CN204177730U - Echo reflection formula laser methane telegauge - Google Patents
Echo reflection formula laser methane telegauge Download PDFInfo
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- CN204177730U CN204177730U CN201420513236.0U CN201420513236U CN204177730U CN 204177730 U CN204177730 U CN 204177730U CN 201420513236 U CN201420513236 U CN 201420513236U CN 204177730 U CN204177730 U CN 204177730U
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Abstract
The utility model provides a kind of echo reflection formula laser methane telegauge, comprise power supply unit, LD laser instrument, laser control circuit, be arranged at convex lens, detector and signal deteching circuit before LD laser instrument, described signal deteching circuit comprises the PD opto-electronic receiver detection module, filter and amplification module, the data conversion module that connect successively.The laser that this echo reflection formula laser methane telegauge is sent by laser instrument irradiates target area, the mode of the reflected laser signals of detection containing methane concentration information collected by detector, make this remote methane monitor can detect the methane concentration information in any region, achieve the omnibearing methane concentration of underground coal mine to detect, the aspect of detector detection is analyzed again by signal deteching circuit, draw the methane concentration information of target area, thus solve existing CH_4 detection instrument and can not carry out comprehensive methane concentration detection to down-hole, mining area, cause the problem of certain potential safety hazard.
Description
Technical field
The utility model relates to field of gas detection, in particular to a kind of echo reflection formula laser methane telegauge.
Background technology
Under mine, methane concentration is excessive easily to set off an explosion, and oxygen concentration in air also can be caused to reduce, affect the health of underground operators, life security, therefore detects the methane concentration in the underground air of ore deposit and seems particularly important.What methane concentration detecting instrument major part that China is mining adopted is fixed detecting instrument, but fixed detecting instrument can only carry out fixed point monitoring, the region that the methane gas such as goaf, face upper corner angle is easily assembled cannot be installed to, comprehensive methane concentration detection can not be carried out to each region, down-hole, mining area, cause certain potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of echo reflection formula laser methane telegauge, to solve the problem can not carrying out comprehensive methane concentration detection to each region, down-hole, mining area.
The utility model is achieved in that
A kind of echo reflection formula laser methane telegauge, comprise power supply unit, LD laser instrument, laser control circuit, be arranged at the convex lens before LD laser instrument, signal sensor, signal deteching circuit and control module, described laser control circuit comprises current control module and temperature control modules, and described current control module and described temperature control modules are connected with described LD laser instrument respectively, described signal deteching circuit comprises the PD opto-electronic receiver detection module connected successively, filter and amplification module, A/D modular converter, described signal sensor is connected with described PD photelectric receiver, described A/D modular converter is connected with described control module, described control module is also connected with data display unit, warning horn and wireless signal transmission unit.
Further, described wireless signal transmission unit also with Mine Monitoring equipment connection.Wireless signal transmission unit set by this remote methane monitor, by multiple sensor node in wireless network and the Mine Monitoring equipment connection of down-hole, therefore after this remote methane monitor detects methane concentration information, by wireless network, methane concentration information can be sent to Mine Monitoring equipment, and store, for late time data analysis.Simultaneously, when this remote methane monitor detects that certain region methane concentration value exceeds standard, hydropac signal is sent to Mine Monitoring equipment at once by wireless signal transmission unit, avoid after down-hole methane concentration value exceeds standard, Mine Monitoring equipment to exceed standard information because obtaining methane in time, and do not send hydropac in time, and bring danger to underground work personnel.
Further, described echo reflection formula laser methane telegauge also comprises concentration detecting unit, and described concentration detecting unit comprises probe and detection module, and described detection module is connected with described control module.When the methane in air is more, oxygen content in air can be made obviously to reduce, oxygen content is lower causes human body to have a headache, dizzy, weak, absent minded, or even to suffocate.Detect the oxygen concentration in air, can reflect whether the methane content in air exceeds standard to a certain extent, also avoid underground operators to impair one's health because oxygen content is lower simultaneously.
Further, described echo reflection formula laser methane telegauge also comprises data-carrier store, and described data-carrier store is connected with described control module.Analyze data-carrier store and store the methane concentration data measured, the change conditions of methane concentration value can be summed up, thus can to may occur that methane concentration exceeds standard region make and giving warning in advance.
Further, described power supply unit comprises chargeable lithium cell.Chargeable lithium cell can reuse, and can save more resource.
The technique effect that the utility model realizes:
A kind of echo reflection formula laser methane telegauge that the utility model provides, the laser sent by laser instrument irradiates target area, the mode of the reflected laser signals of detection containing methane concentration information collected by detector, make this remote methane monitor can detect the methane concentration information in any region, achieve the omnibearing methane concentration of underground coal mine to detect, analyzed again the aspect of detector detection by signal deteching circuit, draw the methane concentration information of target area.A kind of echo reflection formula laser methane telegauge structure that the utility model provides is simple, be convenient to hand-held carrying, methane concentration detection can be carried out to any region, down-hole, thus solve existing fixed CH_4 detection instrument can not carry out comprehensive methane concentration detection problem to down-hole, mining area, eliminate potential safety hazard, ensure the life security of underground operators.
Accompanying drawing explanation
The structured flowchart of the echo reflection formula laser methane telegauge that Fig. 1 provides for the utility model.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
Refer to Fig. 1, a kind of echo reflection formula laser methane telegauge that the utility model provides, comprise power supply unit, LD laser instrument, laser control circuit, be arranged at convex lens, detector and signal deteching circuit before LD laser instrument.
In the Near-infrared Spectral Absorption spectral line of methane, 1653.72nm is wavelength the strongest in its absorption peak, in order to make the final methane concentration detected more accurate, need the wavelength of laser control circuit control LD laser instrument Emission Lasers, and make laser instrument be in comparatively stable duty, the laser sending required wavelength that namely can be stable.In the present embodiment, laser control circuit comprises current control module and temperature control modules.Wherein, the index of modulation of current control module is about 0.01nm/mA, and the index of modulation of temperature control modules is about 0.1nm/ DEG C, and namely temperature modulation 1 DEG C is equivalent to current-modulation 10mA.Therefore, temperature control modules can regulate the optical maser wavelength of laser instrument in the larger context, and in smaller scope, can carry out fine adjustment to the optical maser wavelength of laser instrument by current control module.In concrete adjustment process, can first optical maser wavelength be controlled at 1653.7nm, ensure that optical maser wavelength is near methane adsorption peak-to-peak value like this, then, by current control module, optical maser wavelength is modulated more accurately, now laser wavelength modulation scope is ± 0.2nm, accordingly, the variation range of optical maser wavelength is 1653.5nm-1653.9nm, peak-to-peak value 1653.72nm place will inevitably be received through inhaling methane at current scanning scope inner laser wavelength, ensure that the optimal absorption effect of laser wavelength.So cooperatively interacted by current control module and temperature control modules, the wavelength regulation of the laser that laser instrument can be sent, to more accurate value, is beneficial to finally obtain more accurate methane concentration information.
When laser passes the target area containing methane, the optical molecule of laser can be absorbed by methane gas, and the higher absorbed molecule of methane concentration is more, and the laser therefore reflected carries methane concentration information.In order to enable to reflect and laser with methane concentration information is arranged at received by the detector of this remote methane monitor, the front end of LD laser instrument is provided with convex lens, when the laser reflected is after twice refraction of convex lens, device can be detected and successfully receive.
After laser signal collected by detector, this laser signal is delivered to signal deteching circuit, goes out the methane concentration value of target area with the information analysis utilizing this laser signal to carry.In order to analyze methane concentration value accurately, signal deteching circuit comprises the PD opto-electronic receiver detection module, filter and amplification module and the data conversion module that connect successively.The signal that detector passes over is first through PD opto-electronic receiver detection module, convert analog electrical signal to, PD opto-electronic receiver detection module is delivered to filter and amplification module this analog electrical signal again, filter out the noise interferences in signal, and the analog electrical signal after filtering is carried out signal amplification, then the analog electrical signal after amplification is delivered to data conversion module, converts the digital electric signal representing methane concentration information to, and finally digital electric signal is delivered to control module.
And data display unit, warning horn and the wireless signal transmission unit in addition that are connected with control module.Wherein, wireless signal transmission unit is set, is to the methane concentration information detected is sent to Mine Monitoring equipment by wireless network, and stores, for late time data analysis.When this remote methane monitor detects that certain region methane concentration value exceeds standard, hydropac signal is sent to Mine Monitoring equipment at once by wireless signal transmission unit, avoid after down-hole methane concentration value exceeds standard, Mine Monitoring equipment to exceed standard information because obtaining methane in time, and do not send hydropac in time, and bring danger to underground work personnel.
In order to detect methane concentration value further, in this remote methane monitor, be also provided with concentration detecting unit, concentration detecting unit comprises the detection module that probe for detecting oxygen and oxygen concentration are analyzed, and detection module is connected with control module.When the methane in air is more, oxygen content in air can be made obviously to reduce, therefore detect the oxygen concentration in air, whether the methane content that can reflect in air to a certain extent has the possibility of increase.
User for the ease of remote methane monitor checks measured data, and this remote methane monitor is also provided with data storage module.
It should be noted that, this echo reflection formula laser methane telegauge in use, can consume a certain amount of electric energy, and in order to play the effect of energy-saving and environmental protection, the power supply unit of this remote methane monitor is provided with chargeable lithium cell.
It should be noted that, in the present embodiment, the methane mentioned exceeds standard, and refer to the down-hole methane concentration safety value exceeding country and formulate, namely in coal mine, methane concentration is no more than 1%.
It should be noted that, in the present embodiment, the Mine Monitoring equipment mentioned be the existing watch-dog in colliery, and this watch-dog has network access facility.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. an echo reflection formula laser methane telegauge, it is characterized in that, comprise power supply unit, LD laser instrument, laser control circuit, be arranged at the convex lens before LD laser instrument, signal sensor, signal deteching circuit and control module, described laser control circuit comprises current control module and temperature control modules, and described current control module and described temperature control modules are connected with described LD laser instrument respectively, described signal deteching circuit comprises the PD opto-electronic receiver detection module connected successively, filter and amplification module, A/D modular converter, described signal sensor is connected with described PD photelectric receiver, described A/D modular converter is connected with described control module, described control module is also connected to data display unit, warning horn and wireless signal transmission unit.
2. echo reflection formula laser methane telegauge according to claim 1, is characterized in that, described wireless signal transmission unit also with Mine Monitoring equipment connection.
3. echo reflection formula laser methane telegauge according to claim 1, it is characterized in that, described echo reflection formula laser methane telegauge also comprises concentration detecting unit, and described concentration detecting unit comprises probe and detection module, and described detection module is connected with described control module.
4. echo reflection formula laser methane telegauge according to claim 1, is characterized in that, described echo reflection formula laser methane telegauge also comprises data-carrier store, and described data-carrier store is connected with described control module.
5. echo reflection formula laser methane telegauge according to claim 1, it is characterized in that, described power supply unit comprises chargeable lithium cell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513236.0U CN204177730U (en) | 2014-09-05 | 2014-09-05 | Echo reflection formula laser methane telegauge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420513236.0U CN204177730U (en) | 2014-09-05 | 2014-09-05 | Echo reflection formula laser methane telegauge |
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| CN204177730U true CN204177730U (en) | 2015-02-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841039A (en) * | 2017-03-24 | 2017-06-13 | 北京华夏艾科激光科技有限公司 | A kind of mine laser methane remote sensing instrument |
| CN107884363A (en) * | 2017-10-17 | 2018-04-06 | 中国矿业大学(北京) | A kind of laser mine gas method of telemetering based on machine vision technique |
| CN108037094A (en) * | 2017-11-30 | 2018-05-15 | 新疆美特智能安全工程股份有限公司 | A kind of fuel gas laser telemetry system and method |
| CN109916852A (en) * | 2019-01-31 | 2019-06-21 | 上海禾赛光电科技有限公司 | A kind of laser gas remote measurement instrument signal acquisition method and system |
| WO2020156280A1 (en) * | 2019-01-31 | 2020-08-06 | 上海禾赛光电科技有限公司 | Method for detecting laser gas telemeter, signal acquisition method and system |
| CN114216878A (en) * | 2021-12-02 | 2022-03-22 | 山西晋煤集团技术研究院有限责任公司 | Methane telemeter based on tunable laser |
| CN115468122A (en) * | 2022-09-15 | 2022-12-13 | 华润燃气投资（中国）有限公司 | Natural gas station operation intelligent monitoring system and method based on 5G |
-
2014
- 2014-09-05 CN CN201420513236.0U patent/CN204177730U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841039A (en) * | 2017-03-24 | 2017-06-13 | 北京华夏艾科激光科技有限公司 | A kind of mine laser methane remote sensing instrument |
| CN107884363A (en) * | 2017-10-17 | 2018-04-06 | 中国矿业大学(北京) | A kind of laser mine gas method of telemetering based on machine vision technique |
| CN107884363B (en) * | 2017-10-17 | 2023-10-24 | 中国矿业大学(北京) | Laser mine gas telemetry method based on machine vision technology |
| CN108037094A (en) * | 2017-11-30 | 2018-05-15 | 新疆美特智能安全工程股份有限公司 | A kind of fuel gas laser telemetry system and method |
| CN109916852A (en) * | 2019-01-31 | 2019-06-21 | 上海禾赛光电科技有限公司 | A kind of laser gas remote measurement instrument signal acquisition method and system |
| WO2020156280A1 (en) * | 2019-01-31 | 2020-08-06 | 上海禾赛光电科技有限公司 | Method for detecting laser gas telemeter, signal acquisition method and system |
| CN114216878A (en) * | 2021-12-02 | 2022-03-22 | 山西晋煤集团技术研究院有限责任公司 | Methane telemeter based on tunable laser |
| CN115468122A (en) * | 2022-09-15 | 2022-12-13 | 华润燃气投资（中国）有限公司 | Natural gas station operation intelligent monitoring system and method based on 5G |
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