JPS5831146B2 - Emergency notification method - Google Patents

Description

[Detailed Description of the Invention] The present invention is an emergency notification system in which when an abnormal condition occurs, an automatic dialing circuit is activated, a specific location is called via a telephone line, and the abnormal condition is reported by telephone. It is related to.

For example, when an abnormal situation occurs such as an elevator car stopping halfway up a floor in a building, there is a known system that allows a phone call to be made directly to the elevator management company from inside the car. In this case, a terminal device is provided on the elevator side and a center device is provided on the management company side, and the terminal device has at least an alarm push button that can be operated in the elevator car when an abnormality occurs, and a corresponding alarm button. There are provided automatic dialing means that is activated to call the center device when a push button is operated, and communication means (such as a handset and receiver) for communicating between the elevator car and the center device.

Furthermore, the terminal device is released from the call state for a certain period of time,
Timing means are usually provided for returning to the initial state.

This is provided for the purpose of preventing the formation of unnecessary communication channels, since a telephone call is made in an abnormal state and, for example, a normal call termination operation cannot be expected due to a panic state.

However, there are cases where the content of the call is not completed within the above-mentioned certain time period, and in this case, the call path is cut off in the middle of the call, causing an inconvenience.

Therefore, the present invention enables the terminal device to send a warning sound to the center device before the call state is released, and also allows the center device to control the extension of the call state release. be.

Furthermore, the present invention aims to economically configure the device without providing a special circuit for generating the warning sound.

FIG. 1 is a block diagram showing one embodiment of a terminal device in an emergency notification system according to the present invention, and FIG. 2 is a block diagram of the same center device.

Activation switch 1 is a switch for calling the center device when an abnormal condition occurs, contact 2 is a contact of a sensor that is activated when detecting an abnormal condition, 3 is a activation register, 5 is a control circuit, and 6 is a control circuit 5. 7 is a switching circuit that switches the automatic dialing circuit 6 to the office line terminal Lo when the automatic dialing circuit 6 sends out a dial pulse.
The hybrid circuit 8 is usually connected to the central line terminal.

is connected to.

Reference numeral 9 denotes an address memory, which allows addresses to be set and stored in accordance with individual terminal devices.

10 is a signal transmitting/receiving circuit that generates, for example, a two-frequency signal (MF signal) according to the setting state of the address memory 9;
The timing of signal generation is controlled by a control circuit 5, which is a circuit that receives and identifies signals from the center device.

8 is a hybrid circuit, 11 is a communication circuit from an amplifier, audio switch, etc., 12 is a speaker, 13 is a microphone,
These constitute a communication means.

14 is a timer circuit. Reference numeral 4 denotes a call control circuit which provides a signal to the control circuit 5 to control the generation of a warning sound that foretells the release of the call state based on the timed output of the timer circuit 14 or the signal from the signal transmitting/receiving circuit 10.

Regarding the center device shown in FIG. 2, its structure will be explained together with an explanation of its operation.

First, when the sensor contact 2 or the activation switch 1 is closed due to the occurrence of an abnormal condition, the activation register 3 is set and its output signal is given to the control circuit 5, whereby the automatic dialing circuit 6 is activated.

When the automatic dialing circuit 6 is activated, the switching circuit 7 is operated and the automatic dialing circuit 6 is switched to the central office line terminal.

, the automatic dialing operation of the pre-stored telephone number of the center is started, and a dial impulse is sent to call the center.

As a result, in the center device, a ringing signal is applied to the incoming call circuit 22 via the office line terminal L11 first switching circuit 21, so the incoming call circuit 22 responds to this, and the response circuit 23
is activated to put the line into a response state, and also activates the signal sending circuit 24, and transmits the output signal to the second switching circuit 25,
It is sent to the terminal device via the first switching circuit 21.

In the terminal device, this signal is applied to the signal transmitting/receiving circuit 10 via the office line terminal switching circuit 7 and the vibe lift circuit 8.

As a result, the signal transmitting/receiving circuit 10 identifies the above signal,
A signal is sent to the control circuit 5.

As a result, the control circuit 5 operates the address memory 9, sequentially sends preset address number information to the signal transmitting/receiving circuit 10, and controls the signal transmitting/receiving circuit 10 to transmit an MF signal in accordance with the number.

When the signal transmitting/receiving circuit 10 finishes transmitting the signals of all the numbers, it transmits an end signal to the control circuit 5, which causes the control circuit 5 to operate the telephone call circuit 11 and put it in a state where it is possible to make a telephone call. A signal is given to the call control circuit 4 and the timer circuit 14 to operate them.

On the other hand, the center device receives the signal of the address number information with the signal reception identification circuit 26, gives the output to the display circuit 27 to display it, and when the signal of all the numbers is received, the second switching circuit 25 and call circuit 2.
8 to the central office line and ready to talk.

This allows the terminal device to communicate with the center device.

Then, when the talking state has passed for a certain period of time, the timer circuit 1
A first timed output of 4 is sent to output line 14a, which is applied to call control circuit 4.

Accordingly, the call control circuit 4 sends a signal to the control circuit 5 to operate the control circuit 5.

As a result, the address memory 9 is activated again, and the MP signal is sent to the central office line terminal in the same sequence as the sending of the address number information.

sent to. This can be heard by the communication means of the center device as a warning sound for the call state to be released.
If the user wishes to further extend the call time in the center device, the switch 31 is operated.

If the switch 31 is not operated, the second timed output of the timer circuit 14 is sent to the output line 14b after a certain period of time, which resets the start register 3 and returns the control circuit 5 to its initial state. The communication circuit 11 etc. are restored and the communication state is released.

Now, as described above, when the switch 31 is operated in the center device, the call extension control circuit 32 is activated, and the signal transmission circuit 24 is activated to generate a corresponding signal (hereinafter referred to as fa), and the second The switching circuit 25 is operated to send the output signal of the signal sending circuit 24 to the central office line.

The signal fa is applied to the signal transmitting/receiving circuit 10 of the terminal device, identified, and sent to the call control circuit 4.

As a result, the call control circuit 4 interrupts the control signal for sending out the warning sound and resets the timer circuit 14.
Extend the time limit.

Therefore, the restoration of the telephone call circuit 11 is also interrupted, and the telephone call is extended.

Next, the operation of the call control circuit will be explained in detail with reference to the circuit diagram of FIG.

Reference numeral 33 denotes a bandpass filter, which, as described above, has such a characteristic that it passes the signal fa sent from the signal sending circuit 24 when the switch 31 of the center device is operated.

34 is a waveform correction circuit, 35°, 36 is an AND circuit, 37 is an inverter, and 38 is a JK flip-flop.

As mentioned above, after the signal transmitting/receiving circuit 10 has sent out all the signals corresponding to the address number information in the address memory 9, a paper completion signal is sent to the control circuit 5, and the control circuit 5 operates the communication circuit 11. When a call is enabled and a signal is sent to the call control circuit 4, the signal is applied to one input of the AND circuit 36 at a high potential (hereinafter referred to as 11").
), and as a result, the output of the AND circuit 36 becomes ``1'' during that time, and the timer circuit 14 is activated.

Then, as mentioned above, when the talking state has elapsed for a certain period of time, the timer circuit 14 sends the first timed output to the output line 14a, and this is added as a clock signal to the JK flip-flop 38, so that the terminal Q changes from 11" to 10". Since this is applied to the control circuit 5, the control circuit 5 activates the address memory 9 as described above, and a sound announcing the release of the call state is sent to the center device.

On the other hand, as described above, from the control circuit 5 to the AND circuit 36
When the signal 11" is applied to one input of the AND circuit 35, the signal 11" is simultaneously applied to one input of the AND circuit 35, so the center device that hears the warning sound extends the call time as described above. Therefore, when the switch 31 is operated to send out the signal fa, the signal fa is identified by the signal transmitting/receiving circuit 10 and input to the bandpass filter of the call control circuit 4, so that it is passed through the waveform correction circuit 34 and sent to the AND circuit. 35, the output of the AND circuit 35 becomes 11", and the JK flip-flop 38
Apply a signal to terminal R of to reset it, and set terminal Q to 1.
1" to interrupt the signal for sending out the warning sound and set one input of the AND circuit 36 to 0", so the input to the AND circuit 36 becomes 11"% (Q" and the output becomes 1).
0'', thereby resetting the timer circuit 14 and extending the time limit.

As explained above, according to the present invention, a warning sound is sent from the terminal device before the call state is released, and the extension of the call state can be controlled by the operation from the center device that listens to this sound. The line will never be released.

Moreover, since the address information sending circuit is shared without providing a special circuit for generating the warning sound, the apparatus can be constructed economically.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the terminal device in the emergency call system according to the present invention, FIG. 2 is a block diagram of the same center device, and FIG. 3 is an embodiment of the call control circuit in FIG. 1. . 1... Start switch, 2... Sensor contact, 3... Start register, 4... Call control circuit, 5... Control circuit, 6... Deflection dial circuit, 7... Switching circuit, 8...
...Hybrid circuit, 9...Address memory, 10...Signal transmission/reception circuit, 11...
・Telephone circuit, 14...Timer circuit, 22...
... Incoming circuit, 24... Signal sending circuit, 32.
...Call extension control circuit.

Claims (1)

[Claims] 1. Consisting of a terminal device and a center device, when an abnormality occurs, a sensor responds on the terminal device side, or an automatic dialing means is activated and the center device is called by operating a call button. , in an emergency call system that allows calls to be made between a terminal device and a center device,
The terminal device includes an oscillation circuit for transmitting the address information of the terminal device, a timer circuit for releasing the call state for a certain period of time, an oscillation circuit for transmitting a warning sound of release before release, and the above-mentioned timer circuit. A control circuit for controlling a fixed time period of the circuit and a signal receiving circuit for receiving an oscillation signal sent from the center device are provided, and the center device is provided with an oscillation circuit and a switch for controlling the oscillation circuit. The control circuit of the terminal device is driven by sending an oscillation signal output from the oscillation circuit to the terminal device 5, and the timer circuit is controlled to extend the fixed time period. Emergency notification system 2 Claim 1, characterized in that the oscillation circuit for transmitting the address information of the terminal device shares the oscillation circuit for transmitting the warning sound of the release of the call state.
Emergency notification method described in section.