Door lock control system and mobile terminal

Abstract

To provide a door lock control system which can prevent lock of a door from being released at timing not intended by a user even in a case where the user enters a building by releasing the lock of the door using a physical key, IC key or the like of himself / herself without using a hand-free unlocking function of a portable terminal.SOLUTION: A door lock control system 100 comprises: a door lock control device 4 for controlling lock 3 of a door 2; and a portable terminal 5 which can wirelessly communicate to the door lock control device 4 and is possessed by a user. The portable terminal 5 determines whether or not the portable terminal 5 exists inside or outside the building partitioned by a door 2 on the basis of the acceleration of the portable terminal 5 detected by an acceleration sensor 55, and transmits a release signal for releasing the lock 3 of the door 2 to the door lock control device 4 when the portable terminal 5 exists outside the building.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention generally relates to a door lock control system for controlling door locks and a mobile terminal used in the door lock control system, and more specifically to a door lock control system for automatically unlocking doors when a mobile terminal carried by a user approaches a door lock control device that controls the door locks, and a mobile terminal used in the door lock control system. [Background technology]

[0002] Conventionally, to unlock a door of a house or office and enter the building, a physical key such as a metal key, an RFID-type IC key (card, tag, etc.), identification information such as a PIN number, or biometric information such as a fingerprint has been used. In particular, with the recent widespread use of mobile devices such as smartphones, door lock control systems that unlock doors based on signals emitted from the mobile device carried by the user have become widespread. For example, Patent Document 1 discloses a door lock control system that automatically unlocks an electronic door lock by authenticating the user using a signal emitted from the mobile device carried by the user. Such door lock control systems are also called smart lock systems.

[0003] In a smart lock system, a door lock control device is attached to the door to control the door's lock on and off, and the user registers their mobile device through mutual authentication between the door lock control device attached to the door and the mobile device. Furthermore, the mobile device carried by the user can use its GPS function to detect when the mobile device enters or leaves a specified area centered on the door (or door lock control device). This function of detecting when the mobile device enters or leaves a specified area is called a geofence function.

[0004] When the geofence function of the mobile device detects that the mobile device has entered a predetermined range centered on the door and the mobile device approaches a certain distance from the door lock control device attached to the door, a wireless connection (typically a pairing connection via Bluetooth (registered trademark) communication) is established between the mobile device and the door lock control device, and the door lock control device automatically unlocks the door. This provides a hands-free unlocking function that automatically unlocks the door without operating the mobile device. After the user enters the building, the door is relocked by the user's own operation or automatically by the door lock control device.

[0005] When the door is automatically unlocked by the hands-free unlocking function of the mobile device and the user enters the building, the mobile device carried by the user determines that the user has unlocked the door and entered the building and deactivates its own hands-free unlocking function. Therefore, even if the user carrying the mobile device approaches the door from a certain distance indoors, the door lock control device does not automatically unlock the door. The user who is indoors can unlock the door from inside by manually performing a predetermined operation to unlock the door via the mobile device or on the door lock control device, and go outside. Then, when the geofence function of the mobile device detects that the mobile device has left a certain range centered on the door, the mobile device activates its own hands-free unlocking function. With this configuration, the door can be automatically unlocked when the mobile device carried by the user approaches the door from outside again within a certain distance.

[0006] However, if a connection between a mobile device and a door lock control device cannot be temporarily established, the user may unlock the door using their own physical key or IC key without using the mobile device's hands-free unlocking function and enter the building, and the door may then be relocked by the user or automatically. In this case, the mobile device does not determine that the user unlocked the door and entered the building, so the hands-free unlocking function is not deactivated. Therefore, when a user carrying a mobile device approaches the door by a certain distance, the door may be unlocked by the mobile device's hands-free unlocking function at a time unintended by the user. In conventional technologies, in such cases, the user is required to manually deactivate the hands-free unlocking function of the mobile device after entering the building. However, deactivating the hands-free unlocking function requires the user to operate the mobile device, which reduces the usability of the hands-free unlocking function. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-218547 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to provide a door lock control system and a mobile terminal used in the door lock control system that can prevent the door from being unlocked at a time not intended by the user, without requiring the user to deactivate the hands-free unlocking function of the mobile terminal, even if the user unlocks the door using their own physical key, IC key, etc. and enters the house without using the hands-free unlocking function of the mobile terminal. [Means for solving the problem]

[0009] Such an object can be achieved by the present invention as defined by the following (1) and (2).

[0010] (1) a door lock control device for controlling door locks; a mobile terminal carried by a user and capable of wirelessly communicating with the door lock control device; the mobile terminal is equipped with an acceleration sensor capable of detecting acceleration of the mobile terminal; The mobile terminal determining whether the mobile terminal is located outdoors or indoors separated by the door based on the acceleration of the mobile terminal detected by the acceleration sensor; A door lock control system configured to transmit an unlock signal to the door lock control device when the mobile terminal is outdoors, for unlocking the door.

[0011] (2) Equipped with an acceleration sensor that can detect the acceleration of the mobile device. determining whether the mobile terminal is located outdoors or indoors separated by a door based on the acceleration of the mobile terminal detected by the acceleration sensor; A mobile terminal characterized in that, when the mobile terminal is located outdoors, it is configured to transmit an unlock signal for unlocking the door to a door lock control device that controls the lock of the door. [Effects of the Invention]

[0012] According to the present invention, the door lock can be automatically unlocked only when a wireless connection is established between a mobile terminal carried by a user and the door lock control device and the mobile terminal is determined to be outdoors. This prevents the door from being unlocked at a time unintended by the user, even if the user unlocks the door using a physical key, IC key, or the like without using the hands-free unlocking function of the mobile terminal and enters the building. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating a door lock control system according to an embodiment of the present invention; [Figure 2] FIG. 2 is a block diagram of the mobile terminal shown in FIG. [Figure 3] 10 is a graph showing a typical change in acceleration of a mobile terminal when a user carrying the mobile terminal approaches a door of a building from outdoors, opens the door, and then enters the building. [Figure 4] 2 is a flowchart of a door lock control method executed by the door lock control system shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A door lock control system and a mobile terminal according to an embodiment of the present invention will be described in detail below with reference to Figures 1 to 3. Figure 1 is a diagram that schematically shows a door lock control system according to an embodiment of the present invention. Figure 2 is a block diagram of the mobile terminal shown in Figure 1. Figure 3 is a graph that shows a typical change in acceleration of a mobile terminal when a user carrying the mobile terminal approaches a door of a building from outside, opens the door, and then enters the building.

[0015] The door lock control system 100 shown in FIG. 1 includes a door 2 of a building 1, a lock 3 for the door 2, a door lock control device 4 for controlling the lock 3, and a mobile terminal 5 carried by a user. In the door lock control system 100, when the mobile terminal 5 carried by the user approaches the door lock control device 4 from outside at a certain distance, the mobile terminal 5 transmits an unlock signal to the door lock control device 4 to unlock the lock 3 of the door 2. This provides a hands-free unlocking function in which the door lock control device 4 automatically unlocks the lock 3 of the door 2 when the user carrying the mobile terminal 5 approaches the door 2 of the building 1 from outside at a certain distance. The user can use the hands-free unlocking function by first performing mutual authentication between the user's mobile terminal 5 and the door lock control device 4 and registering the mobile terminal 5.

[0016] The building 1 is any building, such as a house or an office. The door 2 is the entrance to the building 1 and separates the outdoors (the space outside the building 1) from the indoors (the space inside the building 1). The door 2 may be a hinged door as shown in FIG. 1 or a sliding door. The door 2 may also be a manual door that is opened and closed manually, or an automatic door that is opened and closed automatically by a door drive device (not shown). The lock 3 has a function of restricting the opening and closing of the door 2. When the lock 3 is on, the door 2 cannot be opened, and the door 2 can be opened only when the lock 3 is off. The lock 3 is not particularly limited as long as it is on / off controlled by the door lock control device 4 and can restrict the opening and closing of the door 2. Typically, the lock 3 can be a thumb turn lock or an electronic lock that can lock the door 2 by operating the door lock control device 4.

[0017] The door lock control device 4 has a function of turning on / off the lock 3 of the door 2. The door lock control device 4 is provided on the door 2. Typically, the door lock control device 4 is provided on the inside surface of the door 2 (the surface facing the interior of the building 1), and is provided on the building 1 so that it can be manually operated from inside the building 1, i.e., from the indoor side. A user inside the building 1 can unlock the lock 3 of the door 2 and go outside the building 1 by performing an operation to unlock the lock 3 of the door 2 via a mobile terminal 5 or directly on the door lock control device 4.

[0018] The door lock control device 4 is configured to be capable of wireless communication with a mobile terminal 5 carried by a user. The type of wireless communication between the door lock control device 4 and the mobile terminal 5 is not particularly limited, but preferably, the wireless communication between the door lock control device 4 and the mobile terminal 5 complies with the BLE (Bluetooth (registered trademark) Low Energy) standard. Hereinafter, it is assumed that the wireless communication between the door lock control device 4 and the mobile terminal 5 complies with the BLE standard.

[0019] As shown in FIG. 1, the door lock control device 4 includes a BLE communication unit 41 for performing wireless communication according to the BLE standard, and a lock control unit 42 for operating the lock 3 of the door 2 and controlling the on / off of the lock 3.

[0020] The BLE communication unit 41 is a unit used to perform wireless communication in accordance with the BLE standard. The BLE communication unit 41 includes components necessary for performing wireless communication in accordance with the BLE standard, such as an antenna, a transmitting / receiving circuit, and a modulation / demodulation circuit, and wirelessly transmits and receives BLE signals in accordance with the BLE standard. The BLE communication unit 41 is not particularly limited as long as it can wirelessly transmit and receive BLE signals in accordance with the BLE standard, and any BLE communication unit known in the field of telecommunications can be used. The door lock control device 4 uses the BLE communication unit 41 to establish a wireless connection (pairing connection) with the mobile terminal 5 and further transmits BLE signals to the mobile terminal 5 at a predetermined frequency (e.g., at least once per second).

[0021] The lock control unit 42 has a function of operating the lock 3 of the door 2 to turn the lock 3 on / off in response to an unlock signal received from the mobile terminal 5 via the BLE communication unit 41 or a manual operation from the user to the door lock control device 4. If the lock 3 is a thumb turn lock, the lock control unit 42 is configured to turn the lock 3 on / off by rotating a knob on the lock 3. If the lock 3 is an electronic lock, the lock control unit 42 is configured to turn the lock 3 on / off by transmitting a control signal to the lock 3.

[0022] The lock control unit 42 also unlocks the lock 3 of the door 2 when a user inside the building performs a predetermined operation on the door lock control device 4. This allows the user inside the building to unlock the lock 3 of the door 2 and exit the building 1. Furthermore, the lock control unit 42 may be configured to automatically turn on the lock 3 of the door 2 when a predetermined time has elapsed since the lock 3 of the door 2 was unlocked manually by the user or using the hands-free unlocking function of the mobile terminal 5. With this configuration, an auto-lock function can be provided.

[0023] The mobile terminal 5 is any information terminal capable of wireless communication with the door lock control device 4, such as a tablet computer, a smartphone, or a PDA, and portable by a user. As shown in FIG. 2 , the mobile terminal 5 includes one or more processors 51 for controlling the mobile terminal 5, an I / O (input / output) interface 52 for inputting to and outputting from the mobile terminal 5, a BLE communication unit 53 for performing wireless communication according to the BLE standard, a GPS unit 54 for acquiring position information and positioning error of the mobile terminal 5 by receiving signals from multiple GPS satellites, an acceleration sensor 55 for detecting acceleration of the mobile terminal 5, and one or more memories 56 for storing data 57 and modules 58 used to execute processing of the mobile terminal 5.

[0024] The one or more processors 51 are computing units that perform computations, such as signal manipulation, based on computer-readable instructions, such as one or more microprocessors, microcomputers, microcontrollers, digital signal processors (DSPs), central processing units (CPUs), memory control units (MCUs), graphics processing units (GPUs), state machines, logic circuits, application specific integrated circuits (ASICs), or combinations thereof. In particular, the processor 51 is configured to fetch computer-readable instructions (e.g., data, programs, modules, etc.) stored in the memory 56 and perform computations, signal manipulations, and control.

[0025] The I / O interface 52 includes various software interfaces and hardware interfaces, such as a web interface and a graphical user interface (GUI). For example, the I / O interface 52 is an interface for peripheral devices such as a keyboard, a mouse, a touch panel display, an external memory, a printer, and a display. The I / O interface 52 enables input to the mobile terminal 5 using input devices such as a keyboard, a mouse, and a touch panel display, and output from the mobile terminal 5 to a display, a printer, and an external memory. The I / O interface 52 may also enable the mobile terminal 5 to communicate with any external device, such as an external web server or data server, via a network such as the Internet.

[0026] The BLE communication unit 53 is a unit used to perform wireless communication in accordance with the BLE standard, similar to the BLE communication unit 41 of the door lock control device 4. The mobile terminal 5 uses the BLE communication unit 53 to establish a wireless connection (pairing connection) with the door lock control device 4, and further receives BLE signals from the door lock control device 4 at the predetermined frequency described above.

[0027] The GPS unit 54 receives GPS signals from three or more GPS satellites in a satellite orbit and performs three-dimensional positioning based on the GPS signals received from each GPS satellite, thereby obtaining the position information (latitude and longitude) and positioning error of the mobile terminal 5. As is well known, the positioning error of the mobile terminal 5 depends on the number of GPS satellites from which the GPS unit 54 of the mobile terminal 5 can receive GPS signals, and the greater the number of GPS satellites from which the GPS unit 54 of the mobile terminal 5 can receive GPS signals, the smaller the positioning error of the mobile terminal 5.

[0028] The acceleration sensor 55 can detect the acceleration of the mobile terminal 5. The acceleration sensor 55 is typically a gyro sensor that can detect acceleration in three axial directions (x-axis direction, y-axis direction, and z-axis direction), and outputs a composite value of the acceleration in the three axial directions. The acceleration sensor 55 outputs the composite value of the acceleration in the three axial directions of the mobile terminal 5 at a predetermined frequency (for example, at least once every 0.1 seconds).

[0029] The memory 56 is a computer-readable medium including a volatile storage medium (e.g., RAM, SRAM, DRAM), a non-volatile storage medium (e.g., ROM, EPROM, EEPROM, flash memory, hard disk, optical disk, CD-ROM, digital versatile disk (DVD), Blu-ray disk, magnetic cassette, magnetic tape, magnetic disk), or a combination thereof.

[0030] The memory 56 is communicatively connected to the processor 51, and stores data 57 necessary for the mobile terminal 5 to execute processing, and a plurality of modules 58 executable by the processor 51. The memory 56 also has a function of temporarily storing data received, processed, or generated by one or more of the plurality of modules 58, as well as data necessary for executing processing by the plurality of modules 58. The data 57 stored in the memory 56 includes an indoor flag 571 indicating whether the mobile terminal 5 is indoors or not, an outdoor / indoor discrimination condition 572 used to determine whether the mobile terminal 5 carried by the user is indoors (inside the building 1) or outdoors (outside the building 1) separated by the door 2, and other data 573 required to execute processing of the mobile terminal 5.

[0031] The indoor flag 571 is a flag for indicating whether or not the mobile terminal 5 is located indoors. When the indoor flag 571 is set to "0", it indicates that the mobile terminal 5 is located outdoors. On the other hand, when the indoor flag 571 is set to "1", it indicates that the mobile terminal 5 is located indoors.

[0032] The outdoor / indoor determination condition 572 is used to determine whether the mobile terminal 5 carried by the user is located indoors (inside the building 1) or outdoors (outside the building 1) separated by the door 2. More specifically, the outdoor / indoor determination condition 572 is used to determine whether the mobile terminal 5 is located outdoors or indoors based on the standard deviation within a predetermined period of the composite value of the acceleration in the three axial directions of the mobile terminal 5 detected by the acceleration sensor 55. A method for determining whether the mobile terminal 5 is located outdoors or indoors based on the standard deviation within a predetermined period of the composite value of the acceleration in the three axial directions of the mobile terminal 5 will be described in detail below.

[0033] When a user carrying mobile terminal 5 walks toward door 2, mobile terminal 5 vibrates due to the user's walking, and acceleration of mobile terminal 5 is detected by acceleration sensor 55. FIG. 3 is a graph showing a typical change in acceleration of mobile terminal 5 when a user carrying mobile terminal 5 approaches door 2 of building 1 from outside, opens door 2, and then enters building 1 (indoors). In the graph of FIG. 3, the horizontal axis represents time (seconds), and the vertical axis represents the composite value (m / s) of acceleration of mobile terminal 5 in the three axial directions. 2 ) In the graph of FIG. 3, it is assumed that the user opens door 2 at time 0 second to enter the building.

[0034] As is clear from the graph in FIG. 3, the variation in the composite value of the acceleration in the three-axis direction of the mobile device 5 when the user is walking outdoors is greater than the variation in the composite value of the acceleration in the three-axis direction of the mobile device 5 when the user is walking indoors. Users walking outdoors wear outdoor shoes with relatively hard soles, so they kick the ground firmly as they walk, which makes the magnitude of the vibration of the mobile device 5 more likely to vary. On the other hand, users walking indoors are barefoot or wear indoor shoes with relatively soft soles, so they walk without kicking the ground firmly, which makes the magnitude of the vibration of the mobile device 5 less likely to vary. The difference in the variation in the composite value of the acceleration in the three-axis direction of the mobile device 5 between indoors and outdoors shown in FIG. 3 is thought to be due to these reasons.

[0035] The outdoor / indoor determination condition 572 is a condition for determining whether the portable terminal 5 held by the user is outdoors or indoors by utilizing the difference in the characteristics of the composite value of the acceleration in the three-axis directions of the portable terminal 5 when the user is walking outdoors and when the user is walking indoors. More specifically, the outdoor / indoor determination condition 572 is a threshold value related to the standard deviation of the composite value of the acceleration in the three-axis directions of the portable terminal 5 over a predetermined period. The predetermined period is set appropriately according to the walking speed of the user. For example, since the average time it takes for a typical adult to take one step is 0.4 seconds, the predetermined period is set to at least 10 steps, i.e., at least 4 seconds. Furthermore, the threshold value related to the standard deviation of the composite value of the acceleration in the three-axis directions of the portable terminal 5 over a predetermined period is set appropriately according to the user's body type, walking speed, etc. For example, the threshold value related to the standard deviation of the composite value of the acceleration in the three-axis directions of the portable terminal 5 over a predetermined period is set to 0.9 m / s 2 Hereinafter, the standard deviation of the composite value of the acceleration of the mobile terminal 5 in the three axial directions over a predetermined period will be simply referred to as the "standard deviation of the acceleration of the mobile terminal 5."

[0036] Note that outdoor / indoor discrimination condition 572, i.e., the threshold value related to the standard deviation of the acceleration of mobile terminal 5, may be a fixed value or a dynamically changing value. When outdoor / indoor discrimination condition 572 changes dynamically, outdoor / indoor discrimination condition 572 may be a value obtained by multiplying the standard deviation of the acceleration of mobile terminal 5, which is calculated for the first time after mobile terminal 5 enters a predetermined area, by an arbitrary coefficient such as 0.5 or 0.3.

[0037] If the standard deviation of the acceleration of the mobile terminal 5 is equal to or greater than a predetermined threshold, the mobile terminal 5 can determine that the mobile terminal 5 is outdoors. When it is determined that the mobile terminal 5 is outdoors, the indoor flag 571 in the memory 56 of the mobile terminal 5 is set to "0". On the other hand, when the standard deviation of the acceleration of the mobile terminal 5 is less than the predetermined threshold, the mobile terminal 5 can determine that the mobile terminal 5 is indoors. When it is determined that the mobile terminal 5 is indoors, the indoor flag 571 in the memory 56 of the mobile terminal 5 is set to "1".

[0038] Returning to FIG. 2, modules 58 stored in memory 56 are computer-readable instructions executable by processor 51, such as routines, applications, programs, algorithms, libraries, objects, components, data structures, or combinations thereof.

[0039] Module 58 includes a geofence module 581 for detecting whether the mobile terminal 5 enters or exits a predetermined area (geofence) centered on door 2 (or door lock control device 4), an outdoor / indoor discrimination module 582 for determining whether the mobile terminal 5 carried by the user is located outdoors or indoors separated by door 2, and any number of other modules 583 for supplementing the functions provided by the mobile terminal 5.

[0040] The geofence module 581 is used to detect whether the mobile terminal 5 has entered or exited a predetermined area (geofence) centered on the door 2 (or the door lock control device 4) based on the location information of the mobile terminal 5 acquired by the GPS unit 54. The predetermined area is appropriately set to cover the building 1 by an external signal or operation via the I / O interface 52. In one example, the predetermined area is a range with a diameter of 100 m centered on the door 2 (or the door lock control device 4).

[0041] When the geofence module 581 determines that the mobile terminal 5 has entered a predetermined area, it transmits the determination result to the processor 51, and the processor 51 activates a hands-free unlocking function of the mobile terminal 5. When the hands-free unlocking function of the mobile terminal 5 is activated, the processor 51 starts processing to establish a wireless connection (pairing connection) with the door lock control device 4 using the BLE communication unit 53. On the other hand, when the geofence module 581 determines that the mobile terminal 5 has left the predetermined area, it deactivates the hands-free unlocking function of the mobile terminal 5, and further sets the indoor flag 571 stored in the memory 56 to "0."

[0042] The outdoor / indoor determination module 582 is used to determine whether the mobile terminal 5 carried by the user is located outdoors or indoors separated by the door 2. When the hands-free unlocking function of the mobile terminal 5 is activated by the geofence module 581, the outdoor / indoor determination module 582 starts acquiring a composite value of the acceleration of the mobile terminal 5 in the three axial directions from the acceleration sensor 55, and calculates the standard deviation of the acceleration of the mobile terminal 5. Next, the outdoor / indoor determination module 582 determines whether the mobile terminal 5 is located outdoors or indoors based on the outdoor / indoor determination condition 572 stored in the memory 56 and the calculated standard deviation of the acceleration of the mobile terminal 5.

[0043] More specifically, if the calculated standard deviation of the acceleration of the mobile terminal 5 is equal to or greater than a predetermined threshold value (outdoor / indoor determination condition 572), the outdoor / indoor determination module 582 determines that the mobile terminal 5 is outdoors, and sets the indoor flag 571 stored in the memory 56 to "0." On the other hand, if the calculated standard deviation of the acceleration of the mobile terminal 5 is less than the predetermined threshold value (outdoor / indoor determination condition 572), the outdoor / indoor determination module 582 determines that the mobile terminal 5 is indoors, and sets the indoor flag 571 stored in the memory 56 to "1."

[0044] When the indoor flag 571 is set to "0", the outdoor / indoor determination module 582 outputs that the mobile terminal 5 is located outdoors. On the other hand, when the indoor flag 571 is set to "1", the outdoor / indoor determination module 582 outputs that the mobile terminal 5 is located indoors. The determination result by the outdoor / indoor determination module 582 is output to the processor 51. When a wireless connection between the mobile terminal 5 and the door lock control device 4 is established and the outdoor / indoor determination module 582 determines that the mobile terminal 5 is located outdoors, the processor 51 uses the BLE communication unit 53 to transmit an unlock signal to the door lock control device 4 to unlock the lock 3 of the door 2. The door lock control device 4, which has received the unlock signal from the mobile terminal 5, unlocks the lock 3 of the door 2.

[0045] Next, a door lock control method executed by the door lock control system of the present invention will be described in detail with reference to Fig. 4. Fig. 4 is a flowchart of a door lock control method S100 executed by the door lock control system shown in Fig. 1.

[0046] In step S110, the processor 51 of the portable terminal 5 uses the geofence module 581 to determine whether the portable terminal 5 has entered a predetermined area centered on the door 2 (or the door lock control device 4) based on the location information of the portable terminal 5 acquired by the GPS unit 54. If it is determined in step S110 that the portable terminal 5 has entered the predetermined area, the processor 51 activates a hands-free unlocking function of the portable terminal 5, and the process proceeds to steps S120 and S130. On the other hand, if it is determined in step S110 that the portable terminal 5 has not entered the predetermined area, the process of step S110 is repeated. Note that when the hands-free unlocking function of the portable terminal 5 is activated in step S110, the indoor flag 571 stored in the memory 56 of the portable terminal 5 is set to "0," and further, the lock 3 of the door 2 is turned on.

[0047] In step S120, the processor 51 establishes a wireless connection (pairing connection) with the door lock control device 4 using the BLE communication unit 53. The wireless connection between the mobile terminal 5 and the door lock control device 4 is established when the mobile terminal 5 approaches the door lock control device 4 by a certain distance (for example, 3 to 5 m). Once the wireless connection between the mobile terminal 5 and the door lock control device 4 is established, the mobile terminal 5 receives a BLE signal from the door lock control device 4 at a predetermined frequency.

[0048] In step S130, the processor 51 uses the outdoor / indoor determination module 582 to determine whether the user carrying the portable terminal 5 has opened the door 2 and entered indoors, based on the outdoor / indoor determination condition 572 stored in the memory 56 and the acceleration of the portable terminal 5. In step S130, the outdoor / indoor determination module 582 calculates the standard deviation within a predetermined period of the composite value of the acceleration in the three axial directions of the portable terminal 5 obtained from the acceleration sensor 55 (hereinafter simply referred to as the "standard deviation of the acceleration of the portable terminal 5"). Thereafter, if the calculated standard deviation of the acceleration of the portable terminal 5 is equal to or greater than a predetermined threshold value (the outdoor / indoor determination condition 572), the outdoor / indoor determination module 582 sets the indoor flag 571 stored in the memory 56 to "0." On the other hand, if the calculated standard deviation of the acceleration of the portable terminal 5 is less than the predetermined threshold value (the outdoor / indoor determination condition 572), the outdoor / indoor determination module 582 sets the indoor flag 571 stored in the memory 56 to "1."

[0049] Furthermore, in step S130, the outdoor / indoor determination module 582 refers to the indoor flag 571 stored in the memory 56. If the indoor flag 571 is set to "0", the outdoor / indoor determination module 582 outputs to the processor 51 that the mobile terminal 5 is located outdoors. On the other hand, if the indoor flag 571 is set to "1", the outdoor / indoor determination module 582 outputs to the processor 51 that the mobile terminal 5 is located indoors.

[0050] When wireless communication (pairing connection) with the door lock control device 4 is established in step S120 and it is further determined in step S130 whether the mobile terminal 5 is located outdoors or indoors, the process proceeds to step S140. If it is determined in step S130 that the mobile terminal 5 is located outdoors, the process proceeds to step S150. In step S150, the processor 51 uses the BLE communication unit 53 to send an unlock signal to the door lock control device 4 to unlock the lock 3 of the door 2. Upon receiving the unlock signal from the mobile terminal 5, the door lock control device 4 unlocks the lock 3 of the door 2. Thereafter, the door lock control method S100 ends. On the other hand, if it is determined in step S130 that the mobile terminal 5 is located indoors, the door lock control method S100 ends.

[0051] As described above, by using the door lock control system 100 of the present invention, the lock 3 of the door 2 can be automatically unlocked only when wireless communication between the mobile terminal 5 carried by the user and the door lock control device 4 is established and it is determined that the mobile terminal 5 is outdoors. In particular, in the door lock control system 100 of the present invention, the processor 51 of the mobile terminal 5 can determine, using the outdoor / indoor determination module 582, that the user has opened the door 2 and entered the indoors. Therefore, even if the user unlocks the lock 3 of the door 2 using their own physical key, IC key, or the like without using the hands-free unlocking function of the mobile terminal 5 and enters the indoors, the indoor flag 571 stored in the memory 56 of the mobile terminal 5 can be appropriately set. This prevents the lock 3 of the door 2 from being unlocked at a timing unintended by the user when the user carrying the mobile terminal 5 approaches the door 2 indoors. Therefore, even if the user unlocks the lock 3 of the door 2 using their own physical key, IC key, or the like, without using the hands-free unlocking function of the mobile terminal 5, and enters the building, there is no need to request the user to deactivate the hands-free unlocking function, thereby improving the usability of the hands-free unlocking function.

[0052] Although the door lock control system 100 and the mobile terminal 5 of the present invention have been described above based on the illustrated embodiment, the present invention is not limited thereto. The configuration of each component of the present invention can be replaced with any other component that can perform the same function, or any other component can be added to the configuration of the present invention. Furthermore, each component of the door lock control system 100 and the mobile terminal 5 may be realized in hardware, software, or a combination thereof.

[0053] Furthermore, in the present invention, it is determined whether the mobile terminal 5 is outdoors or indoors based on the standard deviation of the acceleration of the mobile terminal 5, but it may also be possible to comprehensively determine whether the mobile terminal 5 is outdoors or indoors by combining the standard deviation of the acceleration of the mobile terminal 5 with any other information that can be acquired by the mobile terminal 5. The comprehensive determination may be performed by majority vote of determinations based on the information used, or according to a score obtained by weighting and adding the confidence levels (reliabilities) of each determination.

[0054] Those skilled in the art and technology to which the present invention pertains will be able to modify the configurations of the described door lock control system and mobile terminal of the present invention without significantly departing from the principles, concepts, and scope of the present invention, and door lock control systems and mobile terminals having modified configurations are also within the scope of the present invention. [Explanation of symbols]

[0055] 1...Building 2...Door 3...Lock 4...Door lock control device 41...BLE communication unit 42...Lock control unit 5...Mobile terminal 51...Processor 52...I / O interface 53...BLE communication unit 54...GPS unit 55...Acceleration sensor 56...Memory 57...Data 571...Indoor flag 572...Outdoor / indoor discrimination condition 573...Other data 58...Module 581...Geofence module 582...Outdoor / indoor discrimination module 583...Other modules 100...Door lock control system S100...Door lock control method S110, S120, S130, S140, S150...Processes

Claims

1. a door lock control device for controlling the locking of the door; a mobile terminal carried by a user and capable of wirelessly communicating with the door lock control device; the mobile terminal is equipped with an acceleration sensor capable of detecting acceleration of the mobile terminal; The mobile terminal determining whether the mobile terminal is located outdoors or indoors separated by the door based on the acceleration of the mobile terminal detected by the acceleration sensor; A door lock control system configured to transmit an unlock signal to the door lock control device when the mobile terminal is outdoors, for unlocking the door.

2. 2. The door lock control system according to claim 1, wherein the mobile terminal is configured to determine that the mobile terminal is outdoors when a standard deviation of the acceleration of the mobile terminal detected by the acceleration sensor is equal to or greater than a predetermined threshold value.

3. the mobile terminal includes a GPS unit capable of acquiring location information of the mobile terminal; The door lock control system according to claim 1 or 2, wherein the mobile terminal is configured to determine whether the mobile terminal has entered a predetermined area centered on the door lock control device based on the location information of the mobile terminal, and when it is determined that the mobile terminal has entered the predetermined area, to determine whether the mobile terminal is located outdoors or indoors separated by the door.

4. 4. The door lock control system according to claim 1, wherein the door lock control device is configured to transmit a signal to the mobile terminal at a predetermined frequency.

5. 5. The door lock control system according to claim 1, wherein the wireless communication between the door lock control device and the mobile terminal complies with the BLE (Bluetooth Low Energy) standard.

6. It is equipped with an acceleration sensor that can detect the acceleration of the mobile device. determining whether the mobile terminal is located outdoors or indoors separated by a door based on the acceleration of the mobile terminal detected by the acceleration sensor; A mobile terminal characterized in that, when the mobile terminal is located outdoors, it is configured to transmit an unlock signal for unlocking the door to a door lock control device that controls the lock of the door.

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