, for example, the buzzer 104 can be prevented from operating exceptionally for a specific management target person 303 such as a maintenance person or an administrator, so that convenience can be further improved.

  It is assumed that the “Scroll ID” signal and the like used above comply with the specifications formulated by EPC global. EPC global is a non-profit corporation established jointly by the International EAN Association, which is an international organization of distribution codes, and the United Code Code Council (UCC), which is an American distribution code organization. Note that signals conforming to other standards may be used as long as they perform the same function.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

It is a top view showing an example at the time of applying the article management system of one embodiment of the present invention to the warehouse which stores many articles of management object. It is a system configuration figure showing the outline of the article management system of an embodiment. FIG. 2 is a block diagram illustrating an example of a functional configuration of a wireless tag circuit element provided in a wireless tag attached to or possessed by an article or a management target person to be searched by a reader illustrated in FIG. 1. It is a functional block diagram showing the detailed structure of a RF communication control part and an antenna unit. It is a flowchart showing the control procedure regarding the monitoring operation | movement of the wireless tag which CPU of a management server performs in order to monitor in a warehouse. It is a flowchart showing the detailed procedure which is common to the article search process of step S100 and the target person search process of step S200 shown in FIG. It is explanatory drawing for demonstrating the principle of a phase determination. It is a figure which shows an example of the relationship between the distance to a radio | wireless tag circuit element, and received signal strength. It is a flowchart showing the detailed procedure of the legitimate carrying-out process of step S300 shown in FIG. It is a flowchart showing the detailed procedure of the mismovement security process of step S400 shown in FIG. It is a flowchart showing the detailed procedure of the unauthorized take-out security process of step S500 shown in FIG. It is a flowchart showing the detailed procedure of the theft security process of step S600 shown in FIG.

Explanation of symbols

2 Control unit 3 Antenna unit (antenna)
4 Reader CPU (communication means, directivity control means)
9 CPU for server
13 Tag information database 100 Article management system 101 Reader (article movement detection means, target person detection means)
102 Camera device (security device, imaging means)
103 Management server (security control means)
104 buzzer (security / notification)
203A phase control unit (directivity control means)
203B Phase control unit (directivity control means)
203C Phase control unit (directivity control means)
205 adder (directivity control means)
212 Transmitter (communication means)
213 Receiver (Communication means)
226 RSSI circuit (distance detection means)
DESCRIPTION OF SYMBOLS 300 Warehouse 302 Management object article 303 Management object person Tb Article wireless tag Tt Object person wireless tag To RFID circuit element

Claims (14)

Article movement detection means for detecting movement of an article wireless tag to be handled in association with an article to be managed via wireless communication;
A security device for collecting security information for managers or reporting security information to managers;
Security control means for operating the security device based on the detection result of the article movement detection means;
Have
The article movement detection means includes distance detection means for detecting a distance to the article wireless tag,
The distance detecting means is
Detect the distance, the direction, or the distance and direction repeatedly at predetermined time intervals,
The article movement detection means includes
An article management system comprising: a determination unit that determines a movement state of the article wireless tag according to a difference between a previous detection result and a current detection result by the distance detection unit . Article movement detection means for detecting movement of an article wireless tag to be handled in association with an article to be managed via wireless communication;
A security device for collecting security information for managers or reporting security information to managers;
Security control means for operating the security device based on the detection result of the article movement detection means;
Have
The article movement detection means includes
Comprising a direction detecting means for detecting the direction to the article wireless tag,
The direction detecting means includes
Detect the distance, the direction, or the distance and direction repeatedly at predetermined time intervals,
The article movement detection means includes
A determination unit configured to determine a moving state of the article wireless tag according to a difference between a previous detection result and a current detection result by the direction detection unit;
An article management system characterized by the above. Article movement detection means for detecting movement of an article wireless tag to be handled in association with an article to be managed via wireless communication;
A security device for collecting security information for managers or reporting security information to managers;
Security control means for operating the security device based on the detection result of the article movement detection means;
Have
The article movement detection means includes
A distance / direction detecting means for detecting a distance and a direction to the article wireless tag;
The distance / direction detecting means includes
Detect the distance, the direction, or the distance and direction repeatedly at predetermined time intervals,
The article movement detection means includes
A determination unit that determines a moving state of the article wireless tag according to a difference between a previous detection result and a current detection result by the distance / direction detection unit;
An article management system characterized by the above. The article management system according to any one of claims 1 to 3 ,
The article movement detection means includes
An antenna for wireless communication;
Communication means for performing wireless information communication with the article wireless tag via the antenna;
An article management system comprising directivity control means for changing the directivity direction of the antenna. The article management system according to any one of claims 1 to 3 ,
When the difference between the previous detection result and the current detection result by the distance detection unit, the direction detection unit, or the distance / direction detection unit exceeds a predetermined value, the determination unit An article management system characterized by determining that a tag has moved. The article management system according to any one of claims 1 to 5 ,
An article management system comprising a target person detecting means for detecting that a target person wireless tag associated with a management target person is located within a communication range. The article management system according to claim 6 .
And a deterrence control unit configured to deter the operation of the security device when the target person detection unit detects the target radio tag corresponding to the specific management target person registered in advance. Article management system. The article management system according to claim 6 or 7 ,
The article management system, wherein the security device is an imaging unit that performs imaging in a predetermined direction as the security information. The article management system according to claim 8 .
According to the detection result of the article movement detection means and the detection result of the subject detection means,
An article management system comprising intruder detection means for detecting an intruder in a management target area. The article management system according to claim 9 ,
The article management system, wherein the security control means operates the imaging means when the intruder detection means detects the intruder. The article management system according to any one of claims 8 to 10 ,
A plurality of the imaging means are provided so as to respectively capture a plurality of locations in the management target area,
The security control means includes imaging selection instruction means for selecting and operating a predetermined one of the plurality of imaging means according to the position of the target person wireless tag detected by the target person detection means. An article management system characterized by The article management system according to any one of claims 8 to 10 ,
A plurality of the imaging means are provided so as to respectively capture a plurality of locations in the management target area,
The article management system, wherein the security control means includes all imaging instruction means for operating all of the plurality of imaging means. The article management system according to any one of claims 8 to 12 ,
An article management system comprising a scaling / focusing control unit that performs scaling control or focus position control of the imaging unit in accordance with a distance to the subject wireless tag. The article management system according to any one of claims 1 to 13 ,
The article management system according to claim 1, wherein the security device includes a reporting unit that reports the security information to the manager using voice or optical means.

Images