JPH03142598A - Fire alarm - Google Patents

Abstract

PURPOSE:To enable fire alarm without delay by returning fire detection information to a receiver each time a call pulse is received from a receiver regardless of coincidence between a call address and a self-set address corresponding to a switch operation on a transmitter side. CONSTITUTION:When push switches 12 of transmitters 6a, 6b..., for which the addresses are respectively intrinsic, are turned ON, regardless of the coincidence between the successive call pulse caused by polling from a receiver 1 and the self-intrinsic set address, each call pulse is interrupted through an interruption sending means 50 and the fire detection information are sent to the receiver 1. These information are immediately decided by the receiver 1 and without delaying the fire alarm for the unit of a transmission line, the fire alarm is executed without applying uneasiness to an operator on the transmitter side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fire alarm device that calls a terminal device such as a transmitter by polling from a receiver and returns terminal information.

[Prior Art] Conventionally, as a fire alarm device employing a polling method, one shown in FIG. 6, for example, is known.

In Fig. 6, numeral 6 is a receiver, and an on/off type fire detector 4 is connected to a transmission line 2 led out from the receiver 1 via a repeater 3, and an analog sensor with a repeater function. A transmitter 5 and a transmitter 6 equipped with a push button switch are connected.

As shown in FIG. 7(a), the receiver 1 repeats polling in which, following a reset pulse, paging pulses for the number of terminals are sequentially sent out at a predetermined period.

a repeater 3 and an analog sensor 5 having a repeater function;
Each of the transmitters 6 calculates the calling address by counting the calling pulses from the receiver 1, and returns its own terminal information to the receiver when the calling address matches its own setting address. The terminal information is returned from the time it determines its own call until it receives the next call clock at address 2, as shown in the terminal device at address 1 determined by the first call clock in Figure 7(b). For example, eight states are set by a timer, a bit indicating fire detection information is set in state 4, and the fire detection information is returned to the receiver 1 at the timing of state 4, for example, in the current mode.

Receiver 1 performs the same state settings as the terminal device every time it sends out a paging clock, monitors whether or not terminal information is received in state 4, and receives terminal information in state 4. It was determined that there was a fire. However, since there is a possibility that a single fire alarm may be a false alarm, when a fire alarm is received from the same terminal twice in succession, it is judged as a real fire and a fire alarm is displayed accompanied by a bell ringing.

[Problems to be Solved by the Invention] However, in such a conventional fire alarm device, terminal devices are called one by one by polling, and in order to prevent false alarms, a fire alarm occurs when fire detection information is received twice. Because the system was designed to issue alarms, the transmitter 6, which has a low possibility of false alarms in which a person discovers and confirms the fire and then operates the push button switch, was treated in the same way as the detector, and it took a long time to notify the fire. There was a problem where the

For example, reset pulse period 100m5, N call clock period 15m5. Taking a device with 128 terminals as an example,
It takes about 4 minutes from when you operate the transmitter 6 until the bell rings.
It requires a processing time of about seconds.

For this reason, in the conventional device, the emergency bell does not sound immediately after the push button of the transmitter is operated, which may cause anxiety to the operator and cause unnecessary confusion.

The present invention has been made in view of these conventional problems. Fire detection information from terminal devices such as transmitters with a low possibility of false alarms can be quickly transmitted to receivers without being bound by polling rules. The purpose of the present invention is to provide a fire alarm device which can immediately issue a fire alarm such as ringing a bell after being returned to the factory.

[Means for Solving the Problems] First, the present invention connects terminal equipment such as a transmitter equipped with a switch means such as a push button switch and a fire detector for detecting fire to a transmission line led out from a receiver. , the receiver repeats polling in which, following a reset pulse, it sequentially sends out paging pulses for the number of terminals at predetermined intervals, and each of the terminal devices receives a paging pulse obtained as a result of counting the paging pulses from the receiver. A fire alarm device employs a polling method that returns its own terminal information to the receiver at a predetermined state timing set before receiving the next call pulse when the address matches the self-set address. set to target.

In the present invention for such a fire alarm device, when the transmitter obtains switch information by operating the switch means, the call pulse is sent to the transmitter regardless of whether the call address matches its own set address. The receiver is provided with interrupt sending means for sending out the switch information at a timing of another state different from the state set before receiving the next call pulse, and the receiver is provided with an The apparatus is equipped with a receiving means for receiving switch information sent from the interrupting/exiting means of the machine and determining a fire at the transmission line cliff level.

Further, the interrupt sending means provided in the transmitter includes a prohibition means for prohibiting sending of the switch information even if the switch/return operation is maintained after sending the switch information a predetermined number of times.

[Function] According to the fire alarm device of the present invention having such a configuration, when the push button switch is operated on the transmitter, the interrupt sending means sends a message regardless of whether or not the calling address matches the self-set address. , Every time a call pulse is received, the fire detection information due to the switch operation is sent back to the receiver at a timing different from the state in the original polling state, and the receiver receives the fire detection information twice. Even if reception processing is performed to determine that there is a fire, the fire detection information is returned at each interruptive call clock, and the fire is immediately determined and a fire alarm accompanied by the ringing of the emergency bell is performed, causing the operator of the transmitter to can be processed quickly without causing anxiety.

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

In FIG. 1, 1 is a receiver, and from the receiver 1, two transmission lines 2a and 2b are extended as transmission lines, and two transmitters 6a and 6b are connected between the transmission lines 2a and 2b. Connected. The transmitters 5a and 5b are connected to the relay part 0 and the push button switch 12.
Consists of. Of course, as shown in FIG. 6, an on/off type sensor 4 is connected between the transmission lines 2a and 2b via a repeater 3, and an analog sensor 5 with a repeater function is also connected. .

Receiver 1 has a CP that performs polling and fire reception processing.
Under the control of the CPU 14, a paging circuit 16 performs polling in which, following a reset pulse, paging pulses for the number of terminals are sequentially sent between the transmission lines 2a and 2b. In response to polling by a calling pulse from the receiver 1, the relay section to of the transmitters 6a and 6b is equipped with an address counter, and sequentially counts the calling pulses obtained after being reset with a reset pulse to obtain a calling address.
The self-setting address set in advance and the calling address are compared, and when the two match, it is determined that the call is self-calling, and if the push button switch 12 is turned on at this time, the switch information, that is, the transmitter fire detection information is transmitted. It is sent back to receiver 1.

As shown in Figure 7(b), the transmitter fire detection information is sent back in one of the multiple states set by the timer between when it determines its own call and when it receives the next call pulse. For example, this is carried out in a current mode in which a predetermined current is passed between the transmission lines 2a and 2b at the timing of state 4.

Terminal information returned from the transmitters 6a, 6b in current mode is converted into a voltage signal by the current detection resistor 18 of the receiver 1, and is taken into the CPU 14 via the amplifier 20 and input interface 22. The CPU 14 monitors whether terminal detection information is obtained from the input interface 22 at the timing of state 4 after sending out the calling pulse, and determines that a fire has been received when the terminal detection information is obtained.

Further, when the CPU 14 receives two consecutive fire receptions from the same terminal, it determines that there is a real fire and issues a fire alarm.

Bell wires 24a and 24b are drawn out from the receiver 1 to the guarded area where the transmitters 6a and 6b are installed, and the bell wire 24
A district bell 26 is connected between a and 24b, and a terminating resistor 28 for detecting disconnection is connected to the end of the line. A switch contact 30 is provided in the receiver 1 on the side of the bell wire 24a, and when the CPU 14 determines that there is a fire, the switch contact 30 is closed to supply power between the bell wires 24a and 24b, and the area Ring the bell 26.

Furthermore, in the present invention, the relay section 10 of the transmitters 6a, 6b
When the transmitter fire detection information (switch information) is obtained by operating the pushbutton switch 12, regardless of whether or not the calling address matches the self-configured address, each time a calling pulse is received, the original calling The transmitter fire detection information is transferred to the receiver t at a state other than state 4, which is the exit timing of the transmitter fire detection information, for example, at the timing of state 2.
A function is provided as an interrupt sending means 50 for sending back a message. Corresponding to the function as the interrupt sending means 50 provided in the relay section 10 of the transmitters 6a, 6b, the CPU 14 of the receiver I
In this case, it is monitored whether or not fire detection information is obtained via the input interface 22 at the timing of state 2 set between sending out a calling pulse and sending out the next calling pulse, and at the timing of state 2. When fire detection information is obtained, it is impossible to detect the terminal address, but a receiving means is provided that determines that the transmitter is operated on one of the transmission lines and issues a fire alarm. The receiving means that receives the fire detection information sent in state 2 and determines a fire determines that it is a real fire, for example, when it receives fire detection information three times in a row at the timing of state 2. do.

FIG. 2 is an embodiment configuration diagram showing a specific embodiment of the relay section 10 in the transmitters 6a, 6b shown in FIG.

In FIG. 2, the transmitter relay section 10 is a terminal.

Transmission lines 2a and 2b from the receiver 1 are connected to C, and a rectification noise absorption circuit 32 is provided following the terminal C. For example, a diode bridge is used for the rectification noise absorption circuit 32, which makes the connection polarity of the transmission lines 2a, 2b by the terminal C non-polarized and absorbs noise from the transmission line.

Following the rectification noise absorption circuit 32 is the transmission signal detection circuit 3
4 is provided, and a reset pulse and a calling pulse sent from the receiver 1 are detected by a transmission signal detection circuit 34. Subsequently, a constant voltage circuit 36 is provided, and a power ON reset circuit 38 . Response current control circuit 40. Transmission control circuit 42. An address setting circuit 44 and a signal control circuit 46 are provided.

The transmission control circuit 42 controls reception and transmission according to polling rules, and receives the setting of its own calling address by the address setting circuit 44. Transmission control circuit 42
An address counter is provided, and this address counter is cleared by the detection output of the reset pulse by the transmission signal detection circuit 34, and is incremented by the detection output of the subsequently obtained calling pulse, thereby creating a calling address. The calling address counted by the address counter is compared with the own address set by the address setting circuit 44, and if the two match, the terminal information is returned to the receiver 1. This terminal information return operation is performed by setting bits at the timing of a plurality of states set between the reception of a paging pulse with an address match and the reception of the next paging pulse. Specifically, the transmission control circuit 42 is supplied with the switch output of the pushbutton switch 12, and when the switch ON signal when the pushbutton switch 12 is turned on is supplied, the transmission control circuit 42 enters state 4. Bits as return information are output to the signal control circuit 46 at the timing of . Transmission control circuit 4
The signal control circuit 46, which receives the transmission bit information from state 2 to state 4, outputs a control signal corresponding to the transmission bit of state 4 to the alarm signal drive circuit 48, and turns on the transistor while the bit of state 4 is set. Fire detection information is sent back in a current mode in which the sister 50 is turned on and a predetermined current is passed between the transmission lines 2a and 2b.

The response current control circuit 40 receives terminal information other than fire detection information,
For example, it is used to respond with terminal information indicating a normal state or type information indicating that the terminal is a transmitter.For example, state 5. 6. 7, the transmission bit is given from the transmission control circuit 42 to the response current control circuit 40, and a predetermined current is caused to flow through the transmission lines 2a and 2b through the constant voltage circuit 36 by the operation of the internal switching means. Exit terminal information using current mode.

Furthermore, in order to prevent malfunctions when the power is turned on, the power ON reset circuit 38 prohibits the operation of the signal control circuit 46 in a transient state after the power is turned on, and when the power is stabilized after the transient state, the signal control circuit 46 is disabled. Cancel operation prohibition.

Furthermore, the output of the alarm signal drive circuit 48 is connected to a transistor 52.
It is also given for 54. The transistor 52 is a switching means for transmitting information, and has a photocoupler light emitting diode 56 connected to the collector side, and a photocoupler phototransistor 58 whose lower side shows light generated by driving the light emitting diode 56 when the transistor 52 is turned on. is turned on, and the transfer terminals TL and TC are short-circuited to output a transfer signal.

The transistor 54 is used to display the calling operation state of the relay section 10, and the transmission control circuit section 42 turns on the transistor 54 based on an address match signal obtained by comparing the calling address with its own setting address, and the transistor 54 is connected to the collector of the transistor 54. The connected light emitting diode 60 is temporarily turned on, and by repeating the lighting of the light emitting diode 60, it can be known from the outside that the relay section 10 is operating normally.

In addition, in the transmitter relay section 10 of the present invention, the signal control circuit 46 is provided with a function as an interrupt sending means. In order to realize this function as an interrupt sending means, the output of the push button switch 12 is directly supplied to the signal control circuit 46, and also the detection output of the calling pulse from the transmission signal detection circuit 34 is supplied. When the signal control circuit 46 receives a switch signal from the ON operation of the push button switch 12, it starts a state 2 setting timer based on the call pulse from the transmission signal detection circuit 34, and issues an alarm at the timing of state 2 by this state timer. Signal drive circuit 48
A return signal of the transmitter fire detection information is output to the transmitter, and a current is caused to flow between the transmission lines 2a and 2b at the timing of state 2 by turning on the transistor 50, and the transmitter detection information is interruptively sent to the receiver 1 in the current mode. Send it back.

Next, the operation of the embodiment of the present invention shown in FIG. 1.2 will be explained with reference to the timing chart of FIG.

Now, assume that address 3 is set to transmitter 6a and address 4 is set to transmitter 6b shown in FIG.

Assume that the push button switch 12 of the transmitter 6a, in which address 3 has been set, is turned on at a timing immediately before the reset pulse in the receiver call signal shown in FIG. This transmitter 6a
By turning on the push button switch 12, the signal control circuit 46 shown in FIG. 2 enables the control operation as an interrupt return means.

Therefore, when the first ringing pulse indicated by address t is received following the reset pulse, the signal control circuit 46 starts the state timer and sets the receiver l in the current mode at the state 2 timing set by the state timer. Returns a terminal response signal.

That is, according to the original polling rules, the call of the transmitter 6a is determined upon reception of the third call pulse following the reset pulse indicated by address 3, and the transmitter fire detection information is returned at the timing of state 4. However, in the present invention, the push button switch 12 is operated at the timing of state 2 following every call pulse, regardless of the return of fire detection information in state 4 according to this boring rule. Transmitter fire detection information is being sent back from the transmitter 6a.

In response to the return of the transmitter fire detection information from the transmitter 6a performed in state 2, the CPU 14 of the receiver 1
is designed to determine that there is a fire when fire detection information is received three times in a row at the timing of state 2. Therefore, the transmitter fire detection in state 2 following the calling pulse indicated by the third address 3 from the reset pulse When receiving the information, the receiver 1 determines that there is a fire, and the CPtJ 14 closes the switch contact 30 to supply power between the bell wires 24a and 24b to ring the district bell. Therefore, when the push button on the transmitter is operated, the bell will ring immediately, with almost no time delay according to conventional polling rules. It should be noted that the fire detection information from the transmitter 6a at address 3 can be decoded by the return of state 4 following the call pulse at address 3.

FIG. 4 is a configuration diagram showing another embodiment of the present invention. In this embodiment, the transmitter transmits a predetermined number of times for each ringing pulse at the timing of state 2 by the interrupt sending means on the transmitter side. The present invention is characterized in that after sending out the fire detection information, sending out the transmitter fire detection information is prohibited.

That is, a plurality of transmitters are connected between the transmission lines 2a and 2b from the receiver 1, and in the event of a fire, not only one transmitter but also multiple transmitters can be pressed at the same time. There is a possibility that it will be done. When the push buttons of multiple transmitters are pressed in this way, the transmitter fire detection information in the current mode is sent to the receiver 1 at the timing of state 2 following the ringing pulse of all the transmitters whose buttons have been pressed. It is done all at once. Therefore, a composite current of multiple oscillators operating the push button switches at the timing of state 2 will flow between the transmission lines 2a and 2b, and the line voltage between the transmission lines 2a and 2b will drop significantly due to the increase in current. However, not only the transmitter but also other repeaters and analog sensors connected between the transmission lines 2a and 2b stop functioning.

Therefore, in the embodiment shown in FIG. 4, in order to prevent the line voltage from decreasing due to duplicate transmission of return information in current mode at the timing of state 2 due to push button operations of multiple transmitters, the push button switch is state 2 after operating
When the transmitter fire detection information is transmitted, for example, seven times at the timing of , the transmitter itself is prohibited from transmitting the fire detection information in state 2.

That is, the relay section 10 of the transmitter 6a representatively shown in FIG.
As shown in the figure, A is used as a circuit that prohibits further transmission of fire detection information after transmitting fire detection information in state 2 for a predetermined number of times.
An ND gate 62 and a counter 64 are provided. AND
A return bit is given to one of the gates 62 at the timing of state 2. Also, AND gate 62
The output of the counter 64 is given to the other input of the counter 64, and the counter 64 inputs the return bit of state 2 obtained through the AND gate 62 as feedback and counts it.

When the count content is less than 7, the counter 64 generates an H level output and puts the AND gate 62 in the permissible state, and when the count content reaches 7, it generates an L level output due to overflow and AN
The D gate 62 is placed in an inhibited state.

The CP of the receiver 1 corresponds to the prohibition means that limits the number of times the reply information is sent by state 2 on the transmitter 6a side.
A counter 66 is provided in the receiving means implemented by U14. The counter 66 counts up every time it receives transmitter fire detection information via the input interface 22 at the timing of state 2, and when the count reaches 3, it overflows and determines that there is a real fire.

Next, the operation of the embodiment shown in FIG. 4 will be explained with reference to the timing chart shown in FIG.

In FIG. 5, as in the case of FIG. 3, if the pushbutton switch 12 of the transmitter 6a having address 3 is operated, the transmitter 6a sends the receiver 1 to the receiver 1 at the timing of state 2 for each calling pulse following the reset pulse. A terminal response signal, that is, transmitter fire detection information is sent back in current mode. This transmitter fire detection information is returned by AND gate 62.
Since the counter 64 produces an H level output when the count is less than 7, the AND gate 62 is in the permissive state, and the state 2 return bit passes through the AND gate 62. and second
The signal is applied to the alarm signal drive circuit 48 shown in the figure.

As shown in FIG. 5, the counter 64 provided in the transmitter 6a counts up every time the state 2 reply bit is sent out, and when the count reaches 7, it overflows and switches to the L level output, and the AND gate 62 By setting this to the inhibited state, the subsequent output of the state 2 reply bit is prohibited.

On the other hand, the counter 66 of the receiver receives the transmitter fire detection information sent back at the timing of state 2 following the call pulse and counts up, and when the count reaches 3, it outputs a fire judgment output. bring about

In the explanation of the operation shown in FIG. 5, the number of times the transmitter sends the response information is 7 times, and the number of times the receiver 1 receives the information for fire judgment is 3 times. It may be the number of times. Of course, the number of times the receiver receives the fire for determining a fire is smaller than the number of times the transmitter sends back the message.

In addition, although the above embodiment takes as an example a transmitter that transmits fire detection information by manually operating a push button switch as a terminal device with a low possibility of false alarms, there are other terminal devices with a low possibility of false alarms. For example, a heat sensor is known as a terminal device, and the heat sensor also receives fire detection information at the timing of state 2 of each call clock when detecting a fire, regardless of the polling rule, in the same way as in the case of a transmitter. It is also possible to send the data to Furthermore, terminal information other than a transmitter or a heat sensor may also be configured to return terminal information in an interruptive manner according to the present invention, if necessary.

[Effects of the Invention] As explained above, according to the present invention, when a push button switch is operated on a transmitter, a calling pulse is received from a receiver regardless of whether or not the calling address matches its own set address. The fire detection information from the transmitter can be sent back to the receiver at a timing different from the state in the original bowling each time the fire detection information is received. Even if the process is carried out, the operation of the transmitter switch can be immediately judged as a fire and a fire alarm accompanied by the ringing of an emergency bell can be issued, causing anxiety to the transmitter operator due to the delay in the fire alarm. You can prevent it from happening.

In addition, by applying it not only to transmitters but also to terminal information that requires a quick response to abnormality detection without waiting for polling, it is possible to ensure that the receiving side can properly respond without any time delay even if a polling method is used. Able to process judgments.

[Brief explanation of the drawing]

Figure 1 is an embodiment configuration diagram showing the overall configuration of the present invention;
The figure shows an embodiment of the transmitter relay section of the present invention; FIG. 3 is an operation timing chart of the present invention; FIG. 4 is a block diagram showing another embodiment of the present invention; FIG. FIG. 6 is a configuration diagram of a conventional device; FIG. 7 is an operation timing chart of conventional polling. ↓: Receiver 2: Transmission lines 2a, 2b: Transmission lines 6a, 6b: Transmitter 10: Relay section 12: Push button switch 14: CPU 16: Calling circuit 18: Current detection resistor 20: Amplifier 22: Input interface 24a, 24b : Bell wire 26: District bell 28; Terminating resistor 30: Switch 32: Rectification noise absorption circuit 34: Transmission signal detection circuit 36: Constant voltage circuit 38: Power ON reset circuit 40: Response current control circuit 42: Transmission control circuit 44 Address setting circuit 46: Signal control circuit 48: Alarm signal drive circuit 50.52.54 + transistor

Claims (1)

[Claims] 1. A terminal device such as a transmitter equipped with a switch means such as a push button switch or a fire detector for detecting fire is connected to the transmission line led out from the receiver, and the receiver is reset. Following the pulse, polling is repeated to sequentially send as many paging pulses as the number of terminals at a predetermined period, and each of the terminal devices determines whether the paging address obtained as a result of counting the paging pulses from the receiver becomes its own set address. In a fire alarm device that returns its own terminal information to the receiver at a predetermined state timing set until receiving the next call pulse when a match is received, the transmitter is provided with the switch means. When switch information is obtained by operation, the state is different from the state set each time the call pulse is received until the next call pulse is received, regardless of whether the call address matches the self-configured address. Interrupt sending means for sending out the switch information at the timing of another state is provided, and the receiver receives the contact information sent from the interrupt sending means of the transmitter to detect a fire in each transmission line. A fire alarm device characterized in that it is provided with a receiving means for making a judgment. 2. The interrupt sending means includes a prohibiting means for prohibiting sending of the switch information even if the switch operation state is maintained after sending the switch information a predetermined number of times. Fire alarm system.