Opening / closing detection sensor and system

Abstract

To accurately detect the opening / closing state of a movable portion that opens and closes relative to a frame body to which a strike box is attached.SOLUTION: There is provided an opening / closing detection sensor that detects the opening / closing state of a movable portion that opens and closes relative to a frame body to which a strike box is attached, the sensor having a radio tag and an antenna for communicating with the radio tag via radio waves. One of the radio tag and the antenna is placed within the strike box, and the other of the radio tag and the antenna is placed at an end of the movable portion that faces the inside of the strike box when the movable portion is closed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an open / close detection sensor and system. [Background technology]

[0002] 2. Description of the Related Art Electric locks that electrically lock and unlock doors are generally known and are disclosed in, for example, Patent Document 1.

[0003] A technology that uses magnets as a mechanism for detecting the opening and closing of a door in such an electric lock is disclosed in Patent Document 2. The technology disclosed in Patent Document 2 detects the opening and closing of a door using a detection-side magnet provided on the back side of the front panel that is fixed to the end surface of the door, and a detected-side magnet held in a troyoke recessed in the door fixture.

[0004] Furthermore, a technology that uses an RFID tag as a mechanism for detecting the opening and closing of a door in an electric lock is disclosed in Patent Document 3. In the technology disclosed in Patent Document 3, the opening and closing of an opening and closing member is detected by an RFID tag attached to one of the opening and closing member and the door frame, and an RFID reader attached to the other of the opening and closing member and the door frame. Summary of the Invention [Problem to be solved by the invention]

[0005] However, in devices that use magnets to detect whether a door is open or closed, depending on the attachment position and sensitivity of the magnet, the door may be erroneously detected as closed even when it is only slightly open.

[0006] In addition, in devices that use RFID tags to detect whether a door is open or closed, if the RFID tag is within the communication range of the RFID reader, the information can be read from the RFID tag, which may result in the door being mistakenly detected as closed even when it is not completely closed.

[0007] The present invention has been made in consideration of the above-mentioned points, and aims to provide an opening / closing detection sensor and system that can accurately detect the opening / closing state of a movable part that opens and closes relative to a frame body. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides An opening / closing detection sensor that detects the opening / closing state of a movable part that opens and closes with respect to a frame body to which a troyoke is attached, A wireless tag; an antenna for communicating with the wireless tag via radio waves; One of the wireless tag and the antenna is disposed within the trolley; The other of the wireless tag and the antenna is an opening / closing detection sensor that is arranged at the end of the movable part that faces the inside of the troyoke when the movable part is closed. Effect of the Invention

[0009] According to the present invention, the open / closed state of the movable part that opens and closes relative to the frame can be detected with high accuracy. [Brief description of the drawings]

[0010] [Figure 1] 1 is a block diagram showing an embodiment of an open / close detection sensor of the present invention; [Diagram 2] 2 is a block diagram showing an example of a hardware configuration of a reader main body shown in FIG. 1. [Diagram 3] 2 is a diagram showing an example of an installation form of the RFID tag shown in FIG. 1. [Figure 4] 2 is a diagram showing an example of an installation form of the RFID reader shown in FIG. 1. [Diagram 5] 4 is a flowchart for explaining an example of an operation of the door opening / closing sensor shown in FIG. [Figure 6] 2 is a sequence diagram of an example of an operation of the door opening / closing sensor shown in FIG. 1. [Figure 7]5 is a diagram showing a state in which the door is opened and closed in the configuration shown in FIG. 3 and FIG. 4. FIG. [Figure 8] FIG. 2 is a diagram illustrating an example of a system using the RFID reader illustrated in FIG. [Figure 9] 9 is a diagram illustrating an example of a configuration of a server illustrated in FIG. 8. [Figure 10] 1. FIG. 4 is a diagram showing another example of the installation form of the RFID tag shown in FIG. [Figure 11] 11 is a flowchart for explaining an example of an operation of the door opening / closing sensor in the installation form shown in FIG. [Figure 12] 11 is a diagram showing a state in which the door is locked in the mode shown in FIG. 10. FIG. [Figure 13] 10 is a flowchart for explaining a process of updating thresholds for the transmission strength and reception strength of radio waves in an RFID antenna. [Figure 14] 1. FIG. 4 is a diagram showing another example of a system using the RFID reader shown in FIG. [Figure 15] 15 is a diagram illustrating an example of a configuration of the information processing device illustrated in FIG. 14. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] <Configuration of Open / Close Detection Sensor> FIG. 1 is a block diagram showing an embodiment of an open / close detection sensor of the present invention.

[0013] The open / close detection sensor in this embodiment is a door open / close sensor 1 having an RFID (Radio Frequency Identification) tag 10 and an RFID reader 20, as shown in FIG.

[0014] The RFID tag 10 is an example of a wireless tag in the present invention. The RFID tag 10 is configured to be capable of wireless communication with the RFID reader 20 via radio waves, and transmits, for example, its own tag ID as a response signal in response to a signal transmitted from the RFID reader 20.

[0015] The RFID reader 20 includes a reader body 30 and an RFID antenna 21 which is an example of the antenna of the present invention.

[0016] The reader main body 30 has an RFID reader unit 31, an operation unit 32, a display unit 33, a wireless communication unit , a communication antenna 35, a control unit , a power supply unit 37, and a storage unit .

[0017] The RFID reader unit 31 performs wireless communication with the RFID tag 10 via the RFID antenna 21. Specifically, the RFID reader unit 31 transmits a command to the RFID tag 10 to transmit its own tag ID, and receives the tag ID transmitted from the RFID tag 10. When the RFID reader unit 31 receives the tag ID from the RFID tag 10, it notifies the control unit 36 ​​of the received tag ID and the reception strength of the radio waves transmitted via the RFID antenna 21 at that time.

[0018] The operation unit 32 is configured to be operable from the outside like a button switch, etc. The operation unit 32 can be used to specify the transmission strength of radio waves via the RFID antenna 21 and the threshold of the reception strength of radio waves via the RFID antenna 21 for determining whether the door is open or closed, which will be described later.

[0019] The display unit 33 can display the open / closed state of the door determined by the control unit 36. A display device with a touch panel such as an LED, LCD, or organic EL can be used as the display unit 33. When a display device with a touch panel is used, the display device serves as both the operation unit 32 and the display unit 33.

[0020] The wireless communication unit 34 is an example of a communication means in the present invention, and transmits and receives information via the communication antenna 35. For example, the open / closed state of the door notified from the control unit 36 ​​is transmitted via the communication antenna 35. Also, the transmission strength of the radio wave via the RFID antenna 21 and the threshold of the reception strength of the radio wave via the RFID antenna 21 for determining whether the door is open or closed are received via the communication antenna 35. The wireless communication unit 34 may be a SIM (carrier communication), or an LPWA such as WiFi, BLE, or LoRa. Note that LoRa is a type of LPWA (Low Power Wide Area), and is a wireless communication method established by SEMTECH, Inc. in the United States. By using chirp spectrum spreading for wireless modulation, communication is possible even with a weak signal, and long-distance communication is possible with low power consumption.

[0021] The control unit 36 ​​controls the RFID reader unit 31 to read the tag ID from the RFID tag 10. Specifically, the control unit 36 ​​causes the RFID reader unit 31 to execute the operation of reading the tag ID from the RFID tag 10, and judges the open / closed state of the door based on the tag ID read and notified by the RFID reader unit 31 and the reception strength at that time. Then, the control unit 36 ​​causes the display unit 33 to display the open / closed state of the door, and notifies the wireless communication unit 34. The control unit 36 ​​sets the transmission strength of the radio wave via the RFID antenna 21 and the threshold value of the reception strength of the radio wave via the RFID antenna 21 for judging whether the door is open or closed. The transmission strength of the radio wave and the threshold value of the reception strength of the radio wave are received via the wireless communication unit 34 or designated by the operation unit 32.

[0022] The power supply unit 37 supplies power to the reader main body 30. The power supply unit 37 may be a dry cell or a rechargeable battery in order to eliminate the need for wiring when installing the reader main body 30. Also, the power supply unit 37 may be an AC adapter or a USB power source in order to eliminate the trouble of battery replacement and charging.

[0023] The memory unit 38 stores settings such as the transmission strength of radio waves via the RFID antenna 21 and the threshold value of the reception strength of radio waves via the RFID antenna 21 for determining whether the door is open or closed, which are set by the control unit 36.

[0024] The reader main body 30 has a circuit board built into the housing, and an RFID reader unit 31, a wireless communication unit 34, a CPU constituting a control unit 36, and the like are mounted on this circuit board.

[0025] In order to reduce costs, the operation unit 32 and the display unit 33 may not be provided, and notification of the door open / closed state and setting of the radio wave intensity and threshold value may be performed via the wireless communication unit .

[0026] FIG. 2 is a block diagram showing an example of a hardware configuration of the reader main body 30 shown in FIG.

[0027] 2, the reader main body 30 shown in Fig. 1 has, as its hardware configuration, a CPU (Central Processing Unit) 81, a ROM (Read Only Memory) 82, a RAM (Random Access Memory) 83, a HDD (Hard Disk Drive) / SSD (Solid State Drive) 84, and an I / F (Interface) 85. These are electrically connected to each other via a bus line L.

[0028] The CPU 81 is an arithmetic device that executes a program stored in the ROM 82 to sequentially execute branch processing, iterative processing, and the like. The ROM 82 is a non-volatile memory that stores the program executed by the CPU 81. The RAM 83 is a memory that functions as a work area for the operation of the CPU 81. The bus line L is an address bus, a data bus, and the like for electrically connecting each component such as the CPU 81. The HDD (Hard Disk Drive) / SSD (Solid State Drive) 84 stores the determination result in the control unit 36. In addition, the HDD (Hard Disk Drive) / SSD (Solid State Drive) 84 stores the set value of the transmission strength of the radio wave from the RFID antenna 21 and the reception strength of the radio wave via the RFID antenna 21. The I / F 85 exchanges information with the operation unit 32 and the display unit 33. In addition, it functions as the wireless communication unit 34, and can also transmit and receive information via the communication antenna 35.

[0029] <Door opening / closing sensor installation form> Fig. 3 is a diagram showing an example of an installation form of the RFID tag 10 shown in Fig. 1. Fig. 4 is a diagram showing an example of an installation form of the RFID reader 20 shown in Fig. 1, where (a) is a diagram showing the fitting frame as viewed obliquely, and (b) is a diagram showing the fitting frame as viewed from its end face side.

[0030] As shown in Fig. 3, in this example, the RFID tag 10 shown in Fig. 1 is attached to a door 40 to which a door handle 41 and a thumb turn 42 are attached and a latch bolt 43 and a dead bolt 44 are attached to an end 47 of the door 40. The door 40 is an example of a movable part in the present invention. The RFID tag 10 is disposed and attached between the latch bolt 43 and the dead bolt 44 at the end 47 of the door 40. The latch bolt 43 and the dead bolt 44 are bolts for locking the door 40 by engaging the door 40 with the fitting frame 52 to close the door 40 or for locking the door. The RFID tag 10 can be attached to the end 47 of the door 40 using double-sided tape or the like.

[0031] Also, as shown in FIG. 4, a locking device 51 is attached to the door frame 52 of the door 50 through which the door 40 shown in FIG. 3 is opened and closed, and the RFID antenna 21 shown in FIG. 1 is disposed and attached within the locking device 51. The locking device 51 is a part having a recess into which bolts such as the latch bolt 43 and the deadbolt 44 can be inserted, and is a bolt receiving member. The door frame 52 is an example of a frame in the present invention. The locking device 51 is made of a radio wave shielding material such as a metal such as aluminum or steel. The RFID antenna 21 can be attached to the door frame 52 using double-sided tape or the like. The reader body 30 shown in FIG. 1 is attached to the outer surface of the door 50, and is electrically connected to the RFID antenna 21 via a cable. As a result, the reader body 30 is attached to the outside of the locking device 51, and the wireless communication unit 34 is in a state where it can communicate without any radio wave shielding such as the locking device 51.

[0032] In this configuration, when the door 40 is closed, the RFID antenna 21 disposed in the troyoke 51 faces the RFID tag 10 attached to the end 47 of the door 40. That is, the RFID tag 10 is disposed at the end 47 of the door 40 that faces the inside of the troyoke 51 when the door 40 is closed.

[0033] <Door opening / closing sensor 1 operation> The operation of the door opening / closing sensor 1 configured and installed as described above will be described below.

[0034] Fig. 5 is a flow chart for explaining an example of the operation of the door opening / closing sensor 1 shown in Fig. 1. Fig. 6 is a sequence of an example of the operation of the door opening / closing sensor 1 shown in Fig. 1.

[0035] With the RFID tag 10 attached to the door 40 as shown in Fig. 3 and the RFID reader 20 attached to the door frame 52 as shown in Fig. 4, the RFID reader 20 reads the tag ID from the RFID tag 10 (step S1). As shown in Fig. 6, the control unit 36 ​​instructs the RFID reader unit 31 to read the tag ID from the RFID tag 10. It is preferable to read the tag ID periodically, for example, every 100 ms. When the RFID reader unit 31 receives a read instruction from the control unit 36, it transmits an instruction to the RFID tag 10 to transmit its own tag ID via the RFID antenna 21.

[0036] FIG. 7 is a diagram showing a state in which the door 40 in the configuration shown in FIGS. 3 and 4 is opened and closed.

[0037] When the door 40 is not completely closed in the form shown in Fig. 3 and Fig. 4, the RFID tag 10 does not face the RFID antenna 21 as shown in Fig. 7(a). Therefore, even if a command to transmit the tag ID of the RFID tag 10 is transmitted via the RFID antenna 21, the tag ID of the RFID tag 10 is not read by the RFID reader 20. In addition, at this time, the RFID tag 10 does not pass through the end (dashed line A) of the troyoke 51, and the troyoke 51 is made of a radio wave shielding material such as metal, so that a radio wave shielding material is interposed between the RFID tag 10 and the RFID antenna 21. Therefore, the RFID reader 20 cannot communicate with the RFID tag 10 via the RFID antenna 21. It is preferable that the case 45 and the strike 46 of the door 40 are also made of a radio wave shielding material such as metal, like the troyoke 51, so that the radio waves from the RFID antenna 21 do not reach outside the troyoke 51. Furthermore, the radio frequency bands used by the RFID reader 20 and the RFID tag 10 generally include the LF band (up to 130 kHz, communication distance: 10 cm), the HF band (13.56 MHz, communication distance: several tens of cm), the UHF band (860 to 920 MHz, communication distance: several meters), and the microwave band (2.45 GHz, communication distance: 1 to 2 meters), with the HF band being preferred as it has a short communication distance and is less susceptible to interference from radio waves (relatively high frequency).

[0038] The control unit 36 ​​determines that the door 40 is open when a command to transmit the tag ID of the RFID tag 10 is transmitted via the RFID antenna 21 but the tag ID of the RFID tag 10 is not received via the RFID antenna 21 (step S2).

[0039] Then, the control unit 36 ​​notifies the user that the door 40 is open by displaying the information on the display unit 33 and transmitting the information to the server device 70 (described later) via the wireless communication unit 34 (step S3). At this time, since the reader main body 30 is attached to the outside of the troyoke 51, the wireless communication unit 34 can transmit the information that the door 40 is open without any radio wave obstruction such as the troyoke 51.

[0040] On the other hand, when the tag ID of the RFID tag 10 is received via the RFID antenna 21, the control unit 36 ​​judges whether the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is equal to or greater than a first threshold (step S4). This first threshold is preset in the control unit 36 ​​by being specified via the operation unit 32 or received via the wireless communication unit 34, and is stored in the storage unit 38.

[0041] Then, when the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 is less than the first threshold, the control unit 36 ​​determines that the door 40 is open, and proceeds to the process in step S3. This is because, when the RFID tag 10 is not facing the RFID antenna 21, the tag ID of the RFID tag 10 may be received via the RFID antenna 21 even though the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 is weak. In the control unit 36, the first threshold for the reception strength for determining that the RFID tag 10 is not facing the RFID antenna 21 is set in advance by being specified by the operation unit 32 or received via the wireless communication unit 34, and is stored in the storage unit 38.

[0042] On the other hand, if the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 is greater than or equal to the first threshold, the control unit 36 ​​determines that the RFID tag 10 and the RFID antenna 21 are facing each other and the door 40 is closed.

[0043] Then, the control unit 36 ​​notifies the user that the door 40 is closed by displaying the information on the display unit 33 or by transmitting the information to the server device 70 (described later) via the wireless communication unit 34 (step S5).

[0044] Thus, in this embodiment, the RFID antenna 21 is disposed in the troyoke 51, and the RFID tag 10 is disposed at the end 47 of the door 40 that faces the troyoke 51 when the door 40 is closed. Therefore, communication between the RFID tag 10 and the RFID antenna 21 is possible only when the door 40 is closed. Then, the open / closed state of the door can be detected with high accuracy depending on whether the tag ID can be read from the RFID tag 10 via the RFID antenna 21. Even if the tag ID can be read from the RFID tag 10 via the RFID antenna 21, if the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is less than the first threshold, it is determined that the door 40 is open. This allows the open / closed state of the door to be detected with even higher accuracy.

[0045] System Configuration FIG. 8 is a diagram showing an example of a system using the RFID reader 20 shown in FIG.

[0046] 8, RFID readers 20-1 to 20-n attached to fittings 50 are connected to a gateway 60 by wireless communication such as Wi-Fi or LoRa via a wireless communication unit 34. The gateway 60 is also connected to a server device 70 on the network.

[0047] The RFID readers 20-1 to 20-n periodically transmit the determination result of the open / closed state of the door to the server device 70 on the network via the gateway 60. The RFID readers 20-1 to 20-n may also transmit the determination result of the open / closed state of the door to the server device 70 on the network via the gateway 60 at the timing when the open / closed state of the door changes.

[0048] FIG. 9 is a diagram showing an example of a configuration of the server device 70 shown in FIG.

[0049] The server device 70 shown in FIG. 8 includes a communication unit 71, a detection information storage unit 72, a display information generation unit 73, and a setting information storage unit 74, as shown in FIG.

[0050] The communication unit 71 is connected to the Internet or the like, and receives the determination result of the open / closed state of the door transmitted from the RFID readers 20-1 to 20-n as the detection result of the open / closed state of the door via the gateway 60. In addition, the communication unit 71 transmits the setting values ​​stored in the setting information storage unit 74 in response to a request from the RFID readers 20-1 to 20-n.

[0051] The detection information storage unit 72 stores the detection results of the open / closed state of the door received and collected via the communication unit 71.

[0052] The display information generating unit 73 processes the detection result of the open / closed state of the door, which is received and collected via the communication unit 71, into, for example, a WEB page or the like to generate information that can be displayed on a browser, etc. The display information generating unit 73 also generates a WEB page or the like having an input screen for setting the transmission strength of radio waves from the RFID antenna 21 and the reception strength of radio waves via the RFID antenna 21, which is a threshold for determining the open / closed state of the door 40.

[0053] The setting information storage unit 74 stores a setting value of the transmission strength of the radio waves from the RFID antenna 21 and a setting value of a threshold value for determining whether the door 40 is open or closed.

[0054] In the server device 70 configured as described above, when the determination result of the open / closed state of the door transmitted from the RFID readers 20-1 to 20-n is received by the communication unit 71, the received determination result of the open / closed state of the door is collected as detection information and stored in the detection information storage unit 72.

[0055] Thereafter, the display information generating unit 73 processes the detection result of the open / closed state of the door into, for example, a Web page, and generates information that can be displayed on a browser or the like.

[0056] This makes it possible to view the open / closed status of the door on a web page, etc.

[0057] In addition, by displaying the input screen generated by the display information generation unit 73 on a terminal such as a PC, it is possible to set the transmission strength of radio waves from the RFID antenna 21 and the reception strength of radio waves via the RFID antenna 21, which serves as a threshold for determining the open / closed state of the door 40.

[0058] Then, the transmission strength of radio waves from the RFID antenna 21 and the reception strength of radio waves via the RFID antenna 21, which serve as a threshold for determining the open / closed state of the door 40, set using the input screen generated by the display information generation unit 73, are stored in the setting information storage unit 74.

[0059] The transmission strength and reception strength of the radio waves stored in the setting information storage unit 74 are transmitted to the RFID readers 20-1 to 20-n via the gateway 60 in response to a request from the RFID readers 20-1 to 20-n. The RFID readers 20-1 to 20-n request the setting values ​​of the transmission strength and reception strength periodically or when detecting the open / closed state of the door.

[0060] When the requested setting values ​​are transmitted from the server device 70, the RFID readers 20-1 to 20-n update the setting values ​​stored in the memory unit 38 using the setting values ​​transmitted from the server device 70 under the control of the control unit 36.

[0061] (Other embodiments) <Installation of door opening / closing sensor 1> FIG. 10 is a diagram showing another example of the installation form of the RFID tag 10 shown in FIG.

[0062] 10, unlike that shown in FIG 3, the deadbolt 44 having the RFID tag 10 attached to its tip protrudes from the end 47 of the door 40 when the door 40 is locked. The RFID tag 10 can be attached to the deadbolt 44 using double-sided tape or the like.

[0063] <Door opening / closing sensor operation> The operation of the door opening / closing sensor in the installation form shown in FIG. 10 will be described below.

[0064] FIG. 11 is a flowchart for explaining an example of the operation of the door opening / closing sensor in the installation form shown in FIG.

[0065] With the RFID tag 10 attached to the door 40 as shown in Fig. 10 and the RFID reader 20 attached to the door frame 52 as shown in Fig. 4, the RFID reader 20 reads the tag ID from the RFID tag 10 (step S11). The tag ID is read by the control unit 36 ​​instructing the RFID reader unit 31 to read the tag ID from the RFID tag 10. It is preferable to read the tag ID periodically, for example, every 100 ms. When the RFID reader unit 31 receives a read instruction from the control unit 36, it transmits an instruction to the RFID tag 10 to transmit its own tag ID via the RFID antenna 21.

[0066] 10, when the door 40 is not completely closed, the RFID tag 10 does not face the RFID antenna 21, as described above. Therefore, even if a command to transmit the tag ID of the RFID tag 10 is transmitted via the RFID antenna 21, the tag ID of the RFID tag 10 is not read by the RFID reader 20. In addition, at this time, the RFID tag 10 has not passed through the end of the guardrail 51, and since the guardrail 51 is made of a radio wave shielding material such as metal, the radio wave shielding material is interposed between the RFID tag 10 and the RFID antenna 21. Therefore, the RFID reader 20 cannot communicate with the RFID tag 10 via the RFID antenna 21.

[0067] The control unit 36 ​​determines that the door 40 is open when a command to transmit the tag ID of the RFID tag 10 is transmitted via the RFID antenna 21 but the tag ID of the RFID tag 10 is not received via the RFID antenna 21 (step S12).

[0068] Then, the control unit 36 ​​notifies the server device 70 that the door 40 is open by displaying the information on the display unit 33 or transmitting the information to the server device 70 via the wireless communication unit 34 (step S13).

[0069] On the other hand, when the tag ID of the RFID tag 10 is received via the RFID antenna 21, the control unit 36 ​​judges whether the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 is equal to or greater than the first threshold value A (step S14). This first threshold value A is preset in the control unit 36 ​​by being specified via the operation unit 32 or received via the wireless communication unit 34, and is stored in the storage unit 38.

[0070] When the reception strength of the radio wave from the RFID tag 10 through the RFID antenna 21 is less than the first threshold A, the control unit 36 ​​determines that the door 40 is open, and proceeds to the process in step S13. This is because, when the RFID tag 10 is not facing the RFID antenna 21, the tag ID of the RFID tag 10 may be received through the RFID antenna 21, even though the reception strength of the radio wave from the RFID tag 10 through the RFID antenna 21 is weak. Therefore, in the control unit 36, the first threshold A for the reception strength for determining that the RFID tag 10 is not facing the RFID antenna 21 is preset by being specified through the operation unit 32 or received through the wireless communication unit 34. The set first threshold A is stored in the storage unit 38 by the control unit 36.

[0071] On the other hand, when the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is equal to or greater than the first threshold A, the control unit 36 ​​determines that the door 40 is closed. Then, it is determined whether or not the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is equal to or greater than the second threshold B (step S15). This second threshold B is preset in the control unit 36 ​​by being specified by the operation unit 32 or received by the server device 70 via the wireless communication unit 34, and is stored in the storage unit 38. Note that the second threshold B is used to determine whether the door 40 is in a locked state, as described later. Therefore, it is a value larger than the first threshold A for determining whether the door 40 is open or closed.

[0072] FIG. 12 is a diagram showing a state in which the door 40 is locked in the configuration shown in FIG.

[0073] As described above, in this embodiment, the RFID tag 10 is attached to the tip of the deadbolt 44, and the deadbolt 44 protrudes from the end 47 of the door 40 when the door 40 is in the locked state.

[0074] Therefore, when the door 40 is in an unlocked state, the distance between the RFID tag 10 and the RFID antenna 21 is equal to the depth of the door lock 51, as shown in FIG. 12(a).

[0075] On the other hand, when the door 40 is in a locked state, the deadbolt 44 protrudes from the end 47 of the door 40, bringing the RFID tag 10 and the RFID antenna 21 into close proximity to each other, as shown in FIG. 12(b).

[0076] Therefore, the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is greater when the door 40 is in a locked state, that is, when the door 40 is not locked, than when the door 40 is in an unlocked state, that is, when the door 40 is not locked.

[0077] Therefore, when the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21 is equal to or greater than the second threshold value B, the control unit 36 ​​determines that the door 40 is closed and locked.

[0078] Then, the control unit 36 ​​notifies the server device 70 that the door 40 is closed and locked by displaying the same on the display unit 33 or by transmitting a notification to the server device 70 via the wireless communication unit 34 (step S16).

[0079] On the other hand, if the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 is less than the second threshold, the control unit 36 ​​determines that the door 40 is closed but not locked, that is, it is in an unlocked state.

[0080] Then, the control unit 36 ​​notifies the server device 70 that the door 40 is closed but unlocked by displaying the same on the display unit 33 or transmitting the same to the server device 70 via the wireless communication unit 34 (step S17).

[0081] In this manner, in this embodiment, the RFID tag 10 is attached to the tip of the deadbolt 44, the distance of which changes between the locked and unlocked states of the door 40 and the RFID antenna 21 disposed in the locking mechanism 51. Therefore, by utilizing the fact that the reception strength of the radio waves from the RFID tag 10 via the RFID antenna 21 changes between the locked and unlocked states of the door 40, it is possible to determine whether the door 40 is locked or unlocked.

[0082] <Transmission strength and threshold update process> The process of updating the transmission strength of the radio wave from the RFID antenna 21 and the above-mentioned thresholds A and B will be described below.

[0083] FIG. 13 is a flowchart for explaining the process of updating the thresholds A and B for the transmission strength of the radio wave from the RFID antenna 21 and the reception strength of the radio wave from the RFID tag 10 via the RFID antenna 21.

[0084] The first threshold A and the second threshold B for the transmission strength of radio waves from the RFID antenna 21 and the reception strength of radio waves from the RFID tag 10 via the RFID antenna 21 can be set via the operation unit 32 of the reader main body 30 or from the server device 70.

[0085] When setting from the server device 70, the server device 70 displays an input screen generated by the display information generating unit 73 on a terminal such as a PC. This makes it possible to set the transmission strength of radio waves from the RFID antenna 21 and the reception strength of radio waves via the RFID antenna 21, which is the threshold for determining whether the door 40 is open or closed.

[0086] The RFID reader 20 periodically or when detecting the open / closed state of the door, requests the server device 70 for the set values ​​of the transmission intensity and the reception intensity.

[0087] When the RFID reader 20 receives a set value from the server device 70, first, the control unit 36 ​​determines whether the received set value is the first threshold value A for determining whether the door 40 is open or closed (step S21).

[0088] Then, if the received setting value is the first threshold value A for determining whether the door 40 is open or closed, the control unit 36 ​​updates the first threshold value A stored in the memory unit 38 to the received setting value (step S22).

[0089] On the other hand, if the received setting value is not the first threshold value A for determining the open / closed state of the door 40, the control unit 36 ​​next determines whether the received setting value is the second threshold value B for determining the locked state of the door 40 (step S23).

[0090] Then, if the received setting value is the second threshold value B for determining the locked state of the door 40, the control unit 36 ​​updates the second threshold value B stored in the memory unit 38 to the received setting value (step S24).

[0091] On the other hand, if the received setting value is not the second threshold value B for determining the locked state of the door 40, the control unit 36 ​​next determines whether the received setting value is the transmission strength of the radio waves from the RFID antenna 21 (step S25).

[0092] Then, if the received setting value is the transmission strength of radio waves from the RFID antenna 21, the control unit 36 ​​updates the transmission strength of radio waves from the RFID antenna 21 stored in the memory unit 38 to the received setting value (step S26).

[0093] In this manner, it is possible to update the first threshold value A for determining whether the door 40 is open or closed, the second threshold value B for determining the locked state, and the transmission strength of the radio wave from the RFID antenna 21. This makes it possible to set these values ​​in accordance with the positional relationship between the RFID antenna 21 and the RFID tag 10 and the difference in radio wave reception strength due to the shape of the door 40, etc.

[0094] Other System Embodiments FIG. 14 is a diagram showing another example of a system using the RFID reader 20 shown in FIG.

[0095] As shown in FIG. 14, the system in this embodiment further includes an information processing device 80 in addition to the system shown in FIG.

[0096] FIG. 15 is a diagram showing an example of a configuration of the information processing device 80 shown in FIG.

[0097] The information processing device 80 shown in FIG. 14 may be composed of a general PC or the like, and may have a configuration having a communication unit 81, a data analysis unit 82, a display unit 83, an analysis result output control unit 84, a monitoring unit 85, and an operation unit 86, as shown in FIG. 15.

[0098] The communication unit 81 communicates with the server device 70 via a communication line such as the Internet.

[0099] The data analysis unit 82 is an example of an analysis means in the present invention, and receives the determination results of the door open / closed state collected by the server device 70 via the communication unit 81, and analyzes the door open / closed state.

[0100] The display unit 83 is an example of the output means in the present invention, and displays the door open / close state received via the communication unit 81 and the analysis results in the data analysis unit 82.

[0101] The analysis result output control unit 84 causes the display unit 83 to display the analysis results from the data analysis unit 82 .

[0102] The monitoring unit 85 monitors the open / closed state of the door received via the communication unit 81, and displays it on the display unit 83. The monitoring unit 85 also determines that an abnormal state has occurred in the open / closed state or the locking state of the door, and activates an alarm means such as an alarm device 90 arranged in the facility by sending an alarm signal to the alarm means, which then generates an alarm sound in the surrounding area.

[0103] The operation unit 86 is composed of a keyboard, a mouse, a touch panel, or the like, and is used to input information to the information processing device 80.

[0104] In the information processing device 80 configured as described above, it is possible to monitor the door opening / closing state collected by the server device 70, and also possible to analyze the door opening / closing state.

[0105] In this case, first, the operation unit 86 is operated to access the server device 70 via a communication line, and a web page or the like is displayed on the display unit 83 using a browser or the like.

[0106] Next, the door open / close status is acquired from the server device 70 using a Web page or the like.

[0107] When the door open / close state is acquired from the server device 70, the door open / close state can be displayed on the display unit 83 and analyzed by operating the operation unit 86.

[0108] When displaying the open / closed state of the door on the display unit 83, by specifying this via the operation unit 86, the open / closed state of the door is displayed on the display unit 83 under the control of the monitoring unit 85. This makes it possible to install door open / close sensors on the entrances or interior doors of buildings such as office rooms, hotel guest rooms, factories, stores, warehouses, etc., and to monitor the open / closed state and lock state of each door.

[0109] In addition, when analyzing the door opening / closing state, when the user designates the same via the operation unit 86, the data analysis unit 82 first analyzes the door opening / closing state acquired from the server device 70. The analysis in the data analysis unit 82 may be performed based on, for example, the location where the door opening / closing sensor is installed and the time when the door is opened and closed. The analysis result in the data analysis unit 82 can be displayed on the display unit 83. In this case, when the user designates the same via the operation unit 86, the analysis result in the data analysis unit 82 is displayed on the display unit 83 under the control of the analysis result output control unit 84. This makes it possible to analyze, for example, the number of times each door on which a door opening / closing sensor is installed is opened and closed, and to grasp the frequency of use of an office conference room or a hotel room, or to grasp the flow of people in a building such as an office. In addition, a report on the analysis result can be output.

[0110] <System application examples> (Application example 1) When the door opening / closing sensor 1 is installed at the entrance of an office or hotel room (an employee's room, a conference room, a guest room, etc.), the monitoring unit 85 can monitor whether the door of each room has been left unlocked or not.

[0111] (Application example 2) When the door opening / closing sensor 1 is installed at an entrance / exit from outside a facility such as an office, warehouse, or factory, it can automatically detect the intrusion of a suspicious person from outside when no employees are present, and the monitoring unit 85 can activate an alarm 90 installed in the facility to sound an alarm.

[0112] (Application example 3) As an example of utilizing the opening / closing information data from one or more opening / closing detection devices installed in a facility, the data analysis unit 82 may use the data in combination with other data to analyze, for example, the frequency of use of hotel guest rooms or office conference rooms, or to analyze the flow of people within the facility.

[0113] In the above-described embodiment, the RFID antenna 21 is disposed and attached in the troyoke 51, and the RFID tag 10 is disposed and attached to the end 47 of the door 40 that faces the inside of the troyoke 51 when the door 40 is closed. However, the RFID tag 10 may be disposed and attached in the troyoke 51, and the RFID antenna 21 may be disposed and attached to the end 47 of the door 40 that faces the inside of the troyoke 51 when the door 40 is closed. However, by adopting the configuration as in this embodiment, it is not necessary to attach a cable for connecting the reader body 30 and the RFID antenna 21 and a power line for supplying power to the reader body 30 to the door 40 that opens and closes.

[0114] Each function of the above-described embodiments can be realized by one or more processing circuits. Here, the term "processing circuit" in this specification includes a processor programmed to execute each function by software, such as a processor implemented by an electronic circuit, and a device such as an ASIC (Application Specific Integrated Circuit), a DSP (digital signal processor), an FPGA (field programmable gate array), or a conventional circuit module designed to execute each function described above.

[0115] In addition, the present invention is not limited to the configurations shown here, such as combinations of the configurations and the like described in the above embodiments with other elements, etc. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

[0116] For example, aspects of the present invention are as follows. (Appendix 1) An opening / closing detection sensor that detects the opening / closing state of a movable part that opens and closes with respect to a frame body to which a troyoke is attached, A wireless tag; an antenna for communicating with the wireless tag via radio waves; One of the wireless tag and the antenna is disposed within the trolley; An opening / closing detection sensor in which the other of the wireless tag and the antenna is arranged at the end of the movable part that faces the inside of the troyoke when the movable part is closed. (Appendix 2) The antenna is disposed within the trousers, 2. The open / close detection sensor according to claim 1, wherein the wireless tag is disposed at an end of the movable part. (Appendix 3) 3. The open / close detection sensor according to claim 1, further comprising a control unit that determines that the movable part is open when the reception strength of radio waves from the wireless tag via the antenna is less than a first threshold value. (Appendix 4) 4. The open / close detection sensor according to claim 3, wherein the first threshold is variable. (Appendix 5) a deadbolt disposed at an end of the movable part and projecting from the end when the movable part is in a locked state; One of the wireless tag and the antenna is disposed within the trolley; 5. The opening / closing detection sensor according to any one of claims 1 to 4, wherein the other of the wireless tag and the antenna is disposed at a tip of the deadbolt. (Appendix 6) The open / close detection sensor according to claim 5, further comprising a control unit that determines that the movable part is in a locked state when the reception strength of the radio waves from the wireless tag via the antenna is equal to or greater than a second threshold value. (Appendix 7) 7. The open / close detection sensor according to claim 6, wherein the second threshold is variable. (Appendix 8) 8. The open / close detection sensor according to claim 1, wherein the transmission strength of the radio wave from the antenna is variable. (Appendix 9) A system having an open / close detection sensor according to claim 3 or 6, The open / close detection sensor has a communication means for wirelessly transmitting a determination result in the control unit, moreover, The system further comprises a server device that receives the determination result wirelessly transmitted by the communication means. (Appendix 10) 10. The system of claim 9, wherein the communication means is located outside the troyoke. (Appendix 11) the server device transmits a setting value stored in the open / close detection sensor to the open / close detection sensor; 11. The system according to claim 9, wherein the control unit updates the stored setting value using the setting value transmitted from the server device. (Appendix 12) the server device transmits a threshold value of a reception strength for determining a state of the movable part by the open / close detection sensor as the setting value to the open / close detection sensor; The system described in Appendix 11, wherein the control unit updates the stored threshold value using the threshold value transmitted from the server device. (Appendix 13) an information processing device capable of communicating with the server device; The system according to any one of claims 9 to 12, wherein the information processing device has an output unit that outputs the determination result received by the server device. (Appendix 14) an information processing device capable of communicating with the server device; The system according to any one of claims 9 to 12, wherein the information processing device has an analysis means for performing analysis using the determination result received by the server device. (Appendix 15) an information processing device capable of communicating with the server device; the information processing device has a monitoring unit that monitors an open / closed state of the movable part relative to the frame body based on a determination result received by the server device, 13. The system according to any one of claims 9 to 12, wherein the monitoring unit determines that an abnormal condition has occurred when an open / closed state of the movable part changes. (Appendix 16) 16. The system according to claim 15, wherein the monitoring unit activates an alarm means for issuing an alert when it determines that the abnormal state has occurred. [Explanation of symbols]

[0117] 1 Door open / close sensor 10 RFID Tags 20,20-1~20-n RFID Reader 21 RFID antenna 30 Reader body 31 RFID reader section 32,86 Operation unit 33,83 Display section 34 Wireless Communication Section 35 Communication Antenna 36 Control Unit 37 Power supply section 38 Memory section 40 Doors 41 Door Handle 42 Thumb turn 43 Latch bolt 44 Deadbolt 45 cases 46 Strike 47 End 50 Doors and windows 51 Toroyoke 52 Door and window frames 60 Gateway 70 Server equipment 71,81 Communications Department 72 Detection information storage unit 73 Display information generation section 74 Setting information storage unit 80 Information processing device 82 Data Analysis Department 84 Analysis result output control section 85 Monitoring Department 90 alarm [Prior art documents] [Patent documents]

[0118] [Patent Document 1] JP 2015-021282 A [Patent Document 2] JP 2014-196639 A [Patent Document 3] JP 2023-004418 A

Claims

1. An opening / closing detection sensor that detects the opening / closing state of a movable part that opens and closes with respect to a frame body to which a troyoke is attached, A wireless tag; an antenna for communicating with the wireless tag via radio waves; One of the wireless tag and the antenna is disposed within the trolley; An opening / closing detection sensor in which the other of the wireless tag and the antenna is arranged at the end of the movable part that faces the inside of the troyoke when the movable part is closed.

2. The antenna is disposed within the trousers, The open / close detection sensor according to claim 1 , wherein the wireless tag is disposed at an end of the movable part.

3. The open / close detection sensor according to claim 1 , further comprising a control unit that determines that the movable part is open when a reception strength of the radio wave from the wireless tag via the antenna is less than a first threshold value.

4. The open / close detection sensor according to claim 3 , wherein the first threshold value is variable.

5. a deadbolt disposed at an end of the movable part and projecting from the end when the movable part is in a locked state; One of the wireless tag and the antenna is disposed within the trolley; The open / close detection sensor according to claim 1 , wherein the other of the wireless tag and the antenna is disposed at a tip of the deadbolt.

6. The open / close detection sensor according to claim 5 , further comprising a control unit that determines that the movable part is in a locked state when a reception strength of the radio wave from the wireless tag via the antenna is equal to or greater than a second threshold value.

7. The open / close detection sensor according to claim 6 , wherein the second threshold value is variable.

8. The open / close detection sensor according to claim 1 , wherein the transmission intensity of the radio wave from the antenna is variable.

9. A system having the open / close detection sensor according to claim 3 or 6, The open / close detection sensor has a communication means for wirelessly transmitting a determination result in the control unit, moreover, The system further comprises a server device that receives the determination result wirelessly transmitted by the communication means.

10. The system of claim 9 , wherein the communication means is located outside the troyoke.

11. the server device transmits a setting value stored in the open / close detection sensor to the open / close detection sensor; 10. The system according to claim 9, wherein the control unit updates the stored setting value using the setting value transmitted from the server device.

12. the server device transmits a threshold value of a reception strength for determining a state of the movable part by the open / close detection sensor as the setting value to the open / close detection sensor; The system according to claim 11 , wherein the control unit updates the stored threshold value using the threshold value transmitted from the server device.

13. an information processing device capable of communicating with the server device; 10. The system according to claim 9, wherein the information processing device comprises an output unit that outputs the determination result received by the server device.

14. an information processing device capable of communicating with the server device; The system according to claim 9 , wherein the information processing device comprises an analysis unit that performs an analysis using the determination result received by the server device.

15. an information processing device capable of communicating with the server device; the information processing device has a monitoring unit that monitors an open / closed state of the movable part relative to the frame body based on a determination result received by the server device, The system according to claim 9 , wherein the monitoring unit determines that an abnormal state has occurred when the open / closed state of the movable part changes.

16. The system according to claim 15 , wherein the monitoring unit activates an alarm means for issuing an alert when it determines that the abnormal state has occurred.

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