JPH11217961A - Locking/unlocking direction and lock type judging method for electric lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for properly judging the locking type and the locking/unlocking condition of a lock from a transmitted/received signal via two wires. SOLUTION: When a lock type is judged, power +B is supplied from a supply part 1 for a fixed time to drive an actuator 2 in accordance with a locking signal f42 and an unlocking signal f41 from an electric lock detection switch 3a. Thereafter, power supply from the actuator 2 is stopped and the locking signal f42 and the unlocking signal f41 are input from the electric lock detection switch 3a to judge the lock type from its change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention determines whether an electric lock installed in a door of a house or a building is locked or unlocked, and determines whether the electric lock is energized and unlocked or instantaneously energized and unlocked. More particularly, the present invention relates to a method for determining whether to apply an electric lock and to determine the unlocking direction and lock type using two lines.

[0002]

2. Description of the Related Art Conventionally, an electric lock installed on a door of a house, a building or the like can be operated for locking and unlocking in a living room or the like, and a difference in signals for operating the locking and unlocking is provided. Therefore, there are two types: unlocked when energized and unlocked when momentary energized. In the instantaneous energization locking / unlocking type, the locking and unlocking of the electric lock is performed by applying a pulse signal of a different polarity, that is, a locking direction, a direction predetermined as the unlocking direction. When the lock is in the locked state, the electric lock is unlocked by instantaneously applying a pulse signal in the unlocking direction. In this state, the pulse signal in the locking direction that is energized in the opposite direction to the unlocking direction is instantaneously applied. Even if the power is turned on, it remains locked. Similarly, when the electric lock is in the unlocked state, the electric lock is unlocked by instantaneously applying a pulse signal in the locking direction, and remains in the unlocked state even when the pulse signal in the unlocking direction is applied. On the other hand, the energized locking / unlocking type is such that the locking and unlocking of the electric lock is performed by reversing the current state by energizing regardless of the difference in the energizing direction of the signal, for example, if the electric lock is in the locked state. If the electric lock is in the unlocked state, the electric lock is unlocked by energizing, and the electric lock is locked and unlocked by energizing in the same direction.

[0003]

However, when such an electric lock is installed, the control of application and unlocking differs depending on the direction of energization depending on one of the two types of installed electric locks. Locking and unlocking must be set according to the signal direction. If the setting of the signal direction is performed by the dip switch, an excessive burden is imposed on the consumer.

In addition, the operation of the electric lock in the living room is often installed in an intercom device or the like, and it is necessary to transmit and receive a signal by two wires. It was necessary to appropriately determine the type of the electric lock, that is, the instantaneous energization locking / unlocking type and the energization locking / unlocking type. The present invention has been made in order to solve the above-mentioned drawbacks, and does not impose an excessive burden on a consumer without performing setting by a DIP switch, and appropriately determines the type of an electric lock by transmitting and receiving signals by two wires. It is an object of the present invention to provide a method for determining the direction of application and release of an electric lock and the type of lock that can be performed.

[0005]

SUMMARY OF THE INVENTION To achieve this object, an electric lock application / unlock direction / lock type judging method according to the present invention comprises an actuator for operating a cylinder for locking / unlocking a door and a lock for a cylinder. In determining whether to apply an unlocking type or an instantaneously energizing unlocking type electric lock having an unlocking signal and a detection switch that generates an unlocking signal in conjunction with unlocking, the unlocking direction and the lock type in two lines. 2, energizing the actuator of the electric lock via the two wires, applying the lock signal, the presence or absence of the unlocking signal, determining the unlocking direction, stopping the energization, and locking depending on the presence of the locking signal selected via the two wires The species is determined.

In the method for determining the application / unlock direction / lock type of an electric lock according to the present invention, when the lock type is determined, the power supply for driving the actuator based on the application / release signal from the detection switch is provided. After a certain period of time, the power supply to the actuator is stopped, an application signal from the detection switch and an unlock signal are input, and the lock type is determined based on the change. It can be carried out.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a preferred embodiment of the present invention to which a method for determining the direction of application and release of an electric lock according to the present invention is applied. As shown in FIG. 1, an electric lock device to which the method of determining whether to apply and release an electric lock according to the present invention includes a controller AQ1 and an electric lock BQ1 controlled by the controller AQ1, as shown in FIG. 1. The DC power is supplied from the power supply unit 1 of the controller AQ1 to the actuator 2 of the electric lock BQ1 so that the DC power can be reversed, and a cylinder for locking and unlocking is operated.

The controller AQ1 comprises a power supply section 1 for supplying power to the electric lock BQ1 in the positive and negative directions, and a detection switch 3 for the electric lock BQ1.
a, high frequency signals f1 of a plurality of frequencies corresponding to the number of 3b,
a signal generating circuit 4 for sequentially generating f2, a controller-side balanced transformer 5, and a high-frequency signal f1 generated by the signal generating circuit 4,
The change in the current flowing through the transformer driving circuit 6 for driving the controller-side balanced transformer 5 by f2 and the current flowing through the controller-side balanced transformer 5 which changes depending on the state of the detection switches 3a and 3b are represented by the following equation.
A current-voltage conversion circuit 7 for voltage conversion, an envelope detection circuit 8 for envelope detection of the current-voltage converted signal, and an A / D for analog-to-digital conversion of the envelope-detected signal
A conversion circuit 9 and a signal selection circuit 10 provided in the signal generation circuit 4 for selectively outputting an analog-to-digital converted signal in synchronization with a synchronization signal f3 generated in the signal generation section 4.
And

The signal generating circuit 4 includes an oscillator 11 for generating and transmitting a high-frequency signal f0, a binary counter 12 for dividing the high-frequency signal f0 generated and transmitted from the oscillator 11 into a plurality of high-frequency signals f1, f2, and f3. , Divided high frequency signal
an analog multiplexer 13 that switches and outputs f1 and f2 in response to a synchronization signal f3. The transformer driving circuit 6 receives the power supply + B, and drives the inverters 14a and 14b for driving the controller-side balanced transformer 5 by the high-frequency signals f1 and f2 generated by the signal generating circuit 4, and converts the signals via the inverter 14a into voltages. FET 15a to be controlled and inverter 1
FET 15b for voltage-controlling the signal via 4a, 14b
And capacitors C1 and C2 to supply power + B to the primary coil 5a of the controller-side balanced transformer 5.

The current-voltage conversion circuit 7 converts the current flowing through the controller-side balancing transformer 5 into a current-voltage conversion NPN.
It has a current mirror circuit composed of transistors Tr1 and Tr2, and a resistor R1 that forms a constant current circuit together with the current mirror circuit. The envelope detection circuit 8 performs envelope detection on the signal that has been current-voltage converted by the current-voltage conversion circuit 7,
It has a diode 16 for rectification, a capacitor C3, and a resistor R2.

The A / D conversion circuit 9 has a function of converting the signal detected by the envelope detection circuit 8 from analog to digital. The signal selection circuit 10 includes an analog multiplexer that selects a signal output path in synchronization with a synchronization signal f3 output from the signal generation circuit 4 of a signal that has been subjected to analog-to-digital conversion by the A / D conversion circuit 9.

Relays 17a and 17b to which a DC power supply + B is connected, contacts 18a and 18b which are connected to the DC power supply + B and are switched by the operation of the relay 17b, are connected to the power supply section 1.
There are provided contacts 19a, 19b which are respectively connected to the contacts 18a, 18b and are switched by the operation of the relay 17a. The contacts 19a, 19b are respectively connected in parallel to the secondary coil 5b of the controller-side balanced transformer 5 and the controller-side capacitor C7. Is done. Further, the power supply unit 1 is provided with a transistor Tr3 having a collector connected to the relay 17a, an emitter connected to the reference potential point, and a transistor Tr4 having a collector connected to the relay 17b and an emitter connected to the reference potential point.

The controller AQ1 is provided with a CPU. The CPU has an unlocking / unlocking determining means for determining the locking / unlocking state of the electric lock and the opening / closing state of the door, a lock type determining means for determining whether the electric lock is an instantaneously energized locking / unlocking type or an energized locking / unlocking type, and a storage device for storing the lock type In response to an electric lock drive request signal from an electric lock operation button (not shown), a lock signal f42, an unlock signal f41, a door close signal f52, and a door open signal of the electric lock input from the signal selection circuit 10 are provided. Based on the signal f51, an energization control drive signal f6 for energization control to the base of the transistor Tr3 of the power supply unit 1 is output, the energization control is performed by driving the transistor Tr3, and the energization direction switching control to the base of the transistor Tr4. The drive signal f7 is output, and the transistor Tr4
To control the switching of the energization direction.

The electric lock BQ1 is an electric lock side balance transformer 2
0, a series resonance circuit 21a including a capacitor C4 and a coil L1, a series resonance circuit 21b including a capacitor C5 and a coil L2, and series resonance circuits 21a and 21
The electric lock detection switch 3a and the door detection switch 3b, which are detection switches respectively connected to b, are connected in parallel to the primary coil 20a of the balance transformer 20 on the electric lock side. Here, the electric lock detection switch 3a detects locking and unlocking of the electric lock by closing and opening, and the door detection switch 3b opens and closes the door on which the electric lock is installed by closing and opening. Is to be detected. Further, an electric lock-side capacitor C6 and an actuator 2 connected in parallel to the secondary coil 20b of the electric lock-side balance transformer 20 are provided.

Secondary coil 2 of balance transformer 20 on the electric lock side
0b, electric lock terminal T1, controller terminal T2, secondary coil 5b of controller-side balancing transformer 5, controller side capacitor C7, controller terminal T3, electric lock terminal T4, and electric lock terminal T1 and controller terminal T2 A1 of the two wires connecting the control terminal T3 and the electric lock terminal T4, the other B1 connects the control device terminal T3 and the electric lock terminal T4.
P is formed.

In the electric lock device configured as described above, the high frequency signal f0 generated from the oscillator 11 is input to the input side of the binary counter 12, and the divided high frequency signals f1 and f2 of the square wave are converted into analog signals. The signal is selected by the multiplexer 13 by the synchronization signal f3 and is switched and output. That is, the high-frequency signal f1 or the high-frequency signal f2 is switched every half cycle of the synchronization signal f3, and is output via the analog multiplexer 13 to the input side of the inverter 14a of the transformer drive circuit 6.
Note that the analog multiplexer 13 and the analog multiplexer of the signal selection circuit 10 are synchronized by the synchronization signal f3.

When the frequency output from the binary counter 12 is the high-frequency signal f1, the analog multiplexer 13
Output a high potential from the two inverters 14a,
A high potential is applied to the gate of the FET 15b via the gate 14b, and the source and the drain of the FET 15b are brought into conduction. An inverter 14a is connected to the gate of the FET 15a.
, A low potential is applied, and the source and drain of the FET 15a are turned off. At this time, a current i1 flows through a path from the FET 15b, the controller-side balanced transformer 5, the capacitor C2, and the collector of the NPN transistor Tr1 of the current mirror circuit.

Next, when a low potential is output from the analog multiplexer 13, the two inverters 14a and 14b
, A low potential is applied to the gate of the FET 15b,
The source-drain of the ET 15b becomes non-conductive,
A high potential is applied to the gate of the FET 15a via the inverter 14a, and the source and the drain of the FET 15a are brought into a conductive state. At this time, capacitor C1 → controller-side balanced transformer 5 → FET15a → N of the current mirror circuit
A current i2 flows through the path of the collector of the PN transistor Tr1.

The values of the currents i1 and i2 are determined by the impedance of the controller-side balanced transformer 5, and this impedance is determined by the terminating impedance. That is, the controller-side balanced transformer 5 is terminated via the electric lock-side balanced transformer 20 with the series resonance circuit 21a and the electric lock detection switch 3a or the series resonance circuit 21b and the door detection switch 3b. The value of the current i1 or i2 is determined by the impedance of the electric lock detection switch 3a or the series resonance circuit 21b and the door detection switch 3b.

Assuming that the series resonance circuit 21a is set to resonate in series with the high-frequency signal f1, and the series resonance circuit 21b is set to resonate in series with the frequency signal f2, the electric lock detection switch 3a is closed. In other words, the controller-side balanced transformer 5 is terminated with a low impedance with respect to the high-frequency signal f1, and the controller-side balanced transformer 5 has a low impedance and becomes a current i2.

On the other hand, if the electric lock detection switch 3a is open, the high-frequency signal f1 causes the control-side balanced transformer 5 to be terminated with a high impedance, and the control-side balanced transformer 5 to have a high impedance. The current becomes i1. That is, when the controller side balanced transformer 5 is driven by the high frequency signal f1, the current becomes i1 when the electric lock detection switch 3a is opened, and becomes the current i2 when the electric lock detection switch 3a is closed, The open / close state of the electric lock detection switch 3a appears as a change in the values of the currents i1 and i2.

The open / closed state of the door detection switch 3b does not affect the high frequency signal f1 because the resonance frequency of the series resonance circuit 21b is different from that of the series resonance circuit 21a. Similarly, the opening and closing of the door detection switch 3b appears as a change in the impedance of the controller-side balancing transformer 5 due to the high-frequency signal f2. That is, the high-frequency signal f2
When the controller-side balancing transformer 5 is being driven, the current i1 is obtained when the door detection switch 3b is opened,
When the door detection switch 3b is closed, the current becomes i2, and depending on the open / close state of the door detection switch 3b, the current i1, i2
Will appear as a change in the value of. The series resonance circuit 21a always has a high impedance with respect to the high-frequency signal f2, and does not affect the change in the impedance of the controller-side balanced transformer 5 due to the high-frequency signal f2.

The current i1 and the current i2 flow through the collector of the NPN transistor Tr1.
The transistors Tr1 and Tr2 have a current mirror configuration, and the current-voltage conversion is performed by the current-voltage conversion circuit 7 by the resistor R1 forming the constant current circuit. The current-voltage converted signal is subjected to envelope detection by an envelope detection circuit 8 and input to an input side of an A / D conversion circuit 9.
The analog-to-digital conversion is performed by the A / D conversion circuit 9 and input to the signal selection circuit 10.

The output of the A / D conversion circuit 9 is the signal selection circuit 1
0, the signal output path is selected by the synchronizing signal f3 in synchronization with the analog multiplexer 13, and the lock signal f42 corresponding to the current i2 of the electric lock detection switch 3a is output from the signal selection circuit 10; i
An unlocking signal f41 corresponding to 1 is output to the CPU as a closing signal f52 corresponding to the current i2 of the door detection switch 3b and an opening signal f51 corresponding to the current i1.

The DC power supply + B is turned on / off by relays 17a and 17b driven by an energization control drive signal f6 from the CPU or an energization direction switching control drive signal f7, respectively.
It is inverted and supplied to the actuator 2 depending on the non-conduction state. When the energization control drive signal f6 is output from the CPU, the relay 17a corresponding to the energization control is turned on, the relay 17b is kept in a non-conductive state, and the contact 18a is normally closed → the contact 19a is normally closed. A counterclockwise path to the closed loop LP in the order of contact → balanced transformer 5 on the controller side → balanced transformer 20 on the electric lock side → actuator 2 → normally opened contact of contact 19b → normally closed contact of contact 18b → reference potential point. Is supplied to the actuator 2. When the energization control drive signal f6 and the energization direction switching control drive signal f7 are output from the CPU, the relays 17a and 17b conduct, and the contact 1
8b closed normally open contact → contact 19b closed normally open contact → actuator 2 → electric lock side balance transformer 20
→ the controller-side balanced transformer 5 → the normally open contact with the contact 19a closed → the normally opened contact with the contact 18a → the reference potential point in the order of the closed loop LP in the clockwise direction in the order of the actuator 2 Supplied to In this manner, by supplying the power + B to the actuator 2 in the reverse direction, the cylinder of the electric lock can be moved to lock and unlock the electric lock. At this time, the electric lock detection switch 3a and the door detection switch 3b are also switched by locking and unlocking of the electric lock.

Here, the capacitors C6 and C7 are connected to a high frequency signal.
If the impedance is set to be sufficiently low with respect to f1 and f2, the influence of the actuator connected in parallel can be ignored. Locking an electric lock in such an electric lock device,
A method of determining the unlock direction and determining the lock type will be described with reference to FIG.

When the power supply control drive signal f6 and the power supply direction switching control drive signal f7 are output from the CPU to the power supply unit 1, the direction of the current supplied from the power supply + B to the actuator 2 is set to the direction A, and the power supply control drive signal The direction of the current supplied to the actuator 2 when only f6 is output will be described as the B direction. When the electric lock is installed and the type of the electric lock is first determined, an electric lock drive request signal provided to a living room or the like is operated to input an electric lock drive request signal to the CPU (20).
1) and after determining whether or not the lock type is set in the storage device (202), the signal input from the signal selection circuit 10 to the CPU by the lock type determining means is a lock signal f42 or an unlock signal f41.
Is determined (206). If the lock signal is f42, an energization control drive signal f6 and an energization direction switching control drive signal f7 are output to supply a current in the A direction to the actuator 2 (20).
7). At this time, if the signal input from the signal selection circuit 10 to the CPU becomes the unlock signal f41 by driving the actuator 2 (208), the CPU stops the output of the energization control drive signal f6 and supplies power. The power supply from the unit 1 is stopped (209). At this time, when the actuator 2 is driven and the signal input to the CPU from the signal selection circuit 10 becomes the locking signal f42 (210), the electric lock is determined to be the energized unlocking type (211), and the unlocking direction is determined. Is determined to be the case where the current is supplied to the actuator 2 in the direction A (2
12) and store it in RAM (213). Also, when the actuator 2 is not driven and the signal input from the signal selection circuit 10 to the CPU remains unchanged as the unlock signal f41 (21)
0), the electric lock is determined to be an instantaneously energized unlocking type (214),
The unlocking direction is determined to be the case where the current is supplied to the actuator 2 in the A direction (215), and is stored in the RAM (21).
6).

On the other hand, the signal input from the signal selection circuit 10 to the CPU is the lock signal f42 (206), and a current is supplied to the actuator 2 in the A direction (207), and
The signal input to the U from the signal selection circuit 10 is a lock signal f4.
When it remains at 2 (208), the drive direction switching control drive signal f
The output of 7 is stopped, and a current is supplied to the actuator 2 in the B direction (217). At this time, when the signal input from the signal selection circuit 10 to the CPU as the actuator 2 is driven becomes the unlocking signal f42 (218), the CPU stops the output of the energization control drive signal f6 and the power supply unit 1 The power supply from is stopped (219). At that time, actuator 2
Is driven and the signal input from the signal selection circuit 10 to the CPU becomes the locking signal f42, the electric lock is determined to be of the unlocked type when energized (221), and the unlocking direction is
It is determined that the current is supplied in the direction (222), and R
It is stored in the AM (223). When the actuator 2 is not driven and the signal input from the signal selection circuit 10 to the CPU remains the unlocking signal f41 (220), the electric lock is determined to be the instantaneous energizing and unlocking type (224), and the unlocking direction is determined. Is determined to be the case where the current is supplied to the actuator 2 in the B direction (225), and is stored in the RAM (226).

After the lock type is stored in the storage device in this way, when the electric lock drive request signal is input to the CPU, the lock type stored in the storage device is inquired (203), and C
Based on the signal input from the signal selection circuit 10 to the PU, it is determined whether the power is to be supplied in the A direction or the B direction, and the energization control drive signal f6 and the energization direction switching control signal f7 are output as appropriate, via the actuator 2. To operate the electric lock.

By this operation, even if the current-carrying type is a locking type, locking and unlocking are performed depending on the direction of the current supplied to the actuator 2.
The locking and unlocking directions can be reliably determined even for the unlocked one, and the electric lock can be driven. In the above description, the lock signal f42 (206) is described as the signal input to the CPU from the signal selection circuit 10 in discriminating the lock type. However, in the case of the unlock signal f41, the standby may be performed. The determination may be performed in the same manner.

As described above, power can be supplied to the actuator 2 only for a certain period of time, and the signal from the electric lock detection switch 3a can be transmitted and received.
Transmission and reception of signals can be appropriately performed even with a line. In the above description, the electric lock is explained. However, the door is also opened and closed by the closing signal f52 and the opening signal f51 formed by the detection of the door detection switch 3b based on the high frequency signal f2 generated from the signal generation circuit 4. Can be determined.

In the above example, a relay is used for the power supply unit. However, it has been described that the present invention can be realized by a transistor or an FET and is applied to two types of detection switches. Since long-distance wiring is possible without being affected by the impedance of the capacitance and the line resistance between the lines, the line is balanced and resistant to noise, so that even two lines can transmit and receive appropriate signals. And so on.

[0033]

As is apparent from the above description, according to the determination method of the present invention, the power supply from the power supply unit to the actuator is limited to a fixed time, and then the power supply is stopped to output a signal from the detection switch. Since the input is made, the locked / unlocked state of the electric lock and the lock type can be appropriately determined even with two lines, and complicated setting of the dip switch when the electric lock is set can be eliminated. .

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an electric lock device to which a method for determining an application / unlock direction / lock type of an electric lock according to the present invention is applied.

FIG. 2 is a flowchart of a method for determining the application / unlock direction / lock type of an electric lock according to the present invention.

[Explanation of symbols]

 AQ1 ... Controller BQ1 ... Electric lock 2 ... Actuator 3a ... Detection switch f42 ... Locking signal f41 ... -Unlock signal A1, B1 ... 2 wires

Claims (1)

[Claims] An actuator for operating a cylinder for locking and unlocking a door, a detection switch for generating a locking signal (f42) and an unlocking signal (f41) in conjunction with locking and unlocking of the cylinder. In determining the application, release direction and lock type of the electric lock (BQ1) of the energizing / unlocking type or the instantaneous energizing / unlocking type having (3a) by two lines (A1, B1), The actuator of the electric lock is energized, the locking signal and the unlocking signal are used to determine the application and unlocking directions, the energization is stopped, and the presence or absence of the locking signal obtained via the two wires A method for determining the application / unlocking direction / lock type of an electric lock, wherein the lock type is determined by the following.