JPH0215194Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] This proposal relates to a system that uses power lines to centrally monitor gas leak information in apartment complexes, etc., and in particular relates to a terminal device that is installed in each residence to transmit gas leak detection information. be. [Prior art and its problems] In order to prevent gas-related accidents in residences, especially apartment complexes and condominiums, it is possible to use gas leak alarms. In other words, it is clear that a certain degree of safety can be ensured by installing alarms in each unit of a housing complex and adopting a system that centrally monitors each gas leak alarm. However, in order to adopt this system, a dedicated line cable facility is required to connect each house to the central monitoring room (for example, a manager's room), and it is not easy to adopt it in existing apartment complexes. . On the other hand, the idea of using electric light lines for information transmission has been known for some time, and some have been put to practical use in intercoms. However, power lines have problems such as uneven impedance, high noise, and unstable loads, making them unsuitable as transmission lines and cannot be used as information transmission lines that require high reliability. . In addition, in the case of gas leak alarm monitoring systems that require reliability in information transmission to ensure safety, we will solve problems in realizing power line transportation, and more specifically, It is required that the alarm be installed easily without requiring any special construction work, taking into consideration various points such as space for installing the alarm, effective use of ready-made alarms, and ease of maintenance and inspection. However, although it has been known in the past to use electric light lines for information transmission, the reality is that a concrete system is far from being realized. [Purpose of the invention] The present invention solves the above-mentioned problems and provides a device that can realize a gas leak alarm centralized monitoring system using electric power lines by simply attaching an attachment to a ready-made gas leak alarm. [Structure of the invention] In other words, the present invention uses electric lights to guide the detection signals from gas leak alarms installed in each unit of an apartment complex to a central monitoring room via electric wires, and to monitor the gas leak alarms of each unit individually in the central monitoring room. In a gas leak alarm centralized monitoring system using wires, an interface that identifies and encodes monitoring signals, alarm signals, etc. sent from gas leak alarms installed in each house, and receives call signals from the central monitoring room. a code converter that encodes the transmitted signal, a transmitter that transmits the encoded transmit signal to the power line, and a switch between the receiver and transmitter in response to a call from the central monitoring room. A terminal device consisting of a switching section is housed in a case, a flat surface is provided on a part of the front of the case, and a hook is provided to removably connect the alarm body to the flat surface. This is a detection information transmission device for a gas leak warning centralized monitoring system that uses electric light lines. [Explanation of Examples] Examples of the present invention will be described below with reference to figures. In Figure 1, each unit in a condominium, etc. N ₁ ,
Gas leak alarms 1, 1,... for N ₂ ,...N _o , respectively
A central monitoring panel 2 is installed in the manager's room (central monitoring room) M to monitor the signals emitted from the gas leak alarms 1, 1, . . . in each house. This proposal transmits signals between the gas leak alarm 1 of each house and the central monitoring panel 2 in the manager's room M to each apartment building N ₁ , N ₂ , ...N _o and the manager's room M from the power line. This is done by using a drawn-in electric light line 3. A matching transformer 4 is connected between the monitoring panel 2 and each gas leak alarm 1 and the power line 3, and a transmitting/receiving device 5 with an interface is attached to the output terminal of the monitoring panel 2. A terminal device 6 is attached to the output end. FIG. 2 shows an example of the monitoring panel 2 installed in the manager's room M. Display panel 2a of monitoring panel 2
For each unit N ₁ , N ₂ ,... _No , there is an indicator light C that lights up when a gas leak occurs, an indicator light A that lights up when a gas leak alarm malfunctions, etc., and an indicator light A that lights up when there is a malfunction in the terminal device 6 or a power outage. It is equipped with an indicator light B that lights up when there is an abnormality. Although the system configuration of this monitoring panel is not particularly limited, in the embodiment, a constant scanning method is used, that is, each house is called from the continuous monitoring panel 2 by specifying (N ₁ ,...N _o ) in order, and the system is continuously scanned. A case will be explained in which a method of transmitting and receiving information is used. According to this method, each door's call information is constantly checked against the displayed information, and specific houses where problems are occurring, including gas leaks and terminal abnormalities, are indicated by lighting indicator lights A, B, and C. . Additionally, the information transmission system becomes a closed loop, making it possible to verify whether door-to-door call information has been transmitted correctly. The transmitting/receiving device 5 is a device that encodes the door-to-door call signal from the monitoring panel 2 and transmits it to the terminal device 6, and also receives the encoded signal from the terminal device 6, converts it into a detection signal, and inputs it to the monitoring panel 2. It is. As shown in FIG. 3, the transmitting/receiving device 5 includes an address setting circuit 7 which outputs in parallel each door (N ₁ ,...N _o ) to be called sequentially, and a clock to output each door in parallel from the address setting circuit 7. a code converter 8 that serially outputs (N ₁ ,...N _o ) of It consists of 11. 12, 13,
14, FM modulator, amplifier, filter, 15, 16, 17, 18, 19 of the transmitting section 9, respectively
are a filter, an amplifier, a limiter, an FM demodulator, and a slicer of the receiving section 10, respectively. The switching unit 11 is connected to the transmitting side when each door is called, and is switched from the transmitting side to the receiving side in response to a response from a specific terminal device 6 that receives the call. FIG. 4 is a diagram showing the shape of the case of the terminal device 6 installed in each house. A part of the front surface of the main body case 20 of this terminal device has a flat flat surface 20a,
This flat surface 20a is used as a pedestal for the gas leak alarm 1, and a hook 21 on which the alarm 1 is detachably mounted is provided on a part thereof. The type of this hook 21 is determined depending on the type of alarm, and its structure is not particularly limited. FIG. 5 shows a block diagram of the terminal device 6. The terminal device 6 is basically the same as a transmitting/receiving device installed in the manager's room M. That is, the address setting circuit 22 outputs (N ₁ , . . . N _o ) for each unit in parallel in correspondence with the transmitting/receiving device, and the address setting circuit 22 outputs (N ₁ , . . . for each unit in parallel) using a clock. A code conversion unit 23 that outputs N _o ) serially and responds to calls from the transmitting/receiving device.
, a transmitting section 24, a receiving section 25, a switching section 26 that switches between the receiving side and the transmitting side in response to a call from the transmitting/receiving device; , an interface 27 that converts three signals at the time of a failure into three-value information and outputs the information. 28, 29, 3 in Figure 5
0, 31, 32 are filters, amplifiers, limiters, FM demodulators, slicers of the receiving section 25, 33,
34 and 35 are the FM modulator and amplifier of the transmitter 24;
It's a filter. FIG. 6 shows an example of the circuit of the interface 27, and its operation will be explained below. The monitoring signal indicating normality is a voltage of 6V. During monitoring, transistor TR ₂ is turned on with a voltage of 6V,
Transistor TR ₁ turns off and the NAND gate
Signal L during monitoring is output from _O1 . The alarm signal indicating a gas leak has a voltage of 12V. Transistor TR ₁ with 12V voltage during alarm,
TR ₂ is on, the output of NAND gate O ₁ becomes H,
An alarm signal L is output from NAND gate _O3 . The abnormal signal indicating alarm failure or power outage is 0V. In case of failure or power outage, transistor TR ₁ ,
Both TR ₂ are turned off, and inverter O ₂ outputs signal L at the time of failure or power outage. The operation procedure is summarized in Table 1, assuming that the H output is 1 and the L output is O. Therefore, a signal of [0, 1, 1] is output during monitoring, [1, 0, 1] is output when an alarm occurs, and [1, 1, 0] is output when a failure occurs, and the signal is FM modulated and sent to the central side. be done.

[Effect of idea]

As described above, this proposal not only makes it possible to introduce a gas leak alarm centralized monitoring system into existing apartment complexes, which was previously considered to be extremely troublesome to install, but also makes it extremely easy to install and maintain it. This has the effect of greatly contributing to ensuring the safety of residents of apartment complexes.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of a system to which the present invention is applied, Fig. 2 is a front view of the monitoring panel, Fig. 3 is a block diagram of the transmitting/receiving device, Fig. 4 is a perspective view of the terminal device main body, and Fig. 5 is a schematic diagram showing an example of a system to which the present invention is applied. 6 is a block diagram of the terminal device, FIG. 6 is a circuit diagram showing an example of an interface, and FIG. 7 is a sectional view showing a state in which an alarm is connected to the terminal device. 1... Alarm device, 2... Central monitoring panel, 3... Power line, 5... Transmitting/receiving device, 6... Terminal device, 20...
...Terminal device body, 21...Latching tool, 22...Address setting section, 23...Code conversion section, 24...Transmission section, 25...Reception section, 27...Interface, 36...Gas leak alarm device Main body, N ₁ ,…N _o …
...Each apartment building, M...Manager's room (central monitoring room).

Claims (1)

[Scope of utility model registration request] Detection signals from gas leak alarms installed in each unit of an apartment complex are guided to a central monitoring room via power lines, and gas leak information for each unit is individually monitored within the central monitoring room.Intensive monitoring of gas leak alarms using power lines. The system consists of an interface that identifies and encodes monitoring signals, alarm signals, etc. sent from gas leak alarms installed in each house, a receiver that receives call signals from the central monitoring room, and an encoder that encodes transmitted signals. A terminal device consisting of a code conversion section that converts the encoded transmission signal to the power line, a transmission section that transmits the encoded transmission signal to the power line, and a switching section that switches between the reception section and the transmission section in response to a call from the central monitoring room. Put it in the case,
In a gas leak alarm centralized monitoring system using electric light lines, characterized in that a flat flat surface is provided on a part of the front side of the case, and a hook is provided to detachably connect the alarm body to the flat surface. Detection information transmission device.