JP2016000910A - Electric lock control unit and electric lock system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control unit of electric lock and an electric lock system capable of improving the reliability.SOLUTION: A control unit 1 of electric lock includes: a drive unit 12 that drives a motor 31 included in an electric lock 3; a control section 11 that controls the operation of the drive unit 12; a battery 13 that supplies the power to the motor 31 and the control section 11; a temperature sensor 14 that detects the operating temperature on the battery 13. The control unit 1 also includes a current adjustment section 15 that adjusts the current supplied from the battery 13 to the motor 31 via the drive unit 12. The control section 11 controls the current adjustment section 15 to adjust the current supplied to the motor 31 corresponding to the operating temperature detected by the temperature sensor 14.

Description

  The present invention relates to an electric lock control device and an electric lock system, and more particularly to an electric lock control device and an electric lock system using a battery as a power source.

  2. Description of the Related Art Conventionally, an electric lock system has been provided in which a user controls the locking and unlocking of a door by holding a non-contact electronic key (for example, an IC card) over a reader provided on the door (for example, Patent Document 1). reference).

  The electric lock system described in Patent Document 1 includes an electric thumb turn, a control unit, and the like on the indoor side of the door in order to lock and unlock the door. The electric thumb turn includes a motor, a power transmission mechanism, and the like. The power transmission mechanism transmits the driving force of the motor to the locking / unlocking mechanism. The electric lock system includes a locking / unlocking mechanism embedded in the door. The locking / unlocking mechanism has a dead bolt that can freely project and retract, and locks and unlocks the door when the dead bolt projects and sinks.

  That is, the control unit drives and drives the dead bolt included in the locking / unlocking mechanism via the power transmission mechanism. Further, the control unit switches the rotation direction of the motor by reversing the direction of the current flowing through the motor depending on the output signal of the reader in the case of locking and unlocking.

  For example, when the user locks the door, the IC card is held over a reader provided on the outdoor door. Then, the control unit rotates the motor in the forward direction and causes the dead bolt to protrude outward, thereby locking the door. When the user wants to unlock the door, the user holds the IC card over the locked door reader. Then, the control unit reversely rotates the motor, stores the dead bolt in the door, and unlocks the door.

  In addition, a remote locking / unlocking device (control device) using a battery as an internal power supply is provided (for example, see Patent Document 2). In the remote locking / unlocking device described in Patent Literature 2, when the battery voltage is detected and the detected battery voltage falls below a predetermined lower limit value, the user is notified of battery exhaustion by a buzzer or LED display.

JP 2013-44160 A JP 2005-76198 A

  By the way, in the conventional example described in Patent Document 2, when the power of the motor is supplied from a battery, the following problems occur. That is, in the low temperature environment, the degree of voltage (terminal voltage) decrease due to the motor current is greater than in the normal temperature environment. As a result, the terminal voltage falls below the voltage required for the motor and control unit. Therefore, there is a problem that the control unit stops the control operation in spite of the fact that the battery capacity is actually sufficient and the reliability is lowered.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an electric lock control device and an electric lock system that improve reliability.

  The electric lock control device of the present invention includes a drive unit that drives a motor included in the electric lock, a control unit that controls the operation of the drive unit, a battery that supplies power to the motor and the control unit, and use of the battery A temperature sensor that detects a temperature; and a current adjustment unit that adjusts a current supplied from the battery to the motor via the drive unit. The control unit corresponds to the use temperature detected by the temperature sensor. Then, the current adjusting unit is controlled to adjust the current supplied to the motor.

  The electric lock system according to the present invention includes an operation device, the control device, and an electric lock having a motor. And the control unit of the control device controls the operation of the driving unit in accordance with the signal.

  The electric lock control device and electric lock system of the present invention have an effect of improving reliability.

It is a block diagram which shows embodiment of the control apparatus of the electric lock which concerns on this invention. It is a circuit diagram which shows the drive part in the same as the above. It is a system configuration figure showing an embodiment of an electric lock system concerning the present invention. It is a block diagram same as the above.

  Hereinafter, embodiments of an electric lock control device 1 and an electric lock system according to the present invention will be described with reference to FIGS. 1 to 4.

  The configuration of the control device 1 of the present embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the control device 1 includes a control unit 11, a drive unit 12, a battery 13, a temperature sensor 14, and a current adjustment unit 15. Control device 1 preferably includes switching unit 16, notification unit 17, and power supply circuit 18.

  The control unit 11 includes, for example, a microcontroller (not shown), and is connected to the drive unit 12, the switching unit 16, and the notification unit 17. The control unit 11 performs a process of controlling the motor 31 via the drive unit 12 when a microcontroller (hereinafter abbreviated as a microcomputer) executes a program.

  The drive unit 12 is configured to drive a motor 31 included in an electric lock 3 to be described later, and has connection terminals 1251 and 1252 and is connected to the motor 31 via the connection terminals 1251 and 1252 as shown in FIG. Is done.

  The drive unit 12 is an H bridge circuit configured by PMOSFETs 1231 and 1232 made of P-channel type MOSFETs, NMOSFETs 1233 and 1234 made of N-channel type MOSFETs, and a plurality of resistors. The drive unit 12 is provided with two drive terminals 121 and 122. The drive terminal 121 is supplied with electric power directly from the battery 13 or via the current adjustment unit 15, and the drive terminal 122 is connected to the ground. Furthermore, the drive unit 12 includes control terminals 1241, 1242, 1243, and 1244. The control terminal 1241 is connected to the gate of the PMOSFET 1231, and the control terminal 1242 is connected to the gate of the PMOSFET 1232. The control terminals 1241 and 1242 are connected to different output ports of the control unit 11. That is, the control unit 11 is connected to the gates of the PMOSFETs 1231 and 1232 via the control terminals 1241 and 1242. The control terminal 1243 is connected to the gate of the NMOSFET 1233, and the control terminal 1244 is connected to the gate of the NMOSFET 1234. Further, the control terminals 1243 and 1244 are connected to different output ports of the control unit 11. That is, the control unit 11 is connected to the gates of the NMOSFETs 1233 and 1234 through the control terminals 1243 and 1244.

  For example, the battery 13 is preferably a chemical battery such as an alkaline battery. However, a secondary battery such as a lithium ion battery may be used. The battery 13 supplies power to the control unit 11 and the drive unit 12. Furthermore, if necessary, the battery 13 may supply power to the temperature sensor 14, the notification unit 17, the operation device 2 described later, and the like.

  The temperature sensor 14 preferably uses, for example, a positive thermistor. The temperature sensor 14 is preferably arranged near the battery 13 in order to detect the use temperature (atmospheric temperature) of the battery 13.

  The current adjustment unit 15 is preferably configured with a resistor, for example. The current adjusting unit 15 reduces the current flowing through the motor 31 by the current limiting action of the resistor. However, the current adjustment unit 15 may be configured by a series regulator capable of controlling current, for example, an LDO (Low Drop Out) regulator. The LDO regulator can control the current flowing through the motor 31 because no current exceeding the set output current value is output.

  The switching unit 16 includes a first switching unit 161 and a second switching unit 162, and a path (feeding path) for passing a current from the battery 13 to the motor 31 via the driving unit 12 is a first feeding path and a second feeding path. It is configured to selectively switch to the road. The 1st switching part 161 and the 2nd switching part 162 are comprised by a latching relay, for example. The first switching unit 161 includes a common terminal 1611, a first switching terminal 1612, and a second switching terminal 1613, and the common terminal 1611 is selected as one of the first switching terminal 1622 and the second switching terminal 1623. Switch to connect. The second switching unit 162 includes a common terminal 1621, a first switching terminal 1622, and a second switching terminal 1623, and the common terminal 1621 is selected as one of the first switching terminal 1622 and the second switching terminal 1623. Switch to connect.

  The common terminal 1611 of the first switching unit 161 is connected to the positive electrode of the battery 13. The first switching terminal 1612 of the first switching unit 161 is connected to the first switching terminal 1622 of the second switching unit 162. The second switching terminal 1613 of the second switching unit 162 is connected to the input terminal 151 of the current adjusting unit 15. The second switching terminal 1623 of the second switching unit 162 is connected to the output terminal 152 of the current adjusting unit, and the common terminal 1621 is connected to the driving terminal 121 of the driving unit 12.

  The first feed path is a current path that passes through the common terminal 1611, the first switch terminal 1612, the first switch terminal 1622 of the second switch unit 162, and the common terminal 1621 of the first switch unit 161. That is, the first power supply path is configured to pass a current to the motor 31 without passing through the current adjustment unit 15. The second feeding path is a current path that passes through the common terminal 1611, the second switching terminal 1613, the current adjustment unit 15, the second switching terminal 1623 of the second switching unit 162, and the common terminal 1621 of the first switching unit 161.

  The notification unit 17 includes a light emitting element such as an LED. In addition, the notification unit 17 may include a device that emits a buzzer or the like instead of the light emitting element or together with the light emitting element. In addition, the alerting | reporting part 17 is controlled by the control part 11, and is comprised so that a light emitting element may be light-emitted, or a buzzer will sound.

  The power supply circuit 18 stabilizes the output voltage of the battery 13 to generate a control voltage, and supplies the control voltage to the control unit 11, the PMOSFETs 1231 and 1232 and the NMOSFETs 1233 and 1234 of the driving unit 12.

  First, the basic operation of the control device 1 will be described with reference to FIG. 1 and FIG.

  For example, when receiving a locking instruction from the operation device 2 to be described later, the control unit 11 controls the drive unit 12 to rotate the motor 31 forward. Specifically, the control unit 11 applies a voltage to the gates of the PMOSFET 1231 and the NMOSFET 1234 via the control terminals 1241 and 1244, and switches the PMOSFET 1231 and the NMOSFET 1234 on. Therefore, the control unit 11 rotates the motor 31 in the forward direction by controlling the drive unit 12 so that a current flows through the motor 31 in the direction from the connection terminal 1251 to the connection terminal 1252.

  For example, when receiving an unlocking instruction from the controller device 2, the control unit 11 controls the driving unit 12 to rotate the motor 31 in the reverse direction. Specifically, the control unit 11 applies a voltage to the gates of the PMOSFET 1232 and the NMOSFET 1233 via the control terminals 1242 and 1243, and switches the PMOSFET 1232 and the NMOSFET 1233 on. Therefore, the control unit 11 reversely rotates the motor 31 by controlling the driving unit 12 so that a current flows through the motor 31 in the direction from the connection terminal 1252 to the connection terminal 1251.

  In addition, the control part 11 will switch off PMOSFET1231,1232, and NMOSFET1233, 1234, when operation | movement of locking / unlocking is complete | finished.

  By the way, as explained in the prior art, in a low temperature environment, the degree of decrease in battery voltage due to the motor current is larger than in a normal temperature environment. Therefore, the control device 1 of the present embodiment includes the temperature sensor 14 and the current adjustment unit 15. The control unit 11 causes the current adjustment unit 15 to reduce the current when the use temperature (atmosphere temperature) is lowered. Hereinafter, the operation of the control unit 11 will be described in detail with reference to FIGS. 1 and 2.

  When receiving the locking / unlocking instruction from the controller device 2, the control unit 11 takes in the sensor output of the temperature sensor 14 from the input port. The sensor output of the temperature sensor 14 is a voltage value corresponding to the ambient temperature. The control unit 11 compares the sensor output with a threshold voltage (reference temperature) stored in advance in the recording unit.

  When the sensor output is higher than the threshold voltage, the control unit 11 switches the switching unit 16 to the first power supply path, and then controls the driving unit 12 to flow current to the motor 31.

  When the sensor output is lower than the threshold voltage, the control unit 11 switches the switching unit 16 to the second power supply path, and then controls the driving unit 12 to flow current to the motor 31. In this case, since the current supplied from the battery 13 to the motor 31 is reduced by the current adjusting unit 15, it is possible to suppress a decrease in the terminal voltage of the battery 13. Here, if the electric current which flows into the motor 31 reduces, the rotational speed of the motor 31 will fall and the operation | movement of the electric lock 3 mentioned later will become slower than the normal temperature. Since the operation of the electric lock 3 becomes slow, for example, the user may feel mental stress in the operation of the electric lock 3. In addition, for example, there is a possibility that the user misunderstands that a failure has occurred in the electric lock 3. Therefore, it is preferable that the control unit 11 causes the notification unit 17 to notify the user that locking / unlocking is operating at a low speed.

  When the current adjustment unit 15 is configured by a series regulator or the like, the control unit 11 may turn the current adjustment unit 15 on or off instead of switching the power feeding path. For example, there is a regulator IC having a function of turning on and off the regulator circuit by an external signal. That is, the control unit 11 can switch between a state in which the current flowing through the motor 31 is reduced by the regulator circuit and a state in which the current from the battery 13 is directly passed through the motor 31 by passing through the regulator circuit.

  Next, the structure of the electric lock system of this embodiment is demonstrated with reference to FIG. 3 and FIG.

  The electric lock system includes a control device 1, an operation device 2, and an electric lock 3.

  The controller device 2 includes an indoor operation unit 21 provided on the indoor side surface of the door and a reader 22 provided on the outdoor side surface of the door.

  The indoor operation unit 21 preferably includes a display unit 211 and a locking / unlocking operation unit 212. However, the display unit 211 may also be used as the notification unit 17 of the control device 1.

  The display unit 211 is formed so that a light emitting element (not shown) such as an LED provided in the indoor operation unit 21 can be seen from the surface of the indoor operation unit 21. It is preferable that a picture of a snow crystal or the like is printed on the display unit 211 in order to notify that the locking / unlocking is operating at a low speed. In addition, a battery picture or the like is preferably printed on the display unit 211 in order to notify the remaining amount of the battery 13. The control unit 11 can notify the user by the display unit 211 by controlling the light emitting element to be turned on and off from the back of the snow crystal or battery picture. By the way, the display unit 211 may include a device that emits a buzzer or the like instead of the light emitting element or together with the light emitting element.

  The locking / unlocking operation unit 212 includes a push button switch or the like, and is operated by pressing or the like when the user locks / unlocks the door from the inside. The indoor operation unit 21 is configured to output a signal for instructing locking or unlocking to the control device 11 when the locking / unlocking operation unit 212 is operated.

  The reader 22 authenticates information of the IC card (card key) read by the reading unit 221 and gives an instruction for locking and unlocking to the control unit 11. However, the operation of locking / unlocking is not limited to the IC card. Therefore, the reading unit 221 is not limited to a card reader that reads card key information, and may be a numeric keyboard or the like that allows a user to input a personal identification number.

  The electric lock 3 includes a motor 31 and a power transmission mechanism 32. The electric lock 3 is rotated by rotating the motor 31 forward and causing the power transmission mechanism 32 to project the dead bolt, and the electric lock 3 is rotated reversely and the power transmission mechanism 32 stores the dead bolt and unlocks it.

  The operation of the electric lock system will be described with reference to FIGS. In addition, about the operation | movement which overlaps with description of the above-mentioned control apparatus 1, description is abbreviate | omitted below.

  When the user holds the card key over the reading unit 221, the reader 22 of the operation device 2 authenticates the card key information to the control unit of the control device 1 and instructs locking or unlocking. Further, when the user presses the push button switch, the locking / unlocking operation unit 212 instructs the control unit 11 to lock or unlock. The controller 11 determines whether the motor 31 is locked or unlocked based on the received signal and determines the rotation direction of the motor 31.

  The control unit 11 controls the switching unit 16 according to the sensor output from the temperature sensor 14. The current flowing through the first power supply path or the second power supply path drives the motor 31.

  The control unit 11 preferably informs the display unit 211 of the remaining amount of the battery 13 and the like. Furthermore, it is preferable that the control unit 11 stores a lower limit voltage in advance and causes the display unit 211 to warn when the voltage of the battery 13 falls below the lower limit voltage. The lower limit voltage is preferably a value that predicts that the capacity of the battery 13 will decrease and that the electric lock 3 will no longer operate after a predetermined number of times of locking and unlocking.

  The control device 1 of this embodiment includes a drive unit 12 that drives a motor 31 included in the electric lock 3, a control unit 11 that controls the operation of the drive unit 12, a battery 13 that supplies power to the motor 31 and the control unit 11, and And a temperature sensor 14 for detecting a use temperature of the battery 13. Furthermore, the control device 1 includes a current adjustment unit 15 that adjusts the current supplied from the battery 13 to the motor 31 via the drive unit 12. The control unit 11 controls the current adjusting unit 15 so as to adjust the current supplied to the motor 31 in accordance with the use temperature detected by the temperature sensor 14.

  Therefore, the control device 1 of the present embodiment can reduce the current supplied to the motor 31 in a low temperature environment. Therefore, the control device 1 of the present embodiment prevents the control operation from being stopped despite the remaining amount of the battery, resulting in an improvement in reliability.

  The control device 1 of the present embodiment preferably includes a switching unit 16 that selectively switches the power supply path from the battery 13 to the motor 31 between the first power supply path and the second power supply path. The current adjusting unit 15 is preferably configured to reduce the current flowing through the motor 31. The first power supply path is configured to allow a current to flow through the motor 31 without passing through the current adjustment unit 15. The second power feed path is preferably configured to allow a current to flow through the motor 31 via the current adjustment unit 15. When the operating temperature detected by the temperature sensor 14 is higher than the reference temperature value, the control unit 11 switches the switching unit 16 to the first power feeding path. When the operating temperature detected by the temperature sensor 14 is lower than the reference temperature value, the switching unit 16 is preferably switched to the second power feeding path.

  Therefore, the control device 1 of the present embodiment can adjust the current flowing through the motor 31 by switching to the first feeding path or the second feeding path by the switching unit 16.

  The control device 1 according to the present embodiment preferably includes a notification unit 17 that notifies at least one of light and sound. The control unit 11 preferably causes the notification unit 17 to notify the current adjustment state by the current adjustment unit 15.

  Therefore, the control device 1 of the present embodiment can reduce the user's stress by notifying the user that the movement of the electric lock 3 is slower than the movement at normal temperature.

  In the control device 1 of the present embodiment, the current adjustment unit 15 is preferably configured by a series regulator (LDO regulator).

  Therefore, the control device 1 of the present embodiment can easily secure safety and stability of the current flowing through the motor 31 by using the LDO regulator.

  The electric lock system of this embodiment includes an operation device 2, a control device 1, and an electric lock 3 having a motor 31. When there is a predetermined input, the controller device 2 transmits a signal for requesting locking / unlocking to the control device 1, and the control unit 11 of the control device 1 controls the operation of the drive unit 12 according to the signal. .

  Therefore, the electric lock system according to the present embodiment can perform locking / unlocking in a low temperature environment in accordance with a locking / unlocking instruction from the operation device 2, so that a limited current flows to the motor 31. Improvement can be expected.

DESCRIPTION OF SYMBOLS 1 Control apparatus 11 Control part 12 Drive part 13 Battery 14 Temperature sensor 15 Current adjustment part

Claims (5)

A drive unit that drives a motor included in the electric lock, a control unit that controls the operation of the drive unit, a battery that supplies power to the motor and the control unit, a temperature sensor that detects a use temperature of the battery, and the battery And a current adjusting unit that adjusts a current supplied to the motor via the driving unit,
The control unit according to claim 1, wherein the control unit controls the current adjusting unit to adjust a current supplied to the motor in accordance with the use temperature detected by the temperature sensor. A switching unit that selectively switches the power supply path from the battery to the motor between the first power supply path and the second power supply path;
The current adjustment unit is configured to reduce a current flowing through the motor,
The first power supply path is configured to flow current to the motor without passing through the current adjustment unit, and the second power supply path is configured to flow current to the motor via the current adjustment unit. ,
When the operating temperature detected by the temperature sensor is higher than a reference temperature value, the control unit switches the switching unit to the first power supply path, and the operating temperature detected by the temperature sensor is the reference temperature. 2. The electric lock control device according to claim 1, wherein when the temperature is lower than the temperature value, the switching unit is switched to the second power feeding path.   3. The notification unit according to claim 1, further comprising a notification unit that notifies at least one of light and sound, wherein the control unit causes the notification unit to notify the adjustment state of the current by the current adjustment unit. Electric lock control device.   4. The electric lock control device according to claim 1, wherein the current adjustment unit is configured by a series regulator. 5.   An operation device, a control device according to any one of claims 1 to 4 and an electric lock having a motor, wherein the operation device sends a signal requesting locking / unlocking to the control device when a predetermined input is received. The electric lock system is characterized in that the control unit of the control device controls the operation of the drive unit according to the signal.

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