JPS5876992A - Automatic sensor restoring circuit - 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 The present invention relates to the prevention of false alarms in a fire alarm V-stem that notifies other places, such as a security insurance company, when a fire detector fires an alarm.

Previously, Marudachi was notified by the first alarm from the fire detector, so even a false alarm from a detector that was not an actual fire would be reported, making it possible for this to be an actual fire.

It was impossible to determine whether it was a false alarm without going to the location where the sensor was installed.

In view of the above problems, the present invention is designed to notify the outside of the building when the first sensor alarm is triggered and a certain set time has elapsed since the first sensor alarm. The purpose is to obtain a sensor automatic recovery circuit.

The present invention will be explained below with reference to a circuit diagram and a time chart of an embodiment.A large fire receiver B has a detector automatic recovery circuit, and a detector is also connected to the power supply of the fire receiver A, &1 and a detector dij.
r SX, . . . Relay operated by the output operation 4.・
... are connected in series through the normally open contact f4, and further in parallel with this are the normally open contacts zn of Q V -Zl,...Zn.
.

...The old CJL circuit section is connected through Zn1. This recovery circuit section B has a capacitor CI for noise absorption, and a voltage divided by 8 to two resistors at the gate. A voltage sensing element f) consisting of LJT is added, and the divided voltage of the resistor Rs and the integral effect capacitor C is added to the anode, and the cathode is connected to the relay D and the diode for preventing the back electromotive force. A parallel circuit consisting of two timers 1.4 and a relay E into which the normally closed contact t1 of a timer 1- is inserted is connected in parallel with the restoration circuit section B1.

In addition, the time settings for timer Ts and 'Dm are 't>
% binding. The relay E has a normally open contact [phase] for self-holding, and the two timers Tla ``J are connected to the C power supply through this contact e. The relay F is connected to the power source through the normally open contact Ll and the normally open contact z1.

On the common side Lc of the sensor line S, a normally closed contact d of a relay D is connected in parallel to the normally open contact f4 of the relay F.
There is. Other relay contacts of relay F are used to transfer signals to other locations. In this case, the V-contacts are normally open;
It doesn't matter whether it's normally closed or not. Q v -ZL, -...
The self-holding normally open contact z is recognized,...S 3, and the relay F.
The normally open contacts f3 are connected in series, thereby self-holding. .

For example, when a sensor operates, an excitation current flows through the normally closed contact d of the receiver A, and the relay operates.
n1 and contact Znl are closed. When the contact Znl closes, the voltage at one node of the two sensing elements PUT is connected to the gate of the voltage sensing element PUT.The voltage at one node of the two sensing elements PUT gradually rises to the integrating circuit of the resistor island and the capacitor Cs.When the anode voltage becomes higher than the gate voltage, the voltage is detected. Element PLTT is turned on and v-D operates. However, when the IJ radar D operates, its normally closed contact d opens and the sensor common line opens, so the power to the sensor So is cut off and restored, and the relay is also restored.

If the sensor S1 r...8m is in the operating weight or continues to be in the "C" operating state, the relay z1. ...The system operates, and the voltage detection element PUT and relay D are normally open contacts t of timer 1.
, enters the circuit of relay F, so that the above operation is repeated within the time set by timer 1.

On the other hand, when - contact 2 closes, relay E operates and °C
Contact C is closed, relay E is self-holding, and two timers are activated)
, which also supplies power to birds.

After timer 1 operates and closes the CC constant contact, I!
When the IJI/
-F is supplied with power, and the normally open contact i1 of relay F closes [self-holding]. When relay F operates and closes the normally open contacts, Sv-Zn is self-maintained by the circuit of +g4v -Zn -Zal- normally open contacts f and 4G, and the sensor - is restored. do not. My father will also transfer the information to other locations using the contact point IS.

The timer bird is used to set the circuit to the initial state when T1 seconds have passed since one of the sensors...- is activated and the second sensing signal C does not come. When timer T and T are activated, the power to relay E is cut off and the two timers A and T are returned to their initial state.

As mentioned above, in a fire reporting system that notifies other places when a detector fires, the detector is restored within a certain set time from the #1 #A of the detector, and then the time for reporting is set. It has a timer #1, a recovery circuit unit that restores the sensor during the set time of the timer, and a timer #s2 that sets the time to put the circuit into the initial standby state after a time longer than the 1tIiii3-timer has passed. Since the sensor is an automatic recovery circuit, it will not issue a notification even if the sensor alarms continue for a certain set time after the first sensor alarm, and the sensor will not emit the sensor again within a certain set time after that. When a fire alarm is received, the first alarm is sent to the fire alarm, so the probability of false alarms is significantly reduced compared to the conventional method of reporting using the first alarm from a fire detector.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a time chart. A...Fire receiver, B...Detector automatic recovery circuit, B
. ...Recovery circuit section, T, , l-...Timer, S
I...Add...Sensor. Patent applicant: Matsudoden 1: Daisanjin Co., Ltd. Somaru Takemoto (and 2 others)

Claims (1)

[Claims] l) In the fire notification V system that notifies other places by the alarm of the detector, the first part sets the time to restore the detector and report to the next meeting within the set time from the first part of the detector. A sensor having a timer, a recovery circuit section for restoring the sensor during the set time of the timer, and a second timer for setting a time for putting the circuit into an initial standby state after a time longer than the timer has elapsed. Automatic recovery circuit.