KR20190030125A - A fire detection system including a screen display type fire receiver incorporating a recording device - Google Patents

Abstract

Provided is a fire detection system including a screen display type fire receiving unit embedding a recording apparatus comprises: a plurality of address type fire detection devices respectively driving a fire detection constant current having a current value corresponding to its own address code value when a fire detection sensor assigned thereto is activated, wherein a different address code value is set in accordance with a place where a power supply line is disposed, and the power supply lines are connected to each other in parallel; and a fire receiving unit determining whether one or more of the plurality of address type fire detection devices are operated based on a current value flowing through the power supply line and displaying a place where the fire occurred. The fire receiving unit identifies whether the address type fire detection device is operated or an electrical short circuit of the wiring connected to the address type fire detection device has occurred based on the change of the current value, and displays a corresponding situation on a liquid crystal display device by a character.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fire detection system including a screen display type fire detector incorporating a recording device,

FIELD OF THE INVENTION The present invention relates to a fire detection apparatus, and more particularly, to a fire detection system including a screen display type fire reception unit incorporating a recording apparatus.

There are thermal detectors and temperature detectors as fire detectors. The address type automatic fire detection system that has been developed so far includes a method using a resistance type address type fire detector and a method using a 'microcomputer type address type fire detector' have.

(1) Overview of existing resistive address type fire detector and fire detection system

FIG. 1 is a block diagram of a conventional resistance-use address type fire detection system, and FIG. 2 is a block diagram of a conventional fire detection unit.

Referring to FIGS. 1 and 2, a conventional 'resistive address type fire detection system' includes a receiving unit and a plurality of fire detection units. The receiver consists of a current detection resistor, a microcomputer with an analog-to-digital converter (ADC), and a display module.

As shown in FIG. 2, each of the fire detection units includes an address setting unit and a fire detector. The address setting unit includes five address setting switches and five resistors R1 to R5 connected to the switches .

The operation principle of the conventional resistive address type fire detection system is as follows.

When the fire detector operates, the current corresponding to the position of the address setting switch flows to the + 24V power supply line. When the voltage applied to the 'current detection resistor' of the receiver is read from the central processing unit (CPU) through the analog-to-digital converter (ADC), the address value of the address setting switch can be known. have.

라 하고, 주소설정부의 등가 저항값을 R이라 하면, 화재감지기가 동작하였을 때 전류 검출 저항

에 흐르는 전류는

이다. 주소설정용 스위치 5개의 조작으로 R값을 변화시켜

를 정수 배로 하기가 어렵다. 따라서 이 방식은 시공시 어려움이 있다.The advantages and disadvantages of the conventional resistive address type fire detection system are as follows. The advantage is that only the + 24V power line is used without using the communication line, so the construction cost is low. The disadvantage is that it is difficult to proportionally adjust the current flowing in the detector by the operation of the address setting switch. The value of current detection resistor

And the equivalent resistance value of the address setting unit is R, when the fire detector operates, the current detection resistance

The current flowing in

to be. Address setting switch By changing the R value with 5 operations

It is difficult to make an integer multiple. Therefore, this method is difficult to construct.

(2) Overview of address type fire detector and fire detection system using existing microcomputer

3 is a block diagram of a conventional address type fire detection system using a microcomputer.

Referring to FIG. 3, a conventional 'address type fire detection system using a microcomputer' comprises a receiving unit and a plurality of fire detection units. The receiver consists of an input module, a microcomputer, and a display module. The fire detection unit consists of a fire detector, a microcomputer, and an address setting unit.

The operation principle of the conventional 'address type fire detection system using a microcomputer' is as follows. When the fire detector operates, the microcomputer of the fire detection unit sends the address of the fire detector operated through the communication line to the microcomputer of the receiver, so that the address of the fire detector operated can be known.

The advantages and disadvantages of the conventional 'address type fire detection system using a microcomputer' are as follows. The advantage is that it can realize an address type automatic fire detection system. The disadvantage is that it takes a lot of construction cost in addition to the + 24V power line and communication line. In addition to replacing the fire detector and receiver when replacing the already installed fire detection system, construction cost is high because communication line should be installed.

4 is a view showing a conventional fire receiving unit.

Referring to FIG. 4, the conventional fire receiving units 10 and 20 include a fire detection unit installed in each area, and a plurality of LED lamps indicating whether a fire detection signal transmitted from a fire emitting unit installed in each area is received .

Accordingly, it is possible to check which LED lamp among the plurality of LED lamps emits light, and to confirm in which area the fire occurred.

However, since the conventional fire receiving unit simply determines whether or not a fire detection signal is received, if the wiring connected to the fire detection unit is short-circuited or the insulation film of the wiring is damaged, it can be indicated that a fire has occurred have.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned technical problems, and it is an object of the present invention to provide a fire detector and a fire detector which can distinguish and display a signal transmitted from a fire detector, There is provided a fire detection system including a screen display type fire receiver having a built-in recording device capable of displaying a corresponding situation on a display device.

According to the embodiment of the present invention, different address code values are set according to the places where they are arranged, and are connected to the power line in parallel with each other. In this case, when a fire sensor assigned to the fire sensor is activated, A plurality of address type fire detection devices each driving a fire detection constant current having a current value; And a fire receiver for determining whether or not at least one of the plurality of address type fire detection devices is operating based on a current value flowing through the power line and displaying a place where the fire occurred, The receiving unit identifies whether the address type fire detection device is operated or whether the wiring connected to the address type fire detection device is electrically short-circuited based on the change of the current value, and then the corresponding state is displayed as a letter on the liquid crystal display device. A detection system is provided.

The plurality of address type fire sensing apparatuses each include an address setting unit for generating an address code value corresponding to an electrical connection state of each of the plurality of switches; A digital-analog converter for generating a reference voltage having a voltage level corresponding to the address code value; And a constant current circuit unit for driving a fire detection constant current having a current value corresponding to a voltage level of the reference voltage to a line connected in parallel with the power supply line according to control of the reference voltage when the fire detection sensor is activated do.

The constant current source circuit unit includes at least one NMOS transistor under the control of the reference voltage and is configured as a current sink circuit for driving the fire sensing constant current to a line connected in parallel with the power source line .

The constant current source circuit unit includes at least one PMOS transistor under the control of the reference voltage and is configured of a current source circuit for driving the fire sensing constant current to a line connected in parallel with the power source line .

The digital-to-analog converter may further include: a digital-analog converter receiving the address code value and generating an output voltage having a voltage level corresponding to the address code value; And an amplifier for amplifying the output voltage and outputting the amplified output voltage as the reference voltage.

The digital-analog converter may include a microcontroller receiving the address code value in parallel and generating the reference voltage having a voltage level corresponding to the address code value.

A fire detection system including a screen display type fire receiving unit having a built-in recording apparatus according to an embodiment of the present invention can distinguish and display signals transmitted from a fire detection unit and a fire emitting unit, It is possible to display the corresponding situation on the liquid crystal display device by sensing that the transmitter is electrically short-circuited.

Therefore, even if the wiring connected to the fire sensing part and the fire emitting part is damaged due to the built-in construction, etc., the fire receiving part can detect a situation due to an electrical short, so that maintenance of the system can be smoothly performed.

1 is a block diagram of a conventional resistive address type fire detection system
2 is a block diagram of a conventional fire detection unit
FIG. 3 is a block diagram illustrating a conventional address type fire detection system using a microcomputer
4 is a view showing a conventional fire receiving unit
5 is a block diagram of a fire detection system 1 according to an embodiment of the present invention.
FIG. 6 is a block diagram of the address type fire detection apparatus 100-1 using the voltage control current source included in the fire detection system 1
FIG. 7 is a block diagram of another embodiment of the digital-to-
8 is a block diagram of a digital-to-analog converter according to another embodiment of the present invention.
Fig. 9 is a circuit diagram according to another embodiment of the constant current source circuit portion
10 is a view illustrating a fire receiving unit according to an embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention.

5 is a configuration diagram of a fire detection system 1 according to an embodiment of the present invention.

The fire detection system 1 according to the present embodiment includes only a brief configuration for clearly explaining the technical ideas to be proposed.

Referring to FIG. 5, the fire detection system 1 includes a plurality of address type fire sensing apparatuses 100 and a fire receiving unit 200.

In particular, the fire receiving unit 200 includes a fire detection unit installed in each area, a plurality of LED lamps indicating whether a fire detection signal transmitted from a fire emitting unit installed in each area is received, and a display module.

Accordingly, not only can the fire detection sensor and the fire signal transmitter transmit signals separately, but also the fire detection sensor and the fire detector can be electrically short-circuited to display a corresponding situation on the liquid crystal display device.

That is, even if the wiring connected to the fire detection sensor and the fire transmitter is damaged due to the built-in construction or the like, the fire reception unit 200 can detect a situation due to an electrical short, so that maintenance of the system can smoothly proceed. - Detect the change of the current value and judge the short circuit condition -

In addition, the fire reception unit 200 has a function of detecting and displaying a failure of a plurality of LED lamps indicating whether a fire detection signal has been received, and a function of detecting a door open state constituting the main body, As shown in FIG.

That is, the fire receiving unit of the fire detection system 1 of the present invention not only displays the operation boundary area as a light emitting diode when a fire or detector malfunctions, but also up to 1000 events such as a switch operation, a sensor malfunction, And a printer can be used as a recording device. A liquid crystal display device displays the status of each of the characters in a character so that the general public can easily understand and operate the automatic fire detection system.

The detailed configuration and main operation of the fire detection system 1 configured as above will be described below.

The plurality of address type fire detection apparatuses 100 are arranged at different places, respectively, and are devices configured to detect whether or not a fire place is located.

In addition, since a plurality of address-type fire detection apparatuses 100 are set with different address code values according to their locations, the location of each address-type fire detection apparatus can be identified through the setting of an address code value.

The plurality of address type fire detection apparatuses 100 are configured such that different address code values are set according to their locations and are connected in parallel to the power line. The plurality of address type fire sensing apparatuses 100 respectively drive a fire detection constant current having a current value corresponding to its own address code value when the fire detection sensor assigned thereto is active.

For example, if the first address type fire sensing apparatus 100-1 among a plurality of address type fire detection apparatuses 100 is represented,

When the fire detection sensor of the first address type fire detection apparatus 100-1 is in the active fire detection state, the first address type fire detection apparatus 100-1 detects a current value corresponding to the address code value of the first address type fire detection apparatus 100-1 (I1) having the first fire sensing current I1.

When the fire detection sensor of the second address type fire detection apparatus 100-2 is in an active fire detection state, the second address type fire detection apparatus 100-2 outputs a current corresponding to its own address code value Sensing constant current (I2) having a value corresponding to the second detected fire current I2.

At this time, the current value of the first fire detection constant current I1 and the current value of the second fire detection constant current I2 are determined by the address code value set in the address setting unit of the first fire detection constant current I1.

In particular, since the constant current of the fire detection is driven by the constant current source circuit portion, the current value of the first fire sensing constant current I1 and the current value of the second fire sensing constant current I2 can be easily designed to be integer times.

The fire receiving unit 200 determines whether at least one of the plurality of address type fire detection apparatuses 100 is operating or not, based on the current value flowing through the power line, And the like.

For example, when all of the fire detection sensors of the plurality of address type fire sensing apparatuses 100 are not in an active state, they are defined as states in which no fire occurs in all places. At this time, since all the plurality of address type fire detection apparatuses 100 do not drive the fire detection constant current, a basic current (I _normal ) due to the termination resistance (R _normal ) flows in the power source line.

At this time, the fire detection sensor of the first address type fire detection apparatus 100-1 is in the active fire detection state, and the first address type fire detection apparatus 100-1 detects the current value When the first fire sensing constant current (I1)

Since the first address type fire sensing apparatus 100-1 is connected in parallel with the power supply line, the total current value I flowing through the power supply line is the sum of the basic current I _normal and the first fire sensing constant current I1 Lt; / RTI >

Accordingly, the fire receiver 200 determines that the first address type fire sensing apparatus 100 is in the active fire detection state by sensing the total current value I flowing through the power line, and the first address type fire sensing apparatus 100 -1) is displayed through the display module.

In addition, when the first address type fire detection apparatus 100-1 detects the fire detection sensor of the first address type fire detection apparatus 100-1 in the active fire detection state, the first address type fire detection apparatus 100-1 detects the current value (I1) having the first fire sensing current I1,

When the fire detection sensor of the second address type fire detection apparatus 100-2 is in the active fire detection state and the second address type fire detection apparatus 100-2 has the current value corresponding to the address code value of the second address type fire detection apparatus 100-2 When driving the second fire-sensing constant current I2,

Since the first address type fire detection apparatus 100-1 and the second address type fire detection apparatus 100-2 are connected in parallel with the power supply line, the total current value I flowing in the power supply line is the basic current I _normal ), the first fire sensing constant current I1 and the second fire sensing constant current I2.

Accordingly, the fire receiver 200 senses the total current value I flowing in the power line and judges that the first and second address type fire detection apparatuses 100-1 and 100-2 are all active-fire detection states , And the occurrence of a fire in the area where the first and second address type fire sensing apparatuses 100-1 and 100-2 are located is displayed through the display module.

Since the fire detection constant currents I1 to IN driven by the plurality of address type fire detection apparatuses 100 are designed to have an integral multiple of each, the fire receiving unit 200 calculates the total current value I flowing through the power line Type fire detection apparatuses 100 can determine whether at least one of the plurality of address type fire detection apparatuses 100 is operating.

Meanwhile, the fire receiving unit 200 includes a fire detection unit installed in each area, a plurality of LED lamps indicating whether a fire detection signal transmitted from a fire emitting unit installed in each area is received, and a display module.

Accordingly, not only can the fire detection sensor and the fire signal transmitter transmit signals separately, but also the fire detection sensor and the fire detector can be electrically short-circuited to display a corresponding situation on the liquid crystal display device.

That is, even if the wiring connected to the fire detection sensor and the fire transmitter is damaged due to the built-in construction or the like, the fire reception unit 200 can detect a situation due to an electrical short, so that maintenance of the system can smoothly proceed. - Detect the change of the current value and judge the short circuit condition -

In addition, the fire reception unit 200 has a function of detecting and displaying a failure of a plurality of LED lamps indicating whether a fire detection signal has been received, and a function of detecting a door open state constituting the main body, As shown in FIG.

That is, the fire receiving unit of the fire detection system 1 of the present invention not only displays the operation boundary area as a light emitting diode when a fire or detector malfunctions, but also up to 1000 events such as a switch operation, a sensor malfunction, And a printer can be used as a recording device. A liquid crystal display device displays the status of each of the characters in a character so that the general public can easily understand and operate the automatic fire detection system.

The configuration and operation of the fire detection system 1 shown in FIG. 5 will be described in more detail as follows.

The fire receiver 200 includes a current detector, a microcomputer (MCU) having an analog-to-digital converter (ADC), and a display module.

Further, it consists of a plurality of address-type fire detection device 100 and the terminal resistor (R _normal), each of the "address-type fire detection device, the address setting unit, D / A conversion unit, the fire detection sensors, and the constant current source And a circuit portion.

  The address setting unit of the 'address type fire detection device' serves to set the address in the form of binary numbers. The D / A conversion unit converts the address set in binary form to an analog voltage and outputs the analog voltage. When the sensor operates, it serves to flow the current controlled by the output voltage of the D / A change part to the + 24V power supply line.

를 저항

를 통하여 검출하고 증폭기로 증폭한다. '마이컴(MCU)'은 증폭기의 출력전압을 ADC(Analog to Digital Coverter)를 통하여 받아들여 정상상태 여부와 동작한 주소형 화재감지장치의 주소(즉, 화재발생 위치)를 알아내고 결과를 '디스플레이 모듈'로 보낸다. 디스플레이 모듈은 마이컴으로부터 받은 정보, 즉 정상상태 여부와 화재발생 위치를 표시해 주는 장치이다.The current detecting unit 'in the fire receiving unit 200 detects the current flowing in the +24 V power line

Resistance

And amplified by an amplifier. The MCU receives the output voltage of the amplifier through the ADC (Analog to Digital Coverter), finds the address of the address type fire detection device operating with the normal state or not, Module '. The display module is a device that displays information received from the microcomputer, that is, whether or not the microcomputer is in a normal state and where the fire occurs.

의 전류가 흐르고, 화재가 발생하여 화재감지기부에 있는

번주소의'주소형 화재감지장치'가 동작하면 +24V 전원선에

의 전류가 흐른다.

의 크기는'주소형 화재감지장치'의 주소 설정부에서 설정한 주소값

에 따라 크기가 결정된다. In a normal state where no fire occurs and all of the fire detectors are not working,

Current flows, and a fire occurs in the fire detection base

Address type fire detection device 'operates, it is connected to + 24V power line.

Current flows.

Is the address value set by the address setting unit of the 'address type fire detection device'

.

For example, if 'address type fire detection device' of address 1 operates, current of 1 mA corresponding to address value 1 flows. If 'address type fire detection device' of address 2 is operated, address 2 A corresponding current of 2 mA flows.

를 저항

에 걸리는 전압

로 검출하고 증폭기로 K배 증폭한다. 마이컴(MCU)은 ADC를 통하여 증폭된

의 전압을 디지털 신호로 변환하고, CPU는 변환된 결과를 입력받아 프로그램 처리하여 정상상태 여부와 동작한 주소형 화재감지장치의 주소(즉, 화재발생 위치)를 알아낸다. 디스플레이 모듈은 정상상태 여부와 화재발생 위치를 나타내 준다.The current detector of the fire receiver 200 detects the current flowing in the +24 V power line

Resistance

The voltage across

And amplified by K times with an amplifier. The MCU is amplified through the ADC

The CPU converts the voltage of the fire signal into a digital signal, and the CPU receives the converted result, processes the program, and finds the address of the address type fire detection device operated in the normal state (i.e., the fire occurrence position). The display module indicates whether it is in a normal state and where the fire occurred.

의 전류가 흐르므로 CPU에서 받아들인 전압값은

이다. i번 주소에서 화재가 발생하여 i번 주소의 '주소형 화재감지장치'가 동작하면, +24V 전원선에

의 전류가 흐르므로 CPU에서 받아들인 전압값은

이다. When in a normal state without a fire, connect to the + 24V power line

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

to be. If a fire occurs at address i and the 'address type fire detector' of address i is activated, connect the + 24V power line

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

to be.

에서

으로

만큼 증가하면 i번 주소의 '주소형 화재감지장치'가 동작한 것으로 판단할 수 있다.Therefore, the voltage value received by the CPU

in

to

, It can be determined that the 'address type fire detection device' of address i has been operated.

     The advantages of the address type fire detection device using the voltage controlled current source controlled by the digital analog converter and the fire detection system including the same are as follows.

의 전류가 더 흐르게 함으로써 동작한 주소형 화재감지장치의 주소 i를 알아내는 방법이므로 기존의 통신선과 +24V 전원선 모두를 사용하는 방법보다 설치비가 적게 든다.The method of detecting the fire address is that when the address type fire detector of address i is operated,

The method of finding the address i of the address type fire detection device operated by further flowing the current of the address type fire detection device is less than the method of using both the existing communication line and the + 24V power line.

6 is a configuration diagram of an address type fire detection apparatus 100-1 using a voltage control current source included in the fire detection system 1. In FIG.

The address type fire detection apparatus 100-1 according to the present embodiment includes only a simple structure for clearly explaining a technical idea to be proposed.

Referring to FIG. 6, the address type fire detection apparatus 100-1 includes an address setting unit 110, a digital-analog converter 120, and a constant current circuit unit 130.

The detailed configuration and main operation of the address type fire sensing apparatus 100-1 configured as above will be described below.

The address setting unit 110 generates an address code value corresponding to an electrical connection state of each of the plurality of switches. In this embodiment, since eight switches are provided, the (digital) address code value can be set by a combination of turn-on (TURN ON) and turn-off (TURN OFF) of each switch.

The digital-analog converter 120 generates a reference voltage VREF having a voltage level corresponding to the address code value.

In the present embodiment, the digital-analog converter 120 includes a digital-to-analog converter 121 and an amplifier 122.

The digital-to-analog converter 121 receives the address code value and generates an output voltage VO having a voltage level corresponding to the address code value. That is, the voltage level of the output voltage VO output from the digital-to-analog converter 121 is determined by an address code value, which is a digital code value, and the amplifier 122 amplifies the output voltage VO by a preset gain And output as the reference voltage VREF.

For reference, the digital-to-analog converter 120 may be configured not to include the amplifier 122 but to use the output voltage VO output from the digital-to-analog converter 121 as the reference voltage VREF as it is .

When the fire detection sensor 140 is activated, the constant current source circuit unit 130 generates a constant current I1 that has a current value corresponding to the voltage level of the reference voltage VREF under the control of the reference voltage VREF, To a line connected in parallel with the power supply line.

The constant current source circuit unit 130 includes at least one NMOS transistor under the control of the reference voltage VREF and includes a current sink circuit for driving the fire sensing constant current I1 to a line connected in parallel with the power source line, ≪ / RTI >

That is, the constant current source circuit unit 130 includes a comparing unit 131, a current driving unit 132, and a switching device (SCR).

At this time, the comparator 131 compares the feedback voltage by the fire detection constant current I1 and the resistor R with the reference voltage VREF, and outputs the voltage outputted by the comparison result to the current driver 132 To the gate terminal of the NMOS transistor.

The current driving unit 132 drives the fire sensing constant current I1 corresponding to the voltage level of the reference voltage VREF when the switching element SCR is turned on. In this embodiment, the switching element SCR, Is composed of a silicon controlled rectifier (SCR).

The silicon controlled rectifier (SCR) selectively turns on according to the control of the fire detection signal transmitted from the fire detection sensor 140. Therefore, when the SCR (Silicon Controlled Rectifier) is turned on (when the fire is detected), the current driver 132 drives the fire detection constant current I1 to the line.

That is, the operation principle of the address type fire detection apparatus 100-1 is as follows. In FIG. 5, the address set by the address setting unit 110 can be handled as an address of a fire detection sensor and can also be handled as an address of the 'address type fire detection apparatus 100-1'.

[V]이며, 증폭기(122)의 출력전압 V_ref는

이므로 i번 주소의 화재감지 센서(140)가 동작하면 SCR이 턴온(turn on)되고 정전류원 회로부(130)의 출력단 트랜지스터에 흐르는 전류 I_i는

이다. 즉, i번 주소의 주소형 화재감지장치(100-i)가 동작하면 +24V 전원선에 화재가 발생하지 않은 정상상태보다 I_i의 전류가 더 흐르며, I_i는 i에 일대 일로 대응하므로 I_i를 알면 i를 알 수 있다. Consider the case where the digital-to-analog converter 121 is 8 bits and the gain of the amplifier 122 is K in Fig. When the address setting switch in the address setting unit 110 is set to N ₂ as a binary number and i as a decimal number, the input value of the digital-to-analog converter 121 is i (that is, N ₂ ) The output voltage V _o

[V], and the output voltage V _ref of the amplifier 122 is

Therefore, when the fire detection sensor 140 at address i is operated, the SCR turns on and the current I _i flowing through the output terminal of the constant current source circuit unit 130 is

to be. That is, when the i-th address, address-type fire detection device (100-i) the operation of the + 24V power supply line of fire than the steady state flows more and a current of I _i did not occur on, I _i, so the corresponding day one to i I Knowing _i can tell i.

이다.In the 'address type fire detection apparatus 100-1' of FIG. 6, the constant current source circuit unit 130 is configured as a current sink using an npn type transistor. However, as shown in FIG. 8, a pnp type transistor Can also be implemented as a discharge current source. In this case, I _i

to be.

FIG. 7 is a configuration diagram of another embodiment of the digital-analog converter 120A.

Referring to FIG. 7, the digital-analog converter 120A includes a microcontroller 121A and an amplifier 122A.

The digital-analog converter 120A receives the address code value in parallel, and generates a reference voltage VREF having a voltage level corresponding to the address code value.

In this embodiment, the microcontroller 121A receives the address code value through the parallel port, and generates the output voltage VO having the voltage level corresponding to the address code value. That is, the voltage level of the output voltage VO output from the microcontroller 121A is determined by an address code value, which is a digital code value, and the amplifier 122A amplifies the output voltage VO by a predetermined gain, And outputs it as a voltage VREF.

For reference, the digital-analog converter 120A may be configured not to include the amplifier 122A but to use the output voltage VO output from the microcontroller 121A as the reference voltage VREF as it is.

8 is a block diagram of a digital-analog converter 120B according to another embodiment of the present invention.

Referring to FIG. 8, the digital-analog converter 120B includes a microcontroller 121B and a low-pass filter 122B.

The digital-analog converter 120B receives the address code values in parallel, and generates a reference voltage VREF having a voltage level corresponding to the address code value. The microcontroller 121B converts the address code value And generates a PWM output voltage (Pulse Width Modulation, PWM) having a pulse width corresponding to the address code value. That is, the pulse width of the PWM output voltage PWM is determined according to the address code value, and the voltage level of the reference voltage VREF is also determined by the pulse width of the PWM output voltage PWM, Can be considered to be determined corresponding to the address code value.

The low-pass filter 122B receives the PWM output voltage PWM, removes the ripple signal, and outputs the reference voltage VREF.

That is, the pulse width of the PWM output voltage PWM output from the microcontroller 121B is determined by an address code value, which is a digital code value, and the low-pass filter 122B is configured to remove the ripple of the PWM output voltage PWM And outputs it as a reference voltage VREF.

Fig. 9 is a configuration diagram according to another embodiment of the constant current source circuit portion 130A.

9, when the fire detection sensor 140 is activated, the constant current source circuit portion 130A controls the constant current source circuit portion 130A to detect a fire having a current value corresponding to the voltage level of the reference voltage VREF in accordance with the control of the reference voltage VREF The constant current I1 is driven by a line connected in parallel with the power supply line.

The constant current source circuit part 130A includes at least one PMOS transistor under control of the reference voltage VREF and includes a current source circuit for driving the fire sensing constant current I1 to a line connected in parallel with the power source line, ≪ / RTI >

That is, the constant current source circuit portion 130A includes a comparator 131A, a current driver 132A, and a switching element SCR.

At this time, the comparator 131A compares the feedback voltage by the fire detection constant current I1 and the resistor R with the reference voltage VREF, and outputs the voltage output from the comparison result to the current driver 132A To the gate terminal of the PMOS transistor.

The current driving part 132A drives the fire sensing constant current I1 corresponding to the voltage level of the reference voltage VREF when the switching element SCR is turned on. In this embodiment, the switching element SCR, Is composed of a silicon controlled rectifier (SCR).

The silicon controlled rectifier (SCR) selectively turns on according to the control of the fire detection signal transmitted from the fire detection sensor 140. Therefore, when the SCR (Silicon Controlled Rectifier) is turned on (when the fire is detected), the current driver 132A drives the fire detection constant current I1 to the line.

10 is a view illustrating a fire receiver 200 according to an embodiment of the present invention.

The fire reception unit 200 includes a fire detection unit installed in each area, a plurality of LED lamps 201 indicating whether a fire detection signal transmitted from a fire emitting unit installed in each area is received, and a display module 202 .

Accordingly, not only the fire signal from the fire sensor and the fire signal transmitter can be separately displayed, but also the fire sensor and the fire detector can be electrically short-circuited to display the corresponding state in the liquid crystal display device 202 by letters.

That is, even if the wiring connected to the fire detection sensor and the fire transmitter is damaged due to the built-in construction or the like, the fire reception unit 200 can detect a situation due to an electrical short, so that maintenance of the system can smoothly proceed. - Detect the change of the current value and judge the short circuit condition -

In addition, the fire receiving unit 200 has a function of detecting and displaying the failure of a plurality of LED lamps 201 indicating whether a fire detection signal has been received, and a function of detecting the open state of a door constituting the main body, A function capable of transmitting to the terminal of the administrator is implemented.

That is, the fire receiving unit 200 of the fire detection system 1 of the present invention not only displays the operation boundary area as a light emitting diode when a fire or a detector malfunctions, but also sets the event occurrence situation such as a switch operation, a sensor malfunction, It can store up to 1000 and can be used as a printer by a recording device. It can be easily understood and operated by the general public as well as the automatic fire detection system by displaying each situation in letters on the liquid crystal display device.

A fire detection system according to an embodiment of the present invention can operate using only a power line without using a communication line by using a voltage controlled current source controlled by a digital-to-analog converter.

Further, when a fire detection system including a plurality of address type fire detection devices is constructed, it is possible to easily set the fire detection constant current to be driven by each address type fire detection device to be an integer multiple.

In addition, a fire detection system including a screen display type fire receiving unit with a built-in recording device can distinguish and display the signals transmitted from the fire detection unit and the fire emitting unit, And the corresponding situation can be displayed in the form of a letter on the liquid crystal display device.

Therefore, even if the wiring connected to the fire sensing part and the fire emitting part is damaged due to the built-in construction, etc., the fire receiving part can detect a situation due to an electrical short, so that maintenance of the system can be smoothly performed.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: Fire detection system
110: address setting section
120: digital-analog converter
121: Digital-to-Analog Converter
122: amplifier
130: constant current source circuit part
131:
132: current driver
200: Fire receiver
201: LED lamp
202: display module

Claims (6)

And a plurality of address code values are set according to the location where the fire detector is installed and are connected to the power line in parallel. When the fire sensor assigned to the fire detector is activated, a fire detection constant current having a current value corresponding to its address code value A plurality of address type fire detection devices each driving the plurality of address type fire detection devices; And
And a fire receiver for determining whether or not at least one of the plurality of address type fire detection devices is operating based on a current value flowing through the power line,
The fire receiver identifies whether the address type fire detection device is operated or whether the wiring connected to the address type fire detection device is electrically short-circuited based on the change of the current value, and then displays the corresponding situation in the liquid crystal display device. Fire detection system.
The method according to claim 1,
Wherein the plurality of address type fire detection devices each include:
An address setting unit for generating an address code value corresponding to an electrical connection state of each of the plurality of switches;
A digital-analog converter for generating a reference voltage having a voltage level corresponding to the address code value; And
A constant current source circuit unit for driving a fire detection constant current having a current value corresponding to a voltage level of the reference voltage to a line connected in parallel with the power supply line according to the control of the reference voltage when the fire detection sensor is activated;
And a fire detection system.
3. The method of claim 2,
The constant current source circuit portion includes:
And a current sink circuit including at least one NMOS transistor under the control of the reference voltage and driving the fire sensing constant current to a line connected in parallel with the power supply line. .
3. The method of claim 2,
The constant current source circuit portion includes:
And a current source circuit that includes at least one PMOS transistor under the control of the reference voltage and drives the fire sensing constant current to a line connected in parallel with the power supply line. .
3. The method of claim 2,
Wherein the digital-
A digital-analog converter receiving the address code value and generating an output voltage having a voltage level corresponding to the address code value; And
And an amplifier for amplifying the output voltage and outputting the amplified output voltage as the reference voltage.
3. The method of claim 2,
Wherein the digital-
And a microcontroller receiving the address code value in parallel and generating the reference voltage having a voltage level corresponding to the address code value.

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