CN204649618U - Detect the device of particle and gas simultaneously - Google Patents
Detect the device of particle and gas simultaneously Download PDFInfo
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- CN204649618U CN204649618U CN201520348191.0U CN201520348191U CN204649618U CN 204649618 U CN204649618 U CN 204649618U CN 201520348191 U CN201520348191 U CN 201520348191U CN 204649618 U CN204649618 U CN 204649618U
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Abstract
The utility model provides a kind of device simultaneously detecting particle and gas, and described device comprises: the absorption line of the corresponding gas to be measured of wavelength of the measurement light only having a light source to send; First detector is used for the measurement light through environment to be measured to be converted to the first electric signal, and is sent to analysis module; Second detector is arranged on the sidepiece measuring light, for the scattered light of measurement light in environment to be measured is converted to the second electric signal, and is sent to described analysis module; Described first electric signal that analysis module receives according to absorption spectroscopy techniques process, thus obtain the content of gas to be measured; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured.The utility model has the advantages such as structure is simple, low cost.
Description
Technical field
The utility model relates to photoelectric analysis, particularly detects while gas and particle in environment.
Background technology
In some industrial processes, the dust of generation is very easily blasted pyrophoricity accident.Domestic and international achievement in research shows, causes the condition of dust explosion generally to have 3 points: (1) combustible dust suspends in atmosphere with suitable concentration, forms the dust cloud that it has often been said; (2) sufficient oxygenant is had, the oxygen mainly in environment; (3) there is burning things which may cause a fire disaster or judder and the rub heating or electric discharge phenomena that cause.It has been generally acknowledged that, (1) and condition (2) as long as explosive dust satisfies condition, just mean that scene has possessed the condition that may have an accident.And if also include a large amount of inflammable gas in environment, so the explode probability that occurs and the consequence that causes will be more serious.
By country and local safety in production requirement, easily occurring that the industry spot of dust explosion hidden danger all requires to be provided with various types of sensor, comprise dust sensor, oxygen sensor, and methane, carbon monoxide etc. are poisonous, combustible gas sensor.
The dust sensor of rig-site utilization, mainly based on light scattering method, is a kind of detection technique of intrinsic safety type.Oxygen sensor can adopt electrochemical sensor, metal oxide semiconductor sensor and the laser sensor based on TDLAS at present.And detection that is poisonous for methane, carbon monoxide, sulfuretted hydrogen etc., inflammable gas, mainly contain catalytic combustion type sensor at present, metal oxide semiconductor sensor, NDIR infrared absorption type sensor.
For electrochemical sensor, metal oxide semiconductor sensor, catalytic combustion type sensor.They have the advantages such as volume is little, and cost is low, compact conformation mostly.But their principle of work makes to adopt the equipment of these technology to be difficult to accomplish essential safe type in some cases.Also poor to the immunity of environmental influence (as temperature, humidity).Sensitivity is lower, but easily occurs Sensor Poisoning again in higher concentrations.If especially equipment long-term work is in dust atmosphere, gas filtration net very easily blocks, and causes declining to a great extent of detection sensitivity even to be lost efficacy, certainly will need maintaining frequently.
Utility model content
For solving the deficiency in above-mentioned prior art, the utility model provides that a kind of structure is simple, detect the device of particle and gas while low cost.
The purpose of this utility model is achieved through the following technical solutions:
Detect a device for particle and gas, described device comprises simultaneously:
Only there is a light source, the absorption line of the corresponding gas to be measured of wavelength of the measurement light that described light source sends;
First detector, described first detector is used for the measurement light through environment to be measured to be converted to the first electric signal, and is sent to analysis module;
Second detector, described second detector is arranged on the sidepiece measuring light, for the scattered light of measurement light in environment to be measured is converted to the second electric signal, and is sent to described analysis module;
Analysis module, described first electric signal that described analysis module receives according to absorption spectroscopy techniques process, thus obtain the content of gas to be measured; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured.
According to above-mentioned device, alternatively, described device comprises further:
First assembles parts, and described first assembles parts for assembling described measurement light.
According to above-mentioned device, preferably, described second detector is arranged on the sidepiece of the focus of converging light.
According to above-mentioned device, alternatively, described device comprises further:
Second assembles parts, and described second assembles parts assembles the measurement light after parts for assembling through first.
According to above-mentioned device, alternatively, described device comprises further:
Reflecting body, is again assembled parts through described second through the described second measurement light assembling parts by after described reflecting body reflection, is finally received by described first detector.
According to above-mentioned device, preferably, described reflecting body is body of wall or catoptron.
According to above-mentioned device, preferably, described light source is laser instrument.
According to above-mentioned device, preferably, described gas is oxygen or inflammable gas.、
Compared with prior art, the beneficial effect that the utility model has is:
Owing to adopting full light formula to design, device has high precision, stability and intrinsic safety.Be convenient to install and lay, maintenance cost is low, can process several data information in time, and forecast dust being fired to danger is more effective.Only use a light source, significantly reduce complicacy and the cost of device.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustrating the technical solution of the utility model, and and are not intended to be construed as limiting protection domain of the present utility model.In figure:
Fig. 1 is the structural drawing of the device according to the utility model embodiment 1.
Embodiment
Fig. 1 and following description describe Alternate embodiments of the present utility model and how to implement to instruct those skilled in the art and to reproduce the utility model.In order to instruct technical solutions of the utility model, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will in scope of the present utility model.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present utility model in every way.Thus, the utility model is not limited to following Alternate embodiments, and only by claim and their equivalents.
Embodiment 1:
Detect the device of oxygen and particle while Fig. 1 schematically illustrates the present embodiment, as shown in Figure 1, described device comprises:
An only light source 11 adopts semiconductor laser with tunable, the characteristic absorpting spectruming line 760nm of the corresponding oxygen of the measurement light that described laser instrument sends;
First convergent lens 21, described first convergent lens is for assembling described measurement light;
Second convergent lens 22, described second convergent lens and laser instrument are in the both sides of described first convergent lens; Be environment to be measured between described first convergent lens and the second convergent lens, described measurement light is in described environment to be measured by the focus after the first convergent lens convergence;
First photodetector 31, described photodetector, for receiving the measurement light through the second convergent lens, send analysis module after being converted to the first electric signal;
3rd convergent lens 23, described 3rd convergent lens is arranged in the non-measured light light path of described focus sidepiece, for the scattered light of described measurement light in environment to be measured is focused at the second photodetector;
Second photodetector 32, second photodetector is used for scattered light to be converted to the second electric signal, and send analysis module;
Described first electric signal that analysis module receives according to absorption spectroscopy techniques process, thus the content obtaining oxygen; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured.
Detect the method for oxygen and particle while the present embodiment, be also the application of said apparatus, said method comprising the steps of:
(A1) the measurement light that an only light source sends passes environment to be measured, by the oxygen absorption in environment to be measured, and is scattered; The wavelength of described measurement light corresponds to the absorption line 760nm of oxygen;
(A2) the first detector is converted to the first electric signal by what receive through the light after environment to be measured, and is sent to analysis module;
The scattered light of the measurement light sidepiece received is converted to the second electric signal by the second detector, and is sent to analysis module;
(A3) described first electric signal that receives according to tunable diode laser absorption spectrometry technical finesse of analysis module, thus obtain the content of oxygen; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured.
Embodiment 2:
Detect the device of methane and particle while the utility model embodiment, described device comprises:
An only light source adopts semiconductor laser with tunable, the characteristic absorpting spectruming line 1650nm of the corresponding methane of the measurement light that described laser instrument sends;
First convergent lens, described first convergent lens is for assembling described measurement light;
Second convergent lens, described second convergent lens and laser instrument are in the both sides of described first convergent lens; Be environment to be measured between described first convergent lens and the second convergent lens, described measurement light is in described environment to be measured by the focus after the first convergent lens convergence;
Catoptron, as concave mirror, corner reflector etc., the measurement light successively through the first convergent lens and the second convergent lens is reflected by catoptron, again through described second convergent lens, is focused on the first photodetector; Environment to be measured is similarly between second convergent lens and catoptron;
First photodetector, described photodetector, for receiving the measurement light through the second convergent lens, send analysis module after being converted to the first electric signal;
Second photodetector, the second photodetector is arranged in the non-measured light light path of the sidepiece of described focus, for the scattered light of measurement light in environment to be measured is converted to the second electric signal, and send analysis module;
Described first electric signal that analysis module receives according to absorption spectroscopy techniques process, thus the content obtaining methane; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured;
Judge module, judge module is used for whether exceeding threshold value (threshold value arranges according to the condition of exploding) according to the methane received and particle content, as exceeded threshold value, sends alerting signal, and send alarm module;
Alarm module, the alerting signal prompting that described alarm module is used for according to receiving is reported to the police, as sound and light signal.
Detect the method for methane and particle while the present embodiment, be also the application of said apparatus, said method comprising the steps of:
(A1) the measurement light that an only laser instrument sends passes environment to be measured, by the methane adsorption in environment to be measured, and is scattered;
(A2) the first detector is converted to the first electric signal by what receive through the light after environment to be measured, and is sent to analysis module;
The scattered light of the measurement light sidepiece received is converted to the second electric signal by the second detector, and is sent to analysis module;
(A3) described first electric signal that receives according to tunable diode laser absorption spectrometry technical finesse of analysis module, thus obtain the content of methane; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured;
(A4) whether judge module exceedes threshold value (threshold value arranges according to the condition of exploding) according to the methane received and particle content, as exceeded threshold value, sends alerting signal, and send alarm module;
(A5) alarm module is reported to the police, as sound and light signal according to the alerting signal prompting received.
Embodiment 3:
The device of methane and particle is detected while the utility model embodiment, as different from Example 2:
This application of installation, in environment of open circuit, does not re-use corner reflector, and the measurement light successively through the first convergent lens and the second convergent lens can again through the second convergent lens through body of wall reflection.
Above-described embodiment is only exemplarily give the situation detecting oxygen, methane, certainly can also apply in other cases, gas as toxic in carbon monoxide, sulfuretted hydrogen etc. and inflammable gas.Essence of the present utility model is: the measurement light that an only light source (institute's emission wavelength corresponds to the absorption line of gas to be measured) sends is absorbed by the gas-selectively in environment to be measured, by particle scattering, by the content detecting the measurement light after decaying, scattered light can record gas and particle in environment simultaneously.
Claims (8)
1. detect a device for particle and gas simultaneously, it is characterized in that: described device comprises:
Only there is a light source, the absorption line of the corresponding gas to be measured of wavelength of the measurement light that described light source sends;
First detector, described first detector is used for the measurement light through environment to be measured to be converted to the first electric signal, and is sent to analysis module;
Second detector, described second detector is arranged on the sidepiece measuring light, for the scattered light of measurement light in environment to be measured is converted to the second electric signal, and is sent to described analysis module;
Analysis module, described first electric signal that described analysis module receives according to absorption spectroscopy techniques process, thus obtain the content of gas to be measured; And according to scattering technology process the second electric signal, thus know the content of particle in described environment to be measured.
2. device according to claim 1, is characterized in that: described device comprises further:
First assembles parts, and described first assembles parts for assembling described measurement light.
3. device according to claim 2, is characterized in that: described second detector is arranged on the sidepiece of the focus of converging light.
4. device according to claim 2, is characterized in that: described device comprises further:
Second assembles parts, and described second assembles parts assembles the measurement light after parts for assembling through first.
5. device according to claim 4, is characterized in that: described device comprises further:
Reflecting body, is again assembled parts through described second through the described second measurement light assembling parts by after described reflecting body reflection, is finally received by described first detector.
6. device according to claim 5, is characterized in that: described reflecting body is body of wall or catoptron.
7. device according to claim 1, is characterized in that: described light source is laser instrument.
8. device according to claim 1, is characterized in that: described gas is oxygen or inflammable gas.
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| CN201520348191.0U CN204649618U (en) | 2015-05-26 | 2015-05-26 | Detect the device of particle and gas simultaneously |
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| CN201520348191.0U CN204649618U (en) | 2015-05-26 | 2015-05-26 | Detect the device of particle and gas simultaneously |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501199A (en) * | 2016-11-08 | 2017-03-15 | 上海禾赛光电科技有限公司 | There is gas-detecting device and the method for automatically cleaning window |
| CN106840985A (en) * | 2016-12-28 | 2017-06-13 | 武汉三众和光电科技有限公司 | A kind of fuel gas and dust is while measuring method and device |
| CN107748121A (en) * | 2017-08-30 | 2018-03-02 | 芜湖凯尔电气科技有限公司 | Air monitor |
| CN109813639A (en) * | 2019-01-07 | 2019-05-28 | 东南大学 | A kind of particulate matter based on infrared light modulation techniques and gas concentration synchronous measuring apparatus and its measurement method |
| CN112114552A (en) * | 2019-06-20 | 2020-12-22 | 北京理工大学 | Multipoint parameter gas-solid fuel monitoring, early warning and controlling system |
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2015
- 2015-05-26 CN CN201520348191.0U patent/CN204649618U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501199A (en) * | 2016-11-08 | 2017-03-15 | 上海禾赛光电科技有限公司 | There is gas-detecting device and the method for automatically cleaning window |
| CN106840985A (en) * | 2016-12-28 | 2017-06-13 | 武汉三众和光电科技有限公司 | A kind of fuel gas and dust is while measuring method and device |
| CN107748121A (en) * | 2017-08-30 | 2018-03-02 | 芜湖凯尔电气科技有限公司 | Air monitor |
| CN109813639A (en) * | 2019-01-07 | 2019-05-28 | 东南大学 | A kind of particulate matter based on infrared light modulation techniques and gas concentration synchronous measuring apparatus and its measurement method |
| CN109813639B (en) * | 2019-01-07 | 2021-09-28 | 东南大学 | Infrared light modulation technology-based synchronous measurement device and measurement method for concentration of particulate matters and gas |
| CN112114552A (en) * | 2019-06-20 | 2020-12-22 | 北京理工大学 | Multipoint parameter gas-solid fuel monitoring, early warning and controlling system |
| CN112114552B (en) * | 2019-06-20 | 2022-06-17 | 北京理工大学 | Multipoint parameter gas-solid fuel monitoring, early warning and controlling system |
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