Automatic door control device and automatic door control system

Abstract

The system will be designed to open automatic doors based on the authentication results from the authentication terminal. [Solution] The automatic door control device according to the present invention is an automatic door control device connected via an automatic door to an authentication terminal having a switch element having a common terminal and first and second selection terminals, and a processing unit that switches the connection destination of the common terminal between the first and second selection terminals according to the authentication result, and controls the automatic door to be in an open state according to a change in the combination of the potential of a first input terminal connected to the first selection terminal via the door and the potential of a second input terminal connected to the second selection terminal via the door.

Description

Technical Field

[0001] The present invention relates to a door lock unauthorized unlocking prevention device and a door lock system.

Background Art

[0002] In recent years, door lock systems corresponding to unlocking by face authentication have emerged. In this type of door lock system, a face authentication terminal is provided on the outside of the door, and a door lock release motor control unit is provided on the inside of the door. The door lock release motor control unit is configured to release the lock of the door in response to successful authentication by the face authentication terminal.

[0003] Patent Document 1 discloses an example of a door lock system, although it is not a face authentication type. The basic configuration of this door lock system includes an authentication unit, a motor that controls a thumb turn, and a motor drive unit that drives the motor according to the authentication result of the authentication unit. The motor and the motor drive unit are connected by two cables passing through the door. With only these configurations, if the two cables connecting the motor and the motor drive unit are cut and a predetermined voltage is applied to the cut point, the motor can be driven regardless of the authentication result of the authentication unit. Therefore, in the door lock system described in Patent Document 1, in addition to the above basic configuration, a switch inserted in the cable, a pulse generation unit that generates a pulse signal only when authentication is successful, and a switch control unit that turns on the switch only when a pulse signal is generated are provided. According to this configuration, it can be said that it is possible to prevent unauthorized unlocking to some extent because the motor cannot be driven unless authentication is successful and a pulse signal is generated.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, according to the configuration of Patent Document 1, if the cable connecting the pulse generation unit and the switch control unit is cut and a pulse signal is illegally applied to the cut point, the lock will ultimately be illegally unlocked. Therefore, there was a need for a technology that could more reliably prevent illegal unlocking.

[0006] Therefore, one of the objectives of the present invention is to provide a door lock unauthorized unlocking prevention device and door lock system that can prevent unauthorized unlocking of doors more reliably than conventional devices. [Means for solving the problem]

[0007] The door lock unauthorized release prevention device according to the present invention is a door lock unauthorized release prevention device connected via a door to an authentication terminal having a switch element having a common terminal and first and second selection terminals, and a processing unit that switches the connection destination of the common terminal between the first and second selection terminals according to the authentication result, and controls the locked state of the door according to a change in the combination of the potential of a first input terminal connected to the first selection terminal via the door and the potential of a second input terminal connected to the second selection terminal via the door.

[0008] The door lock system according to the present invention comprises a door lock unauthorized release prevention device, an authentication terminal including the switch element and the processing unit, a motor for locking and unlocking the door, and a door lock release motor control unit that drives the motor, wherein the door lock unauthorized release prevention device controls the locked state of the door by controlling the potential supplied to the door lock release motor control unit. [Effects of the Invention]

[0009] According to the present invention, the lock state of the door is controlled according to the change in the combination of potentials of the first and second selection terminals, thus preventing unlocking due to cable cutting. Therefore, since unauthorized unlocking of the door can be prevented without using pulse signals, it becomes possible to prevent unauthorized unlocking of the door more reliably than in the conventional method. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows the configuration (locked state) of the door lock system 1 according to an embodiment of the present invention. [Figure 2] This figure shows the configuration (unlocked state) of the door lock system 1 according to an embodiment of the present invention. [Figure 3] This is a processing flow diagram showing the operation of the door lock unauthorized release prevention device 40 according to an embodiment of the present invention. [Figure 4] This figure shows the configuration of a door locking system 1 according to a modified embodiment of the present invention. [Figure 5] This figure shows the configuration of a door locking system 100 based on the background technology of the present invention. [Modes for carrying out the invention]

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. First, the configuration and operation of the door lock system 100 according to the background art of the present invention and its problems will be described, and then the configuration, operation, and effects of the door lock system 1 according to this embodiment will be described in detail.

[0012] Figure 5 shows a door lock system 100 based on the background art of the present invention. Note that the door lock system 100 shown in the figure was developed by the inventor of the present application and was not publicly known at the time of filing the present application.

[0013] As shown in Figure 5, the door lock system 100 comprises a facial recognition terminal 10, a door unlock motor control unit 20, and a motor 30. The facial recognition terminal 10 is located on the outside of the door D (i.e., in a place accessible to a user outside the door D), while the door unlock motor control unit 20 and motor 30 are located on the inside of the door D (i.e., in a place inaccessible to a user outside the door D).

[0014] The facial recognition terminal 10 is a terminal that performs facial recognition of a user who is outside door D and is about to open door D, and is composed of a processing unit 11, a switch element 12, and a camera 13. The camera 13 is positioned to easily capture the face of a user in front of door D, and is configured to continuously supply images obtained by continuous shooting processing to the processing unit 11. Alternatively, the facial recognition terminal 10 may be configured to detect the presence of a person outside door D by providing a motion sensor, and the camera 13 may be configured to perform shooting processing only when a person outside door D is detected.

[0015] The processing unit 11 is a functional unit that performs facial recognition based on images supplied from the camera 13, and is composed of, for example, a CPU (Central Processing Unit) and memory. Information of users who have the right to open door D is pre-written in the memory. The user information includes the facial features of that user. The CPU of the processing unit 11 extracts the facial features from the images supplied from the camera 13 and performs facial recognition by comparing them with the facial features of each user stored in memory. Specifically, it determines that authentication is OK if there is a user whose features match, and that authentication is NG if there is no user whose features match.

[0016] The switch element 12 is a single-pole double-throw switch having a common terminal COM, a normally closed terminal NC, and a normally open terminal NO. The common terminal COM is connected to a grounding wire provided in the door lock release motor control unit 20 by a cable C3 laid through the door D. The normally open terminal NO is connected to an input terminal in in the door lock release motor control unit 20 by a cable C1 laid through the door D. The normally closed terminal NC is not connected anywhere and constitutes an open end.

[0017] The connection state of the switch element 12 is controlled by the processing unit 11. Specifically, the processing unit 11 initially connects the common terminal COM of the switch element 12 to the normally closed terminal NC. As will be explained in more detail later, in this case, door D is always locked. Then, when the authentication result is OK, the processing unit 11 switches the connection to the common terminal COM to the normally open terminal NO. As will also be explained in more detail later, in this case, door D is unlocked, and the user can open door D. If the authentication result is NG, the processing unit 11 maintains the state in which the common terminal COM is connected to the normally closed terminal NC. This keeps door D locked, preventing the user who failed authentication from opening door D.

[0018] Here, the facial recognition terminal 10 can support one or more of the following authentication methods in addition to facial recognition: card reading authentication, QR code reading authentication, PIN authentication, fingerprint authentication, iris authentication, and vein authentication. In this case, the processing unit 11 should control the connection destination of the common terminal COM to the normally open terminal NO when authentication is successful using any one of the authentication methods. This allows the user to open the door D using authentication methods other than facial recognition.

[0019] The door lock release motor control unit 20 is composed of a processing unit 21 and a resistance element 22. The motor 30 is a device for electrically opening and closing the lock installed on the door D. The type of the lock is not particularly limited. For example, it may be a type using a motor, or a type using a solenoid or an electromagnet. The processing unit 21 is a CPU or an integrated circuit having an input terminal in and a ground terminal GND, and controls the operation of the motor 30 according to the potential between the input terminal in and the ground terminal GND, thereby playing a role in opening and closing the lock of the door D.

[0020] The input terminal in is a terminal set to high impedance and is connected to the normally open terminal NO via the cable C1. The cable C1 is also connected to the power wiring via the resistance element 22. The ground terminal GND is connected to the common ground wiring together with the cable C3. Thus, when the common terminal COM of the switch element 12 is connected to the normally closed terminal NC, a relatively high potential is supplied to the input terminal in, and when the common terminal COM of the switch element 12 is connected to the normally open terminal NO, a relatively low potential is supplied to the input terminal in. Hereinafter, when the former potential is "high" and the latter potential is "low", the processing unit 21 controls the operation of the motor 30 to unlock the door D when the potential of the input terminal in changes to "low", and controls the operation of the motor 30 to lock the door D when the potential of the input terminal in changes to "high". Thereby, the locking and unlocking of the door D by the processing unit 11 of the face recognition terminal 10 as described above are realized.

[0021] Here, it is preferable that the processing unit 11 of the face recognition terminal 10 switches the connection destination of the common terminal COM to the normally open terminal NO, and then switches the connection destination of the common terminal COM to the normally closed terminal NC when a predetermined time has elapsed. Further, even when the motor 30 is controlled by the processing unit 21 to lock the door D, when the door D is open, it is preferable to wait for locking until the door D closes. By doing so, after the user opens the door D, it will return to the locked state at the timing when the door D closes, so it is possible to prevent the door D from being left in the unlocked state.

[0022] As described above, according to the door lock system 100, it becomes possible to automatically lock and unlock the door D according to the authentication result at the face authentication terminal 10. However, the door lock system 100 has a problem that if a malicious person cuts the cable C1 and connects the cut point on the input terminal in side to the ground terminal, the door D can be illegally unlocked. To prevent this, it is conceivable to use a pulse signal as in Patent Document 1. However, as described above, if the cable connecting the pulse generation unit and the switch control unit is cut and a pulse signal is illegally applied, the door D can still be illegally unlocked. The door lock system 1 according to the present embodiment solves such problems so that illegal unlocking of the door D can be more reliably prevented. Hereinafter, the configuration and operation of the door lock system 1 will be described in detail.

[0023] FIGS. 1 and 2 are diagrams showing the configuration of the door lock system 1 according to an embodiment of the present invention. FIG. 1 shows the state where the door D is locked, and FIG. 2 shows the state where the door D is unlocked. As can be understood by comparing these figures with FIG. 5, the door lock system 1 is different from the door lock system 100 in that it has a door lock illegal unlocking prevention device 40 between the door D and the door lock release motor control unit 20. Hereinafter, the description will focus on the differences.

[0024] The door lock unauthorized release prevention device 40 comprises a processing unit 41, resistor elements 42a and 42b, and an error reset switch 43. The processing unit 41 is a functional unit including a CPU or integrated circuit, and has input terminals a and b, a ground terminal GND, and an output terminal out as an interface with the outside. In the door lock system 1, cable C1 is provided to connect the normally open terminal NO (first selection terminal) and input terminal a (first input terminal) in the switch element 12, and is not connected to the input terminal in of the processing unit 21. Cable C3 is connected to the ground wiring provided in the door lock release motor control unit 20, as well as to the ground wiring provided in the door lock unauthorized release prevention device 40. Therefore, the ground potential of the door lock release motor control unit 20 and the ground potential of the door lock unauthorized release prevention device 40 are common. Cable C3 is also connected to the ground terminal GND of the processing unit 41. Input terminal b (the second input terminal) is connected to the normally closed terminal NC (the second selectable terminal) of the switch element 12 via cable C2, which is laid through door D. Cables C1 and C2 are connected in common to a power supply wiring that is supplied with a power potential of, for example, +5V, via resistor elements 42a and 42b, respectively.

[0025] The output terminal out of the processing unit 41 is connected to the input terminal in of the processing unit 21 via cable C4. Cable C4 is also connected to the power supply wiring via resistor element 22. The power supply potential supplied to the power supply wiring to which the resistor elements 42a and 42b are connected may be the same as or different from the power supply potential supplied to the power supply wiring to which resistor element 22 is connected.

[0026] The error reset switch 43 is a single-pole, single-throw switch installed on the inside of door D, and is configured to be turned on and off by a user inside door D. The door lock system 1 is operated with the error reset switch 43 in the OFF position. The error reset switch 43 is connected to the processing unit 41 and plays a role in controlling the transition of the processing unit 41's operating mode. Specifically, the processing unit 41 is configured to operate in either normal mode or error mode. The transition from normal mode to error mode is possible regardless of the ON / OFF state of the error reset switch 43, while the transition from error mode to normal mode is only permitted when the error reset switch 43 is ON. Conversely, when the error reset switch 43 is OFF, the processing unit 41 is prohibited from transitioning from error mode to normal mode.

[0027] The processing unit 41 controls the potential of the output terminal out (i.e., the potential supplied to the door lock release motor control unit 20) in accordance with the change in the combination (a,b) of the potentials of input terminal a and input terminal b, thereby controlling the locked state of door D. The processing unit 41 is also configured to operate in either normal mode or error mode. Details of each operating mode will be described later, but the initial state of the processing unit 41 is normal mode. Hereafter, if we denote a potential of "high" as "1" and a potential of "low" as "0", the specific processing performed by the processing unit 41 is as shown in Table 1 below.

[0028] [Table 1]

[0029] To explain the contents of Table 1, the processing unit 41 first controls the potential of the output terminal out to high while maintaining the normal mode, in response to the change in (a,b) to (1,0) when it is entered in normal mode. As a result the potential of the input terminal in becomes high, the processing unit 21 in the door lock release motor control unit 20 controls the operation of the motor 30 to lock the door D. Therefore, the door D becomes locked.

[0030] Next, the processing unit 41, in response to the change in (a,b) to (0,1) while in normal mode, maintains normal mode and controls the potential of the output terminal out to low. As a result, the potential of the input terminal in becomes low, and the processing unit 21 controls the operation of the motor 30 to unlock door D. Therefore, door D becomes unlocked.

[0031] On the other hand, when the processing unit 41 is in normal mode, if (a,b) changes to (0,0) or (1,1), it enters error mode and controls the potential of the output terminal out to high. In this case, the door D is kept locked.

[0032] Next, the processing unit 41, which is entered into error mode, enters normal mode when (a,b) changes to (1,0) while the error reset switch 43 is ON. If the error reset switch 43 is not ON, the processing unit 41 will remain in error mode even if (a,b) changes to (1,0). In addition, the processing unit 41 controls the potential of the output terminal out to high regardless of the operating mode after the change in (a,b). In this case as well, the door D remains locked.

[0033] Finally, if the system is in error mode, the processing unit 41 controls the potential of the output terminal out to high, while maintaining the error mode, depending on whether (a,b) has changed to (0,1), (0,0), or (1,1). In this case as well, the door D remains locked.

[0034] Here, the processing unit 41 is configured to perform filtering on the inputs to input terminals a and b. Filtering here is a software process to remove changes that last for less than a predetermined time (hereinafter referred to as the "cutoff time"). Specifically, the inputs to input terminals a and b may change temporarily due to external noise pulses that occur as single pulses with a width of several microseconds to tens of microseconds, a state in which the common terminal COM, which occurs on the order of several milliseconds when the switch element 12 is switched, is not connected to either the normally open terminal NO or the normally closed terminal NC, and chattering that occurs when the switch element 12 is switched. If the locking state of the door D or the operating mode of the processing unit 41 changes due to such temporary changes, the door D may be unlocked or locked at an inappropriate timing, or the operating mode of the processing unit 41 may change. Therefore, when the processing unit 41 determines the change in (a,b), it is configured to remove temporary changes in the inputs to input terminals a and b by determining whether the detected change lasted for longer than the cutoff time.

[0035] Figure 3 is a processing flow diagram showing the operation of the door lock unauthorized release prevention device 40 (specifically, its processing unit 41). The processing performed by the processing unit 41 will be explained in more detail below, with reference to Figure 3.

[0036] When the power to the door lock unauthorized release prevention device 40 is turned on, the processing unit 41 enters normal mode (step S1) and monitors the change in the combination of the potentials of input terminal a and input terminal b (a,b) (steps S2, S5, S8). As a result, if it is detected in step S2 that (a,b) has changed to (1,0), the processing unit 41 determines whether the changed state continued for the interruption time (step S3). If it determines that it did not continue, it returns to monitoring the change in (a,b). On the other hand, if it determines that it did continue, it controls the potential of output terminal out to high (step S4). As a result, the door D is locked, as described above.

[0037] Next, if step S5 detects that (a,b) has changed to (0,1), the processing unit 41 determines whether the changed state continued for the interruption time (step S6). If it determines that it did not continue, it returns to monitoring the change in (a,b). On the other hand, if it determines that it did continue, it controls the potential of the output terminal out to low (step S7). As a result, as described above, door D is unlocked.

[0038] Next, if step S8 detects that (a,b) has changed to (1,1) or (0,0), the processing unit 41 determines whether the changed state continued for the interruption time (step S6). If it determines that it did not continue, it returns to monitoring the change in (a,b). On the other hand, if it determines that it did continue, it controls the potential of the output terminal out to high and enters error mode (step S7). At this time, door D is locked.

[0039] In step S10, the processing unit 41 enters error mode and determines whether the error reset switch 43 is ON or OFF (step S11). If it is OFF, it repeatedly performs only the determination in step S11. Therefore, as long as the error reset switch 43 is OFF, the processing unit 41 cannot exit error mode.

[0040] If the error reset switch 43 is determined to be ON in step S11, the processing unit 41 then determines whether (a,b) has changed to (1,0) (step S12). If it detects that (a,b) has changed to (1,0), the processing unit 41 determines whether the changed state has continued for the cutoff time (step S13). If it determines that it has not continued, it returns to step S11. On the other hand, if it determines that it has continued, it controls the potential of the output terminal out to high and enters normal mode (step S14), and returns to step S2.

[0041] The processing performed by the processing unit 41 has been explained in detail with reference to the processing flow diagram. Next, returning to Figures 1 and 2, we will explain the operation of the door lock system 1 when a malicious person cuts cables C1, C2, and C3. Table 2 below shows the changes in (a,b) when processing such as cutting cables C1, C2, and C3 is performed in the state shown in Figure 1 (the combination of potentials (a,b) of input terminals a and b is (1,0) and door D is locked), the operating mode of the processing unit 41 after processing, the potential of the output terminal out, and the lock state. Note that "Processing after cutting" in Table 2 indicates the processing performed by the user after cutting the corresponding cable.

[0042] [Table 2]

[0043] As shown in Table 2, if cable C1 is cut first, (a,b) does not change and remains (1,0). Therefore, the operating mode and the potential of the output terminal out also do not change, and door D remains locked. If the facial recognition terminal 10 authenticates OK after cable C1 is cut, the connection destination of the common terminal COM switches to the normally open terminal NO, but since cable C1 is cut, the potential of input terminal a remains high. Therefore, (a,b) changes to (1,1) and the processing unit 41 enters error mode, and as a result, door D remains locked. On the other hand, if a malicious user grounds input terminal a or connects it to the normally closed terminal NC or common terminal COM after cable C1 is cut, (a,b) changes to (0,0). In this case as well, the processing unit 41 enters error mode, and as a result, door D remains locked.

[0044] Next, if cable C2 or cable C3 is cut, if both cables C1 and C2 are cut, or if all of cables C1 to C3 are cut, (a,b) changes to (1,1) and the processing unit 41 enters error mode, and door D remains locked. Since the processing unit 41 has entered error mode, door D will remain locked unless the power to the door lock unauthorized release prevention device 40 is turned off and on by a maintenance worker.

[0045] Furthermore, if a pseudo-authentication terminal capable of performing the same operation as the facial recognition terminal 10 is connected to the input terminals a and b and the ground terminal GND of the processing unit 41, a malicious user may change (a,b) to (0,1). However, even in such a case, since the processing unit 41 has entered error mode, the door D will remain locked regardless of the change in (a,b). Therefore, it can be said that the door lock system 1 makes it possible to prevent unauthorized unlocking of the door without using pulse signals.

[0046] Now, focusing again on steps S11 to S14 in Figure 3, the processes in steps S11 to S14 are designed to allow those involved in the installation of the door lock system 1 to clear the error mode of the door lock unauthorized release prevention device 40. Those involved in the installation may include the person who requested the installation of the door lock system 1 (e.g., the building owner), the person who carried out the installation of the door lock system 1 (e.g., the building management company), and the person who performs maintenance and operation of the door lock system 1 (e.g., the building manager).

[0047] Although not shown in the diagram, door D is also equipped with a physical lock in addition to the electric lock. If the door lock unauthorized release prevention device 40 enters error mode due to a cable being cut by a malicious user, and door D cannot be opened by normal facial recognition, the installer can open door D using the master key for the physical lock, repair the severed cable, and then turn on the error reset switch 43. Since (a,b) has changed to (1,0) due to the cable repair, the processing unit 41 can be returned to normal mode by the processing in steps S11 to S14. In this way, the installer of the door lock system 1 can clear the error mode of the door lock unauthorized release prevention device 40.

[0048] As described above, the door lock unauthorized release prevention device 40 and door lock system 1 according to this embodiment control the lock state of door D in accordance with the change in the potential combination (a,b) of input terminals a and b, thereby preventing unlocking by cutting cables C1 to C3. Therefore, unauthorized unlocking of door D can be prevented without using pulse signals, making it possible to prevent unauthorized unlocking of door D more reliably than in the conventional method.

[0049] Furthermore, by opening door D with the master key, repairing the severed cable, and then turning on the error reset switch 43, it becomes possible to deactivate the error mode of the door lock unauthorized release prevention device 40.

[0050] Although preferred embodiments of the present invention have been described above, the present invention is not limited in any way to these embodiments, and it goes without saying that the present invention can be implemented in various forms without departing from its essence.

[0051] For example, the operating mode of the processing unit 41 may be written to non-volatile memory, so that even if the door lock unauthorized release prevention device 40 is powered off or on, the processing unit 41 can maintain its previous operating mode by referring to the non-volatile memory. In addition, instead of step S1 in Figure 3, the processing unit 41 may be configured to perform a process to determine its operating mode, and if it is in normal mode, it will process from step S2, while if it is in error mode, it will process from step S11. This prevents the error mode from being canceled by powering off or on the door lock unauthorized release prevention device 40 while it is in error mode. However, powering off or on the door lock unauthorized release prevention device 40 when the door D is not open requires powering off or on the entire room or building at the distribution board, etc., and normally, only the aforementioned installation personnel can perform such power off / on operations, so even if the configuration described in the above embodiment is adopted, it is usually not a problem.

[0052] Furthermore, the door lock unauthorized release prevention device 40 may be equipped with a communication function such as a wireless LAN, and when the processing unit 41 detects that (a,b) has changed to (1,1) or (0,0), it may use the above communication function to notify the person responsible for installation. In this way, the person responsible for installation will be able to respond quickly to cable cutting by a malicious user.

[0053] Alternatively, instead of cable C4, short-range wireless communication such as Bluetooth (registered trademark) may be used. In this case, the processing unit 41 is configured to control the locked state of door D by a digital signal transmitted via short-range wireless communication, instead of controlling the potential of the output terminal out. The processing unit 21 is configured to control the operation of motor 30 according to the digital signal received from processing unit 41. In this case, cable C3 may not be connected to the grounding wiring in the door lock release motor control unit 20, thereby making the connection between the door lock release motor control unit 20 and the door lock unauthorized release prevention device 40 completely wireless.

[0054] Alternatively, an automatic door Da may be used instead of door D. In this case, it is preferable to configure the processing unit 41 to control an automatic door opening / closing motor control unit for controlling the opening and closing of the automatic door Da, in addition to the door lock release motor control unit 20. A specific modification of the door lock system 1 having such a processing unit 41 will be described below.

[0055] Figure 4 shows the configuration of a door lock system 1 according to a modified version of the above embodiment. In this modified version, an automatic door Da is used instead of door D. Furthermore, the door lock system 1 according to this modified version is further configured to include an automatic door opening / closing motor control unit 31, a sensor 32, and a motor 33. The sensor 32 is a sensor for detecting passersby and is composed of an optical sensor, a radio wave sensor, a touch sensor, or a sensor that detects slight door movements (e.g., a vibration sensor). The motor 33 is a device for electrically opening and closing the automatic door Da. The automatic door opening / closing motor control unit 31 controls the operation of the motor 33 according to the detection results of the sensor 32, thereby opening and closing the automatic door Da in response to the presence of passersby.

[0056] The processing unit 41 in this modified configuration further includes an output terminal out2. The output terminal out2 is connected to the input terminal in of the automatic door opening / closing motor control unit 31. The automatic door opening / closing motor control unit 31 is configured to open the automatic door Da in response to a "door open command" being supplied to the input terminal in, regardless of the detection result of the sensor 32. In other words, the automatic door opening / closing motor control unit 31 is configured to open the automatic door Da while a "door open command" is supplied to the input terminal in, and to ignore the detection result of the sensor 32. If the supply of a "door open command" to the input terminal in is stopped while the automatic door opening / closing motor control unit 31 is performing the process of opening the automatic door Da, the automatic door opening / closing motor control unit 31 may continue or stop the process of opening the automatic door Da.

[0057] Specifically, the "door open command" involves raising the potential of the input terminal in to a predetermined potential (e.g., +5V) for a certain period of time (e.g., 500 milliseconds). In other words, the "door open command" is a single pulse signal with a pulse width of, for example, 500 milliseconds. The processing unit 41 is configured to control the potential of the output terminal out to low in order to unlock the automatic door Da, and then, after a predetermined delay time has elapsed, to output the "door open command" from the output terminal out2 for the aforementioned certain period of time. This makes it possible to not only unlock but also open the automatic door Da when the authentication result of the facial recognition terminal 10 is OK.

[0058] The reason for the predetermined delay time mentioned above is that a certain amount of time is required for the control to unlock the lock. This certain amount of time is mainly the time required for the deadbolt that constitutes the lock to move, and in a typical example it is about 2 seconds. It is preferable that the specific value of the predetermined delay time and the specific value of the time for which the processing unit 41 continues to output the "door open command" from the output terminal out are set in the non-volatile memory within the processing unit 41, and that the processing unit 41 executes the above process according to these values ​​set in the non-volatile memory. It is also preferable that these values ​​set in the non-volatile memory be changeable from the outside. When using a lock without a deadbolt, such as an electromagnetic lock, the delay time may not be set.

[0059] In this modified configuration, if (a,b) changes during the delay time and the potential of the output terminal out is controlled to be high, it is preferable that the processing unit 41 stops outputting the "door open command" from the output terminal out2. This prevents the automatic door opening / closing motor control unit 31 from forcibly opening a locked automatic door Da, and prevents the door lock release motor control unit 20 from attempting to lock an open automatic door Da. However, once the processing unit 41 has started outputting the "door open command," it is preferable that it continues outputting the "door open command" for the specified period of time until the end, even if the potential of the output terminal out is controlled to be high during the output of the "door open command." This prevents malfunction of the automatic door opening / closing motor control unit 31. [Explanation of symbols]

[0060] 1,100 Door Locking System 10. Facial Recognition Terminal 11,21,41 Processing Unit 12 Switching elements 13 Cameras 20 Door lock release motor control unit 22, 42a, 42b Resistor elements 30,33 motors 31 Sensors 32 Automatic door opening / closing motor control unit 40. Door lock unauthorized release prevention device 43 Error Reset Switch a,b Input terminals of the processing unit 41 C1~C4 Cable COM common terminal of switch element 12 Door D Automatic Door Grounding terminals of GND processing units 21 and 41 in processing unit 21, input terminal of automatic door opening / closing motor control unit 32 NC processing unit 41's normally closed terminal NO Processing Unit 41 Normal Open Terminal out, out2 Output terminals of processing unit 41

Claims

1. A switch element having a common terminal and first and second selectable terminals, A processing unit that switches the connection destination of the common terminal between the first and second selection terminals according to the authentication result, An automatic door control device connected via an automatic door to an authentication terminal having, The automatic door is controlled to be in the open state in accordance with the change in the combination of the potential of a first input terminal connected to the first selection terminal via the door and the potential of a second input terminal connected to the second selection terminal via the door. Automatic door control device.

2. The aforementioned automatic door is configured to be lockable, The automatic door is unlocked when the aforementioned combination becomes a predetermined combination, and then, after a predetermined delay time has elapsed, the automatic door is controlled to be in the open state. The automatic door control device according to claim 1.

3. Depending on the change in the combination during the aforementioned delay time, the control of the automatic door to the open state is discontinued. The automatic door control device according to claim 2.

4. An automatic door control device according to any one of claims 1 to 3, A motor that electrically opens and closes the aforementioned automatic door, The system includes an automatic door opening / closing motor control unit that drives the motor, The automatic door control device controls the automatic door to be in the open state by supplying a door open command to the automatic door opening / closing motor control unit. The automatic door opening / closing motor control unit is configured to maintain the automatic door in the open state while the automatic door control device is supplying the door open command. Automatic door control system.

5. Equipped with sensors to detect pedestrians, The automatic door opening / closing motor control unit is configured to control the motor according to the detection result of the sensor when no door open command is supplied from the automatic door control device, while ignoring the detection result of the sensor when a door open command is supplied from the automatic door control device. The automatic door control system according to claim 4.

6. The aforementioned door open command is a single pulse signal with a predetermined time width. The automatic door control system according to claim 5.

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