JPH0775377B2 - Line error detection device for automatic notification device - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention, when a fire, a security sensor such as a gas detector is activated, or an abnormality such as operation of an emergency push button, automatically transmits abnormality information to a prespecified destination such as a central monitoring center or a house of a person concerned through a telephone line. The present invention relates to a line abnormality detection device of an automatic notification device for making a notification.

[Prior art]

Conventionally, as the line abnormality detection device of the automatic notification system,
The automatic notification device installed at the monitoring place periodically sends a notification to the central monitoring center or the house of the person specified as the destination of the notification, and the central monitoring center manages the regular notification time accurately and the regular notification time is reached. Even if the periodical notification cannot be received, it is judged that the line is abnormal.

[Problems to be Solved by the Invention]

However, in such a conventional line error detection device for an automatic notification system, even if a line error occurs, the line error will not be detected until the regular notification time arrives and the center cannot receive the regular notification. , There was a problem that it took too long to detect the line abnormality. In addition, there is a problem that a call charge is incurred every time a regular call is made to monitor a line abnormality, resulting in higher operating costs. The present invention has been made in view of the above conventional problems, and provides a line abnormality detecting device for an automatic notification system capable of quickly detecting a line abnormality and reducing an operating cost by making an actual call unnecessary. With the goal.

[Means for Solving the Problems]

In order to achieve this object, the line abnormality detecting device of the automatic notification device of the present invention is configured as follows. First, the present invention disconnects the telephone line from the telephone line in the event of an abnormality such as a fire, a security sensor such as a gas detector, or the operation of an emergency push button, which is provided between the telephone line and the telephone. Also, the present invention is intended for an automatic reporting device that is connected to a telephone line and automatically reports abnormality information to a previously designated reporting destination such as a central monitoring center or a house of a person concerned through the telephone line. The present invention as a line abnormality detection device for such an automatic notification device, a telephone busy detection unit for detecting that the telephone line is in use, a ringing signal detection unit for detecting a ringing signal of the telephone line, A dial tone detector that detects a dial tone transmitted from the exchange to the telephone line, and a telephone busy signal and a ring signal are detected by the telephone busy detector and the ring signal detector at predetermined time intervals. When the telephone line is not detected, the telephone line is captured next, and when the dial tone is not detected by the dial tone detection unit, a control unit is provided for controlling the line abnormality and notifying the line abnormality. Is characterized by.

[Action]

In the line anomaly detection device of the automatic notification system of the present invention having such a configuration, the automatic notification device detects, during a predetermined time, whether a call is in progress or a call is being made. By capturing the line and not being able to detect the dial tone (400Hz) from the exchange, it is judged as a line error and the line error is reported to monitor the line error in near real time. No call charges are incurred because actual call contact is not required.

【Example】

FIG. 1 is a block diagram of an embodiment showing an embodiment of the automatic notification device used in the automatic notification system of the present invention. In FIG. 1, reference numeral 10 is an automatic notification device installed in a facility or a house to be monitored. The automatic notification device 10 is connected to a telephone line 12 for communication with the outside and an ordinary telephone 14 Are connected. Furthermore, an automatic notification device
A gas detector 16 and a fire detector 18 are connected to 10. Further, the receiver 20 can receive a notification signal from the pendant sensor 22 (a wireless transmitter having an operation button for emergency notification). The pendant sensor 22
For example, it is hung on the neck of a person having a physical disability such as bedridden, and an emergency notification signal can be transmitted to the receiver 20 by a switch operation when an abnormality occurs. Next, the configuration of the automatic notification device 10 will be described. First, the telephone line 12 is pulled into the automatic notification device 10. The light emitting diode of the photocoupler 24 is inserted and connected to one side of the telephone line 12, and the photocoupler is arranged in the opposite direction to the photocoupler 24. 26 light emitting diodes are connected in parallel. Further, the telephone line 12 drawn into the automatic notification device 10 is connected to the telephone 14 via the relay contacts b1 and b2, and the telephone line 12 is connected to the telephone 14 by switching the relay contacts b1 and b2.
It is possible to connect to or disconnect from. Further, relay contacts c1 and c2 are inserted and connected to the telephone line 12 drawn into the automatic notification device 10, and the relay contacts c1 and c2 connect the primary winding of the transformer circuit 28 to the switching contact. Insert the primary winding of the transformer circuit 28 into the telephone line 12 by interlocking the relay contacts c1 and c2 that are in line disconnection with the other side, and talk with the telephone line 12 through the transformer circuit 28. It is possible to send and receive signals. Further, a relay contact a for generating a dial pulse by the operation of the relay A is connected between the telephone lines 12 drawn into the automatic notification device 10. The outputs of the phototransistors of the photocouplers 24 and 26 provided in the telephone line 12 are input to the busy / ring signal detection circuit 30. The photocouplers 24 and 26 and the busy / ring signal detection circuit 30 also have a function as a polarity reversal detection circuit of the telephone line 12. For this reason, when the handset of the telephone set 14 is off-hook, the photodiode of the photocoupler 26 is turned on by the direct current flowing through the telephone line 12, and when the other party is off-hook by sending the dial pulse, the polarity is reversed and the photocoupler 24 It will switch to the light emission of the photodiode. Therefore, the busy / ringing signal detection circuit 30 can detect that the telephone line 12 is in use if a constant light receiving signal is obtained from the photocoupler 24 or 26. on the other hand,
When calling to the telephone 14 through the telephone line 12, a 16 Hz / 75 V calling signal for ringing the bell of the telephone 14 is obtained, and the calling signal causes the photocoupler 24 or
26 photodiodes will start blinking. Therefore,
The busy / ring signal detection circuit 30 can detect the ring signal of the telephone line 12 when a blinking light receiving signal is obtained from the photocoupler 24 or 26. The detection signal of the busy / ring signal detection circuit 30 is given to the control circuit 32 using a CPU. For the control circuit 32, an input circuit 25, a display circuit 34, an operation circuit 36 equipped with an emergency push button, a setting ten-key switch 38 for setting a telephone number to be notified, a memory circuit 40, and relays A, B, C And the dial tone detection circuit 42 is connected. The output of the secondary winding of the transformer circuit 28 is input to the dial tone detection circuit 42, and 400 Hz is sent from the exchange of the telephone line 12.
The dial tone of is detected. Dial tone detection circuit
The operation of 42 controls the relays B and C by the control of the control circuit 32, disconnects the telephone 14 from the telephone line 12 by switching the relay contacts b1 and b2, and switches the transformer circuit 28 by switching the relay contacts c1 and c2.
Is connected to the telephone line 12. The detection of the dial tone by the dial tone detection circuit 42 is performed when neither the busy signal nor the ring signal detection signal is obtained from the busy / ring signal detection circuit 30 in the line abnormality detection processing of the control circuit 32. You will be told. A dialer circuit 44 is provided for the control circuit 32 so that dial pulses can be sent to the telephone line 12 by opening and closing the relay contact a by the relay A. Further, the dialer circuit 44 is a voice amplifier for the PB signal which is a multi-frequency signal.
46, the transformer circuit 28, and relay contacts c1 and c2 so that they can be sent to the telephone line 12. Further, the control circuit 32 is provided with a voice synthesizing circuit 48 for notifying a sensor side or the like of a predetermined voice message by an automatic dial when an abnormality such as a fire or a gas leak occurs. The voice synthesizing circuit 48 receives a command from the control circuit 32, reads a predetermined voice message stored in the memory circuit 50 and converts it into an analog voice signal, and the band pass filter 52, the voice amplifier 46, the transformer circuit 28, A voice message signal can be sent to the telephone line 12 via the relay contacts c1 and c2. Furthermore, a speaker 56 is provided in the automatic notification device 10, and when a line abnormality of the telephone line 12 is detected by the line monitoring processing by the control circuit 32, it is obtained by an alarm output instruction to the voice synthesis circuit 48. The audible alarm signal is given to the speaker 56 by the amplifier 54, and an audible alarm indicating a line abnormality is issued. The control circuit 32 stores a control program for the abnormality occurrence processing shown in the operation flow of FIG. 2 and a control program for the line monitoring processing shown in the operation flow chart of FIG. First, the abnormality occurrence processing will be described with reference to the operation flow chart of FIG. Now, for example, the fire detection signal from the fire detector 18 is input to the input circuit 25.
Is given to the control circuit 32 via
Starts the abnormality occurrence processing shown in FIG. In this abnormality occurrence process, first, step S1 (hereinafter,
The telephone line is captured in "step" is omitted). That is, the relay B operates to switch the relay contacts b1 and b2 to disconnect the telephone set 14 from the telephone line 12. At the same time, the relay C operates to switch the relay contacts c1 and c2 to switch the primary winding of the transformer circuit 28 to the telephone line 12. Connect to. This allows the phone 14
You get the same result as if you took your handset off-hook. Then, in S2, 400Hz from the exchange side for telephone line capture
The presence or absence of a dial tone is checked based on the detection output of the dial tone detection circuit 42, and if the dial tone is normally obtained, the process proceeds to S3.
If no dial tone is obtained in S2, it is judged that there is a call, ringing or line abnormality, and the telephone line is opened in S8.
That is, the relays B and C are restored, and the line acquisition of S1 is repeated. When the dial tone is obtained and the process proceeds to S3, the dialer circuit 44 is actuated to output the PB signal composed of the combination of the multi-frequency signals to the telephone line 12 through the voice amplifier 46, the transformer circuit 28 and the relay contacts c1 and c2. . Then, in S4, it is checked whether the called party is off-hook or not. If there is no reversal, the process proceeds to S9, and if the fixed time has not elapsed, the process returns to S4 again to check the presence or absence of reversal, and this reversal check is repeated for a fixed time. If the reversal is not obtained after a certain period of time, proceed from S9 to S8 to open the telephone line. When it is determined in S4 that the callee is off-hook, the process proceeds to S5, the voice synthesizing circuit 48 is operated, and, for example, a voice message indicating that a fire has occurred is read from the memory circuit 50 and sent as abnormality information. Next, in S6, the presence or absence of reversal due to on-hook of the callee is checked, and until the reversal is determined in S6
Repeat sending of S5 error information. When the reversal of polarity is determined in S6, the telephone rotation 12 is opened due to the restoration of the relays B and C in S7. Next, the line monitoring process will be described with reference to the operation flow chart of FIG. First, the control circuit 32 checks whether or not the telephone is in use in S1. That is, while the telephone is in use, the photodiode of the photocoupler 24 or 26 provided in the telephone line 12 is constantly in a light emitting state, and the busy / ringing signal detection circuit 30 is in use based on the light reception output by the constant light emission. Is detected, and if this in-use detection signal is obtained, the telephone line
12 terminates a series of line monitoring processing assuming that the line is normal. If the result of the determination that the telephone is being used is not obtained in S1, S2
Proceed to and check if there is a ringing signal. When there is a ringing signal from the other party, the photodiode of the photocoupler 24 or 26 provided in the telephone line 12 is blinking, and the busy / ringing signal is based on the blinking light receiving signal from the photocoupler 24 or 26. The detection circuit 30 produces a ringing signal detection output, whereby the control circuit 32 can determine that there is a ringing signal, and if there is a ringing signal, the telephone line 12 is normal and the series of processing is terminated. If the calling signal is not obtained in S2, the process proceeds to S3 and the telephone line is captured. That is, the relays B and C are operated to disconnect the telephone set 14 by switching the relay contacts b1 and b2, and at the same time, the primary winding of the transformer circuit 28 is connected to the telephone line 12 by switching the relay contacts c1 and c2. Next, in S4, the presence or absence of a dial tone is determined. That is, by connecting the primary winding of the transformer circuit 28 to the telephone line 12 by switching the relay contacts c1 and c2, the telephone
Since it becomes the same state as the off-hook of 14, and the dial tone of 400Hz is received from the exchange, this dial tone is detected by the dial tone detection circuit 42, and if the dial tone is normally obtained, the telephone line 12
Terminates a series of line monitoring processing assuming that the line is normal. If the dial tone is not obtained in S4, the process proceeds to S5, and it is checked whether or not the line monitoring process is performed plural times, for example, three times.
If it is less than three times, the process proceeds to S6, the telephone line 12 is opened by the restoration of the relays B and C, the process returns to S1 again, and the same line monitoring process is repeated. By repeating this line monitoring process from S1 to S4, S5
When the third line monitoring process is determined in step S7, the process proceeds to step S7, where the control circuit 32 commands the voice synthesis circuit 48 to output an audible alarm signal, and the audible alarm signal from the amplifier 54 drives the speaker 56 to generate an audible alarm. A ringing operation is performed to notify that there is a line abnormality in the telephone line 12. It should be noted that the line monitoring process of FIG. 3 can be carried out at a sufficiently short time interval as compared with the conventional regular notification to monitor the line abnormality of the telephone line 12 in substantially real time. Further, the line abnormality detecting device of the present invention may be used in combination with the conventional line abnormality monitoring by periodical notification that performs regular notification once a day.

【The invention's effect】

As described above, according to the present invention, the telephone line in use is detected and the ringing signal is detected every predetermined time, and when neither is detected, the telephone line is captured and the dial tone from the exchange is set. Is detected, and if no dial tone is detected, it is judged as a line abnormality and the line abnormality is notified, so it is possible to detect an abnormality in the telephone line without actually using the telephone line. Since it is not subject to operational restrictions like the regular notification of, the line abnormality can be monitored in almost real time. In addition, since it is possible to detect an abnormality in the line without actually using the telephone line as in the case of the conventional regular call, a call charge is not incurred and the operation cost can be greatly reduced. Further, it is possible to detect the abnormality of the telephone line without affecting the telephone call by the telephone.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention; FIG. 2 is an operation flow diagram showing an abnormality occurrence process of the present invention; and FIG. 3 is an operation flow diagram showing a line monitoring process of the present invention. In the figure, 10: Automatic reporting device 12: Telephone line 14: Telephone 16: Gas detector 18: Fire detector 20: Receiver 22: Pendant sensor 24, 26: Photocoupler 25: Input circuit 28: Transformer circuit 30: Use Middle / ring signal detection circuit (polarity inversion detection circuit) 32: Control circuit (CPU) 34: Display circuit 36: Operation circuit 38: Numeric keypad switch 40,50: Memory circuit 42: Dial tone detection circuit 44: Dialer circuit 46 : Voice amplifier 48: Voice synthesizer 52: Bandpass filter 54: Amplifier 56: Speaker

Claims (1)

[Claims] 1. The telephone is disconnected from the telephone line when there is an abnormality such as a fire or a connected security sensor such as a gas detector or an operation of an emergency push button provided between the telephone line and the telephone. An automatic notification device that is connected to a telephone line with the above and automatically reports abnormality information to a prespecified destination such as a central monitoring center or the house of a person concerned through the telephone line, wherein the telephone line is in use. A telephone busy detection unit that detects a ringing signal, a ringing signal detection unit that detects a ringing signal of the telephone line, a dial tone detection unit that detects a dial tone transmitted from an exchange to the telephone line, and at predetermined time intervals. If the telephone busy signal and the ring signal detecting portion detect the telephone busy signal and the ring signal, and if neither is detected, then the telephone line is captured and the dial tone cannot be detected by the dial tone detecting portion. A line abnormality detection device for an automatic notification device, comprising: a control unit that determines that a line abnormality occurs and notifies the line abnormality.