CN85204675U - Pocket gas detector for mining - Google Patents
Pocket gas detector for mining Download PDFInfo
- Publication number
- CN85204675U CN85204675U CN 85204675 CN85204675U CN85204675U CN 85204675 U CN85204675 U CN 85204675U CN 85204675 CN85204675 CN 85204675 CN 85204675 U CN85204675 U CN 85204675U CN 85204675 U CN85204675 U CN 85204675U
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- China
- Prior art keywords
- alarm
- gas monitoring
- gas
- monitoring equipment
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a gas monitoring and alarm instrument for mines, and belongs to the personal portable monitoring and alarm instrument for gas density. The design adopts a special multifunction large scale integrated circuit. The utility model has two functions of the automatic sound alarm and the light display alarm, and is a novel gas monitoring and alarm instrument that the liquid crystal displays the gas density and the time.
Description
Belong in mine or the tunnel or the safety device of himself.
How to be undertaken in the gas monitoring work of China's coal-mine at present by the professional.The light interference type gas tester of common use weighs 1 kilogram.The alarm point error reaches ± and 10%.And begun to adopt digital gas detector abroad.As: daily output GP-82 type, volume is 78 * 26 * 142mm
3, weight 310 grams.Buzzer is reported to the police, and the methane warning thresholding is 1.5%, precision ± 10% full scale, Ni-Cd storage battery power supply, but continuous operation 6 hours.
Structural principle of the present utility model is shown in Fig. 1 square: airborne gas becomes electric signal by dosimetric sensors (1), handles via electronic circuit (2), and one road body moves liquid crystal display 3N
26 show gas density, and another road is judged through Digital Logic, drives acoustooptic alarm system (3).(4) be electric power system, it includes 9 volts of laminated cells and special DC1632Ag-Zn battery.
Main feature of the present utility model is to have designed a kind of electronic working circuit.Adopt Digital Logic to remove to control alarm point.It realizes 1.00% and 1.50% principle of reporting to the police as shown in Figure 3: the mode that the DG7126A/D converter is a voltage signal that sensor is carried into by inner three-phase double integrator converts corresponding pulse signal to, and then the decade counter, Lock storage by DG7126 inside, decoder, LCD driver etc., this pulse signal is sent into LCDs carry out numeral demonstration.For realizing the warning of 1.00% and 1.50% thresholding, the electric potential signal that DG7126 is sent into LCD takes out and is passed to (this is actually the appropriate combination of one group of NAND gate) in the alarming logic control circuit again.Make it show at 1.00% o'clock, each electric potential signal that takes out is by high-voltage signal that the amplitude approximate voltage is 8.9V of logic control circuit output, and it passes through switch
K
1(accompanying drawing 2) is added on the buzzer, sends alert sound.If signal value less than 1.00% control circuit output be the electronegative potential of a 0.3V, therefore can not report to the police.For making the operating personnel that the vigilance sense be arranged, do not manage automatic conversion but manual change-over switch.After 1.00% warning, changeover switch card K
2(accompanying drawing 2) makes it place 1.50% warning thresholding.Originally reporting to the police stops, the electronegative potential of a 0.3V of control circuit output.If signal is less than 1.5%, voltage potential has only 0.3V, so can not report to the police.If gas density has reached 1.50% in the environment, corresponding liquid crystal display demonstrates numeral.At this moment each electric potential signal that takes out from the 3rd, second-order digit display circuit is sent into the alarming logic control circuit; Make its of output be about the 8.9V high voltage signal and be added on the buzzer, make buzzer send alert acoustic signal for the second time, this has just realized the in full accord of show value and alarming value.It is in order to satisfy the actual needs of existing high gas type of China and present low gas type that this two retainings warning is set.
Another characteristics of the present utility model are to have designed the blast resistant construction that a kind of ABS plastic is done.Dosimetric sensors is placed in it.Its structure as shown in Figure 4, (1) flame proof cover body, (2) powder metallurgy garden sheet, (3) antidrip lid.Flame proof, antidrip, dustproof function have promptly been realized for these three.
According to the utility model, this instrument volume 76 * 26 * 111mm
3, weight is 230 grams only.Accompanying drawing 5 is its outline drawings, and (1) is the LED light emitting diode, and (2) are 3N
26 liquid crystal displays, (3) are FT20 piezoelectric ceramics buzzer, and (4) are electronic timer, and (5) are antidrip anti-explosion cover, and (6) are the shell protecgulum.
Claims (3)
1, a kind of liquid crystal digital shows and is furnished with electronic timer, the pocket gas monitoring equipment that sensor, buzzer are formed.It is characterized in that electronic circuit has adopted the A/D conversion, Digital Logic control is reported to the police.
2, pocket according to claim 1 gas monitoring equipment is characterized in that this electronic circuit all can be integrated in the semiconductor stamen sheet.
3, pocket according to claim 1 gas monitoring equipment is characterized in that the flame proof body structure has a drip shield with holes, circular powder metallurgy picture and flame proof cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204675 CN85204675U (en) | 1985-11-08 | 1985-11-08 | Pocket gas detector for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204675 CN85204675U (en) | 1985-11-08 | 1985-11-08 | Pocket gas detector for mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204675U true CN85204675U (en) | 1986-03-19 |
Family
ID=4799928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204675 Ceased CN85204675U (en) | 1985-11-08 | 1985-11-08 | Pocket gas detector for mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968460A (en) * | 2010-09-21 | 2011-02-09 | 淮南润成科技有限公司 | Low-concentration methane sensor |
-
1985
- 1985-11-08 CN CN 85204675 patent/CN85204675U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968460A (en) * | 2010-09-21 | 2011-02-09 | 淮南润成科技有限公司 | Low-concentration methane sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: China Shipping Corporation No. 718 Research Institute Co-applicant after: Xu Dazhang Applicant before: Xu Dazhang |
|
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: XU DAZHANG TO: NO. 718 INSTITUTE OF CHINA SHIPBUILDING CORPORATION; CO-APPLICANT TO: XU DAZHANG; APPLICANT; FROM: XU DAZHANG TO: NO. 718 INSTITUTE OF CHINA SHIPBUILDING CORPORATION; CO-APPLICANT TO: XU DAZHANG |