CN2184928Y - Portable strong sound and light gas double point alarm - Google Patents
Portable strong sound and light gas double point alarm Download PDFInfo
- Publication number
- CN2184928Y CN2184928Y CN 93210281 CN93210281U CN2184928Y CN 2184928 Y CN2184928 Y CN 2184928Y CN 93210281 CN93210281 CN 93210281 CN 93210281 U CN93210281 U CN 93210281U CN 2184928 Y CN2184928 Y CN 2184928Y
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- unit
- sound
- alarm
- output terminal
- trigger
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Abstract
The utility model relates to a portable strong sound and light gas double-point alarm device which is mainly composed of a measuring unit, a comparison trigger unit, a voltage stabilization unit and a sound and light alarm unit and is provided with a zero drift indicating circuit, wherein, after measuring signals of the zero drift indicating circuit is amplified by a comparison trigger circuit, trigger signals are conveyed to the sound and light alarm unit so as to alarm. Because the comparison trigger unit performs in a double-point comparison trigger way, the comparison trigger unit can respectively send out alarm bell sound and alarm whistle sound to alarm when the gas density in air reaches 1% a 1.5 %. A power amplifier pole of the sound and light alarm unit is connected with a boosted circuit so as to increase the output power of a loudspeaker, and uses high-brightness luminous diodes so as to realize strong light alarm so that the purposes of portability and use in the whole working face.
Description
The utility model relates to a kind of warning device that can detect control to inflammable gas.Particularly a kind of gas alarming device that is suitable for using in the mine.
Usually, large-scale mine mostly adopts fixed gas-warning device, though it is better that this class device detects effect, but price comparison costliness, because portable gas explosion detection alarm device has cheap, advantage such as easy to use, so, extensively adopted by middle-size and small-size mine, this class detection alarm device circuitry generally is by measuring unit, compare trigger element, mu balanced circuit unit and acousto-optic warning unit four parts constitute, because circuitry is a point measurement, so it is the warning that quits work that alarm sound can not divide, still withdraw warning, simultaneously, because it is lower to drive the power amplifier offset voltage of loudspeaker, so, chimes of doom is less, only can use for the individual, and can not be shared for whole face, its use face is narrower.
The purpose of this utility model is to provide a kind of to be had the warning of quitting work and withdraws warning, and the warning acousto-optic is stronger, can be for the portable strong acoustooptic gas two point warning device of whole face use.
The utility model is achieved in that circuitry mainly is made of measurement, relatively triggering, voltage stabilizing, four unit of sound and light alarm.Measuring unit is a whiston bridge circuit, gage beam is made up of carrier catalyst element and carrier compensating element,, when tested gas contact measurement arm, its internal resistance is changed, make electric bridge that voltage signal output be arranged, relatively the trigger element input end is connected with the output terminal of metering circuit, relatively trigger element has two the tunnel to compare trigger circuit, can two concentration point of tested gas be detected, every road all is to be made of an amplifier and the comparison trigger that is connected with amplifier, and wherein one tunnel amplifier gain is higher than another road Amplifier Gain, the output terminal of gain bigger a tunnel is serially connected with a switching tube, be used for controlling the conducting of acousto-optic warning unit, relatively the trigger element output terminal is connected with the acousto-optic warning unit input end, acousto-optic warning unit medium frequency oscillator is the double frequency oscillation device, it is connected with loudspeaker by a power amplifier, the different frequency signal of double frequency oscillation device output can make loudspeaker send the different sound＜be that alarm bell sound and police whistle sound＞power amplifier are connected with a voltage tripler, thereby increase the output power of power amplifier, make loudspeaker send the strong sound, the illuminating circuit that is provided with in the acousto-optic warning unit is made up of multivibrator and high brightness LED, when one tunnel triggering driving switch pipe, when loudspeaker sends the sound, the multivibrator starting of oscillation, drive two light emitting diodes and alternately send flicker ruddiness, realize the strong acoustooptic warning.Voltage regulation unit adopt have overheated, overcurrent, the low pressure reduction integrated package of pressure-stabilizing of input voltage reverse connecting protection function; with stablizing of effective assurance operating voltage; the output terminal of metering circuit is connected with a zero point drift indicating circuit; when catalysis element sensitivity reduces " 0 " drift, can and adjust by this circuit diode displaying.Under-voltage indicating circuit is made of the light emitting diode that comparer and comparator output terminal connect, its input end is connected with power supply, and another input end is connected with circuit output end of pressure-stabilizing, when supply voltage is lower than the regulation operating voltage, the comparator circuit action, diode displaying.
In conjunction with the accompanying drawings the utility model is described in detail below by embodiment:
Accompanying drawing is the utility model circuit theory diagrams.
The utility model test cell is a whiston bridge circuit, and the gage beam of electric bridge is by carrier catalyst element S
2With carrier compensating element, S
1And adjustment resistance R
1Form, the auxiliary brachium pontis of electric bridge is by resistance R
3, R
4Constitute with regulator potentiometer RP, its output terminal Z, O pass through resistance R respectively
5, R
6With amplifier N
2-1 input end 2,3 connects, and passes through resistance R respectively
7, R
8With amplifier N
2-313,12 connections of input end, trigger N relatively
2-48 base stages with switching tube VT of output terminal are connected, and switching tube VT collector meets double frequency oscillation device N
41 point, emitter connects power cathode, reports to the police and the conducting of illuminating circuit is controlled by switching tube VT.Amplifier N
2-11 of output terminal and trigger N relatively
2-2 Input end 5 connects, and 7 of output terminals connect double frequency oscillation device N4 input end 6, and double frequency oscillation generator output end 3 passes through capacitor C
1With power amplifier N
63 connections of input end, power amplifier N
6Output terminal 5 passes through capacitor C
2, C
3Connect loudspeaker B, illuminating circuit by multivibrator N
7And light emitting diode V
5, V
6Etc. formation, and be connected between positive source and the switching tube VT collector.Voltage tripler is by integrated package N
5Inductance L, diode V
4Realize, after this circuit adds power supply, just can be at diode V
4Negative pole output be three times in power source voltage, its output terminal diode V
4Negative pole and power amplifier N
66 ends connect.Mu balanced circuit is mainly by low pressure reduction integrated package of pressure-stabilizing N
3Realize, and have functions such as overheated overcurrent, input voltage reverse connecting protection that 4 of its input ends pass through battery main switch SA
-2Resistance R X is connected with power supply G.
The zero point drift indicating circuit is mainly by comparer N
1-1And the light emitting diode V that is connected 1 of comparator output terminal
1, V
2Constitute, the input signal of zero point drift is taken from measuring unit output terminal O, Z 2 points.Under-voltage indicating circuit is mainly by comparer N
1-2, be connected comparer N
1-2The light emitting diode V of output terminal
3Constitute comparer N
1-25 of input ends meet mu balanced circuit integrated package N
35 points, 6 be connected with power supply.
During this alarm work, energized master switch SA
-2, as tested gas and carrier catalyst element S
2When the surface contacts, produce flameless burning, component temperature is increased, its internal resistance is corresponding to change, and the proportional relation of this variation and gas density is at O, Z two ends output linear voltage, when gas density reaches 1%, because direct current amplifier N
2-3, N
2-1The gain height, so, direct current amplifier N
2-3, conducting is amplified, and is added to comparison trigger N through 14 of output terminals
2-410 points, when surpassing 9 threshold voltages, trigger N
2-48 of output terminals are high level, make switching tube VT conducting, and acousto-optic warning unit gets electric, two frequency generator N
43 of output terminals frequency output is arranged, through capacitor C
1Deliver to power amplifier N
6Amplification is by the loudspeaker B sound that sounds off by the bell.Simultaneously, multivibrator N
7The high brightness LED V of 3 connections of action drives output terminal
5, V
6Alternately send flicker ruddiness.
When tested gas concentration reached 1.5%, the voltage signal that measuring unit output terminal Z, O are 2 was through R
5, R
6Be added on direct current amplifier N
2-12,3 ends, direct current amplifier N
2-1After this signal amplified, be added on comparison amplifier N through output terminal 1
2-2 Input end 5 points when this voltage of signals value surpasses the threshold voltage that compares trigger 6 ends, compare trigger N
2-2Conducting, output terminal 7 have high level output, and are added on two hunting of frequency generator N
46 ends, the output frequency of output terminal 3 is changed, thereby makes loudspeaker B send police whistle sound.
When the sensitivity of catalysis catalysis element reduces comparer N in the zero point drift indicating circuit
1-1To export high level, driven for emitting lights diode V
1, V
2Luminous demonstration, at this moment, regulator potentiometer RP makes luminotron V
1, V
2Extinguish, can recover zero point.
When power supply G voltage is lower than setting, comparer N in the under-voltage indicating circuit
1-2High level output is arranged, and driven for emitting lights diode V
3Luminous indication, prompting is stopped using.
Switch S A
-1, resistance R
2Be connected across resistance R after the serial connection
4On, during self check, with switch S A
-1Connect resistance R
2To incorporate R into
4Bridge balance is destroyed at two ends, causes that measuring unit has signal output, makes the entire circuit action, reaches the self check purpose.
The utility model is owing to adopt 2 relatively trigger circuit, so, but gas density reaches alarm bell acoustic alarm in 1% o'clock in air, caveat person on the scene quit work, reach at 1.5% o'clock, police whistle sound is reported to the police, caveat person on the scene withdraw, be three times in power source voltage owing to adding again, increase the output power of loudspeaker, and adopt high brightness LED in the power amplifier level, so realized the strong acoustooptic warning, its alarm sound at 1 meter greater than 80dB, warning light in the distance tunnel 70 meters high-visible, thereby reached purpose not only portable but also that can use for whole face.
Claims (1)
1, a kind of portable strong acoustooptic gas two point warning device is mainly by measurement, relatively trigger, voltage stabilizing, four unit of sound and light alarm constitute, the measuring unit output terminal is connected with the input end that compares trigger element, relatively the trigger element output terminal is connected with the input end of acousto-optic warning unit, it is characterized in that the comparison trigger element is two tunnel comparison trigger circuit, every road all is to be made of an amplifier and the comparison trigger that is connected with amplifier, and wherein one tunnel amplifier gain is higher than another road amplifier gain, gain bigger one tunnel output terminal is serially connected with a switching tube (VT) that is used for controlling the acousto-optic warning unit conducting, acousto-optic warning unit medium frequency oscillator (N
4) be the double frequency oscillation generator, two kinds of frequency signals that its output terminal (3) is exported respectively are through power amplifier (N
6) after the amplification, by (N
6) corresponding two kinds of different sounds, the power amplifier (N of sending of loudspeaker (B) that connect of output terminal
6) being connected with a voltage tripler, the output terminal of metering circuit (O), (Z) 2 are connected with the zero point drift indicating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210281 CN2184928Y (en) | 1993-04-17 | 1993-04-17 | Portable strong sound and light gas double point alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210281 CN2184928Y (en) | 1993-04-17 | 1993-04-17 | Portable strong sound and light gas double point alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2184928Y true CN2184928Y (en) | 1994-12-07 |
Family
ID=33792224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93210281 Expired - Fee Related CN2184928Y (en) | 1993-04-17 | 1993-04-17 | Portable strong sound and light gas double point alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2184928Y (en) |
-
1993
- 1993-04-17 CN CN 93210281 patent/CN2184928Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |