CN204008387U - A kind of laser dust particle counter - Google Patents
A kind of laser dust particle counter Download PDFInfo
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- CN204008387U CN204008387U CN201420488121.0U CN201420488121U CN204008387U CN 204008387 U CN204008387 U CN 204008387U CN 201420488121 U CN201420488121 U CN 201420488121U CN 204008387 U CN204008387 U CN 204008387U
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- test chamber
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- 239000002245 particle Substances 0.000 title claims abstract description 25
- 239000000428 dust Substances 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000003993 interaction Effects 0.000 abstract description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of laser dust particle counter, comprise gas path device, optical system and Circuits System, described Circuits System comprises power supply, supply voltage processing module, air pump control circuit, test chamber and photoelectric conversion unit, voltage examination module, main control unit, storage unit, touch-control display module, bluetooth module, button; Described power supply is connected with supply voltage processing module; Described supply voltage processing module is also connected with air pump control circuit, test chamber and photoelectric conversion unit, main control unit, button; Described main control unit is also screened module, storage unit, touch-control display module, bluetooth module, button with test chamber and photoelectric conversion unit, voltage and is connected; Described test chamber and photoelectric conversion unit are also screened module with voltage and are connected.Its advantage is: provide that a kind of man-machine interaction is good, easy to operate, portable, the laser dust particle counter of low-power consumption.
Description
Technical field
The utility model relates to a kind of laser dust particle counter, particularly a kind of Circuits System of laser dust particle counter.
Background technology
Laser dust particle counter is the instrument that quantity for measuring dirt particle in air and particle diameter distribute, be widely used in the industries such as medicine, electronics, precision optical machinery, colored picture tube manufacture, microorganism, realize worktable to various lustration classes, decontamination chamber, the clean-up effect of cleaning shop, clean rank and monitor, to guarantee the quality of product.
Laser dust particle counter ultimate principle is that the exploring laser light of optical sensor is received and produce pulse signal after dust particle scattering by light activated element, this pulse signal is output and amplifies, then carry out digital signal processing, by comparing with standard particle signal, by comparing result with different Parametric Representations out.
Existing laser dust counter is made up of gas path device, optical system and Circuits System etc. conventionally.Wherein, gas path device comprises air pump and filtrator etc., and it is used for gathering gaseous sample to be measured and produces sampling flow (flow is generally between 2.83 liters/min～28.3 liters/min); Optical system, wherein light source is the space of carrying out particulate observation for generation of laser, measurement chamber, collected gaseous sample will from measuring, chamber be passed, photodetector is the photoelectric commutator that scattered energy is converted to electric signal; Circuits System has been exactly the circuit such as the amplification, examination, counting of pulse signals.
Existing laser dust counter, counting shows multiplex LED or monochromatic LCD smaller screen, and single shows that information is few, need to realize content demonstration in conjunction with a large amount of buttons or combination button, and not easy to operate, man-machine interaction is poor; Historical information is stored in this locality, can only pass through serial ports, USB is wired is connected with computer, portable poor; Overall power is large, and lithium battery power supply need to charge repeatedly, and battery life is short.
Utility model content
The purpose of this utility model is to provide a kind of laser dust particle counter, and the particularly improvement to original Circuits System, to overcome the shortcoming of the prior art of mentioning in background technology.
In order to realize the purpose of this utility model, by realizing by the following technical solutions:
A kind of laser dust particle counter, comprise gas path device, optical system and Circuits System, described Circuits System comprises power supply, supply voltage processing module, air pump control circuit, test chamber and photoelectric conversion unit, voltage examination module, main control unit, storage unit, touch-control display module, bluetooth module, button; Described power supply is connected with supply voltage processing module; Described supply voltage processing module is also connected with air pump control circuit, test chamber and photoelectric conversion unit, main control unit, button; Described main control unit is also screened module, storage unit, touch-control display module, bluetooth module, button with test chamber and photoelectric conversion unit, voltage and is connected; Described test chamber and photoelectric conversion unit are also screened module with voltage and are connected.
Described supply voltage processing module is to air pump control circuit, test chamber and photoelectric conversion unit, main control unit power supply, and supply voltage processing module is combined with button, main control unit, and generation is long to be operated by switching on and shutting down.
Described test chamber and photoelectric conversion unit, wherein laser diode wave length 780nm, Photoelectric Detection adopts pin photodiode, and IV conversion realizes circuit one-level amplifies, and logarithmic amplification is realized non-linear secondary and is amplified.
Described voltage is screened module and is realized hyperchannel comparison by comparer, screens particle diameter, and wherein comparator reference end adopts TL431 voltage stabilizing, and comparer adopts hysteresis loop comparator.
Described touch-control display module, wherein touches and drives chip to adopt TSC2046 chip, and screen drives chip to adopt SSD1963 chip.
Described main control unit utilizes timer internal to complete hyperchannel counting; Main control unit is controlled LCD brightness and switch by PWM; Main control unit detects electric weight by AD, turning off system power supply when brownout; Digital I/O detects charger insertion and extracts.Described main control unit adopts Cortex M3 chip.Described main control unit adopts Cortex M3 chip to select the STM32F103ZET6 of ST company.
Described memory module adopts SD card;
Described bluetooth module is principal and subordinate's one bluetooth module.
The beneficial effects of the utility model are: adopt touch control and large scale color LCD to show, and rich display information, manipulation is simple; Storage adopts can plug SD card, is convenient to access historical information; Blue tooth interface from interface, be convenient to be connected with PC, mobile phone, the application program access corpuscular counter by PC, mobile phone, parameters or read historical data, the main interface of blue tooth interface, can be connected with blue-tooth printer, printing relevant information; Adopt low power dissipation design, rely on inner high-performance lithium battery, stream time is no less than 8 hours; As required, control screen switching time, the operational use time is no less than 16 hours, and working time length is domestically leading.Provide on the whole that a kind of man-machine interaction is good, easy to operate, portable, the laser dust particle counter of low-power consumption.
Brief description of the drawings
Fig. 1 is the structured flowchart schematic diagram of the utility model laser dust particle counter Circuits System.
Wherein, the symbol description of Fig. 1 is as follows:
101, power supply, 102, supply voltage processing module, 103, air pump control circuit, 104, test chamber and photoelectric conversion unit, 105, voltage is screened module, and 106, main control unit, 107, storage unit, 108, touch-control display module, 109, bluetooth module, 110, button.
Embodiment
A kind of laser dust particle counter, comprise gas path device, optical system and Circuits System, described Circuits System comprises power supply 101, supply voltage processing module 102, air pump control circuit 103, test chamber and photoelectric conversion unit 104, voltage examination module 105, main control unit 106, storage unit 107, touch-control display module 108, bluetooth module 109, button 110; Described power supply 101 is connected with supply voltage processing module 102; Described supply voltage processing module 102 is also connected with air pump control circuit 103, test chamber and photoelectric conversion unit 104, main control unit 106, button 110; Described main control unit 106 is also screened module 105, storage unit 107, touch-control display module 108, bluetooth module 109, button 110 with test chamber and photoelectric conversion unit 104, voltage and is connected; Described test chamber and photoelectric conversion unit 104 are also screened module 105 with voltage and are connected.
Power supply 101: adopt lithium battery power supply, voltage range 9-12.6V.
Supply voltage processing module 102: because of energy consumption, voltage, in the time that 9-12.6V fluctuates, still keeps supplying with the constant voltage of each correlation module: wherein air pump control circuit 103 is 9V, and main control unit 106 is by IO gauge tap at power supply 101; Test chamber and photoelectric conversion unit 104 be+12V ,-12V ,+5V; Main control unit 106 is 5V.
Air pump control circuit 103: adopt minipump, voltage 9V, 2.83 liters/min of flows.
Test chamber and photoelectric conversion unit 104: adopt 780nm near-infrared laser diode as light source, cavity completes the collection of scattered light, adopts pin photodiode to realize opto-electronic conversion.It is very faint that light is converted to electric signal, changes by IV, and secondary logarithmic amplification circuit is realized signal and amplified; IV conversion, the selected amplifier dual power supply+12V of secondary logarithmic amplification ,-12V.Laser diode constant current source drives, 5V power supply, master control IO gauge tap.
Voltage is screened module 105: comparator reference end adopts TL431 voltage stabilizing, and comparer adopts hysteresis loop comparator, improves the stability of comparer, directly exports Transistor-Transistor Logic level.
Main control unit 106:5V power supply, is converted to 3.3V by AM1117-3.3, supplies with main control chip STM32F103ZET6.Main control unit 106 is realized interface display, channel counts, data preservation, data interaction, detection cell voltage, charger and is inserted and extract.
Storage unit 107: adopt SD card as storage medium.
Touch-control display module 108: adopt 4.3 or 5 cun of color LCDs, touch and drive chip to adopt TSC2046, screen drives chip to adopt SSD1963.Main control unit 106 can be controlled screen intensity by PWM, and switch screen significantly reduces system power dissipation.System arranges 4 kinds of display modes: full brightness, half intensity, 55_5(are intermittently turned off and opened for 5 seconds for 55 seconds, and button or touch are opened 5 seconds), complete shut-down (button or touch are opened 5 seconds).
When operation, system boot enters measures interface: click and measure button, start to measure; Again click, stop measuring; Click UCL button, be UCL and measure.
Click data, is switched to data interface, shows historical data, and button shows one, the next one.
Click figure line, be switched to figure line interface, illustrate and show historical data by two-dimensional coordinate.
Click and arrange, systematic parameter is set.
Click help, show lustration class standard.
Bluetooth module 109: adopt HC-05 principal and subordinate one bluetooth module, by AT instruction, mode of operation is set: from interface, be convenient to be connected with PC, mobile phone, access corpuscular counter by the application program on PC, mobile phone, parameters or read historical data; Main interface, can be connected with blue-tooth printer, prints relevant information.
Button 110: complete long by switching on and shutting down action, the historical data of leafing through in conjunction with supply voltage processing module 102, main control unit 106.
Whole device is finally implemented size can reach 100*200*50mm.
Claims (7)
1. a laser dust particle counter, comprise gas path device, optical system and Circuits System, it is characterized in that: described Circuits System comprises power supply (101), supply voltage processing module (102), air pump control circuit (103), test chamber and photoelectric conversion unit (104), voltage examination module (105), main control unit (106), storage unit (107), touch-control display module (108), bluetooth module (109), button (110); Described power supply (101) is connected with supply voltage processing module (102); Described supply voltage processing module (102) is also connected with air pump control circuit (103), test chamber and photoelectric conversion unit (104), main control unit (106), button (110); Described main control unit (106) is also screened module (105), storage unit (107), touch-control display module (108), bluetooth module (109) with test chamber and photoelectric conversion unit (104), voltage, button (110) is connected; Described test chamber and photoelectric conversion unit (104) are also screened module (105) with voltage and are connected.
2. laser dust particle counter as claimed in claim 1, it is characterized in that: described supply voltage processing module (102) is to air pump control circuit (103), test chamber and photoelectric conversion unit (104), main control unit (106) power supply, and supply voltage processing module (102) produces long by switching on and shutting down operation with button (110), main control unit (106) combination.
3. laser dust particle counter as claimed in claim 1, it is characterized in that: described test chamber and photoelectric conversion unit (104), wherein laser diode wave length 780nm, Photoelectric Detection adopts pin photodiode, IV conversion realizes circuit one-level amplifies, and logarithmic amplification is realized non-linear secondary and amplified.
4. laser dust particle counter as claimed in claim 1, is characterized in that: described voltage is screened module (105), and wherein comparator reference end adopts TL431 voltage stabilizing, and comparer adopts hysteresis loop comparator.
5. laser dust particle counter as claimed in claim 1, is characterized in that: described touch-control display module (108), and wherein touch and drive chip to adopt TSC2046 chip, screen drives chip to adopt SSD1963 chip.
6. laser dust particle counter as claimed in claim 1, is characterized in that: described main control unit (106) utilizes timer internal to complete hyperchannel counting; Main control unit (106) is controlled LCD brightness and switch by PWM; Main control unit (106) detects electric weight by AD, turning off system power supply when brownout; Digital I/O detects charger insertion and extracts.
7. laser dust particle counter as claimed in claim 6, is characterized in that: described main control unit (106) adopts Cortex M3 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488121.0U CN204008387U (en) | 2014-08-28 | 2014-08-28 | A kind of laser dust particle counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488121.0U CN204008387U (en) | 2014-08-28 | 2014-08-28 | A kind of laser dust particle counter |
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| Publication Number | Publication Date |
|---|---|
| CN204008387U true CN204008387U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420488121.0U Expired - Fee Related CN204008387U (en) | 2014-08-28 | 2014-08-28 | A kind of laser dust particle counter |
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| Country | Link |
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| CN (1) | CN204008387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181085A (en) * | 2014-08-28 | 2014-12-03 | 无锡硅奥科技有限公司 | Laser dust particle counter |
-
2014
- 2014-08-28 CN CN201420488121.0U patent/CN204008387U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181085A (en) * | 2014-08-28 | 2014-12-03 | 无锡硅奥科技有限公司 | Laser dust particle counter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 |