JP2006285502A - Fire sensor, fire receiver, and fire-reporting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire sensor, a fire receiver, and fire-alarm equipment provided with a fire signal reception means which receives fire signals from fire sensors, which are connected to a plurality of fire-sensor lines and output the fire signals via the fire-sensor lines by switching operation, the fire receiver easily synchronizing with pulses which are transmission signals when the fire sensors transmit the transmission signals. <P>SOLUTION: A P-type fire alarm equipment can acquire address information from fire sensors with addresses. In this case, the fire alarm equipment operates to restore the fire sensors when a fire receiver receives fire signals. The fire alarm equipment acquires the address information from the fire sensors, by means of transmission signals, on the basis of the timing of the restoration. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a fire detector having an address in a P-type system fire detector.

  In a P-type system, a system for acquiring a unique address of a fire detector that has been issued is disclosed (for example, see Patent Document 1). Then, when the fire receiver acquires the specific address of the fire detector that has been issued, the transmission signal is used, the current indicating bit is used to modulate the information, and the fire detector side takes the timing, The fire receiver controls the current value corresponding to the above bits, and the fire receiver detects when 9 logical 1 series “111111111” are obtained from the digital signal obtained based on the timing of the sampling clock. Then, the address of the fire detector is recognized from the following 7-bit information.

  In this way, when transmitting a transmission signal at the timing of the fire detector side, in order to use a large number of fire detectors, it is necessary for each fire detector to transmit at the same speed, such as the number of clocks of the microcomputer etc. Accuracy is required.

Also, when a pulse is formed by modulating the voltage of the signal line as a transmission signal, the pulse waveform is rounded depending on the length of the signal line. It is important to keep the timing of transmission to and from the device properly.
JP 2003-099869 A

  In a system having an address for an automatic test function in a P-type system, transmission is performed via a pair of power and signal lines of C line and L line.

  As an automatic test operation, the fire receiver changes the voltage between C and L to the Hi / Lo level and sends a command. The fire detector having the address specified by this command responds, Perform control action. Further, when a fire is detected, the fire detector sets a low-level holding state between CL and sends a notification signal to the fire receiver in units of lines, as in a general P-type system.

  However, in the system as described above, the results of the automatic test function can be collected from individual fire detectors. However, the fire receiver is one of the multiple fire detectors connected to the fire detector line. There is a problem that the detector cannot recognize whether a fire has been triggered.

  Also, a method has been devised in which the L0 level is divided into two or more types by voltage, and transmission is performed with the line voltage further lowered from the L0 level, but there is a drawback that the circuit for switching the line voltage becomes complicated. is there.

  In other words, the conventional P-type fire detector sends a fire signal to the fire receiver by switching the line voltage to the Lo level, but the fire detector may transmit in the Lo level state. There is a problem that the fire detector that sent the fire signal cannot send its own address to the fire receiver.

The present invention comprises a fire signal receiving means for receiving the fire signal from a fire detector connected to a plurality of fire detector lines and outputting a fire signal by a switching operation via each of the fire detector lines. To provide a fire detector, a fire receiver, and a fire alarm facility in which it is easy for a fire receiver to take the timing of a pulse as a transmission signal when the fire detector transmits a transmission signal in a fire alarm facility. It is intended.

The present invention performs an operation of restoring the fire detector when the fire receiver receives a fire signal in a P-type fire alarm facility capable of acquiring address information from a fire detector with an address, Based on the timing of this recovery operation, address information is acquired from the fire detector by a transmission signal.

According to the present invention, since the recovery operation of the fire receiver is used as a timing reference between the fire receiver and the fire detector, the transmission transmitted by the fire receiver when the fire detector transmits a transmission signal. There is an effect that it is easy to take the timing of the pulse indicating the signal.

  The best mode for carrying out the invention is the following examples.

  FIG. 1 is a diagram showing a P-type system PS1 that is Embodiment 1 of the present invention.

  The P-type system PS1 is connected to a plurality of fire detector lines, and includes a fire signal receiving means for receiving the fire signal from a fire detector that outputs a fire signal by switching operation via each fire detector line. Fire alarm system, fire receiver RE1, line C, L1 to Ln, fire detector SE1 with an address that outputs a fire signal by switching operation when a fire phenomenon is detected, and general fire detector SE2 Have.

  The fire detector SE1 with an address is a P-type fire detector that holds its own address, and the general fire detector SE2 is a P-type fire detector that does not hold its own address. is there.

  In the P-type system PS1, a plurality of addressed fire detectors SE1, a general fire detector SE2, and a P-type transmitter T1 are connected to one fire receiver RE1.

  Each of the fire detectors SE1 and SE2 is supplied with power from the fire receiver RE1, measures physical quantities such as smoke concentration and ambient temperature, and performs fire monitoring. Note that the fire detectors SE1 and SE2 are selectively installed according to the installation location.

  FIG. 2 is a block diagram showing the fire receiver RE1.

  The fire receiver RE1 includes a power supply unit 11, a signal transmission circuit 12, a signal reception circuit 13, a fire detection circuit 14, a disconnection detection circuit 15, a control circuit 16, a main control unit 17, and a display operation unit 18. And have.

  A common terminal C to which the power / signal line is connected and a plurality of line terminals L1 to Ln are provided, and a fire with a plurality of addresses is connected to the line connected to the common terminal C and the plurality of line terminals L1 to Ln. A sensor SE1 and a general fire sensor SE2 are connected. That is, each line is configured between the terminal C and the terminals L1 to Ln, and a terminator is disposed at each terminal portion. Of the block configuration in the fire receiver RE1, the signal transmission circuit 12, the signal reception circuit 13, the fire detection circuit 14, the disconnection detection circuit 15, and the control circuit 16 are arranged for each line. It arrange | positions for every L1-Ln.

  Here, the control circuit 16 provided in the terminals L1 to Ln is an example of a fire recovery signal transmitting unit that transmits a fire recovery signal to the fire detector after receiving the fire signal. FIG. 5 is an example of command transmission means for transmitting a command for instructing to return a fire detector specifying signal for specifying the fire detector that has transmitted the fire signal to the fire receiver after transmitting the fire recovery signal.

  FIG. 3 is a block diagram showing the fire detector SE1 with an address.

  The fire detector SE1 with address includes a light emitting circuit 31a1, a light receiving circuit 31a2, an amplifying circuit 31b, a transmitting circuit 41, a receiving circuit 42, a constant voltage circuit 51, a power circuit 52, a charging circuit 53, and a timer. The circuit 61, a microcomputer 71 as a control circuit, a clock oscillation circuit 81, an EEPROM 91 in which addresses and the like are stored, and a diode bridge DB are included.

  That is, in the first embodiment, the light emitting circuit 31a1 and the light receiving circuit 31a2 are examples of fire detection means for detecting a fire phenomenon. The transmission circuit 41 is an example of a fire signal transmission unit that outputs a fire signal by a switching operation when the fire detection unit detects a fire phenomenon. Further, the control circuit 71, when receiving the fire recovery signal from the fire receiver after the fire alarm signal transmitting means has issued the fire, outputs a fire detector specifying signal for specifying the own fire detector that has transmitted the fire signal. It is an example of the fire detector specific signal sending means to send out.

  Next, the operation of the first embodiment will be described.

  FIG. 4 is a flowchart illustrating the operation of the first embodiment.

  FIG. 5 is a time chart illustrating the operation of the first embodiment.

  First, in the P-type system PS1, when the fire detector SE1 with an address detects a fire at time t1 (S1), the terminal CL is held at the Lo level (S2), and the fire receiver RE1 Then, the fire detector is detected (S11). Then, the fire receiver RE1 temporarily restores the signal line terminals CL to the Hi level at time t2 to t3 by the accumulation recovery process (S12), whereby the fire detector SE1 with address is activated. Restore (S3).

  Then, for the fire detector SE1 with the fire-reported address, a “report fire detector specific command” which is a command for instructing to return the address for specifying the fire detector to the fire receiver RE1, At time t4, the fire receiver RE1 sends out (S13). When the fire detector SE1 with the address that received the notification receives the “report fire detector specific command” (S4), the fire detector SE1 with the address responds at time t5 (S5), Return to fire receiver RE1.

  Based on the response of the fire detector SE1 with address, the fire receiver RE1 identifies the address of the fire detector SE1 with the address that caused the fire (S14), and which fire detector is in the receiving panel of the fire receiver RE1. Whether a fire has been reported is displayed (S15). Then, at time t6, the addressed fire detector SE1 generates the second report in order to indicate that a fire has been detected.

  In addition, when the above-mentioned “report fire detector specific command” is sent, if the timing for returning the fire detector to the fire receiver RE1 is defined for each fire detector address, the fire detector SE1 with a plurality of addresses is provided. Even when the alarm is issued, the addresses of the plurality of addressed fire detectors SE1 can be specified.

  According to the above embodiment, the recovery operation of the fire receiver RE1 is used as a timing reference between the fire receiver RE1 and the fire detector SE1, so that when the fire detector SE1 transmits a transmission signal, the fire reception is received. It is easy for the machine RE1 to take the timing of the pulse indicating the transmission signal.

  Moreover, according to the said Example, it is not necessary to obtain | require high-precision operation speed about the fire detector provided with two or more.

  Furthermore, according to the above-described embodiment, the addressed fire detector SE1 side does not need to prepare for transmission by transmitting itself (by stopping the fire signal), and by the recovery operation of the fire receiver, The signal line returns to the normal state, and the transmission signal can be transmitted.

  According to the above embodiment, the fire receiver continues the fire signal from the signal line for a predetermined accumulation time, so that the fire receiver can perform a fire alarm operation at that time, The acquisition of the address of the reported fire detector SE1 is executed after the fire alarm operation.

  Also, according to the above embodiment, when the fire receiver acquires information other than the address information of the fire detector, by sending a command to that effect (command other than the fire alarm specific command), It is possible to cope with collecting other information (for example, analog information indicating a detection value, fire detector type information, and the like).

  According to the above-described embodiment, it is possible to respond from a plurality of fire detectors by the fire alarm detection command, so even if a plurality of fire detectors are triggered on a single line, a plurality of fire detectors are notified. A fire detector can be identified.

  The recovery operation of the fire receiver can be performed even during reception of the fire signal, and the fire receiver receives a pulse of the transmission signal from the fire detector based on its own operation. In addition, the fire detector can send out a fire detector identification signal that identifies the fire detector that transmitted the fire signal based on the rise of the line voltage from the restoration. And the fire detector, the timing of transmission is determined with reference to the recovery signal, and thus information can be accurately received.

In the case of a fire signal from a general fire receiver SE2, even if the fire receiver RE1 sends an alarm detector specific command after restoration of storage, there is no response of the address, but as a general P-type system Since fire alarm operation is possible, it is not a problem.

It is a figure which shows P type system PS1 which is Example 1 of this invention. It is a block diagram which shows the fire receiver RE1. It is a block diagram which shows fire detector SE1 with an address. 3 is a flowchart showing the operation of the first embodiment. 3 is a time chart showing the operation of the first embodiment.

Explanation of symbols

PS1 ... P type system,
RE1 ... Fire receiver,
SE1 ... Fire detector with address,
SE2 ... General fire detector,
T1 ... P type transmitter,
12 ... Signal transmission circuit,
13: Signal receiving circuit,
14 ... Fire detection circuit,
41 ... Transmission circuit,
71: Control circuit.

Claims (4)

Fire detection means for detecting fire phenomena;
Fire signal transmitting means for outputting a fire signal by switching operation when the fire detecting means detects a fire phenomenon;
After receiving the fire recovery signal from the fire receiver after the above fire signal transmitting means has transmitted the fire signal, the fire detector specifying signal for sending out the fire detector specifying signal for identifying the fire detector that transmitted the fire signal Sending means;
A fire detector characterized by comprising: With multiple fire detector lines;
A fire receiver connected to the plurality of fire detector lines;
When the fire detection means detects a fire phenomenon, the fire signal transmission means that outputs a fire signal by switching operation, and the fire signal transmission means sends a fire signal and receives a fire recovery signal from the fire receiver, A fire detector comprising a fire detector specifying signal sending means for sending a fire detector specifying signal for specifying the transmitted fire detector;
A fire alarm facility characterized by comprising: In a fire alarm facility provided with a fire signal receiving means for receiving a fire signal from a fire detector that is connected to a plurality of fire detector lines and outputs a fire signal by a switching operation via each of the fire detector lines. ,
Fire recovery signal transmitting means for transmitting a fire recovery signal to the fire detector after receiving the fire signal;
Command transmitting means for transmitting a command instructing to return a fire detector specifying signal for specifying the fire detector that has transmitted the fire signal to the fire receiver after transmitting the fire recovery signal;
A fire receiver characterized by comprising: In a fire alarm facility provided with a fire signal receiving means for receiving a fire signal from a fire detector that is connected to a plurality of fire detector lines and outputs a fire signal by a switching operation via each of the fire detector lines. ,
Fire recovery signal transmitting means for transmitting a fire recovery signal to the fire detector after receiving the fire signal, and a fire detector for identifying the fire detector that transmitted the fire signal after transmitting the fire recovery signal A fire receiver having command transmission means for transmitting a transmission command command for instructing to transmit a specific signal to the fire receiver;
A fire detector for transmitting a fire detector specifying signal for specifying its own fire detector in response to the transmission command command when the self transmits a fire signal;
A fire alarm facility characterized by comprising:

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