JP2688066B2 - Fire alarm equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fire alarm system, and in particular, an analog type or normal type fire detector having a plurality of fire phenomenon detectors receives a receiver or a repeater. The present invention relates to a fire alarm facility which is connected to the fire department and collects fire monitoring information such as an analog quantity signal or a fire signal from each fire detector by polling.

[Prior Art and Problems] There are photoelectric smoke sensors, ionization smoke sensors, temperature sensors, gas sensors, radiation temperature sensors, etc. as fire detectors or fire sensors connected to receivers. Transmits individually an analog amount signal detected by a fire phenomenon detection unit in these sensors or a fire occurrence signal determined based on the analog amount to a receiving unit such as a receiver or a repeater.

Recently, with the improvement of semiconductor technology and the spread of custom ICs and the like, it has become possible to integrate the fire phenomenon detection units having different detection principles into one sensor. In this way, one sensor or sensor has a photoelectric or ionization type smoke detector,
If a plurality of fire phenomenon detection units such as a temperature detection unit are provided in an integrated manner, the number and area of the sensors to be installed can be reduced, and the size of the sensors can be reduced.

In this case, it is preferable that the receiver collects data by polling in the same transmission format as the conventional one, and for that purpose, it is necessary to set an address to each fire phenomenon detection unit in the same sensor. By setting the address for each fire phenomenon detection unit in this way, the receiver can send a data return command to the address corresponding to each fire phenomenon detection unit. If the DIP switch for address setting is prepared for each fire phenomenon detection unit as in the past, the number of DIP switches is required for each fire phenomenon detection unit. There is a problem that a large area is required by the dip switch, so that the number of sensors to be installed or the installation area is reduced, or the significance of downsizing of the sensor is not fully utilized.

[Means for Solving the Problems] Therefore, an object of the present invention is to provide a system in which a fire detector having a plurality of fire phenomenon detecting units is connected to a receiving unit such as a receiver or a repeater. (EN) It is possible to provide a fire alarm equipment which enables a unit to collect data from each fire phenomenon detection unit in the same transmission format as the conventional one and does not require a large installation area for an address setting means.

In order to achieve this object, according to the present invention, a fire detector (SE ₁ ; analog type or normal type) having a plurality of fire phenomenon detection units (FS21, FS22, FS23) may be a reception unit (RE).
The fire detector (SE
_{1 ~SE N)} from the analog weight signal or a fire signal such as fire monitoring information (analog sensor level For the, in the case of normal type A fire alarm system which is adapted to collect the fire occurrence signal), the Each of the fire detectors having a plurality of fire phenomenon detection units is a first fire phenomenon detection unit (FS21) of the fire phenomenon detection units.
First address setting means (DIP switch DIP for self address setting, ROM for storing self address, etc.)
And a related address setting means (step 302) for setting an address for the remaining fire phenomenon detection section (FS22, FS23) in association with the start address, and either the start address setting means or the related address setting means from the receiving section. When a fire information return command for any of the addresses set in is received, the fire monitoring information detected by the fire phenomenon detection unit corresponding to that address is transmitted to the reception unit (TR).
X21, step 306), and a fire alarm system are provided.

[Embodiment] An embodiment of the present invention will be described below. Prior to that, the operation of the present invention will be described with reference to FIG.

When the data of each fire phenomenon detector of a fire detector (hereinafter also referred to as a multi-element sensor) having a plurality of fire phenomenon detectors is sent to the receiver, the transmission format is one element sensor, that is, one fire phenomenon detector. Unless it is the same as the sensor having only one, the transmission system becomes very difficult when the one-element sensor and the multi-element sensor are mixed on the wiring.

Therefore, as many addresses as the number of types of fire phenomenon detection units included in the multi-element sensor in the system are assigned to each multi-element sensor. For example, as shown in FIG. 1, if the heat detection unit, photoelectric smoke detection unit, and gas detection unit are all three types of fire phenomenon detection units included in the multi-element sensor in the system, Three addresses are uniformly assigned to each multi-element sensor. As an example, as shown in FIG. 1, the heat detection unit is associated with the head address of the three addresses assigned to each multi-element sensor, and the smoke detection unit is associated with the second address. Then, the gas detector is made to correspond to the third address. That is, in FIG. 1, addresses 2, 3 and 4 are assigned to the multi-element sensor B, and a heat detection unit, a smoke detection unit, and a gas detection unit correspond to each address. Further, addresses 6, 7, and 8 are assigned to the multi-element sensor D having only the heat detection unit and the gas detection unit, and the heat detection unit and the gas detection unit correspond to the addresses 6 and 8, respectively. Since the address 7 is assumed to have no smoke detector, it is in an empty state.

In this case, only the head address is set in the address setting means such as a dip switch or ROM provided in each multi-element sensor, and the remaining two addresses are set by software or a program described in detail in the flowchart of FIG. I am trying to set it.

In such a system, the receiver RE side polls each address as usual, regardless of whether it is a multi-element sensor or a single-element sensor. On each multi-element sensor side, polling for its own address, that is, three addresses from the start address to the address obtained by adding 2 to the start address is performed by the receiver RE.
Then, the element corresponding to the address, that is, the sensor data of the fire phenomenon detection unit is sent.

By doing so, only one address setting switch on the hardware is required, and the size can be spatially reduced. Further, there is an advantage that the number of transmitters / receivers required for a large number of sensors is one.

FIG. 2 is a block circuit diagram showing a fire alarm system according to an embodiment of the present invention suitable for carrying out the present invention operatively described in FIG. 1, where RE is a receiver and SE ₁
～SE _N is a plurality of sensor or a fire detector which is connected to the receiver RE via the pair of power supply and signal line L. Although the internal circuit of the fire detector SE ₁ is shown in detail, the other fire detectors have the same circuit configuration.

In the receiver RE, MPU1 is a microprocessor, ROM1 is a storage area for the program of FIG. 4, ROM2 is a storage area that stores a table of sensor numbers and types corresponding to each sensor number, and ROM3 is for each type. Corresponding fire level, the storage area that stores the fire discrimination reference table, RAM1 is the work area, DP is the display section, OP is the operation section, TRX1 is the signal transmission / reception section, IF1 ~ IF3 is an interface.

In the fire detector SE ₁ , the MPU21 is a microprocessor, the ROM21 is a program storage area described in FIG. 3, the RAM21 is a work area, the RAM22 is a self-address setting storage area, and the FS21 is three. This is the first fire phenomenon detection section to which the first address of the two addresses is assigned. In this embodiment, for example, the thermal detection section includes a thermistor as a temperature sensing element.

The FS22 is a second fire phenomenon detection section to which a second address of the three addresses is assigned, and in this embodiment, it is a scattered light type smoke detection section.

The FS23 is a third fire phenomenon detection section to which a third address of the three addresses is assigned, and is a gas detection section in this embodiment.

AD21, AD22 and AD23 are the fire phenomenon detection unit FS2
1, DIP is an analog-to-digital converter that converts the sensor level from FS22 and FS23 into an analog amount that is digitally expressed. DIP is a dip for setting the start address assigned to the first fire phenomenon detector FS21.・ Switch, TRX21 is a signal transmitting / receiving unit, and IF21 to IF25 are interfaces.

FIG. 3 is a flow chart for explaining the operation of the fire detector having the plurality of fire phenomenon detection parts shown in FIG. 2, that is, the multi-element sensor. First, at the time of initial initialization, the interface IF25 is used. The contents of the DIP switch DIP in which the start address of the fire detector is set are read from and stored in the storage area RAM 22 for self address setting as AD (step 301). Next, an address AD + 1 obtained by incrementing the address AD by one address and an address AD + 2 obtained by incrementing the address AD by 2 are similarly stored in the storage area RAM 22
(Step 302).

When the above self-address setting operation is completed, the receiver
Waiting for a data return command from RE, and if there is a data return command (Y in step 303), it is judged whether or not the data return command is sent to its own fire detector ( Step 304). That is, the data return command, that is, the received data has a format as shown in the upper part of FIG. 3A. Therefore, the above determination is made by checking that the address in the received data is the address AD ... This is performed by determining whether or not it matches any one of AD + 2 (step 304).

If the address in the data return command is the self address AD
~ If any of AD + 2 matches (Y in step 304), read the sensor level of the fire phenomenon detection unit corresponding to the matched address in the fire phenomenon detection units FS21 to FS23 from the contents of the corresponding interface. Is stored in the work area RAM 21 as an SLV (step 305). Next, the interface I between the sensor level SLV and the address
It is written in F24 and sent out from the signal transmitting / receiving unit TRX21 (step 306). An example of the format of transmission data is shown in the lower part of FIG. 3A. When the transmission is completed (Y in step 307), the process returns to step 303 and waits for the next data return command.

FIG. 4 is a flow chart for explaining the operation of the receiver RE, in which the receiver RE sequentially polls from the _first fire detector SE ₁ to the Nth fire detector. The polling operation for the nth fire sensor SEn (1 ≦ n ≦ N) will be described. First, a data return command is sent to the nth sensor (step 403), and if there is a reply (Y in step 404), The data from the nth sensor is read and stored in the work area RAM1 as an SLV (step 405).

Next, the type of the n-th sensor is read from the storage area ROM2 and stored as KIND in the work area RAM1 in the same manner (step 406), and the type KIN from the storage area ROM3.
The operation level corresponding to D, that is, the fire determination standard is read and stored as LV in the work area (step 40).
7).

Finally, the sensor level SLV is compared with the operation level LV (step 408), and if the SLV is LV or higher, after an appropriate fire action such as displaying the sensor address, type and fire is taken (step 408). 409), and if SLV is less than LV, then go to poll the next fire detector via step 410.

In the above embodiment, the fire detector is an analog fire detector that sends out a physical quantity signal of the detected fire phenomenon, and the fire is discriminated by the physical quantity signal sent from the analog fire detector at a receiver or a repeater. The case where the present invention is applied to a so-called analog type fire alarm system for performing the above has been described. However, a normal digital system in which a fire detector determines a fire and sends a fire signal and / or an address signal to a receiver is described. It is also possible to apply the present invention to a fire alarm system of an on / off type, and in that case, a ROM storing an operation level, that is, a fire determination standard will be added to each fire detector. .

In addition, when the present invention is applied to such a normal digital fire alarm system, it is judged as a fire by comparing the sensor level and the fire judgment standard for each element included in the multi-element sensor. In addition to sending the judgment result to the receiver RE, the fire judgment is made based on all or some of the elements included in the multi-element sensor, and the judgment result is sent to the receiver RE. It is also possible to do so. In this case, an extra address is allocated to the multi-element sensor, and when a data return command for that address is received from the receiver RE, the determination result based on the plural elements is transmitted.

[Effects of the Invention] As described above, according to the present invention, in a system in which a fire detector having a plurality of fire phenomenon detection units, a so-called multi-element sensor, is connected to a reception unit such as a receiver or a repeater, the reception unit is the same as the conventional one. It is possible to collect data from each fire phenomenon detection unit in a transmission format, and there is an effect that each multi-element sensor does not require a large installation area for address setting means.

[Brief description of the drawings]

FIG. 1 is a system diagram for explaining the method of the present invention, and FIG.
FIG. 3 is a block circuit diagram showing a fire alarm system according to an embodiment of the present invention, FIG. 3 is a flow chart for explaining the operation of the multi-element sensor shown in FIG. 1 or 2, and FIG. 3A. Shows the format of transmission data, 4th
The figure is a flow chart for explaining the operation of the receiver RE shown in FIG. 1 or 2. In the figure,
RE is a receiver, SE _1- SE _N are sensors or fire detectors, MP
U1 is a microprocessor, ROM1 is a program storage area in FIG. 4, ROM2 is a sensor number / type table storage area,
ROM3 is a type / fire discrimination reference table storage area, RAM1 is a work area, MPU21 is a microprocessor, ROM21 is a program storage area of FIG. 3, RAM21 is a work area, RAM22 is a self-address setting storage area, and FS21 is The first fire phenomenon detection unit, FS22 is the second fire phenomenon detection unit, FS23 is the third fire phenomenon detection unit, DIP is a dip switch for setting the start address, that is, the start address setting means, TRX21
Is a signal transmitting / receiving unit.

Claims (1)

(57) [Claims] A fire detector having a plurality of fire phenomenon detectors is connected to a receiver, and the receiver collects fire monitoring information such as an analog quantity signal or a fire signal from the fire detector by polling. In the notification facility, each of the fire detectors having the plurality of fire phenomenon detection units has a head address setting unit for the first fire phenomenon detection unit of the fire phenomenon detection units and a remaining fire phenomenon detection unit. A related address setting means for setting an address in relation to the head address, and a fire information return command for any address set by either the head address setting means or the related address setting means from the receiving section. Sometimes, sending means for sending to the receiving unit the fire monitoring information detected by the fire phenomenon detecting unit corresponding to the address, Fire alarm system, characterized in that it includes.