JPH0245425B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an electric lock control system that controls unlocking, locking, etc. of an electric lock. In this type of electric lock control system, when a PIN number is entered from the numeric keypad input section of a slave device installed at the entrance, the PIN data is sent to the master device installed indoors, and if it matches, the power is turned off. Control data for controlling the lock is transmitted from the master device to the slave device, and the slave device identifies this data and unlocks or locks the electric lock. However, the conventional system is JP-A-54-75550
As seen in the publication, since data was transmitted bidirectionally between the child device and the parent device, each required a transmitting circuit, a receiving circuit, and a data decoding circuit, resulting in a complicated circuit configuration. As a result, there was a problem in that the cost also increased. The present invention has been made in view of these problems, and its purpose is to make the signal transmission by superimposition between the child device and the parent device unidirectional from the child device to the parent device. As a result, the number of transmitting and receiving circuits can be reduced and signal processing can be simplified, and the number of signal lines between the master unit and slave unit is only two, reducing wiring man-hours and preventing incorrect wiring. Located in providing lock control system. The present invention will be explained below with reference to Examples. FIG. 1 is a schematic circuit block diagram of one embodiment. A is a parent device, and this parent device A receives the power supply voltage V ₀ from the DC power supply section 1 through the low-pass filter 2 and the two-wire signal line 3.
At the same time, the receiving unit 4 receives a transmission signal consisting of a pulsating signal superimposed on the signal line 3 and transmitted from the slave unit B, and controls the control circuit 5 based on this received data. A command signal is sent by operating the electric lock driving power supply section 6 below and raising (or lowering) the power supply voltage _V0 to a predetermined level. The slave device B receives data such as a code number from the numeric keypad input section 7, or detects the detection section 9 such as an open door detection switch, a final lock detection switch, or an unlock detection switch for the electric lock 8.
When the detection data is input, a transmission signal consisting of a pulsating signal is created under the control of the control circuit 10 based on this input data, the transmitter 11 is activated, and the transmission signal is transmitted from the main unit A via the signal line 3. A transmission signal is superimposed on the supplied DC power supply voltage V ₀ and sent to the parent unit A,
Further, when the command detection unit 12 detects that the power supply voltage V ₀ supplied via the signal line 3 has increased due to the action of the electric lock driving power supply unit 6 of the master unit A, the electric lock 8 is operated and unlocked. It is designed to be locked (or locked). Reference numeral 13 denotes a constant voltage power supply unit that converts the power supply voltage V ₀ supplied from the parent device A through the signal line 3 into a constant voltage and uses it as a power source for the control circuit 10 . FIGS. 2a and 2b show specific circuit configurations of the main parts of slave device B and parent device A, respectively. Control circuit 1 of slave unit B
0 is composed of a 1-chip microcomputer, which creates a data signal consisting of a serial pulse train based on input data from the numeric keypad input section 7 or the detection section 9 based on a pre-programmed data processing program, and sends it to the output terminal. D, and this output pulse causes the transistor of the transmitter 11 to
The Tr ₁ is turned on and off to control the oscillation of the transmitter 11 consisting of L and C resonant circuits. The transmitter 11

It oscillates a signal with a carrier frequency of [Formula], and the transistor Tr ₁
When the is off, the carrier frequency signal is superimposed on the power supply voltage _V0 supplied by the signal line 3 as shown in Fig. 3 to form a pulsating signal, and the transmission signal consisting of this pulsating signal is sent to the main unit A side. It's starting to send.
On the other hand, the command detection unit 12 is composed of a switching circuit that causes a base current to flow through the base of the transistor Tr ₂ when the power supply voltage V ₀ exceeds the Zener voltage of the Zener diode D _Z. The supply voltage V ₀ to be
If the voltage is 12V DC and the rising voltage V _{' 0} during operation of the electric lock drive power supply unit 6 is 24V _DC , the Zener diode _D is used to turn off the transistor Tr ₂ during normal times, turn on the transistor Tr ₂ when the voltage rises, and trigger the switching circuit in the electric lock 8 when it is turned on to make it conductive and operate the electric lock 8. . The constant voltage power supply unit 13 is a regulator IC 14 that can supply a constant voltage to the control circuit 10 even if the supply voltage changes. The electric lock 8 is, for example, the fourth
As shown in the figure, motor M is connected to selector switch SW,
The electric lock 8 is connected to a power supply via a switching circuit consisting of thyristors SCR ₁ and SCR ₂ , and when a trigger signal is applied from the command detection section 12, the changeover switch SW is connected. Thyristor SCR ₁ or SCR ₂ on the side is turned on to conduct the motor M, and when the motor M rotates a certain angle, the changeover switch SW switches to turn off the thyristor SCR ₁ or SCR ₂ that is on and stops the rotation of the motor M. It is designed to unlock (or lock) by rotating through a certain angle, and lock (or unlock) by rotating the next certain angle. The receiving section ₄ of the master device A in FIG. The signal is input as a data signal to a control circuit 5 consisting of a one-chip microprocessor or the like. The control circuit 5 determines the content transmitted from the slave device B from the received signal and performs corresponding control. For example, if the data is a recitation number from the numeric keypad input section 7, that data is registered in advance. A comparison judgment is made with certain data, and if they match, an electric lock drive command signal CS is generated, or if it is detected data from the detection section 9, a corresponding display element (not shown) is activated. The detection status of the detection unit 9 is displayed by turning on the light or turning it off. Electric lock drive power supply section 6
The multi-vibrator is operated to oscillate, transistors Tr ₃ and Tr ₄ are operated alternately, charging and discharging the capacitor C ₁ is repeated, and when the capacitor C ₁ is discharged, the capacitor C ₂ is charged and the capacitor C ₂ is charged.
The charging voltage is twice as high as the power supply voltage V ₀ of the DC power supply unit 1. Therefore, when the electric lock drive command signal CS is generated and the switch SW ₀ is turned on, the voltage applied to the signal line 3 is transferred to the capacitor.
It is possible to increase the voltage of C ₂ , that is, 24V. Now, when a recitation number is entered on the numeric keypad input section 7 of the slave device B, the transmission signal is sent from the transmitting section 11 under the control of the control circuit ₁₀ based on the input data in the slave device B. It is superimposed and transmitted. This transmission signal is received and detected by the receiver 4 of the main device A, and the data content is determined by the control circuit. If the registration number and the data content match, the control circuit 5 generates an electric lock drive command signal CS, and the switch SW ₀ is turned on for a certain period of time. This turns on the electric lock driving power supply unit 6.
At the output of , the voltage applied to the signal line 3 increases from V ₀ to V' ₀ as shown in FIG. This voltage increase is detected by the command detection section 12 of the slave device B, triggers the switching circuit of the electric lock 8, and drives the electric lock 8, for example, to unlock it. When this unlocking is detected by an unlocking detection switch (not shown) provided on the electric lock 8 side, the slave device B inputs the unlocking detection data from the detector 9 to the control circuit 10. Under the control of the transmitter 11, the unlock detection data is transmitted as a transmission signal. This transmitted data is recognized as being received by the master unit A and an unlocking display is performed. Furthermore, as for the electric lock 8, the locking is automatically performed mechanically when the door is closed.
A free-lock type door may be used in which the lock is unlocked by rotating a doorknob from inside the room or by operating an electromagnetic mechanism. FIG. 5 shows an application example of the control system according to the present invention in which two slave units B ₁ and B ₂ are connected to the master unit A via the signal line 3, respectively. Child of this system
_B1 is connected to an unlock button 15 for unlocking in addition to inputting a PIN number from the numeric keypad input section 7, and is also connected to a final tightening detection switch 16 and an electric lock 8. When 15 is turned on, the unlocking data is sent to the main device A side, and the main tightening detection switch 1 is also activated.
When the actuation signal No. 6 is input, the detection data is transmitted to the parent unit A side. A so-called free-lock type electric lock 8' is connected to _the slave unit B ₂ , which is mechanically locked when the door is closed and released using an electromagnetic mechanism. 'Enter the PIN number or unlock button 1
The electric lock 8' can be unlocked by turning on the electric lock 5'. The master device A displays a PIN number setting section 17 for setting the PIN number corresponding to the slave devices B ₁ and B ₂ , the unlocking of the electric locks 8 and 8', and the open status of each door. An operation section 20 provided with a display section 18 and operation buttons 19, 19' for electric locks 8, 8'.
etc. are provided on the panel surface. Moreover, the sub-operator C of the electric lock 8 is connected to this main unit A.
A display section 18' for displaying the status of unlocking the electric locks 8, 8' and opening the door based on data from the electric locks 8, 8', and operation buttons 21, 21' of the electric locks 8, 8'.
The operation data of these operation buttons 21, 21' is sent to the master unit A, and the control circuit 5 built in the master unit A unlocks the electric locks 8, 8' and locks the electric lock 8. I am now able to do it. An electric lock operating unit D, which is provided with operation buttons 22, 22' and a display section similar to the sub-operator C, is also connected to the main unit A. In addition, in this application example, it is also possible to generate an alarm output to generate a warning such as an alarm, and a lighting control output to blink a lighting load, etc. by inputting from the numeric keypad input section of slave units _{B 1} and B 2. It is also set up to have a comprehensive control system function. In Fig. 4, 23 is an electric lock strike, and 24 is a thumb turn. As the pulsating signal transmitted from the child device B to the parent device A, the carrier frequency signal may not be used, and a pulsed signal may of course be used. The present invention includes an electric lock, a numeric keypad input section for inputting a code number, a detection section for detecting unlocking of the electric lock and opening of a door, and a transmission signal consisting of a pulsating signal based on data from the numeric keypad input section and the detection section. A control transmitting means for creating a slave device, a slave device equipped with a command detection unit that detects that the applied voltage of the signal changes to a predetermined voltage and creates a trigger signal for the electric lock, and is connected to the slave device by a two-wire signal line. A DC power supply unit normally supplies and applies power supply voltage to the slave device via the signal line, receives and detects the transmission signal consisting of a pulsating signal, discriminates the received data, and creates a command signal based on the content of the discrimination. It consists of a reception control means and a master unit equipped with an electric lock driving power supply section that changes the voltage applied to the signal line to the predetermined voltage according to a command signal from the reception control means, so that power is supplied from the master unit to the child unit. The power supply line for this purpose can also be used as the signal line that sends data from the child device to the parent device, which not only simplifies the wiring work but also eliminates the occurrence of incorrect wiring. The command to drive the electric lock to the slave unit is simply by changing the voltage applied to the signal line, so there is no need for a transmitting circuit on the master unit to create and send command data to the slave unit, and the received data This eliminates the need for a receiving circuit in the child device to process the determination, resulting in a simple configuration and low cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic circuit block diagram of an embodiment of the present invention, FIG. The figure is a signal waveform diagram for explaining the operation of the same as above, Fig. 4 is a circuit diagram of the electric lock used in the above, and Fig. 5 is a schematic diagram of the entire system applied to the above. , CS is the electric lock drive command signal, 1 is the DC power supply section, 3 is the signal line, 4 is the receiving section, 5 is the control circuit, 6
is the power supply unit for driving the electric lock, 7 is the numeric keypad input unit, and 8 is the power supply unit for driving the electric lock.
1 is an electric lock, 9 is a detection section, 10 is a control circuit, 11 is a transmission section, and 12 is a command detection section.

Claims (1)

[Claims] 1 Electric lock, numeric keypad input section for entering PIN number,
A detection unit that detects when an electric lock is unlocked or a door is opened.
Control transmission means that creates a transmission signal consisting of a pulsating signal based on data from the numeric keypad input section and detection section, and command detection that creates a trigger signal for the electric lock by detecting that the applied voltage of the signal changes to a predetermined voltage. A DC power supply unit that is connected to the slave unit with a two-wire signal line and that normally supplies power voltage to the slave unit via the signal line, and receives a transmission signal consisting of a pulsating signal. A reception control means that detects and discriminates received data and creates a command signal based on the determined content, and an electric lock driving power supply that changes the voltage applied to the signal line to the predetermined voltage according to the command signal of the reception control means. An electric lock control system characterized by comprising a parent device with a main unit provided with a main unit.