JPH01173195A - Fire alarm facility - Google Patents

Abstract

PURPOSE:To shorten time for transmitting information, which indicates to which set level the detected quantity of a fire phenomenon belongs, and to decrease the possibility of an erroneous connection by sending the information by including the information in digitized analog quantity information to indicate the detected quantity. CONSTITUTION:When fire sensors SE1-SEk send analog quantity signals to a receiving means RE, the fire sensors SE1-SEk use specific bits b5 and b6 out of plural bits b1-b6 to show analog quantity as one part of bits to indicate the analog quantity. Further, the fire sensors also use the specific bits as the bits to indicate the detected quantity of the fire phenomenon to be sent, namely, the bits to indicate to which set level (for example, a first-class sensitivity level, a second-class sensitivity level, a third-class sensitivity level, etc.,) the analog quantity belongs, unify the analog quantity information and set level information, and send the unified information. Thus, it can be unnecessary to increase the bits and signal lines in order to send the set level information.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to fire alarm equipment, and in particular, to fire alarm equipment,
The present invention relates to fire alarm equipment that improves the manner in which signals are transmitted to receiving means such as receivers and repeaters for monitoring fires.

[Prior art and its problems] Fire detectors for analog systems transmit the detected amount of smoke and heat to the receiver as analog information, but analog information is defined separately by the Fire Service Act. In some cases, it may be required to also transmit information regarding the setting level of a normal fire detector, such as type 1 or type 2, that is, a fire signal. For this reason, traditionally, a separate dedicated line was drawn,
In addition to the bits representing analog data, an identification bit representing the fire judgment result was provided exclusively to transmit the set level information, that is, the fire signal.
The present invention provides a fire alarm system that does not require any of these additions and is capable of transmitting fire judgment results at the 1st, 2nd, and 3rd level.

[Means for Solving the Problems] Therefore, according to the present invention, when transmitting information regarding the analog quantity of a fire phenomenon detected by a fire detector to a receiving means such as a receiver or a repeater, the information is transmitted together with the analog quantity information. The analog quantity has at least one preset level (
For example, in a system that transmits setting level information indicating any of 111 sensitivity levels, 2 types of sensitivity levels, 3 types of sensitivity levels, etc. (hereinafter simply referred to as setting levels), the analog quantity information By cleverly incorporating setting level information into the signal and transmitting it, the signal line can be transmitted without increasing the number of signal lines or the number of bits.
A fire alarm system is provided that is capable of transmitting setting level information.

Specifically, according to the present invention, an analog fire detector (
The senna level of the analog information on fire phenomena detected by the SE I-8E
In a fire alarm system that transmits a binary code to a receiving means such as a fire detector or a repeater, the fire detector has a sensor level that is set to at least one set level (A).
, B, C), set information corresponding to the nearest setting level reached in the first code part (bs, bs) of the binary code to be sent out, and first means (ROM 13, step 405) for setting the difference between the nearest set level at which the sensor level has reached and the current sensor level in a second code portion (bt~b<) of the binary code; ~40
9. Steps 412 to 417), the receiving means includes a first code portion for determining and displaying the setting level based on the first code portion of the binary code transmitted from the fire detector. 2 (steps 506, 507.
509 to 512), and a third code that determines the sensor level based on the first and second code portions of the binary code transmitted from the fire detector, processes the signal, and uses it for condition analysis. (step 514);
Provided is a fire alarm system characterized by being provided with.

[Function] The fire detector converts the analog quantity information of the fire phenomenon detected by the fire phenomenon detection unit (FS) into multiple bits (bt to b@), as shown in Figure 3 below. It is sent as a binary code to a receiving means such as a receiver (RE) or a repeater.

The receiving means determines the scale of the fire and/or changes in the fire based on the analog quantity information received from the fire detectors (SE+ to 5EX).

When a fire detector sends an analog quantity signal to a receiving means, it converts specific bits (bs, b,) among a plurality of bits (b+ to bi) representing analog I into part of the bits indicating the analog quantity. It can also be used as a bit to indicate which setting level (for example, type 1 sensitivity level, type 2 sensitivity level, type 3 sensitivity level, etc.) the fire phenomenon detection unit, that is, the analog quantity to send out, is at. , the analog quantity information and setting level information are sent out together.

By doing this, setting level information indicating which setting level the detected amount of fire phenomenon belongs to can be included in the digitized analog amount information indicating the detected amount and being transmitted. Increasing the number of bits to transmit level information (the disadvantage is that it takes time to transmit information), increasing the number of signal lines (the number of lines increases significantly, increasing the number of incorrect connections, and increasing the number of signal lines for fire detectors and receivers. The disadvantage is that the configuration becomes complicated and signal processing becomes troublesome).

In addition, on the receiver (or repeater) side, by determining the signal state of specific bits of the analog quantity information received from the fire detector, it is possible to determine which setting level the received analog quantity belongs to. without extensive signal processing.
Can be easily identified.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block circuit diagram showing a fire alarm system for explaining the present invention in detail. In the figure, RE is a receiver, and SE to SEK are analog fire detectors.

In the analog fire detectors SE, ~SEK, MPU1 is a microprocessor, ROM11 is a read-only memory for program storage, which will be described later in FIG. 4, ROM12 is a read-only memory for storing self-addresses, and ROM13 is , read-only memory for storage of configuration levels A, B, and C; RAMII is working random access memory, part of which is also used as register D; FS is for heat, smoke,
Fire detection unit, amplifier, which detects fire phenomena such as light, gas, etc.
A fire phenomenon detection section having a sample and hold circuit etc.; AD is an analog-to-digital (A/D) converter that converts an analog signal of a fire phenomenon outputted from the fire phenomenon detection section FS into an analog quantity signal of a digital signal; TR-Xl is a transmitting/receiving section that includes a parallel-to-serial converter, a transmitting circuit, a receiving circuit, a serial-to-parallel converter, and the like.

Further, in the receiver RE, MPU2 is a microprocessor, ROM21 is a read-only memory for storing programs to be described later in FIG. 5, and ROM22 is an analog fire detector S E t to SE
RAM 21 is a read-only memory for an address map that stores each address and the corresponding fire warning area, etc. RAM 21 is a working random access memory, RAM 22 is an analog fire detector S E + ~ S.E.
A random access memory for storing the analog quantity signal received from K, TRX2 is a transmitting/receiving section similar to TRX1, DP is a display section, and op is an operation section.

FIG. 2 is a graph for explaining the present invention in detail. In the figure, the horizontal axis shows the physical quantity of temperature or smoke concentration (smoke concentration in this example), and the vertical axis shows the physical quantity of temperature or smoke concentration. shows an analog sensor level corresponding to the smoke density detected by the fire phenomenon detection unit FS. The operating level of smoke detectors installed in computer machine rooms, etc., the so-called type 1 operating level (smoke concentration 5% or more), is the sensor level setting level A, and smoke detectors installed in general buildings, etc. The operating level of the smoke detector, the so-called type 2 operating level (smoke concentration 10%), is set as the sensor level setting level B, and the operating level of the smoke detector, the so-called 3rd type operating level, at which the fire door, smoke exhaust damper, etc. should be operated in conjunction Seed operation level (smoke concentration 15%
) is the set level C of the sensor level, and when each fire detector detects the set level A, 13 or C, it sends information about the detected set level to the receiver RE in addition to sending out the analog quantity. must be sent.

FIG. 3 specifically shows the relationship shown in FIG. 2 by replacing it with a binary code, taking smoke as an example.

Although FIG. 3 shows analog quantities of 6 bits from bl to b6, that is, a maximum of 63 levels, this is just an example, and the number of bits to be adopted can be varied as necessary. In Fig. 3, the sensor level when the smoke concentration reaches the operating level of one type, that is, the set level A, is set to 16, and that the sensor level reaches the set level A is expressed as a binary code, that is, analog data. The receiver side is notified by setting bit b5 and transmitting it. In addition, the sensor level is set to 32 when the smoke concentration reaches the two operating levels, that is, the set level B, and when the sensor level reaches the set level B, a bit is set at the bottom of the analog data and sent. This will notify the receiver side. Finally, the sensor level when the smoke concentration reaches the three operating levels, that is, the set level C, is set to 48, and the fact that the sensor level has reached the set level C is determined by the analog data S, S, and S. The receiver side is notified by setting bits on both sides and sending it out. In this way, information regarding one, two, or three types of operation levels is informed to the receiver side by the first code portion of the analog data S and b6. Setting levels A and B are identified by single bits of S and S, respectively, while setting level C is identified by an AND condition for both.

The analog quantity of the sensor level is signaled to the receiver side using all bits b, to b6. In other words, if no bit is set in the first code part, the smoke density is 0.
~5%, and the smoke density within this 5% range is represented by a binary code according to the second code section, i.e. b+~b. If the bit is set in bs, the smoke density is within the 5% range of 5 to 10%, and the smoke density within this 5% range is similarly represented by the second code part, which is in addition to the first code part. By adding or summing the code portions, the entire analog quantity is represented.

Similarly, analog quantities can be represented by all bits b, .about.b, and sent to the receiver side.

On the receiver side, the set level is identified by determining bits b and b, that is, the first code portion, and the analog quantity is identified by determining all of the first and second code portions. be able to.

Hereinafter, the operation of the fire alarm equipment shown in FIG. 1 will be explained using FIGS. 4 and 5. FIG. 4 is a flowchart of the analog fire detector program, and FIG. 5 is a flowchart of the receiver program.

In FIG. 4, following the initial setting (step 401), there are received signals from receivers R and E (step 402: YES), and by comparing them with the own address stored in the ROM 12, the If it is confirmed that the address matches (YES in step 403)
Next, the detection output from the fire phenomenon detection section FS is read and converted into digital information by the A/D converter AD.

Next, the digital information obtained from the A/D converter AD is stored in the register D of the working RAM II (step 404), and then taken out from the register D and stored in the setting level storage ROM 13. Setting level A, B
and C (steps 405, 406 and 40
7) In this embodiment, the stored contents of the ROM 13 are the same as the table shown in FIG. 3, and the sensor levels in FIG. 3 correspond to the digital information obtained from the A/D converter AD. There is.

Therefore, if the digital information stored in the register D, that is, the sensor level, is smaller than the sensor level 16 set as the setting level A in the ROM 13 (No in step 405), bit b of the first code portion,
and and are both set to 0 (step 408),
Next, it is determined which of sensor levels 1 to 15 the contents of register D are at (step 409), and the bits of b1 to b corresponding to the determination result are set by
Step 410), send the status information of b, -b, (
Step 411).

If the digital information stored in register D, that is, the sensor level, is between sensor levels 16 to 31 set as setting level A in ROMt 3 (YES in step 405 and No in step 406),
Bits b and s of the first code part each have 1
and 0 are set (step 412), and then register D
It is determined which of the sensor levels 16 to 31 the content of is located at (step 413), and the bits of i, ~b, corresponding to the determination result are set (step 410).
) Status information is sent (step 411).

If the digital information, that is, the sensor level stored in the register D is between sensor levels 32 to 47 set as the setting level B in the ROM 13 (YES in step 406 and No in step 407), the first Bits b and b6 of the code portion are set to 0 and 1, respectively (step 414), then it is determined which of sensor levels 32 to 47 the contents of register D are in (step 415), and The bits b1 to b corresponding to the determination result are set (step 410).
Status information is sent (step 411).

If the digital information stored in register D, that is, the sensor level, is between sensor levels 48 to 63 set as setting level C in ROM 13 (YES in step 407), bit b of the first code portion ,
and b@ are both set to 1 (step 416),
Next, it is determined which of sensor levels 48 to 63 the contents of register D are at (step 417), and bits b1 to b4 corresponding to the determination result are set (
Step 410), status information is sent (Step 4
11).

In the operation of the receiver shown in FIG. 5, following initialization (step 501), sensors numbered 1 through 2 are polled in order.

A call is made to the k (1≦≦K) analog fire detector (step 503), and when state information, which is analog quantity data, is received from the sensor (step 504), the The analog quantity data is stored in the memory location corresponding to the number sensor of the analog quantity signal storage RAM 22 (step 505).

Next, b5 of the analog quantity data stored in the RAM 22
Each setting level is determined based on the and b6 bits. First, if it is determined that both bits b and s are O (No in step 506 and
07 No), there is no abnormality, so nothing is done and the next (
The process proceeds to the k+1)th fire detector (step 508).

b. If it is determined that only the bit is 1 (YES in step 506 and NO in step 509), display that the kth sensor is at fire level A (step 510), and display the next number. (step 508)
, b, if it is determined that only the bit is 1 (NO in step 506 and YES in step 507), it is displayed that the kth sensor is at fire level B (step 51).
1), go to the next numbered sensor (step 508), and finally, if both b and b6 bits are determined to be 1 (YES in step 506 and Y in step 509)
ES), displays that the kth sensor is at fire level C (step 512), and moves to the next numbered sensor (step 508).

When the determination for all the numbered sensors is completed in this way (YES in step 513), the analog ruin data of each sensor in the analog quantity signal storage RAM 22 is analyzed and the analysis results, such as the scale of the fire and the direction of progress, are analyzed. (step 514), and then returns to the first sensor and repeats the same polling from the beginning (step 502).
.

In the above embodiment, the first and second code portions of each detection output of the analog-to-digital converter are set using a predetermined table or comparison table in the ROM 13. However, various other methods can be used as such setting methods.

For example, if the sensor level has reached at least one set level, setting the first code part of the binary code to be sent out with information corresponding to the closest set level reached; and The difference between the current sensor level and the nearest set level reached by the sensor level is calculated and the second level of the binary code is
You may also set it in the code section.

[Effects of the Invention] As described above, according to the present invention, information indicating to which setting level the detected amount of fire phenomenon belongs is included in the digitized analog amount information indicating the detection unit and transmitted. Since it is configured so that it is possible to transmit setting level information, there is no need to increase the number of dedicated bits or increase the number of signal lines.This reduces information transmission time and reduces the possibility of incorrect connections. This has the effect that the sensor and receiver configurations can be simplified, and signal processing can also be simplified.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram for explaining a fire alarm system according to an embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining the operation of FIG. 1, and FIGS. The figure shows the first
In Figure 0, which is a flowchart for explaining the operation of Figure 0, SE, ~SE are analog fire detectors, FS
is a fire phenomenon detection unit, ROM12 is a read-only memory for storing self-addresses, ROM13 is a read-only memory for storing setting levels, RE is a receiver, ROM22 is a read-only memory for address maps, RAM2
2 is a random access memory for storing analog quantity signals, DP is a display section, and OP is an operation section. Akira 2 figure vagueness degree ('/,) □ 4th ward

Claims (2)

[Claims] (1) In a fire alarm system in which a sensor level of analog information of a fire phenomenon detected by an analog fire detector is sent in binary code to a receiving means for fire monitoring, the fire detector includes: , if the sensor level has reached at least one set level, setting information corresponding to the nearest set level reached in a first code part of the binary code to be sent; , first means for setting a second code portion of the binary code to the difference between the nearest set level that the sensor level has reached and the current sensor level; a second means for determining and displaying the setting level based on the first code portion of the binary code transmitted from the fire detector; - A fire alarm system comprising: a third means for determining the sensor level based on the first and second code portions of the code, processing the signal, and using it for fire determination. (2) The first means provided in the fire detector includes:
2. The fire alarm equipment according to claim 1, further comprising storage means storing a comparison table between the sensor level sensed by the fire detector and the binary code.