KR101264266B1 - R type fire alarm repeater and control panel system with signal line error resilience - Google Patents

Abstract

R-type fire alarm receiver according to an embodiment of the present invention is a line interface, the signal line of the line interface for generating a detection signal that is inactivated to a normal state or activated in an alarm state according to the degree of change in the voltage level of the signal line to which a plurality of detectors or transmitters are connected It is possible to diagnose the state of the signal line according to the result of the statistical analysis of the line state measuring unit for generating a state signal having a voltage value, a current value or information proportional thereto, and the measurements of sampled state signals while the sensing signal is inactive. It may include a diagnostic unit.

Description

R-TYPE FIRE ALARM REPEATER AND CONTROL PANEL SYSTEM WITH SIGNAL LINE ERROR RESILIENCE}

The present invention relates to fire monitoring and, more particularly, to an R-type receiver.

Conventionally, the R-type fire alarm receiver system is a short signal type detector which outputs only 0 and 1 depending on whether a fire has occurred, and a multilevel type which outputs a signal of several levels according to the occurrence of temperature, flame, smoke, etc. A variety of detectors can be connected to the signal line, such as detectors, analog detectors that continuously output temperature, flame, smoke, etc., and addressable detectors that can be assigned unique addresses to each detector.

Since the types, specifications, quantities, distances, etc. of the detectors to be installed by location or by use are specified, it is common to connect several types of detectors to one type R fire alarm receiver.

However, if the wiring of the signal is different for different types of detectors, the construction is complicated and there is a high possibility of malfunction. Therefore, it is generally desirable to design the power supply and the signal transmission together through one cable.

In the case of a short signal type detector, a voltage of 24 V DC is applied, and the voltage drop of the signal line generated when the internal sensing circuit is short-circuited by fire heat, spark or smoke, or short-circuit by human switch pressing operation. By sensing, it is configured to know the fire occurrence in the area where the signal line is arranged.

Multi-signal detectors, analog detectors and addressable detectors, like single-signal detectors, are supplied with 24 VDC power through signal lines, and for example, power line communications (PLC) via digital signals containing addresses or measurements. Modulate and transmit to the repeater or R-type receiver.

Under normal circumstances, the signal line should maintain a constant voltage. However, after a long period of several years to several decades, unless there is a fire after installation, deterioration of insulation characteristics due to corrosion, denaturation or moisture, surge or lightning may occur. The phenomenon of voltage induction by AC power line or telephone line using 48V DC can cause instantaneous voltage drop on the signal line itself, which usually leads to false alarms, malfunction of the detector and failure.

Indeed, in many buildings, false alarms are observed due to line aging or voltage induction, and many landlords make the wrong choice to turn off the fire alarm system instead of replacing signal lines and eliminating the cause.

The problem to be solved by the present invention is to provide a repeater and R-type fire alarm receiver system that can withstand the error of the fire detection line and can flexibly cope with false alarms.

Repeater for an R-type fire alarm receiver system according to an aspect of the present invention,

Communication module that receives alarm signals in digital form from sensing circuits or non-single detectors that generate sensing signals that are either deactivated normally or in an alarm state depending on the degree of change in the voltage level of the signal line to which the single signal detectors or transmitters are connected A track interface comprising a;

A line state measuring unit configured to generate a state signal having a voltage value, a current value, or information proportional to the signal line; And

The diagnosis unit may include a diagnosis unit for diagnosing a state of the signal line according to a result of statistical analysis of measurements of sampled state signals while the detection signal is deactivated or while the alarm signal is not received.

According to an exemplary embodiment, the diagnostic unit may include t = 0 days within a predicted state range or a trend and a predetermined normal range of the state signal according to a statistical analysis result of the measurements sampled N times before t = 0 with respect to the state signal. If there is a sampled measurement of the state signal at the time, the signal line can be operated to determine that it is normal.

According to one embodiment, the repeater for the R-type fire alarm receiver system,

The apparatus may further include a false alarm determining unit configured to determine whether the sense signal is false alarm by comparing the state signal sampled while the sensing signal is activated to a predetermined alarm threshold voltage.

According to an embodiment, the alarm threshold voltage may be determined according to a statistical analysis result of survey values regarding the state signal.

R-type fire alarm receiver system according to another aspect of the present invention,

Type R fire alarm receivers that at least one repeater receives sensing signals from multiple short signal detectors or transmitters connected to the signal line, or receives alarm signals from non-short signal detectors connected to the communication line and passes them to the Type R fire alarm receiver. As a system,

Generates a state signal having a voltage value, a current value, or information proportional to the signal line, and while the detection signal is inactive or while an alarm signal is not received, according to a statistical analysis of the measurements of the sampled state signal. A repeater for diagnosing a state of the signal line; And

And an R-type fire alarm receiver for receiving an activated detection signal or an alarm signal through the repeater, and receiving a result of diagnosing the signal line in the repeater.

The detection signal is a signal that is deactivated to a normal state or activated to an alarm state according to the degree of voltage level variation of a signal line to which single signal detectors or transmitters are connected, and the alarm signal is a digital form received from a non-stage signal detector through a signal line. It may be a signal of.

Signal line monitoring method of the R-type fire alarm receiver system according to another aspect of the present invention,

A signal line monitoring method of an R-type fire alarm receiver system in which at least one repeater receives a detection signal or an alarm signal from a plurality of detectors or transmitters connected to a signal line and transmits the detected signal or the alarm signal to an R-type fire alarm receiver.

At the repeater, short-signal detectors or transmitters generate a sense signal from a voltage level of a signal line connected in parallel or receive an alarm signal from the non-short-signal detectors via the signal line;

Generating, at the repeater, a state signal having a voltage value, a current value, or information proportional to the signal line; And

Diagnosing, at the repeater, the state of the signal line in accordance with a statistical analysis of the measurements sampled on the state signal while the sense signal is inactive or while the alert signal is not received,

The detection signal is a signal that is deactivated to a normal state or activated to an alarm state according to the degree of voltage level variation of a signal line to which single signal detectors or transmitters are connected, and the alarm signal is a digital form received from a non-stage signal detector through a signal line. It may be a signal of.

According to one embodiment, diagnosing the state of the signal line,

The sampled measurement of the state signal when t = 0 within a predetermined normal range and the predicted state range or tendency of the state signal according to the statistical analysis of the measurements sampled N times before t = 0 with respect to the state signal If yes, it may include determining that the signal line is normal.

According to one embodiment, the signal line monitoring method of the R-type fire alarm receiver system,

The method may further include determining whether the detection signal is false alarm by comparing the state signal sampled while the detection signal is activated to a predetermined alarm threshold voltage.

According to an embodiment, the alarm threshold voltage may be determined according to a statistical analysis result of survey values regarding the state signal.

According to the repeater and the R-type fire alarm receiver system of the present invention, it is possible to measure the usual voltage drop level that reflects long-term line aging. The building manager may refer to these dropped voltage levels to replace the line, or adjust the threshold voltage level to be determined as a fire alarm based on the degree of voltage drop as usual.

In addition, according to the repeater and the R-type fire alarm receiver system of the present invention, it is possible to maintain different fire alarm threshold voltage level for each of the plurality of sensing lines.

Furthermore, according to the repeater and the R-type fire alarm receiver system of the present invention, when a false alarm occurs due to the instantaneous voltage drop due to noise or voltage induction, it is possible to filter out the false alarm instead of immediately issuing an alarm.

1 and 2 are conceptual views illustrating an R-type fire alarm receiver system including a repeater that is robust to errors in a fire detection line and flexible to false alarms according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a procedure in which a repeater monitors a voltage or current state of a fire detection line for a long time in an R-type fire alarm receiver system according to an exemplary embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

In the detailed description of the present invention, a "single signal detector" means a conventional detector connected to a common signal line and only knows whether a fire is detected and which detector is not detected. "Detector" refers to a detector capable of communicating to a repeater or a fire alarm receiver a signal containing whether a fire has been detected and identification information of the detector, or a signal containing continuous or discontinuous levels of measurement information.

1 and 2 are conceptual views illustrating an R-type fire alarm receiver system including a repeater that is robust to errors in a fire detection line and flexible to false alarms according to an embodiment of the present invention.

1 and 2 together, the R-type fire alarm receiver system 10 includes a plurality of monitoring zones 11 in which a plurality of detectors 111a and 111b or a transmitter 112 are connected in parallel to the signal line 113. R-type fire alarm receiver 12 for receiving alarm signals and diagnostic signals and outputting control signals, for identifying alarm signals carried on multiple signal lines 113 and between monitoring zone 11 and R-type receiver 12. In may include a repeater 13 for transmitting an alarm signal, a diagnostic signal, a control signal.

Briefly describing the wiring of the signal line 113 for the reception of the fire alarm, the detectors 111a and 111b and the transmitter 112 are connected in parallel to the signal line 113 terminated by the termination resistor 114, The signal line 113 is designed such that a predetermined direct current voltage, for example, a direct current 24 V voltage according to the related regulations, is maintained from the repeater 13. This DC 24V voltage can be used as a power source for the detector 111.

The detector 111a is a single signal type detector. In general, when heat or smoke caused by a fire is applied to a predetermined level or more, the internal resistance is rapidly lowered or short-circuited. The transmitter 112 is applied to an external force pressed by a person who finds a fire. By closing the switch, the internal resistance is lowered, and accordingly a change in voltage level is designed to generate an alarm signal at the repeater 13.

In this case, normally, the repeater 13 connected to the short signal type detector 111a monitors the level of the DC voltage applied to the signal line 113, and then the internal resistance of the short signal type detector 111a or the transmitter 112 suddenly becomes sudden. When falling, the sensing circuit 131a detects a voltage change in which the DC voltage level falls from within 24V to 5V according to the equivalent resistance of the signal line 113, thereby generating an alarm. The repeater 13 generates an alarm signal in the form of a digital packet based on the detection of the voltage change in the control unit 135 and the address given to it, and outputs it through the first port 137, finally, the R type fire alarm. Transmit to the receiver 12.

When the detector 111b is a non-short signal type such as a multi-signal type, an analog type or an address type detector, the direct current 24V voltage of the signal line 113 is used as a power source, and the result of detecting heat, temperature, flame, and smoke It generates its own address as a digital alarm signal and modulates it with a direct current 24V voltage of the signal line 113 by a power line communication method (PLC) and outputs it.

In this case, the repeater 13 may output the digital type alarm signal received from the communication module 131b through the signal line 113 from the first port 137 and transmit the same to the R type fire alarm receiver 12 as it is. . The repeaters 13 are multidrop or multipoint connected according to the RS-485 / 422 standard, so that an alarm signal of a digital form transmitted from the other repeater 13 connected to the second port 138 to the first port ( 137) can be used for relaying.

The repeater 13 may accommodate several detectors of a limited kind, among a variety of sensors such as short signal, multi signal, analog or address type. For example, in the case of a short signal type detector, power is supplied through the signal line 113. In the case of non-single-type detectors such as multi-signal, analog to address type detectors, the signal line 113 may include two strands of conductors, and may serve as a communication function through power supply and power line communication, and may include four strands of conductors. Two strands of each can be used as communication lines and power lines.

In FIG. 1, although several types of detectors 111a and 111b are connected to one signal line 113, a single signal type sensor and other types of detectors share the signal line 113 connected to one receiving channel. This may be difficult and it may be desirable to connect to different signal lines 113, respectively.

However, a large number of monitoring zones 11 and detectors 111a and 111b, transmitters 112, and termination resistors 114 installed in each are connected to a plurality of signal lines 113 and installed in a building. Since cables used by various telecommunication facilities are often installed side by side with the signal line 113, the detectors, the transmitters, and the termination resistors may be aging, and there may be a problem in the connection state. In the surge), the DC voltage appearing on the signal line 113 may be lower than the threshold voltage set in the sensing circuit inside the line interface 131. If the short signal type detector 111a is connected to the repeater 13, in this case, an incorrect fire alarm may be generated. If the repeater 13 is connected to the detector 111b such as a short signal type, a multi-signal type, an analog type or an address type, in this case, the information contained in the alarm signal may be contaminated, thereby transmitting or receiving a false alarm signal or malfunctioning.

In order to cope with this problem, the repeater 13 according to the embodiments of the present invention includes a line interface 131, a sensing circuit 131a, a communication module 131b, a line state measuring unit 132, and a diagnosis unit 133. ), The false alarm determining unit 134, the control unit 135, the power supply unit 136, and the first and second ports 137 and 138 may be illustratively included.

In some embodiments, the repeater 13 may include only one or both of the sensing circuit 131a and the communication module 131b.

The line interface 131 applies a 24V DC voltage supplied from the power supply unit 136 to the signal line 113. The sensing circuit 131a senses a change in the voltage level of the signal line 113 to generate the sensing signal S1.

In this case, when the detector 111a is a short signal type detector, the detection signal S1 is activated to have a value of 0 or 1 meaning normal or alarm depending on a result of comparing the signal line voltage level with a predetermined alarm threshold voltage level. It may be a digital signal.

According to an exemplary embodiment, the sensing signal S1 may be a signal before determining whether the voltage change of the signal line 113 is caused by a fire alarm or by a surge or voltage disturbance.

// Alternatively, when the detector 111b is a multi-signal or analog type, the sensing signal S1 may be digital data obtained by restoring an alarm signal output from the detector 111b to the signal line 113 by the sensing circuit.

The line state measuring unit 132 continuously or intermittently, periodically or frequently, measures the voltage or current of the signal line 113 separately from the sensing circuit 131a of the line interface 131, and measures the measured voltage or current value. Or outputs a status signal S2 having information proportional thereto in an analog form or a digital form.

In one embodiment, the line state measuring unit 132 further includes an analog-to-digital conversion circuit therein, to digitally measure the voltage level or the current level of the signal line 113 and measure the state signal S2 in digital form. You can also create

In this case, the line state measuring unit 132 may further include an analog multiplexer (MUX) to be sequentially connected to each of the plurality of signal lines 113 through the analog MUX. By measuring the voltage level or the current level one by one, the status signals S2 may be sequentially generated for each of the plurality of signal lines 113.

In another embodiment, the line state measuring unit 132 generates an analog state signal S2 in proportion to the voltage level or current level of the signal line 113, and the analog state signal S2 is a control unit ( 135 may be applied to an analog-to-digital conversion circuit built in or provided separately and converted to digital form for later digital processing.

The diagnosis unit 133 is based on the detection signal S1 provided by the sensing circuit 131a of the line interface 131 and the state signal S2 provided by the line state measurement unit 132. Can be diagnosed.

The operation of the diagnosis unit 133 may be performed while the detection signal S1 provided by the detection circuit 131a maintains a non-alarm state or when an alarm signal is not received by the communication module 131b.

In detail, the diagnostic unit 133 samples the state signal S2 provided by the line state measuring unit 132 at a relatively long period and a long period, for example, every hour for a period of several days, and then measures the measured value of the state signal S2. Can be obtained, the statistical characteristics can be analyzed based on the measurements, and the estimated state range or future trend of the signal line voltage level or current level can be estimated according to the statistical characteristic analysis. The statistical characterization herein may include, for example, conventional statistical analysis techniques such as evaluation of the mean, variance, deviation of the signal line voltage or current levels to their temporal change, trend, and the like.

Furthermore, the diagnosis unit 133 may determine the alarm threshold voltage based on the measured values. For example, if the average value of the signal line voltage level is about 20V, the alarm threshold voltage may be determined at about 4V.

Meanwhile, the acquired measurements may be stored in a first-in first-out (FIFO) status signal storage provided in the diagnosis unit 133.

The diagnostic unit 133 may be configured to predict the range or trend of the state signal S2 newly acquired at t = 0 according to the statistical characteristic analysis of the N state signals S2 previously acquired, for example, before t = 0. The signal line 113 may be determined to be normal if it is within an average value of the N state signals S2 and a predetermined normal range, for example, 20 to 24V, and if not, the signal line 113 may be determined to be abnormal. . If, for example, the newly acquired state signal S2 is out of the average value of the previous N state signals S2 or a predetermined normal range, it is determined that the state of the signal line 113 is abnormal. 133 may generate a diagnostic signal indicating that the signal line 113 is abnormal to notify the R-type fire alarm receiver 12.

After determining whether the signal line 113 is normal, the diagnostic unit 133 updates the state signal storage space with the state signal S2 of t = 0. In this case, the first-in, first-out state signal storage deletes the state signal measurement previously recorded and adds the newly acquired state signal measurement of t = 0.

When the signal line 113 is determined to be in an abnormal state when t = 0, for example, moisture has flowed into the cable of the signal line 113, a surge occurs in a separate power source introduced into the signal line, or the signal line 113 The noise may be induced in the power cable installed adjacent to the cable, or the wiring may be defective, or the detectors 111a and 111b may be defective.

On the other hand, when the detection signal S1 fluctuates to an alarm state, whether a false alarm or a real fire alarm, the false alarm determination unit 134 determines whether the detection signal S1 is a false alarm or an actual fire alarm with respect to the corresponding signal line 113. Further determination may be made based on the state signal S2 provided by the line state measuring unit 132.

Specifically, the false alarm determining unit 134 acquires the state signal S2 at a relatively short time and period after the detection signal S1 changes to the alarm state, and the state signals S2 before t = 0. Based on the alarm threshold voltage determined by the diagnostic unit 133, the newly obtained status signals (S2) are compared for a predetermined time.

If the detection signal S1 from the short signal detector 111a is caused by an actual fire, the status signal S2 will continue to display a voltage level lower than the alarm threshold voltage for a predetermined time or more during a new acquisition, in which case The false alarm determining unit 134 determines the detection signal S1 or the alarm signal as the actual alarm.

On the contrary, if the detection signal S1 is changed to the alarm state by the momentary voltage change, the status signal S2 will return to the voltage level higher than the alarm threshold voltage within a predetermined time immediately during the new acquisition, in this case The false alarm determining unit 134 determines the detected signal S1 or the alarm signal as a false alarm.

The control unit 135 controls the operation of the diagnosis unit 133 and the false alarm determination unit 134 and the operation of other components, and generates data generated in connection with the diagnosis of the signal line 113, for example, the status signal S2. Can be stored and managed.

The controller 135 may transmit a diagnostic signal according to a diagnosis result of the signal line 113 of the diagnosis unit 133 to the R-type fire alarm receiver 12 through the first port 137.

FIG. 3 is a flowchart illustrating a procedure in which a repeater monitors a voltage or current state of a fire detection signal line for a long time in an R-type fire alarm receiver system according to an embodiment of the present invention.

Referring to FIG. 3, in step S31, in the repeater, the sensing signal S1 is generated from the voltage level of the signal line 113 in which the short signal type detectors 111a or the transmitters 112 are connected in parallel, or not. The alarm signal may be received from the signal type sensors through the signal line 113.

Specifically, the line interface 131 applies a 24V DC voltage supplied from the power supply unit 136 to the signal line 113, and the sensing circuit 131a compares the voltage level of the signal line 113 to a predetermined alarm threshold voltage. To generate a detection signal S1 that is activated. While the detection signal S1 is inactive or while the alarm signal is not received, the process proceeds to step S32, and when the detection signal S1 is activated in the alarm state or the alarm signal is received, the process proceeds to step S36. .

In step S32, the line state measuring unit 132 continuously or intermittently, periodically or frequently, measures the voltage or current of the signal line 113, and the state signal having information on the measured voltage or current value ( Output S2) in analog form or digital form.

The status signal S2 in analog form may be ultimately processed by the diagnostic unit 133 or the false alarm determination unit 134 after being converted into digital form by an analog-digital converter built in the control unit 135 or separately provided. have.

In step S33, the diagnostic unit 133 samples the state signal S2 provided by the line state measuring unit 132 in a relatively long period and a long period so that the measured value of the N times state signal S2 before t = 0 is measured. , The statistical characteristics are analyzed based on the measurements, and the estimated state range or future trend of the signal line voltage level is estimated according to the statistical characteristic analysis. Furthermore, the diagnosis unit 133 may determine the alarm threshold voltage based on the measured values.

In step S34, if the measurement value of the state signal S2 newly acquired at t = 0 is within the predicted state range or trend and the predetermined normal range previously estimated by the diagnosis unit 133, the signal line 113 is normal. Otherwise, it is determined to be abnormal.

In step S35, the state signal storage space is updated with the state signal S2 of t = 0.

In the step S36 optionally performed, when the detection signal S1 changes to an alarm state or when an alarm signal is received, the false alarm determination unit 134 determines whether the detection signal S1 is a false alarm. Whether the alarm is an alarm may be further determined based on the state signal S2 provided by the line state measuring unit 132 with respect to the signal line 113.

Specifically, based on the measurements of the state signal S2 sampled during the previous steady state, acquiring measurements of the state signal S2 in a relatively short time and period after the detection signal S1 has changed to the alarm state. The measurement values of the newly acquired state signal S2 are compared to a predetermined or predetermined alarm threshold voltage in the unit 133 for a predetermined time.

For example, in step S36, the false alarm determining unit 134 determines the detection signal S1 as an actual fire alarm if the state signal S2 is kept lower than the alarm threshold voltage for longer than a predetermined time, and vice versa. When S2 returns to a voltage level higher than the alarm threshold voltage within a predetermined time, the detection signal S1 may be determined as a false alarm.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art. Modifications are possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all of the equivalent or equivalent variations will fall within the scope of the present invention.

10 R type fire alarm receiver system
11 watched areas
111a, 111b detector 112 transmitter
113 Signal line 114 Termination resistor
12 R type fire alarm receiver
13 Repeater 131 Line Interface
131a sensing circuit 131b communication module
132 Line Status Measurement Unit 133 Diagnostic Unit
134 False alarm judgment unit 135 control unit
136 Power Supply

Claims (9)

Communication module that receives alarm signals in digital form from sensing circuits or non-single detectors that generate sensing signals that are either deactivated normally or in an alarm state depending on the degree of change in the voltage level of the signal line to which the single signal detectors or transmitters are connected A track interface comprising a;
A line state measuring unit configured to generate a state signal having a voltage value, a current value, or information proportional to the signal line; And
And a diagnostic unit for diagnosing a state of the signal line according to a result of statistical analysis of measurements of sampled state signals, while the detection signal is inactive or while the alarm signal is not received. The method according to claim 1, wherein the diagnostic unit, when t = 0 in the predicted state range and the trend and the predetermined normal range of the state signal according to the statistical analysis results of the measurements sampled N times before t = 0 with respect to the state signal A repeater for the R-type fire alarm receiver system, wherein the signal line is operable to determine if said signal line is normal if there is a sampled measurement of said state signal. The method according to claim 1,
And a false alarm determining unit for determining whether the detected signal is false alarm by comparing the state signal sampled while the detection signal is activated to a predetermined alarm threshold voltage. The method according to claim 3,
And the alarm threshold voltage is determined according to a statistical analysis result of the survey values related to the status signal. Type R fire alarm receivers that at least one repeater receives sensing signals from multiple short signal detectors or transmitters connected to the signal line, or receives alarm signals from non-short signal detectors connected to the communication line and passes them to the Type R fire alarm receiver. In the system,
Generates a state signal having a voltage value, a current value, or information proportional to the signal line, and while the detection signal is inactive or while an alarm signal is not received, according to a statistical analysis of the measurements of the sampled state signal. A repeater for diagnosing a state of the signal line; And
And an R-type fire alarm receiver for receiving an activated detection signal or an alarm signal through the repeater, and receiving a result of diagnosing the signal line in the repeater.
The detection signal is a signal that is deactivated to a normal state or activated to an alarm state according to the degree of voltage level variation of a signal line to which single signal detectors or transmitters are connected, and the alarm signal is a digital form received from a non-stage signal detector through a signal line. R-type fire alarm receiver system, characterized in that the signal. A signal line monitoring method of an R-type fire alarm receiver system in which at least one repeater receives a detection signal or an alarm signal from a plurality of detectors or transmitters connected to a signal line and transmits the detected signal or the alarm signal to an R-type fire alarm receiver.
At the repeater, short-signal detectors or transmitters generate a sense signal from a voltage level of a signal line connected in parallel or receive an alarm signal from the non-short-signal detectors via the signal line;
Generating, at the repeater, a state signal having a voltage value, a current value, or information proportional to the signal line; And
Diagnosing, at the repeater, the state of the signal line in accordance with a statistical analysis of the measurements sampled on the state signal while the sense signal is inactive or while the alert signal is not received,
The detection signal is a signal that is deactivated to a normal state or activated to an alarm state according to the degree of voltage level variation of a signal line to which single signal detectors or transmitters are connected, and the alarm signal is a digital form received from a non-stage signal detector through a signal line. Signal line monitoring method of the R-type fire alarm receiver system, characterized in that the signal of. The method of claim 6, wherein diagnosing the state of the signal line comprises:
The sampled measurement of the state signal when t = 0 within a predetermined normal range and the predicted state range or tendency of the state signal according to the statistical analysis of the measurements sampled N times before t = 0 with respect to the state signal Determining if the signal line is normal, if any. 8. The R-type fire alarm receiver system according to claim 7, further comprising the step of determining whether the detection signal is false alarm by comparing the state signal sampled while the detection signal is activated to a predetermined alarm threshold voltage. Signal line monitoring method. The signal line monitoring method according to claim 6, wherein the alarm threshold voltage is determined according to a statistical analysis result of the survey values related to the status signal.

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