JPH02201595A - Power supply controller for fire prevention equipment - Google Patents

Abstract

PURPOSE:To reduce energy consumption by supplying a reference voltage to a comparator only when abnormality such as fire or the operating state of an equipment to be controlled is detected in the case that the reference voltage is supplied to this comparator to detect the abnormality such as the fire, the level or the signal of the operating state, etc., of the equipment to be controlled. CONSTITUTION:A receiver RE and plural repeaters T1-TN, which are terminals, are connected by a pair of power supply and signal line L and plural fire sensors DE are connected to the repeater T1. Then, the other repeaters T2-TN are same as the repeater T1. Here, when the reference voltage is supplied to a comparator CM to detect the abnormality such as the fire, the level or the signal of the operating state, etc., of the equipment to be controlled such as a fire prevention door and a smoke prevention dumper, etc., the reference voltage is supplied to this comparator CM only in the case that the abnormality such as the fire. etc., or the operating state of the equipment to be controlled is detected. Thus, current consumption is reduced in the reference voltage supply source of the comparator CM and the energy consumption can be decreased in the whole fire prevention equipment.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a power supply control device for disaster prevention equipment.

[Conventional technology] In disaster prevention equipment such as fire alarm equipment, even in a power outage state,
If the function needs to be maintained for several hours, and a fire etc. occurs during the power outage.

The emergency bell must ring for a certain period of time. For this purpose, the receiver has a built-in emergency power source (rechargeable battery).

[Problems to be Solved by the Invention] By the way, terminals such as fire detectors and repeaters have a built-in comparator in order to determine an abnormality such as a fire or an operating state of a controlled device such as a fire door. There is a problem in that the power consumption of this comparator is relatively large. Among these, the current consumption of the reference voltage supply source that supplies the reference voltage necessary for discrimination is large, which increases the power consumption of the entire disaster prevention equipment.

Further, as the length of the power supply/signal line becomes longer, the influence of the above-mentioned power consumption becomes greater.

An object of the present invention is to provide a power supply control device for disaster prevention equipment that can reduce power consumption in a reference voltage supply source that supplies a reference voltage for a comparator.

[Means for Solving the Problems] The present invention provides a method for detecting an abnormality such as a fire or the operating state of a controlled device when supplying a reference voltage to a comparator that detects a level or signal indicating an abnormality such as a fire or the operating state of a controlled device. The reference voltage is supplied to the L comparator only when detecting the operating state.

[Function] The present invention detects an abnormality in fire calculation when supplying a reference voltage to a comparator that detects a level or signal of an abnormality such as a fire or the operating status of controlled equipment such as a fire door or smoke prevention damper. Alternatively, since the reference voltage is supplied to the comparator only when detecting the operating state of the controlled equipment, the current consumption in the reference voltage supply source of the comparator is reduced, reducing the power consumption of the entire disaster prevention equipment. be able to.

[Example] FIG. 1 is a block diagram showing an embodiment of the present invention.

In this embodiment, the receiver RE and a plurality of repeaters T1 to TN, which are terminals, are connected, for example, by a pair of power and signal lines, and a plurality of fire detectors DE are connected to the repeater T1. . Further, although only the repeater T1 is shown in FIG. 1, the other repeaters T2 to TN are also similar to the repeater T1.

The repeater TI includes a microprocessor MPU that controls the entire repeater T1, a ROMI that contains a program related to the flowchart shown in FIG. 3, a RAMI that is used as a work area, and a RAM2 that stores the self address of the repeater T1. , a comparator CM for fire signal discrimination that detects abnormalities such as fire, and a reference voltage supply [TVG] that supplies a reference voltage to the comparator CM; and a power control means PSWI for supplying power to the CM.

The repeater T1 also includes a dip switch DIP that sets the self-address of the repeater T1, and a power supply means PS that supplies power to the dip switch DIP only at the initial time.
W2, a transmitting section TX including a parallel/serial converter and a transmitting circuit, and a receiving section RX including a receiving circuit and a serial/parallel converting circuit.

FIG. 2 is a circuit diagram specifically showing the main parts of the above embodiment.

In this FIG. 2, the signal from the fire detector DE is sent to one input terminal of the comparator CM via the resistor R2, and the reference voltage from the reference voltage supply source TVG is sent to the ten input terminals of the comparator CM. Supplied.

The reference voltage supply source TVG generates a reference voltage by dividing the power supply voltage using resistors R3 and R4, and a transistor TR is connected between the power supply and the reference voltage supply source TVG. Further, the power supply control means PSWI is composed of the transistor TR and an inverter I that inverts the signal from IF2.

In addition, IF2 is used only when detecting an abnormality such as a fire.
It generates a high output, and when IF2 is high
When an output of gh is generated, inverter (2) outputs a Low signal and transistor TR2 is turned on.

Note that the reference voltage supply source TVG is an example of a reference voltage supply source that supplies a reference voltage to a comparator that detects an abnormality such as a fire, and the power supply control means pswi only operates when detecting an abnormality such as a fire. This is an example of a power supply control means for supplying the reference voltage to the comparator.

Next, the operation of the above embodiment will be explained.

FIG. 3 is a flowchart showing the operation of the above embodiment.

First, perform initial processing such as clearing RAMI and RAM2 and setting initial values (Sl), and then
After setting the ON signal to F4 (S2), read the self-address of the repeater T1 that has been set in advance at the time of installation etc. from the dip switch DIP (33). When the reading of the self-address is completed (S4), An OFF signal is set to IF4 (S5).

Then, when the receiver RE also receives polling, that is, when the polling address and the self address stored in RAM2 match (S6), an ON signal is set to IF2 (S7), and the comparison result of the comparator CM, For example, the presence or absence of a fire signal is held in IFI (S8), and the data held in IFI is used to set an OFF signal in IF2 (S9).In other words, only when polling is received from receiver RE, IF2 is set to Hf. Since the gh signal is output, the transistor TR turns on only at that time, the power supply control means pswi becomes conductive, current flows to the reference voltage supply source TVG, and the reference voltage is applied to the input terminal of the comparator CM. When the reading of data from the comparator CM is completed, the transistor TR is turned off and no current flows to the reference voltage supply source TVG. Therefore, when no polling is received from the receiver RE, the lti? No wasteful power consumption occurs in the voltage supply source TVG.

If it is determined that a fire has occurred based on the output signal of the comparator CM (SIO), a fire signal is set in IF5 (S11), and fire information is transmitted to the receiver RE (S12).

In the above embodiment, the comparator CM, the power supply control means PSW
I, IFI, and IF2 may be replaced by microcomputers.

Further, a timer means may be provided as the power supply control means, and the reference voltage may be supplied to the comparator CM based on the output of the timer means, that is, only when the timer means is outputting.

In addition, in the above embodiment, the case of a monitoring repeater to which a fire detector etc. is connected was explained, but the terminal is connected to a fire door,
A controlled device such as a smoke prevention damper is connected, and this controlled device
In the case of an abnormality detector such as a repeater equipped with a comparator to detect the operating signal (operating state) of an m-device, or a fire detector equipped with a comparator to determine whether a fire phenomenon has exceeded a predetermined level. The same is true.

[Effects of the Invention] According to the present invention, a base for supplying a reference voltage to a comparator is provided. IP
This has the effect of reducing power consumption at the voltage supply source.

RE...receiver, T1~TN...repeater, pswi...power control means, CM... Comparator, TVG river reference voltage supply Source E: Flame detector.

Claims (3)

[Claims] (1) In disaster prevention equipment having terminals such as fire detectors and repeaters, a reference voltage supply source that supplies a reference voltage to a comparator that detects abnormalities such as fire or the operating status of controlled equipment; A power supply control device for disaster prevention equipment, comprising: power supply control means for supplying the reference voltage to the comparator only when the reference voltage is applied. (2) In claim (1), the power supply control means is configured to supply the reference voltage to the comparator when the terminal is called by a receiver. Control device. (3) In claim (1), the disaster prevention device is characterized in that the power supply control means has a timer means and supplies the reference voltage to the comparator based on the output of the timer means. Power control device in equipment.