CN106908388A - Strength of fluid standard authentication detecting system on plant chimney stalk discharge - Google Patents
Strength of fluid standard authentication detecting system on plant chimney stalk discharge Download PDFInfo
- Publication number
- CN106908388A CN106908388A CN201710157362.5A CN201710157362A CN106908388A CN 106908388 A CN106908388 A CN 106908388A CN 201710157362 A CN201710157362 A CN 201710157362A CN 106908388 A CN106908388 A CN 106908388A
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- circuit
- psd
- strength
- detecting system
- plant chimney
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06113—Coherent sources; lasers
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses the strength of fluid standard authentication detecting system discharged on plant chimney stalk, including power circuit, laser, optical system, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor, LED display module, keyboard and drive circuit, the power circuit, laser, optical system, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor are sequentially connected, the LED display module, keyboard and drive circuit are connected with microprocessor respectively, and the LED display module is connected with drive circuit.Present invention application semiconductor position sensitive device PSD detects the strength of fluid of plant chimney stalk, and designs peripheral circuit, improves the antijamming capability of detecting system, further increases the reliability of detecting system, makes waste discharge up to standard.
Description
Technical field
The present invention relates to strength of fluid detection, and in particular to the strength of fluid standard authentication detection on plant chimney stalk discharge
System.
Background technology
Concentration be weigh plant chimney stalk discharge whether a very important index up to standard, in order to reach discharge standard,
Manufacturing enterprise also requires that the concentration to river after discharge is supervised in addition to being tested to the concentration of waste water before discharging
Control, laboratory inspection is sampling inspection, and complex steps, poor real is difficult to control product quality, relies solely on this method
It is difficult to meet emission request.On-line detecting system can make operating personnel grasp waste water and river at any time during discharge of wastewater
The situation of change of concentration, takes measures in time, realizes real-time control, make product concentration control in the range of requiring this to carrying
High yield quality has very important significance, but prior art often has that detection is unstable.
The content of the invention
The technical problems to be solved by the invention are unstable detectable concentrations, it is therefore intended that provided on plant chimney stalk discharge
Strength of fluid standard authentication detecting system, improve detectable concentration stability and reliability.
The present invention is achieved through the following technical solutions：
Strength of fluid standard authentication detecting system on plant chimney stalk discharge, including power circuit, laser, optical system
System, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor, LED display module, keyboard and driving electricity
Road, the power circuit, laser, optical system, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor
Device is sequentially connected, and the LED display module, keyboard and drive circuit are connected with microprocessor respectively, the LED display module with
Drive circuit is connected.Laser sends laser, and being irradiated to PSD by optical system (built with reference fluids and testing liquid) feels
In smooth surface, the current signal of output such as is amplified at the treatment by PSD signal modulate circuit, will be simulated by analog to digital conversion circuit
Amount is converted to digital quantity, and microprocessor is sent to by appropriate interface, is that core is controlled to concentration detection system with it,
Testing liquid concentration is shown by display system again.
Further, on the strength of fluid standard authentication detecting system of plant chimney stalk discharge, the PSD signal conditioning electricity
Road uses chip AD538.AD538 unique structures, sophisticated technologies.Low input or output offset voltage and excellent linear properties
With reference to making it to carry out accurate computing in an input dynamic range for non-constant width.
Further, on the strength of fluid standard authentication detecting system of plant chimney stalk discharge, the PSD signal conditioning electricity
Road includes that pre-amplification circuit, ambient interferences and dark current eliminate circuit and trap circuit, and the pre-amplification circuit, background are done
Disturb and dark current eliminates circuit and trap circuit is sequentially connected.In electro-optical system, by photodetector obtain electric signal usually
It is small-signal, it is impossible to be directly sent in microprocessor, it is necessary to be amplified by pre-amplification circuit；Due to being optical system,
It is necessary to eliminate the interference of bias light；Due to the bad environments of system work, the Hz noise of generation can flood PSD
Faint signal, therefore add trap circuit.
Further, on the strength of fluid standard authentication detecting system of plant chimney stalk discharge, the power circuit is used
MC7812。
The present invention compared with prior art, has the following advantages and advantages：Present invention application semiconductor position is quick
Inductor component PSD detects the strength of fluid of plant chimney stalk, and designs peripheral circuit, improves the antijamming capability of detecting system, enters one
Step improves the reliability of detecting system, makes waste discharge up to standard.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is PSD signal modulate circuit of the present invention；
Fig. 3 is the principle explanation figure of pre-amplification circuit of the present invention；
Fig. 4 is that ambient interferences of the present invention and dark current eliminate circuit；
Fig. 5 is trap circuit of the present invention；
Fig. 6 is power circuit of the present invention；
Fig. 7 is level shifting circuit of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As shown in figure 1, on plant chimney stalk discharge strength of fluid standard authentication detecting system, including power circuit, swash
Light device, optical system, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor, LED display module, key
Disk and drive circuit, the power circuit, laser, optical system, PSD sensors, PSD signal modulate circuit, analog-to-digital conversion
Circuit, microprocessor are sequentially connected, and the LED display module, keyboard and drive circuit are connected with microprocessor respectively, described
LED display module is connected with drive circuit.PSD signal modulate circuit uses chip AD538；PSD signal modulate circuit includes preceding
Put amplifying circuit, ambient interferences and dark current and eliminate circuit and trap circuit, the pre-amplification circuit, ambient interferences and dark electricity
Stream eliminates circuit and trap circuit is sequentially connected；Power circuit uses MC7812.
Semiconductor position sensitive device (Position Sensitive Detector abbreviation PSD) is a kind of photosensitive to its
The photoelectric device of the incident light spot position sensitivity on face, i.e., when incident luminous point falls in the diverse location of device photosurface, will be right
Different signals should be exported.By the treatment to output signal, you can it is determined that position of the incident luminous point on device photosurface.
PSD can be divided into one-dimensional PSD and Two-dimensional PSD.The one-dimensional one-dimensional position coordinate that can determine luminous point, and two dimension can detect luminous point
Planar position coordinates.
As shown in Fig. 2 being PSD signal modulate circuit, wherein IC1, IC2, IC3, IC4 are high-operational amplifier, IC1 and IC3
It is pre-amplification circuit, Low Drift Temperature high input impedance amplifier should be selected, IC3 and IC4 forms adder and subtracter respectively,
AD538 is analog divider, depending on resistance R8 can be according to the intensity of incident light.As shown in figure 3, being the principle of pre-amplification circuit
Explanation figure, wherein IC5 on an equal basis with IC1 or IC2, the effect of resistance R12, R14 is similar with the effect of resistance R8.
Generally, always there is the bias light of some strength in PSD when in use, and the presence of bias light will influence the property of device
Energy.Assuming that the photoelectric current that bias light is produced on two signal electrodes is I, it is clear that when background intensity variation, position will be caused
Put the error of output.Also, when background is stronger, the change of signal spot intensity also exports impact position.Therefore, bias light
Use of the presence to PSD be very unfavorable.The method for eliminating bias light influence has two kinds：Optical method and electric method.Optical method
It is the interferometric filter matched with signal optical source plus a piece of transmission wavelength on PSD photosurfaces, filters most bias light.
The size of background light intensity when electric method can first detect that signal optical source extinguishes, then puts bright light source, the output that will be detected
Signal subtracts the composition of bias light.Or output signal can be used by light source with the frequency modulation(PFM) of a certain fixation into pulsed light
Lock-in amplifier synchronizes detection, filters off bias light composition, then is processed, and obtains position output signal.Here light is selected
Method solves bias light and dark current, as shown in figure 4, being that ambient interferences and dark current eliminate circuit.
As shown in figure 5, being trap circuit, active pair of T trap circuit is used in the present embodiment, can effectively filter 50Hz's
Hz noise.As shown in Figure 6 and Figure 7, it is power circuit and level shifting circuit, because the voltage that power circuit is provided has positive and negative
12V and positive and negative 5V, but the voltage of 3.3V is also needed in the present embodiment, therefore added application integration block U5 electrical level transferring chips
The level shifting circuit of LT1085.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (4)
1. on the strength of fluid standard authentication detecting system of plant chimney stalk discharge, it is characterised in that including power circuit, laser
Device, optical system, PSD sensors, PSD signal modulate circuit, analog to digital conversion circuit, microprocessor, LED display module, keyboard
And drive circuit, the power circuit, laser, optical system, PSD sensors, PSD signal modulate circuit, analog-to-digital conversion electricity
Road, microprocessor are sequentially connected, and the LED display module, keyboard and drive circuit are connected with microprocessor respectively, the LED
Display module is connected with drive circuit.
2. the strength of fluid standard authentication detecting system on plant chimney stalk discharge according to claim 1, its feature exists
In the PSD signal modulate circuit uses chip AD538.
3. the strength of fluid standard authentication detecting system on plant chimney stalk discharge according to claim 1, its feature exists
In the PSD signal modulate circuit includes that pre-amplification circuit, ambient interferences and dark current eliminate circuit and trap circuit, institute
State pre-amplification circuit, ambient interferences and dark current elimination circuit and trap circuit is sequentially connected.
4. the strength of fluid standard authentication detecting system on plant chimney stalk discharge according to claim 1, its feature exists
In the power circuit uses MC7812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157362.5A CN106908388A (en) | 2017-03-16 | 2017-03-16 | Strength of fluid standard authentication detecting system on plant chimney stalk discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710157362.5A CN106908388A (en) | 2017-03-16 | 2017-03-16 | Strength of fluid standard authentication detecting system on plant chimney stalk discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106908388A true CN106908388A (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710157362.5A Pending CN106908388A (en) | 2017-03-16 | 2017-03-16 | Strength of fluid standard authentication detecting system on plant chimney stalk discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103289A (en) * | 2018-10-29 | 2020-05-05 | 林修安 | Real-time waste quality detection device and method and waste recycling device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2226299Y (en) * | 1994-11-11 | 1996-05-01 | 潘志文 | On-line measurer for liquid concentration |
| CN1122911A (en) * | 1994-11-11 | 1996-05-22 | 潘志文 | Liquid concentration on-line measuring apparatus |
| CN1130442A (en) * | 1994-03-28 | 1996-09-04 | 精工电子工业株式会社 | Semiconductor device for detecting light and radiation and method of manufacturing the device |
| CN1987416A (en) * | 2006-12-27 | 2007-06-27 | 浙江大学 | Method and device for measuring trace matter in liquid by micro suspension arm sensor |
| CN101216422A (en) * | 2008-01-16 | 2008-07-09 | 中国科学技术大学 | Liquid concentration detection device and detection method |
-
2017
- 2017-03-16 CN CN201710157362.5A patent/CN106908388A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130442A (en) * | 1994-03-28 | 1996-09-04 | 精工电子工业株式会社 | Semiconductor device for detecting light and radiation and method of manufacturing the device |
| CN2226299Y (en) * | 1994-11-11 | 1996-05-01 | 潘志文 | On-line measurer for liquid concentration |
| CN1122911A (en) * | 1994-11-11 | 1996-05-22 | 潘志文 | Liquid concentration on-line measuring apparatus |
| CN1987416A (en) * | 2006-12-27 | 2007-06-27 | 浙江大学 | Method and device for measuring trace matter in liquid by micro suspension arm sensor |
| CN101216422A (en) * | 2008-01-16 | 2008-07-09 | 中国科学技术大学 | Liquid concentration detection device and detection method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103289A (en) * | 2018-10-29 | 2020-05-05 | 林修安 | Real-time waste quality detection device and method and waste recycling device and method |
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Application publication date: 20170630 |
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