CN104597131B - A kind of urban catering cooking fume probe - Google Patents
A kind of urban catering cooking fume probe Download PDFInfo
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- CN104597131B CN104597131B CN201410765427.0A CN201410765427A CN104597131B CN 104597131 B CN104597131 B CN 104597131B CN 201410765427 A CN201410765427 A CN 201410765427A CN 104597131 B CN104597131 B CN 104597131B
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Abstract
The invention discloses a kind of urban catering cooking fume probe, including wire, fixed disk, strong magnets, monitoring device, ultrasonic reflections baffle plate and circuit board, strong magnets are uniformly arranged on fixed disk, monitoring device is arranged on fixed disk by Al-alloy casing, monitoring device includes ultrasonic transducer and sensor, sensor includes temperature sensor and pressure sensor, temperature sensor and pressure sensor are arranged on the both sides of ultrasonic transducer, and ultrasonic wave transmitting baffle plate is arranged on Al-alloy casing top by launching barrier support.Easy for installation, simple structure of the invention, using only a ultrasonic transducer, both flow velocity was measured by detecting frequency shift signal, concentration is measured further through detection sound intensity decay, average power consumption is not more than 10mW, made condition for the long-distance transmissions of monitoring signals, realize oil smoke concentration in urban catering enterprise oil smoke discharge flue, flow velocity monitoring and converse oil smoke discharge amount.
Description
Technical field
The present invention relates to oil smoke monitoring field, specifically a kind of urban catering cooking fume probe.
Background technology
Oil smoke of catering industry waste gas is as one of important root of each urban air pollution, such as PM2.5, State Ministry of Environmental Protection's pin
A series of relevant policies have been put into effect to oil smoke of catering industry pollution problem, and have required each provinces, municipalities and autonomous regions in the whole nation, municipality directly under the Central Government's environment
Fume pollution problem is included in home management work scope by protection office and Bureau for Environmental Protection of environmental protection key cities.Strictly
Forbid the uncontrollable discharge in fume pollution source, no ventilation equipment and purifier want solar obligation ventilation equipment and purification to fill
Put；Discharge standard will meet《Cooking fume discharge standard (tentative)》(GB18483-2001), maximum allowable concentration of emission is not
2.0mg/m must be exceeded3；Also, environmental protection examination ＆ approval are out eating and drinking establishment's license indispensable step during handling.
At present, the environmental monitoring in all parts of the country to kitchen fumes pollution, most people rest on manual monitoring stage, time
Coverage rate is low, and monitoring range is limited, it is difficult to reflects city environmental pollution consecutive variations situation in large area, it is also difficult to reaches real
When monitoring, in real time exceeded alarm, unattended requirement, it is and time-consuming, had a strong impact on environmental administration work efficiency and
Quick reflection ability.Simultaneously as supervision is not in place, and cause fume purifier of fume to perform practically no function, or even be fitted without at all
The phenomenon of fume purifier of fume, it has also become the important cause of fume pollution problem.
Urban catering oil smoke online monitoring system is to coordinate country to research and develop the related monitoring policy of kitchen fumes
Oil smoke network monitoring system for things of new generation, urban catering oil smoke on-line monitoring instrument are important perception indispensable in system and biography
Transfer device.Kitchen fumes concentration monitor product in the market, is monitored, the longevity using semiconductor transducer mostly
Short, low precision is ordered, and because the covering and pollution by oil content, maintenance are very big.
The content of the invention
It is an object of the invention to provide a kind of saving cost, urban catering cooking fume easy for installation probe, with solution
The problem of being proposed in certainly above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of urban catering cooking fume probe, including wire, fixed disk, strong magnets, monitoring device, ultrasonic reflections
Baffle plate and circuit board, strong magnets are uniformly arranged on fixed disk, and the monitoring device is arranged on by Al-alloy casing and fixed
On disk, the monitoring device includes ultrasonic transducer and sensor, and the sensor includes temperature sensor and pressure sensing
Device, temperature sensor and pressure sensor are arranged on the both sides of ultrasonic transducer, and the ultrasonic wave transmitting baffle plate passes through transmitting
Barrier support is arranged on Al-alloy casing top, and the circuit board is arranged on inside fixed disk, and the wire is arranged on fixed disk
Bottom and wire be connected with circuit board；
Circuit in the circuit board includes ultrasonic transceiver circuit, temperature sensor receiving circuit, pressure sensor and connect
Receive circuit, MCU digital signal processing circuits and the telecommunication circuit with main frame；The temperature sensor and pressure sensor collection
Signal by preposition amplification, MCU digital signal processing circuits are connected after filter and amplification, the ultrasonic transceiver circuit includes
Ultrasonic output circuit, ultrasonic wave sound intensity signal acquisition circuit and ultrasonic wave Doppler frequency-shift signal acquisition circuit, the ultrasound
The strong signal acquisition circuit of wave sound includes frequency selection circuit, second-order filter circuit, logarithmic amplifying circuit and amplification and rectification circuit, described super
Sound wave Doppler frequency-shift signal acquisition circuit includes mixting circuit and amplification adjustment circuit；
Ultrasonic wave occurs signal and passes through resistance R19 connection FETs M2 grid, field in the ultrasonic output circuit
Effect pipe M2 source ground, FET M2 drain electrode connection transformer T1 primary coil, the transformer T1 primary lines
The other end of circle connects resistance R24, resistance R21 and electric capacity C11 respectively, and the resistance R24 other ends connect 12V voltage signals,
It is grounded after the resistance R21 other ends and electric capacity the C11 other end parallel connections, the secondary coil of the transformer T1 connects resistance respectively
R22 and sensor LS1, the other end of the transformer T1 secondary coils connect diode D3 and diode D4, diode respectively
The D3 other ends connect the diode D4 other ends, the sensor LS1 other ends, the resistance R22 other ends and ultrasonic echo signal respectively；
Ultrasonic echo signal passes sequentially through resistance R43 in the frequency selection circuit and electric capacity C1 connects electric capacity C12, two respectively
Pole pipe D5 and diode D6, is grounded, the electric capacity C12 is another after the diode D5 other ends and diode the D6 other end parallel connections
End connects resistance R29 and triode Q2 base stage by resistance R28 respectively, and the emitter stage of the triode Q2 passes through resistance R44
Ground connection, triode Q2 colelctor electrode connect the resistance R29 other ends, resistance R30 and electric capacity C13, the electric capacity C13 other ends respectively
Signal after frequency-selecting is handled is exported by resistance R32；
Signal connects electric capacity C19, electric capacity C20 and resistance R33 respectively after frequency-selecting processing in the second-order filter circuit, described
The resistance R33 other ends are grounded, and the electric capacity C19 other ends connect resistance R41 and operational amplifier U1B 6 pin respectively, and the computing is put
Big device U1B 5 pin connect resistance R39, electric capacity C25, resistance R36 and operational amplifier U1A 3 pin, the resistance R39 other ends respectively
It is grounded with after electric capacity C25 other end parallel connections, the resistance R36 other ends and operational amplifier U1A 8 pin are all connected with VCC voltage signals,
7 pin of the operational amplifier U1B connect the electric capacity C20 other ends, the resistance R41 other ends and resistance R37, the resistance respectively
The R37 other ends connect electric capacity C21, electric capacity C22 and resistance R35, the resistance R35 other ends ground connection, electricity by resistance R34 respectively
Hold 2 pin that the C21 other ends connect resistance R42 and operational amplifier U1A respectively, 1 pin of the operational amplifier U1A connects respectively
The electric capacity C22 other ends, the resistance R42 other ends and electric capacity C14, electric capacity C14 other ends output filtered signal；
Filtered signal connects resistance R47 respectively in the logarithmic amplifying circuit and electric capacity C29, the resistance R47 is another
End connects electric capacity C27, electric capacity C28 and A/D converter J7 2 pin, the electric capacity C29 other ends connection A/D converter J7 respectively
8 pin, electric capacity C28 other ends connection A/D converter J7 3 pin, the electric capacity C27 other ends connection A/D converter J7
1 pin, A/D converter J7 7 pin are by resistance R20 connection VCC voltage signals, A/D converter J7 6 pin connection electric capacity C16,
A/D converter J7 5 pin connection electric capacity C18, is grounded, A/D converter after the electric capacity C16 other ends and electric capacity C18 other end parallel connections
J7 4 pin pass sequentially through signal after electric capacity C26 and resistance R46 output logarithmic amplifications；
Signal connects electric capacity C24 and operational amplifier U4A 3 pin respectively after logarithmic amplification in the amplification and rectification circuit,
The electric capacity C24 other ends and operational amplifier U4A 4 pin are grounded, operational amplifier U4A 8 pin connection VCC voltage signals, fortune
1 pin and resistance R40, the resistance R40 other ends for calculating amplifier U4A 2 pin difference concatenation operation amplifier U4A connect respectively
Resistance R23 and operational amplifier U4B 5 pin, resistance R23 other ends ground connection, operational amplifier U4B 6 pin connect resistance respectively
R38, electric capacity C23 and resistance R45, the resistance R45 other ends are grounded, after the resistance R38 other ends and electric capacity C23 other end parallel connections
Concatenation operation amplifier U4B 7 pin and resistance R31, the resistance R31 are connected and are mended electric capacity C15 and export amplification shaping respectively
Signal afterwards；
Ultrasonic echo signal connects resistance R29, resistance R36 and chip respectively by electric capacity C23 in the mixting circuit
N2 1 pin, resistance R36 other ends ground connection, the resistance R29 other ends pass sequentially through slide rheostat R49 and resistance R30 difference
Resistance R41 and chip N2 4 pin are connected, the resistance R41 other ends connect resistance R50 and are grounded, the connection of the resistance R50 other ends
Chip N2 5 pin, the 14 pin connection -12V voltage signals of the chip N2,12 pin of the chip N2 connect respectively inductance L6,
Electric capacity C29 and resistance R40, the electric capacity C29 other ends ground connection, the inductance L6 other ends connect inductance L5, electric capacity C30 and electricity respectively
R38 is hindered, the inductance L5 other ends connect 6 pin and resistance R39 of the chip N2, the electric capacity C30 other ends ground connection, resistance respectively
The R38 other ends connect resistance R37, electric capacity C27, resistance R35 and chip N2 8 pin, the resistance R37 other ends and electric capacity respectively
It is grounded after C27 other end parallel connections, the resistance R35 other ends connect electric capacity C26 and chip N2 10 pin respectively, and electric capacity C26 is another
One end exports reference signal, is connected after the resistance R39 other ends and resistance the R40 other end parallel connections and mends electric capacity C35 and export
Mixed signal；
Mixed signal connects resistance R28 respectively in the amplification adjustment circuit and electric capacity C15, the resistance R28 is another
End connects electric capacity C20 and operational amplifier U1C 10 pin respectively, and the electric capacity C20 other ends connect resistance R32 and resistance respectively
R33, resistance R32 other end concatenation operation amplifiers U1C 9 pin, the resistance R33 other ends connect the electric capacity C15 other ends, electricity respectively
Hold C25 and operational amplifier U1C 8 pin, electric capacity C25 other end concatenation operation amplifiers U1D 12 pin, operational amplifier U1D
13 pin connect resistance R58 and resistance R53 respectively, the resistance R53 other ends connect electric capacity C33 and electric capacity C34, electric capacity C33 respectively
The other end exports amplification adjustment after connecting the resistance C58 other ends, the electric capacity C34 other ends and operational amplifier U1D 14 pin respectively
Signal afterwards.
As the further scheme of the present invention：The strong magnets have three.
As the further scheme of the present invention：The temperature sensor is platinum resistance temperature sensor, the pressure sensing
Device is ceramic pressure sensor.
As further scheme of the invention：The material of ultrasonic transducer is piezoelectric ceramics, ultrasonic transducer
Wafer diameter is Φ 20mm.
Compared with prior art, the beneficial effects of the invention are as follows：
Easy for installation, simple structure of the invention, using only a ultrasonic transducer, both measured by detecting frequency shift signal
Flow velocity, concentration is measured further through detection sound intensity decay, average power consumption is not more than 10mW, is made for the long-distance transmissions of monitoring signals
Condition, realize oil smoke concentration in urban catering enterprise oil smoke discharge flue, flow velocity monitoring and converse oil smoke discharge amount.
Brief description of the drawings
Fig. 1 is the front view of the present invention.
Fig. 2 is the top view of the present invention.
Fig. 3 is the electrical block diagram of the present invention.
Fig. 4 is ultrasonic output circuit connection figure in the present invention.
Fig. 5 is frequency selection circuit connection figure in the present invention.
Fig. 6 is second-order filter circuit connection figure in the present invention.
Fig. 7 is logarithmic amplifying circuit connection figure in the present invention.
Fig. 8 is amplification and rectification circuit connection figure in the present invention.
Fig. 9 is mixting circuit connection figure in the present invention.
Figure 10 is amplification adjustment circuit connection figure in the present invention.
Figure 11 is soot particles flow velocity measuring principle schematic diagram in the present invention.
Figure 12 propagates schematic diagram for ultrasonic wave in the present invention in flue.
In figure：1- wires；2- fixed disks；3- strong magnets；4- Al-alloy casings；5- reflecting curtain supports；6- monitoring dresses
Put；7- ultrasonic reflections baffle plates；8- circuit boards；9- temperature sensors；10- ultrasonic transducers；11- pressure sensors.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Refer to Fig. 1-2, a kind of urban catering cooking fume probe, including wire 1, fixed disk 2, strong magnets 3, monitoring
Device 6, ultrasonic reflections baffle plate 7 and circuit board 8, the strong magnets 3 have three, and strong magnets 3 are uniformly arranged on fixed disk 2
On, the monitoring device 6 is arranged on fixed disk 2 by Al-alloy casing 4, and the monitoring device 6 includes ultrasonic transducer
10 and sensor, the sensor includes temperature sensor 9 and pressure sensor 11, to compensate the temperature of ultrasonic transducer 10
Float to calculate concentration and discharge capacity；Temperature sensor 9 and pressure sensor 11 are arranged on the both sides of ultrasonic transducer 10, temperature
Sensor 9 is platinum resistance temperature sensor, and pressure sensor 11 is ceramic pressure sensor.The ultrasonic wave transmitting baffle plate 7 is logical
Cross transmitting barrier support 5 and be arranged on the top of Al-alloy casing 4, the circuit board 8 is arranged on inside fixed disk 2, and the wire 1 is pacified
It is connected mounted in the bottom of fixed disk 2 and wire 1 with circuit board 8.
The ultrasonic wave transmitting and reception are realized by ultrasonic transducer 10, are reduced transmitting-receiving to greatest extent and are changed
Can device it is inconsistent and caused by influence, the reference frequency and reference frequency of ultrasonic transducer 10 are unified to be produced, and eliminates frequency
The inconsistent and caused error of generator.The material of ultrasonic transducer 10 is piezoelectric ceramics, there is that piezoelectric property is good, production and machine
The advantages that tool is easy to process；The working frequency of ultrasonic transducer 10 obtains by many experiments, and the noise in flue is to probe
Very little is influenceed, sensitivity and resolving power are high, and directive property is good；During the wafer diameter increase of ultrasonic transducer 10, acoustic beam directive property
Improve, acoustic energy is concentrated, but the acoustic energy radiated is big, and diffusion region scanning scope is big, and remote scanning scope is relative to diminish, therefore ultrasound
The wafer diameter of wave transducer 10 elects Φ 20mm as.
Referring to Fig. 3, the circuit in the circuit board 8 includes ultrasonic transceiver circuit, temperature sensor receiving circuit, pressure
Force snesor receiving circuit, MCU digital signal processing circuits and the telecommunication circuit with main frame；The temperature sensor and pressure
The signal of sensor collection connects MCU digital signal processing circuits after preposition amplification, filter and amplification, and the ultrasonic wave is received
Power Generation Road includes ultrasonic output circuit, ultrasonic wave sound intensity signal acquisition circuit and ultrasonic wave Doppler frequency-shift signal acquisition electricity
Road, the ultrasonic wave sound intensity signal acquisition circuit include frequency selection circuit, second-order filter circuit, logarithmic amplifying circuit and amplification shaping
Circuit, the ultrasonic wave Doppler frequency-shift signal acquisition circuit include mixting circuit and amplification adjustment circuit.
Ultrasonic transducer 10 first sends series of ultrasound ripple and is used to clean probe before measurements, launches ultrasonic wave
When, a string of fixed frequency signals are sent, amplified excitation ultrasonic transducer 10, Δ T time is then waited, it is dry to eliminate transmitting
Disturb, Δ T is less than echo arrival time, when ultrasonic transducer 10 receives ultrasonic signal, is carried out respectively after preliminary amplification more
Spectrum strangles frequency shift signal detection and the detection of the ultrasonic wave sound intensity.The A/D converter for being finally then sent through MCU digital signal processing circuits is carried out
Analog-to-digital conversion, concentration, flow velocity, flow, temperature and pressure are exported to main frame by the telecommunication circuit of same main frame after software analysis
Deng processing analysis result.
Referring to Fig. 4, ultrasonic wave generation signal passes through resistance R19 connection FETs M2 in the ultrasonic output circuit
Grid, FET M2 source ground, FET M2 drain electrode connection transformer T1 primary coil, the transformer
The other end of T1 primary coils connects resistance R24, resistance R21 and electric capacity C11, the resistance R24 other ends connection 12V electricity respectively
Signal is pressed, is grounded after the resistance R21 other ends and electric capacity the C11 other end parallel connections, the secondary coil difference of the transformer T1
Connection resistance R22 and sensor LS1, the other end of the transformer T1 secondary coils connect diode D3 and diode respectively
D4, diode the D3 other end connect the diode D4 other ends, the sensor LS1 other ends, the resistance R22 other ends and ultrasonic wave respectively
Echo-signal.
Referring to Fig. 5, ultrasonic echo signal passes sequentially through resistance R43 in the frequency selection circuit and electric capacity C1 is connected respectively
Electric capacity C12, diode D5 and diode D6, are grounded after the diode D5 other ends and diode the D6 other end parallel connections, described
The electric capacity C12 other ends connect resistance R29 and triode Q2 base stage, the emitter stage of the triode Q2 by resistance R28 respectively
It is grounded by resistance R44, triode Q2 colelctor electrode connects the resistance R29 other ends, resistance R30 and electric capacity C13, the electricity respectively
Hold the C13 other ends and signal after frequency-selecting is handled is exported by resistance R32.
Referring to Fig. 6, signal connects electric capacity C19, electric capacity C20 and electricity respectively after frequency-selecting processing in the second-order filter circuit
R33, the resistance R33 other ends ground connection are hindered, the electric capacity C19 other ends connect resistance R41 and operational amplifier U1B 6 pin respectively,
5 pin of the operational amplifier U1B connect resistance R39, electric capacity C25, resistance R36 and operational amplifier U1A 3 pin respectively, electricity
It is grounded after the resistance R39 other ends and electric capacity C25 other end parallel connections, the resistance R36 other ends and operational amplifier U1A 8 pin are all connected with
VCC voltage signals, 7 pin of the operational amplifier U1B connect the electric capacity C20 other ends, the resistance R41 other ends and resistance respectively
R37, the resistance R37 other ends connect electric capacity C21, electric capacity C22 and resistance R35, the resistance R35 by resistance R34 respectively
The other end is grounded, and the electric capacity C21 other ends connect resistance R42 and operational amplifier U1A 2 pin, the operational amplifier U1A respectively
1 pin connect the electric capacity C22 other ends, the resistance R42 other ends and electric capacity C14 respectively, believe after the output filtering of the electric capacity C14 other ends
Number.Wherein：
Second order bandpass filtering centre frequency F0：
Second order bandpass filtering quality factor FQ0：
Second order bandpass filtering centre frequency F1：
Second order bandpass filtering quality factor FQ1：
Referring to Fig. 7, filtered signal connects resistance R47 and electric capacity C29, the electricity respectively in the logarithmic amplifying circuit
The resistance R47 other ends connect electric capacity C27, electric capacity C28 and A/D converter J7 2 pin respectively, and the electric capacity C29 other ends connect A/D
Converter J7 8 pin, 3 pin of the electric capacity C28 other ends connection A/D converter J7, the electric capacity C27 other ends connect A/D
Converter J7 1 pin, A/D converter J7 7 pin are connected by resistance R20 connection VCC voltage signals, A/D converter J7 6 pin
Electric capacity C16, A/D converter J7 5 pin connection electric capacity C18, are grounded, A/ after the electric capacity C16 other ends and electric capacity C18 other end parallel connections
D converters J7 4 pin pass sequentially through signal after electric capacity C26 and resistance R46 output logarithmic amplifications.Wherein：
Output signal V after output logarithmic amplificationOUT：
VOUT=VYlog(VIN/VX) formula 5
In formula：Vin is input signal, VYFor ramp voltage, VXTo block voltage.
Referring to Fig. 8, signal connects electric capacity C24 and operational amplifier respectively after logarithmic amplification in the amplification and rectification circuit
U4A 3 pin, the electric capacity C24 other ends and operational amplifier U4A 4 pin are grounded, operational amplifier U4A 8 pin connection VCC electricity
Pressure signal, operational amplifier U4A 2 pin difference concatenation operation amplifier U4A 1 pin and resistance R40, the resistance R40 are another
End connects resistance R23 and operational amplifier U4B 5 pin, resistance R23 other ends ground connection, operational amplifier U4B 6 pin point respectively
Not Lian Jie resistance R38, electric capacity C23 and resistance R45, the resistance R45 other ends ground connection, the resistance R38 other ends and electric capacity C23 are another
Distinguish concatenation operation amplifier U4B 7 pin and resistance R31 after the parallel connection of one end, the resistance R31 is connected and mended electric capacity C15 and defeated
Go out to amplify signal after shaping.Wherein：
Output voltage V after operational amplifier U4A adjustmentOUT：
In formula：F0 is lowAdjust the cut-off frequency of voltage LPF.
Referring to Fig. 9, ultrasonic echo signal connects resistance R29, resistance respectively by electric capacity C23 in the mixting circuit
R36 and chip N2 1 pin, resistance R36 other ends ground connection, the resistance R29 other ends pass sequentially through slide rheostat R49 and electricity
Resistance R30 connects resistance R41 and chip N2 4 pin respectively, and the resistance R41 other ends connect resistance R50 and are grounded, resistance R50
Other end connection chip N2 5 pin, the 14 pin connection -12V voltage signals of the chip N2,12 pin of the chip N2 connect respectively
Inductance L6, electric capacity C29 and resistance R40, the electric capacity C29 other ends ground connection are met, the inductance L6 other ends connect inductance L5, electricity respectively
Hold C30 and resistance R38, the inductance L5 other ends connect 6 pin and resistance R39 of the chip N2, the electric capacity C30 other ends respectively
Ground connection, the resistance R38 other ends connect resistance R37, electric capacity C27, resistance R35 and chip N2 8 pin respectively, and the resistance R37 is another
It is grounded after one end and electric capacity C27 other end parallel connections, the resistance R35 other ends connect electric capacity C26 and chip N2 10 pin respectively,
The electric capacity C26 other ends export reference signal, are connected after the resistance R39 other ends and resistance the R40 other end parallel connections and mend electric capacity
C35 simultaneously exports mixed signal.Wherein：
Input signal prime frequency filtering F0：
With reference to prime frequency filtering FGinseng：
Mixing output forward signal frequency FJust：
Mixing output forward signal frequency FIt is negative：
Referring to Fig. 10, mixed signal connects resistance R28 and electric capacity C15 respectively in the amplification adjustment circuit, it is described
The resistance R28 other ends connect electric capacity C20 and operational amplifier U1C 10 pin respectively, and the electric capacity C20 other ends connect electricity respectively
R32 and resistance R33, resistance R32 other end concatenation operation amplifiers U1C 9 pin are hindered, the resistance R33 other ends connect electric capacity respectively
8 pin of the C15 other ends, electric capacity C25 and operational amplifier U1C, electric capacity C25 other end concatenation operation amplifiers U1D 12 pin, fortune
13 pin for calculating amplifier U1D connect resistance R58 and resistance R53 respectively, and the resistance R53 other ends connect electric capacity C33 and electric capacity respectively
C34, electric capacity the C33 other end connect defeated after the resistance C58 other ends, the electric capacity C34 other ends and operational amplifier U1D 14 pin respectively
Go out signal after amplification adjusts.Wherein：
The signal output voltage Vout after operational amplifier U1D adjustment：
In formula：Vin is mixer output signal voltage, F0For output signal LPF cut-off frequency.
Figure 11-12 are referred to, the urban catering cooking fume probe measurement principle is as follows：
(1) the flow velocity measuring principle of Doppler frequency shift technology：
Refer to Figure 11, the particle in fluid makes ultrasonic signal produce frequency shift (FS), the flow velocity of frequency shift (FS) and particle into
Proportionate relationship, by the flow velocity of measurement frequency offset measurement fluid, temperature is influenceed to compensate using temperature sensor.According to
Flue cross section can calculate smoke discharge amount, measure pressure in flue using pressure sensor, can be converted under normality
Smoke discharge amount；
Soot particles flow velocity V calculation formula is as follows：
V=K* (f2-f1) formula 14
Wherein, K is correction coefficient, the soot particles flow velocity V positive and negative flow direction for reflecting soot particles.
(2) ultrasonic measurement oil smoke concentration principle：
Figure 12 is referred to, when ultrasonic wave transmits in oil smoke, an energy is fallen in smoke particle scattering, and this portion of energy is the same as oil
Smoke density is directly proportional.By detecting the remaining energy of ultrasonic beam, then convert while consider temperature-compensating, just obtain oil
The concentration of cigarette.
C=K* (I0-I)/f(T-T0) formula 15
Wherein, C is oil smoke concentration；I0For the sound intensity received under standard state；I is the sound received under working condition
By force；T is the soot gas temperature under working condition；T0For air themperature under standard state；f(T-T0) it is on temperature change
Empirical function.
The ultrasonic transducer integrates 10 and received and dispatched, and launches a branch of ultrasonic wave by specific frequency, successively after reflection
Frequency shift signal and sound intensity signal are taken out by frequency selection circuit, second-order filter circuit and logarithmic amplifying circuit, utilizes discrete Fourier
The discrete spectrum of signal is sought in conversion, and then obtains discrete power spectrum, is obtained further according to discrete statistics integration accurately more
General Le difference frequency signal；For sound intensity signal then by first differential, the mode integrated afterwards removes background value, while is obtained by temperature-compensating
Accurate oil smoke concentration C, the pressure cooperation that soot particles flow velocity V and pressure sensor that Doppler transducer 10 is measured are measured
Oil smoke flow in flue is calculated, then is multiplied with the oil smoke concentration of measurement, just obtains oil smoke discharge amount.
When the present invention installs again, the first proper site perforate on flue, probe vertical is inserted into flue, and ultrasonic wave transducer
Detect tank between device 10 and ultrasonic reflections baffle plate 7 flows to parallel with oil smoke, makes the sound wave direction of Doppler transducer 10 same
Oil smoke flows in 90 ° in flue, prevent to some extent debris covering, also eliminates and is vortexed caused by probe itself simultaneously
Measurement on ultrasonic transducer 10 influences, so as to avoid the oil smoke change in flow caused by structure.
Easy for installation, simple structure of the invention, using only a ultrasonic transducer 10, both surveyed by detecting frequency shift signal
Flow velocity is measured, concentration is measured further through detection sound intensity decay, average power consumption is not more than 10mW, is the long-distance transmissions of monitoring signals
Made condition, realize oil smoke concentration in urban catering enterprise oil smoke discharge flue, flow velocity monitoring and converse oil smoke discharge
Amount.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge
Various changes can be made.
Claims (4)
1. a kind of urban catering cooking fume probe, including wire (1), fixed disk (2), strong magnets (3), monitoring device (6),
Ultrasonic reflections baffle plate (7) and circuit board (8), the monitoring device (6) includes ultrasonic transducer (10) and sensor, described
Sensor includes temperature sensor (9) and pressure sensor (11), it is characterised in that strong magnets (3) are uniformly arranged on and fixed
On disk (2), the monitoring device (6) is arranged on fixed disk (2) by Al-alloy casing (4), temperature sensor (9) and pressure
Sensor (11) is arranged on the both sides of ultrasonic transducer (10), and the ultrasonic wave transmitting baffle plate (7) is by launching barrier support
(5) Al-alloy casing (4) top is arranged on, the circuit board (8) is arranged on fixed disk (2) inside, and the wire (1) is arranged on
The bottom of fixed disk (2) and wire (1) is connected with circuit board (8)；
Circuit in the circuit board (8) includes ultrasonic transceiver circuit, temperature sensor receiving circuit, pressure sensor and received
Circuit, MCU digital signal processing circuits and the telecommunication circuit with main frame；The temperature sensor and pressure sensor collection
Signal connects MCU digital signal processing circuits after preposition amplification, filter and amplification, and the ultrasonic transceiver circuit includes super
Sound wave generation circuit, ultrasonic wave sound intensity signal acquisition circuit and ultrasonic wave Doppler frequency-shift signal acquisition circuit, the ultrasonic wave
Sound intensity signal acquisition circuit includes frequency selection circuit, second-order filter circuit, logarithmic amplifying circuit and amplification and rectification circuit, the ultrasound
Ripple Doppler frequency-shift signal acquisition circuit includes mixting circuit and amplification adjustment circuit；
Ultrasonic wave occurs signal and passes through resistance R19 connection FETs M2 grid, field-effect in the ultrasonic output circuit
Pipe M2 source ground, FET M2 drain electrode connection transformer T1 primary coil, the transformer T1 primary coils
The other end connects resistance R24, resistance R21 and electric capacity C11 respectively, and the resistance R24 other ends connect 12V voltage signals, described
It is grounded after the resistance R21 other ends and electric capacity C11 other end parallel connections, the secondary coil of the transformer T1 connects resistance R22 respectively
With sensor LS1, the other end of the transformer T1 secondary coils connects diode D3 and diode D4 respectively, and diode D3 is another
One end connects the diode D4 other ends, the sensor LS1 other ends, the resistance R22 other ends and ultrasonic echo signal respectively；
Ultrasonic echo signal passes sequentially through resistance R43 in the frequency selection circuit and electric capacity C1 connects electric capacity C12, diode respectively
D5 and diode D6, is grounded, the electric capacity C12 other ends lead to after the diode D5 other ends and diode the D6 other end parallel connections
The base stage that resistance R28 connects resistance R29 and triode Q2 respectively is crossed, the emitter stage of the triode Q2 is grounded by resistance R44,
Triode Q2 colelctor electrode connects the resistance R29 other ends, resistance R30 and electric capacity C13, the electric capacity C13 other ends and passed through respectively
Signal after resistance R32 output frequency-selecting processing；
Signal connects electric capacity C19, electric capacity C20 and resistance R33, the resistance respectively after frequency-selecting processing in the second-order filter circuit
The R33 other ends are grounded, and the electric capacity C19 other ends connect resistance R41 and operational amplifier U1B 6 pin, the operational amplifier respectively
U1B 5 pin connect resistance R39, electric capacity C25, resistance R36 and operational amplifier U1A 3 pin, the resistance R39 other ends and electricity respectively
It is grounded after holding C25 other end parallel connections, the resistance R36 other ends and operational amplifier U1A 8 pin are all connected with VCC voltage signals, described
It is another that operational amplifier U1B 7 pin connect the electric capacity C20 other ends, the resistance R41 other ends and resistance R37, the resistance R37 respectively
One end connects electric capacity C21, electric capacity C22 and resistance R35, the resistance R35 other ends ground connection, electric capacity C21 by resistance R34 respectively
The other end connects resistance R42 and operational amplifier U1A 2 pin respectively, and 1 pin of the operational amplifier U1A connects electric capacity respectively
The C22 other ends, the resistance R42 other ends and electric capacity C14, electric capacity C14 other ends output filtered signal；
Filtered signal connects resistance R47 and electric capacity C29, the resistance R47 other ends point respectively in the logarithmic amplifying circuit
Not Lian Jie electric capacity C27, electric capacity C28 and A/D converter J7 2 pin, the 8 of the electric capacity C29 other ends connection A/D converter J7
Pin, 3 pin of the electric capacity C28 other ends connection A/D converter J7, the 1 of the electric capacity C27 other ends connection A/D converter J7
Pin, A/D converter J7 7 pin pass through resistance R20 connection VCC voltage signals, A/D converter J7 6 pin connection electric capacity C16, A/D
Converter J7 5 pin connection electric capacity C18, is grounded after the electric capacity C16 other ends and electric capacity C18 other end parallel connections, A/D converter J7's
4 pin pass sequentially through signal after electric capacity C26 and resistance R46 output logarithmic amplifications；
Signal connects electric capacity C24 and operational amplifier U4A 3 pin, electric capacity respectively after logarithmic amplification in the amplification and rectification circuit
The C24 other ends and operational amplifier U4A 4 pin are grounded, and operational amplifier U4A 8 pin connection VCC voltage signals, computing is put
Big device U4A 2 pin difference concatenation operation amplifier U4A 1 pin and resistance R40, the resistance R40 other ends connects resistance respectively
R23 and operational amplifier U4B 5 pin, resistance R23 other ends ground connection, operational amplifier U4B 6 pin connect respectively resistance R38,
Electric capacity C23 and resistance R45, the resistance R45 other ends are grounded, after the resistance R38 other ends and electric capacity C23 other end parallel connections respectively
Concatenation operation amplifier U4B 7 pin and resistance R31, the resistance R31 are connected and are mended electric capacity C15 and believe after exporting amplification shaping
Number；
Ultrasonic echo signal connects the 1 of resistance R29, resistance R36 and chip N2 by electric capacity C23 respectively in the mixting circuit
Pin, resistance R36 other ends ground connection, the resistance R29 other ends pass sequentially through slide rheostat R49 and resistance R30 is connected respectively
Resistance R41 and chip N2 4 pin, the resistance R41 other ends connect resistance R50 and are grounded, resistance R50 other ends connection chip
N2 5 pin, the 14 pin connection -12V voltage signals of the chip N2,12 pin of the chip N2 connect inductance L6, electric capacity respectively
C29 and resistance R40, the electric capacity C29 other ends ground connection, the inductance L6 other ends connect inductance L5, electric capacity C30 and resistance respectively
R38, inductance the L5 other end connect 6 pin and resistance R39 of the chip N2, the electric capacity C30 other ends ground connection, resistance respectively
The R38 other ends connect resistance R37, electric capacity C27, resistance R35 and chip N2 8 pin, the resistance R37 other ends and electric capacity respectively
It is grounded after C27 other end parallel connections, the resistance R35 other ends connect electric capacity C26 and chip N2 10 pin respectively, and electric capacity C26 is another
One end exports reference signal, is connected after the resistance R39 other ends and resistance the R40 other end parallel connections and mends electric capacity C35 and export
Mixed signal；
Mixed signal connects resistance R28 and electric capacity C15, the resistance R28 other ends point respectively in the amplification adjustment circuit
Not Lian Jie electric capacity C20 and operational amplifier U1C 10 pin, the electric capacity C20 other ends connect resistance R32 and resistance R33 respectively,
Resistance R32 other end concatenation operation amplifiers U1C 9 pin, the resistance R33 other ends connect the electric capacity C15 other ends, electric capacity respectively
C25 and operational amplifier U1C 8 pin, electric capacity C25 other end concatenation operation amplifiers U1D 12 pin, operational amplifier U1D's
13 pin connect resistance R58 and resistance R53 respectively, and the resistance R53 other ends connect electric capacity C33 and electric capacity C34 respectively, and electric capacity C33 is another
One end connects after the resistance C58 other ends, the electric capacity C34 other ends and operational amplifier U1D 14 pin after output amplification adjustment respectively
Signal.
2. urban catering cooking fume probe according to claim 1, it is characterised in that the strong magnets (3) have three
It is individual.
3. urban catering cooking fume according to claim 1 probe, it is characterised in that the temperature sensor (9) is
Platinum resistance temperature sensor, the pressure sensor (11) are ceramic pressure sensor.
4. urban catering cooking fume probe according to claim 1, it is characterised in that the material of ultrasonic transducer (10)
Matter is piezoelectric ceramics, and the wafer diameter of ultrasonic transducer (10) is Φ 20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410765427.0A CN104597131B (en) | 2014-12-15 | 2014-12-15 | A kind of urban catering cooking fume probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410765427.0A CN104597131B (en) | 2014-12-15 | 2014-12-15 | A kind of urban catering cooking fume probe |
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| CN104597131A CN104597131A (en) | 2015-05-06 |
| CN104597131B true CN104597131B (en) | 2017-11-10 |
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| CN201410765427.0A Expired - Fee Related CN104597131B (en) | 2014-12-15 | 2014-12-15 | A kind of urban catering cooking fume probe |
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| CN108240873A (en) * | 2018-01-29 | 2018-07-03 | 山西华仁通电力科技有限公司 | A kind of station boiler sound wave thermometric sending device |
| CN109100276A (en) * | 2018-10-11 | 2018-12-28 | 四川尚吕家居科技有限公司 | A kind of oil fume detection system |
| CN109963124B (en) * | 2019-04-03 | 2020-12-08 | 王琪 | Distributed exhibition room environment monitoring system |
| CN112306125A (en) * | 2020-10-29 | 2021-02-02 | 江苏蓝创智能科技股份有限公司 | Oil smoke monitoring device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352743A (en) * | 1999-05-24 | 2002-06-05 | 约瑟夫·鲍莫尔 | Transducer for sonic measurement of gal flow and related characteristics |
| JP2011038870A (en) * | 2009-08-10 | 2011-02-24 | Yokogawa Electric Corp | Ultrasonic flow meter and flow rate measuring method using the same |
| JP2011169665A (en) * | 2010-02-17 | 2011-09-01 | Yokogawa Electric Corp | Flow velocity measuring method and ultrasonic flowmeter |
| JP2012103149A (en) * | 2010-11-11 | 2012-05-31 | Panasonic Corp | Ultrasonic flowmeter |
| CN103858005A (en) * | 2011-10-06 | 2014-06-11 | 韦斯全球有限公司 | Ultrasound system for measuring both flow rate and density using |
| CN103925966A (en) * | 2013-01-15 | 2014-07-16 | Ssi技术有限公司 | Three-mode sensor for determining temperature, level, and concentration of a fluid |
| CN103969327A (en) * | 2014-06-04 | 2014-08-06 | 江南大学 | Ultrasonic lamp black concentration sensor |
-
2014
- 2014-12-15 CN CN201410765427.0A patent/CN104597131B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352743A (en) * | 1999-05-24 | 2002-06-05 | 约瑟夫·鲍莫尔 | Transducer for sonic measurement of gal flow and related characteristics |
| JP2011038870A (en) * | 2009-08-10 | 2011-02-24 | Yokogawa Electric Corp | Ultrasonic flow meter and flow rate measuring method using the same |
| JP2011169665A (en) * | 2010-02-17 | 2011-09-01 | Yokogawa Electric Corp | Flow velocity measuring method and ultrasonic flowmeter |
| JP2012103149A (en) * | 2010-11-11 | 2012-05-31 | Panasonic Corp | Ultrasonic flowmeter |
| CN103858005A (en) * | 2011-10-06 | 2014-06-11 | 韦斯全球有限公司 | Ultrasound system for measuring both flow rate and density using |
| CN103925966A (en) * | 2013-01-15 | 2014-07-16 | Ssi技术有限公司 | Three-mode sensor for determining temperature, level, and concentration of a fluid |
| CN103969327A (en) * | 2014-06-04 | 2014-08-06 | 江南大学 | Ultrasonic lamp black concentration sensor |
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Inventor after: Zhou Siliang Inventor after: Lin Hongbing Inventor after: Zhou Shubing Inventor after: Zhang Puyan Inventor before: Zhou Siliang Inventor before: Yin Yanzhi Inventor before: Hou Xiaolin |
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