Door control system

Abstract

To provide a door control system capable of supporting hands-free operation and allowing only a user having duly authority to perform locking / unlocking and other operations of a door.SOLUTION: In a door control system 1 that locks / unlocks a door D by causing an authentication unit 32 to authenticate unique identification information involved in an unlocking device 6, a pair of distance measuring devices 42, 52 that measures a distance to the unlocking device 6 by wireless communication is disposed inside and outside the door D, and the measurement results of the distance measuring devices 42, 52 are compared by a position determination unit 34 to determine whether the unlocking device 6 is present inside or outside the door D. Reflecting the result of the position determination in locking / unlocking control of the door D prevents malfunction of the electric lock unit 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a door control system, and more particularly to a door control system capable of locking / unlocking or opening / closing a door in a hands-free manner. [Background technology]

[0002] In recent years, keyless door control systems that allow doors to be locked, unlocked, or opened and closed without using a physical key have been proposed for hotel guest room doors, apartment front doors, and condominium entrance doors, and door control systems that allow doors to be locked, unlocked, or opened and closed hands-free have been attracting particular attention recently.

[0003] In a hands-free door control system, for example, a user carries an authentication medium such as a remote control key, and a reading device capable of wireless communication with the authentication medium is placed on the door side. When the user enters within the wireless communication range of the reading device, wireless communication is established between the authentication medium and the reading device, and the unique identification information stored in the authentication medium is read by the reading device. The read identification information is input to the authentication device on the door side, and the user authentication is performed by comparing it with registered information registered in advance in the authentication device. If the user authentication is successful, the door is locked / unlocked or the door is opened / closed.

[0004] However, while such hands-free door control systems are highly convenient, there is a risk that, for example, when an authentication medium is inside the door, the authentication medium inside the room will respond to a response request signal from a reading device outside the door and transmit identification information, which could lead to the door being illegally locked or unlocked.

[0005] Patent Document 1 shows a door control system that can prevent such unauthorized locking and unlocking of a door. In this door control system, identification information reading devices are arranged inside and outside the door, and a jamming device is arranged inside the door, which transmits a jamming signal to invalidate a response request signal while the response request signal is being transmitted by the reading device outside the door. This prevents the authentication medium inside the door from transmitting identification information in response to the response request signal transmitted by the reading device outside the door. When both the reading devices inside and outside the door receive an identification signal from the authentication medium, the reception strength of the identification information received by each reading device is compared, and it is determined that the authentication medium is present on the side with the stronger reception strength. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2022-42687 Summary of the Invention [Problem to be solved by the invention]

[0007] However, such conventional door control systems have the following problems, and improvements thereto are desired.

[0008] That is, in the door control system shown in Patent Document 1, when both the reading devices inside and outside the door receive the identification information, the position of the authentication medium is determined based on the strength of the reception strength, so there is a risk that the position of the authentication medium may be misidentified by a fake signal such as a relay attack. Also, since the correlation between the position of the authentication medium and the reception strength is relatively unstable, if the determination was made only based on the reception strength, there is a possibility that locking or unlocking may be performed erroneously even though the authentication medium is located in a position where it should not be performed.

[0009] In addition, the door control system shown in Patent Document 1 has a problem in that the cost of the entire system increases because a jamming device that transmits a jamming signal is installed. Furthermore, because the jamming signal is transmitted not only to the inside of the door but also to the outside of the door, the signal strength cannot be increased, and the range in which the jamming device can disable the response request signal is limited to a very short distance.

[0010] The present invention has been made in consideration of these problems, and its purpose is to provide a door control system that is hands-free and allows only users with proper authority to lock and unlock the door. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object, the door control system of the present invention is a door control system that locks and unlocks a door or controls the opening and closing of the door by authenticating unique identification information held by an authentication medium, and is characterized in having a pair of distance measuring means that are arranged in the vicinity of the door and measure the distance to the authentication medium by wireless communication with the authentication medium, and a position determination means that determines the position of the authentication medium based on the measurement results of the pair of distance measuring means.

[0012] In this door control system, a pair of distance measuring means arranged near the door wirelessly communicate with the authentication medium, and each measures the distance to the authentication medium. The position determining means determines the position of the authentication medium using the measurement results of the pair of distance measuring means, i.e., the distance information to the authentication medium measured by each distance measuring means. For example, when the distance measuring means are arranged inside and outside the door, the position determining means determines that the authentication medium is present on the side (inside or outside) where the distance measuring means that obtained the shorter distance information is arranged. In this way, the door control system of the present invention determines the position of the authentication medium based on the distance information, so that the position of the authentication medium can be accurately determined without being affected by unstable radio wave intensity. Therefore, according to the door control system of the present invention, the system side can accurately grasp the position of the user who possesses the authentication medium, and it is possible to effectively prevent unauthorized locking and unlocking of the door.

[0013] In a preferred embodiment of the door control system of the present invention, the pair of distance measuring means are arranged on the inside and outside of the door, respectively, and the position determination means determines whether the authentication medium is located on the inside or outside of the door by comparing the measurement results of the pair of distance measuring means.

[0014] In this door control system, the distance measuring means are disposed on the inside and outside of the door. Therefore, by comparing the distances to the authentication medium measured by each distance measuring means, it is possible to identify whether the authentication medium is located inside or outside the door. Therefore, according to this embodiment, it is possible to provide a door control system suitable for locking, unlocking, and opening and closing hotel guest room doors and residence front doors.

[0015] In addition, as another preferred embodiment of the door control system of the present invention, the pair of distance measuring means are arranged at a predetermined distance in front and behind the outside of the door, and the position determination means determines whether the authentication medium is located in front of or behind the distance measuring means by comparing the measurement results of the pair of distance measuring means.

[0016] In this door control system, the distance measuring means are placed on the outside of the door at a predetermined interval in front and behind. Therefore, by comparing the distances to the authentication medium measured by each distance measuring means, it is possible to identify whether the authentication medium is in front or behind the distance measuring means. Therefore, according to this embodiment, it is possible to provide a door control system suitable for locking, unlocking, and opening and closing the entrance door of an apartment building, etc.

[0017] In addition, as another preferred embodiment of the door control system of the present invention, the distance measuring means measures the distance to the authentication medium by two-way ranging (TWR) using ultra-wideband (UWB) communication with the authentication medium.

[0018] In this door control system, the distance between the distance measuring means and the authentication medium is measured by a two-way distance measuring method using ultra-wideband communication, so the distance to the authentication medium can be measured accurately. In addition, ultra-wideband communication is less likely to interfere with other communications (e.g., wireless radio waves such as wireless LAN and NFC) and can measure distance with low power consumption. Therefore, it is possible to provide a door control system that is suitable for use in an environment where other communications such as wireless LAN are performed and that is suitable for operation with a power source other than a commercial power source (e.g., a battery).

[0019] In addition, as another preferred embodiment of the door control system according to the present invention, the position determination means determines the position of the authentication medium by a phase difference of arrival (PDoA) method based on the phase difference of the received radio waves at the pair of distance measuring means.

[0020] In this door control system, the position of the authentication medium is identified by the arrival phase difference method, so the position of the authentication medium can be identified accurately. Therefore, for example, at the entrance door of an apartment building where the surrounding traffic lines can be complicated, the position of the user who possesses the authentication medium can be identified accurately, and a door control system can be provided in which only users with proper authority can lock and unlock the door or control the opening and closing of the door. Effect of the Invention

[0021] According to the present invention, since the position of the authentication medium is determined based on distance information to the authentication medium measured by a pair of distance measuring means arranged near the door, the position of the user carrying the authentication medium can be accurately determined. Therefore, in a door control system for locking / unlocking or opening / closing the door hands-free, it is possible to effectively prevent unauthorized locking / unlocking or opening / closing of the door without using a radio wave jamming device. [Brief description of the drawings]

[0022] [Figure 1] 1 is a block diagram showing an example of a schematic configuration of a door control system according to the present invention; [Diagram 2]FIG. 13 is a schematic diagram showing an example of the door control system applied to the entrance door of a residence. [Diagram 3] 11 is an explanatory diagram showing an example of inside / outside determination, which is a position determination of an authentication medium by the door control system. FIG. [Figure 4] FIG. 13 is a schematic diagram showing an example of the configuration in which the door control system is applied to an entrance door of an apartment building. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of a door control system according to the present invention will be described in detail with reference to the drawings. In this specification and the drawings, components having substantially the same functional configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0024] EMBODIMENT 1 Fig. 1 shows a schematic configuration of the door control system according to the present invention. The door control system 1 shown in the figure shows a case where the system is applied to locking and unlocking control of the front door of a residence, and includes an electric lock unit 2, a control unit 3, an outdoor unit 4, an indoor unit 5, and an unlocking device 6 as main components.

[0025] The electric lock unit 2 is a unit that receives a predetermined electric signal (locking / unlocking signal) to lock and unlock the door D (see Figure 2), and has an electric lock mechanism 21 including a deadbolt (not shown), a drive unit 22 that drives the deadbolt, and an operation unit 23 for manually operating the deadbolt.

[0026] The electric lock mechanism 21 is housed inside the door D, and locks the door D by projecting a deadbolt from the end of the door D on the door leading side. That is, the door D is locked by the deadbolt projecting from the end of the door leading side engaging with a strike (not shown) provided on the door frame. In contrast, the door D is unlocked by retracting the deadbolt in the projecting state into the door and releasing the engagement between the deadbolt and the strike. The drive unit 22 is composed of an actuator (for example, an electric motor) that operates by receiving power supply from the power supply unit 35 of the control unit 3. The drive unit 22 is linked to the electric lock mechanism 21, and the deadbolt projects / retracts from the end of the door D on the door leading side by the operation of the drive unit 22. The operation unit 23 is a part for operating the electric lock mechanism 21 without using the drive unit 22, and is composed of, for example, a thumb turn 24 (see FIG. 2) arranged on the inside of the door D.

[0027] The control unit 3 is a unit that controls the electric lock unit 2, and its main parts include an electric lock control unit 31 that outputs a lock / unlock signal to the drive unit 22, an authentication unit 32 that performs user authentication of the unlocking device 6, a memory unit 33 that stores registration information for user authentication, a position determination unit 34 that determines the position of the unlocking device 6, and a power supply unit 35.

[0028] The control unit 3 is housed in a predetermined casing arranged, for example, on the inside (room side) of the door D. The control unit 3 is equipped with a microcomputer (not shown), and the functions of the electric lock control unit 31, the authentication unit 32, and the position determination unit 34 are realized by a program of this microcomputer. The storage unit 33 is configured by the memory of this microcomputer.

[0029] The electric lock control unit 31 outputs a lock / unlock signal to the drive unit 22 of the electric lock unit 2 under certain conditions, such as when the user authentication in the authentication unit 32 is successful (details will be described later). The authentication unit 32 performs user authentication by comparing the identification information sent from the unlocking device 6 with identification information for matching registered in advance in the storage unit 33. That is, if identification information matching the identification information sent from the unlocking device 6 is registered in the storage unit 33, it is determined that the user authentication is successful, and if matching identification information is not registered in the storage unit 33, it is determined that the user authentication is unsuccessful. The above-mentioned identification information for user authentication is stored and registered in the storage unit 33.

[0030] The position determination unit 34 determines the position of the unlocking device 6 based on the measurement results of the distance measuring devices 42, 52 described later. This position determination includes, for example, an inside / outside determination as to whether the unlocking device 6 is located inside or outside the door D, as well as a detailed position determination that specifically specifies the position (coordinates) where the unlocking device 6 is located (details will be described later). The power supply unit 35 is a power supply device that supplies power to the electric lock unit 2, the control unit 3, the outdoor unit 4, and the indoor unit 5, and a battery such as a dry cell is preferably used as the power supply.

[0031] The outdoor unit 4 and the indoor unit 5 are units for reading the unique identification information stored in the unlocking device 6, and in this embodiment, the outdoor unit 4 is provided on the outside of the door D, and the indoor unit 5 is provided on the inside of the door D, with the door D in between. Each unit 4, 5 is provided with a reading device 41, 51 that reads the identification information of the unlocking device 6, and a distance measuring device 42, 52 that measures the distance to the unlocking device 6.

[0032] The reading devices 41, 51 are configured with devices capable of wireless communication with the unlocking device 6. In this embodiment, devices compatible with BLE: Bluetooth Low Energy ("Bluetooth" is a registered trademark) and NFC: Near field communication are used as the reading devices 41, 51, and the identification information stored in the unlocking device 6 is read by the reading devices 41, 51 via BLE or NFC communication. In this embodiment, the thumb turn 24 constituting the operation unit 23 of the electric lock mechanism 21 is disposed inside the door D, so the reading device 51 on the inside of the door may be omitted.

[0033] The distance measuring devices 42, 52 are distance measuring devices using ultra-wide band (UWB) communication, and in this embodiment, the unlocking device 6 is treated as a tag to be measured, and a pair of distance measuring devices 42, 52 installed inside and outside the door D are used as anchors that are the reference for distance measurement to measure distance by a two-way ranging (TWR) method. Since the TWR method is well known, detailed explanation is omitted, but the distance measuring devices 42, 52 each measure the propagation time of a pulse signal transmitted and received by UWB communication with the unlocking device 6, and the measured propagation time is multiplied by the speed of light to measure the distance from each of the distance measuring devices 42, 52 to the unlocking device 6.

[0034] Here, in the distance measuring devices 42, 52, the communication antennas (not shown) that perform UWB communication with the unlocking device 6 are arranged so that the distance measuring device 42 of the outdoor unit 4 faces outward (toward the outside of the room) and the distance measuring device 52 of the indoor unit 5 faces inward (toward the inside of the room). That is, the antennas of the distance measuring device 42 of the outdoor unit 4 and the distance measuring device 52 of the indoor unit 5 are arranged so that their rear sides face each other across the door D. In this arrangement, the distance measuring devices 42, 52 are arranged with a predetermined distance L (see FIG. 3) between them.

[0035] The unlocking device 6 is an authentication medium that has unique identification information for user authentication, and in this embodiment, is configured to support at least wireless communication with the above-mentioned reading devices 41, 51, as well as UWB communication with the distance measuring devices 42, 52, and to be able to measure distance between the distance measuring devices 42, 52 by the TWR method. As the unlocking device 6, for example, a smartphone or smartwatch having BLE and NFC communication functions for communicating identification information and a UWB communication function compatible with the TWR method, or a dedicated portable device (for example, a remote control key) having these communication functions is used.

[0036] Fig. 2 shows an example of a configuration in which the door control system 1 according to the present invention is applied to the front door D of a dwelling. Fig. 3 also shows a schematic diagram of the principle of position determination (inside / outside determination) of the unlocking device 6 by the door control system 1. Hereinafter, the inside / outside determination of the unlocking device 6 and the locking / unlocking of the electric lock unit 2 will be described with reference to Figs. 2 and 3.

[0037] In the door control system 1 shown in Fig. 2, an outdoor unit 4 is disposed on the outside of the entrance door D, and an indoor unit 5 is disposed on the inside of the door D. The outdoor unit 4 shown in the figure has a configuration in which a reading device 41 and a distance measuring device 42 are housed in a casing 43, and the reading device 41 has a wireless communication function compatible with BLE and NFC communication. The distance measuring device 42 supports two-way distance measurement using UWB communication, and this distance measuring device 42 constitutes an anchor 1 for distance measurement.

[0038] On the other hand, the indoor unit 5 is configured to house a distance measuring device 52 and the thumb turn 24 of the electric lock unit 2 in a casing 53, and does not include the reading device 51. The distance measuring device 52 supports two-way distance measurement using UWB communication, and this distance measuring device 52 constitutes an anchor 2 for distance measurement.

[0039] The unlocking device 6 is a device used to lock and unlock the electric lock unit 2, and in the illustrated example, is configured as a device such as a smartphone, smart watch, or portable device that supports BLE and NFC communication with the reading device 41 of the outdoor unit 4 and UWB communication with the distance measuring devices 42, 52 of the outdoor unit 4 and the indoor unit 5. A user of the door control system 1 carries at least one of these devices. The unlocking device 6 constitutes a tag that is the target of distance measurement by the distance measuring devices 42, 52.

[0040] In such a door control system 1, for example, when a user carrying an unlocking device 6 approaches an outdoor passageway and the unlocking device 6 enters a communication range where UWB communication is possible with the distance measuring devices 42, 52 of the outdoor unit 4 and the indoor unit 5, UWB communication is started between the distance measuring devices 42, 52 and the unlocking device 6, and the distance R1 from the distance measuring device 42 to the unlocking device 6 and the distance R2 from the distance measuring device 52 to the unlocking device 6 are measured by the TWR method. Note that the measurement of the distance to the unlocking device 6 by the distance measuring devices 42, 52 is repeated at regular intervals while the unlocking device 6 is within the UWB communication range.

[0041] In this way, when the distance measuring devices 42, 52 measure the distance to the unlocking device 6, these measurement results are transmitted to the control unit 3, and the position determination section 34 of the control unit 3 determines whether the unlocking device 6 is located on the inside or outside side of the door D.

[0042] Specifically, in the position determination unit 34, the distance R1 from the distance measuring device 42 of the outdoor unit 4 to the unlocking device 6 and the distance R2 from the distance measuring device 52 of the indoor unit 5 to the unlocking device 6 are compared. When the distance R1 is shorter than the distance R2 (when R1 < R2), it is determined that the unlocking device 6 is outside the door D. When the distance R2 is shorter than the distance R1 (when R2 < R1), it is determined that the unlocking device 6 is inside the door D. As shown in FIG. 3, when the unlocking device 6 is outdoors, the relationship R1 < R2 holds for the distances from the distance measuring devices 42 and 52 to the unlocking device 6. Conversely, when the unlocking device 6 is indoors, the relationship R1 < R2 holds for the distances from the distance measuring devices 42 and 52 to the unlocking device 6.

[0043] As described above, the door control system 1 shown in FIG. 2 includes a pair of distance measuring devices 42 and 52 on the inner and outer sides of the door D. The position determination unit 34 determines whether the unlocking device 6 is located inside or outside the door D based on the measurement results of these distance measuring devices 42 and 52, that is, a definite element of the accurately measurable distance rather than an uncertain element such as the received signal strength. Therefore, the door control system 1 can accurately determine whether the user having the unlocking device 6 is present outside or inside the door D. Thus, in the configuration where the reading device 41 is arranged only in the outdoor unit 4 as shown in the figure, as a condition for the electric lock control unit 31 to send the locking / unlocking signal to the driving unit 22, in addition to the user authentication by the authentication unit 32 being successful, the case where it is determined that the unlocking device 6 is present outside the door D is added. For example, even if the user authentication is successful in response to the unlocking device 6 indoors, the electric lock control unit 31 does not output the locking / unlocking signal to the driving unit 22, so that the door D is not accidentally locked or unlocked, and a door control system 1 suitable for hands-free locking / unlocking control of the door D can be provided.

[0044] Furthermore, for example, if the indoor unit 5 is also provided with a reading device 51 as shown in Figure 1, the condition for the electric lock control unit 31 to send a locking / unlocking signal to the drive unit 22 can be increased to include, in addition to successful user authentication by the authentication unit 32, a condition that it is determined that an unlocking device 6 is present on the side where the reading device 41, 51 that read the identification information for user authentication (input of identification information) is present. This can prevent the door D from being locked or unlocked erroneously even in a configuration in which the outdoor unit 4 and the indoor unit 5 are both provided with the reading devices 41, 51.

[0045] EMBODIMENT 2 Next, a second embodiment of the present invention will be described with reference to FIG. Fig. 4 shows an example of a configuration in which the door control system according to the present invention is applied to the opening and closing control of an entrance door in a collective housing unit such as an apartment building. Hereinafter, detailed position determination of an unlocking device and opening and closing control of a door will be explained with reference to Fig. 4.

[0046] The door control system 100 shown in Figure 4 mainly comprises a door (entrance door) D that separates the apartment complex's facilities from the entrance, a drive unit (not shown) that drives the door D to open and close, a control device 110 that controls the drive unit, a device 120 for reading identification information for user authentication, a pair of distance measuring devices 131, 132 that measure the distance to the unlocking device 140, and the unlocking device 140 that constitutes an authentication medium.

[0047] The inside of the door D is the inside of the apartment building, and the outside is an entrance where people can freely enter and exit from the outside. W1 in the figure is a wall that separates the entrance from the inside of the apartment building, and a control room in which the control device 110 is placed is provided inside this wall W1.

[0048] The control device 110 is a control device equipped with a microcomputer, and the program of this microcomputer functionally realizes a drive control unit that controls the drive unit of the door D, an authentication unit that performs user authentication of the unlocking device 140, and a position determination unit that calculates and determines the position of the unlocking device 140.

[0049] The drive control unit functions in cooperation with the authentication unit, and outputs a drive control signal that gives an instruction such as drive / stop to the drive unit of the door D when a certain condition such as passing the user authentication in the authentication unit is met. The authentication unit performs user authentication by comparing the identification information transmitted from the unlocking device 140 with the identification information for matching registered in advance in the memory of the microcomputer, as with the authentication unit 32 in the first embodiment. That is, if the identification information that matches the identification information transmitted from the unlocking device 140 is registered in the memory, it is determined that the user authentication is successful, and if the matching identification information is not registered in the memory, it is determined that the user authentication is unsuccessful. The position determination unit performs detailed position determination to specifically identify the position (coordinates) where the unlocking device 140 is located, based on the measurement results of the distance measuring devices 131 and 132.

[0050] The reading device 120 is a device for reading the identification information held by the unlocking device 140, and is configured to be capable of wireless communication with the unlocking device 140. Specifically, the reading device 120 is configured as a device compatible with BLE and NFC communication, and is configured to read the identification information stored in the unlocking device 140 via the BLE and NFC communication. The reading device 120 is placed near the door D in the entrance.

[0051] The distance measuring devices 131 and 132 are distance measuring devices using UWB communication, and perform distance measurement by the TWR method with the unlocking device 140 as a tag and the distance measuring devices 131 and 132 as anchors (Anchor1, 2) as in the above-mentioned first embodiment. In this embodiment, the distance measuring devices 131 and 132 are arranged in the vicinity of the reading device 120 (for example, adjacent to the reading device 120 or built in the reading device 120) with a predetermined interval in front and behind. Specifically, in the distance measuring devices 131 and 132, communication antennas (not shown) for performing UWB communication with the unlocking device 140 are arranged back to back with a predetermined interval L therebetween as in the above-mentioned first embodiment. In the example shown in FIG. 4, the communication antenna of the distance measuring device 132 arranged on the wall W1 side faces the wall W1 side, and the communication antenna of the distance measuring device 131 arranged on the entrance side faces the entrance side.

[0052] The unlocking device 140 is a device used to open the door D, and in the illustrated example, is composed of a smartphone, a smart watch, a mobile device, etc. that supports BLE and NFC communication with the reading device 120 and UWB communication with the distance measuring devices 131 and 132. A user of the door control system 100 carries at least one of these devices.

[0053] In such a door control system 100, for example, when a user carrying an unlocking device 6 approaches the reading device 120 in the entrance and the unlocking device 140 enters a communication range where UWB communication with the distance measuring devices 131, 132 is possible, UWB communication is started between the distance measuring devices 131, 132 and the unlocking device 140, and the distance R1 from the distance measuring device 131 to the unlocking device 140 and the distance R2 from the distance measuring device 132 to the unlocking device 140 are measured by the TWR method. Note that this distance measurement is repeated at a constant cycle while the unlocking device 140 is within the UWB communication range.

[0054] In this way, when the distance measuring devices 131, 132 measure the distance to the unlocking device 140, these measurement results are transmitted to the control device 110, and the position determination section of the control device 110 determines the detailed position of the unlocking device 140 (the position (coordinates) where the unlocking device 140 is located).

[0055] Specifically, the position determination unit identifies the position coordinates of the unlocking device 140 using a Phase Differences of Arrival (PDoA) method that calculates the position coordinates of the tag from the distance R1 from the distance measuring device 131 to the unlocking device 140, the distance R2 from the distance measuring device 132 to the unlocking device 140, and the phase difference of the radio waves received by the distance measuring devices 131 and 132. For example, the inside of the entrance is configured with coordinates consisting of X and Y axes, and the position of the unlocking device 140 is identified using these coordinates.

[0056] In this way, in the door control system 100 shown in Figure 4, the distance measuring devices 131, 132 are arranged at a predetermined interval in front and behind the outside of the door D, and the position determination unit of the control device 110 determines the position coordinates of the unlocking device 140 based on the measurement results of these distance measuring devices 131, 132, i.e., based on a definite element, that is, an accurately measurable distance, rather than an uncertain element such as reception strength, so that the door control system 100 can accurately grasp the location of the user carrying the unlocking device 140. Therefore, by setting the condition for the drive control unit of the control device 110 to output a drive control signal as being that the unlocking device 140 is present within a specified range within the entrance (for example, a range set near the reading device 120) in addition to passing user authentication in the authentication unit, it is possible to prevent the door D from being opened accidentally when the unlocking device 140 is in an inappropriate position (for example, the corridor area A1 inside the wall W1, the facility area A2 inside the door D, the delivery box area A3 located outside the entrance, etc.), and it is possible to provide a door control system 100 that is suitable for hands-free control of the opening and closing of the door D.

[0057] Furthermore, in this embodiment, since the position of the unlocking device 140 is specifically identified, even in a case where a locking / unlocking method using the unlocking device 140 as an authentication medium is adopted for the delivery box 300 in the delivery box area A3, the locking / unlocking of the delivery box 300 and the opening / closing control of the entrance door D can be clearly distinguished and controlled, thereby providing an easy-to-use door control system 100.

[0058] It should be noted that the above-described embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to these, and various design modifications are possible within the scope of the present invention.

[0059] For example, in the above-mentioned embodiment 1, a case has been shown in which the door control system 1 according to the present invention is used to lock and unlock the door D, but it is also possible to provide an automatic opening and closing device 200 that assists in opening and closing the door D, and to link this automatic opening and closing device 200 to the control unit 3 so that the door D is opened and closed in conjunction with the locking and unlocking of the electric lock.

[0060] In the above-described second embodiment, the control device 110 is provided with a position determination unit that calculates and determines the position of the unlocking device 140, but for example, the reading device 120 may be provided with the function of the position determination unit. In the above-described embodiment, the position determination unit of the control device 110 identifies the position coordinates of the unlocking device 140, but for example, as shown in the first embodiment, the position determination unit may be configured to only compare the distance to the unlocking device 140 and determine whether the unlocking device 140 is located in front of or behind the distance measuring devices 131, 132.

[0061] In the above-mentioned first and second embodiments, the distance measuring devices 42, 52, 131, 132 all measure the distance to the unlocking device 6, 140 by the TWR method using UWB communication, but other communication methods can be used as long as the distance is measured using wireless communication. In the above-mentioned second embodiment, the position to the unlocking device 6, 140 is measured by the Phase Difference of Arrival (PDoA) method, but other communication methods can be used as long as the position is measured using wireless communication.

[0062] In addition, in the above-described embodiment, the position of the unlocking device 140 is determined based on the distance to the unlocking device 140 measured by the distance measuring devices 42, 52, 131, and 132 for locking / unlocking or opening / closing control of the door D. However, it is also possible to configure the position of the unlocking device 140 to be determined in combination with position determination based on the reception strength of radio waves transmitted from the unlocking device 140. [Explanation of symbols]

[0063] 1,100 Door control system 2. Electric lock unit 3. Control Unit 4 Outdoor unit 5 Indoor unit 6,140 Unlocking device (authentication medium) 21 Electric lock mechanism 22 Drive unit 23 Control section 24 Thumb turn 31 Electric lock control unit 32 Authentication Section 33 Storage section 34 Position determination unit (position determination means) 35 Power supply section 41,51 Reading device 42,52 Distance measuring device (distance measuring means) 110 Control device 120 Reading device 131,132 Distance measuring device (distance measuring means)

Claims

1. A door control system that locks and unlocks a door or controls the opening and closing of a door by authenticating unique identification information held by an authentication medium, a pair of distance measuring means arranged in the vicinity of the door and measuring a distance to the authentication medium by wireless communication with the authentication medium; and a position determining means for determining the position of the authentication medium based on the measurement results of the pair of distance measuring means. A door control system comprising:

2. The pair of distance measuring means are disposed on the inside and outside of the door, respectively; The position determination means determines whether the authentication medium is located inside or outside the door by comparing the measurement results of the pair of distance measurement means.

2. The door control system according to claim 1.

3. The pair of distance measuring means are disposed at a predetermined distance from each other on the outer side of the door, The position determination means determines whether the authentication medium is located in front of or behind the distance measuring means by comparing the measurement results of the pair of distance measuring means.

2. The door control system according to claim 1.

4. The distance measuring means measures the distance to the authentication medium by two-way distance measurement using ultra-wideband communication with the authentication medium.

4. A door control system according to claim 1, wherein the door control system is a door control system for controlling a door.

5. The position determining means determines the position of the authentication medium by an arrival phase difference method based on a phase difference between radio waves received by the pair of distance measuring means.

5. The door control system according to claim 4.

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