KR20040045077A - Gas alarm system - Google Patents

Abstract

PURPOSE: A gas alarm system is provided to prevent previously an accident due to the leakage of gas by performing a visual and an audio warning process using a green, a yellow, and a red color lamp and the alarm sound. CONSTITUTION: A gas alarm system includes a power supply unit(10), a gas detection unit(20), a temperature detection unit(30), a power monitoring unit(50), a memory, and a clock generation unit(70). The gas alarm system further includes a control unit, an alarm sound generation unit, and a state display unit. The control unit(40) output a control signal to detect the leakage of gas, display visually an abnormal state and a dangerous state according to the leaking of gas and output the alarm sound in the dangerous state. The alarm sound generation unit(80) generates the alarm sound according to the control signal of the control unit. The state display unit(90) displays a power state of the power supply unit, the abnormal state, and the dangerous state as a green color lamp, a yellow color lamp, and a red color lamp, respectively.

Description

Gas alarm system

The present invention relates to a gas alarm device, and more particularly, a gas alarm for a three-dimensional gas leak warning by visually warning by lighting a red lamp and sounding an alarm by sounding a gas leak. It's about the device.

In general, a gas alarm device automatically raises an alarm when a harmful gas leaks or the leaked gas exceeds a certain concentration limit, so that an alarm is provided to ensure safety and proactive measures against the health, fire, and explosion of the worker. Say.

Recently, city gas, LNG, LPG gas, etc. are widely used for industrial or home use. Since these gases are colorless, tasteless, and odorless, users or workers cannot detect gas leaks in advance, as well as gas explosion and fire. This can result in personal injury and property damage.

Therefore, conventionally, the principle of increasing conductivity when gas is adsorbed on the surface is applied, or the temperature is raised when the gas is touched, and the principle of changing the electrical resistance is applied to detect the amount of leakage of explosive and harmful gases, and set the detected amount of gas. In case of leaking more than the standard gas amount, a gas alarm device is used to alert the operator or user by sounding a beep sound.

However, the conventional gas alarm device simply notifies the user or operator of the gas leak because it simply alarms the gas leak with an alarm sound like a buzzer. Also, since the alarm is limited to the buzzer sound, a wider alarm is generated. There was a problem that could not be supported.

The present invention has been made in view of the above-described problems, the object of which is to sound a warning by audible alarm when the gas leaks and at the same time by lighting a red lamp to visually warn the gas alarm more three-dimensional alarm It is to prevent explosion and fire due to gas leakage in advance.

1 is a block diagram showing a gas alarm apparatus according to an embodiment of the present invention.

2 is a detailed circuit diagram illustrating a gas alarm apparatus according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: power supply unit 20: gas detection unit

30: temperature detection unit 40: control unit

50: power monitoring unit 60: memory unit

70: clock generator 80: warning generator

90: status display unit IC1: first regulator

IC2: Micro process IC3: Second regulator

IC4: Rom T1: Transformer

BD1: Bridge diode TH: Thermistor

VR1: First variable resistor BZ: Buzzer

L1: Green LED L2: Red LED

L3: Yellow LED D1, D2: Diode

C1 to C13: condenser R1 to R15: resistance

Q1: first transistor Q2: second transistor

The configuration of the present invention for achieving the above object is made as follows.

A gas detector, which is driven by a power supply supplied from a voltage supply unit, detects a leaked gas and outputs an electrical signal corresponding thereto, a temperature detector that detects a temperature of the gas detector and compensates for the temperature, and a power state of the power supply unit In the gas alarm device comprising a power monitoring unit for outputting an electrical signal corresponding to the detection of abnormal power is supplied, a memory unit for storing various programs necessary for operation, and a clock generator for generating a reference clock ,

A control unit which detects a leaked gas amount, and visually displays an abnormal state, a dangerous state, etc. according to the leaked gas amount, and outputs a control signal for audible warning at the same time as a visual indication in a dangerous state;

A warning sound generating unit for sounding a warning sound to warn of a dangerous state when a gas leaks according to a control signal applied from the control unit;

The power state supplied to the power supply unit is displayed in green, the abnormal state due to gas leakage is displayed in yellow according to the control signal applied from the control unit, and the dangerous state is displayed in red at the same time as the warning sound generation of the warning sound generating unit. It characterized in that it comprises a status display.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a gas alarm apparatus according to an embodiment of the present invention.

2 is a detailed circuit diagram illustrating a gas alarm apparatus according to an embodiment of the present invention.

As shown in Figure 1, the gas alarm device of the present invention converts the power supplied from the outside to output a DC power supply unit 10, and a gas detector for detecting the gas leaked to the outside and outputs a corresponding electrical signal 20, a temperature detector 30 that detects the temperature of the gas detector 20 and compensates the temperature, and compares / analyzes the signals applied by the gas detector 20 and the temperature detector 30 to leak the gas. And a control unit 40 for visually displaying an abnormal state, a dangerous state, etc. according to the amount of leaked gas, and outputting a control signal for an audible warning at the same time as the visual display in case of a dangerous state, and the power supply unit. The power monitoring unit 50 for initializing the control unit 40 when abnormal power is detected by detecting the power state of the storage unit 10, and various programs for operating the control unit 40 are stored. A warning sound that sounds an alarm when gas is leaked according to the memory unit 60, the clock generator 70 generating a clock necessary for the operation of the controller 40, and a control signal applied from the controller 40. The power supply to the unit 80 and the power supply unit 10 is displayed in green, the abnormal state due to gas leakage is displayed in yellow according to the control signal applied from the controller 40, and the warning sound is generated. At the same time as the warning sound of the unit 80 is composed of a status display unit 90 for displaying a dangerous state in red.

The power supply unit 10 includes a transformer T1 for reducing the AC voltage input from the outside according to the winding ratio, a bridge diode BD1 for converting the transformed AC voltage into a DC voltage, and a constant output voltage regardless of the load change. And a plurality of capacitors C1, C2, C3, C4, C5 and C6 for smoothing the input voltage.

The gas detector 20 causes a temperature rise when it comes into contact with the gas, and is connected to one side of the gas sensor GS and an electrical resistance variable according to a temperature change and one side of the gas sensor GS, and adjusts the gas content arbitrarily. A first resistor R1 for outputting a voltage corresponding to the gas amount, a plurality of resistors R2 and R3 for dividing the input voltage, and a capacitor C7 for charging and discharging the input voltage.

The temperature detector 30 detects the temperature of the gas sensor GS and detects an abnormal state such as an inconsistent current supply or poor thermal conductivity, and is connected in series with the thermistor TH. The first variable resistor VR1 compensates for the heat generated by the gas sensor GS and a bypass capacitor C8 connected in parallel with the thermistor TH to charge and discharge the input voltage.

The controller 40 compares / analyzes the signals applied from the gas detector 10 and the temperature detector 20 to light a lamp and output a control signal for generating a warning sound, and the microprocessor A switch SW1 connected to one terminal of the process IC2 and outputting a reset signal for testing or restarting, and a plurality of resistors R4 and R5 connected in parallel with the switch SW1 to divide the input voltage. Consists of

The power monitoring unit 50 is connected to the second regulator IC3 that constantly outputs the input voltage regardless of load variation, and the sixth resistor R6 connected in parallel to the second regulator IC3 to divide the input voltage. ) And a bypass capacitor C9 connected in parallel with the second regulator IC3 to charge and discharge the input voltage.

The memory 60 performs a data memory auxiliary function of the micro process IC3, and is connected to a ROM IC4 in which various operating programs are stored and connected to one side of the ROM IC4 to charge and discharge an input voltage. And a seventh resistor R7 connected in series with the capacitor C10 and the ROM IC4.

The clock generator 70 includes an oscillator 71 for oscillating a predetermined frequency, for example, a 4 MHz crystal, and a pair of capacitors C11 and C12 connected in parallel with the oscillator 71.

The alarm sound generator 80 may include a first transistor Q1 switched according to a control signal output from the micro process IC2 and a second transistor Q2 switched according to a signal applied to the first transistor Q1. ), A buzzer (BZ) that sounds an audible sound at a volume of 85 DBmin, and a parallel connection with the second transistor (Q2) according to the switching of the first transistor (Q1) and the second transistor (Q2). And a plurality of resistors R8 and R9 for dividing an input voltage, a first diode D1 connected in series with one side of the second transistor Q2, and a first transistor connected in series with the first transistor Q1. It consists of 10 resistors (R10).

The warning display unit 90 includes a green LED L1 indicating a power supply state, a red LED L2 indicating a warning state by lighting according to the switching of the first transformer Q1, and the micro process IC2. A yellow LED (L3) that lights up according to a control signal applied from the LED to indicate an abnormal state, and a plurality of resistors (R11, R12, R13) that divide the input voltage by being connected in series and in parallel with the LEDs (L1, L2, L3). , R14, R15).

Referring to Figure 2 the operation of the gas alarm of the present invention made as described above are as follows.

First, the power supply unit 10 reduces the power input from the outside through the transformer T1, rectifies the voltage reduced by the transformer T1 by the bridge diode BD1, and outputs a DC power.

At this time, the status display unit 90 by applying the power supplied from the power supply unit 10 to the green LED (L1) through the twelfth resistor (R12) to turn on to indicate the on / off state of external power to the user or operator do.

Then, when the explosive and harmful gas leaks, the gas sensor (GS) of the gas detection unit 20 is in contact with the gas to cause a rise in temperature, the electrical resistance is changed according to the rise in temperature to control the corresponding electrical signal 40 Output to the micro process IC2).

At this time, the micro process IC2 analyzes an electrical signal applied from the gas sensor GS to calculate a leak gas amount, and then compares the leak gas amount with a reference gas amount set therein, and the leak gas amount is equal to the reference gas amount. If a predetermined ratio falls within the control signal for warning the abnormal state is output to the status display unit 90, and if the leaked gas amount is greater than the reference gas set inside the control signal for warning the dangerous state 80 Output to

For example, if the leaked gas is LNG and the reference gas amount set therein is 5000 ppm, if the leaked gas amount is 4000 ppm to 5000 ppm, a control signal for warning the abnormal condition is output; Output a control signal.

Subsequently, when the microprocessor IC2 outputs a control signal for warning of an abnormal state, the state display unit 90 lights up a yellow LED L3 to indicate to the user or operator that the abnormal state is caused by a gas leak.

However, when the microprocessor IC2 outputs a control signal for warning of a dangerous state, the warning sound generator 70 switches the first transistor Q1 according to a control signal to turn on, and the second signal is turned on. When the first transistor Q1 is 'turned on', the second transistor Q2 is 'turned on' to operate the buzzer BZ and to turn on the red LED L2 of the status display unit 90.

Therefore, the user or the operator can know that the dangerous state due to gas leakage visually or audibly through the buzzer sound generated by the warning sound generating unit 70 and the red LED L2 that is turned on in the status display unit 90.

As described above, the present invention is classified into an abnormal state, a dangerous state, and the like according to the amount of gas leaked, and in an abnormal state, a yellow LED is turned on, and in a dangerous state, a buzzer sounds to sound an audible warning and a red LED By turning on and visually displaying, the user or operator can give a gas leak warning in three dimensions and prevent explosion and fire due to gas leakage.

Claims (4)

A temperature which is driven by the power supplied from the voltage supply unit 10 and detects the leaked gas and outputs an electrical signal corresponding thereto, and a temperature for detecting the temperature of the gas detector 20 to compensate for the temperature The detection unit 30, the power monitoring unit 50 for detecting the power state of the power supply unit 10 and outputs an electrical signal corresponding to abnormal power supply, and various programs for operation In the gas alarm device comprising a memory unit 60 and a clock generator 70 for generating a reference clock, A controller 40 which detects a leaked gas amount, and visually displays an abnormal state, a dangerous state, etc. according to the leaked gas amount, and outputs a control signal for audible warning at the same time as the visual indication in the case of a dangerous state; A warning sound generating unit (80) which sounds a warning sound to warn of a dangerous state when gas is leaked according to a control signal applied from the control unit (40); The power state supplied to the power supply unit 10 is displayed in green, the abnormal state due to gas leakage is displayed in yellow according to the control signal applied from the control unit 40, and the warning sound of the sound generating unit 80 is displayed. Gas alarm device, characterized in that it comprises a status display unit 90 to display a dangerous state in red at the same time of occurrence The microprocessor of claim 1, wherein the controller 40 compares / analyzes signals applied from the gas detector 10 and the temperature detector 20 to light a lamp and output a control signal for generating a warning sound. And a switch SW1 connected to one terminal of the micro process IC2 and outputting a reset signal for testing or restarting, and a plurality of voltages connected to the switch SW1 in series and in parallel to divide the input voltage. A gas alarm device, comprising two resistors (R4, R5). The method of claim 1, wherein the alarm sound generating unit 80 is a first transistor (Q1) is switched according to the control signal output from the micro process (IC2) and the signal applied from the first transistor (Q1). The second transistor Q2 switched according to the switching, the buzzer BZ which sounds an audible sound with an audible sound according to the switching of the first transistor Q1 and the second transistor Q2, and the second transistor Q2 directly. A plurality of resistors R8 and R9 connected in parallel to divide the input voltage, a first diode D1 connected in series with one side of the second transistor Q2, and a series of the first transistor Q1 Gas alarm device comprising a tenth resistor (R10) connected. The method of claim 1, wherein the status display unit 90 is a green LED (L1) indicating the power supply state, a red LED (L2) is lit in accordance with the switching of the first transformer (Q1) to indicate a dangerous state, A yellow LED L3, which is lit according to a control signal applied from the micro process IC2 and indicates an abnormal state, and a plurality of resistors connected in series and in parallel with the LEDs L1, L2, and L3 to divide an input voltage. A gas alarm device comprising (R11, R12, R13, R14, R15).