KR0134885Y1 - Automatic fire detector using frequency chip - Google Patents

Abstract

An automatic fire detection apparatus using a dual tone complex frequency generating chip is disclosed. This device supplies power in parallel to the transmitter to generate a fire generating signal of the dual tone complex frequency type which indicates its own number when a fire occurs, and to the transmitter located in an arbitrary area in parallel. And a receiver unit for determining a position of a transmitter unit generating a fire occurrence signal by analyzing a double tone complex frequency of the fire generation signal transmitted from the power distribution unit and the transmitter unit. All transmitters installed in any area are used for both power supply and signal transmission and are connected in parallel through a distribution unit consisting of two strands of wire. The receiver unit analyzes the dual tone complex frequency signal transmitted from the transmitter to identify the transmitter unit in which the fire occurred, that is, the location where the fire occurred, and displays the corresponding position information in 7-segment. The present invention uses a dual tone complex frequency generating chip and a receiver to quickly and accurately indicate the location of the fire. It is installed by connecting all transmitters and one receiver using a distribution unit having two wires. Simplifies and prevents malfunctions.

Description

Automation material detection device using dual tone complex frequency generation chip

The present invention relates to an automatic fire detection device using a dual tone complex frequency generation chip, and particularly to prevent malfunction of the automatic fire detection device using a normally closed contact, and a dual tone multi frequency (DTMF) generation chip. It relates to a device for quickly and accurately identifying the fire location using.

As is well known to those skilled in the art, non-fire report means misinterpreting that a fire has occurred due to the operation of an automated fire detection system due to factors other than heat or smoke caused by the fire. 61.7% of these non-fire reports are due to sensors. While non-fire news scares or scares people, in the event of an actual fire, alarm bells and property are lost.

Non-fire alarms according to the prior art have maintained the surroundings of the temperature sensor at a considerably high temperature but have not raised the seedling. The current temperature sensor is mainly composed of a top type bimeltal type and a top type air chamber type. As is well known to those skilled in the art, this type of temperature sensing is suitable for the two contacts of the bimetal or air chamber at the preset temperature so that the contacts of the bimetal or air chamber come into contact with each other to form a closed circuit. It is fixed by adjusting it to maintain the gap.

However, such open contact points can be applied to moisture and dust in the air depending on the installed environmental conditions, and to microorganisms such as harmful gases such as carbon monoxide (CO) and fungi. In addition, the film | membrane by these forms in the upper contact type. This film increases in thickness with time. When the surrounding temperature reaches a preset temperature in the state where the film is formed on the contact as described above, the contacts of the temperature sensor approach each other and touch each other, but the film between the contacts prevents good electrical contact. .

In this case, in order for the contacts to penetrate the rupture of the contact surface and make good electrical contact, the contacts must be subjected to considerable pressure, which is the force of expansion of the air in the air chamber or the bending of the bimetal at a preset temperature. It is virtually difficult to make good contact through the film, and even if the film is pierced, it becomes incomplete contact (excessive contact resistance), which causes a large loss because it cannot flow the current required to operate the relay (RY) of the receiver or repeater normally. .

This is a fundamental disadvantage of the open type, and the disadvantage becomes more pronounced when the contact signal is transmitted by a small current as in a temperature sensor.

Currently, the fire fighting method and the receivers manufactured and installed in Korea are P-type receivers and R-type receivers. G.P.type added gas leakage detection function to P type, and G.R.type added gas leakage detection function to R type. Basically, such a receiver is connected to a detector, a repeater, and a receiver in order. This is inevitable due to the signal transmission method and the structure of the receiver.

However, in this type of transceiver, the larger the number of detectors, the more the number of lines (the number of strands of wires) between the detector and the repeater, the repeater, and the receiver, which makes the wiring complex and expensive. This may lead to a large number of connection points and the number of poor connection points, and thus, there is a problem in that noise is generated by disturbing good transmission of a transmission signal, thereby providing a cause of malfunction.

In the case of type R, which requires fewer lines, it requires at least four wires and as many as two digits of wire. This is due to the inevitable factors of these devices, which have many wires.

Like this, even though there are many wires, it is difficult to construct, but each generation does not have an independent fire detection circuit, and several generations are tied to the circuit, so it is impossible to know at which generation even a fire alarm comes from. It takes some time to verify this.

In the case of the P-type receiver, the statistics are not known, but there are quite a few malfunctions, and in the case of the R-type. This is often the case with top-level detectors.

In the case of an R-type receiver, malfunctions due to electromagnetic interference (EMI) are known to be very severe, and recently, a twisted pair or shield wire is used to cope with this.

Type R is the Pulse Code Modulation (PCM) method, and the receiver using this method generates noise unique to the PCM method. That is, sampling noise occurs during sampling, and quantization noise occurs when quantizing and encoding. These deteriorate the quality of the transmitted signal, and generate little or amplified noise at the input terminals in the absence of the transmitted signal (when the detector is open at the contacts). appear. In addition, due to the strong noise appearing in the transmission path, the determination of the presence or absence of a pulse (Pulse) is wrong and generates an incorrect sign noise. Since these are weak points of the PCM method, in order to solve these disadvantages, the design and construction of the PCM method should be further advanced to minimize the occurrence of noise. However, overcoming the PCM method is not only difficult in reality, but also fundamentally does not cure the problem.

P-type receivers and R-type receivers have their own size, which is very large for their functions and capabilities, and in many cases, they have to use a relay called a relay, which is a disadvantage in terms of cost and use of building area.

Therefore, in order to solve the above problems, the present invention prevents the malfunction of the automatic fire detection device by using the normally closed contact, and quickly detects the exact location of the fire by using the dual tone complex frequency generating chip to prevent the loss of life due to fire and It is an object of the present invention to provide an automatic fire detection device using a dual tone complex frequency generating chip that reduces property damage.

1 is a circuit diagram of a transmitter of an automatic fire detection apparatus according to the present invention.

2 is a circuit diagram of the receiver unit of the automatic fire detection apparatus according to the present invention.

3 is an arrangement diagram of the number plate of the dual tone complex frequency generation chip used in the present invention.

4 is a frequency diagram of the number plate of the dual tone complex frequency generation chip used in the present invention.

5 is a keyboard configuration of a general number plate.

6 is a keyboard configuration of the number plate used in the present invention.

7 is a double tone waveform diagram of one row and one column by the double tone composite frequency generation chip according to the present invention.

8 is a truth table of the receiver chip for the signal due to the dual tone complex frequency used in the present invention.

9 is a block diagram of the receiver of the automatic fire detection apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

TR ₁ : PNP type transistor

IC ₁ , IC ₈ , IC ₉ and IC ₁₁ : Schmitt Trigger

IC ₂ , IC ₃ and IC ₆ × 8: Inverter

IC ₄ and IC ₁₀ : 2-Input NAND Gate

IC ₅ : 0ctal counter with 8 Decoded Output

IC ₇ : Dual Tone Multiple Frequency (DTMF) Generation Chip

IC ₁₂ to IC ₁₆ : Inverter OP ₁ : OP Amplifier

AS ₁ to AS ₅ : Bilateral Switch

SS1 to SS _n : Normally closed detector group

TS: Test switch of sensing circuit

XTAL ₁ : Crystal Oscillator (3.579545MHz)

T ₁ : output transformer T ₂ : input transformer

CH ₁ : choke coil for load

LED _1: luminescence for inspection of the TR ₁ which is on when the diode function TR ₁

R ₁ : Bias resistor of TR ₁ R ₂ : Input resistance of IC ₁

R ₃ : Current regulating resistor applied to LED ₁

R ₄ : Time constant resistance of the integral circuit

R ₅ : Pull down resistor at IC ₅ 's clock enable terminal

R ₆ : Output resistance of IC ₇

R ₇ and R ₈ : Split resistor for applying reference voltage to inverting input terminal of OP ₁

R ₉ : Resistance to set time constant R ₁₄ : Safety resistance

C ₁ : Time constant capacitor in the integral circuit

C ₂ , C ₃ and C ₅ : coupling condenser

C ₄ : time constant capacitor

C ₆ and C ₇ : capacitors defining the oscillation time constant with R ₁₀ and R ₁₁ in the oscillating circuits of IC ₁₃ and IC ₁₄

C ₉ : power safety capacitor

C ₈ : Clock pulse of IC ₅ with R ₁₂ and R ₁₃ in differential circuits of IC ₁₅ and IC ₁₆

Condenser making

(R ₁ ), (R ₂ ), (R ₃ ) and (R ₄ ): terminal (R ₁ ), (R ₂ ), (R ₃ ) and (R ₄ ) of IC ₇ Row 1, row 2, row 3 and row 4 are connection terminals in the arrangement of keyboard.

(C ₁ ) (C ₂ ) and (C ₃ ): Terminals (C ₁ ), (C ₂ ) and (C ₃ ) of IC ₇ ie, Column 1, Column 2, Column in the numeric array of FIG. 3 terminals for connection

J and K: Wiring terminal for both signal and power for connecting multiple transmitters

And : Receiver part , Wiring terminal for common signal and power supply for connecting to terminal

7-Segment LED Indicator: Anode common 7-segment LED indicator

IC ₁₇ to IC ₂₄ : BCD-7 segment driver with open collector type and low active output

IC ₂₅ × 8: A total of eight NOR gate chips, in which one chip consists of four two-input NOR gates

IC ₂₆ to IC ₃₃ : IC for receiving double tone complex frequency (DTMF)

AS ₆ to AS ₁₄ : Analog Switch (Bilateral Switch)

IC ₃₄ : OCtal Counter with 8 Decoded Outputs

OP ₂ : OP amplifier IC ₃₅ and IC ₃₆ : Schmitt trigger

SCR ₁ : Semiconductor Controlled Rectifier

TR ₂ and TR ₃ : NPN type transistors are used for power supply transistors such as starter relays, sprinklers, etc.

T ₃ : Hybrid Input Transformer

D ₂ : Diode

LED ₂ : Light emitting diode for checking SCR ₁ when SCR ₁ is operating

RS ₁ : Power off switch to stop operation of SCR ₁

R ₂₉ × 7 to R ₃₆ × 7: an array of seven resistors as a current-limiting resistor

R ₃₇ to R ₄₄ : input resistance of IC ₂₆ to IC ₃₃

R ₁₅ : resistance to determine time constant

R ₁₆ and R ₁₇ : Split resistor for applying reference voltage to inverting input terminal of OP ₂ amplifier

R ₁₈ : Pull-down resistor for reset terminal RES of IC ₃₄

R ₁₉ : Pull-down resistor at IC ₃₄ 's clock enable terminal

R ₂₀ and R ₂₁ : Split resistor to obtain the gate trigger current (IG) or gate trigger voltage (V _GK ) required to turn SCR ₁ ON

R ₂₂ and R ₂₃ : load resistance of SCR ₁ and bias resistance of TR ₂ and TR ₃

R ₂₄ : Current regulating resistor of LED ₂

R ₂₅ and R ₂₇ : bias resistors of TR ₂ and TR ₃

C ₉ and C ₁₀ : coupling capacitor

C ₁₁ : Capacitor for setting time constant

C ₁₂ to C ₁₈ : a capacitor for supplying a reference frequency of 3.579545 MHz (oscillator XTAL ₂ ) to IC ₂₇ to IC ₃₃ .

CH ₂ : load choke coil

TER ₁ and TER ₂ : Start relay connection terminal of light grade, sprinkler, fire pump

: On transmitter side Wiring for the signal and power supply of the transmitter

: Anode of power Power supply cathode

50: detector group 100: transmission unit

110: signal generator 120: power distribution unit

130: detection unit 200: display unit

210: decimal conversion unit

220: dual tone complex frequency receiver

230: signal receiving unit 240: moving unit

250: power supply unit 310: detector group + transmitter

320: transmitter 330: fire pump

340: Sprinkler Pump 350: Seedling

360: indicator light 370: receiver

In order to achieve the above object, according to the present invention, the preferred embodiment of the automated material detection device using a dual tone complex frequency generation chip, in the automatic fire detection system that tells whether or not a fire, the fire itself is unique At least one transmitter for generating a fire occurrence signal in the form of a double tone complex frequency indicative of a number; A receiver unit for analyzing a double tone complex frequency of the fire generation signal transmitted from the transmitter unit to determine the position of the transmitter unit generating the fire generation signal; And a power distribution unit for supplying power in parallel to the transmitter units respectively located in an arbitrary area and transmitting a fire occurrence signal to the receiver unit.

The power distribution unit is used for the transmission of a fire occurrence signal and power supply, and has two wires connecting all transmitters.

The transmitter unit, a detection unit for generating a fire detection signal when detecting the occurrence of a fire; Receiving a fire detection signal, a signal generator for generating a signal for generating a double-tone composite frequency waveform, and when receiving a signal transmitted from the signal generator, a double tone composite frequency waveform type of fire indicating the unique number of the transmitter It includes a transmission unit for generating a generation signal and transmitting to the power distribution unit.

The detection unit is configured as a manual transmitter using a normally closed detector group or a non-automatic return button switch that automatically detects a fire occurrence.

The receiver unit includes a signal receiving unit for receiving a fire occurrence signal in the form of a double tone complex frequency waveform through the distribution unit; A DTMF receiver for generating position information by analyzing the dual tone complex frequency waveform received by the signal receiver; And a display unit for visually displaying the position information converted in the hexadecimal form and converting the position information into a hexadecimal form for driving the display unit.

The receiver unit further includes a movable unit for operating the equipment for fire suppression by the fire generating signal in the form of a double tone complex frequency waveform received by the signal receiving unit.

The detection unit may include a detection circuit for detecting a fire occurrence and a signal transmission unit for transmitting the fire detected by the detection circuit together with the location information of the fire occurrence point to the signal generation unit.

The sensing circuit is preferably in the form of a normally closed sensing group, and its kind is preferably one of a bimetal, a thermal ferrite reed switch, and a soluble alloy type thermal fuse.

In addition, it is preferable that a part of the sensing group is further provided with a transmitter using a non-automatic return button switch, and further comprising a test switch for testing whether the upper-closed sensing group is operated. It is preferable.

In this case, the test switch is preferably a push button type switch, and is preferably connected in series with the sensing circuit.

The signal transmission unit generates a signal along with the position information of the transmitter unit and a fire circuit through the transmission circuit for transmitting the detection signal of the detection circuit to the position information generation circuit for transmitting the predetermined position information by the operator; And a location information generating circuit for transmitting to the unit.

Preferably, the transfer circuit further includes a feedback prevention circuit that prevents feedback due to signal generation by the signal generator.

The position information generating circuit uses an octal counter that sequentially sets the signal of the transfer circuit to a fixed temporal signal distribution.

The octal counter further includes a clock generation circuit for operation of the counter.

The signal generator is configured to transmit a fire detection signal generated by the double tone complex frequency generation circuit and the double tone complex frequency generation circuit to generate different double tones for each position information by the octal counter. It is made with a connection circuit for connecting.

The signal receiver may be configured to separate a fire detection signal received through the power distribution unit for each position of a double tone complex frequency, and to determine a location of a signal sending location and a position information obtained through the location separation circuit. And a switch circuit for transmitting to the display unit.

Preferably, the position separation circuit is further provided with a clock frequency generation circuit for the operation of the circuit, and it is preferable that up to two position information can be expressed.

The display unit may convert a double tone complex frequency signal from the position separation circuit into a general hexadecimal signal, and convert the hexadecimal signal from the double tone complex frequency reception circuit into a binary number. And a display circuit for visually displaying the position information represented by the binary conversion decimal number.

At this time, the display circuit is a seven-segment light emitting diode.

The movable part is connected in plural in parallel to the distribution part.

The receiver unit may further include an operation stop type power cut-off switch connected to a power distribution unit that stops the operation of the receiver unit, and further includes an operation check circuit that determines whether the receiver unit is operated.

On the other hand, well-known features and functions are not described in detail in order not to obscure the present invention, and the same terms are used in English initials or Korean interpretation terms for convenience of explanation and understanding.

1 is a circuit diagram of the transmitter of the automatic fire detection apparatus according to the present invention, and FIG. 2 is a circuit diagram of the receiver of the automatic fire detection apparatus according to the present invention.

As such, the automatic fire detection apparatus according to the present invention can be roughly divided into a transmitter unit for detecting a fire occurrence and a receiver unit for displaying a detected fire as an alarm. The transmitter unit may further include a detector group 50 that detects a fire occurrence and generates a fire detection signal and a transmitter 100, 110, 130 which transmits a fire occurrence signal to the receiver by a fire monitoring signal. The receiver unit includes a signal receiver 230 for receiving a fire occurrence signal transmitted from the transmitter unit, and a display unit 200 for visually displaying a position of a place where a signal is transmitted (analyzed by fire) by analyzing the fire occurrence signal. . The receiver section is composed of an LED indicator and a TR circuit for power supply of various types of actuator relays.

In the automatic fire detection device according to the present invention, instead of the current open type winding paper, which occupies 61.7% of the non-fire report, it uses a normal closed type detector 50 which is guaranteed to operate. In addition, a double tone complex frequency (DTMF) generation chip (IC ₇ of FIG. 1), which is very strong in electromagnetic noise (EMI) and adopts stabilized CMOS technology, is used.

The detector group 50 and the transmitter 100, 110, 130 of the transmitter unit should be installed wherever a fire may occur, and the receiver unit should be installed where a fire can be reported. Therefore, the receiver unit is connected to a plurality of detector groups 130 + transmitters installed at various positions. 9 is a block diagram showing the configuration of the automatic fire detection apparatus according to the present invention. As shown, the receiver unit 370 receives a fire occurrence signal from a plurality of detector groups + transmitters 310 and a plurality of transmitters 320. In addition, the receiver unit 370 analyzes the detected fire occurrence signal to determine a fire occurrence region, and the movable unit 240 of the hand base unit drives a fire pump 330 or a sprinkler pump 340 in the corresponding region. In addition, the movable unit notifies the occurrence of fire by driving the alarm 350 and the indicator 360.

Hereinafter, the configuration and operation of the transmitter unit and the receiver unit used in the present invention will be described with reference to FIGS. 1 and 2.

IC ₇ can generate four row tones and three column tones (100). IC ₇ can use the tone and number pads of the rows and columns to create the desired dual compound tones. The arrangement of the number plate and the corresponding frequency are shown in the arrangement of the two tone complex frequency generation chips used in the present invention of FIG. 3 and the frequency arrangement diagram of the number plate of the double tone complex frequency generation chip used in the present invention of FIG. Is shown. The keyboard form of the number plate as shown in FIG. 3 uses a keyboard of a general number plate having the configuration as shown in FIG. 5 or a keyboard of the number plate having the configuration as shown in FIG.

Allows duplication in ten numbers of 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 of the number plate shown in FIG. 3 and selects 3, 4 or 5 permutation) is equal to Equation 1, respectively.

3 cases: ₁₀ Π ₃ = 1,000

4 case: ₁₀ Π ₄ = 1,000

5 individuals: ₁₀ Π ₅ = 100,000

That is, in the case of Equation 1, the equipment can be operated by connecting the transmitter unit to 1,000, 10,000 or 100,000 units in one receiver unit. This means that a single transmitter can be assigned to each household so that a unique number can be assigned to each household (a good way to assign a house number to the apartment). Where the occurred).

In order to set a unique number in the transmitter, the signal generator 110 in FIG. 1 is (A), (B), (C), (D), (E), (F), (G), (H). ) Terminal is connected to any one of (C1), (C2), (C3), (R1), (R2), (R3) and (R4) of the transmission unit 100. The unique number of the transmitter unit varies according to the connection method of each terminal.

In FIG. 1, (M) and (N) are supplied from the power supply unit 250 of the receiver unit, (M) is a positive electrode (+), and (N) is a negative electrode (−). J and K are power sources for the next transmitter unit. That is, the transmitter parts are connected in parallel to the same wiring.

Automatic fire detection when there is no transmission signal from another transmitter connected to the above wiring and no transmission signal in the transmitter of FIG. 1, that is, when SS ₁ to SSn of the detector group 50 are all closed. The operation of the apparatus will be described.

Inverter IC ₁ when high (hereinafter, referred to as H) is applied to the emitter of TR ₁ of PNP type and H level is applied to the base of TR ₁ . The input level of is L (Low, hereinafter referred to as L), the output of inverter IC ₂ also becomes L level, and the level of input 1 of IC ₄ , which is a NAND gate, also becomes L. At this time, the output level of the inverter IC ₃ is H. After a time elapsed by a time constant equal to the values of R ₄ and C ₁ , the level of the input 2 of the IC ₄ also becomes H. Therefore, the output of IC ₄ becomes H, resets IC ₅ , and this chip is in the idle state. The input of analog switch AS ₅ is H level, and AS ₅ remains ON because it remains in the ON state. .

On the other hand, since L is applied to the input of IC ₈ , L is applied to input 1 of IC ₁₀ , which is a NAND gate. Since there is no transmission signal in the transmitter section other than the transmitter section in FIG. 1, there is no voltage output at the secondary coil of the input transformer T ₂ , and L is applied to the non-inverting input terminal of the OP amplifier OP ₁ , and the inverting input terminal is used. If the output voltage of OP ₁ is adjusted to L by adjusting the reference voltage applied to R ₇ and R ₈ , the output level of IC ₁₁ becomes H, which is applied to the two inputs of IC _10, the NAND gate, so that IC ₁₀ Outputs H. Therefore, PNP type output level of the TR ₁ As mentioned above, the base level of the TR ₁ is a H is the L, IC ₅ since the RES terminal level of the IC ₅ is an H reset is the idle state into the standby .

The signal generator 110 generates a clock pulse for enabling the counter of the IC ₅ to operate. The 40 Hz waveforms produced by R ₁₀ and R ₁₁ and C ₆ and C ₇ approximate square waves, so we add circuits IC ₁₅ , IC ₁₆ , R ₁₂ , R ₁₃ and C ₈ to produce a good clock pulse.

In order to generate a double tone complex frequency (DTMF) by connecting arbitrary row terminals and arbitrary column terminals of IC ₇ to each other, the connection time of IC ₇ must be kept longer than 23ms. Therefore, if the connection time is 25ms in consideration of safety, the frequency is 40Hz. That is, the frequency constant of the oscillation circuit of the IC ₇ and the capacitor are allowed to oscillate the frequency of 40Hz. When this square wave is made into a good pulse and supplied to the CLK terminal of IC ₅ , when the RES terminal is at L level, the counter operates when the clock pulse rises, so that the output terminal Q ₀ of IC ₅ is 25ms until the next pulse is applied. During high level, the analog switch AS ₁ is turned on. During the next 25ms, the Q ₁ output goes to H level, and this terminal is not used, so there is nothing to do. For the next 25ms, the Q ₂ terminal goes to H level and AS ₂ is turned on. After the same method, the following AS ₄ Q ₆ is connected to the output terminal during the ON 25ms IC ₅ is reset (RESET) goes to standby. The IC ₅ hours it takes to transmit the time, that is, four dual-tone multi-frequency corresponding to the digits until the RESET (25ms × 8) 200ms is a R ₄ and C ₁ can be obtained numerically selected.

Since RES terminal level of the IC ₅ is the H level, the output terminal of the IC ₅ are all L. Therefore, there is no input of IC ₇ so there is no output.

As such, when there is no transmission signal in the other transmitter section and no transmission signal in the transmitter section in FIG. 1, the IC ₇ is in a standby state while maintaining stability.

Next, a description will be given when there is no transmission signal from other transmitters connected to J and K, and there is a transmission signal only in the transmitter of FIG.

If any one of the detectors 50 of SS ₁ to SSn is opened due to an increase in the ambient temperature, the input level of the IC ₈ becomes H, and therefore the level of the input 1 of the NAND gate IC ₁₀ becomes H. .

On the other hand, when there is no output from the other transmitter, the output level of the IC ₁₁ is H (130). So, if the input level of the NAND gate IC ₁₀ each H, H output level is the L base (Base) level of the TR ₁ is the L TR ₁ is turned ON. Therefore, IC ₁ 's input level becomes H and LED ₁ lights up to indicate that TR ₁ is active. Yicheo alarm when the output level of the IC ₄ is L, IC ₅ operates to neunda up (Close) for a set time period for the analog switch AS ₁ to AS _4.

In addition, since the input level of the inverter IC ₁ is H, the output level of the inverter IC ₂ is H, and the level of the input 1 of the NAND gate IC ₄ is also H. As described above, the output level of the inverter IC ₂ when the detector groups SS ₁ to SSn are all closed, that is, in the standby state, is L. Therefore, when in the standby state, the output level of the inverter IC ₃ becomes H, and the level of the input 2 of the NAND gate IC ₄ becomes H. However, at present, one or more detectors are open, and TR ₁ is turned on, so the output level of IC ₂ is H. Therefore, the output level of IC ₃ is L, but input terminal 2 of NAND gate IC ₅ remains H because of time constants of R ₄ and C ₁ .

After a certain time constant, the output level of IC ₄ becomes L, the reset of the octal counter IC ₅ is canceled, and the counter of IC ₅ starts operation. The output level of IC ₄ is L and the RES terminal of IC ₅ is L. When the counter of IC ₅ is activated, the analog switches AS ₁ to AS ₄ remain ON for 25ms each. That is, for 200ms including the OFF period of AS ₁ to AS ₄ , the time constants of R ₄ and C ₁ are determined so that the RES terminal level of IC ₅ maintains L. On the other hand, the input level of the analog switch AS ₅ also becomes L, and the input of T ₂ is cut off.

Several numbers can be used in DTMF generation chips, but the main ones are A type matrix, number plate and 2-OF-8 number plate. Terminals (R ₁ ) to (R ₄ ) of IC ₇ are terminals of rows 1 to 4, and terminals (C ₁ ), (C ₂ ) and (C ₃ ) are terminals of a column.

If you press the number 1 on the number plate, the (C ₁ ) and (R ₁ ) terminals of the number plate will be connected so that the intrinsic tones of row 1 and the tones of row 1 are generated by the digital D / A converter built in IC ₇ . Synthesized in a manner.

Each tone of the row and column is mixed by the built-in OP amplifier to form a double tone complex frequency waveform and output. As shown in Fig. 3, when the (C ₂ ) terminal and the (R ₁ ) terminal are connected, the number 2, (C ₃ ) terminal and the (R ₁ ) terminal, the number 3, (C ₁ ) terminal and (R ₂ ) Number 4, (C ₂ ) terminal and (R ₂ ) Number 5, (C ₃ ) terminal and (R ₂ ) Side 6, (C ₁ ) terminal and number 7, (C ₃ ) ₂ ) If you connect terminal 8 to (R3) number 8, (C ₃ ) terminal to (R ₃ ) number 9 and (C ₂ ) terminal to (R ₄ ), double tone composite frequency (DTMF) waveform of number 0 is output from the output terminal Q of the IC _7.

By calculating a replicated permutation of ten to three numbers from 0 to 9, a three-digit duplicate permutation is calculated to form three thousand digits as shown in Equation 1. In other words, when a unique number is assigned to each household, it is possible to assign different numbers to 1,000 households. Since there is a unique number for each generation, the receiver detects the unique number through the double tone complex frequency waveform transmitted from IC ₇ and can know in which generation the fire occurred.

For example, when four numbers are selected from different ten values, that is, an automatic fire detection apparatus capable of assigning 10,000 unique numbers will be described.

Suppose you assigned number 2514 to the 25th-generation 14 of a high-rise apartment. When fire occurs in generation 2514, one of the detector groups (SS ₁ to SSn) of the transmitter installed in the generation opens. (Open) Then, as described above, the output terminals Q ₀ , Q ₂ , Q ₄ and Q ₆ of IC ₅ are at H level for the specified time, and AS ₁ , AS ₂ , AS ₃ and AS ₄ are closed for the specified time, respectively. (ON) Of AS ₁ , Terminal of the numeric keypad is (C ₂₎ terminal, AS ₁ Assuming that the terminals are connected to the (R ₁ ) terminals of the number plate, the dual tone complex frequency waveform corresponding to the two numbers is output from the output terminal Q ₀ of IC ₇ . AS ₂ In the numeric keypad (C ₂₎ and (R _2), the AS ₃ Is the numbers on (C ₁ ) and (R ₁ ) and AS ₄ If it is connected to (C ₁ ) and (R ₂ ) of the number plate respectively, the double tone complex frequency waveform corresponding to number 2514 is sequentially processed by the dual tone complex frequency waveforms of numbers 2, 5, 1 and 4 at the output terminal of IC ₇ . Is output. This 2514 number is passed to the receiver section and displayed on the 7-segment LED indicator 200 of FIG.

In fact, when the sensor group including the transmitter is installed in generation 2514, the following work should be done in advance so that the number 2514 can be displayed on the 7 segment LED indicator in case of emergency.

That is, the AS ₁ to the number 2 Connect the terminal to the (C ₂ ) terminal of the number plate, The terminal connects to the male (R ₁ ) terminal. Hereafter, for the number 5, AS ₂ Of the number plate (C ₂ ), AS ₂ Connect with (R ₂ ). For the number 1 the AS ₃ Of numbers (C ₁ ), AS ₃ Connect with (R ₁ ) on the number plate. AS ₄ for the number 4 Of the dial (C ₁ ), AS ₄ Connect (R ₂ ) on the number plate and install transmitter part in unique position (corresponding to unique number 2514). Then, when a fire occurs, the transmitter transmits the waveform corresponding to 2514 to the receiver, and the receiver displays the number 2514 on the display. Observers can immediately recognize that a fire has occurred in Unit 2514 and take necessary action.

The output signal from output terminal Q of IC ₇ is the common wiring of signal and power through C ₂ , T ₁ and C ₃ . At the same time is applied to the input to the receiver unit AS _5, C _5, and when the transmission signal is returned (Feed-back) via the T _2, the level of the input 2 of the IC ₁₀ is the L output level of the IC ₁₀ is the H , TR ₁ is turned OFF to stop operation. Therefore, at the output terminal Q of IC ₇ , the double tone complex frequency corresponding to the number 2514 cannot be output and the receiver is malfunctioned.

It is the analog switch AS ₅ that prevents this from happening. That is, one of the detectors is open, TR ₁ is turned on, and as described above, the output level of the NAND gate IC ₄ is L for the time required to transmit four numbers. As a result, AS ₅ is turned off so that the feedback signal cannot reach C ₅ and is not affected by the signals it sends. In other words, the operation of all circuits is stable.

7 is a double tone waveform diagram of one row and one column by the dual tone composite frequency generating chip according to the present invention. As shown, the correct tone frequency is made by XTAL1 (3.579545 MHz) attached to IC ₇ and the output of the Q terminal is co-wired for signal and power through output transformer T ₁ and coupling capacitor C ₃ . It is delivered to and received by the receiver.

This time, the operation of the automatic fire detection apparatus according to the present invention will be described when there is no transmission signal in the transmitter of FIG. 1 (that is, no transmission signal of its own) and transmission signal in another transmitter.

In the transmitter section of FIG. 1, since the sensor groups SS ₁ to SSn are all closed, the input level L of the IC ₈ , and therefore the input level of the input 1 of the IC ₁₀ is also L. FIG.

Joint wiring for signal and power The other transmitter unit transmitted signal is the analog switch AS ₅ is ON since the output level of the IC ₄ in the absence of a transmission signal of the magnetic self-H as described above, the OP amplifier OP ₁ through C ₅ and T ₂ Is approved.

The transmission signal from the other transmitter is applied to OP ₁ through AS ₅ , C ₅ , T ₂ , diode D ₁ , R ₉ and C ₄ , and the output level of OP ₁ becomes H so that input 2 of NAND gate IC ₁₀ The input level of becomes L. Therefore, the output level of IC ₁₀ becomes H, so that the collector level of TR ₁ (PNP type) becomes L, and eventually the output level of IC ₄ becomes H, so that IC ₅ maintains the reset state.

Therefore, when there is a transmission signal from another transmitter and there is no transmission signal from the transmitter section of FIG. 1, the transmitter section of FIG. However, the transmission signal from another transmitter is input to the receiver section without any obstacle.

Next, a description will be given of the case where a transmitter of the detector group is opened in the transmitter section of FIG. 1 and a fire occurrence signal is transmitted from another transmitter section while a transmission signal is output from the output terminal Q of the IC ₇ .

First transmitter additional input 1 is input level is in the standby state NAND gate IC ₁₀ opens, the detector is there is a H, a moment input from the T ₂ trans because there is no transmission signal in the other transmission base is not the IC ₁₀ The input level of input 2 is H. Therefore, the output level of IC ₁₀ becomes L and TR ₁ operates, and the output level of IC ₄ becomes L (200ms) during the planned time, so that IC ₅ and IC ₇ operate to transmit the signal. To apply. While transmitting, i.e., while the RES terminal level of IC ₅ is L, the switch of AS ₅ is in the OFF state, so the transmission signal from the third transmitter It was applied to songmin and power is cut off from the common wiring even Manda AS _5. Therefore, the transmission signal transmitted from the transmitter of FIG. 1 can complete transmission without any interference.

On the other hand On the other transmitter part position, the base is already another sonsin before he has bet a transmitted signal because there was already transmitted (in this case the first transmission contribution degree) the transmission signal (transmission signal degrees of claim 1) is a magnetic songsingiyi AS _5, After the output level of OP ₁ is set to H through C ₅ and T ₂ , and the input level of IC ₁₀ is set to L, the input level of IC ₁₀ is 1 because one of the detectors of the magnetic transmitter has already been opened. H. Therefore, the output level of IC ₁₀ , whose self-transmitter is a NAND gate, becomes H and does not work as when TR ₁ is still waiting. Thus IC ₅ and IC ₇ do not work, even if one of the detectors is open, as if it were in standby while another transmitter was already transmitting.

However, when the transmitter unit transmits four numbers before the transmitter itself, the signal wiring and the power supply wiring Since there is no signal applied to the transmitter, the magnetic transmitter has an output level of OP ₁ of L, the input level of IC ₁₀ becomes H, and the base level of TR ₁ becomes L. Thus TR ₁ is active and IC ₇ outputs Q sequentially transmitting the double-tone complex frequencies of the specified number.

As described above, the transmitter unit automatically detects the occurrence of the load and notifies the receiver unit of the location of the fire. However, when someone finds a fire and wants to quickly announce a fire alarm, he must send a fire signal to the receiver manually using the transmitter.

However, transmitters referred to in the Ministry of Internal Affairs Directive No. 446, 86. 7. 19. (Rules for Standards and Inspections of Fire Protection Machinery, Machinery, etc.) are not shown in Figs. However, in the transmitter of FIG. 1, if a push button switch (PBS) of non-automatic return type is installed in place of the sensor group and a unique number is assigned to each transmitter, each switch has a unique number. Will be.

That is, if the person who found a fire just presses the PBS of the transmitter installed in the element once, the unique number to know the position of the transmitter is displayed on the LED indicator of the receiver so that the monitor knows the location of the fire. Take appropriate action.

9 shows an automatic detection device including a detector group and a transmitter according to the present invention. As shown, one detector group + transmitter 310 or one transmitter 320 are each installed in any place, and transmits a fire occurrence signal to the receiver. The detector group + transmitter automatically detects the fire and generates a fire signal, while the transmitter manually generates a fire signal.

In this case, since many (10,000, 1,000,000) unique numbers can be transmitted, the fire detection apparatus according to the present invention is not limited to the number of detector groups + transmitters and transmitters, and can be installed in any desired place. Can be.

Hereinafter, a description will be given of a process in which the dual tone complex frequency waveform output from the transmitter is transmitted to the receiver unit.

A four-digit unique number (e.g., 2514) transmitted from any generation of transmitters or transmitters is a dual-tone complex frequency waveform applied to the common wiring 120 for signals and power, and via a coupling capacitor C ₉ (FIG. 2). It is applied to the primary coil of the input transformer T ₃ .

Of the T ₃ of the signal receiver 230 of FIG. ₂ , one of the two secondary coils is input to the clock terminal CLK of the octal counter IC ₃₄ as a pulse corresponding to the double tone complex frequency. The output of IC ₃₄ accompanying this pulse sets the level of output terminals (Q ₀ to Q ₇ ) to H to turn on the corresponding analog switch (one of AS ₆ to AS ₁₃ ) and the other to C ₁₀ . The dual tone complex frequency signal received through is applied to the input terminal K of the IC ₂₆ to IC ₃₃ through an AS (one of AS ₆ to AS ₁₃ ) turned on by the output Q of the IC ₃₄ .

While receiving a dual tone complex frequency waveform, select R ₁₆ and R _{17 so} that the output level of OP ₂ becomes H, and the time constant of C ₁₁ and R ₁₅ is the output level of the D ₂ diode for the longest wavelength (697 Hz). Set to a number that can be expressed as H. As described above, the period in which the signal of the dual tone complex frequency is present is 120ms, and the signal-free period between signals is also 120ms. In other words, one cycle is 240 ms. Here too, OP ₂ is used as a comparison function, and it is IC ₃₅ light IC ₃₆ that reinforces this to make a suitable square wave. Therefore, the square wave of the shaped double tone complex frequency is sequentially input to the CLK terminal of IC ₃₄ .

If a dual-tone complex frequency waveform corresponding to 2514 is now received through C ₉ at any transmitter, first consider what role the dual-tone compound frequency waveform corresponding to the number 2 received first plays after T ₃ . First, when OP ₂ output level H is input to the CLK terminal of IC ₃₄ , the counter operates at the clock rise, and the output terminal Q ₀ becomes H and AS ₁₀ is turned on. On the other hand, the dual tone complex frequency of the number 2 through C ₁₀ is input to the input terminal K of the IC ₃₀ of the DTMF receiver 220 via AS _{10 turned on,} and then the IC ₃₀ uses the dual tone used in the present invention of FIG. The receiver chip for the signal by the complex frequency outputs the output terminals Q ₁ to Q ₄ in hexadecimal notation as shown in the operating truth table.

However, since the BCD-7 segment driver (IC ₁₇ to IC ₂₄ ) is valid only for input of binary coded decimal (BCD), in order to convert this hexadecimal output to BCD, the decimal conversion unit 210 ) Interpose a NOR gate (IC ₂₅ × 8). In this manner, the switch to the BCD in the binary conversion unit 210, the output is input to the IC _21, the output of the IC ₂₁ will strike the 7-segment LED display apparatus 5 of the display section 200. The In this case, the number 2 is displayed.

On the other hand, at the same time as the reception of the double tone complex frequency of number 2, the CLK terminal level of IC ₃ 4 becomes L, the level of output terminal Q ₀ becomes L, and AS ₁₀ becomes OFF. When the next dual tone complex frequency signal (in this case, DTMF of number 5) is received, IC ₃₄ outputs an H level to Q ₁ to turn on AS ₁₁ , as in the case of receiving the double tone complex frequency of number 2 above. The number 5 is displayed on the 7 segment LED indicator 6. In this way, a dual tone complex frequency waveform of all four digits (2514 in this case) is received and the numbers of 2, 5, 1 and 4 are displayed on the 7 segment LED indicators 5-8, respectively.

A dual tone complex frequency signal of the first digit of the four digits (in this case, the number 2) is received and the signal applied to the CLK terminal of IC ₃₄ simultaneously turns on the AS ₁₄ with the input level H of SA ₁₄ . As a result R ₂₀ and R ₂₁ are connected to each other, the bias of the TR ₂ and TR ₃ of the flow a of the SCR ₁ gate trigger current (I _G) to SCR ₁ is ON, at the same time that the LED ₂ light moving section 240, normal Both NPN type TR are turned ON. Therefore, if a starting mechanism such as a pump, a bell, a indicator, or the like is connected to TER ₁ and TER ₂ of the movable unit 240, the circuit is closed to operate each mechanism. Movable parts easy expansion is possible, and if necessary using the switch RS ₁ will be OFF for the operation of the SCR _1. TER ₁ and TER ₂ can operate various mechanisms (pump, alarm, indicator lamp) by adding circuits such as TR ₄ , TR ₅ , and TR ₆ as necessary.

While 2514 is being displayed on the LED indicators 5 to 8 of the display unit 200, if a four-digit 1637 double tone complex frequency is received via C ₉ from the other transmitter unit, the first double tone compound frequency signal (in this case, number 1). ) Turns on AS ₆ with the output level of output terminal Q ₄ of IC ₃₄ as H, while the dual tone complex frequency signal of number 1 via C ₁₀ is applied to input terminal K of IC ₂₆ via AS ₆ . And the number 1 on the 7 segment LED indicator 1 as described above. In this way, the LED indicators 1 to 4 are numbered 1637 respectively.

If a four digit double tone compound frequency is received from another transmitter, the received double tone compound frequency is displayed on LED indicators 5-8. Hereinafter, since the four-digit dual tone complex frequency signal continuously inputted as described above may be sequentially displayed on the LED indicator, all the dual tone complex frequency signals input at a very small microsecond difference may be displayed.

In the above description, the present invention has been described and limited by way of example with reference to the drawings, but it is obvious that various changes and modifications can be made by those skilled in the art without departing from the technical spirit of the present invention. something to do.

Accordingly, the present invention should not be construed as limited to the specific forms mentioned in the specification, but rather the invention as defined by the appended claims, including all modifications, equivalents, and modifications within the spirit and scope of the invention. It should be understood to include substitutes.

The present invention, which operates as described above, uses a normally closed (NC) contact for the detector, so that the top of the (NO) detector is functional due to a poor electrical contact caused by an impurity film and oxidation formed on the contact. Accidents can be completely prevented in advance, so there is no fire or malfunction.

With only two wires, all the power can be supplied and the fire signal can be transmitted / received, so the amount of wiring is smaller and the connection point is less than that of the existing equipment, and it is economical, and there is no fear of confusion. The connection point of the wire is also significantly reduced, which eliminates the noise source. In addition, accidents due to poor contact of the connection is also significantly reduced, there is an effect to prevent non-fire or malfunctions in advance. It is also economical because the total amount of wiring is much smaller than that of the current device.

In addition, the total unit cost (total unit cost / total number of possible signal generation), that is, the unit cost per signal that can be generated is significantly cheaper.

The dual tone composite frequency (DTMF) generating chip, which is very resistant to the generation or influx of various noises, is a matrix system.The chip uses the intrinsic tonal output of the row and column to synthesize each other. When calculating by the redundant permutation method, only one receiver unit (one DTMF receiving chip) can give a unique number to each of 10,000 units.

The output of the DTMF generating chip is transmitted in the frequency of the audible frequency band, and the DTMF receiving chip also excludes various noises and is complementary to the DTMF generating chip so that only the transmission signal can be received accurately. .

The receiver part of the automated re-detection system is equipped with a 2-digit 7-segment LED indicator, so that fire signals generated from multiple generations such as A, B, and multiple generations are sequentially displayed on the LED indicator to receive only one. It can be processed at the base.

Claims (7)

An automatic fire detection system for notifying of a fire, comprising: a transmitter unit generating a fire occurrence signal having a double tone complex frequency type indicating a unique number when a fire occurs; A receiver unit for determining a position of the transmitter unit generating a fire occurrence signal by analyzing a double tone complex frequency of an allodine fire occurrence signal from the transmitter unit; And a distribution unit for supplying power in parallel to each of the transmitter units located in an arbitrary region and transmitting a fire generation signal to the receiver unit. The automatic fire detection apparatus according to claim 1, wherein the power distribution unit has two strands of wires which are used for the transmission of a fire occurrence signal and power supply and have two wires connecting all transmitters in parallel. . The apparatus of claim 1, wherein the transmitter comprises: a detector configured to generate a fire detection signal when detecting a fire occurrence; A signal generator for generating a signal for generating a double tone complex frequency waveform when receiving a fire detection signal; And when receiving the signal transmitted from the signal generator, a dual tone complex frequency waveform type representing the unique portion of the transmitter comprising a transmission unit for generating a fire generating signal and transmitting to the distribution unit, using a dual tone complex frequency generation chip Automatic fire detection device. The automatic fire detection apparatus according to claim 3, wherein the detection unit comprises a normally closed detector group for automatically detecting a fire occurrence. 4. The automatic fire detection apparatus according to claim 3, wherein the detection unit comprises a manual transmitter using a non-automatic return type push button switch. The apparatus of claim 3, wherein the receiver unit comprises: a signal receiving unit configured to receive a fire occurrence signal in the form of a double tone complex frequency waveform through a distribution unit; DTMF receiver for generating position information by analyzing the dual tone composite frequency waveform received by the signal receiver; A decimal conversion unit for converting the position information into a decimal form for driving the display unit; And a display unit for visually displaying the position information converted into the hexadecimal form, the automatic fire detection apparatus using the dual tone complex frequency generation chip. 7. The apparatus of claim 6, wherein the receiver unit further comprises a movable unit for activating the equipment for extinguishing the fire by the fire generating signal in the form of a double tone complex frequency waveform received by the signal receiving unit. Fire detection device.