CN106908364A - Mining intrinsic safety type dust sensing device based on light scattering method - Google Patents
Mining intrinsic safety type dust sensing device based on light scattering method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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Abstract
This application discloses a kind of mining intrinsic safety type dust sensing device based on light scattering method, it is characterized in that including arranging LASER Light Source (9) along same axis, test chamber (11), fan assembly, wherein, the light extraction end of the LASER Light Source (9) is connected with one end of test chamber (11), the laser that the LASER Light Source (9) is launched is along the axis propagation, wherein, the mining intrinsic safety type dust sensing device also includes photoelectric conversion component (14), it is placed in test chamber (11) top perpendicularly to the axis with described, just to the through hole on the test chamber (11) top, wherein, the fan assembly is used to for air to be measured to introduce the test chamber (11).
Description
Technical field
The application belongs to electrical control and technical field of mine safety, is related to a kind of mining intrinsic based on light scattering method to pacify
Holotype dust sensor, more particularly, to the dust concentration detection means with dust sensor.
Background technology
The harmfulness of dust (dust produced particularly in production process) is larger, caused by long-term suction high concentrate dust
Pneumoconiosis be most common occupational disease；The toxic elements such as the lead contained in dust, cadmium, arsenic, manganese, are preferentially absorbed into respiratory tract dissolving
Enter blood circulation and cause poisoning；The lightweight dust such as Mao Chen, cotton dirt, when respiratory tract is inhaled into, are easily attached to nasal cavity, tracheae, branch
The mucous membrane of tracheae, long-term local irritant effect and continuation infection cause chronic inflammation.Additionally, dust can also cause eye illness, skin
Disease etc., dust also has carcinogenesis, particularly lung cancer.For the industry such as colliery for being also easy to produce dust in process of production,
, also there is dust in air concentration and tend to saturation in cement, flour mill, medication chemistry industry etc., meeting electrostatic or naked light
In the case of the potential safety hazard exploded.Therefore, either consider from production safety angle, or it is healthy from protection worker
Angle considers, is required for carrying out dust detection to workplace.
Chinese invention patent ZL200820122691.2 discloses a kind of laser dust detector, and it includes thering is an air inlet
Mouth and the darkroom of a gas outlet, are provided with two dividing plates every the gas passage for setting, the darkroom between the air inlet and gas outlet
One end is provided with the light source produced by a laser generator, and the other end in the darkroom is corresponding with the light source to be disposed with one
Optical lens group and a photelectric receiver, offer light hole corresponding with the light source on two dividing plate；The darkroom
Gas outlet sequentially connects an aspiration pump, a humidity sensor and an exhaust outlet；The photelectric receiver is put before sequentially connecting one
Big device, an integrating circuit, an analog-digital converter and a single-chip microcomputer；But what the photelectric receiver of the laser dust detector was received
It is the scattering light light intensity signal of dust (particulate matter), and the light hole size on dividing plate is extremely important, light hole is excessive, works as gas
Refraction or the light of reflection that body particle is produced after being irradiated with a laser, it is not easy to received by photelectric receiver；Light hole is too small, unfavorable
Scattering light light intensity signal is completely received in photelectric receiver, therefore, the light hole on dividing plate is excessive or too small, all easy shadow
Ring the accuracy of testing result.And dust inlet channel is vertically arranged, easily cause that dust declines too fast, air-flow is unstable, influence
Certainty of measurement.
The content of the invention
The purpose of the present invention is directed to the defect of above technology, there is provided a kind of mining intrinsic safety type based on light scattering method
Dust measurement equipment.
According to embodiments herein, there is provided the mining intrinsic safety type dust sensing device based on light scattering method, its
It is characterised by including arranging LASER Light Source (9), test chamber (11), fan assembly along same axis, wherein, the LASER Light Source
(9) light extraction end is connected with one end of test chamber (11), and the laser that the LASER Light Source (9) is launched is passed along the axis
Broadcast, wherein, the mining intrinsic safety type dust sensing device also includes photoelectric conversion component (14), and it is vertical with the axis
Be placed in test chamber (11) top, just to the through hole on the test chamber (11) top, wherein, the fan assembly is used for
Air to be measured is introduced into the test chamber (11).
According to embodiments herein, direct-reading dust concentration detection means includes blower fan apparatus, sampling head, LASER Light Source
Device, photoelectric-cell unit, carry the signal processing apparatus and housing of LED display, wherein, sampling head is fixed with housing, and
And be stuck in outside housing, it is connected with signal receiving device gas circuit.At blower fan apparatus, laser pipe device, photoelectric-cell unit and signal
Reason device is located in the housing, photoelectric-cell unit and laser pipe device phase floating fit, laser light-source device include laser tube,
Laser pipe sleeve and laser tube seat, at least one pair of is offered on the inner surface of laser tube seat is used to install the spiral shell of laser tube protective case
Pit, and the center projections of the outer surface of laser tube seat are constituted for inserting that the slot that opens up of inner surface with sampling headstock is matched
Pin.
According to embodiments herein, the detection means include sampling inlet channel and blower fan outlet passageway, it is described enter
Gas passage is located at sampling head inside and dust cavity on same straight line, and described outlet passageway is connected with the blower fan apparatus
Logical, the laser that the laser tube is launched is with the inlet channel on an axis, and vertical with the fan outlet direction
Set, the blower fan is connected through a screw thread with the dust cavity, easy to disassemble and maintenance.Sensor also includes being located at dust chamber
Physical examination is surveyed the photoelectric conversion component of overlying regions and is arranged on the reflecting part of detection zone bottom, and wherein photoelectric tube is used for
The information that the laser that sends of LASER Light Source is radiated in detection zone refraction light produced by gas particles is received, while by the information
Conversion process is resent to the signal processing system for carrying display screen into signal.
The photoelectric conversion component is arranged at dust cavity top, and perpendicular to dust cavity, by cushion block and lower end
Dust cavity is connected.Described photoelectric conversion component include can dismantle and hermetically set photoelectric tube protective case, positioned at institute
State in housing and get lodged in the optical lens above the detection zone, be used to be received from the light positioned at optical lens top
Learn the photoelectric tube of the light irradiation information of lens transmission and for the information that the photoelectric tube is received to be converted into carrying display
The change-over circuit that the signal processing system of screen can be processed, described photoelectricity tube shell can seal setting, and the optical lens
Mirror, photoelectric tube, converter are arranged in described photoelectricity tube shell.The central bugled section of photoelectric tube protective case is and photoelectricity
The screw thread connected between base.
The laser that the laser tube is launched with the inlet channel on an axis, and with the fan outlet direction
It is vertically arranged.The center projections of the upper surface of laser tube seat cause photoelectric conversion component with the groove fit of sampling head base inner surface
It is fixed on inside sampling head.Space between the outside of laser tube seat and sampling casing is sampling inlet channel, laser tube seat
Left end sets tapered, and the vertex of a cone points to the horizontal median axis of full dirt sampling head, is conducive to sampling air inlet to sample.Sampling head and master
Cavity is connected by male-female engagement and glue is sealed and ensure that sealing.
The blower fan fixed cover is threadably secured in dust cavity right-hand member, and the motor of blower fan is set by motor fixed cover
In fan chamber right-hand member, fan outlet is arranged at fan chamber bottom, and extends to fan outlet through housing and big gas phase
Logical, fan outlet is embedded in sensor outer housing, and fan outlet is connected by screw thread with fan outlet and is easily installed and dismounting.
The photoelectric tube is arranged in photoelectric tube protective case, on photoelectricity base, photoelectric tube protective case and photoelectric tube
Seat is connected by external screw thread, and the photoelectric conversion component is connected by cushion block linking with the main chamber of lower section, and joining place is all used
Sealing is set.
The 5V direct current regulation circuits, high-pressure generating circuit, photoelectric current integrating circuit, change-over circuit, display circuit, pulse
Output circuit, light source mu balanced circuit, motor-drive circuit are arranged on two pieces of circuit boards of back side of panel, and solid by screw
It is fixed.
The present invention has advantages below compared with prior art：
(1) present invention is radiated at scattering principle produced on particle due to using by light, while in detection zone
Bottom be provided with reflecting part (not shown), laser light path is vertical with scattering light so that the light of scattering is completely by light
Line receiver component is received without being influenceed by laser light path, be compensate for from light path caused by light hole is excessive or too small
The inaccurate problem of measurement.
(2) set forth herein mechanized equipment structure be with the difference of traditional structure：Dust inlet channel and dust cavity
Horizontally disposed, (vertically disposed inlet channel is easily affected by gravity so that dust declines to advantageously form stable dust air-flow
It is too fast to be difficult measurement), there is refraction and cause that measurement is more accurate in the dust air-flow of stabilization.Meanwhile, fan outlet is set down, just
In causing that dust is more smoothly discharged using Action of Gravity Field, (horizontally disposed outlet is easily sent out to be not susceptible to dust accumulation phenomenon
Raw dust accumulation).
Additionally, the dust sensor is applied to the environment such as underground coal mine getting working face, tunnel, chamber, can be continuously automatic
Detect the dust concentration in surrounding air and be converted into frequency or digital data transmission to monitoring system central station.The sensing utensil
Have the advantage that：(1) infrared laser and import photomultiplier are used, dust measurement is accurate, stabilization；(2) new list is used
Piece machine and highly integrated digital circuit, make circuit structure simple, dependable performance；(3) infrared remote control adjustment zero point is realized, sensitivity,
The functions such as alarm point, easy to operate, adjustment is simple；(4) novel switched power supply is used, Overall Power Consumption is low；(5) can be according to different need
Want output frequency signal or data signal；(6) degree of protection is IP65；(7) excellent anti-electromagnetic interference capability.
Brief description of the drawings
Fig. 1 is the original of the mining intrinsic safety type dust sensing device based on light scattering method according to an embodiment of the invention
Reason block diagram；
Fig. 2 is the mining intrinsic safety type dust sensing device for being based on light scattering method according to an embodiment of the invention
Structural representation.
Specific embodiment
Below, the implementation with reference to accompanying drawing to technical scheme is described in further detail.
Although it will be appreciated by those of skill in the art that the following description is related to many of embodiment for the present invention
Ins and outs, but be only for not meaning that any limitation for illustrating the example of principle of the invention.The present invention can be applicable
Occasion outside different from ins and outs exemplified below, without departing from principle of the invention and spirit.
In addition, miscellaneous in order to avoid being limited to the description of this specification, in description in this manual, may pair can be
The portion of techniques details obtained in prior art data has carried out the treatment such as omission, simplification, accommodation, this technology for this area
Be will be understood by for personnel, and this does not interfere with the open adequacy of this specification.
The present invention is elaborated below in conjunction with the accompanying drawings.
Fig. 1 is the original of the mining intrinsic safety type dust sensing device based on light scattering method according to an embodiment of the invention
Reason block diagram；Fig. 2 is the mining intrinsic safety type dust sensing device for being based on light scattering method according to an embodiment of the invention
Structural representation.
As shown in Fig. 2 the detection means includes wiring board 1, copper post 2, CARBURIZING FURNACE FOR STAINLESS FASTENER 3, copper post 4, opening pan head screw
5th, full dirt sampling head 6, laser tube seat 7, laser pipe sleeve 8, laser tube (LASER Light Source) 9, sampling the casing 10, (inspection of dust cavity
Survey cavity) 11, cushion block 12, photoelectric conversion component base 13, photoelectric conversion component 14, Stainless Steel Shell 15, stainless steel hook 16,
Stainless steel M6 nuts 17, alarm lamp 18, photoelectric subassembly housing 19, blower fan fixed cover 20, fan chamber 21, motor fixed cover
22nd, motor 23, fan outlet 24, nameplate 25, aviation interface 26, CARBURIZING FURNACE FOR STAINLESS FASTENER 27, panel base plate 28, panel 29, striker
30。
As illustrated in fig. 1 and 2, outside dust laden air enters full dirt sampling head 6 by the suction of blower fan, (is hidden through guiding device
Fall extraneous light) enter detector darkroom (dust cavity 11).Directional light in darkroom intersects at a right angle with the visual field of light accepting part
Constitute sensitive volume (Fig. 1 bends dash area), when dust passes through sensitive volume, its 90 DEG C of direction scattering light inject light through slit
Electric multiplier tube (photoelectric tube 14), is converted into photoelectric current, through the electric signal that photoelectric current integrating circuit is converted into being directly proportional to scattering light.
The mass concentration of dust is calculated by amplifying circuit and A/D change-over circuits.The device is equipped with other work(with single-chip microcomputer as core
Energy auxiliary circuit, energy real-time detection and display environment dust concentration value, while output frequency or current signal supply remote collection.When
When concentration value reaches setting alarming value, sound and light alarm is sent automatically.Sensor adjustment zero point and sensitivity are realized by remote control
And the operation such as alarm point parameter setting.
Specifically, one end of the housing of the LASER Light Source 9 is connected with dust cavity 11, along a straight line (the axle in Fig. 2
Line) it is sequentially arranged (being from left to right in Fig. 2) full dirt sampling head 6, LASER Light Source 9, dust cavity 11, fan chamber 21, blower fan
Outlet 24 is connected with fan chamber 21.Meanwhile, the laser that LASER Light Source 9 is launched also with the full dirt sampling head 6, dust chamber
Body 11 and fan chamber 21 are on the same axis, i.e. above-mentioned part is horizontally disposed.Fan outlet 24 is located at fan chamber 21
Right side, is vertically arranged.
Alternatively, the arrangement order of above-mentioned part can be changed.For example, along a straight line (axis in Fig. 1) be sequentially arranged (from
It is left-to-right) LASER Light Source 9, dust cavity 11, fan chamber 21, full dirt sampling head 6, it is left that fan outlet 24 is located at dust cavity 11
Lower section, the lower section of LASER Light Source 9, for guiding air-flow to be discharged from lower left.
Specifically, photoelectric conversion component 14 is vertically installed in the top of dust cavity 11, and just the top of dust cavity 11 is led to
Hole, is connected by cushion block 12 with dust cavity 11 below.Photoelectric conversion component 14 includes to dismantle and hermetically setting
Photoelectric subassembly housing 19, be fixed on the optical lens (not drawn in figure) of the top through hole of the dust cavity 11, positioned at institute
Optical lens top is stated for receiving the photoelectric tube of the light irradiation information of optical lens transmission and for by photoelectric tube
The information of reception is converted into the converter of data signal, and the optical lens, photoelectric tube, converter are arranged on photoelectricity shell
In vivo.The central bugled section of photoelectric subassembly housing 19 is the screw thread being connected between photoelectric conversion component base 13.
Alternatively, the position of upper through-hole is faced in the lower inner wall of dust cavity 11, reflecting part is additionally provided with, is used for
The light of downward scattering is reflected upwards, to be received by photoelectric conversion component 14 such that it is able to more efficiently using the light of scattering
Energy.
Specifically, the space between the outside of sampling head laser tube seat 7 and sampling casing 10 forms sampling inlet channel,
The left end of laser tube seat 7 sets tapered, and the vertex of a cone points to the horizontal median axis of full dirt sampling head 6, is conducive to sampling air inlet to sample.
Specifically, blower fan fixed cover 20 is threadably secured in the right-hand member of dust cavity 11, and blower motor 23 is solid by motor
Surely set 22 is arranged at the right-hand member of fan chamber 21, and fan outlet 24 is arranged at the bottom of fan chamber 21, and is communicated with air.
Specifically, photoelectric conversion component 14 is arranged in photoelectric subassembly housing 19, installed in photoelectric conversion component base 13
On, photoelectric subassembly housing 19 is connected with photoelectric conversion component base 13 by external screw thread, and the photoelectric conversion component passes through cushion block
12 linkings are connected with the dust chamber 11 of lower section, and joining place is all set using sealing.
Specifically, the 5V direct current regulation circuits, high-pressure generating circuit, photoelectric current integrating circuit, change-over circuit, display electricity
Road, impulse output circuit, light source mu balanced circuit, motor-drive circuit are arranged on two pieces of circuit boards of back side of panel, and pass through
Screw is fixed.Button, LED display, signal lamp and power supply indicator are set and are located at the front of panel 29.Dust cavity 11
It is fixed on enclosure interior bottom surface by copper post 4.Alarm lamp 18 is arranged on sensor housing upper surface middle section.It is outside
Power-supply device is by aviation interface 26 for internal unit is powered.
In sum, the present invention is radiated at scattering principle produced on particle by light, while in detection zone
Bottom is provided with reflecting part so that the light of refraction is received by light receiver device assembly completely, and in the effect of light receiver device assembly
Under, the light intensity information conversion that will be received is resent to the signal processing system for carrying display screen in signal, by display
The data for shielding display directly read the content of dust in air, and whole detection process is to carry out in sealed states so that
The testing result degree of accuracy is high, additionally, simple structure of the present invention, easy to implement.
Finally, it will be appreciated by those of skill in the art that various modifications, change can be made to the above embodiment of the present invention
Type and replacement, it is each fallen within such as protection scope of the present invention defined in the appended claims.
Claims (7)
1. a kind of mining intrinsic safety type dust sensing device based on light scattering method, it is characterised in that including along same axis cloth
LASER Light Source (9), test chamber (11), fan assembly are put,
Wherein, the light extraction end of the LASER Light Source (9) is connected with one end of test chamber (11), LASER Light Source (9) institute
The laser of transmitting along the axis propagation,
Wherein, the mining intrinsic safety type dust sensing device also includes photoelectric conversion component (14), and it hangs down with the axis
Test chamber (11) top directly is placed in, just to the through hole on the test chamber (11) top,
Wherein, the fan assembly is used to for air to be measured to introduce the test chamber (11).
2. mining intrinsic safety type dust sensing device according to claim 1, it is characterised in that also include：
Positioned at the air inlet (6) of the prime of the test chamber (11), for air to be measured to be introduced into the test chamber (21)；
Positioned at the exhaust outlet (24) of the test chamber (11) rear class, for air to be measured to be arranged from the test chamber (11)
Go out,
Wherein, above-mentioned prime and rear class are to detect that the airflow direction of air is reference.
3. mining intrinsic safety type dust sensing device according to claim 2, it is characterised in that the LASER Light Source
And the fan assembly is respectively positioned on the rear class of the test chamber (11) (9).
4. mining intrinsic safety type dust sensing device according to claim 2, it is characterised in that the fan assembly position
In the rear class of the test chamber (11), prime of the LASER Light Source (9) positioned at the test chamber (11).
5. mining intrinsic safety type dust sensing device according to claim 3, it is characterised in that the test chamber
(11) space between rear end and the air inlet (6) forms sampling inlet channel, wherein with can block extraneous light
Guiding device.
6. mining intrinsic safety type dust sensing device according to claim 4, it is characterised in that the LASER Light Source
(9) space between outside and the air inlet (6) forms sampling inlet channel, wherein with can block extraneous light
Guiding device,
Wherein, the front end of the LASER Light Source (9) sets tapered, and the vertex of a cone points to the center of the air inlet (6).
7. the mining intrinsic safety type dust sensing device described in claim 1 to 6, it is characterised in that
Test chamber (11) lower inner wall faces the position of the through hole on the top, is additionally provided with reflecting part, for will be
The light of scattering reflects upwards downwards in the test chamber (11), to be received by the photoelectric conversion component (14).
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| CN201710206947.1A CN106908364A (en) | 2017-03-31 | 2017-03-31 | Mining intrinsic safety type dust sensing device based on light scattering method |
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| CN201710206947.1A CN106908364A (en) | 2017-03-31 | 2017-03-31 | Mining intrinsic safety type dust sensing device based on light scattering method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907504A (en) * | 2017-10-28 | 2018-04-13 | 东台市凯润精密机械股份有限公司 | A kind of filter daylighting camera lens of surrounding air turbidity detector |
| CN108169089A (en) * | 2017-12-31 | 2018-06-15 | 湖北兴业华德威安全信息技术股份有限公司 | A kind of laser dust sensor and dust concentration sampling zero formula measuring method of school |
| CN111520179A (en) * | 2020-05-19 | 2020-08-11 | 安徽宝龙电器有限公司 | Mining intrinsic safety smoke control device |
| WO2021089634A1 (en) | 2019-11-05 | 2021-05-14 | Centre National De La Recherche Scientifique | Current detector, associated sensor, system and method |
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| CN108169089A (en) * | 2017-12-31 | 2018-06-15 | 湖北兴业华德威安全信息技术股份有限公司 | A kind of laser dust sensor and dust concentration sampling zero formula measuring method of school |
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