JPS62257232A - Abnormality supervisory method utilizing lighting line by bidirectional communication - Google Patents

Abstract

PURPOSE:To attain proper and instant bidirectional communication by starting the sending of an invaded abnormal signal of each slave equipment after a specific delay time elapses and making all slave equipments in standby when a slave equipment sending the invaded abnormality at first is started so as to prevent signal collision. CONSTITUTION:A specific delay time is set to the slave equipments 5a-5n, the sending of an invaded abnormal signal to each slave equipment is started after the specific delay time elapses, the standby state of all the other slave equipments is formed by the transmission of the slave equipment detecting at first the invaded abnormality, said standby state is released after the end of reception of the invaded abnormal signal sent at first from the master equipment 4 and the sending of the invaded abnormal signal of the other slave equipment is started. While the invasion abnormal signal is sent from the slave equipment to the master equipment, the polling from the master equipment to the slave equipment is suppressed and the sending of the invaded abnormal signal from the slave equipment to the master equipment is suppressed during said polling. Thus, disadvantages in lack of the instantaneous performance of the calling and in generation of signal interference is solved.

Description

[Detailed Description of the Invention] Industrial field of application: A@L, where a plurality of slave units for intruder detection and a base unit that centrally monitors the slave units via power lines are used. In the event of an abnormality in which an intruder is detected, the handset sends an intrusion abnormality signal to the base unit, and under normal conditions, the base unit sequentially checks each slave unit at regular intervals to determine whether or not the slave unit is in a state where it can detect an intruder. The present invention relates to a method of monitoring a communication line between a base unit and a slave unit by polling.

Problems with the conventional technology There are two conventional methods for this type of alarm monitoring system: a random method and a polling method. In the former random method, a slave unit that detects an intruder unilaterally detects an intruder without being concerned about other slave units. Since the intrusion abnormality signal was sent out between the handsets, collision of the intrusion abnormality signals between slave units occurred, and the unit could not function properly as an alarm monitoring system. In order to avoid this signal collision, the latter polling method polls multiple handsets in sequence, and only when a handset receives this polling can the same handset send an intrusion error signal. However, even if the child device detects an abnormality, the system cannot immediately send the message to the parent device, so it lacks quick response.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional system in an alarm monitoring system using two-way communication using electric power lines, and eliminates signal collisions between slave units and signal collisions between slave units and base units. An object of the present invention is to provide an abnormality monitoring method that prevents the above-mentioned two-way communication from occurring in an appropriate and responsive manner.

Embodiment of the invention Figure 1 shows two-wire bidirectional communication using electric power lines! !
This is a circuit block diagram of the alarm monitoring system, in which 2 is an AC 100V Shokawa electric light line used as a signal transmission path, 1 is a block filter that prevents signals from leaking outside the alarm monitoring system, 4 is an XMJa, 5a, 5b
, 5cm5n (hereinafter referred to as 5) is a slave device with a built-in sensor, and 6 is an additional buzzer unit.
The handset 5 and the additional buzzer unit 6 are connected to the power line 2 through a connection window 3 consisting of, for example, a plug and an outlet. 7 is a telephone line for sending information from the parent 41!4 to the outside, that is, to the monitoring center, and 8 is this telephone line 7.
is a phone connected to the

- When the child I11.5 described in L is installed at an opening in a building, for example, near a window, and the sensor built in this child unit 5 detects an intruder, the child Ia5 sends out an intrusion abnormality signal and connects the power line 2. The signal is sent to the base unit 4 via If necessary, the base unit 4 can report to the monitoring center via the telephone number !17.

Figure 2 is a circuit block diagram of the parent@4. In the figure, the intrusion abnormality signal sent from the handset 5 via the power line 2 is superimposed on AC 50Hz or 60Hz, so the PLC transmission/reception p 4 e Only the signal component is extracted, converted into a pulse signal by the encoder/decoder 4d, and taken into the CPU-A and CPU-B via the input/output interface 4C.

For example, the slave unit 5 and the parent unit 4 of the CPU-A are stored in ROM4 f.
! The ROM 4p stores operating programs for the CPU-H, such as an automatic calling function to the telephone line 7, for example.

The operation part 4a is a membrane switch, and the 0 display part 4a', which is composed of a numeric keypad for a password, an operation mode setting switch, a warning switch for each sensor, etc., identifies the type of alarm and which handset has activated. indicate.

One of the above operations? When the notification mode is set by operating B 14a, or when an intrusion abnormality signal is sent from the handset and reported to the monitoring center via the telephone line 7, an automatic call is made via the input/output interface 4C of the CPU-H. The feature is configured to work. The MF double signal generator 4j is an oscillator 1M for converting the pulse code into a two-frequency signal.
The ODEM section 4 has a signal modulation section 1 line connection section 4m is a telephone line! ! It controls switching between connecting I7 to parent 4114 and telephone 8, and has a contact point for relay 4n. 4b indicates an interface including a display key switch, and 4h indicates a power source.

The operation of reporting to the monitoring center is to switch the telephone line 7 from the telephone 8 to the base unit 4, automatically dial the monitoring center, and then send out the information as an MF signal, and for reception from the monitoring center, send the signal as an answer signal. Receive with the receiver section 4.

FIG. 3 is a circuit block diagram of the handset 5, in which the handset monitoring signal sent from the parent 4!14 via the power line 2 is an AC 5
Since the signal is superimposed on 0 Hz or 60 Hz, only the signal component is extracted by the PLO transmitter/receiver 10, converted into a pulse signal by the encoder/decoder 11, and taken into the CPU via the human output interface 12.

On the other hand, when the built-in sensor 13 in the handset 5 operates, its output signal, an intrusion abnormality signal, is sent to the input/output interface 1.
4, is converted into a pulse signal by the encoder/decoder 11, modulated by the PLO transmitter/receiver 10, superimposed on the AC 50Hz or 60Hx of the power line 2, and sent to the base unit 4. 15 is a ROM in which the operating program of the CPU is stored, and 16 is a power supply.

FIG. 4 is a circuit block diagram of the additional buzzer unit 6, in which the alarm signal from the parent a4 is received by the PLO receiver 20, only the signal component is extracted, the decoder 21 converts it into a pulse signal, and the signal is sent via the output control circuit 22. to sound the buzzer 23 or turn on the lamp 24. Note that 25 indicates a power supply section.

FIG. 5 is a signal waveform diagram showing a transmission procedure during polling from the base unit 4 to constantly monitor the presence or absence of an abnormality in the communication line between the base unit 4 and the slave unit 5. The master device 4 polls the handset 5 sequentially every second, and if there is no abnormality in the communication line such as a failure on the handset side or disconnection of the connector 3, normal data is sequentially sent from the handset. Base unit 4 starts polling with 5 as house code Y1 and address zero.
Polling data Y2 is sent out to the line. All slave units 5 receive these signals, set their own addresses and enter a standby state, and in this state, the base unit 4 transfers to the first slave unit 5. Set the address Y3 (5-bit information in this embodiment) unique to the machine 5a.

This address Y3 and polling data Y4 (4-bit information in this embodiment) are sent to the line.

Since this address Y3 and the address of the first handset 5a match, is it the same? The I-th machine 5a receives the polling data Y4 and sends out its own address Y5 and normal data Y8. These self addresses Y5. Normal data Y6
A few seconds after the transmission of , all slave devices cancel their self-address settings and return to the normal state iEH (state in which intrusion abnormality signal transmission is possible).

30 seconds after this return, the house code Yl is returned from the base unit 4 again.
, address zero, and polling data Y2 are sent to all the slave units, and all the slave units set their own addresses and enter a standby state. Under this state, the base unit 4 transmits the data to the second slave unit 5b. Set address Y7 and use this address data Y
7 and polling data Y8. Since this address data Y7 and the address of the second handset 5b match, it accepts polling data Y8 and sends out its own address Y9 and normal data YIO. These self addresses Y9. A few seconds after sending the normal data Y10, all slave units cancel their self-address settings and return to the normal state. Thereafter, the communication lines with all slave devices are sequentially monitored in the same manner.

Since this embodiment uses a power line as a signal transmission path, there is a possibility that various noises are superimposed on the power line, so it is necessary to improve the reliability of communication between the base unit and slave unit. Therefore, the above-mentioned house code is repeatedly transmitted 18 times, and the address data is repeatedly transmitted 4 times.

In addition, if the handset cannot send normal data due to a malfunction or the power outlet of the handset is disconnected, the handset will be in a state where it cannot make a call only if it cannot receive normal data from the same handset twice in a row. (communication line abnormality) is displayed.
Such information is transmitted to the monitoring center as necessary.

Figure 6 shows the built-in sensor in JA5 detects an intruder and sends out an intrusion abnormality signal! This is a waveform diagram of the intrusion abnormality signal when transmitted to 1J114.If multiple child units detect an intruder at the same time and send out intrusion abnormality signals all at once, a collision of the same signals will occur and the master unit will receive an intrusion abnormality signal. Since the same signal cannot be identified, the handset side has to set the unique delay time tl for each address.
is set, and the intrusion abnormality signal is sent out after this specific delay time tl. Taking the address of a certain handset as an example, the above inherent delay time is 81, 92X (2”+2
'+2')=573.4'4ms.

After the above-described specific delay time, the handset that detected the intruder sends the intrusion abnormality signal and sets the house code Y11 and one address zero Y12. Data zero Y13 is sent to the power line 2, and upon receiving this signal, all handsets set their own addresses and enter a standby state. Under this state, the handsets that detect an intruder continue to set address zero and their own addresses. Address data Y14
It is sent to power line 2 as a power line. At this time, the base unit 4 has a zero address and receives the address of the slave unit that issued the alarm, sets the address, and the slave unit sends out the next alarm data Y15 (
Intrusion abnormality signal) is installed.

Next, the base unit 4 sends the house code YIEI, the address Y17 of the slave unit that issued the alarm, and the acknowledgment data Y18 to the power line 2, while the slave unit that issued the alarm cancels its own address setting upon receiving the acknowledgment data YI8 from the parent unit Ia4. do.

Master unit 4 has acknowledgment data Y18 followed by house code YI9.
Buzzer ON data Y2 for additional buzzer unit 6
0 and lamp ON data Y21 are repeatedly sent out multiple times, and a series of alarm operations between the slave device, the parent device, and the additional buzzer unit is completed. If the sensor of another handset detects an intruder while this series of alarm operations is being performed,
The slave unit enters a latched state and waits for, for example, 5 seconds each time it receives a house code from the parent unit on the power line, and if there is no house code after 5 seconds, the operation described with reference to FIG. 6 is performed.

Furthermore, if the handset that has issued the intrusion abnormality signal is unable to receive acknowledgment data from the master unit due to noise on the power line, etc., the handset is configured to repeatedly send out the intrusion abnormality signal. .

In this way, when a slave unit enters the intrusion abnormality alarm operation, or when the base unit starts polling, the house code is sent out on the line as the first information, so other slave units receive this Alternatively, the base unit enters a standby state to avoid collision when sending signals.

Effects of the Invention According to the present invention, when transmitting the intrusion abnormality signal, in order to avoid collision with intrusion abnormality signals sent from other slave units, the first condition is that each slave unit A unique delay time is set so that each handset starts transmitting an intrusion abnormality signal after the unique delay time has elapsed, and the second condition is that the first handset that detects an intrusion abnormality sends a signal to transmit an intrusion abnormality signal. All slave units are placed in a standby state, and after the parent unit completes receiving the first intrusion error signal, the standby state is canceled and other slave units begin sending out intrusion error signals. Polling from the base unit to the slave unit is suppressed while the unit is sending an intrusion error signal to the base unit, and during polling, the transmission of an intrusion error signal from the slave unit to the base unit is suppressed. ,
It is possible to avoid signal collisions between slave units and base units, and to reliably prevent signal collisions between slave units or signal collisions between slave units and base units, which are the conventional drawbacks. In addition, when the handset detects an intrusion abnormality, it can immediately send an alarm to the base unit, which eliminates the drawbacks of conventional methods, such as the lack of prompt response in the alarm operation when an intrusion abnormality occurs, and signal interference. It is possible to solve the drawbacks such as the occurrence of , and to provide an abnormality monitoring method using highly reliable two-way communication.

[Brief explanation of drawings]

The drawings show an example of an embodiment from January, Fig. 1 is a circuit block diagram of an alarm monitoring system with two-wire bidirectional communication using electric power lines, Fig. 2 is a circuit block diagram of the main unit, and Fig. 3 Figure 4 is a circuit block diagram of the slave unit, Figure 4 is a circuit block diagram of the additional buzzer unit, Figure 5 is a signal waveform diagram showing the polling transmission procedure for monitoring the status of the slave unit from the base unit, and Figure 6 The figure is a waveform diagram of the procedure in which the sensor of the child device detects an intruder and sends an intrusion abnormality signal to the parent device. 2...Light line, 3...Connector, 4...Main unit, 5...
...Slave unit, 6...Additional buzzer unit, 7...Telephone line, 8...Telephone set.

Claims (2)

[Claims] (1) Equipped with multiple handsets for intruder detection and a master unit that centrally monitors the handsets via electric power lines, and when a handset detects an intruder and an abnormality occurs, the handset sends an intrusion abnormality signal. is transmitted to the base unit, and under normal conditions, the base unit polls each slave unit at regular intervals to determine whether the slave unit is in a state where it can detect an intruder, and the communication line between the base unit and slave units is established. In this method, when the above-mentioned intrusion abnormality signal is sent out, in order to avoid collision with intrusion abnormality signals sent from other slave units, the first condition is to set a delay time specific to each slave unit. is set so that each slave unit starts transmitting an intrusion error signal after the specific delay time has elapsed, and the second condition is that when the first slave unit that detects an intrusion error transmits, all other slave units The two-way communication is characterized in that the standby state is formed, and after the master device completes receiving the first intrusion abnormality signal, the standby state is released and the other slave devices start transmitting the intrusion abnormality signal. A method for monitoring abnormalities in the use of power lines. (2) While the handset is sending an intrusion error signal, polling from the base unit is suppressed, and during polling, the slave unit is suppressed from sending an intrusion error signal to prevent signal collision between the handset and the base unit. A method for monitoring abnormalities in the use of electric power lines using bidirectional communication as claimed in claim 1, wherein