JP2858266B2 - Fire alarm system with alarm level switching function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fire alarm system having an alarm level switching function. More specifically, a fire alarm level on a repeater side can be attached to a sensor. The present invention relates to a device characterized in that switching can be performed by a switching control signal interlocked with lighting of a place, air conditioning equipment, or the like.

[Prior Art] A conventional fire alarm system connects a fire receiver and a plurality of repeaters with multiple signal lines, derives a sensor line from each repeater, and connects a large number of detector lines to the sensor line. It is configured by connecting a sensor.

Then, a monitoring signal based on a multiplex signal is sequentially transmitted from the repeater side to each sensor by polling access, and a return signal including a detection signal returned from each sensor is received, and a determination of an alert is sequentially performed. Is transmitted to the receiver side to perform necessary processing such as alarm notification.

By the way, for example, in a place such as a kitchen where the ambient temperature of the detector is high because the fire is used during the day, but the ambient temperature of the sensor is low compared to the daytime because the fire is not used at night. If the repeater side sets a high alert discrimination level in advance so as not to be alerted by the ambient temperature during the day,
When a fire occurs at night, the alarm is delayed because the alarm determination level is set high, and conversely, if the alarm determination level is set low to detect night fire early. However, an erroneous alarm is generated due to an increase in the ambient temperature in the daytime, which lowers the reliability of the system.

[Problems to be Solved by the Invention] The present invention proposed in view of the above-mentioned circumstances automatically sets the alarm discrimination level on the repeater side by a switching control signal interlocked with the lighting at the installation location of each sensor, air conditioning equipment, and the like. It is an object of the present invention to provide a fire alarm system having an alarm level switching function capable of performing detailed monitoring according to the situation of an installation place by setting a switching operation.

[Means for Solving the Problems] According to the present invention according to claim 1 proposed to achieve the above object, a fire receiver transmits and receives data by a multiplex signal to and from a repeater. A multiplex transmission control unit for
For each sensor connected to the sensor line derived from the repeater, at least two or more sets of the forecast, fire report, and interlock report for each connected line number, sensor address, and sensor type Sensor information setting means for setting and inputting sensor information including a level, memory means for storing at least the sensor information set by the sensor information setting means, and transmission via each repeater Alarm notifying means for receiving at least the alarm discrimination result data of each of the sensors to perform alarm display and sounding of an alarm sound, and performing signal processing of each section, and storing the memory in the memory means when the system is started. A signal processing circuit for sequentially transmitting the obtained sensor information to the repeater side by a multiplexed signal with a repeater address via the multiplex transmission control unit, and thereafter monitoring the alerting state of each sensor; and To Eteori, repeaters, transmission of data by multiple signals between said receiver, a multiplex transmission control unit for performing reception, and an address setting portion for setting a repeater-specific repeater address,
Multiplexing between an I / O port for receiving a switching control signal for switching the alert determination level of a sensor and a plurality of sensors provided for each sensor line and connected to each sensor line A sensor line multiplex transmission control unit for transmitting and receiving data by a signal, and at the time of starting up the system, among the sensor information stored in the memory means on the receiver side, a derived sensor line. A system memory for sequentially acquiring and storing information corresponding to the connected sensors, and temporarily storing at least alarm determination result data obtained by determining a return signal returned from each sensor. And a monitoring signal provided for each sensor line, for monitoring the alerting state of the sensor connected to each sensor line, and via the sensor line multiplex transmission control unit. Depending on the multiplex signal A visual signal is sequentially output to each sensor by polling, and a sensor line signal processing circuit that receives and decodes a return signal by a multiplex signal returned from these sensors, and a sensor information signal storage circuit stored in the system memory. A polling signal having at least a line number and a sensor address is sequentially transmitted to the sensor side by polling through the sensor line signal processing circuit, and then a temperature detection signal or smoke temperature detection returned from the sensor side is performed. A response signal including the signal is received, and the temperature detection signal or the smoke concentration detection signal included in the response signal, and the above-mentioned I among the respective discrimination levels of the forecast, fire report, and link report stored in the system memory. The alert status is determined by comparing the alert determination level switched according to the switching control signal input to the / O port, and the determination is made. After the alarm determination result data is stored in the temporary memory, and the polling of each sensor is monitored in this way, the alarm determination result data of each sensor stored in the temporary memory is stored in the multiplexed signal. And a signal processing circuit for repeating the operation of transmitting the signal to the receiver via a line.

In this system, the alert level can be switched by manually switching the switching control signal. However, if the control signal output in conjunction with the driving of the exit / exit management system and the air conditioner is used as the switching control signal, The alert discrimination level is automatically switched in conjunction with the driving states of these systems and devices.

Further, in the present system, the signal processing circuit of the repeater determines the alert of the sensor. However, when the system is started, the sensor line corresponding to the sensor information stored in the system memory is used. It is also possible to preliminarily transfer and store the data in a transmission memory, and to perform the determination of the alert of the sensor in each sensor line signal processing circuit in a distributed manner. Can be reduced.

According to a second aspect of the present invention, in the configuration according to the first aspect, the repeater further includes timing means for outputting a predetermined switching control signal every predetermined time. The switching determination signal output from the timing means is applied to the I / O port to automatically switch the alert determination level.

According to a third aspect of the present invention, in the configuration of the first aspect, the I / O port provided on the repeater side is removed, and instead, the fire receiver inputs a switching control signal. When a switching control signal is input to the I / O port, the signal processing circuit performs signal processing according to the sensor information stored in the memory means. A switching control signal is output by a multiplex signal to a relay connected to a sensor for switching the alarm determination level via the multiplex transmission control unit, and the relay controls the multiplex transmission signal. The signal processing circuit receives and decodes the signal via the control unit to switch the alert determination level.

According to a fourth aspect of the present invention, in the configuration according to the third aspect, the fire receiver further includes a timing unit that outputs a predetermined switching control signal at a predetermined time interval. The alarm determination level is automatically switched by adding a switching control signal output from the timing unit to the I / O port.

According to a fifth aspect of the present invention, the switching control signal is constituted by a signal based on a control signal output according to a control state of an access control system, an air conditioner, an electric lock system, or the like.

[Operation] According to the first aspect of the present invention, for each sensor connected to the sensor line derived from the repeater, a circuit number to be connected, a sensor address, a type of the sensor, and at least two Detector information such as each of the discrimination levels of forecasts, fire reports and interlocking reports of more than a set is set and input by the sensor information setting means of the receiver, and the set sensor information is transmitted through a signal processing circuit. Stored in the memory means. When the system is activated, each sensor information stored in the memory means is appended with the repeater address of the repeater to which the sensor is connected, and each repeater is multiplexed through a multiplex transmission control unit. To be transmitted. Each repeater receives and decodes the sensor information via the multiplex transmission control unit, sequentially stores sensor information having the same address as the repeater address set in the address setting unit in the system memory, When the sensor information is transferred to the system memory of each repeater, the mode of monitoring the alert status of each sensor is entered.

In the monitoring mode, the repeater side sequentially outputs at least a monitor signal with a line number and a sensor address to a corresponding sensor line signal processing circuit, and the sensor line signal processing circuit corresponding to the line number outputs the monitoring signal. The monitoring signal is sequentially output to each sensor by a multiplex signal through the sensor line multiplex transmission control unit. In each sensor, if the sensor address assigned to the multiplex signal matches the address set on the sensor side, a temperature detection signal corresponding to the ambient temperature or a smoke density detection signal corresponding to the surrounding smoke density is generated. The reply signal with the sensor address is returned to the repeater, and the repeater receives and decodes the reply signal by the sensor line signal processing circuit via the sensor line multiplex transmission control unit. Is returned to the signal processing circuit. In the signal processing circuit, I / Os are selected from among multiple sets of alarm determination levels stored in the system memory.
Selectively set the alarm discrimination level according to the switching control signal input to the port, and compare the alarm detection level or smoke density detection signal of the return signal with the set alarm discrimination level to generate an alarm. The notification is determined, and the notification determination result data is sequentially stored in the temporary memory. In this way, when the alarm determination result data is transmitted from each sensor line signal processing circuit to the signal processing circuit, the signal processing circuit
The alarm determination result data stored in the temporary memory is transmitted to the receiver via a multiplex signal line, and the receiver stores the alarm determination result data in the memory means by a signal processing circuit and performs necessary signal processing. Then, the alarm notification means is driven to perform necessary alarm display and alarm notification.

According to the second aspect of the present invention, according to the switching control signal output from the timer means on the repeater side and transmitted to the signal processing circuit via the I / O port, the signal processing circuit specifies a designated sensor. Is selectively switched and set from among a plurality of sets of alert determination levels stored in the system memory. This timing means outputs a predetermined switching control signal every predetermined time. For example, by outputting different switching control signals between daytime and nighttime, the alarm determination level of the sensor is automatically switched. Can be set.

According to the third aspect of the present invention, the switching control signal is input to the signal processing circuit on the receiver side via the I / O port provided on the receiver side in place of the repeater. Then, by processing the sensor information and the switching control signal stored in the memory means, a relay connected to the sensor for switching the alarm discrimination level and the alarm discrimination level are obtained, and these data are obtained. The switch control signal with the repeater address is transmitted to the repeater side by the multiplex signal via the multiplex transmission control unit, and the repeater having the same repeater address receives and decodes the switch control signal by the signal processing circuit. And selectively sets the alarm discrimination level of the designated sensor from among a plurality of sets of alarm discrimination levels stored in the system memory.

According to the present invention as set forth in claim 4, since the clocking means is provided on the receiver side, when the switching control signal is input to the signal processing circuit via the I / O port on the receiver side, the signal processing circuit The switching control signal is transmitted to the repeater by the same operation as that described in claim 3 to switch the alert determination level.

According to the fifth aspect of the present invention, the switching control signal is a signal based on a control signal output according to a control state of another system or device such as an exit management system, an air conditioner or an electric lock system. Therefore, the alarm determination level on the repeater side is automatically switched and set in conjunction with the operation and stoppage of these systems and devices.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic configuration of a fire alarm system according to the present invention. In the figure, reference numeral 1 denotes a fire receiver, 2... Repeaters, and these fire receiver 1 and each relay 2. It is cross-connected by a multiplex signal line l. A plurality of sensor lines lS are derived from each repeater 2. A plurality of analog sensors 3 are connected to these sensor lines lS. The switching control signal for switching the alarm determination level is applied via a control signal line IC. A terminating resistor R is connected to the terminating end of the sensor line lS. By passing a predetermined current through the terminating resistor R, the sensor line multiplexing transmission control unit of the repeater 2, which will be described later, performs sensing. This enables disconnection detection of the equipment line lS.

FIG. 2 is a block diagram showing the internal configuration of the fire receiver 1 used in the system of the present invention. In the figure, reference numeral 11 denotes transmission and reception of data by a multiplex signal with the repeater 2. A multiplex transmission control unit 12 for performing, for each sensor 3 connected to the sensor line lS derived from the repeater 2, a connected line number, a sensor address, a sensor type, at least two sets or more. Sensor information setting means for setting and inputting sensor information such as a forecast discrimination level, a fire report, and an interlocking report, and a test reference signal attached to a test signal in a test mode described later; Information setting means
A memory means for storing at least the sensor information set in 12, 15 receives an alarm discrimination result data of each sensor 3 transmitted through each relay 2, and displays an alarm display and sounds an alarm sound. This is at least an alarm notification unit that performs the following. Also,
Reference numeral 10 denotes a signal processing circuit, which performs signal processing of each unit and, when the system is started, multiplexes the sensor information stored in the memory means 14 with a repeater address via the multiplex transmission control unit 11. Then, the transmission is sequentially performed to the repeater 2 side, and thereafter, the monitoring of the alert state of each sensor 3 is started.

As will be described later, 13 is a mode switching means having a mode switch 13a for switching and setting the operation mode of the system between the monitoring mode and the test mode, and 16 is an I / O port for inputting a switching control signal. And 17 are time measuring means for outputting a predetermined switching control signal every predetermined period.

FIG. 3 is a block diagram showing the internal configuration of the repeater 2 used in the system of the present invention. In FIG. 3, reference numeral 21 denotes data transmission with the receiver 1 by a multiplex signal,
A multiplex transmission control unit 22 for performing reception is an address setting unit for setting a repeater address unique to the repeater. 28
Is an I / O port for receiving a switching control signal for switching the alarm determination level of the sensor 3 via the control signal line IC. This switching control signal is a voltage signal, a contact signal or a contact signal. A signal whose information amount is increased by a combination of signals can be used. A sensor line multiplex transmission control unit 27 is provided for each of the sensor lines IS and transmits and receives data by a multiplex signal to and from a plurality of sensors 3 connected to each of the sensor lines IS. , 24 are the sensor lines derived from the repeater 2 among the sensor information stored in the memory means 14 of the receiver 1 when the system is started up.
The system memory 23 for sequentially taking in and storing information corresponding to the sensors 3... connected to the lS, 23 generates at least alarm determination result data obtained by determining a return signal returned from each sensor 3. It is a temporary memory for temporarily storing. 26 is provided for each sensor line IS,
Upon receiving a monitoring signal for monitoring the alert state of the sensor 3 connected to each sensor line IS, the monitoring signal based on the multiplex signal is polled to each sensor 3 via the sensor line multiplex transmission control unit 27. , A sensor line signal processing circuit for receiving and decoding a multiplexed signal returned from the sensor 3 and receiving and decoding the signal. A reference numeral 26a denotes data used when the sensor line signal processing circuit 26 performs signal processing. This is a transmission memory for storing the information. The sensor line signal processing circuit 26 reduces the load on a signal processing circuit described later by distributing the multiplex signal transmission process for each sensor line IS. Reference numeral 20 denotes a signal processing circuit which plays a central role in the operation of the repeater 2. Among the sensor information stored in the system memory 24, a monitoring signal having at least a line number and a sensor address is transmitted to a sensor line signal processing circuit. After sequentially transmitting by polling to the sensor 3 side via 26, the sensor 3
The return signal including the temperature detection signal returned from the side is received, and the temperature detection signal included in the response signal and each of the discrimination levels of the forecast, the fire report, and the interlock report stored in the system memory 24, I The alert status is determined by comparing the alert determination level set according to the switching control signal input to the / O port 28, and the determined alert determination result data is stored in the temporary memory 23. After the monitoring by polling of each of the detectors 3 has been completed in this way,
The operation of transmitting the alarm determination result data of each sensor 3 stored in the temporary memory 23 to the receiver 1 via the multiplex signal line 1 through the multiplex transmission control unit 21 is repeatedly performed.

The switching connection circuit 25 is for switching a signal transmitted between the signal processing circuit 20 and the sensor line signal processing circuit 26, and identifies a line number given to the transmitted signal. This is for performing signal switching connection.

In addition, the forecast discrimination level is a discrimination level for predicting the occurrence of a fire when the temperature of the mounting location of the sensor rises slightly during a fire. The discrimination level for reporting the occurrence of a fire when the temperature rises, and the interlocking report is for interlocking fire doors and smoke exhaust shutters to prevent the spread of the fire where the temperature of the sensor installation location further increased. Is the determination level.

FIG. 4 shows a sensor 3 used in the system of the present invention.
(In this embodiment, an analog sensor is used.) A block diagram shows the internal structure of the data processor. In the figure, reference numeral 31 denotes data by a multiplexed signal with the repeater 2 via the sensor line IS. A multiplex transmission control unit for transmitting and receiving data, 32 is an address setting unit for setting a sensor address unique to the sensor, and 34 is a thermosensitive element (not shown) whose electric resistance value changes according to the ambient temperature. A temperature detection circuit 34a for outputting an analog detection signal according to the ambient temperature, and an A / D conversion circuit 34b for converting the analog detection signal output from the temperature detection means 34a into corresponding digital data. Means 33 is a memory unit for storing at least data necessary for signal processing in a signal processing circuit described later. Reference numeral 30 denotes a signal processing circuit, and the sensor address assigned to the monitoring signal transmitted from the repeater 2 via the sensor line lS matches the address set by the address setting unit 32. In this case, a return signal in which the digital data corresponding to the ambient temperature output from at least the temperature detecting means 34 and the sensor address set by the address setting section 32 are added to the digital signal via the multiplex transmission line 31 through the multiplex transmission control section 31. Reply to the repeater 2 side.

Further, as described later, a test signal is transmitted from the repeater 2 via the sensor line IS, and the sensor address assigned to the test signal matches the address set by the address setting unit 32. In this case, a return signal obtained by adding at least the sensor address set by the address setting unit 32 to the same digital data as the test reference data added to the test signal is transmitted via the multiplex transmission control unit 31 via the multiplex signal line l. Repeater 2
Perform the operation to reply to the side.

The operation of the system of the present invention having such a configuration will be described below.

For each sensor 3 connected to the sensor line lS derived from the repeater 2, the line number, sensor address,
The receiver 1 transmits the sensor type such as the type of the sensor, at least two or more sets of each of the alert discrimination levels of the forecast, fire report, and link report, and a test reference signal used in a test mode described later.
The sensor information is set and input by the sensor information setting means 12, and the set sensor information is stored in the memory means 14 via the signal processing circuit 10.

When the system is started, each sensor information stored in the memory means 14 is attached with a repeater address of the repeater 2 to which the sensors are connected, and is transmitted through the multiplex transmission control unit 11 through the multiplex signal line l. Multiplexed signal to each repeater 2.

In each repeater 2, the signal processing circuit 20 receives and decodes the sensor information via the multiplex transmission control unit 21 and stores the sensor information having the same address as the repeater address set in the address setting unit in the system memory. Are sequentially stored. In this way, all the sensor information is stored in the system memory 24 of each repeater 2.
Is transferred to the monitoring mode for monitoring the alert status of each sensor.

In the monitoring mode, the repeater 2 sequentially outputs a monitoring signal with at least a line number and a sensor address to the corresponding sensor line signal processing circuit 26 via the switching connection circuit 25.

In the detector line signal processing circuit 26 that has received the monitoring signal,
The monitoring signal is sequentially output to each sensor 3 side by a multiplex signal through the sensor line multiplex transmission control unit 27 and the sensor line lS.

In each sensor 3, the signal processing circuit 30 receives and decodes the multiplexed signal via the multiplex transmission control unit 31, and the sensor address assigned to the multiplexed signal is the address set by the address setting unit 32 on the sensor 3 side. If it matches, a reply signal in which digital data corresponding to the ambient temperature output from the temperature detecting means 34 and a sensor address are added is returned and output to the sensor line lS via the multiplex transmission control unit 31.

On the repeater 2 side, this return signal is received and decoded by the sensor line signal processing circuit 26 via the sensor line multiplex transmission control unit 27, and this return signal is transmitted to the signal processing circuit 20 via the switching connection circuit 25. I do.

The signal processing circuit 20 generates an alarm corresponding to a switching control signal input through the I / O port 28, out of the digital data attached to the reply signal and the alarm determination level stored in the system memory 24. The judgment is made by comparing the judgment level with the judgment level, and the judgment result data of the judgment is stored in a temporary memory
Store them sequentially in 23.

Thus, when the alarm determination result data is transmitted from each sensor line signal processing circuit 26 to the signal processing circuit 20, the signal processing circuit 20 multiplexes the alarm determination result data stored in the temporary memory 23. The signal is transmitted to the receiver 1 through the multiplex signal line 1 through the control unit 21.

On the receiver 1 side, the signal processing circuit receives and decodes these report discrimination result data through the multiplex transmission control unit 11, stores them in the memory unit 14, performs necessary signal processing, and drives the alarm report unit 15. Perform necessary alarm display and alarm notification.

As described above, in the system of the present invention, the I / O
By inputting the switching control signal to the port, the alert determination level of the corresponding sensor 3 is switched, thereby equivalently changing the alert level of the sensor. By adding a switching control signal to the corresponding repeater 2 from air conditioning maintenance or the like, when lighting or air conditioning is operating (daytime), switching is set to a higher alarm determination level, and lighting and air conditioning are switched. When stopped (at night), the alarm determination level is switched to a lower one, thereby preventing erroneous alarms and performing fine monitoring (corresponding to claim 5).

In the above-described system of the present invention, the configuration is described in which the switching control signal is input to the I / O port 28 of the repeater 2. However, the present invention is not limited to such a configuration. A timer 29 for outputting a predetermined switching control signal at predetermined time intervals (for example, from 6:00 am to 6:00 pm and from 6:00 pm to 6:00 in the next morning) is provided (FIG. 3). The switching determination signal output from the timer 29 is applied to the I / O port 28, so that the alarm determination level can be automatically switched (corresponding to claim 2). In this configuration, for example, if priority is given between the switching control signal input from the outside and the switching control signal of the timer 29, various conditions such as daytime and nighttime, or occupancy and absence may be used. , It is possible to automatically set the switch to the most appropriate alert discrimination level.

Also, the I / O port is not provided on the repeater 2 side,
It is also possible to provide an I / O port 16 for inputting a switching control signal on the receiver 1 side (corresponding to claim 3, see FIG. 2). In such a configuration, when a switching control signal is input to the I / O port 16 of the receiver 1, the signal processing circuit 10 performs signal processing according to the sensor information stored in the memory means 14, and generates an alarm determination level. Of the relay 2 connected to the sensor 3 for performing the switching and the alarm determination level to be switched.
Then, a switching control signal assigned to the repeater address is output to the repeater 2 via the multiplex transmission control unit 11 as a multiplex signal, and the switching control signal is transmitted to the repeater 2 via the multiplex transmission control unit 21. The signal processing circuit 20 decodes the reception and switches the alert determination level.

Further, the receiver 1 is provided with a clocking means 17 for outputting a predetermined switching control signal every predetermined time (see FIG. 2), and the switching control signal output from the clocking means 17 is provided. Is added to the I / O port 16 to automatically switch the alert determination level (corresponding to claim 4).

In this embodiment, in addition to the above-described monitoring mode, a test mode for performing an operation test of each sensor can be switched and set. The mode of the mode switching means 13 of the receiver 1 will be described below. The operation when the mode is switched to the test mode by operating the changeover switch 13a will be described.

From the signal processing circuit 10 of the receiver 1 via the multiplex transmission control unit 11, a test start signal with a repeater address is sequentially output to the repeater 2 by the multiplex signal.

On the repeater side, the test start signal transmitted via the multiplex signal line 1 is received and decoded by the signal processing circuit through the multiplex transmission control unit 21, and at least the line number is included in the sensor information stored in the system memory 24. The test signal with the sensor address and the test reference data is transmitted to the corresponding sensor line signal processing circuit 26 through the switching connection circuit 25.

In the detector line signal processing circuit 26 that has received the test signal,
The test signal is sequentially transmitted to each sensor 3 by a multiplex signal via the sensor line multiplex transmission control unit 27 and the sensor 3 through the sensor line IS in a polling manner.

In the sensor 3 that has received the test signal, the signal processing circuit 30 determines whether or not the sensor address assigned to the test signal matches the address set by the address setting unit 32. The circuit 30 converts the digital data identical to the test reference data attached to the test signal into an address setting unit.
A reply signal with the sensor address set at 32 is generated, and the sensor line lS is output through the multiplex transmission control unit 31.

On the repeater 2 side, the return signal transmitted via the sensor line IS is received and decoded by the sensor line signal processing circuit 26 through the sensor line multiplex transmission control unit 27, and this return signal is transmitted via the switch connection circuit 25. To the signal processing circuit 20.

The signal processing circuit 20 determines whether the digital data of the transmitted return signal matches the test reference data of the corresponding sensor stored in the system memory 24, and sequentially stores the determined test determination result data in the temporary memory 23. Let it.

Each sensor line derived from the repeater 2 in this way
When the operation test by polling of all the sensors 3 connected to the lS is completed and the same operation test is completed for the other repeaters 2, the signal processing circuit 20 executes the operation of each of the sensors 3 stored in the temporary memory 23. The repeater address set by the address setting unit 22 is added to the test discrimination result data, and the data is transmitted to the receiver 1 by a multiplex signal via the multiplex signal line through the multiplex transmission control unit 21.

On the receiver 1 side, these test discrimination result data are received by the signal processing circuit 10 and stored in the memory means 14 and necessary signal processing is performed, and the alarm notification means 15 is driven to perform necessary alarm display and alarm notification. Do. Then, the mode switching means 13
When the mode changeover switch 13a is operated to switch to the monitoring mode, the alarm of the sensor is monitored again by the operation in the monitoring mode described above.

As described above, the operation test of the sensor of the entire system can be efficiently performed in a short time.

In the above-described operation in the test mode, the signal processing circuit 20 of the repeater 2 adds the test reference signal added to the test signal output to the sensor 3 and the return signal returned from the sensor 3. The operation state of the sensor 3 is determined by determining the coincidence with the obtained digital data. In addition to the coincidence of the data, a predetermined signal is output from the signal processing circuit 20 and the test signal is output. By determining whether or not a return signal is returned from the sensor 3 within a predetermined time, the reliability of the operation test can be improved.

In the above embodiment, the configuration using the heat detector is described. However, it is needless to say that the configuration using the smoke detector is also possible.

[Effects of the Invention] According to the present invention as set forth in claims 1 and 3, the alarm determination level of the sensor can be switched only by applying the switching control signal to the repeater, so that the alarm is issued according to the indoor situation. By switching and setting the level, it is possible to provide an intelligent fire alarm system that can prevent false alarms and realize early detection of a fire.

According to the present invention as set forth in claims 2 and 4, the alarm determination level is automatically switched at predetermined time intervals by a simple configuration provided with a timer, so that the presence or absence of a person or a high ambient temperature can be obtained. It is possible to automatically switch and set the alert determination level in accordance with conditions such as low and low. Therefore, claim 1
In addition to the above effects, a more intelligent fire alarm system can be provided.

According to the present invention described in claim 5, the presence of a person in the room,
The alert discrimination level of the sensor is automatically switched and set in conjunction with the system operated in conjunction with the absence. For this reason,
In addition to the effects of claim 1, a more intelligent fire alarm system can be provided.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of the present invention, FIG. 2 is a block diagram showing the internal configuration of the fire receiver, FIG. 3 is a block diagram showing the internal configuration of the repeater, and FIG. FIG. 2 is a block diagram showing an internal configuration of the container. [Description of Signs] 1 ... Fire receiver 10 ... Signal processing circuit 11 ... Multiple transmission control unit 12 ... Sensor information setting means 14 ... Memory means 15 ... Alarm notification means 2 ... Repeater 20 ... … Signal processing circuit 21… Multiplex transmission control unit 22… Address setting unit 23… Temporary memory 24… System memory 26… Detector line signal processing circuit 26a… Detector information memory 27… Detector line multiplexing Transmission control unit l: Multiple signal line lS: Sensor line

Claims (5)

(57) [Claims] 1. A fire receiver and a plurality of repeaters having repeater addresses are connected by multiple signal lines, and a plurality of sensors assigned at least a sensor address are connected from these repeaters. Deriving sensor lines and switching between multiple alarm determination levels for return signals including temperature detection signals corresponding to the ambient temperature and smoke density detection signals corresponding to the ambient smoke density returned from these sensors A fire alarm system configured to perform reception judgment by a repeater and to perform alarm notification by relay-transmitting the alarm judgment result data from the repeater to the receiver side, wherein the fire receiver includes the repeater A multiplex transmission control unit for transmitting and receiving data by a multiplex signal between the multiplex signal and a sensor number connected to a sensor line derived from the repeater. Sensor information setting means for setting and inputting sensor information in which at least two or more sets of discrimination levels of a forecast, a fire report, and an interlock report are added to a sensor address and a sensor type, and the sensor information setting A memory means for storing at least the sensor information set by the means, and receiving an alarm discrimination result data of each sensor transmitted through each of the relays, and performing an alarm display and sounding of an alarm sound. At least an alarm notifying unit that performs signal processing of each unit, and at the time of system startup, relays the sensor information stored in the memory unit through the multiplex transmission control unit using a multiplex signal with a repeater address. And a signal processing circuit for monitoring the alerting status of each sensor after that, and the repeater transmits and receives data by a multiplex signal to and from the receiver. Multiplex transmission control unit for performing communication, an address setting unit for setting a repeater address unique to the repeater, and an I / O port for receiving a switching control signal for switching the alert discrimination level of the sensor A sensor line multiplex transmission control unit, provided for each sensor line, for transmitting and receiving data by a multiplex signal between a plurality of sensors connected to each sensor line, At start-up, a system memory for sequentially taking in and storing information corresponding to the sensors connected to the derived sensor line from among the sensor information stored in the memory means on the receiver side, At least a temporary memory for temporarily storing alarm determination result data obtained by determining a response signal returned from each sensor, and a temporary memory provided for each sensor line and connected to each sensor line. Sensing In response to the monitoring signal for monitoring of the calling report states,
A sensor line signal processing for sequentially outputting a monitoring signal based on a multiplex signal to each sensor by polling via the sensor line multiplex transmission control unit and receiving and decoding a return signal based on the multiplex signal returned from these sensors. Circuit, and among the sensor information stored in the system memory, at least a line number, a monitoring signal with a sensor address is sequentially transmitted by polling to the sensor side through the sensor line signal processing circuit, Receiving a return signal including a temperature detection signal and a smoke temperature detection signal returned from the sensor side, and a temperature detection signal and a smoke concentration detection signal included in the return signal, and a forecast stored in the system memory, Fire reports,
Among the respective discrimination levels of the interlocking report, the discrimination of the report status is performed by comparing the report discrimination level switched and set according to the switching control signal input to the I / O port,
The determined alarm determination result data is stored in the temporary memory, and after the monitoring by polling of each sensor has been completed in this way, the alarm determination result data of each sensor stored in the temporary memory is stored in the temporary memory. A fire alarm system having an alarm level switching function, comprising: a signal processing circuit that repeatedly performs an operation of transmitting to the receiver via a multiplex signal line. 2. The relay device according to claim 1, further comprising: a timer for outputting a predetermined switching control signal at predetermined time intervals, wherein the switching control signal output from the timer is output. 2. The fire alarm system having an alarm level switching function according to claim 1, wherein the alarm level is automatically switched by adding the alarm level to the I / O port. 3. An I / O port provided on the repeater side is removed, and instead, the fire receiver is provided with an I / O port for inputting a switching control signal, The I / O
When a switching control signal is input to the port, the signal processing circuit performs signal processing in accordance with the sensor information stored in the memory means, and switches the alarm determination level via the multiplex transmission control unit. The switching control signal is output by the multiplex signal to the connected repeater, while the other repeater receives and decodes the switching control signal in the signal processing circuit via the multiplex transmission control unit to determine the alert. The fire alarm system having an alarm level switching function according to claim 1, wherein the fire alarm system switches the level. 4. The fire receiver according to claim 1, further comprising a timer for outputting a predetermined switching control signal every predetermined time, and a switching control signal output from the timer. To the above I / O port,
The fire alarm system having an alarm level switching function according to claim 3, wherein the alarm discrimination level is automatically switched. 5. The system according to claim 1, wherein the switching control signal is an exit management system,
The fire alarm system according to claim 1, wherein the fire alarm system is a signal based on a control signal output from an air conditioner, an electric lock system, or the like.