JPS61133499A - Mutual monitor for a plurality of residenses - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mutual monitoring device for a plurality of dwelling units that mutually identifies and displays monitoring information of each dwelling unit among a plurality of grouped dwelling units.

(Prior art) Conventionally, home security systems that detect and notify abnormalities such as fires, gas leaks, and Fllfs in apartment complexes, etc.
A mutual monitoring system is being considered in which multiple residential units are grouped into one group, and monitoring information is mutually identified and displayed within this group, making it possible to quickly respond to abnormal situations such as fires with the cooperation of neighboring residents.

FIG. 6 shows an example of a conventional mutual monitoring device, in which terminal units 2a, 2b, 2c of three residential units, which are grouped together, are connected to a transmission line 1,
As shown in FIG. 2, switches 81, 32 .・・・
・The detection signal of fire, theft, gas leak, etc. indicated by 3n is input to the transmitting element group 3, and the transmitting element group 3 is provided with a tuning fork transmitter or the like that transmits a different frequency signal for each detection target,
A distinguishable frequency signal is sent to the transmission line 1 via the transmission amplifier 4. In addition, the signal from the transmission line 1 is inputted to the reception amplifier 5, and the reception identification element group 6 is equipped with multiple stages of tuning fork oscillators, etc. that identify frequency signals from other dwelling units, and responds based on the reception frequency identification output. Indicator lights Ll, L
2. . . , Ln is turned on so that it is possible to identify and display which dwelling unit and what type of abnormality has occurred.

FIG. 7 shows another example of a conventional mutual monitoring device using a digital transmission method, in which terminal units 2a, 2b, 2
Of G, for example, the terminal unit 2a is set as the master station, and the master station 2a is equipped with a clock pulse generator 7, and the clock pulses of the master station 2a call the terminal units 2b and 2c, which are slave stations, and the master station's Information is transmitted between them in synchronization with clock pulses.

(Problems to be Solved by the Invention) However, in the mutual monitoring device using frequency signals shown in FIG. frequency must be used. For example, if the type of alarm is Class 3IIJ for fire, theft, and gas leak, nine different frequencies must be set, and in order to identify and receive the monitoring status of other dwelling units, six different frequencies must be set, excluding the own assigned frequency. It is necessary to identify the receiving frequency, the number of tuning fork transmitters for transmitting and receiving increases, the device configuration of the terminal unit becomes complicated, and there is a limit to the types of frequencies that can be used, so it is difficult for residential units to mutually monitor each other. number and type of alarm.

The problem was that it was severely restricted.

On the other hand, in the digital transmission method shown in Figure 7, there are fewer restrictions on the number of dwelling units and types of alarms than in the frequency method, but clock pulses are sent out using a specific terminal unit as the master station. Therefore, for example, if the breaker is tripped because the residential unit serving as the master station is away for a trip, etc., the clock pulse from the master station cannot be obtained due to the power cut.
There was a problem in that the mutual monitoring function was lost.

The present invention has been made in view of these conventional problems, and employs a digital transmission method that has no restrictions on the number of dwelling units that perform mutual monitoring and the types of alarms. In addition, the intelligent function of each terminal unit eliminates the need for synchronization between terminals using zero pulses, which is essential for digital transmission, and allows information to be sent and received without causing signal collision between multiple residential units. The purpose is to provide a mutual monitoring device.

In order to achieve this object, the present invention is configured such that each of a plurality of terminal units transmits its own detection information to the transmission line, and when transmitting the detection information, inputs the line signal state and transmits the own transmission line. A collision determination means is provided to determine whether the information matches the information. When this collision determining means determines that the sending information matches the track information, it assumes that no information is being sent from other units and that its own detection information is normally received by the other units. Thereafter, each unit repeats sending out its own detection information every time a certain transmission idle time common to each unit passes. On the other hand, if it is determined that there is a discrepancy between its own transmission information and line information, it is assumed that other units are also sending signals and a signal collision has occurred on the transmission line, and the self detection information and line information are The system repeats sending information after the self-assigned delay time has elapsed until they match, then finds a free transmission time that does not cause a signal collision and shifts to sending information repeatedly every fixed free time. .

(Embodiment) FIG. 2 is an explanatory diagram of the device configuration of the present invention in which four dwelling units are set as one mutual monitoring group, and shows a case where a coaxial line of a CATV system is used as a transmission line.

That is, the transmission line 11 of the CATV system is provided with a tap-off 12 for branching TV signals to subscribers. For example, if a four-branch tap-off 12 is used, four residential units connected to the tap-off 12 are connected to the tap-off 12. are set as one group for mutual monitoring, and the terminal units 10a, 10b, 10c, and 10d are connected to the tap-off 12.

Further, as a transmission signal used for mutual monitoring in the terminal units 10a to 10d, a baseband signal, for example a DC signal, is used for the high frequency signal of the coaxial line 11, and therefore,
The tap-off 12 is provided with bypass means for passing only the baseband signal between each branch terminal.

FIG. 1 is a block diagram showing an embodiment of one of the terminal units 108-10d shown in FIG. 2.

First, to explain the configuration, 13 is a transmission circuit for sending out its own detection information to the coaxial line 11 which serves as a transmission line, and detection data from abnormality sensors such as fire, gas leak, theft, etc. is input. An information code signal consisting of a combination of these sensor data and an address code indicating the own terminal address is output at a predetermined timing that will be explained later. The output of the transmitting circuit 13 is given to the base of the output transistor 15 via the transmitting amplifier 14, and the output transistor 15 is connected to the base of the output transistor 15 according to the code pit of the information code signal.
A pulse voltage corresponding to the information code signal is sent to the transmission line 11 by turning on and off.

On the other hand, the coaxial line 11 is input-connected to the receiving amplifier 16,
The reception output of the reception amplifier 16 is input to a collision determination circuit 17. This collision determination circuit 17 further includes a transmitting circuit 13.
An information code signal corresponding to the self-detected information is also input, and the collision determination circuit 17 receives the self-information code signal from the transmitting circuit 13 and the reception according to the signal state of the coaxial line 11 obtained from the receiving amplifier 16. Compare with the code signal,
It is determined whether the two match or not, and a determination signal is output to the transmission timing control circuit 18.

The transmission timing control circuit 18 controls the transmission timing for instructing the transmission circuit 13 to transmit the information code signal when the power is turned on and in accordance with the output of the collision determination circuit 17. That is, the transmission timing control circuit 18 has the following control functions.

(a') A command to send out its own detection information after a certain delay time that differs for each unit has elapsed after power-on; (b) A fixed transmission common to each unit when its own sending information and line information match. Time TO1 For example, after 4 seconds have elapsed, the detection information is commanded to be transmitted. (C) When the own detection information and the track information do not match, the detection information is commanded to be transmitted after the set delay time has elapsed, and further after the power is turned on in the transmission timing circuit 18. The delay time for initially transmitting information can be selectively set by externally connected address setting switches 81, 82, 83, and 34. For example, different delay times Td 1 for address setting switches 81 to S4
．． Td2. Td 3°Td4. are determined, and the following time relationship is determined between these delay times Td1 to Td4, as an example.

Td1-TI Td 2-2XT1 Td 3-3xTI Td 4-4xT1 For example, if the set delay time due to turning on the address setting switch S1 is Td1-60ms, Td 2=
120 m s, Td3=180 m s.

Td 4='240rn s. Note that the transmission idle time TO is a sufficiently long time with respect to such set delay times Td1 to Td4, and is set to Td=4 seconds, for example.

Therefore, the four terminal units 10a to 1 shown in FIG.
In mutual monitoring based on 0d, for example, by selecting and turning on different address setting switches 81 to S4, a delay time Td is set in the terminal unit 10a.
1 (=60ms), terminal unit 10b1. :
Td 2 (-120ms), terminal unit 10ck:T
d 3 (-180ms >, terminal unit 10d 1
．． :Td4(-24(ls)). Different delay times are set.

Next, in order to identify and display received information from other terminal units, the output of the receiving amplifier 16 is given to a receiving circuit 19, and one receiving circuit identifies the terminal unit and the type of alarm from the received code information, and The display unit 20 displays the dwelling unit where the abnormality has occurred, and the alarm display unit 21 displays the content of the alarm such as fire or gas leak.

Next, the transmission control of the terminal unit shown in FIG.
This will be explained with reference to the flowchart shown in the figure.

When the power of the terminal unit is turned on, the circuit of the unit becomes operational, and first, in block 22, a line check is performed to check the signal state of the transmission line. If a signal is being sent from another unit to the transmission line, data can be obtained by the line check, so it is determined in decision block 23 that a signal is being sent to the transmission line, and block 22 is again executed. Repeat line check. If no data is obtained by the line check in block 22, it is determined that the transmission line is in an empty state, and in block 24, the self-set delay time Td is counted,
After the delay time IJTd has elapsed, the process proceeds to block 2 and data transmission is performed to send the detection information to the transmission line together with the address information. Simultaneously with this data exit, a block 26 detects the signal state of the transmission line, and a determination block 27 determines whether or not the transmitted data matches the line data at that time.

If the two match, it is determined that the data transmission was performed normally, and the transmission is terminated in block 28, and the process proceeds to block 29, where the transmission free time TO, which is commonly determined for each unit, is determined.
is counted, and after the TO time has elapsed, the process returns to block 25 to transmit the next data.

On the other hand, when it is determined in the judgment block 27 that there is a mismatch between the sending data and the line data, the process returns to block 24, where the self-set delay time Td is counted again, and this delay time Td
After the time has elapsed, data is transmitted in block 25, and determination block 27 determines whether the transmitted data matches the line data or not.
That is, it determines whether or not a signal collision has occurred, and repeats data transmission by delay until a data match is obtained. When the data match, the transmission is terminated, and the data transmission control is switched to each time the free transmission time TO elapses. .

FIG. 4 shows a timing chart of transmission control in the mutual monitoring device of the present invention, which was clarified by the 70-chart in FIG. This shows the case where the units 10a to 10d are powered on at the same time.

That is, when the NFAs of the terminal units 10a to 10d are turned on at the same time, as shown in the flowchart of FIG.
In this case, since the power is turned on at the same time, no signal collision occurs on the transmission line, and signal transmission is repeated every time a certain transmission idle time TO has elapsed.

However, it is usually not possible for the terminal units 10a to 10d to be powered on at the same time, and the timing for powering on each unit is determined appropriately.

FIG. 5 is a timing chart illustrating a situation in which a signal collision occurs at the first signal transmission after power-on due to power-on at different timings, taking terminal units 10a and 10b as an example.

That is, if the terminal unit 10b is powered on at time t1, then the set delay time Td starts from time t1.
After 2 elapses, the first signal is sent. On the other hand, the power of the terminal unit 10a is turned on at time t2, and the first signal is sent when the set delay time Td1 elapses from time t2. As a result, as shown by diagonal lines, the transmission timings of the terminal units 10a and 10b overlap, making it impossible to perform normal data transmission.

In such a case, each of the terminal units 108.10b determines whether there is a discrepancy between its own detection information and the line information, and the terminal unit 10a transmits the signal again after a set delay time TdI after determining the discrepancy. On the other hand, the terminal unit 10b will transmit the next signal after the set time Td2 has elapsed since the signal collision. If a signal collision occurs, the timing of the next signal transmission will necessarily be shifted, and thereafter, the signal transmission will be switched to normal signal transmission every time the transmission free time To elapses.

Control when such a signal collision occurs is performed in the same way for all signal collisions among the terminal units 10a to 10d, and each terminal unit performs the next control based on different delay times when a collision is detected. It performs an intelligent function of finding the timing of free transmission time in which normal signal transmission can be performed by transmitting a signal.

Although the above embodiment takes four terminal units as an example, the number of terminal units that perform mutual monitoring can be freely determined. Furthermore, as a transmission line for mutual monitoring, it is of course possible to use an ordinary parallel line in addition to the coaxial line of the CATV system.

(Effects of the Invention) As explained above, according to the present invention, when a signal is transmitted, the signal state of the line is input at the same time, and it is determined whether or not it matches the own transmission information. determines that normal transmission has occurred since no signal collision has occurred, and repeats transmission control to transmit its own detection information after a certain transmission free time common to each unit has elapsed. When it is determined that there is a mismatch between the information and the track information, since a signal collision has occurred, each unit that has determined the signal collision sends out the detected information after a different delay time assigned to itself has elapsed. Since the delayed transmission is repeated until the detected information and the line information match, even if multiple terminal units are randomly powered on and a signal collision occurs on the transmission line, this signal collision will not occur. The transmission timing of the terminal unit that caused the signal collision is controlled to avoid this, and after a certain amount of time has passed since the power was turned on, a normal transmission control state that does not cause signal collision between all terminal units is established. Established by the intelligent functions of each terminal. Therefore, even if the function of the terminal unit stops due to tripping or the like when you go out and trip, it will not affect the transmission control between terminal units that are in other operating states. Even if power is turned on to a terminal unit that has been stopped, even if a signal collision occurs due to the addition of a new signal due to the power being turned on, it will automatically shift to a normal transmission state that does not cause signal collision. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the terminal unit of the present invention, FIG. 2 is a block diagram showing the overall configuration of the present invention, and FIG. 3 is a flow chart showing transmission control of the present invention.
FIG. 4.5 is a timing chart showing transmission timing according to the transmission control of the present invention, and FIGS. 6 and 7 are block diagrams showing conventional examples. 108-10d: Terminal unit 11: Coaxial line 12: Tap-off 13: Transmission circuit 14: Transmission amplifier 15: Output transistor 16: Receiving amplifier 17: ij discrimination circuit 18: One transmission timing control circuit: Receiving circuit 20: Dwelling unit display Instrument 21; Alarm indicator

Claims (1)

[Scope of Claims] A mutual monitoring device for multiple housing units in which terminal units installed in multiple housing units are interconnected via transmission lines, and monitoring information detected by one terminal unit is transmitted to other terminals for identification display. In each terminal unit, a transmitting means for transmitting its own detection information to the transmission line and a signal state of the transmission line at the time of transmitting its own detection information are input, and it is determined that the transmitted information and the line information match. and when the collision determining means determines that the information matches, the transmitting means is commanded to transmit its own detection information after a certain transmission idle time common to each unit has elapsed, and the collision determining means determines whether the information and transmission timing control means for instructing the transmission means to transmit its own detection information at different delay times for each of the terminal units until information coincidence is determined. A mutual monitoring device for multiple residential units.