CN1388305A - Personal mine gas alarm - Google Patents
Personal mine gas alarm Download PDFInfo
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- CN1388305A CN1388305A CN 01112978 CN01112978A CN1388305A CN 1388305 A CN1388305 A CN 1388305A CN 01112978 CN01112978 CN 01112978 CN 01112978 A CN01112978 A CN 01112978A CN 1388305 A CN1388305 A CN 1388305A
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- mine gas
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Abstract
The personal mine gas alarm consists of four parts including power source, gas detector circuit, delaying triggered switch circuit and voice warning circuit. In case of gas content exceeding safety standard, the gas detector circuit sends out signal and the signal is treated in the delaying triggered switch circuit and fed to the voice warning circuit for the loudspeaker to sound warning. It has simple structure, is powered by the mine lamp accumulator and is installed inside the miner helmet.
Description
The present invention relates to a kind of personal mine gas alarm, use when being applicable to mine workman underground work.
Middle and small scale coal mine is not owing to possess advanced person, perfect gas detection means, thereby the fire damp explosion accident happens occasionally.How to develop the instrument of the detection gas that a kind of cost is low, function is preceding by force, be convenient for carrying, be the problem of each middle and small scale coal mine research always.
The main purpose of personal mine gas alarm of the present invention is to provide a kind of miner portable gas alarm, when its in underground work and gas bearing capacity when transfiniting can send " gas exceeding limit, danger repeatedly! Withdraw soon! " alarm language, remind owner in time to withdraw the scene, effectively avoid the generation of serious accident.
For achieving the above object, personal mine gas alarm of the present invention comprises power supply, methane gas testing circuit, postpones trigger switch circuit and phonic warning circuit four parts, when methane gas content surpasses safety standard, the methane gas testing circuit can be sent signal, deliver to the phonic warning circuit via postponing the trigger switch circuit, and by loudspeaker wherein send " gas exceeding limit, danger! Withdraw soon! " alarm language.It utilizes miner light storage battery to make power supply, can be directly installed on by (or in head lamp) in the cap of ore deposit, has the cost performance height, does not influence the ore deposit cap lamp and normally use, the unusual advantage such as quick of monitoring gas density.
Below in conjunction with accompanying drawing personal mine gas alarm of the present invention is described in further detail.
Fig. 1 is the circuit diagram of personal mine gas alarm;
Fig. 2 is the block diagram of personal mine gas alarm.
As shown in Figure 1, the dotted line left side is the original lighting circuit of ore deposit cap lamp, and the right is by being increased the phonetic alarm circuit, and gas sensitive device QM-N5, R1 and RP form the methane gas testing circuit.VT1, VD, R2 and C1 form and postpone the trigger switch circuit.Voice integrated chip A, R4, C2, VT2 and B have formed the phonic warning circuit.
At ordinary times, do not have gas or gas density when very low when the down-hole, conductance is very little between a of QM-N5, b measurement electrode, output voltage＞the 2.7V of RP sliding contact, not conducting of VD, VT1 is in cut-off state, the TG3 pin of A does not have the flat triggering signal of senior middle school, and the A internal circuit is not worked, and B is sounding not.In case when methane gas content surpassed the safety standard that limits, conductance increased rapidly between a of QM-N5, b electrode, the output voltage＜2.7V of RP sliding contact, the VD conducting, VT1 obtains to compile and flows also conducting.A works because of the TG3 pin obtains high trigger signal, and its OUT pin is exported interior storage " gas exceeding limit, danger repeatedly! Withdraw soon! " voice telecommunication number, after the VT2 power amplification, drive loudspeaker B the alarm language takes place.
In the circuit, R2, C1 constitute simple and easy delay circuit, and it can effectively eliminate the false triggering that the intrinsic initial characteristic of gas sensitive tube causes circuit.R4, C2 are respectively external oscillation resistance and the electric capacity of A, and its numerical values recited influences voice rate and tone.
Gas sensitive device adopts homemade QM-N5 type, and A selects novel HFC5221A type speech IC chip for use, storage " gas exceeding limit, danger in it! Withdraw soon! " alarm language, trigger end triggers output with high level.VT1 requires β＞150 with 9015 or 3CG21 type silicon PNP triode; VT2 is with 8050 (I
CM=1.5A, P
CM=1W) pliotron requires β＞100 among the type silicon NPN.VD IN4148 type transwitch diode.RB adopts the organic solid trimmer potentiometer of WS-2 type self-locking.R1 RJ-1/4W type metal film resistor, R2～R4 all uses the RTX-1/8W carbon film resistor.B adopts Ф 27 * 9mm or the ultra-thin miniature coil-moving speaker of Ф 29 * 9mm.
The block diagram of personal mine gas alarm as shown in Figure 2 is made of power supply 1, methane gas testing circuit 2, delay triggering exploitation circuit 3 and phonic warning circuit 4 four parts.Wherein power supply 1 part adopts miner light storage battery to make power supply, methane gas testing circuit 2 is made up of gas sensitive device QM-N5, R1 and RP, postponing trigger switch circuit 3 is made up of VT1, VD, R2 and C1, the phonic warning circuit is made up of voice integrated chip A, R4, C2, VT2 and B, when methane gas content was above standard, the methane gas testing circuit was crossed and can be sent signal, delivered to phonic warning circuit 4 via postponing trigger switch circuit 3, and by loudspeaker B wherein send " gas exceeding limit, danger! Withdraw soon! " alarm language.
Circuit alarm sensitivity can be determined by the RP resistance.Debugging work is to use with the method for standard gas checkout equipment contrast to carry out.Concrete operations are as follows: connect power supply and made the gas-sensing probe preheating 10 minutes; Get concentration subsequently and be 1% Device in Gas sample and deposit in the polybag, escape pipe is aimed at gas-sensing probe, the bag of gently calming the anger on one side is outer to be surveyed, and the slow on one side RP resistance of finely tuning makes B just till the sounding.At this moment stop to carry the gas sample, then B should stop sounding very soon, supplies gas with same gas sample after 5-10 minute again, see B sounding whether reliably, fine tuning repeatedly is till sensitivity, reliably working, debugging finishes, and tightens the fastening nut on the RP footstalk, prevents that the RP resistance from use changing.
Claims (2)
1. personal mine gas alarm, constitute by power supply (1), methane gas testing circuit (2), delay trigger switch circuit (3) and phonic warning circuit (4) four parts, it is characterized in that: it utilizes miner light storage battery to make power supply (1), directly be installed in the cap of ore deposit or head lamp in, when the output voltage of swept resistance (RP) sliding contact during less than 2.7V, alarm can send alarm signal.。
2. personal mine gas alarm as claimed in claim 1 is characterized in that: the sensitivity of alarm can be determined by the resistance that changes swept resistance (RP).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112978 CN1388305A (en) | 2001-05-24 | 2001-05-24 | Personal mine gas alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112978 CN1388305A (en) | 2001-05-24 | 2001-05-24 | Personal mine gas alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1388305A true CN1388305A (en) | 2003-01-01 |
Family
ID=4659723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01112978 Pending CN1388305A (en) | 2001-05-24 | 2001-05-24 | Personal mine gas alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1388305A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013072529A1 (en) * | 2011-11-15 | 2013-05-23 | Julio Bouzas Fuentetaja | Gas detector device |
| CN103184886A (en) * | 2011-12-30 | 2013-07-03 | 国家纳米技术与工程研究院 | Measuring component of MEMS (Micro-electromechanical Systems) technology-based gas alarm and preparation method of measuring component |
| CN103184886B (en) * | 2011-12-30 | 2016-12-14 | 国家纳米技术与工程研究院 | A kind of measurement parts of gas alarm based on MEMS technology and preparation method thereof |
-
2001
- 2001-05-24 CN CN 01112978 patent/CN1388305A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013072529A1 (en) * | 2011-11-15 | 2013-05-23 | Julio Bouzas Fuentetaja | Gas detector device |
| ES2419505A1 (en) * | 2011-11-15 | 2013-08-20 | Julio BOUZAS FUENTETAJA | Gas detector device |
| CN103184886A (en) * | 2011-12-30 | 2013-07-03 | 国家纳米技术与工程研究院 | Measuring component of MEMS (Micro-electromechanical Systems) technology-based gas alarm and preparation method of measuring component |
| CN103184886B (en) * | 2011-12-30 | 2016-12-14 | 国家纳米技术与工程研究院 | A kind of measurement parts of gas alarm based on MEMS technology and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |