JPH0652458A - Fire monitor system - Google Patents

Abstract

PURPOSE:To requires only one kind of table required on a receiver side even when a different kind of sensor is connected by normalizing information from the sensor. CONSTITUTION:When the monitor distance of the sensor S1 is set, the signal from the dip switches of a distance setting part 13 is received by a central arithmetic processor 10. This central arithmetic processor 10 normalizes a pattern of smoke density (dimming rate) corresponding to a distance into the pattern of the smoke sensor. The analog information generated by the detection and normalization of the smoke sensor S1 is sent back to the receiver. On the receiver side, on the other hand, analog information from any sensor is already normalized, so only one kind of table is required. Namely, the memory on the receiver side can be saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire monitoring system using a dimming type photoelectric separation type sensor.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional fire monitoring system, in which a signal line 2 extends from a receiver 1 and a sensor S is connected to the signal line 2. This sensor S
Is a dimming photoelectric separation type sensor, in which the light emitting part and the light receiving part are installed facing each other with a distance, and the amount of light received decreases when smoke enters between them, and the degree of this decrease is analogized. It is what is output. Then, a signal is transmitted and received between the sensor S and the receiver 1 by, for example, time division multiplex transmission, and the analog signal from the sensor S is received by the receiver 1 side. Depending on the degree of the analog value, the forecast level, the fire level, etc. Judgment is made based on the level and the interlocking news level, and a fire is notified.

Further, this dimming type photoelectric separation type sensor S is used.
The DIP switch can set four types of distances according to the degree of the monitoring distance. For example, as shown in FIG. 6, 5 to less than 10 m, 10 to 25 m
Less than 25 to less than 50 m and less than 50 to less than 100 m according to the monitoring distance. A long monitoring distance results in a fire level with a high extinction rate, and a short monitoring distance results in a fire level with a low extinction rate.

On the receiver 1 side, four types of conversion tables are prepared according to the distance setting of the sensor S. FIG. 6 shows these conversion tables. The number of analog stages is 63 according to the output level of the sensor S, and the extinction ratio (% /
m) is set, and the value at that time is associated with the number of analog stages, and the receiver 1 judges a fire. FIG. 6A shows
The distance is 5 to less than 10 m, and the extinction rate at that time is 40. (b) is the case that the distance is less than 10 to 25 m and the extinction rate at that time is 50. Also, FIG. 6 (c)
Shows the case where the distance is 25 to less than 50 m and the extinction rate at that time is 70, and (d) shows the case where the distance is less than 50 to 100 m and the extinction rate at that time is 100.

[0005]

In such a conventional example, one of the patterns shown in FIGS. 6A to 6D is used in order to set four kinds of monitoring distances of the sensor S for each installed sensor S. Has to be selected, and in the graph display on the receiver 1 side, there is a problem that it is difficult to grasp how much the fire progress is at a value of 30% / m depending on the distance.

The present invention has been provided in view of the above points, and normalizes the information output from the sensor, so that even if different types of sensors are connected, it is necessary for the receiver side. The present invention provides a fire monitoring system for the purpose of using only one type of table.

[0007]

According to the present invention, a plurality of different types of sensors are connected to a signal line extended from a receiver, and a signal detected by the sensor is returned to the receiver as analog information. In a fire monitoring system in which a receiver determines a fire based on the analog information, the detector is provided with a normalizing means for normalizing an output pattern of a sensor of a certain type to an output pattern of a sensor of another type. It is a thing.

[0008]

Thus, the analog information output from the sensor can be unified into one, and only one table on the receiver side, which has conventionally required a large number of conversion tables, is required, and the memory of the receiver can be saved. Even if smoke detectors with different methods are developed in the future, it is not necessary to develop software in the system.Therefore, it will be installed as additional work in the fire alarm system installed in the building at the site. Becomes easier,
Useless capital investment becomes unnecessary. In addition, from the detector on the receiver side to the matrix setting table such as smoke prevention equipment equipment,
There is no need to bother with the idea of separation type or spot type. Furthermore, there is no need to re-register data for changes in the security zone (distance change) for the delivered property.
By taking the expression of "fire accuracy (confidence)", the information can be easily transmitted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a system configuration diagram similar to the conventional one, in which the same dimming type photoelectric separation type sensor S as the conventional one is connected to the signal line 2.
₁ and a plurality of general photoelectric spot type smoke detectors S ₂ are connected. The sensors S ₁ and S ₂ may have a repeater in the middle of the signal line 2.

[0010] in standard smoke detector S ₂ analog information is transmitted in a time division multiplex transmission and the like to the receiver 1, The analog information from the sensor S ₁ is transmitted to the receiver 1. In the present invention, the analog information output from the sensor S ₁ is normalized so that the receiver 1 can make the same determination as the general smoke sensor S ₂ . When the monitoring distance of the sensor S ₁ is set, a distance state is given to a CPU (central processing unit) inside the sensor S _{1 by} means of a DIP switch or the like for distance setting, and sensing is performed based on this information. Normalization calculation is performed inside the device S ₁ , and the detected signal is normalized to the receiver 1 or the repeater, and analog information is returned.

FIG. 3 shows a spot type smoke detector S.
₂And a dimming type photoelectric separation type sensor S₁4 types of monitoring distance
The relationship between the number of analog stages and smoke density is shown according to the separation.
Sensor S ₁No matter what the setting distance of
A sensor S with an electro-separated pattern₂Normalized to
To do. Therefore, on the receiver 1 side,
Since even the analog information of is normalized,
You only need to have one type of table. That is, the receiver
It is possible to save memory on the one side.

FIG. 1 shows a block diagram of the sensor S ₁ .
The main body of the sensor S ₁ has a central processing unit 10, a light emitting unit 11, a distance setting unit 13, a storage device 14, a transmission interface 15 and the like, which constitute a normalizing means, and the light emitting unit 11 A light receiving unit 12 that receives light is provided.
The signal from the dip switch of the distance setting unit 13 receives the central processing unit 10, and the central processing unit 10 normalizes the pattern of smoke density (extinction rate) according to the distance to the pattern of the smoke sensor S ₂ . To do. It should be noted that the distance setting unit 13 can perform fine (5 m to 100 m) normalization calculation by using the function of the start distance measurement method. This reduces false alarms.

The storage device 14 is a place for storing a normalization coefficient or a calculation formula according to the distance. FIG. 4 shows a graph representing the temporal transition of analog information on the receiver 1 side. Then, on the side of the receiver 1, the criterion of "fire certainty (confidence)" based on the absolute numerical analog stage number is applied.

[0014]

As described above, according to the present invention, a plurality of types of different sensors are connected to the signal line extended from the receiver.
In a fire monitoring system, in which a signal detected by a sensor is returned to a receiver as analog information, and the receiver side determines a fire based on the analog information, in the output pattern of one type of sensor, another type of sensor is used. Since the sensor is provided with a normalizing means for normalizing the output pattern of, the analog information output from the sensor can be unified,
Conventionally, only one conversion table was needed, which required a large number of conversion tables, and it was possible to save receiver memory. In addition, even if smoke detectors with different methods were developed in the future, the system No need to develop software at the site, which makes it easier to install it in the fire alarm system installed in the building at the site with additional work, and unnecessary use of capital investment. Further, there is no need to bother the sensor on the receiver side in the matrix setting table such as the smoke proof equipment or the smoke control equipment so as to be aware of the separation type or the spot type. Furthermore,
For the change of the warning area (distance change) for the delivered property,
It is not necessary to re-register the data, and the expression of "fire certainty (confidence)" has the effect of providing easy-to-understand information transmission.

[Brief description of drawings]

FIG. 1 is a block diagram of a sensor according to an embodiment of the present invention.

FIG. 2 is an overall system configuration diagram of the above.

FIG. 3 is a diagram showing the relationship between the number of analog stages and smoke density in the above.

FIG. 4 is a diagram showing a graph representing temporal transition of analog information of the above.

FIG. 5 is a system configuration diagram of a conventional example.

FIG. 6 is an explanatory diagram showing a conversion table on the receiver side of a conventional example.

[Explanation of symbols]

1 receiver 2 signal line S ₁ sensor S ₂ sensor

Claims (1)

[Claims] 1. A plurality of different types of sensors are connected to a signal line extended from a receiver, the signal detected by the sensors is returned to the receiver as analog information, and the receiver side converts the analog information into the analog information. In a fire monitoring system for determining a fire based on the fire monitoring, the sensor is provided with a normalizing means for normalizing an output pattern of a certain type of sensor to an output pattern of another type of sensor. system.