CN201298012Y - Microcomputer laser dust monitor - Google Patents
Microcomputer laser dust monitor Download PDFInfo
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- CN201298012Y CN201298012Y CNU2008201226908U CN200820122690U CN201298012Y CN 201298012 Y CN201298012 Y CN 201298012Y CN U2008201226908 U CNU2008201226908 U CN U2008201226908U CN 200820122690 U CN200820122690 U CN 200820122690U CN 201298012 Y CN201298012 Y CN 201298012Y
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Abstract
The utility model relates to a microcomputer laser dust monitor, comprising a dark room provided with an air inlet, an air outlet and two return intakes, wherein a particle separation cutter is arranged on the bottom end of the air inlet; two separation plates are arranged between the air inlet and the air outlet; a light source is arranged on one end of the dark room, and an optical lens group and a photoelectric receiver are arranged in sequence on the other end of the dark room corresponding to the light source; two light emission holes are arranged on the two separation plates corresponding to the light source; the air outlet of the dark room is connected with a filter membrane sampler, an air extraction pump and a flow divider in sequence; one air outlet of the flow divider is connected with a filter; the filter is connected with the two return intakes by a pipeline; the photoelectric receiver is connected with a preamplifier, an integral circuit, an analog-to-digital converter and a single-chip microcomputer in sequence; the other air outlet of the flow divider is connected with a humidity sensor and a flow sensor in sequence; an air discharge opening is arranged on the flow sensor; the humidity sensor and the flow sensor are respectively connected with the single-chip microcomputer by data wires; and the single-chip microcomputer is internally provided with a humidity correction module, a dust concentration over-stand alarm threshold, a mass concentration transformation coefficient K value and a Chinese character library.
Description
Technical field
The utility model relates to a kind of detecting instrument, particularly about a kind of multi-functional micro computer laser dust instrument.
Background technology
At present, the present Research of domestic dust measurement is as follows: it is 200420047907.5 patent that my open name is called " laser dust instrument ", application number, name is called " Portable Microprocessor Based numeral dust instrument ", application number is the patent of CN98250379.2, it is 200520128020.3 patent that name is called " explosion-proof type Portable Microprocessor Based dust instrument ", application number, and name is called the paper of " LD-3C type micro computer laser dust instrument " and " the quick dust measuring instrument latest developments of labour hygiene dust monitoring relevant criterion and light scattering formula ".The name that Jiangsu Prov. Laser Research Inst. delivers is called " PC-3A type laser respirable dust follow-on test instrument " and " pocket laser respirable dust follow-on test instrument ", delivers magazine is the paper of 2003 12 phases for " dual-use technology and product ", the time of delivering, it has proposed PC-3A type laser inhalable dust concentration follow-on test instrument, this instrument is except that having the LED demonstration, it also has the self-correcting function, its humidity correction factor is 0.1～9.9, but this appliance requires is provided with correction manually according to different humidity.The name that the development of department of physics of BJ University of Aeronautics ﹠ Astronautics Testing Technology Study chamber is delivered is called the paper of " development of portable multi-function dust gauge ", its introduction be the apparatus that a kind of portable multi-function is measured smoke content in the flue emission.The name that Donghua University's Information Institute is delivered is called the paper of " based on the flue dust analyzer wireless remote control system of built-in Linux ", and it proposes a kind of flue dust analyzer wireless remote control system.It is 00246069.6 patent that name is called " beta-ray dust measuring instrument ", the patent No., has the constant-current controller of constant current sampling pump and temperature compensation in the beta-ray dust measuring instrument of its proposition.The paper that is called " development of flue dust (dust) concentration on-line monitoring instrument " that the name that School of Environment ﹠ Energy of Southeast China University delivers is called that name that " a kind of research of new pattern laser dust concentration on-line measurement instrument ", west of Liaoning ecologic environment research institute of Bohai University deliver is called that " HG-HC intelligence flue dust dust on-line monitoring instrument " and Northeastern University deliver all is to introduce dust concentration on-line measurement instrument.Name is called " JFC-1 laser dust concentration measuring apparatus ", is published in the paper in 2006 12 3 phases of volume " the sensor world ", mainly is the renewal product of " filter membrane sampling-weight method ".Hunan Inst. of Labour Protection in Non-Ferrous Metallurgy delivers, name is called " development of the quick dust gauge of HL-I type microcomputer ", is early stage photoelectric examination of dust sampler, and it has adopted repeatedly subtraction of counting.Name is called " the portable AC/DC dust sampler of electronics ", application number is that the dust gauge that proposes in the paper of the patent of CN94207497.1 and " the pocket microcomputer dust gauge of XC-1 " that Huatang Science ﹠ Tech. Development Co., Ltd., Beijing delivers has constant current control or constant current sampling function respectively.
The present Research of external dust measurement is as follows: it all is one of product of introducing U.S. RP company that name is called the paper comparison of the French ESA MP101M of company beta-ray dust measuring instrument " U.S. RP company trace vibration balance dust gauge with ", " analyses of Common failure and the method for removing of the automatic dust gauge of 1400A micro oscillation balance " and the U.S., that be called " Thermo RP 1400a ambient atmosphere particle monitoring instrument ", promptly
Series RP-1400a monitor, it is real-time online measuring (per two seconds are new data more) continuously, adopt the direct quality weight method of filter membrane collecting granules thing, and be applicable to PM10, PM2.5, PM1 or TSP sampling head, precision is+/-1.5ug/m3 (hourly average mass concentration) ,+/-0.5ug/m3 (24 hourly average mass concentration)." the explosion-proof intelligent digital dust of the SIDEPAK AM510 instrument " that U.S. Technical Sourcing Internation produces, its built-in cutter can be selected " none " (nothing), 1.0,2.5 or 10 microns, and can show dust concentration in real time.
Through comparative analysis as can be seen, the dust measurement of telling about in above-mentioned home and abroad patent and the document only relates to the constant-current controller, filter membrane sampling-weight method, light scattering principle of its humidity correction, self-correcting function, constant current sampling pump and temperature compensation, part characteristics such as real-time online measuring, built-in cutter continuously respectively, but the dust measurement with above all characteristics yet there are no report.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides a kind of multiple functional, high stability and the high micro computer laser dust instrument of measuring accuracy.
For achieving the above object, the utility model is taked following technical scheme: a kind of micro computer laser dust instrument, it is characterized in that: it comprises: one has an air intake opening, one gas outlet, the darkroom of two return-air mouths, the bottom of described air intake opening connects a removable separate particles cutter, two dividing plates are installed every the gas passage of establishing between described air intake opening and the gas outlet, described darkroom one end is provided with the light source that is produced by a laser generator, a corresponding optical lens group and the photelectric receiver of being disposed with of the other end in described darkroom with described light source, the corresponding light hole that offers with described light source on described two dividing plates; The gas outlet in described darkroom connects a filter membrane sampler, an aspiration pump and a shunt in regular turn; Described shunt has two outlets, and wherein an outlet connects a filtrator, and described filtrator connects the two return-air mouths that described darkroom is positioned at the two dividing plates outside by pipeline; Described photelectric receiver connects a prime amplifier, an integrating circuit, an analog to digital converter and a single-chip microcomputer in regular turn; Another gas outlet on the described shunt connects a humidity sensor and a flow sensor successively, offers an exhausr port on the described flow sensor; Described humidity sensor, flow sensor and laser generator are connected described single-chip microcomputer by data line respectively, preset humidity correcting module, dust concentration exceed standard alarm threshold value, mass concentration conversion coefficient K value and Chinese character base in the described single-chip microcomputer.
Described aspiration pump connects described single-chip microcomputer by a constant-current controller.
Described laser generator connects described single-chip microcomputer by a laser power control.
Preset the mass concentration of dust and the relational expression between the humidity correction factor in the described humidity correcting module:
C＝(R—B)×K×F
F＝f(RH)
Wherein: F is a humidity correction factor, B is the substrate value of micro computer laser dust instrument, RH is the real-time humidity of air that described humidity sensor records, and R is the relative mass concentration that light path system records, and K is the mass concentration conversion coefficient that is stored in the corresponding places in the described single-chip microcomputer.
The demonstration output port of described single-chip microcomputer is connected with a LCD; The I/O interface of described single-chip microcomputer is connected with keyboard; The printout port of described single-chip microcomputer is connected with a printer; PC communication serial line interface is arranged on the described single-chip microcomputer, and this interface connects a wireless transmit, receiving trap.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is owing to be provided with a humidity sensor, in single-chip microcomputer, be provided with a humidity correcting module, and in the humidity correcting module, be provided with the mass concentration of dust granules thing and the relational expression between the humidity correction factor, therefore, the utility model not only can detect the dust granules substrate concentration, can also detect the air humidity of tested gas place environment, and revise the influence of humidity automatically, and then obtain the mass concentration C of dust (particle) more accurately to dust (particle) mass concentration C.2, because aspiration pump of the present utility model connects single-chip microcomputer by a constant-current controller, when the tested gas flow that the pneumatic sensor that receives when single-chip microcomputer is carried diminishes, single-chip microcomputer sends the instruction that increases rate of air sucked in required by constant-current controller to aspiration pump, thereby realize the closed-loop control of intake air flow, guarantee the constant of filter membrane sampler sampling flow.3, because laser generator of the present utility model connects single-chip microcomputer by a laser power control, the power variation of source light flows to single-chip microcomputer by a data line, single-chip microcomputer sends steering order by laser power control to laser generator, thereby realize the closed-loop control of Laser emission power, make the emissive porwer of laser constant, and then improve laser dust (particle) instrument measuring stability.4, owing to also preset Chinese character base in the single-chip microcomputer of the present utility model, the demonstration output port of single-chip microcomputer is connected with a LCD, and therefore, the utility model can show all detection information by the LCD Chinese character.5, because the I/O interface of single-chip microcomputer of the present utility model is connected with keyboard, therefore, can directly pass through keyboard input instruction and data.6, because the printout port of single-chip microcomputer of the present utility model is connected with a printer, therefore, can all testing results be printed by printer.7, because single-chip microcomputer of the present utility model has PC communication serial line interface, therefore, can connect a wireless transmit, receiving trap, detection information is carried out long-range emission or reception by this interface.7, owing to the utlity model has a light path self-cleaning air curtain, therefore, can guarantee that the high tested gas barrier of device on the light path system and dust content opens, not contaminated, further improved the measurement accuracy of dust concentration.The utility model can be widely used in the dust detection of various public places or site for labour or outside atmosphere environment, particularly in humidity variation environment greatly.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1, the laser dust instrument that the utility model provides comprises an air intake opening 1, connects a removable separate particles cutter 2 in the bottom of air intake opening 1, and separate particles cutter 2 connects a darkroom 4 by a gas channel 3.Separate particles cutter 2 can adopt the separate particles cutter of PM10, PM5, PM2.5 or PM1 model according to the tested dust under the varying environment, to realize PM10, PM5, PM2.5 or many kinds of separate particles cutters of PM1 compatibility.
Darkroom 4 one ends are provided with a light source 5.Light source 5 connects a laser generator 6, a laser power control 7 and an one chip microcomputer (abbreviation single-chip microcomputer) 8 successively.Laser generator 6 adopts the semiconductor laser instrument, laser power control 7 links to each other with a single-chip microcomputer 8 by a control line, the power variation of light source 5 light flows to single-chip microcomputer 8 by a data line, send steering order by laser power control 7 to laser generator 6 by single-chip microcomputer 8 again, thereby realize the closed-loop control of Laser emission power, make the emissive porwer of laser constant, and then improve the utility model measuring stability.Wherein, preset humidity correcting module, dust (particle) concentration over-standard alarm threshold value and Chinese character base in the single-chip microcomputer 8.
The other end in darkroom 4 is provided with a photelectric receiver 9, photelectric receiver 9 and the light source 5 middle optical lens group 10 that are provided with, be provided with two dividing plates 11 between optical lens group 10 and the light source 5, two dividing plates 11 lay respectively at both sides, gas channel 3 below, all offer on two dividing plates 11 and light source 5 and optical lens group 10 corresponding light holes 12, leave the gap between the lower end of dividing plate 11 and the darkroom 4.
The below in darkroom 4 is provided with a gas outlet 13 relative with gas channel 3, tested gas 13 enters a filter membrane sampler 14 through back, darkroom 4 along the gas outlet, filter membrane sampler 14 is when collecting dust (particle), analyze the composition of collected dust (particle), and the mass concentration conversion coefficient that can obtain this place is the K value, and is stored in the single-chip microcomputer 8.The outlet of filter membrane sampler 14 connects an aspiration pump 15 by pipeline, and the other end of aspiration pump 15 connects a shunt 16 by pipeline.
Offer two outlets 17,18 on the shunt 16, outlet 17 connects a humidity sensor 19 by pipeline.The tested gas humidity signal that humidity sensor 19 will be sensed transfers to single-chip microcomputer 8 by a data line.Simultaneously, humidity sensor 19 also connects a flow sensor 20 by a pipeline, and the flow signal of the tested gas that flow sensor 20 will be sensed is delivered to single-chip microcomputer 8 by a data line.The dust of collecting on filter membrane sampler 14 (particle) thickens, when tested gas flow is diminished, single-chip microcomputer 8 is by being connected the constant-current controller 21 between itself and the aspiration pump 15, send the instruction that increases rate of air sucked in required to aspiration pump 15, thereby realize the closed-loop control of intake air flow, guarantee the constant of filter membrane sampler 14 sampling flows.Exhausr port 22 on the flow sensor 20 is as the passage of discharging tested gas.
The demonstration output terminal of single-chip microcomputer 8 is connected with a LCD 29, in conjunction with the Chinese character base that presets in the single-chip microcomputer 8, can show all detection information by Chinese character.The printer 30 that all detection information can connect by the microprinting output port that has on the single-chip microcomputer 8 directly prints.Be connected with the keyboard 31 that is used for input instruction and data on the I/O interface of single-chip microcomputer 8, and PC communication serial line interface 32, this interface adopts the RS232 interface, be used for carrying out both-way communication with PC, can import and store the mass concentration conversion coefficient (K value) of 100 kinds of left and right sides different places from PC, promptly can directly call data of database, and needn't detect, accumulate the K value again.Can also connect a wireless transmit and receiving trap 33 by PC communication serial line interface 32, be used for emission or receive the detected information of the utility model.
The utility model also is provided with the calibrator unit of standard scatter plate self calibration system as instrument, it is the optical device of a standard, when instrument was made as align mode, the scattering with standard scatter plate self calibration system squeezes into simulation particle in the light path came calibration instrument as the standard scattered light.
In the foregoing description, power supply adopts the Ni-MH rechargeable battery, can use continuously 8 hours, and be equipped with power supply adaptor.
The utility model is fit to dust mass concentration, standard scatter plate self calibration, dust concentration that public place dust (particle) detects and exceeds standard and report to the police and general detections such as timing sampling that suitable atmospheric environment detects, and under the labour hygiene pattern, according to industry hygiene standard (GBZ1-2002) and workplace adverse factor exposure limit (GBZ2-2002) standard, calculate time weighted average (TWA) and STEL (STEL).The utility model has also increased the measurement of surrounding air humidity newly, and by the humidity correcting module in the single-chip microcomputer 8, eliminates the influence of humidity to the mass concentration of dust (particle) automatically, thereby make the mass concentration of the dust (particle) that records more accurate.
During the utility model operation, at first, tested gas is inhaled into air intake opening 1, separate through separate particles cutter 2, after removing thick dust (particle), by gas channel 3, darkroom 4, filter membrane sampler 14 and aspiration pump 15, by shunt 16 tested gas is divided into two-way then successively.Wherein one road tested gas enters darkroom 4 once more by behind the filtrator 23, and light path is carried out self-cleaning.Dust (particle) produces scattered light under the infrared laser irradiation that light source 5 sends, after the scattered light light intensity signal receives through photelectric receiver 9, again in regular turn by prime amplifier 26, integrating circuit 27 and analog to digital converter 28, be converted into the relative mass concentration R (CPM) that the per minute step-by-step counting that is directly proportional with dust (particle) concentration is a dust (particle), and be transported to single-chip microcomputer 8.Simultaneously, by humidity sensor 19 and flow sensor 20, the real-time humidity RH of air and the gas flow signal of the tested gas that humidity sensor 19 and flow sensor 20 will be sensed respectively flow to single-chip microcomputer 8 to the tested gas in another road in regular turn.
The real-time humidity RH of air of the tested gas that records according to above humidity sensor 19, the relative mass concentration R (CPM) that light path system records and be stored in the mass concentration conversion coefficient K (mg/m3CPM) of the corresponding places in the single-chip microcomputer 7, the humidity correcting module that presets in the single-chip microcomputer 8 can utilize the following formula that presets within it that the mass concentration C (mg/m3) of dust (particle) is calculated, and its calculating formula is as follows:
C＝(R—B)×K×F
F＝f(RH)
In the formula: F is a humidity correction factor; B is the substrate value (CPM) of micro computer laser dust detector.
The mass concentration C of the dust granules thing in the following formula has utilized the humidity correcting module, and correction air humidity is to the influence of the mass concentration C of dust (particle) automatically.When the mass concentration C of the dust that records (particle) surpassed dust (particle) the concentration over-standard alarm threshold value that presets in the single-chip microcomputer 8, single-chip microcomputer 8 sent alarm command.Therefore, the utility model can also detect the air humidity of tested gas place environment in real time continuously by humidity sensor 19, and according to the ambient humidity variation, the measurement result of dust (particle) concentration is revised automatically, obtain more accurate dust (particle) concentration.
In the various embodiments described above; the structure of each parts, the position is set and connects and all can change to some extent; on the basis of technical solutions of the utility model,, should not get rid of outside protection domain of the present utility model improvement and the equivalents that individual component is carried out.
Claims (5)
1, a kind of micro computer laser dust instrument, it is characterized in that: it comprises: one has the darkroom of an air intake opening, a gas outlet, two return-air mouths, the bottom of described air intake opening connects a removable separate particles cutter, two dividing plates are installed every the gas passage of establishing between described air intake opening and the gas outlet, described darkroom one end is provided with the light source that is produced by a laser generator, a corresponding optical lens group and the photelectric receiver of being disposed with of the other end in described darkroom with described light source, the corresponding light hole that offers with described light source on described two dividing plates; The gas outlet in described darkroom connects a filter membrane sampler, an aspiration pump and a shunt in regular turn; Described shunt has two outlets, and wherein an outlet connects a filtrator, and described filtrator connects the two return-air mouths that described darkroom is positioned at the two dividing plates outside by pipeline; Described photelectric receiver connects a prime amplifier, an integrating circuit, an analog to digital converter and a single-chip microcomputer in regular turn; Another gas outlet on the described shunt connects a humidity sensor and a flow sensor successively, offers an exhausr port on the described flow sensor; Described humidity sensor, flow sensor and laser generator are connected described single-chip microcomputer by data line respectively, preset humidity correcting module, dust concentration exceed standard alarm threshold value, mass concentration conversion coefficient K value and Chinese character base in the described single-chip microcomputer.
2, a kind of micro computer laser dust instrument as claimed in claim 1, it is characterized in that: described aspiration pump connects described single-chip microcomputer by a constant-current controller.
3, a kind of micro computer laser dust instrument as claimed in claim 1, it is characterized in that: described laser generator connects described single-chip microcomputer by a laser power control.
4, a kind of micro computer laser dust instrument as claimed in claim 2, it is characterized in that: described laser generator connects described single-chip microcomputer by a laser power control.
5, as claim 1 or 2 or 3 or 4 described a kind of micro computer laser dust instrument, it is characterized in that: the demonstration output port of described single-chip microcomputer is connected with a LCD; The I/O interface of described single-chip microcomputer is connected with keyboard; The printout port of described single-chip microcomputer is connected with a printer; PC communication serial line interface is arranged on the described single-chip microcomputer, and this interface connects a wireless transmit, receiving trap.
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| CNU2008201226908U CN201298012Y (en) | 2008-09-26 | 2008-09-26 | Microcomputer laser dust monitor |
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| CNU2008201226908U CN201298012Y (en) | 2008-09-26 | 2008-09-26 | Microcomputer laser dust monitor |
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| CN103245637A (en) * | 2013-04-16 | 2013-08-14 | 北京清风康华科技有限公司 | Method for converting particle number concentration measured by using light scattering method into mass concentration and detector |
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| CN104359807A (en) * | 2014-10-28 | 2015-02-18 | 苏州市职业大学 | Handheld type PM2.5 dust detector |
| CN105181546A (en) * | 2015-10-27 | 2015-12-23 | 扬中市南方矿用电器有限公司 | Mine-used dust concentration sensor having automatic cleaning function |
| CN105466825A (en) * | 2015-12-28 | 2016-04-06 | 常熟市矿山机电器材有限公司 | Dust remote detection system |
| CN105806756A (en) * | 2016-01-30 | 2016-07-27 | 济南大陆机电股份有限公司 | Method for correcting indoor and outdoor PM2.5 monitoring results by virtue of meteorological parameters |
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| CN103245637B (en) * | 2013-04-16 | 2016-03-16 | 北京清风康华科技有限公司 | A kind of Particle number concentration recorded by light scattering method is converted to method and the detector of mass concentration |
| CN104198346B (en) * | 2014-08-26 | 2016-04-20 | 北京绿林创新数码科技有限公司 | A kind of mobile phone control type dust sensor monitoring system and using method thereof |
| CN104198346A (en) * | 2014-08-26 | 2014-12-10 | 北京绿林创新数码科技有限公司 | Mobile phone controlled dust sensor monitoring system and use method thereof |
| CN104359807A (en) * | 2014-10-28 | 2015-02-18 | 苏州市职业大学 | Handheld type PM2.5 dust detector |
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| CN107490538A (en) * | 2017-10-09 | 2017-12-19 | 江苏绿尚环保科技有限公司 | A kind of environmentally friendly dust instrument |
| CN107884322A (en) * | 2017-10-30 | 2018-04-06 | 重庆广睿达科技有限公司 | The dynamic calibration method and monitor that a kind of chemical constituent for eliminating particulate matter influences |
| CN107941666A (en) * | 2017-10-30 | 2018-04-20 | 重庆广睿达科技有限公司 | The dynamic calibration method and monitor that a kind of humiture for eliminating particulate matter influences |
| CN109557009A (en) * | 2019-01-22 | 2019-04-02 | 深圳市无眼界科技有限公司 | A kind of wide range particulate matter detection means |
| CN109557009B (en) * | 2019-01-22 | 2024-03-29 | 深圳市无眼界科技有限公司 | Wide-range particulate matter detection device |
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