JPH0437478B2 - - Google Patents

Abstract

1. An electromechanical driving unit for controlling a device monitoring an access, comprising on the one hand a control unit arranged in the vicinity of the device which is to be controlled and which comprises an electronic device (1-4) which checks the code supplied by the users and if this code is correct supplies a control signal to the electrical unit (5) for actuating the device, and on the other hand a monitoring unit arranged at a distance which allows for the control and/or monitoring of the opening of the door, characterised in that the control unit comprises a voltage detection element (6, 13) which is connected to the terminals of the electrical actuation unit (5) and whose output signal is transmitted to an AND logic circuit (7, 21), which also receives a signal representing the absence of an acutation command, the output signal of the said logic circuit (7, 21) forming an alarm signal which is transmitted to the monitoring unit.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is a device whose operation is performed by a password, and which allows entry only to authorized persons who are familiar with the password, such as an electric latch lock or a door opening motor. The present invention relates to an electronic operating device for controlling a device for managing access to allow access.

BACKGROUND OF THE INVENTION Generally, these electronic operating devices are electronic operating devices that are located near the device to be controlled and that confirm a password given by the user and, in the case of a correct password, issue a control signal for the electrical actuation device of the device. It consists of a control unit with the equipment and a monitoring unit located at a distance and making it possible to control and/or manage said access.

PROBLEM SOLVED BY THE INVENTION One possible means by which an unauthorized person can force entry is to energize an electrically actuated device directly from an external power source. This can be accomplished relatively discreetly, since it is sufficient to open the housing to reach the actuating device. It would therefore be desirable to provide an alarm system that would make it possible to alert the guard station of such attempted unauthorized entry.
This alarm, of course, must not be activated during a cleared approach.

It is an object of the invention to provide an electrically actuated device of the kind described above, which provides an alarm to a monitoring unit in the event of unauthorized energization.

Means for Solving the Problems In the electromechanical operating device of the present invention, the control unit comprises a voltage detection element connected to a terminal of the electrical actuating device, and the output signal thereof is such that a signal indicating the absence of an operating command is applied. The output signal from said logic circuit is characterized in that it becomes an alarm signal which is electrically transmitted to a monitoring unit.

Advantageously, said alarm signal is stored in a memory built into the control unit and reset to zero by the monitoring unit. By this method,
Any attempt to energize the actuator will generate an alarm, which may also be sent to the site of the controlled entry to thwart unauthorized entry attempts. Since this alarm is stored in the memory, it will not be erased even if, for example, a person leaving the room issues a permission activation command by directly controlling the activation without using a password.

Advantageously, the voltage sensing element emits a signal at a constant level, regardless of the applied voltage.
This makes it possible to detect a voltage that is clearly different from the normal voltage of the actuating device. This is important because the person attempting to force the door open does not necessarily know the normal voltage at which the actuator will function.

The detection element is composed of, for example, a photocoupler in which a light emitting element is connected to wiring of an actuator, a light receiving element is supplied with a constant voltage, and serves as an output end of the detector. In this way, the voltage across the actuator and the output signal of the sensor are completely decoupled.

It is advantageous to combine this alarm with an alarm that detects a shock or a torsion on the control unit, in which case the alarm signal and the shock alarm signal are sent to an OR logic circuit, which is passed to the monitoring unit. Issue two general warnings.

Embodiments An example in which the present invention is applied to controlling the unlocking of an electric latch lock will be described below, but the present invention can be applied to any electromechanical operating device, such as a door opening control motor.

FIG. 1 shows an electric latching lock comprising, for example, an input interface 1 comprising, for example, a keystroke, a badge reader, etc., which enables the input of a password for opening the door. The output from this input interface is sent to a comparator 2, which also receives from the memory 3 the electrically recorded door opening code. If the two passwords are coded, the comparator is
A door opening signal stored in a memory 4 is applied to an electric catch 5.

According to the invention, a voltage detector 6 is provided in which the electrical opening device of the catch 5 is connected in parallel with the distribution line. The output signal of this detector 6 is combined with a signal indicating the absence of a door opening command from the memory 4 and the inverter circuit 10 in an AND logic circuit 7, and the logic circuit 7 issues an alarm for direct energization to the electric latch 5. Output a signal.

According to another feature of the invention, the control unit furthermore detects an impact experienced by the control unit or a twisting of the unit and therefore detects an impact experienced by the central unit or that the central unit is twisted. It consists of a detector 8 that emits an alarm signal to notify. The energization alarm signal provided by the AND logic gate 7 and the shock or twist alarm signal provided by the detector 8 are combined in an OR logic circuit 9, which outputs a general alarm signal of an abnormal attempt. .

Preferably, the energization or shock or torsion alarm signals are stored in memory 11 and then sent to a monitoring unit (not shown). This monitoring unit resets the memory 11 to zero via line 12, for example.

FIG. 2 shows an advantageous embodiment of the voltage detection element 6. FIG. An unauthorized person attempting to open the door may not necessarily know the normal voltage of the electric latch and may apply a voltage that is clearly different from this normal voltage. Therefore, it is necessary to eliminate voltage fluctuations at the detection terminal. That is, it is necessary to select a detector whose output signal is independent of the detected voltage. This is possible, for example, by using a photocoupler 13, a component in which the light source 14 and the light receiver 15 are optically coupled. The light emitting portion of the photocoupler 13 is connected to the current-carrying terminal of the electric clasp 5 via a resistor 16 and a protective diode 17. On the other hand, the light receiver is energized with a constant voltage through a resistor 18, and the other terminal is connected to ground. With these methods,
A high level logic signal when the receiver 15 detects the absence of voltage, and a low level logic signal when the element 14 is energized, is applied to the receiver terminal 19 connected to the positive power supply. It can be obtained with At the terminal 19, therefore, a signal can be obtained representing the voltage at the terminal of the electric catch 5, but this signal is reversed since it is at a high level when there is no voltage.

In the embodiment described here, the AND circuit 7 is actually constituted by a NOR circuit 21 which receives the complementary signal of the signal sent to the AND circuit.
That is, the second gate of the NOR circuit 21 receives a signal representing the presence or absence of a command, which is inverted so that it goes high in the absence of the normal door opening signal. According to the present invention, if a voltage is supplied to the electric clasp through a branch, an alarm is immediately issued regardless of the magnitude of this voltage.

The energization of the actuating device is generally supplied from the electrical grid using a buffer storage battery. For example, in the case of controlling the door of a house, the use of a buffer storage battery makes it possible to open the door even during a power outage. However, if the homeowner is absent for a long period of time, there may be a power outage that exceeds the duration of the buffer storage battery, and in that case, the door cannot be opened after such a long power outage. It becomes impossible.

According to the invention, a connection device with an external battery is provided at the control unit, but this connection device becomes effective, that is, the connection with the actuating device is made only during a power outage and when the buffer storage battery is connected. only if it is unavailable. This device allows users to enter their residences even after long power outages when the buffer batteries are no longer available. Advantageously, the buffer accumulator is automatically rendered unusable before it reaches a discharged state that renders it unusable.

The above description is merely a typical usage example, and is not intended to be limiting in any way, and changes and modifications can be made without departing from the scope of the invention. Especially, for example, in Figure 1
Some parts can be replaced by parts that perform the same function, such as using a NOR logic circuit 21 instead of an AND logic circuit.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a control unit for an electric latching lock according to the present invention, and FIG. 2 is an embodiment of a voltage detection element. 1...Input interface, 2...Comparator,
3, 4, 11...Memory, 5...Electric clasp,
6...Voltage detector, 7...AND logic circuit, 8...
...Detector, 9...OR logic circuit, 10...Inverter circuit, 12...Line, 13...Photocoupler, 14...Emitter, 15...Photoreceiver, 16,
18...Resistor, 17...Diode, 21...
NOR circuit.

Claims (1)

[Scope of Claims] 1. Electronic device 1 which is disposed near the access control device to be controlled and which confirms the password given by the user and, if the password is correct, issues an activation signal for the electrical actuation device 5 of the access control device. -4 and a control unit located at a distance that controls the opening and closing of the door and/or
The control unit comprises voltage detection elements 6, 13 which are connected to the terminals of the electrically actuated device and supply output signals to logic circuits 7, 21 which perform an AND function. An electromechanical operating device for controlling an access control device, characterized in that it receives a signal indicating the absence of an activation command and supplies it as an alarm signal to a monitoring unit. 2. Electromechanical operating device according to claim 1, characterized in that the alarm signal is stored in a memory 11 built into the control unit and reset to zero by a monitoring unit. 3. The electromechanical operating device according to claim 1 or 2, wherein the voltage detection elements 6, 13 supply a signal at a constant level independent of the applied voltage. 4. The voltage detection element is characterized in that the light emitting part 14 is connected to the power supply terminal of the electrically actuating device 5 and the light receiving part 15 is composed of a photocoupler 13 which receives a constant voltage current supply. electromechanical operating device. 5. The control unit comprises an OR logic circuit 9 to which the alarm signal and the signal from the shock detector 8 are applied, and the OR logic circuit 9 is characterized in that it issues a general alarm signal of an abnormality to the monitoring unit. , an electromechanical operating device according to any one of claims 1 to 4. 6. Powered by the electricity grid and the buffer storage battery, the control unit consists of a connecting device connecting the external storage battery to the electrical actuating device 5, which connection device is designed to work only when the electricity grid is interrupted and the buffer storage battery is not used. An electromechanical operating device according to any one of claims 1 to 5.