KR102361512B1 - An address type fire detection device that generates AC current with multiple frequency components AND a fire detection system including the same - Google Patents

Abstract

An address-type fire detector for generating an alternating current having a plurality of frequency components includes an address setting unit generating an address code value corresponding to an electrical connection state of each of a plurality of switches, and a plurality of address code values corresponding to the address code values one-to-many. A microprocessor for adding and outputting a frequency signal and an operation confirmation voltage to the output value of the fire detection sensor, and outputting an AC voltage having a plurality of frequency components corresponding to one-to-many address code values, but adding an operation confirmation voltage to the output value of the fire detection sensor It characterized in that it comprises a voltage-frequency converter for outputting the added value to be reflected in the amplitude of the AC voltage, and a voltage-to-current converter for driving a current corresponding to the voltage level of the AC voltage to the power line.

Description

An address type fire detection device that generates AC current with multiple frequency components AND a fire detection system including the same}

The present invention relates to a fire detection device, and more particularly, to an address-type fire detector insensitive to noise by generating an alternating current having a plurality of frequency components, and a fire detection system including the same.

Korean Patent No. 10-1811402 is an address-type fire detection device using a voltage-controlled current source controlled by a digital-to-analog converter and a fire detection system including the same.

1 is an address type fire detector and fire detection system using a conventional current source.

The configuration of the ‘address-type fire detection system using a voltage-controlled current source’ consists of a receiver, an address-type fire detector using several constant current sources, and a terminating resistor as shown in FIG.

As shown in FIG. 1, the receiver consists of a current detector, a microcomputer with an analog to digital converter (ADC), and a display module.

Each address type fire detector using a constant current source is composed of an address setting unit, a D/A conversion unit, a fire detection sensor, and a constant current source circuit unit.

In Figure 1, the address setting unit of the 'address type fire detector using a constant current source' serves to set the address of the fire detector in binary form, and the D/A conversion unit converts the address set in binary form into analog voltage and outputs it. In addition, the constant current source circuit unit serves to flow the current controlled by the output voltage of the D/A change unit to the +24V power line when the fire detection sensor operates.

In FIG. 1, the 'current detection unit' of the receiver detects the DC current I flowing through the +24V power line through the resistor R _sense and amplifies it with an amplifier. 'Micom' receives the output voltage of the amplifier through ADC (Analog to Digital Coverter), finds out whether it is in normal state and the address of the fire detector that has operated (that is, the location of the fire), and sends the result to the 'display module'. The display module serves to display the information received from the microcomputer, that is, whether it is in a normal state and the location of the fire.

개의 화재 감지기가 연결된 경우를 설명한다. 도면 1의 화재감지기에서, 화재 발생 여부에 관계없이 화재감지기의 주소설정부, 화재감지 센서, D/A변환부 그리고 정전류원 회로부에 항상 전원이 공급된다. 화재가 발생하지 않은 정상상태에서 k번 주소의 화재감지기에 흐르는 직류전류

를

이라고 하고, 정상상태에서 수신기의 전류검출부에 있는 저항

에 흐르는 직류전류

를

이라고 하면,

이다. 여기서 N 은 수신기에 연결된 화재 감지기 수의 총 합이다.To the receiver in Figure 1

A case in which two fire detectors are connected will be described. In the fire detector of FIG. 1, power is always supplied to the address setting unit, the fire detection sensor, the D/A conversion unit, and the constant current source circuit unit of the fire detector regardless of whether a fire occurs. DC current flowing through the fire detector at address k in the normal state where there is no fire

cast

, and the resistance in the current detection part of the receiver in the steady state

direct current flowing through

cast

If you say

to be. where N is the sum of the number of fire detectors connected to the receiver.

의 직류전류가 흐르고, 화재가 발생하여 k번 주소의‘정전류원 이용 주소형 화재감지기’가 동작하면 +24V 전원선에

의 직류전류가 흐른다.

의 크기는‘정전류원 이용 주소형 화재감지기’의 주소설정부에서 설정한 주소값

에 따라 크기가 결정된다. 예를 들어, 1번 주소의 ‘정전류원 이용 주소형 화재감지기’가 동작하면

의 값은 1번 주소값에 대응하는

1㎃이고, 2번 주소의 ‘정전류원 이용 주소형 화재감지기’가 동작하면

의 값은 2번 주소에 대응하는

2㎃이다.In the normal state where all fire detectors do not work because there is no fire, the +24V power line is connected.

If a direct current of

direct current flows.

The size is the address value set in the address setting part of the 'address type fire detector using a constant current source'.

size is determined according to For example, if 'address type fire detector using constant current source' of address 1 operates,

The value of is corresponding to address number 1

If it is 1㎃ and the 'address type fire detector using a constant current source' of address 2 operates,

The value of is corresponding to address 2

It is 2 mA.

를 저항

에 걸리는 전압

로 검출하고 증폭기로

배 증폭한다. 마이컴은 ADC(Anlog to Digital converter)를 통하여 증폭된

의 전압을 디지털 신호로 변환하고, CPU는 변환된 결과를 입력받아 프로그램 처리하여 정상상태 여부와 동작한 화재감지기의 주소(즉, 화재발생 위치)를 알아낸다. 디스플레이 모듈은 정상상태 여부와 화재발생 위치를 나타내 준다.The current detector of the receiver is a DC current flowing through the +24V power line.

resist

voltage across

detected by the amplifier and

double amplify The microcomputer is amplified through ADC (Anlog to Digital converter).

converts the voltage to a digital signal, and the CPU receives the converted result and processes the program to find out whether it is in a normal state and the address of the fire detector (that is, the location of the fire). The display module indicates whether the state is normal or not and the location of the fire.

의 전류가 흐르므로 CPU에서 받아들인 전압값은

이다. k번 주소에서 화재가 발생하여 k번 주소의 ‘정전류원 이용 주소형 화재감지기’가 동작하면, +24V 전원선에

의 전류가 흐르므로 CPU에서 받아들인 전압값은

이다. 따라서, CPU에서 받아들인 전압값이

에서

으로

만큼 증가하면 k번 주소의 ‘정전류원 이용 주소형 화재감지기’가 동작한 것으로 판단할 수 있어 동작한 화재감지기의 주소 k를 알아내는 방식이다.When there is no fire, the +24V power line is

current flows, so the voltage value received by the CPU is

to be. If a fire occurs at address k and the 'address type fire detector using a constant current source' at address k operates, the +24V power line

current flows, so the voltage value received by the CPU is

to be. Therefore, the voltage value received from the CPU is

at

by

If it increases by that amount, it can be determined that the 'address type fire detector using a constant current source' at address k has been activated, so it is a method to find out the address k of the fire detector that has operated.

의 직류전류가 더 흐르게 함으로써 동작한 화재감지기의 주소 k를 알아내는 방법이므로 기존의 통신선을 이용하는 방법이나 +24V 전원선을 이용한 통신 방법보다 설치비가 적게 드는 장점이 있다.In the conventional system, when the fire detector at address k operates, the +24V power line is connected to the

Since it is a method to find out the address k of the fire detector that has operated by allowing more DC current to flow, it has the advantage of lower installation cost than the existing method using a communication line or a communication method using a +24V power line.

However, since the conventional system is a method of finding out the address of a fire detector operated by an increase in DC current flowing through the +24 [V] power line, it may malfunction if several fire detectors operate at the same time. For example, if fire detector 1 and fire detector 2 operate at the same time, there is a disadvantage in that it can be determined that fire detector 3 is operating.

Also, the existing method is a method to find out the address of a fire detector that has operated by limiting it to an on/off type fire detector, and cannot be applied to an analog type fire detector.

Korea Patent Registration No. 10-1811402

The present invention has been proposed to solve the above technical problems, and it can operate using only a power line without the need for an additional communication line, and fire detection that can be applied to an analog type fire detector using an alternating current provide the system.

In addition, there is provided an address-type fire detector insensitive to noise by generating an alternating current having a plurality of frequency components, and a fire detection system including the same.

According to an embodiment of the present invention for solving the above problem, an address setting unit generating an address code value corresponding to an electrical connection state of each of a plurality of switches, and a plurality of frequencies corresponding to the address code value one-to-many A microprocessor that adds and outputs the operation confirmation voltage to the signal and the output value of the fire detection sensor, and outputs an AC voltage having a plurality of frequency components corresponding one-to-many to the address code value, but applies the operation confirmation voltage to the output value of the fire detection sensor Generates an AC current having a plurality of frequency components, including a voltage-frequency converter that outputs the added value to be reflected in the amplitude of the AC voltage, and a voltage-current converter that drives a current corresponding to the voltage level of the AC voltage to a power line Addressable fire detectors are provided.

According to another embodiment of the present invention, different address code values are set for each fire detector according to an arrangement location and are connected in parallel to each other to a power line, so that each fire detector has one corresponding to its own address code value. A plurality of signals in which an AC component current having a plurality of frequencies corresponding to each other is driven with the power line, and a signal obtained by adding an operation check voltage to the output value of the fire detection sensor allocated thereto is reflected in the amplitude of the AC component current of the address-type fire detector, and the current signal flowing through the power line is detected as a voltage and then subjected to fast Fourier transform to extract the amplitudes for each of the plurality of frequency components, and the average value calculation method or the highest value for the extracted amplitudes for each of the plurality of frequency components Provided is a fire detection system including a fire receiver that determines the output value of a digital or analog fire detection sensor by using an average value calculation method or a mode calculation method or a median value calculation method or a combination of calculation methods excluding the minimum value.

In addition, each of the plurality of address-type fire detectors included in the present invention includes an address setting unit that generates an address code value corresponding to an electrical connection state of each of the plurality of switches, and a plurality of address code values corresponding to the address code value one-to-many. A microprocessor for adding and outputting a frequency signal and an operation confirmation voltage to the output value of the fire detection sensor, and outputting an AC voltage having a plurality of frequency components corresponding to one-to-many address code values, but adding an operation confirmation voltage to the output value of the fire detection sensor It characterized in that it comprises a voltage-frequency converter for outputting the added value to be reflected in the amplitude of the AC voltage, and a voltage-to-current converter for driving a current corresponding to the voltage level of the AC voltage to the power line.

In addition, the fire receiver included in the present invention, when the output value of the fire detection sensor is 0, the noise is 0, and there is only a positive operation confirmation voltage, a plurality of amplitude values for each frequency extracted through fast Fourier transform and the operation confirmation voltage After defining a plurality of frequency-specific correction coefficients in the ratio of For the values obtained by subtracting the amplitude of stars and multiplying the correction factors for each frequency, the average value calculation method, the average value calculation method excluding the highest and lowest values, the mode calculation method, or the median value calculation method or a combination of methods are calculated as insensitive to noise. do.

In addition, the fire receiver included in the present invention utilizes the amplitude and operation check voltage of a plurality of frequency components corresponding to the address of each fire detector one-to-many, and whether each address-type fire detector operates normally, has a failure, and is disconnected. In detecting , the average value or the average value excluding the highest and lowest values of the amplitudes of a plurality of frequency components, or the mode or median value, or the magnitude of the output of the fire detector estimated by a combination of methods is the average value or the highest value of the amplitude spectrum of the operation confirmation voltage, respectively If it is close to or greater than the average value, mode, or median value excluding the value and the minimum value, or the value extracted by a combination of methods, it is judged to be in a normal operation state, and the average value or the average value or mode or median value excluding the average value or the highest and lowest values of the amplitudes for a plurality of extracted frequency components, or If the size of the output of the fire detector estimated by the combination of methods approaches 0, it is judged as a failure or departure. Finally, it is characterized in that it is determined that a disconnection has occurred between the detector of a specific address and the adjacent detector.

The address-type fire detector for generating an alternating current having a plurality of frequency components and a fire detection system including the same according to an embodiment of the present invention can operate using only a power line without the need for additional communication lines. It can be applied to analog fire detectors by generating alternating current with frequency components. In addition, by generating an alternating current having a plurality of frequency components, it is insensitive to noise and operation reliability can be secured.

That is, it is an address-type fire detection system that can be applied regardless of the type of analog or digital fire detection sensor unit. In addition, since the output signal of the fire detection sensor sent by all the fire detectors connected in parallel to the receiver is simultaneously extracted, even if several fire detectors fire an alarm at the same time, it operates normally without any problem.

In addition, since the output value of the fire detection sensor can be accurately calculated, it can be used as an analog-type address-type fire detection system.

In addition, it is possible to know whether the fire detector is in a normal state or a malfunction state.

Also, if the +24[V] power line is disconnected in the middle, the approximate disconnection position can be found.

1 is a view showing a conventional address-type fire detector and fire detection system using a current source
2 is a block diagram of an address-type fire detection system 1 according to an embodiment of the present invention.
3 is a block diagram of an address-type fire detector 100-1 for generating an alternating current having a plurality of frequency components according to an embodiment;
4 is a view showing the shape of the output signal of the fire detection sensor unit;
5 is a detailed configuration diagram of an address-type fire detector that generates an alternating current having a plurality of frequency components of FIG. 3;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings in order to describe in detail enough that a person of ordinary skill in the art to which the present invention pertains can easily implement the technical idea of the present invention.

2 is a block diagram of an address-type fire detection system 1 according to an embodiment of the present invention.

Referring to FIG. 2 , the proposed 'address-type fire detector generating an alternating current having a plurality of frequency components and a fire detection system (1) including the same' is an alternating current in which noise flowing through a +24 [V] power line is mixed. It is an address-type fire detection system insensitive to analog-type noise that analyzes the amplitude spectrum of the current and finds out the address of the fire detector and the temperature or smoke concentration, which are output signals of the fire detection sensor unit.

,

,

,…,

으로 하고, 흐르는 전류의 주파수가 각각

,

,

,…,

인 교류성분의 진폭은 화재감지 센서부의 출력값

에 화재감지기의 정상동작 여부 확인용 값인

을 합한 값인

으로 대응시킨다. 즉, +24[V] 전원선에 흐르는 전류에는, 화재감지기의 주소정보가 복수의 주파수로 내포되어 있고, 화재감지 센서부의 출력정보와 화재감지기의 정상동작 정보는 교류성분의 진폭으로 내포되어 있다. Each of the fire detectors (100- k ) passes an AC current having a DC component and a plurality of frequency components to a +24 [V] power line. In the case of a fire detector at address k , the frequency of the flowing current is a plurality of frequencies corresponding one-to-many to address k of the fire detector.

,

,

,… ,

, and the frequency of the flowing current is

,

,

,… ,

The amplitude of the phosphorus alternating current component is the output value of the fire detection sensor.

is the value for checking whether the fire detector is operating normally.

is the sum of

respond with That is, in the current flowing through the +24 [V] power line, the address information of the fire detector is contained in a plurality of frequencies, and the output information of the fire sensor unit and the normal operation information of the fire detector are contained in the amplitude of the AC component. .

를 전압으로 검출한 후, 고속 푸리에 변환 처리함으로써 +24[V] 전원선에 흐르는 전류 i에 포함된

주파수 성분의 진폭 스펙트럼을 추출한다. 추출한 진폭 스펙트럼은 화재감지기의 주소에 대응하는 주파수 별 진폭이고, 주파수 별 진폭의 크기는 +24[V] 전원선에 흐르는 전류의 교류성분의 진폭과 1대 1로 대응되므로 화재감지 센서부의 출력신호값을 알 수 있다.The receiver 200 is a current mixed with noise flowing in the +24 [V] power line.

After detecting as a voltage, the current i included in the +24[V] power supply line is

Extract the amplitude spectrum of the frequency component. The extracted amplitude spectrum is the amplitude for each frequency corresponding to the address of the fire detector, and the amplitude for each frequency corresponds to the amplitude of the AC component of the +24[V] power line in one-to-one correspondence with the output signal of the fire detection sensor unit. value can be found.

Specifically, it is as follows. The configuration of the proposed address-type fire detector generating alternating current having a plurality of frequency components and a fire detection system including the same is -N), and the address of the fire detector is from 1 to N.

를 검출하여 전압 v_sensing으로 변환하는 기능을 하고, 고속 푸리에 변환부(220)는 입력신호인 v_sensing을 고속 푸리에 변환 처리함으로써 v_sensing에 포함된 주파수

의 성분 별 진폭 스펙트럼

을 추출하는 기능을 하며 고속 푸리에 변환부의 기능은 마이크로 컴퓨에서 소프트웨어 적으로 처리 가능하고, 마이크로 컴퓨터(230)는 입력받은 진폭 스펙트럼

을 기반으로 화재감지기의 주소

에 대응하는 화재감지 센서부의 출력값

의 추정값

를 산출하고 또한 화재감지기의 정상동작 여부 및 화재발생 여부를 판단한다. 디스플레이 모듈(240)은 화재발생 여부와 화재발생 주소, 화재감지 센서부의 출력값, 그리고 화재감지기의 정상동작 여부 등을 표시하는 기능을 한다. 참고적으로 고속 푸리에 변환부(220)는 별도의 전용 하드웨어 칩으로 구성될 수 있다.The receiver 200 includes a current detection unit 210 , a fast Fourier transform unit 220 , a microcomputer 230 , and a display module 240 as shown in FIG. 2 . The current detection unit 210 is a current mixed with noise flowing in the +24 [V] power line.

It detects and converts it into voltage v _sensing , and the fast Fourier transform unit 220 processes the v _sensing , which is an input signal, by fast Fourier transform to the frequency included in v _sensing .

component-specific amplitude spectrum of

The function of the fast Fourier transform unit can be processed by software in the microcomputer, and the microcomputer 230 is the input amplitude spectrum.

Based on the address of the fire detector

The output value of the fire detection sensor corresponding to

estimate of

It calculates whether the fire detector is operating normally and whether a fire has occurred. The display module 240 functions to display whether or not a fire has occurred, the address of the fire, an output value of the fire detection sensor unit, and whether the fire detector is operating normally. For reference, the fast Fourier transform unit 220 may be configured as a separate dedicated hardware chip.

3 is a block diagram of an address-type fire detector 100-1 for generating an alternating current having a plurality of frequency components according to an embodiment.

For reference, f _k output from the microprocessor 120 in this embodiment is preferably in the range of 1 Hz to 300 Hz frequency.

The fire detector 100-1 is “address-type fire detection that generates an alternating current having a plurality of frequency components” as shown in FIG. 3 , and includes an address setting unit 110 , a fire detection sensor unit 150 , and an analog-to-digital converter is composed of a microprocessor 120 , a voltage frequency converter 130 , and a voltage current converter 140 .

를 출력하는 기능을 하고, 마이크로프로세서(120)는 병렬포트로 받아들인 화재감지기의 주소 k와 1대 다로 대응되는 복수의 주파수 값

,

,

,…,

과 내장된 아날로그 디지털 변환기를 통하여 받아들인 화재 감지 센서부(150)의 출력값

에 화재감지기의 정상동작 여부 확인용 값인

을 부가한 값

을 α배한 값

을 전압 주파수 변환부(130)로 출력하는 기능을 하고, 전압 주파수 변환부(140)는 입력신호인

,

,

,…,

과

의 값에 대응하는 복수의 주파수 성분을 갖는 교류전압

를 출력하는 기능을 하고, 전압 전류 변환부는 입력전압

에 대응하는 교류전류가 +24[V] 전원선에 흐르게 하는 기능을 한다. The address setting unit 110 functions to set the address of the fire detector to k , and the fire detection sensor unit 150 converts sensor signals such as temperature sensors and smoke sensors into voltage signals or amplified voltage signals.

, and the microprocessor 120 has a plurality of frequency values corresponding one-to-many with the address k of the fire detector received through the parallel port.

,

,

,… ,

and the output value of the fire detection sensor unit 150 received through the built-in analog-to-digital converter

is the value for checking whether the fire detector is operating normally.

added value

multiplied by α

functions to output to the voltage frequency converter 130, and the voltage frequency converter 140 is an input signal

,

,

,… ,

class

AC voltage having a plurality of frequency components corresponding to the values of

has a function of outputting , and the voltage-to-current converter

It functions to allow AC current corresponding to +24[V] to flow through the power line.

Description of the operation principle of a fire detector

라고 하고 설명한다. 3 of the “AC current generating address type fire detector having a plurality of frequency components” In the configuration diagram”, the address of the fire detector is set to number k with the dip switch in the address setting unit, and the output signal of the fire detection sensor unit is

and explain.

화재감지 센서가 온도 센서이면 x 는 온도에 대응하는 전압 값이고, 연기 센서이면 x는 연기농도에 대응하는 전압 값이다. The output signal of the fire detection sensor

If the fire sensor is a temperature sensor, x is a voltage value corresponding to the temperature, and if the smoke sensor is a smoke sensor, x is a voltage value corresponding to the smoke concentration.

4 is a view showing the form of an output signal of the fire detection sensor unit.

의 형태는 도면 4와 같이 아날로그 형, 3단 디지털 신호 형, On/Off 형의 3가지 형태의 신호이다.The output signal of the fire detection sensor

As shown in FIG. 4 , the form of is a signal of three types: an analog type, a three-stage digital signal type, and an On/Off type.

,

,

,…,

과 화재 감지 센서부(150)의 출력값

에 화재감지기의 정상동작 여부 확인용 값인

을 부가한 값

을 α배한 값

을 전압 주파수 변환부로 출력한다.The microprocessor 120 has a plurality of frequency values corresponding one-to-many to the address k of the fire detector.

,

,

,… ,

and the output value of the fire detection sensor unit 150

is the value for checking whether the fire detector is operating normally.

added value

multiplied by α

is output to the voltage frequency converter.

,

,

,…,

과

을 입력받아 식 (1)과 같은 직류성분이 있는 교류전압

를 출력한다. 여기서, m은 통상적으로 2내지 5이다.Voltage and frequency converter (Voltage and Frequency converter)

,

,

,… ,

class

AC voltage with DC component as in Equation (1)

to output Here, m is typically 2 to 5.

<Equation 1>

는

의 최소값에 절대치를 취한 값이다. In formula (1),

Is

It is a value obtained by taking the absolute value of the minimum value of

The voltage-to-current converting circuit (Voltage to Current Converting Circuit) is a circuit that converts voltage into current, and allows the voltage of Equation (1) to flow through the current i _k as in Equation (2) to the +24[V] power line.

<Equation 2>

,

,

,…,

과 화재 감지 센서부의 출력값

를 내포한 식 (2)의 전류 i _k 가 +24[V] 전원선에 흐르게 한다. 화재감지기의 주소 k는 교류전류 i _k 의 주파수

,

,

,…,

로 대응시키고, 화재 감지 센서부의 출력값

에 화재감지기의 동작여부 확인 용인

신호를 부가한 값을 α배한 값

은 전류 i _k 의 교류성분들의 진폭

으로 대응시켜 +24[V] 전원선에 교류전류 i _k 가 흐르게 한다. That is, the fire detector at address k has a plurality of frequencies corresponding to its address k one-to-many.

,

,

,… ,

and the output value of the fire detection sensor

Let the current i _k in Equation (2) containing The address k of the fire detector is the frequency of the alternating current i _k

,

,

,… ,

and the output value of the fire detection sensor

Check whether the fire detector is working in

The value multiplied by the signal added value by α

is the amplitude of the alternating current components of the current i _k

AC current i _k flows through the +24[V] power line.

Description of receiver operation

In the receiver of the proposed figure 2,

와 외부 요인에 의한 노이즈 전류

가 흐르므로, +24[V] 전원선에 흐르는 전류 i는

이고 전류 i를 검출저항

을 통하여 검출한 전압값

은 다음의 식 (3)과 같다. The current detector detects the current flowing in the +24[V] power line. +24[V] current flowing through the fire detector in the power line

and noise current caused by external factors

flows, so the current i flowing through the +24[V] power line is

and the current i is the sensing resistor

voltage value detected through

is the following equation (3).

<Equation 3>

이다.In formula (3),

to be.

성분의 진폭 스펙트럼

을 출력하며, 출력된 진폭 스펙트럼

와

사이의 관계는 다음의 식 (4)와 같다.The Fast Fourier Transform part converts the input signal of Equation (3) into a frequency by fast Fourier transform.

the amplitude spectrum of the component

output the output amplitude spectrum

Wow

The relationship between them is as the following equation (4).

<Equation 4>

의 주요 요인은 노이즈와 고속 푸리에 변환부의 오차이다. In Equation (4), the approximate equal sign

The main factors are noise and the error of the fast Fourier transform part.

microcomputer amplitude spectrum

을 입력받아 k번 주소의 화재감지 센서부의 출력값

의 추정값

를 다음과 같이 산출한다.

is the output value of the fire detection sensor unit at address k

estimate of

is calculated as follows.

의 추정값

은 다음의 식 (5)와 같다.From Equation (4), for the fire detector at address k

estimate of

is the same as the following equation (5).

<Equation 5>

이고

이어서

만 있을 때 고속 푸리에 변환부에서 추출한

주파수 성분의 진폭 스펙트럼

를

이라 하면, 다음의 식 (6)으로 정의한

는 이 때에 고속 푸리에 변환 시 발생하는 오차로서 중요한 의미를 갖는다.

ego

next

Extracted from the fast Fourier transform unit when there is

Amplitude spectrum of frequency components

cast

, defined by the following formula (6)

At this time, it has an important meaning as an error occurring during the fast Fourier transform.

<Equation 6>

이도록 하면 고속 푸리에 변환으로 인한 오차가 작으므로

이며 식 (5)를 활용하여

의 추정값

를 산출할 수 있으나, 메모리 양이 많이 필요하고 고속 푸리에 변환 시간이 길어진다. 메모리 크기와 변환 시간의 제약으로 샘플링 시간과 데이터 양을 줄이면

이므로 고속 푸리에 변환부에서 추출한

주파수 성분의 진폭 스펙트럼

를 보정하여

를 산출하는 것이 바람직하다.In Equation (6), when the fast Fourier transform is performed, the sampling frequency is made large enough and a large amount of data is used.

Since the error due to the fast Fourier transform is small,

and using Equation (5)

estimate of

, but a large amount of memory is required and the fast Fourier transform time becomes long. Reducing the sampling time and data amount due to the limitations of memory size and conversion time

Therefore, the fast Fourier transform

Amplitude spectrum of frequency components

by correcting

It is preferable to calculate

이고

이며

만 있을 때, 고속 푸리에 변환부에서 추출한

주파수 성분의 진폭 스펙트럼

를 The correction of the amplitude spectrum for correcting the error caused by the fast Fourier transform is as follows. in equation (4)

ego

is

, extracted from the fast Fourier transform unit

Amplitude spectrum of frequency components

cast

이라 하면 식 (4)로부터

,

이도록 보정 계수

를 다음의 식 (7)로 정의한다.

From Equation (4),

,

correction factor to be

is defined by the following formula (7).

<Equation 7>

는 노이즈가 0이고 화재감지 센서부의 출력이 0일 때 고속 푸리에 변환부에서 추출한

주파수 성분의 진폭 스펙트럼

과

의 비율이며, 보정 계수

를 사용하여 식 (5)를 표현하면 다음의 식 (8)과 같이 표현된다. correction factor

is the value extracted from the fast Fourier transform unit when the noise is 0 and the output of the fire detection sensor unit is 0.

Amplitude spectrum of frequency components

class

is the ratio of the correction factor

If Equation (5) is expressed using

<Equation 8>

이면,

를 추정한 값

는 위의 식 (8)로부터 다음의 식 (9)와 같다.

this side,

estimated value

is from the above equation (8) to the following equation (9).

<Equation 9>

번인 화재감지기의 출력값

의 추정값

는 고속 푸리 변환 결과를 보정하지 않고

를 산출할 수도 있고, 보정한 결과를 가지고

를 산출할 수 있으며, 각각의 산출과정에는 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법 또는 이들 3가지 방법의 조합을 활용할 수 있고, 어느 방법을 채택할 지는 화재감지 센서부의 출력 형식에 따라 다를 수 있다.address is

Output value of burn-in smoke detector

estimate of

without correcting the fast Fourier transform result

can be calculated, and with the corrected result

can be calculated, and the average value calculation method, the mode calculation method, the median value calculation method, or a combination of these three methods can be used in each calculation process, and the method to be adopted may differ depending on the output format of the fire detection sensor unit. have.

를 산출하는 경우 (1) based on the uncorrected fast Fourier transform results

When calculating

의 추정값

를 식 (5)를 기반으로 다음과 같이 3가지 방법으로 산출할 수 있다.Output value of fire detector with address k

estimate of

can be calculated in the following three ways based on Equation (5).

의 추정값

를 다음의 식 (10)과 같이

의 산술 평균값으로 산출함으로써 노이즈의 등의 영향을 줄이는 방법이며,

가 디지털 형이든 아날로그 형이든 모두에 적용 가능하다.The first method is the average value calculation method, which is calculated as follows from Equation (5).

estimate of

as in the following equation (10)

It is a method of reducing the influence of noise by calculating the arithmetic mean value of

It is applicable to both digital type and analog type.

<Equation 10>

이고

만 있을 때, 고속 푸리에 변환부에서 추출한

주파수 성분의 진폭 스펙트럼

를

라 하면

의 추정값

는 식 (10)으로부터 다음의 식 (11)과 같이 평균값으로 산출한다.in equation (10)

ego

, extracted from the fast Fourier transform unit

Amplitude spectrum of frequency components

cast

If you say

estimate of

is calculated as an average value from Equation (10) as shown in Equation (11) below.

<Equation 11>

의 추정값

는 다음의 식 (12)와 같이 평균값으로 산출할 수 있다.Therefore, the output value of the fire detection sensor unit at address k

estimate of

can be calculated as an average value as in the following equation (12).

<Equation 12>

에 대하여는 적용할 수 있는 최빈값 산출 방법으로,

The second method is digital

As a mode calculation method that can be applied to

중에서 V_비경보에 근접한 개수가 가장 많으면

로 판단하고, V_주의에 근접한 개수가 가장 많으면

로 판단하고, V_경보에 근접한 개수가 가장 많으면

로 판단하는 방법이다.

Among them, if the number closest to V _non-alarm is the largest,

Judging by , if the number closest to V _is the largest,

If it is judged as and the number close to V _alarm is the largest,

as a way to judge.

의 중앙값을

이라하고,

의 중앙값을

이라고 하면

으로 판단하는 중앙값 산출 방법이다.the third way

the median of

say,

the median of

If you say

It is a method of calculating the median value determined by .

를 산출하는 경우 (2) based on the corrected fast Fourier transform result

When calculating

의 추정값

를 식 (9)를 기반으로 다음과 같이 3가지 방법으로 산출할 수 있다. Output value of fire detector with address k

estimate of

can be calculated in the following three ways based on Equation (9).

의 추정값

를 다음의 식 (13)과 같이 평균값으로 산출함으로써 노이즈 등의 영향을 줄이는 방법이며,

가 디지털 형이든 아날로그 형이든 모두에 적용 가능하다.The first method is the average value calculation method, using Equation (9) to

estimate of

is a method of reducing the influence of noise by calculating as an average value as in the following equation (13)

It is applicable to both digital type and analog type.

<Equation 13>

에 대하여는 적용할 수 있는 최빈값 산출 방법으로,

The second method is digital

As a mode calculation method that can be applied to

중에서 V_비경보에 근접한 개수가 가장 많으면

로 판단하고, V_주의에 근접한 개수가 가장 많으면

로 판단하고, V_경보에 근접한 개수가 가장 많으면

로 판단하는 방법이다.

Among them, if the number closest to V _non-alarm is the largest,

Judging by , if the number closest to V _is the largest,

If it is judged as and the number close to V _alarm is the largest,

as a way to judge.

the third way

중에서 중앙값을

이라고 하면

으로 판단하는 중앙값 산출 방법이다.

of the median

If you say

It is a method of calculating the median value determined by .

를 산출할 수 있으며, 주요 특징은 다음과 같다.The output value of the fire detection sensor unit at address k by applying one of the above three methods or a combination of three methods

can be calculated, and the main features are as follows.

(Feature 1) Insensitive to noise caused by external factors flowing through the +24V power line.

,

,

,…,

로 대응시키고 화재감지 센서부의 출력

는 각 주파수

,

,

,…,

성분의 진폭으로 대응시키고, 수신기에서 k번 주소의 화재감지 센서부의 출력값

의 추정값

는 고속 푸리에 변환으로 추출한 진폭 스펙트럼

을 기반으로 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법으로 산출한다. 따라서, 화재감지기의 주소 k를 1대 1의 주파수 값 f _k 로 대응시키고 화재감지 센서부의 출력

는 주파수 f _k 성분의 진폭으로 대응시키고, 수신기에서 k번 주소의 화재감지 센서부의 출력값

의 추정값

는 1개의 진폭 스펙트럼

만을 기반으로 산출하는 방법에 비하여 에일리어싱(aliasing) 현상에 둔감하고 +24V 전원선에 흐르는 특정 주파수 성분을 갖는 노이즈에 둔감한 주소형 화재감지 시스템이라 할 수 있다.The address k of the fire detector is one-to-many multiple frequency values.

,

,

,… ,

and the output of the fire detection sensor

is each frequency

,

,

,… ,

It corresponds to the amplitude of the component, and the output value of the fire detection sensor unit at address k in the receiver

estimate of

is the amplitude spectrum extracted by fast Fourier transform

based on the average value calculation method, the mode calculation method, or the median value calculation method. Therefore, the address k of the fire detector is matched with a frequency value f _k of one to one, and the output of the fire detection sensor unit is

corresponds to the amplitude of the frequency f _k component, and the output value of the fire detection sensor at address k in the receiver

estimate of

is one amplitude spectrum

It can be said that it is an address-type fire detection system insensitive to the aliasing phenomenon and insensitive to noise having a specific frequency component flowing through the +24V power line compared to the calculation method based on the

(Feature 2) It is possible to know whether the fire detector is in a normal state or a malfunction state.

는

이므로,

값은 식 (14)를 만족시켜야 한다.If the fire detector at address k is in a normal operating state, not a malfunction, the output of the fire detection sensor unit

Is

Because of,

The value must satisfy Equation (14).

<Equation 14>

에 대하여 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법으로 k번 주소의 화재감지 센서부의 출력값

의 추정값

를 산출하면 식 (11)의

값에 근접하거나 큰 값이므로,

값이

값에 근접하거나 큰 값이면 k번 주소의 화재감지기는 정상적인 동작상태에 있다고 판단할 수 있다. 다시 말하면,

의 평균값 또는 최빈값 또는 중앙값이 각각

의 평균값 또는 최빈값 또는 중앙값에 근접하거나 큰 값이면 k번 주소의 화재감지기는 정상적인 동작상태에 있다고 판단할 수 있다. 보상한 진폭 스펙트럼을 사용할 경우에는

의 평균값 또는 최빈값 또는 중앙값이 각각

의 평균값 또는 최빈값 또는 중앙값에 근접하거나 큰 값이면 k번 주소의 화재감지기는 정상적인 동작상태에 있다고 판단할 수 있다. thus,

The output value of the fire detection sensor unit at address k by the average value calculation method, the mode calculation method, or the median value calculation method for

estimate of

If we calculate , the equation (11)

Because it is close to or greater than the value,

value

If the value is close to or larger than the value, it can be determined that the fire detector at address k is in a normal operating state. In other words,

is the mean or mode or median of

If the value is close to or greater than the average or mode or median of When using a compensated amplitude spectrum,

is the mean or mode or median of

If the value is close to or greater than the average or mode or median of

으로 인식하므로, 고속 푸리에 변환 결과는 노이즈와 고속 푸리에 변환부의 오차에 기인한 결과이며 출력되는 진폭 스펙트럼은

이다. On the other hand, if the fire detector at address k is in a faulty state or is released, the receiver

Therefore, the fast Fourier transform result is a result of noise and the error of the fast Fourier transform unit, and the output amplitude spectrum is

to be.

에 대하여 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법으로 산출한 값이 0에 근접하면 k번 주소의 화재감지기는 고장상태거나 이탈된 것으로 판단할 수 있다. 보상한 진폭 스펙트럼을 사용할 경우에는

의 평균값 또는 최빈값 또는 중앙값이 0에 근접하면 k번 주소의 화재감지기는 고장상태거나 이탈된 것으로 판단할 수 있다. thus,

When the value calculated by the average value calculation method, the mode value calculation method, or the median value calculation method is close to 0, it can be determined that the fire detector at address k is in a broken state or is out of order. When using a compensated amplitude spectrum,

When the average value, mode, or median value of is close to 0, it can be determined that the fire detector at address k is in a broken state or is out of order.

과 동작확인전압의 진폭 스펙트럼

을 활용하거나, 보상한 진폭 스펙트럼

과 보상한 동작확인전압의 진폭 스펙트럼

을 활용하여 k번 주소의 화재감지기가 정상적 동작상태에 있는 지 또는 고장상태이거나 이탈상태인 지를 알 수 있다.That is, the amplitude spectrum for each frequency component extracted from the receiver

Amplitude spectrum of operation check voltage

using or compensated amplitude spectrum

Amplitude spectrum of operation check voltage compensated with

It is possible to know whether the fire detector at address k is in a normal operating state, in a faulty state, or in a broken state by using

(Feature 3) If the +24[V] power line is disconnected in the middle, the approximate position of the disconnection is known.

으로 인식하므로 수신기에서 추출한

주파수 성분의 진폭

는 식 15와 같다.If the +24[V] power line is disconnected between the k fire detector and the k+1 fire detector, the receiver

As it is recognized as , the receiver extracts

the amplitude of the frequency component

is the same as Equation 15.

<Equation 15>

의 평균값 또는 최빈값 또는 중앙값은 각각 동작확인전압의 진폭 스펙트럼

의 평균값 또는 최빈값 또는 중앙값에 근접한 값이거나 큰 값이어서

번 화재감지기는 정상동작 상태이고, 동시에 j=k+1 번부터 j=N 번까지에 대하여

의 평균값 또는 최빈값 또는 중앙값이 0에 근접하면 k번 주소의 화재감지기와 k+1번 주소의 화재감지기 사이에서 단선이 발생한 것으로 판단할 수 있다.Therefore, the receiver extracts

The average or mode or median of the amplitude spectrum of the operation confirmation voltage, respectively

value close to or greater than the mean or mode or median of

Fire detector No. is in normal operation, and at the same time, for No. j=k+1 to No. j=N

When the average or mode or median of is close to 0, it can be determined that a disconnection has occurred between the fire detector at address k and the fire detector at address k+1 .

(Composition of receiver and description of function by part)

The proposed receiver is composed of a current detector, a fast Fourier transform unit, a microcomputer, and a display module as shown in FIG. 2 .

를 검출하여 식 (3)의 전압 으로 변환하는 기능을 하고, 고속 푸리에 변환부는 입력신호인

을 고속 푸리에 변환 처리함으로써

에 포함된 진폭 스펙트럼

을 추출하는 기능을 하며 고속 푸리에 변환부의 기능은 마이크로 컴퓨터에서 소프트웨어 적으로 처리 가능하고, 마이크로 컴퓨터는 입력받은 Current detection unit +24[V] current flowing through the power line

It detects and converts it into the voltage of Equation (3), and the fast Fourier transform unit

By fast Fourier transform processing

amplitude spectrum contained in

The function of the fast Fourier transform part can be processed by software in the microcomputer, and the microcomputer receives the input

을 기반으로 주소가

인 화재감지기에 대하여 화재감지 센서부의 출력값

을 평균 값 산출 방법 또는 최빈값 산출 방법 또는 중앙값 산출 방법으로 산출하고 또한 화재감지기의 정상동작 여부 및 화재발생 여부를 판단한다. 디스플레이 모듈은 화재발생 여부와 화재발생 주소, 화개감지 센서부의 출력값, 그리고 화재감지기의 정상동작 여부 등을 표시하는 기능을 한다.amplitude spectrum

address based on

Output value of fire detection sensor for phosphorus fire detector

is calculated by the average value calculation method, the mode calculation method, or the median value calculation method, and it is determined whether the fire detector is operating normally and whether a fire has occurred. The display module functions to display whether or not a fire has occurred, the address of the fire, the output value of the fire detection sensor unit, and whether the fire detector is operating normally.

(Description of the composition and function of each part of the fire detector)

The configuration diagram of the proposed “AC current generation address-type fire detector having a plurality of frequency components” is shown in Fig. 3, and a microprocessor having an address setting unit, a fire detection sensor unit, and an analog-to-digital converter (ADC). , a Voltage and Frequency converter, and a Voltage to Current Converting circuit.

를 출력하는 기능을 한다. In FIG. 3, the address setting unit is composed of a dip switch and resistors, and the dip switch functions to set the address of the fire detector to k , and the set address k is input to the microprocessor. The fire detection sensor unit consists of sensors such as temperature sensors and smoke sensors, and a circuit that converts or amplifies the signals of the sensors into voltage signals, and the fire detection sensor unit consists of voltage signals.

function to output

,

,

,…,

과 내장된 아날로그 디지털 변환기를 통하여 받아들인 화재 감지 센서부의 출력값

에 화재감지기의 정상동작 여부 확인용 값인

을 부가한 값

을 α배한 값

를 전압 주파수 변환부로 출력하는 기능을 한다. In FIG. 3, the microprocessor has a plurality of frequency values corresponding one-to-many to the address k of the fire detector received through the parallel port.

,

,

,… ,

and the output value of the fire detection sensor received through the built-in analog-to-digital converter

is the value for checking whether the fire detector is operating normally.

added value

multiplied by α

It functions to output the voltage to the frequency converter.

,

,

,…,

과

의 값에 대응하는 식 (1)의 직류성분이 있는 교류전압 신호

를 출력하는 기능을 한다. In Figure 3, the voltage and frequency converter (Voltage and Frequency converter) is an input signal

,

,

,… ,

class

AC voltage signal with the DC component of Equation (1) corresponding to the value of

function to output

에 대응하는 식 (2)의 전류가 +24[V] 전원선에 흐르게 하는 기능을 한다. In Figure 3, the voltage-to-current converting unit (Voltage to Current Converting circuit) is the input voltage of Equation (1)

It functions to allow the current of Equation (2) corresponding to +24[V] to flow through the power line.

FIG. 5 is a detailed configuration diagram of an address-type fire detector that generates an alternating current having a plurality of frequency components of FIG. 3 .

Referring to FIG. 5 , the address setting unit is composed of a dip switch and resistors, and the dip switch functions to set the address of the fire detector to k , and the set address k is the CPU through the input parallel port of the microprocessor. is sent to For example, if the dip switch is set to 00000001 ₂ , the address k of the fire detector is 1 in decimal.

를 출력하는 기능을 한다.The fire detection sensor unit converts the output signals of sensors such as temperature sensors and smoke sensors into voltage signals or amplified voltage signals.

function to output

와 1대 다로 대응되는 주파수 값

,

,

,…,

과 내장된 아날로그 디지털 변환기(Analog to Digital converter)를 통하여 받아들인 화재감지 센서부의 출력값

에 화재감지기의 정상동작 여부 확인용 값인

을 부가한 값

을 α배한 값

을 전압 주파수 변환부로 출력하는 기능을 한다. The microprocessor accepts the address of the fire detector through the parallel port.

and one-to-many corresponding frequency values

,

,

,… ,

and the output value of the fire detection sensor received through the built-in Analog to Digital converter

is the value for checking whether the fire detector is operating normally.

added value

multiplied by α

It functions to output the voltage to the frequency converter.

,

,

,…,

과

의 값에 대응하는 식 (1)의 교류전압

를 출력하는 기능을 한다. Voltage and frequency converter is the input signal

,

,

,… ,

class

AC voltage in equation (1) corresponding to the value of

function to output

에 대응하는 식 (2)의 교류전류 i _k 가 +24[V] 전원선에 흐르게 하는 기능을 한다.Voltage-to-Current Converting circuit (Voltage-to-Current Converting circuit)

It functions to allow the AC current i _k of Equation (2) corresponding to +24[V] to flow through the power line.

(Advantages of the proposed method)

The proposed 'address-type fire detector generating alternating current having a plurality of frequency components and a fire detection system including the same' is It is an analog type address-type fire detection system that finds out the address of the detector and the output signal of the fire detection sensor, such as temperature or smoke concentration, and has the following advantages.

(Advantage 1) Insensitive to noise caused by external factors flowing through the +24V power line.

,

,

,…,

로 대응시키고 화재감지 센서부의 출력

는 각 주파수

,

,

,…,

성분의 진폭으로 대응시키고, 수신기에서 k주소의 화재감지 센서부의 출력값

의 추정값

는 고속 푸리에 변환으로 추출한 진폭 스펙트럼

,

,

,…,

을 기반으로 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법으로 산출한다. 따라서, 화재감지기의 주소 k를 1대 1의 주파수 값 f _k 로 대응시키고 화재감지 센서부의 출력

는 주파수 f _k 성분의 진폭으로 대응시키고, 수신기에서 k번 주소의 화재감지 센서부의 출력값

의 추정값

는 1개의 진폭 스펙트럼

만을 기반으로 산출하는 방법과 비교하여 에일리어싱(aliasing) 현상에 둔감하고 +24V 전원선에 흐르는 특정 주파수 성분을 갖는 노이즈에 둔감한 주소형 화재감지 시스템이라 할 수 있다. The address k of the fire detector is one-to-many multiple frequency values.

,

,

,… ,

and the output of the fire detection sensor

is each frequency

,

,

,… ,

It corresponds to the amplitude of the component, and the output value of the fire detection sensor unit at address k in the receiver

estimate of

is the amplitude spectrum extracted by fast Fourier transform

,

,

,… ,

based on the average value calculation method, the mode calculation method, or the median value calculation method. Therefore, the address k of the fire detector is matched with a frequency value f _k of one to one, and the output of the fire detection sensor unit is

corresponds to the amplitude of the frequency f _k component, and the output value of the fire detection sensor at address k in the receiver

estimate of

is one amplitude spectrum

It can be said that it is an address-type fire detection system that is insensitive to aliasing and noise having a specific frequency component flowing through the +24V power line compared to the calculation method based on the

(Advantage 2) It is possible to know whether the fire detector is in a normal or malfunctioning state.

의 평균값 또는 최빈값 또는 중앙값이 각각

의 평균값 또는 최빈값 또는 중앙값에 근접하거나 큰 값이므로 k번 주소의 화재감지기는 정상적인 동작상태에 있다고 판단할 수 있다. 보상한 진폭 스펙트럼을 사용할 경우에는

의 평균값 또는 최빈값 또는 중앙값이 각각

의 평균값 또는 최빈값 또는 중앙값에 근접하거나 큰 값이면 k번 주소의 화재감지기는 정상적인 동작상태에 있다고 판단할 수 있다.If the fire detector at address k is in a normal operating state, not a malfunction,

is the mean or mode or median of

It can be judged that the fire detector at address k is in a normal operating state because it is close to or larger than the average or mode or median of . When using a compensated amplitude spectrum,

is the mean or mode or median of

If the value is close to or greater than the average or mode or median of

으로 인식하므로, 고속 푸리에 변환 결과는 노이즈와 고속 푸리에 변환부의 오차에 기인한 결과이며 출력되는 진폭 스펙트럼은

이다. On the other hand, if the fire detector at address k is in a faulty state or is released, the receiver

Therefore, the fast Fourier transform result is a result of noise and the error of the fast Fourier transform unit, and the output amplitude spectrum is

to be.

에 대하여 평균값 산출방법 또는 최빈값 산출방법 또는 중앙값 산출방법으로 산출한 값은 0에 근접하고, 산출한 값이 0에 근접하면 k번 주소의 화재감지기는 고장상태거나 이탈된 것으로 판단할 수 있다. 보상한 진폭 스펙트럼을 사용할 경우에는

의 평균값 또는 최빈값 또는 중앙값이 0에 근접하면 k번 주소의 화재감지기는 고장상태거나 이탈된 것으로 판단할 수 있다. thus,

The value calculated by the average value calculation method, the mode calculation method, or the median value calculation method for When using a compensated amplitude spectrum,

When the average value, mode, or median value of is close to 0, it can be determined that the fire detector at address k is in a broken state or is out of order.

과 동작확인전압의 진폭 스펙트럼

을 활용하거나, 보상한 진폭 스펙트럼

과 보상한 동작확인전압의 진폭 스펙트럼

을 활용하여 k번 주소의 화재감지기가 정상적 동작상태에 있는 지 또는 고장상태이거나 이탈상태인 지를 알 수 있다.That is, the amplitude spectrum for each frequency component extracted from the receiver

Amplitude spectrum of operation check voltage

using or compensated amplitude spectrum

Amplitude spectrum of operation check voltage compensated with

It is possible to know whether the fire detector at address k is in a normal operating state, in a faulty state, or in a broken state by using

(Advantage 3) If the +24[V] power line is disconnected in the middle, the approximate position of the disconnection can be known.

으로 인식하므로 수신기에서 추출한

주파수 성분의 진폭

이다. If the +24[V] power line is disconnected between the k fire detector and the k+1 fire detector, the receiver

As it is recognized as , the receiver extracts

the amplitude of the frequency component

to be.

의 평균값 또는 최빈값 또는 중앙값은 각각 동작확인전압의 진폭 스펙트럼

의 평균값 또는 최빈값 또는 중앙값에 근접한 값이거나 큰 값이어서 k번 화재감지기는 정상동작 상태이고, 동시에 j=k+1 번부터 j=N 번까지에 대하여

의 평균값 또는 최빈값 또는 중앙값이 0에 근접하면 k번 주소의 화재감지기와 k+1번 주소의 화재감지기 사이에서 단선이 발생한 것으로 판단할 수 있다.Therefore, the receiver extracts

The average or mode or median of the amplitude spectrum of the operation confirmation voltage, respectively

Because it is a value close to or larger than the average or mode or median of

When the average or mode or median of is close to 0, it can be determined that a disconnection has occurred between the fire detector at address k and the fire detector at address k+1 .

(Advantage 4) Since the output value of the fire detection sensor can be calculated regardless of the format of the output value of the fire detection sensor, it can be used as a digital or analog address-type fire detection system.

(Advantage 5) Since output signals from all fire detectors connected in parallel to the receiver are simultaneously extracted, it operates normally without any problem even if several fire detectors fire an alarm at the same time.

As described above, the address-type fire detector that generates an alternating current having a plurality of frequency components includes an address setting unit that generates an address code value corresponding to an electrical connection state of each of a plurality of switches, and one-to-many address code values A microprocessor for adding and outputting a plurality of frequency signals and an operation confirmation voltage to the output value of the fire detection sensor, and outputting an AC voltage having the plurality of frequency components corresponding one-to-many to an address code value, but It includes a voltage-frequency converter for outputting a value obtained by adding the operation check voltage to the output value to be reflected in the amplitude of the AC voltage, and a voltage-to-current converter for driving a current corresponding to the voltage level of the AC voltage to the power line.

In addition, in the fire detection system, different address code values are set according to the places where they are arranged and they are connected to each other in parallel to the power line. A plurality of address-type fire detectors in which an AC component current is driven by the power line, and a signal obtained by adding an operation check voltage to the output value of the fire detection sensor assigned to it is reflected in the amplitude of the AC component current; After detecting a flowing current signal as a voltage, fast Fourier transform is performed to extract the amplitudes for a plurality of frequency components, and the average value calculation method or the average value calculation method except for the highest and lowest values or the mode calculation method for the extracted amplitudes for the plurality of frequency components Alternatively, a fire receiver for determining the output value of a digital or analog fire detection sensor by using a median value calculation method or a combination of calculation methods is provided.

In the fire detection system, a plurality of address-type fire detectors are each,

An address setting unit that generates an address code value corresponding to the electrical connection state of each of a plurality of switches, a plurality of frequency signals corresponding one-to-many to the address code value, and an operation confirmation voltage are added to the output value of the fire detection sensor and output a microprocessor that outputs an AC voltage having a plurality of frequency components corresponding one-to-many to an address code value, and outputs a value obtained by adding an operation check voltage to the output value of the fire detection sensor to be reflected in the amplitude of the AC voltage It includes a frequency converter and a voltage-current converter for driving a current corresponding to the voltage level of the AC voltage to the power line.

In addition, in the fire detection system, when the output value of the fire detection sensor is 0, the noise is 0, and there is only a positive operation confirmation voltage, the ratio of the amplitude values for each frequency extracted through the fast Fourier transform and the operation confirmation voltage to define a plurality of frequency-specific correction coefficients, and the estimated value of the output value of each fire detection sensor after finding out the plurality of frequency-specific correction coefficients is for each of the plurality of frequencies when there is only the operation confirmation voltage from the extracted amplitudes for each frequency. It is characterized in that it is insensitive to noise by calculating the values obtained by multiplying the amplitude minus the amplitude by the correction factor for each frequency by the average value calculation method, the average value calculation method excluding the highest and lowest values, the mode calculation method, or the median value calculation method or a combination of methods .

In addition, in the fire detection system, the fire receiver utilizes the amplitude and operation check voltage of a plurality of frequency components corresponding one-to-many to the address of each fire detector to determine the normal operation, failure or disconnection of each address-type fire detector. In detecting,

The average value of the amplitude of each frequency component or the average value excluding the highest and lowest values, or the mode or median value, or the size of the output of the fire detector estimated by a combination of methods, is the average value or the highest and lowest values of the amplitude spectrum of the operation confirmation voltage, respectively, except the average value or the highest and lowest values. If it is close to or greater than the average value, the mode value, the median value, or a value extracted by a combination of methods, it is judged to be in a normal operating state,

If the amplitude of the extracted plurality of frequency components or the average value excluding the highest and lowest values or the mode or median value or the size of the output of the fire detector estimated by a combination of methods approaches 0, it is judged as a failure or departure;

When it is determined that the detector of a specific address is in a normal operating state, and all detectors after the specific address are determined to be malfunctioning or departing, it is finally determined that a disconnection has occurred between the detector of the specific address and the neighboring detector.

The address-type fire detector for generating an alternating current having a plurality of frequency components and a fire detection system including the same according to an embodiment of the present invention can operate using only a power line without the need for additional communication lines. It can be applied to analog fire detectors by generating alternating current with frequency components. In addition, by generating an alternating current having a plurality of frequency components, it is insensitive to noise and operation reliability can be secured.

That is, it is an address-type fire detection system that can be applied regardless of the type of analog or digital fire detection sensor unit. In addition, since the output signal of the fire detection sensor sent by all the fire detectors connected in parallel to the receiver is simultaneously extracted, even if several fire detectors fire an alarm at the same time, it operates normally without any problem.

In addition, since the output value of the fire detection sensor can be accurately calculated, it can be used as an analog-type address-type fire detection system.

In addition, it is possible to know whether the fire detector is in a normal state or a malfunction state.

Also, if the +24[V] power line is disconnected in the middle, the approximate disconnection position can be found.

As such, those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

110: address setting unit
120: microprocessor
130: voltage frequency converter
140: voltage current conversion unit
150: fire detection sensor unit
200: receiver
210: current detection unit
220: fast Fourier transform unit
230: microcomputer
240: display module

Claims (5)

an address setting unit generating an address code value corresponding to an electrical connection state of each of the plurality of switches;
a microprocessor for outputting a plurality of frequency signals corresponding to the address code value one-to-many and outputting an operation check voltage to an output value of the fire detection sensor;
Voltage frequency for outputting an AC voltage having the plurality of frequency components corresponding to the address code value one-to-many, and outputting a value obtained by adding the operation confirmation voltage to the output value of the fire detection sensor to be reflected in the amplitude of the AC voltage conversion unit; and
a voltage-current converter for driving a current corresponding to the voltage level of the AC voltage to a power line;
Address-type fire detector for generating an alternating current having a plurality of frequency components including. Each fire detector has a different address code value set depending on the location where it is placed, and is connected to the power line in parallel with each other. a plurality of address-type fire detectors that drive the current of the component to the power line, and in which a signal obtained by adding an operation check voltage to the output value of the fire detection sensor allocated thereto is reflected in the amplitude of the current of the AC component; and
After detecting the current signal flowing through the power line as a voltage, fast Fourier transform is performed to extract the amplitudes for each of the plurality of frequency components, and an average value calculation method or an average value excluding the highest and lowest values for the extracted amplitudes for each of the plurality of frequency components a fire receiver for determining an output value of the fire detection sensor, which is a digital or analog type, using a calculation method, a mode calculation method, a median value calculation method, or a combination of the calculation methods;
A fire detection system that is insensitive to noise.
3. The method of claim 2,
Each of the plurality of address-type fire detectors,
an address setting unit generating an address code value corresponding to an electrical connection state of each of the plurality of switches;
a microprocessor for outputting a plurality of frequency signals corresponding to the address code value one-to-many and outputting an operation check voltage to an output value of the fire detection sensor;
Voltage frequency for outputting an AC voltage having the plurality of frequency components corresponding to the address code value one-to-many, and outputting a value obtained by adding the operation confirmation voltage to the output value of the fire detection sensor to be reflected in the amplitude of the AC voltage conversion unit; and
a voltage-current converter for driving a current corresponding to the voltage level of the AC voltage to the power line;
Noise-insensitive fire detection system comprising a.
3. The method of claim 2,
The fire receiver is
When the output value of the fire detection sensor is 0, the noise is 0, and there is only the operation confirmation voltage, which is a positive value, a correction coefficient for a plurality of frequencies is the ratio of the amplitude values for each frequency extracted through the fast Fourier transform and the operation confirmation voltage is defined, and the estimated value of the output value of each fire detection sensor after finding out the correction coefficient for each of the plurality of frequencies is a value obtained by subtracting the amplitudes for each of the plurality of frequencies when there is only the operation confirmation voltage from the extracted amplitudes for each of the plurality of frequencies Insensitive to noise, characterized in that it is insensitive to noise by calculating the values obtained by multiplying the correction coefficients for each frequency by an average value calculation method, an average value calculation method excluding the highest and lowest values, a mode calculation method, a median value calculation method, or a combination of the above methods a fire detection system.
3. The method of claim 2,
The fire receiver is
In detecting the normal operation, failure, and disconnection of each address type fire detector by utilizing the amplitude and operation check voltage of a plurality of frequency components corresponding one-to-many to the address of each fire detector,
The average value or the mode or median value excluding the average value or the highest value and the lowest value of the amplitudes of the plurality of frequency components, or the magnitude of the output of the fire detector estimated by the combination of the above methods is the average value or the highest value and the lowest value of the amplitude spectrum of the operation confirmation voltage, respectively If it is close to or greater than the average value, the mode value, the median value, or a value extracted by a combination of the above methods,
If the average value of the amplitudes of the extracted plurality of frequency components or the average value excluding the highest and lowest values or the mode or median value or the magnitude of the output of the fire detector estimated by the combination of the above methods approaches 0, it is determined as a failure or departure,
When it is determined that the detector of a specific address is in the normal operating state, and all the detectors after the specific address are determined to be the failure or departure, it is finally determined that a disconnection has occurred between the detector of the specific address and the neighboring detector, characterized in that A fire detection system that is insensitive to noise.

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