CN108007833A - A kind of automatic range dust detector - Google Patents
A kind of automatic range dust detector Download PDFInfo
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- CN108007833A CN108007833A CN201711160905.5A CN201711160905A CN108007833A CN 108007833 A CN108007833 A CN 108007833A CN 201711160905 A CN201711160905 A CN 201711160905A CN 108007833 A CN108007833 A CN 108007833A
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- 239000000428 dust Substances 0.000 title claims abstract description 54
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000012856 packing Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 7
- 101000894525 Homo sapiens Transforming growth factor-beta-induced protein ig-h3 Proteins 0.000 claims description 13
- 102100021398 Transforming growth factor-beta-induced protein ig-h3 Human genes 0.000 claims description 13
- 208000028485 lattice corneal dystrophy type I Diseases 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 6
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 abstract description 5
- 230000001939 inductive effect Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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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
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of automatic range dust detector, including electric charge feeler lever, probing rod joint, signal processing circuit board, shell, the shell sidepiece has been extended wiring hole, outer casing bottom has been extended connecting pole, connecting pole lower end is provided with installation nut, installation nut lower end has been wholely set disk cover board, the disk cover board bottom end face center is extended the threaded post fixed with measurement equipment to be checked, the disk cover board bottom end face outer ring is provided with the elastic packing packing ring being bonded with measurement equipment insert port end face to be checked, electric charge feeler lever is fixedly connected by the probing rod joint at top with the mounting post that screw thread column bottom extends；The signal processing circuit board is installed on enclosure；The present invention can be achieved the gain to signal amplification and continuously adjust, while the relation of charge inducing and dust concentration is calculated by software algorithm, greatly reduces dust accumulation, improves the accuracy and precision of measurement.
Description
Technical field
The present invention relates to a kind of detector, is specifically a kind of automatic range dust detector.
Background technology
In the prior art, the measurement for dust concentration at present mainly uses three kinds of methods：(1) using weight calculation method principle
Filter film type dust sampler (2) uses the dust measurement of electrostatic induction principle using the dust measurement (3) of optical scattering principle
Instrument.
Compared to the Filter film type dust detection device of weight method, for the dust measurement equipment using optical scattering principle
Speech, is that the principle of light generation scattering effect is measured using powder dust particle.Intensity and the dust concentration of light are scattered into certain
Functional relation, the incident light of set light intensity, which is irradiated to after dust laden air, to be produced scattering light and is received by the receiver, and is dissipated by measuring
Dust concentration can be extrapolated by penetrating the light intensity of light.Dust detector using electrostatic induction principle is to pass through feeler lever by detecting dust
How much measurement dust concentrations of charge inducing caused by nearby, size and dust concentration, flow velocity, the space point of charge inducing
Cloth situation etc. is by substantial connection.Since the measuring method of optical scattering principle and electrostatic induction principle is without manual intervention,
It is applicable to the occasion of real-time online measuring；And rule of weighing is measured suitable for laboratory or periodic sampling.
Occasion for needing monitoring dust concentration in real time, generally chooses the dust measurement method of optical scattering principle at present
With the dust measurement method of electrostatic induction principle.And need to measure the internal dust concentration feelings such as ventilation shaft, cleaning shaft, chimney
, may be into barotropic state, if former using optical scattering relative to external environment condition inside pipeline since dust concentration is higher during condition
The dust detector of reason, is likely to result in the serious pollution of optical lens and can not work normally, at this time, electrostatic induction formula dust
Detector has a clear superiority.However, charge inducing number with pipeline section product, feeler lever length, powder dust particle size, dust
Particle flow velocity etc. has functional relation, therefore the dust instrument of the principle of electrostatic induction at present is required to have pin according to Different field situation
Calibration to property, the installation of instrument and maintenance workload are big, and accuracy is affected.
Solve the problems, such as that the dust instrument of electrostatic induction principle disclosure satisfy that different operating modes, Shi Bicong after laboratory investment
Scheme is found on electric charge Acquisition Circuit and software processing algorithm.
The content of the invention
It is proposed in the above background technology to solve it is an object of the invention to provide a kind of automatic range dust detector
Problem.
To achieve the above object, the present invention provides following technical solution：
A kind of automatic range dust detector, including electric charge feeler lever, probing rod joint, signal processing circuit board, shell, it is described
Shell sidepiece has been extended wiring hole, and outer casing bottom has been extended connecting pole, and connecting pole lower end is provided with installation nut, peace
Loading nut lower end has been wholely set disk cover board, and the disk cover board bottom end face center has been extended to be consolidated with measurement equipment to be checked
Fixed threaded post, the disk cover board bottom end face outer ring are provided with the elastic packing being bonded with measurement equipment insert port end face to be checked
Packing ring, electric charge feeler lever are fixedly connected by the probing rod joint at top with the mounting post that screw thread column bottom extends；The signal processing
Circuit board is installed on enclosure, and the electric charge feeler lever includes the Teflon insulation of cladding outside metal feeler lever and metal feeler lever
Set.
Preferred solution as the present invention：The signal processing circuit board includes power supply processing circuit, amplifying circuit, monolithic
Electromechanical road, parametric calibration circuit and man-machine interface circuit, the power supply processing circuit include chip U3, chip U6, chip U4, electricity
Hold C17, capacitance C21 and capacitance C10, amplifying circuit includes chip U1A, chip U1B, chip U5A and field-effect tube Q1, parameter school
Quasi- circuit includes button S1-S4, and single chip circuit includes microcontroller U2 and chip U5A, and man-machine interface circuit includes display screen
The foot 1 of LCD1, the chip U3 connect input voltage VIN, and the foot 3 of chip U3 connects capacitance C21, capacitance C10 and chip U6
Foot 2, the foot 3 of chip U3 go back output voltage+VCC, and the foot 1 of chip U6 connects capacitance C11, the foot 1 of chip U6 go back output voltage-
The foot 3 of VCC, chip U4 connect voltage+VCC and capacitance C9, and the foot 2 of chip U4 goes back output voltage+VDD, the foot of the chip U1A
2 connect resistance R7 and resistance R16 respectively, and the other end of resistance R7 passes through capacitance C1 connecting detection signal Port, the foot of chip U1A
The other end of 1 connection capacitance and resistance R16, the other end of capacitance C2 connect foot 6, the capacitance of chip U1B by resistance R11 respectively
The foot 5 of C18 and resistance R3, chip U1B are grounded by resistance R2, and the foot 7 of chip U1B connects capacitance C3, the other end of capacitance C18
With resistance R4, the drain electrode of the other end connection field-effect tube Q1 of resistance R4, the grid of field-effect tube Q1 connects the foot 1 of chip U5A,
The other end of capacitance C3 passes through the foot 9, resistance R14 and resistance R15 of resistance R15 connection chips U1C, the connection of foot 8 two of chip U1C
The anode of pole pipe D1 and the cathode of diode D2, the anode connection resistance R6 and resistance R15 of diode D2, the other end of resistance R6
Connect foot 13, capacitance C5 and the resistance R9 of chip U1D, the other end of the other end connection resistance R9 of capacitance C5 and chip U1D's
The foot 7 of foot 14 and microcontroller U2, the foot 13-16 of microcontroller U2 pass sequentially through button S1-S4 ground connection, the foot 29 of microcontroller U2 respectively
The foot 18 of display screen LCD1 is connected, the foot 30 of microcontroller U2 connects the foot 19 of display screen LCD1, and the foot 1 and foot 5 of microcontroller U2 is equal
Connect voltage+VDD.
Preferred solution as the present invention：The chip U1A, chip U1B, chip U1C, chip U1D are TLC2274 cores
Amplifier module inside piece, the model LM7805 of the model STM32F051KXUX of microcontroller U2, microcontroller U3, chip
The model position AD8542ARU of the model SP1117 of U4, chip U5A, the model TPS60403 of chip U6, display screen LCD1's
Model CON30.
Compared with prior art, the beneficial effects of the invention are as follows：It is former that automatic range dust instrument of the present invention is based on electrostatic induction
Reason measurement dust concentration is, it can be achieved that the gain to signal amplification continuously adjusts, while calculates sensing by software algorithm
The relation of electric charge and dust concentration.The dust instrument feeler lever employs Teflon insulation sleeve, greatly reduces dust accumulation, improves
The accuracy and precision of measurement.
Brief description of the drawings
Fig. 1 is a kind of automatic range dust instrument structure diagram of the present invention.
Fig. 2 is a kind of circuit diagram of automatic range dust instrument of the present invention.
In figure：1- shells, 2- signal-processing boards, 3- probing rod joints, 4- electric charge feeler levers, 5- wiring holes, 6- connecting poles, 7- peaces
Loading nut, 8- disk cover boards, 9- threaded posts, 10- elastic packing packing rings.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Please refer to Fig.1-2, in the embodiment of the present invention, a kind of automatic range dust detector, including electric charge feeler lever 4, feeler lever
Connector 3, signal processing circuit board 2, shell 1,1 sidepiece of shell have been extended wiring hole 5, and 1 bottom of shell is extended
There is connecting pole 6,6 lower end of connecting pole is provided with installation nut 7, and 7 lower end of installation nut has been wholely set disk cover board 8, the circle
8 bottom end face center of disk cover plate is extended the threaded post 9 fixed with measurement equipment to be checked, 8 bottom end face of disk cover board
Outer ring is provided with the elastic packing packing ring 10 being bonded with measurement equipment insert port end face to be checked, the feeler lever that electric charge feeler lever 4 passes through top
Connector 3 is fixedly connected with the mounting post that 9 bottom of threaded post extends；The signal processing circuit board 2 is installed on inside shell 1, institute
Stating electric charge feeler lever 4 includes the Teflon insulation sleeve of cladding outside metal feeler lever and metal feeler lever.Teflon insulation sleeve is employed,
Dust accumulation is greatly reduced, improves the accuracy and precision of measurement.
Signal processing circuit board includes power supply processing circuit, amplifying circuit, single chip circuit, parametric calibration circuit and man-machine
Interface circuit, the power supply processing circuit include chip U3, chip U6, chip U4, capacitance C17, capacitance C21 and capacitance C10, put
Big circuit includes chip U1A, chip U1B, chip U5A and field-effect tube Q1, and parametric calibration circuit includes button S1-S4, monolithic
Electromechanical road includes microcontroller U2 and chip U5A, and foot 1 of the man-machine interface circuit including display screen LCD1, the chip U3 connects defeated
Enter voltage VIN, the foot 3 of chip U3 connects the foot 2 of capacitance C21, capacitance C10 and chip U6, the foot 3 of chip U3 go back output voltage+
The foot 1 of VCC, chip U6 connect capacitance C11, and the foot 1 of chip U6 goes back output voltage-VCC, and the foot 3 of chip U4 connects voltage+VCC
With capacitance C9, the foot 2 that the foot 2 of chip U4 goes back output voltage+VDD, the chip U1A connects resistance R7 and resistance R16 respectively, electricity
The other end for hindering R7 connects capacitance and the other end of resistance R16 by the foot 1 of capacitance C1 connecting detections signal Port, chip U1A,
The other end of capacitance C2 connects the foot 6, capacitance C18 and resistance R3 of chip U1B by resistance R11 respectively, and the foot 5 of chip U1B is logical
Resistance R2 ground connection is crossed, the foot 7 of chip U1B connects capacitance C3, the other end and resistance R4 of capacitance C18, and the other end of resistance R4 connects
The drain electrode of field-effect tube Q1, the foot 1 of the grid connection chip U5A of field-effect tube Q1 are connect, the other end of capacitance C3 passes through resistance R15
Connect foot 9, resistance R14 and the resistance R15 of chip U1C, the foot 8 of chip U1C connects the anode and diode D2 of diode D1
Cathode, foot 13, the capacitance C5 of the other end connection chip U1D of anode connection the resistance R6 and resistance R15, resistance R6 of diode D2
With resistance R9, the other end and the foot 14 of chip U1D and the foot 7 of microcontroller U2 of the other end connection resistance R9 of capacitance C5, monolithic
The foot 13-16 of machine U2 passes sequentially through button S1-S4 ground connection respectively, and the foot 29 of microcontroller U2 connects the foot 18 of display screen LCD1, single
The foot 30 of piece machine U2 connects the foot 19 of display screen LCD1, and the foot 1 and foot 5 of microcontroller U2 are all connected with voltage+VDD.
Chip U1A, chip U1B, chip U1C, chip U1D are the amplifier module of TLC2274 chip internals, microcontroller
The model SP1117 of the model LM7805 of the model STM32F051KXUX of U2, microcontroller U3, chip U4, chip U5A's
The model CON30 of the model TPS60403 of model position AD8542ARU, chip U6, display screen LCD1.
The present invention operation principle be：As shown in Fig. 2, it is a kind of electricity of the signal-processing board of automatic range dust instrument
Road schematic diagram.The periphery such as U3, U6, U4 and C17 in figure, C21, C10 capacity cell constitutes the power supply processing circuit of complete machine, respectively
Produce the 3.3V voltages needed for the ± 5V voltages and microcontroller needed for amplifier.U1A in figure, U1B, U5A, Q1 and related Resistor-Capacitor Unit
Voltage-controlled continuous variable gain amplifying circuit is constituted, its gain amplifier is determined by the Rds resistance ratios of R4 and Q1, and Q1
Rds resistance sizes by G pole tensions control (DA at), G pole tensions be by microcontroller U2 D/A (digital analog converter) generation and pass through
Amplifier U5A decays on demand, therefore signal gain amplifier can be carried out continuously by microcontroller U2 according to certain algorithm
Control.Alternating voltage caused by exterior charge inducing after the amplification of above-mentioned continuous variable gain amplifying circuit through U1C and U1D and
The absolute value circuit of related Resistor-Capacitor Unit composition carries out shaping amplification, obtains the voltage signal of forward direction, which gives microcontroller
A/D (analog-digital converter) samplings of U2.S1-S4 buttons and LCD1 matrix LCDs constitute parametric calibration and human-machine interface in figure
Mouth circuit, calibration parameter can be shown by key-press input, measured value by liquid crystal display.
U2 is serial 32 microcontrollers of ARM in Fig. 2, which has the higher speed of service and data processing energy
Power.Burning embedded software inside microcontroller.The software has following function：It is first that dust is dense before dust instrument comes into operation
Degree is some segmentations by maximum range cutting, in each segmentation, is demarcated respectively using the dust atmosphere of standard.Minimum
In dust atmosphere in segmentation, microcontroller U2 continuously adjusts the gain of amplifying circuit so that the signal voltage into microcontroller has
There is suitable maximum, at this time the fragment number and signal voltage value of microcontroller record dust concentration.Then next segmentation is carried out
Calibration, the same fragment number and signal voltage value for recording dust concentration, until all segmentation calibration are completed.Put into and survey in dust instrument
During amount, maximum is transferred in the gain of signal amplification circuit first, parameter calculating is carried out with minimum range gear, if in the range
The signal voltage that shelves measure is higher than the signal voltage value of range shelves record, then range is heightened level-one, the increasing of amplifying circuit
Benefit reduces level-one, is sequentially adjusted in, until magnitude of voltage of the surveyed magnitude of voltage less than place range record, at this time with most suitable electricity
Road gain, under the range, reuses relevant parameter, carries out the calculating of dust concentration.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of automatic range dust detector, including electric charge feeler lever, probing rod joint, signal processing circuit board, shell, its feature
It is, the shell sidepiece has been extended wiring hole, and outer casing bottom has been extended connecting pole, and connecting pole lower end is provided with peace
Loading nut, installation nut lower end have been wholely set disk cover board, and the disk cover board bottom end face center has been extended and has treated
The threaded post that detection device is fixed, the disk cover board bottom end face outer ring is provided with to be bonded with measurement equipment insert port end face to be checked
Elastic packing packing ring, electric charge feeler lever is fixedly connected by the probing rod joint at top with the mounting post that screw thread column bottom extends；Institute
State signal processing circuit board and be installed on enclosure, the electric charge feeler lever includes cladding outside metal feeler lever and metal feeler lever
Teflon insulation sleeve.
2. automatic range dust detector according to claim 1, it is characterised in that the signal processing circuit board includes
Power supply processing circuit, amplifying circuit, single chip circuit, parametric calibration circuit and man-machine interface circuit, the power supply processing circuit
Including chip U3, chip U6, chip U4, capacitance C17, capacitance C21 and capacitance C10, amplifying circuit include chip U1A, chip
U1B, chip U5A and field-effect tube Q1, parametric calibration circuit include button S1-S4, and single chip circuit includes microcontroller U2 and core
Piece U5A, the foot 1 that man-machine interface circuit includes display screen LCD1, the chip U3 connect input voltage VIN, and the foot 3 of chip U3 connects
The foot 2 of capacitance C21, capacitance C10 and chip U6 are connect, the foot 3 of chip U3 goes back output voltage+VCC, and the foot 1 of chip U6 connects capacitance
The foot 1 of C11, chip U6 go back output voltage-VCC, and the foot 3 of chip U4 connects voltage+VCC and capacitance C9, and the foot 2 of chip U4 is also defeated
The foot 2 for going out voltage+VDD, the chip U1A connects resistance R7 and resistance R16 respectively, and the other end of resistance R7 is connected by capacitance C1
The foot 1 for meeting detection signal Port, chip U1A connects capacitance and the other end of resistance R16, and the other end of capacitance C2 passes through resistance
R11 connects the foot 6, capacitance C18 and resistance R3 of chip U1B respectively, and the foot 5 of chip U1B is grounded by resistance R2, chip U1B's
Foot 7 connects capacitance C3, the other end and resistance R4 of capacitance C18, the drain electrode of the other end connection field-effect tube Q1 of resistance R4, field effect
Should pipe Q1 grid connection chip U5A foot 1, foot 9, the resistance that the other end of capacitance C3 passes through resistance R15 connection chips U1C
The foot 8 of R14 and resistance R15, chip U1C connect the anode of diode D1 and the cathode of diode D2, and the anode of diode D2 connects
Foot 13, capacitance C5 and the resistance R9 of the other end connection chip U1D of connecting resistance R6 and resistance R15, resistance R6, capacitance C5's is another
The other end and the foot 14 of chip U1D and the foot 7 of microcontroller U2 of end connection resistance R9, the foot 13-16 difference of microcontroller U2 is successively
It is grounded by button S1-S4, the foot 29 of microcontroller U2 connects the foot 18 of display screen LCD1, and the foot 30 of microcontroller U2 connects display screen
The foot 19 of LCD1, the foot 1 and foot 5 of microcontroller U2 are all connected with voltage+VDD.
3. automatic range dust detector according to claim 1, it is characterised in that the chip U1A, chip U1B, core
Piece U1C, chip U1D are the amplifier module of TLC2274 chip internals, and the model STM32F051KXUX of microcontroller U2 is single
The model position AD8542ARU of the model SP1117 of the model LM7805 of piece machine U3, chip U4, chip U5A, the type of chip U6
Number it is TPS60403, the model CON30 of display screen LCD1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160905.5A CN108007833A (en) | 2017-11-20 | 2017-11-20 | A kind of automatic range dust detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711160905.5A CN108007833A (en) | 2017-11-20 | 2017-11-20 | A kind of automatic range dust detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116046623A (en) * | 2023-03-31 | 2023-05-02 | 山东正润环境检测技术服务有限公司 | Air dust detection device for factory building |
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Application publication date: 20180508 |