CN108302733A

CN108302733A - The parameter regulator control system and method for PDM power drives DBD air purifiers

Info

Publication number: CN108302733A
Application number: CN201810055732.9A
Authority: CN
Inventors: 陈秉岩; 甘育麟; 戚家程; 费峻涛; 朱昌平; 蒋永锋; 殷澄
Original assignee: Changzhou Campus of Hohai University
Current assignee: Changzhou Campus of Hohai University
Priority date: 2018-01-19
Filing date: 2018-01-19
Publication date: 2018-07-20
Anticipated expiration: 2038-01-19
Also published as: CN108302733B

Abstract

The invention discloses a kind of the parameter regulator control system and method for PDM power drives DBD air purifiers, system includes DBD reactors, programmable power supply, PDM high pressure activations power supply, reactor power supply ENERGY E_TDetection unit, relative spectral power detection unit, tested gas concentration detection unit, gas flow rate adjustment unit and data acquisition and regulation and control unit；Atmospheric plasma is generated with the high pressure activation power drives electric discharge device for being operated in PDM patterns, detection obtains the electrical and optical initial parameter in discharge process, initial data is imported into master system and is further analyzed and calculates, whether apparatus for evaluating is operated in optimal discharge state, master system adjusts discharging condition in real time, it is ensured that whole system is operated in optimal discharge state.

Description

The parameter regulator control system and method for PDM power drives DBD air purifiers

Technical field

The invention belongs to air purification fields, and in particular to a kind of parameter regulation and control of PDM power drives DBD air purifiers System and method.

Background technology

In recent years, atmospheric pressure plasma was widely used in environment remediation, and contamination control is biomedical, flowing control System and material processing etc..Dielectric barrier discharge (dielectric barrier discharge:DBD it is) to have dielectric It is inserted into a kind of nonequilibrium state gas discharge of discharge space, has the characteristics that stable discharge and machining area are big, is under normal pressure One of the effective ways for generating low temperature plasma, are suitable for large-scale industrial production, have broad application prospects.In reality In, the supply voltage of DBD, supply current, for electricity parameters such as electric fluxs are pole in low temperature plasma research and application Its important parameter, they interact in discharge process, the effect of generation, the electric discharge of the multiple micro discharge of joint effect and wait The characteristic of gas ions.The accurate effective energy for measuring simultaneously calculation medium barrier discharge system, which will become, improves dielectric barrier discharge The key point of energy is of great significance for improving the discharging efficiency of dielectric barrier discharge in the application.

It is uncertain with space-time since DBD consumes energy by a large amount of of short duration micro discharges, therefore output power and energy Amount is difficult to measure.For the energy balane of this kind of electric discharge, generally use voltage-charge Lee Sa such as (Lissajous) graphic-arts technique.But It is that there has been no methods to carry out standard to reactor for electric flux when electric discharge is discontinuous or supply voltage current peak is not fixed Really calculate.If DBD under High Level AC Voltage source forcing is directly applied to for the computational methods of electric flux and is operated in power density tune Make (power density modulation:PDM) reactor of the high pressure activation power drives of pattern is powered energy meter It calculates, has the following problems：

(1) according to the flash-over characteristic of PDM power supplys, within one section of working time, voltage current waveform is discontinuous；

(2) strength of discharge of each power-up period is different with supply voltage current peak；

(3) in a power-up period, discharge time is adjustable, therefore discharge time interior at work is not solid It is fixed.Therefore, traditional lissajous figures method calculate DBD for electric flux be not suitable for being applied directly to PDM power drives DBD systems into Row energy expenditure is analyzed, if being capable of providing a kind of power supply energy method computations for using PDM power supplys excitation DBD inductors, And the auto-control for realizing whole system, by the research of DBD, using with directive significance.

Documents：A kind of dielectric barrier discharge circuit parameter detection device and detection method (201310132909.8). A kind of detect and calculation medium barrier discharge DBD reactor equivalent parameters detection devices and inspection is devised according to lissajous figures method Survey method.But the patent mainly calculates the equivalent parameters of reactor according to lissajous figures, not to discontinuous, confession The unfixed discharge condition of piezoelectric voltage peak value is analyzed, do not propose it is corresponding in the case of power supply energy balane algorithm idea and Discharge effect appraisal procedure, and the auto-control of system is not implemented.

Optimal discharge state defines：Dielectric barrier discharge can generate the active specy with strong oxidizing property, when DBD reacts When the unit energy consumed on device can generate the active specy of maximum concentration, system reaches optimal discharge state.Under this state Discharge parameter and gas flow rate be optimal discharge condition.

Invention content

The purpose of the present invention is to provide one kind to be monitored in real time in the process of running to DBD air purifiers, And the regulator control system that DBD devices are operated in best operating status is controlled, propose the automatic detection regulation and control system of DBD air purifiers System and method, realization make DBD to the automatic detection of DBD system discharge parameters, assessment and to the adjust automatically of discharging condition Reactor is operated in optimal discharge state.

The present invention adopts the following technical scheme that electric parameter and optical parameter towards DBD reactors diagnose, with PDM works The high pressure activation power drives electric discharge device of operation mode generates atmospheric plasma, and is put using a series of detection means Electrical and optical initial parameter in electric process, initial data is imported into master system be further analyzed with Calculate, by lissajous figures calculate reactor for electric flux, then whether apparatus for evaluating is operated in optimal discharge state, together When master system to discharging condition carry out real-time control, it is ensured that whole system is operated in optimal discharge state.

The parameter regulator control system of PDM power drives DBD air purifiers, including DBD reactors, programmable power supply, PDM high pressure activations power supply, reactor are for electric flux (E_T) detection unit, relative spectral power detection unit, tested gas concentration Detection unit, gas flow rate adjustment unit and data acquisition and regulation and control unit, wherein：

DBD reactors generate high energy particle and Strong oxdiative substance purification air for discharging；

Programmable power supply, is connected with PDM high pressure activation power supplys, the input electricity for setting PDM high pressure activation power supplys Pressure, and then control PDM high pressure activation power supplys and be supplied to the supply voltage of reactor and the power of discharge system, discharge system to include PDM high pressure activations power supply and DBD reactors；

PDM high pressure activation power supplys, are connected with DBD reactors, as the excitation power supply of DBD reactors, for adjusting electric discharge Condition；

Reactor power supply ENERGY E_TDetection unit is connected with DBD reactors, is used for the electric parameter of detecting system, will count According to data acquisition and regulation and control unit is transferred to, the ENERGY E of PDM power inputs consumption is obtained_IN, reactor is obtained for electric flux E_T；

Relative spectral power detection unit is connected with DBD reactors, emits light for detecting active specy in region of discharge The relative intensity of spectrum, and transfer data to data acquisition and regulation and control unit；

Tested gas concentration detection unit is to detect the sensor of air quality, is located at the gas outlet of DBD reactors, is used In the purified air quality of detection, and transmit data to data acquisition and regulation and control unit；

Gas flow rate adjustment unit is located at the air inlet of DBD reactors, for receiving data acquisition and regulation and control unit Signal adjusts gas flow rate；

Data acquire and regulate and control unit, for receiving reactor power supply ENERGY E_TThe electric parameter number of detection unit transmission Active specy relative spectral power signal according to the transmission of, relative spectral power detection unit and tested gas concentration detection unit The air quality data of transmission handles data in real time, assesses the working condition of DBD reactors, to programmable power supply electricity Source, PDM high pressure activations power supply and gas flow rate carry out real-time control.

Preferably, reactor power supply ENERGY E_TDetection unit includes high voltage attenuator, current transformer, voltage sensor And digital oscilloscope, high voltage attenuator are connected to the high-voltage output end of PDM high pressure activation power supplys, measure the confession of DBD reactors Piezoelectric voltage；Current transformer is connected on the ground wire in circuit, measures the discharge current for flowing through entire circuit；DBD reactors are put Electrical circuit includes the integrating capacitor of one end connection ground wire, and the integral voltage in integrating capacitor is obtained by voltage sensor.

Preferably, high voltage attenuator uses capacitance partial pressure method, and the high-voltage signal of PDM high pressure activation power supplys output is converted The supply voltage acquisition channel interface of digital oscilloscope is transferred at low voltage signal.

Preferably, current transformer is the uniform close air core solenoid being wound on annular nonmagnetic skeleton, output voltage with Tested electric current is proportional, and the discharge current acquisition channel that the voltage signal that current transformer senses is accessed to digital oscilloscope connects Mouthful.

Preferably, relative spectral power detection unit is fiber spectrometer, and electronics is occurred for active specy in discharge process The optical signalling that energy level transition generates is converted into electric signal and acquires and regulate and control unit electric signal transmission to data.

Preferably, data acquisition is located at regulation and control unit in host computer, supply voltage, discharge current and the integral detected Three electric parameters of voltage signal are acquired by digital oscilloscope, and host computer is transferred data to by oscillograph.

The parameter of PDM power drives DBD air purifiers regulates and controls method, includes the following steps：

(1) discharging condition of PDM high pressure activation power supplys, including supply voltage, frequency of supply, the frequency in Power Regulation period are set Rate, the duty ratio of power-on time；

(2) it in discharge process, detects in discharge current, supply voltage, integral voltage and the region of discharge of DBD reactors The relative spectral power of active specy will carry out original in discharge current, supply voltage and integral voltage signal input oscillograph Data acquire；

(3) utilize data transmission interface and interactive software that digital oscilloscope and spectrometer are connected with host computer respectively, The initial data that acquisition is stored on host computer obtains related discharge parameter by being calculated and handled in host computer, and by result Output display；

(4) it assesses to obtain corresponding discharging condition and gas flow rate in optimal discharge effect according to discharge effect, determines Parameter area；

(5) host computer is according to opposite quantum yield Energy Efficiency Ratio E_erDischarging condition or gas flow rate are adjusted in real time, make reaction Device is operated in best opposite quantum yield Energy Efficiency Ratio E_erIn neighbouring threshold range.

Preferably, data calculate and processing step is followed successively by supply voltage processing, discharge current processing, for electric energy Amount calculates, equivalent parameters calculates and opposite quantum yield Energy Efficiency Ratio calculates, and respectively obtains supply voltage peak-to-peak value, effectively puts Always for electric flux, single power-up period average energy, reactor in electric total time, averagely micro discharge intensity, system operation time Equivalent capacity, opposite quantum yield Energy Efficiency Ratio.

Preferably, supply voltage is detected by high voltage attenuator using capacitance partial pressure method, and high voltage signal is turned It changes low voltage signal into be acquired, formula is as follows：

Wherein, U_C2For CH₁Hold collected voltage, CH₁Indicate the supply voltage acquisition channel interface of oscillograph, U is quilt Survey VR_HThe voltage at end, VR_HThe High voltage output terminal voltage of PDM high pressure activation power supplys, i.e. DBD reactors high voltage supply terminal voltage, C₁And C₂For the capacitance of high-voltage capacitance；According to the data for the supply voltage acquisition channel for acquiring and storing in real time in host computer, conversion Output is shown for the peak-to-peak value of actual power voltage.

Preferably, average micro discharge intensity and effectively electric discharge total time is calculated in discharge current process part, specific to walk Suddenly it is：

101) discharge current is detected by current transformer；

102) discharge current waveform is reconstructed, obtained discharge current waveform is called in MATLAB Sgolayfilt functions are smoothed using Savitzky-Golay smoothing algorithms；

103) original discharge current waveform subtracts each other with the current waveform that smoothing processing is crossed, and obtain in discharge process micro- puts The Wave data of electric current；

104) the electric discharge initial time of each power-up period is obtained according to the Wave data of micro discharge electric current and electric discharge ends Time, electric discharge deadline and initial time subtraction calculations of discharging go out effective discharge time of single power-up period, i.e. current wave Effective discharge time of all power-up periods is added up and is effectively discharged total time by the time that micro discharge occurs in shape；

105) the micro discharge peak value of pulse of each power-up period is obtained according to the Wave data of micro discharge electric current, calculates electric discharge Average micro discharge intensity in the process, average micro discharge intensity is the sum of peak value of all micro discharge pulses divided by micro discharge pulse Number；

106) to total time and the average micro discharge intensity output display of effectively discharging in discharge process.

Preferably, the average energy of single power-up period and system in system operation is obtained by energy balane of powering to transport Always for electric flux in the row time, specially：

111) basis obtains supply voltage and integral voltage carries out the lissajous figures reconstruct of single power-up period；

112) lissajous figures of each reconstruct are powered with the integral and calculating of voltage and integral voltage, obtains Li Saru The area S of figure_d,i, the ENERGY E of single power-up period is obtained in conjunction with formula_d,i

Wherein u_m(t) refer to integral voltage, C_mFor the capacitance of external integrating capacitor, T_d,iIndicate the time of single power-up period, U (t) is supply voltage, and i (t) is supply current, and subscript d, i indicate the number of power-up period；

One Power Regulation cycle T_m,jInterior power-up period number n_dm,jFor

Wherein n_dm,jIt is a Power Regulation cycle T_m,jInterior power-up period number, D_jIt is a Power Regulation cycle T_m,jWhen middle power supply Between duty ratio, duty ratio adjusting range be D_j=0~1, subscript m, j indicates the cycle times of power density adjustment；

Wherein T_on,jIt is duration of power supply, total power-up period number N in run time_on,tFor

N_on,tIt is total power-up period number, T in run time_tIt is the operation total time of power supply system；

One Power Regulation cycle T_m,jAlways for electric flux be Power Regulation cycle T_m,jInterior single power-up period ENERGY E_d,iThe sum of, i.e.,

E_m,jIt is Power Regulation cycle T_m,jAlways for electric flux, i.e. a Power Regulation cycle T_m,jThe gross energy of consumption；

The average power supply ENERGY E of single power-up period_d,aFor

The gross energy E of system consumption in run time_TFor

113) output shows ENERGY E of averagely powering_d,aWith the gross energy E of system consumption in run time_T。

Preferably, according to obtaining supply voltage and integral voltage carries out the lissajous figures of single power-up period and reconstructs, with Integral voltage is abscissa data, supply voltage is that ordinate data carry out figure reconstruction, obtains what all power-up periods stacked Lissajous figures carry out signal period image separation, and it is single lissajous figures to keep single power-up period corresponding, single to power Periodic waveform data separating detailed process is as follows：

121) supply voltage, supply current, integral voltage data are read, the supply voltage maximum value in memory length is found out The corresponding abscissa t of point_aAbscissa t corresponding with supply voltage minimum point_b, in the discharge waveform of PDM high pressure activation power supplys, Supply voltage maximum value and minimum value are adjacent two extreme points, the corresponding abscissa t of supply voltage maximum of points_aAnd power supply The corresponding abscissa t of voltage minimum point_bBetween be divided into the time T of half of power-up period_d,i/2；

122) the corresponding abscissa t of selection supply voltage maximum of points_aAbscissa t corresponding with supply voltage minimum point_b Abscissa midpoint x_i, from midpoint x_iCorresponding coordinate starts, and abscissa successively decreases half of power-up period, after successively decreasing every time, after successively decreasing Click-through line slope judge, if slope is more than setting thresholding, indicate the coordinate points in power supply process, continue to successively decrease until slope Less than setting thresholding；If slope is less than setting thresholding, then it represents that the point is not in power supply process；

123) it is less than the point of setting thresholding for slope, is denoted as suspicious starting point p, setting thresholding is more than most for slope The latter point, is denoted as q, and starting point is chosen using dichotomy in (p, q) range：

(a) p, the midpoint of q is taken to be denoted as m, alignment judges into line slope；

If (b) slope is less than setting thresholding, using the midpoint abscissa as the p of next range points, otherwise by the midpoint Q point of the abscissa as next range；

(c) repeat (a) (b) until siding-to-siding block length be less than setting thresholding, if p, q siding-to-siding block length be less than setting thresholding, then this When (p, q) midpoint be starting point, the abscissa of starting point is s；

124) since starting point, the abscissa of supply current is incremented by T_d,i/ 2 length, to the click-through after being incremented by every time Line slope judges, if slope is more than setting thresholding, abscissa continues to be incremented by until slope is less than setting thresholding；It is small for slope In the point of setting thresholding, it is denoted as suspicious terminating point v, the last one point of setting thresholding is more than for slope, u is denoted as, at (u, v) In range terminating point is chosen using dichotomy.

125) in the range of starting point is to terminating point, since starting point, each T_d,iLength range is a power supply Period respectively stores the coordinate of each point in each single power-up period, completes supply voltage, supply current, integral The separation of voltage data.

Preferably, the equivalent capacity parameter of DBD reactors is calculated by equivalent parameters, according to supply voltage and integral Voltage carries out the lissajous figures reconstruct of single power-up period, and four apex coordinates of lissajous figures are respectively A (U_x1,U_y1)、 B(U_x2,U_y2)、C(U_x3,U_y3)、D(U_x4,U_y4), the abscissa and ordinate on each vertex are respectively the integral electricity on corresponding time point Pressure and supply voltage, the equivalent capacity data of single power-up period are obtained by following formula

Wherein C, C_dAnd C_gBe respectively single power-up period total equivalent capacity, medium equivalent capacity and discharging gap it is equivalent Capacitance；

It is averaged to the rhythmic capacitance of institute, obtains equivalent capacity average value.

Preferably, according to collected relative spectral power data and the Power Regulation period-power-supplying ENERGY E being calculated_m,j, lead to It crosses following formula and opposite quantum yield Energy Efficiency Ratio is calculated

Wherein, E_erFor opposite quantum yield Energy Efficiency Ratio, I is the relative spectral power of hydroxyl.

Preferably, discharge effect assessment is to utilize climbing hill algorithm, with the discharging condition or gas stream in a Power Regulation period Speed is horizontal axis, PDM power supply conversion efficiencies or opposite quantum yield Energy Efficiency Ratio E_erFor the longitudinal axis, pass through the electric discharge of constantly regulate system Condition or gas flow rate compare the opposite quantum yield Energy Efficiency Ratio E of the front and back DBD reactors of adjustment_erSituation of change, then root Reactor is set to be operated in best opposite quantum yield Energy Efficiency Ratio E to adjust discharging condition or gas flow rate according to situation of change_erIt is attached In close threshold range.

Preferably, it is the supply voltage peak value for changing PDM high voltage power supplies and being supplied to DBD reactors, tool to change discharging condition Body is that the programmable power supply of master system is connected, and the output voltage of programmable power supply is adjusted from original state, can Input voltage of the output voltage of power supply as PDM high pressure activation power supplys is programmed, DC/DC transformation is first passed through, it is variable to obtain amplitude High-voltage dc voltage, high-voltage dc voltage obtains alternating voltage by full bridge inverter, using step-up transformer, obtains Required output voltage；Master system finds best phase using newton hill-climbing algorithm during adjusting supply voltage To quantum yield Energy Efficiency Ratio E_erCorresponding power supply voltage range, by changing to may be programmed the real-time monitoring of power supply PDM high pressure activation power supplys are supplied to the supply voltage of DBD reactors, make opposite quantum yield Energy Efficiency Ratio E_erIt is maintained at best model In enclosing.

Preferably, change discharging condition to change for electric flux, that is, adjust the duty of power-on time in a Power Regulation period Than changing power density, changing the number that PDM power supplys are supplied to the power-up period of DBD reactors, to change for electric flux.

Preferably, it is to change supply voltage frequency to change discharging condition, PDM high pressure activations power supply and DBD reactor groups at Series resonant tank adjusts power-up period T_d,i, as change frequency of supply, system made to be operated in resonance match point, i.e. PDM high Press the frequency of supply of excitation power supply identical as the resonant frequency of system.

The reached advantageous effect of invention：The present invention is a kind of parameter regulation and control system of PDM power drives DBD air purifiers System and method, realization make DBD to the automatic detection of DBD system discharge parameters, assessment and to the adjust automatically of discharging condition Reactor is operated in optimal discharge state., in addition, the present invention solves the output power of DBD reactors and energy is difficult to measure The technical issues of, each power-up period energy of reactor can be directly surveyed, the energy of single power-up period can also be tired out Add statistics, obtains the energy consumed in any time period, can apply in continuous discharge state, and can apply in discontinuous electric discharge In state；Traditional running efficiency of system assessment is the energy using the energy and high voltage power supply input terminal of the output end of high voltage power supply For the ratio of amount as energy conversion efficiency, the present invention can obtain the energy consumed on reactor, therefore more accurately obtain By the energy conversion efficiency of reactor.

Description of the drawings

Fig. 1 is the system entire block diagram of the present invention；

Fig. 2 is the system connection location diagram of the present invention；

Fig. 3 is the discharge parameter acquisition schematic diagram of the present invention；

Fig. 4 is the supply voltage detection circuit of the present invention；

Fig. 5 is the current transformer of the present invention；

Fig. 6 is power density modulation power source typical case's supply waveform of the present invention；

Fig. 7 is the supply waveform under the source forcing of (a) High Level AC Voltage；(b) DBD typical case's Lie groupoid；

Fig. 8 is the detecting step flow chart of the present invention；

Fig. 9 is the parameter processing flow chart of the present invention；

Figure 10 is the discharge current process chart of the present invention；

Figure 11 is the power supply energy balane flow chart of the present invention；

Figure 12 is that the power-up period starting point of the present invention searches schematic diagram；

Figure 13 is the single power-up period separation process figure of the present invention；

Figure 14 is the equivalent parameters calculation flow chart of the present invention；

Figure 15 is the quantum yield Energy Efficiency Ratio calculation flow chart of the present invention；

Figure 16 is the newton hill-climbing algorithm schematic diagram of the present invention；

Figure 17 is that the programmable power supply of the present invention adjusts reactor supply voltage procedure chart；

Figure 18 is the PDM electric power output voltages duty ratio and frequency of supply control principle of the present invention；

Figure 19 is the Power Regulation period control principle of the present invention；

Figure 20 is the Power Regulation cycle control signal circuit diagram of the present invention；

Figure 21 is the frequency of supply Principles of Regulation figure of the present invention.

Specific implementation mode

Below according to attached drawing and technical scheme of the present invention is further elaborated in conjunction with the embodiments.

Fig. 1 is the system entire block diagram of the present invention, and Fig. 2 is the system connection location diagram of the present invention.A kind of PDM power drives The parameter regulator control system and method for DBD air purifiers, including DBD reactors, programmable power supply, PDM high pressure activation electricity Source, reactor power supply ENERGY E_TDetection unit, relative spectral power detection unit, tested gas concentration detection unit, gas stream Fast adjustment unit and data acquisition and regulation and control unit, wherein：

Preferably, the condition of power supply of DBD reactors changes, PDM high pressures with the operating mode of PDM high pressure activation power supplys The operating mode of excitation power supply by change power-on time, frequency of supply, in a Power Regulation period power-on time duty ratio into Row is adjusted.In discharge process, relative spectral power, discharge current, supply voltage and integral voltage are carried out to DBD reactors Detection, data collecting system record the data detected, then the calculating and processing of data are carried out by master system.Figure 3 acquire relational graph, reactor power supply ENERGY E for discharge parameter_TDetection unit includes high voltage attenuator, current transformer, electricity Pressure sensor and digital oscilloscope, high voltage attenuator are connected to the high-voltage output end of PDM high pressure activation power supplys, and it is anti-to measure DBD Answer the supply voltage of device；Current transformer is connected on the ground wire in circuit, measures the discharge current for flowing through entire circuit；DBD is anti- It includes the integrating capacitor of one end connection ground wire to answer the discharge loop of device, and the integral electricity in integrating capacitor is obtained by voltage sensor Pressure.

Preferably, high voltage attenuator uses capacitance partial pressure method, supply voltage peak value to arrive 40kV 20, PDM high pressures are swashed The high-voltage signal for encouraging power supply output is converted into the supply voltage acquisition channel interface that low voltage signal is input to oscillograph, VR_HIt is The high-voltage output end of PDM high pressure activation power supplys, i.e. DBD reactors high voltage supply end；CH₁Indicate the supply voltage acquisition of oscillograph Channel interface.C1 and C2 uses high-voltage capacitance, as shown in Figure 4.

Preferably, Fig. 5 is current transformer, and for detecting discharge current, bandwidth is 100Hz to 100kHz.In figure, VR_L It is the ground terminal that PDM high pressure activations power supply is connect with DBD reactors；CH2 indicates the discharge current acquisition channel interface of oscillograph. Current transformer is the uniform close air core solenoid being wound on annular nonmagnetic skeleton, and output voltage is proportional to tested electric current, The voltage signal that current transformer is sensed accesses the discharge current acquisition channel interface of digital oscilloscope.

Preferably, relative spectral power detection unit is fiber spectrometer, and electronics is occurred for active specy in discharge process The optical signalling that energy level transition generates is converted into electric signal and acquires and regulate and control unit electric signal transmission to data, passes through data Acquisition port transfers data to host computer.

If Fig. 8 is detecting step main flow chart, the parameters of PDM power drives DBD air purifiers regulates and controls method, including with Lower step：

(1) discharging condition of PDM high pressure activation power supplys, including supply voltage, frequency of supply, the frequency in Power Regulation period are set Rate, in the Power Regulation period power-on time duty ratio；

Preferably, it is preferable that if Fig. 9 is parameter processing flow chart, data calculate and processing step is followed successively by confession Piezoelectric voltage processing, discharge current processing, power supply energy balane, equivalent parameters calculates and opposite quantum yield Energy Efficiency Ratio calculates, Respectively obtain supply voltage peak-to-peak value, effectively electric discharge total time, average micro discharge intensity, in system operation time always for electric energy Amount, single power-up period average energy, reactor equivalent capacity, opposite quantum yield Energy Efficiency Ratio.

Preferably, Figure 10 is discharge current process chart, and it is strong that average micro discharge is calculated in discharge current process part Degree and effectively electric discharge total time, the specific steps are：

101) discharge current is detected by current transformer；

Data=xlsread (' discharge current .xlsx')；% reads in data

B=data (:,1)；

Y=sgolayfilt (b, 3,7)；% smoothing processings

plot(y,'r')；

hold on

Preferably, Fig. 6 is the typical supply waveform that power density modulates PDM high pressure activation power supplys, T_m,jIt is close for a power Modulation period is spent, i.e. the Power Regulation period, PDM high pressure activation power supplys are modulated for the power density of a fixed frequency, are adjusting electricity When the output power and voltage in source, T_m,jIt is fixed.T_on,jFor the discharge time in a Power Regulation period, by multiple single confessions Electric period composition, in T_m,jWhen fixed, by changing T_on,jChange duration of power supply, you can change for electric flux.Therefore, right PDM high pressure activation power supplys, putting in supply voltage, the frequency of single power-up period, a power-up period are modulated in power density Electric number can be carried out adjusting.Since power density modulation PDM high pressure activation power supplys have electric discharge discontinuous, discharge frequency can The features such as tune, power-up period number can be changed, needs one kind being directed to the lower medium of power density modulation PDM high pressure activation power supplys excitation Computational methods of the barrier discharge DBD reactors for electric flux.The method designed herein can tire out single power-up period energy Add calculating, the method for obtaining gross energy, the method can calculate discontinuous for electric flux and calculating under continuous duty Under working condition for electric flux.

Fig. 7 shows the exemplary voltages current waveform of excitable media barrier discharge DBD reactors.Fig. 7 (a) is power-up period Waveform (enlarged drawing of the power pack of Fig. 6).It is observed that the generation of micro discharge, corresponding diagram b in supply current waveform AB the and CD periods of middle label, and there is displacement current in the period labeled as BC and DA.Fig. 7 (b) is excitable media resistance The voltage charge lissajous figures for electric flux of gear electric discharge DBD reactors.

Figure 11 is power supply energy balane flow chart, and by powering, energy balane obtains single power-up period in system operation Always for electric flux in average energy and system operation time, specially：

111) basis obtains supply voltage and integral voltage carries out the lissajous figures reconstruct of single power-up period, automatic to read Take the data of " supply voltage " and " integral voltage " acquisition channel stored in host computer.According to obtained data, carry out single The lissajous figures in period reconstruct.Since lissajous figures are the curves that two orthogonal vectors are synthesized when doing periodic swinging, In the present solution, the vibration frequency of two vectors is identical, closed figure can be synthesized.But in vibration processes, vector Mould is to be not fixed, therefore the feature size of each periods synthesizer can be variant.When being powered energy balane, need to each The area of period lissajous figures is calculated, therefore to be carried out the reconstruct of figure and be detached to each period, and figure is established The rule of shape separation；

One Power Regulation cycle T_m,jInterior power-up period number n_dm,jFor

Wherein n_dm,jIt is a Power Regulation cycle T_m,jInterior power-up period number, D_jIt is a Power Regulation cycle T_m,jWhen middle power supply Between duty ratio, subscript m, j indicate power density adjustment cycle times；

The average power supply ENERGY E of single power-up period_d,aFor

The gross energy E of system consumption in run time_TFor

Preferably, according to obtaining supply voltage and integral voltage carries out the lissajous figures of single power-up period and reconstructs, with Integral voltage is abscissa data, supply voltage is that ordinate data carry out figure reconstruction, obtains what all power-up periods stacked Lissajous figures carry out signal period image separation, and it is single lissajous figures to keep single power-up period corresponding, and Figure 13 is this The single power-up period separation process figure of invention, single power-up period Wave data separation detailed process are as follows：

121) supply voltage, supply current, integral voltage data are read, the supply voltage maximum value in memory length is found out The corresponding abscissa t of point_aAbscissa t corresponding with supply voltage minimum point_b, as shown in figure 12, PDM high pressure activation power supplys In discharge waveform, supply voltage maximum value and minimum value are adjacent two extreme points, the corresponding cross of supply voltage maximum of points Coordinate t_aAbscissa t corresponding with supply voltage minimum point_bBetween be divided into the time T of half of power-up period_d,i/2；

Preferably, Figure 14 is equivalent parameters calculation flow chart, and the equivalent electricity of DBD reactors is calculated by equivalent parameters Holding parameter, the lissajous figures that single power-up period is carried out according to supply voltage and integral voltage reconstruct, and the four of lissajous figures A apex coordinate is respectively A (U_x1,U_y1)、B(U_x2,U_y2)、C(U_x3,U_y3)、D(U_x4,U_y4), the abscissa and ordinate on each vertex Integral voltage and supply voltage on respectively corresponding time point obtain the equivalent capacity number of single power-up period by following formula According to

Preferably, Figure 15 is opposite quantum yield Energy Efficiency Ratio E_erCalculation flow chart is strong according to collected relative spectral Degrees of data and the Power Regulation period-power-supplying ENERGY E being calculated_m,j, opposite quantum yield efficiency is calculated by following formula Than

It is the schematic diagram of climbing hill algorithm as shown in figure 16, horizontal axis indicates discharging condition or gas flow rate, including power supply frequency Rate, supply voltage, power density, gas flow rate.The longitudinal axis indicates the energy conversion efficiency E of PDM power supplys_T/E_INOr opposite light quantum Yield E_er.Climbing hill algorithm is also known as perturbation observation method, compares adjustment by the discharging condition of constantly regulate exoelectrical reaction system The E of front and back DBD reactors_erSituation of change, adjust discharging condition further according to situation of change, including programmable power supply Output voltage, the supply voltage of PDM high pressure activation power supplys, frequency of supply, the parameter for electric flux, make discharge reactor be operated in Best E_erNear.It is as follows that climbing hill algorithm specific works situation can be analyzed according to Figure 16：

(1) add a disturbance variable in A points, such as change for electric flux, make the E of reactor_erReach B points；

(2) improved before detecting makes the opposite quantum yield Energy Efficiency Ratio of reactor increase for electric flux, continues former The direction come increases disturbance variable, and reactor is made to be operated in C points；

(3) continue original direction and add disturbance variable, reactor is made to be operated in M points；

(4) continue original direction and add disturbance variable, reactor is made to be operated in D points；

(5) disturbance variable before detecting at this time makes the opposite quantum yield Energy Efficiency Ratio of reactor reduce, and changes Direction originally adds disturbance variable, makes the E of reactor_erAgain reach M points；

(6) continue original direction and add disturbance variable, reactor is made to be operated in C points；

(7) finally, the operating condition of reactor is in C points, M points, and D points fluctuate between three operating points.

Disturbance variable in algorithm can use gas flow rate, supply voltage, Power Regulation period for electric flux.Using this Method can determine best opposite quantum yield Energy Efficiency Ratio, and can obtain corresponding discharging condition, therefore can be with Determine optimal discharge parameter regulation range.

In newton hill-climbing algorithm, M points determined by the step-length according to disturbance variable are not necessarily E_erPeak, true After having determined optimal parameter adjustable range C to D, the step-length of disturbance variable is reset with optimum seeking method, according to the following steps Find out peak：

(1) in the section (C, the M) midpoints Nei Qu P1, the section (M, the D) midpoints Nei Qu P2；

(2) when the corresponding functional values of P1 functional value corresponding more than P2, the maximum of opposite quantum yield Energy Efficiency Ratio In the section (P1, M), the section of (M, P2) is cast out；

(3) conversely, maximum is in the section (M, P2), cast out the section (P1, M)；

(4) when the corresponding functional values of P1 and P2 are equal, maximum in (P1, P2) range, cast out (C, P1) and (P2, D section)；

(5) midpoint is taken again in remaining section, find P3, P4, continue to change in a manner of step (1) to (4) In generation, calculates；Until remaining interval range is less than setting valueWhen, algorithm terminates.

When independent variable is gas flow rate,Value be 0.1m/s；When independent variable is supply voltage,Value be 0.1kV； When independent variable is the energy in a Power Regulation period,It is 10mJ.

According to the newton hill-climbing algorithm of Figure 16, independent variable is set as frequency of supply first, dependent variable is PDM high pressure activation electricity The energy conversion efficiency in source determines PDM high pressure activations power supply and the matched resonance center of DBD reactors according to newton hill-climbing algorithm Frequency.The energy conversion efficiency of PDM power supplys is defined as E_T/E_IN, wherein E_INIt is that programmable power supply is supplied to PDM power inputs Energy, E_TBe PDM power supplys be supplied to DBD reactors for electric flux.Change the power supply that PDM power supplys are supplied to DBD reactors Frequency finds out best PDM power supply conversion efficiencies range, determines resonance center frequeH f₀.By frequency of supply control in resonance Within the scope of frequency of heart, other discharging conditions are all regulated and controled in the case of the determination of resonance center frequeH.

Change with the change for electric flux with respect to quantum yield Energy Efficiency Ratio, for electric flux and supply voltage and power supply Number of cycles is related.The supply voltage amplitude of power density modulation PDM high pressure activation power supplys output is by changing power density What the output voltage of the input voltage (i.e. programmable power supply) of modulation PDM high pressure activation power supplys obtained, power density modulation The power-up period number of PDM high pressure activation power supplys output determines the power density of power supply.In the present invention, the maximum of supply voltage Adjustable extent is 10 to 30kV.When a Power Regulation cycle T_m,jThe duty ratio D of middle power-on time_jWhen being 1, a Power Regulation period In power-up period number be N=T_m,j/T_d,i, therefore adjustable power-up period number ranging from 1 arrives N.In supply voltage and In power-up period number adjustable range, after obtaining best opposite quantum yield Energy Efficiency Ratio, it may be determined that supply voltage and work( The best adjustable range of rate density.

In gas treating process, the active specy that the electric discharge of DBD reactors generates has strong oxidizing property, is that degradation is toxic The most important substance of gas.It is closely related by total gas flow rate of DBD reactors and the yield of active specy.In the present apparatus Obtain the E of active specy_erWith the situation of change of gas flow rate, obtain that best E can be generated_erGas flow rate.When flow velocity is super When going out optimum range, master system generates corresponding actions, and auto-control valve changes gas flow rate.In this course, gas Body flow velocity signal is real-time transmitted in master system, and whether master system judges this moment in best E_erWithin the scope of, if not Meet, then corresponding actions are generated to valve, adjusts flow velocity until reactor is operated in optimum condition.

For dielectric barrier discharge, the charged particle, photon, shock wave and the neutral particle that generate in region of discharge it Between mutually collide, occur excitation, dissociation, decompose etc. reactions, generate active specy (such as ultraviolet light (UV), hydroxyl radical free radical (OH), oxygen atom free radical (O), ozone (O₃), hydrogen peroxide (H₂O₂) etc.).Electron collision is that active specy is most important next Source when only electron energy is higher than the Chemical bond energy of molecule, can generate work when electron and molecule collides to molecule With.Therefore the premise that active specy generates is generation high energy electron, so in the interaction process of electronics and substance, if The electron beam of higher energy and density can be obtained, then can obtain better discharge effect.

Preferably, it is the supply voltage peak value for changing PDM high voltage power supplies and being supplied to DBD reactors to change discharging condition, is situated between In matter barrier discharge DBD reactors, the electric field strength between two electrodes is bigger, and the electron energy generated between electrode is bigger. And since the distance between electrode is fixed, so the electric field strength between electrode is by loading the supply voltage at reactor both ends It adjusts.Change the supply voltage of reactor, the electron energy in region of discharge changes, and leads to the change of reaction rate, also It will produce different reaction products.

Think that the higher the better for supply voltage on reactor in traditional sense, but if overtension, one side high pressure swashs The technology for encouraging power supply is difficult to realize detect, and on the other hand to the detection of voltage signal, there is also difficulties.Therefore in the present system, when After programmable power supply and power density modulation PDM high pressure activation power supplys are started to work, master system by I2C interface or SPI interface is connected with programmable power supply, and the output voltage of programmable power supply is adjusted from original state, changes power The supply voltage of density modulation PDM high pressure activation power supplys, the process that programmable power supply adjusts supply voltage are as shown in figure 17.It can compile Input voltage of the output voltage of journey power supply as PDM high pressure activation power supplys first passes through DC/DC transformation, obtains what amplitude can be changed High-voltage dc voltage, high-voltage dc voltage obtain alternating voltage by full bridge inverter, using step-up transformer, obtain institute The output voltage needed.The output end that reactor is connected on to PDM high pressure activation power supplys discharges.It can be seen by above procedure Go out, the output voltage for changing programmable power supply by master system is the power supply of changeable dielectric barrier discharge DBD reactors Voltage.

With the variation of supply voltage, master system according to the data detected to being calculated for electric flux, in conjunction with Spectral intensity assesses quantum yield Energy Efficiency Ratio.It is looked for during adjusting supply voltage using newton hill-climbing algorithm To best E_erCorresponding power supply voltage range monitors supply voltage in real time in system operation, passes through programmable power supply The real-time monitoring of power supply changes the supply voltage that PDM high pressure activation power supplys are supplied to DBD reactors, is allowed to be maintained at best model In enclosing.The most common situation is that best supply voltage corresponds to the output area of a programmable power supply when most starting to work, with The progress of electric discharge, the phase has been insufficient to allow the sufficiently large of PDM power supplys offer to the programmable power supply output voltage of setting after discharge Supply voltage, need the output voltage of programmable power supply being turned up at this time, by supply voltage control in optimum range.

In the case where supply voltage is constant, the electron energy of Single Electron is certain, if wanting to promote electric discharge effect at this time Fruit can start in terms of changing the concentration for generating active specy of discharging.By changing the electron concentration in discharge reactor, can change Become the concentration of active constituent.Due to(Q indicates that the quantity of electric charge, i indicate electric current), the raising of electron concentration is macroscopically showing Electric current to flow through system increases, therefore adjusts electron concentration and namely change discharge current.In the situation that supply voltage is constant Lower change electric current, that is, change reactor for electric flux.In PDM high pressure activation power supplys, by improving T_on,jChange work( Rate density adjusts the duty ratio D of power-on time in the Power Regulation period_j, to change for electric flux.By above procedure, improve Electron concentration in reactor, improves the concentration of active specy, that is, improves the reaction rate of air purification processing.

It is PDM high pressure activation electric power output voltage duty ratios and frequency of supply control principle as shown in figure 18.Pass through control The on off state of switching tube in full bridge inverter achievees the purpose that change output waveform duty ratio and frequency.The Power Regulation period is controlled Waveform processed controls waveform respectively by the ports V01 and V02 of AND gate circuit with power-up period, passes through full bridge driving circuit D₀It obtains The control waveform for output waveform of powering controls the state of the switching tube in inverter circuit.IRF series can be selected in full-bridge driving chip Chip, such as IRF2184, IRF2186.Two groups of Q1, Q4 and Q2, Q3 switching tube alternate conductions.By the voltage warp of inverter circuit output High frequency pulse booster is crossed, the primary of transformer is Lp, and secondary is Ls, and transformer secondary output output is exactly PDM high pressure activation power supplys Output.PDM high pressure activation power supplys export the duty ratio of supply waveform by the duty ratio of high level in Power Regulation period control waveform Control.The duty ratio that high level in waveform is controlled by change, can adjust the number of power-up period in the supply waveform of output, Change for electric flux.

Such as Figure 19, the duty ratio of power-on time can be adjusted by following procedure in the Power Regulation period：By triangular wave with can straighten Galvanic electricity presses V_adjBy voltage comparator, when the level of triangular wave is higher than V_adj, comparator exports high level, when the level of triangular wave Less than V_adj, comparator exports low level, the control waveform of the output waveform of comparator as the Power Regulation period.So passing through change V_adjSize, the duty ratio of power-up period in the Power Regulation period can be controlled, to change for electric flux.

If Figure 20 is the circuit diagram for generating Power Regulation cycle control signal.Schmidt trigger G₁Production for impulse waveform It is raw, V_DACDirect current biasing as Schmidt trigger, thus it is possible to vary capacitance C_tThe charge and discharge time, to change Schmidt touch Send out the square wave frequency that device generates.

Above formula indicates the input/output relation of Schmidt trigger, V_iIndicate the input voltage of Schmidt trigger, V_DACIt is The direct current biasing of Schmidt trigger, V_oIt is output voltage, t is capacitance C_tCharging time.

The impulse waveform that Schmidt trigger generates is passed through into d type flip flop D₁It is 50% to generate a stable duty ratio Square wave.Square-wave signal is generated into triangular signal, the variable DC voltage V with generation by triangle wave generating circuit again_adjPass through Voltage comparator, output Power Regulation period control waveform.So by master system change circuit in MCU special pins it is defeated Go out signal, changes V_adjVoltage, thus it is possible to vary the duty ratio of Power Regulation cycle control signal, so that it may with reach change reactor supply The purpose of electric flux.

Master system is connected by USB, I2C or SPI interface with PDM high pressure activation power supplys, with the change of condition of power supply Change, master system according to the data detected to being calculated for electric flux, in conjunction with spectral intensity to quantum yield efficiency Than being assessed.Best E is found during adjusting for electric flux using newton hill-climbing algorithm_erCorresponding power-up period accounts for Sky compares range.Power-up period is monitored in real time in system operation, the frequency of supply of PDM high pressure activation power supplys is adjusted Control changes a Power Regulation cycle T by adjusting Power Regulation cycle control signal_m,jMiddle power-up period T_on,jDuty ratio D_j, make reaction Device is maintained at for electric flux within the scope of best effort.

Preferably, it is to change supply voltage frequency to change discharging condition, that is, changes strength of discharge, PDM high pressure activation power supplys With DBD reactor groups at series resonant tank, power-up period T is adjusted_d,i, system is made to be operated in resonance match point, i.e. PDM high pressures The frequency of supply of excitation power supply is identical as the resonant frequency of system.

PDM high pressure activations power supply and DBD reactor groups are at series resonant tank.Assuming that the resonance electricity in high pressure activation power supply Inductance value is L, and the equivalent capacitance value of DBD reactors is C, and the impedance Z in circuit is：

Wherein R is the resistance value in circuit, and ω L are the induction reactance in power supply,For the capacitive reactance of reactor.When meeting following item When part, circuit is presented purely, reaches series resonance.

Due to

ω₀=2 π f₀

Resonant frequency f₀It is expressed as:

In dielectric barrier discharge, with the progress of discharge process, the equivalent capacity of reactor can change.Due to holding Property reactor and perception excitation power supply between there are matching relationships, when the equivalent capacity of reactor changes, DBD is anti- Device and the matching properties of PDM high pressure activation power supplys is answered to decline.Input voltage in PDM high pressure activation power supplys is identical, The high pressure activation voltage peak that PDM high pressure activation power supplys generate can reduce, i.e., the supply voltage being injected into originally on reactor subtracts It is small, and only when the resonant frequency of the frequency of supply of power supply and electrode is closer, discharge effect is just better.Master system at this time The frequency of supply for just needing adjusting PDM high pressure activation power supplys, to improve the supply voltage of dielectric barrier discharge DBD reactors, The strength of discharge for improving reactor, makes system be operated in best E_erIn range.

When reactor equivalent capacity C changes, the natural resonance frequency f of system₀It changes, needs to adjust electricity at this time The frequency of supply in source, when the frequency of supply of PDM high pressure activation power supplys is identical as the resonant frequency of system, supply voltage is maximum, For electric flux maximum.And in the present system, the change of frequency of supply can directly pass through T_d,iVariation observation, therefore, when C send out When raw change, change T_d,iThe matching effect that power supply and reactor can be changed, to change discharge condition.According to Figure 16 institutes The newton hill-climbing algorithm shown, abscissa are frequency of supply, and ordinate is the transfer efficiency E of PDM power supplys_T/E_IN, adjust power supply frequency Rate finds best PDM power supply conversion efficiencies range according to newton hill-climbing algorithm, determines resonance center frequeH f₀.All puts In electrical parameter, the resonance center frequeH f of PDM power supplys is determined at first₀, other discharging conditions are all in the determination of resonance center frequeH In the case of regulated and controled.

In PDM high pressure activation power supplys, control signal principle figure such as Figure 21 of power-up period, in circuit operation principle and Figure 20 It is described identical, by changing V_DAC1Adjust the frequency of power-up period control signal.So changing V_DAC1, power-up period control signal Frequency change, so that it may with adjust PDM high pressure activation power supplys output supply voltage in T_d,i, reach for changing circuit With state, change the purpose of discharge effect.In system work process, master system is according to the data quantum yield detected Energy Efficiency Ratio E_erIt is assessed.To the power-up period T of reactor_d,iIt is adjusted, system is made to be operated in resonance match point.

Claims

1. a kind of parameter regulator control system of PDM power drives DBD air purifiers, which is characterized in that including DBD reactors, can Program power supply, PDM high pressure activations power supply, reactor power supply ENERGY E_TDetection unit, relative spectral power detection unit, quilt Gas concentration detection unit, gas flow rate adjustment unit and data acquisition and regulation and control unit are surveyed, wherein：

Programmable power supply, is connected with PDM high pressure activation power supplys, the input voltage for setting PDM high pressure activation power supplys, into And it includes PDM high to control PDM high pressure activation power supplys to be supplied to the supply voltage of reactor and the power of discharge system, discharge system Press excitation power supply and DBD reactors；

PDM high pressure activation power supplys, are connected with DBD reactors, as the excitation power supply of DBD reactors, for adjusting discharging condition；

Reactor power supply ENERGY E_TDetection unit is connected with DBD reactors, the electric parameter of detecting system is used for, by data transmission It is acquired to data and regulates and controls unit, obtain reactor power supply ENERGY E_T；

Relative spectral power detection unit is connected with DBD reactors, for detecting active specy emission spectrum in region of discharge Relative intensity, and transfer data to data acquisition and regulation and control unit；

Tested gas concentration detection unit is to detect the sensor of air quality, is located at the gas outlet of DBD reactors, for examining Purified air quality is surveyed, and transmits data to data acquisition and regulation and control unit；

Gas flow rate adjustment unit is located at the air inlet of DBD reactors, the signal for receiving data acquisition and regulation and control unit Adjust gas flow rate；

Data acquire and regulate and control unit, for receiving reactor power supply ENERGY E_TIt is the electric parameter data of detection unit transmission, opposite What the active specy relative spectral power signal of spectral intensity detection unit transmission and tested gas concentration detection unit were transmitted Air quality data handles data in real time, assesses the working condition of DBD reactors, to programmable power supply, PDM High pressure activation power supply and gas flow rate carry out real-time control.

2. the parameter regulator control system of PDM power drives DBD air purifiers according to claim 1, which is characterized in that anti- Answer device power supply ENERGY E_TDetection unit includes high voltage attenuator, current transformer, voltage sensor and digital oscilloscope, high electricity Pressure attenuator is connected to the high-voltage output end of PDM high pressure activation power supplys, measures the supply voltage of DBD reactors；Current transformer It is connected on the ground wire in circuit, measures the discharge current for flowing through entire circuit；Include that one end connects in the discharge loop of DBD reactors The integrating capacitor of ground wire obtains the integral voltage in integrating capacitor by voltage sensor.

3. the parameter regulator control system of PDM power drives DBD air purifiers according to claim 2, which is characterized in that high Voltage attenuator uses capacitance partial pressure method, and the high-voltage signal that PDM high pressure activation power supplys export is converted into low voltage signal input To the supply voltage acquisition channel interface of digital oscilloscope.

4. the parameter regulator control system of PDM power drives DBD air purifiers according to claim 2, which is characterized in that electricity Current transformer is the uniform close air core solenoid being wound on annular nonmagnetic skeleton, and output voltage is proportional to tested electric current, will The discharge current acquisition channel interface for the voltage signal access digital oscilloscope that current transformer senses.

5. the parameter regulator control system of PDM power drives DBD air purifiers according to claim 1, which is characterized in that phase It is fiber spectrometer to spectral intensity detection unit, the optics that transition of electronic energy generates is occurred into for active specy in discharge process Signal is converted into electric signal and acquires and regulate and control unit electric signal transmission to data, is transferred data to by data acquisition port Host computer.

6. the parameter regulator control system of PDM power drives DBD air purifiers according to claim 1, which is characterized in that number It is located in host computer according to acquisition and regulation and control unit, supply voltage, discharge current and the integral voltage signal three detected is electrical Parameter is acquired by digital oscilloscope, and host computer is transferred data to by digital oscilloscope.

7. a kind of parameter of PDM power drives DBD air purifiers regulates and controls method, which is characterized in that include the following steps：

(1) discharging condition of PDM high pressure activation power supplys, including supply voltage, frequency of supply, the frequency in Power Regulation period, tune are set The duty ratio of power-on time in the work(period；

(2) in discharge process, activity in discharge current, supply voltage, integral voltage and the region of discharge of DBD reactors is detected The relative spectral power of species will carry out former in discharge current, supply voltage and integral voltage signal transmission to digital oscilloscope Beginning data acquire；

(3) utilize data transmission interface and interactive software that digital oscilloscope and fiber spectrometer are connected with host computer respectively, The initial data that acquisition is stored on host computer obtains related discharge parameter by being calculated and handled in host computer, and by result Output display；

(4) it assesses to obtain corresponding discharging condition and gas flow rate in optimal discharge effect according to discharge effect, determines parameter Range；

(5) host computer is according to opposite quantum yield Energy Efficiency Ratio E_erDischarging condition or gas flow rate are adjusted in real time, make reactor work Make in best opposite quantum yield Energy Efficiency Ratio E_erIn neighbouring threshold range.

8. the parameter of PDM power drives DBD air purifiers according to claim 7 regulates and controls method, which is characterized in that step Suddenly in (3) to data carry out calculate and processing step be followed successively by supply voltage processing, discharge current processing, power supply energy balane, Equivalent parameters calculates and opposite quantum yield Energy Efficiency Ratio calculates, when respectively obtaining supply voltage peak-to-peak value, effectively discharging total Between, in average micro discharge intensity, system operation time always for electric flux, single power-up period average energy, the equivalent electricity of reactor Hold, opposite quantum yield Energy Efficiency Ratio.

9. the parameter of PDM power drives DBD air purifiers according to claim 8 regulates and controls method, which is characterized in that supply Piezoelectric voltage is detected by high voltage attenuator using capacitance partial pressure method, and high voltage signal, which is converted into low voltage signal, to carry out Acquisition, formula are as follows：

Wherein, U_C2For CH₁Hold collected voltage, CH₁Indicate the supply voltage acquisition channel interface of digital oscilloscope, U is tested VR_HThe voltage at end, VR_HThe High voltage output terminal voltage of PDM high pressure activation power supplys, i.e. DBD reactors high voltage supply terminal voltage, C₁ And C₂For the capacitance of high-voltage capacitance；According to the data for the supply voltage acquisition channel for acquiring and storing in real time in host computer, conversion Output is shown for the peak-to-peak value of actual power voltage.

10. the parameter of PDM power drives DBD air purifiers according to claim 8 regulates and controls method, which is characterized in that Average micro discharge intensity and effectively electric discharge total time is calculated in discharge current process part, the specific steps are：

101) discharge current is detected by current transformer；

102) discharge current waveform is reconstructed, obtained discharge current waveform is called into sgolayfilt letters in MATLAB Number, is smoothed using Savitzky-Golay smoothing algorithms；

103) original discharge current waveform subtracts each other with the current waveform that smoothing processing is crossed, and obtains the micro discharge electricity in discharge process The Wave data of stream；

104) electric discharge initial time and the electric discharge deadline of each power-up period are obtained according to the Wave data of micro discharge electric current, Electric discharge deadline and initial time subtraction calculations of discharging go out effective discharge time of single power-up period, i.e., are sent out on current waveform Effective discharge time of all power-up periods is added up and is effectively discharged total time by the time of raw micro discharge；

105) the micro discharge peak value of pulse of each power-up period is obtained according to the Wave data of micro discharge electric current, calculates discharge process In average micro discharge intensity, average micro discharge intensity is of the sum of peak value of all micro discharge pulses divided by micro discharge pulse Number；

11. the parameter of PDM power drives DBD air purifiers according to claim 8 regulates and controls method, which is characterized in that It is obtained in system operation in single power-up period average energy and system operation time always for electric flux by energy balane of powering, Specially：

112) lissajous figures of each reconstruct are powered with the integral and calculating of voltage and integral voltage, obtains lissajous figures Area S_d,i, the ENERGY E of single power-up period is obtained in conjunction with formula_d,i

Wherein u_m(t) refer to integral voltage, C_mFor the capacitance of external integrating capacitor, T_d,iIndicate the time of single power-up period, u (t) For supply voltage, i (t) is supply current, and subscript d, i indicate the number of power-up period；

One Power Regulation cycle T_m,jInterior power-up period number n_dm,jFor

Wherein n_dm,jIt is a Power Regulation cycle T_m,jInterior power-up period number, D_jIt is a Power Regulation cycle T_m,jMiddle power-on time Duty ratio, subscript m, j indicate the cycle times of power density adjustment；

The average power supply ENERGY E of single power-up period_d,aFor

The gross energy E of system consumption in run time_TFor

12. the parameter of PDM power drives DBD air purifiers according to claim 11 regulates and controls method, which is characterized in that According to supply voltage is obtained and integral voltage carries out the lissajous figures reconstruct of single power-up period, using integral voltage as abscissa Data, supply voltage are that ordinate data carry out figure reconstruction, obtain the lissajous figures that all power-up periods stack, and are carried out single A cycle graph separation, it is single lissajous figures to keep single power-up period corresponding, single power-up period Wave data separation Detailed process is as follows：

121) supply voltage, supply current, integral voltage data are read, the supply voltage maximum of points pair in memory length is found out The abscissa t answered_aAbscissa t corresponding with supply voltage minimum point_b, in the discharge waveform of PDM high pressure activation power supplys, power supply Voltage max and minimum value are adjacent two extreme points, the corresponding abscissa t of supply voltage maximum of points_aAnd supply voltage The corresponding abscissa t of minimum point_bBetween be divided into the time T of half of power-up period_d,i/2；

122) the corresponding abscissa t of selection supply voltage maximum of points_aAbscissa t corresponding with supply voltage minimum point_bHorizontal seat Mark midpoint x_i, from midpoint x_iCorresponding coordinate starts, and abscissa successively decreases half of power-up period, after successively decreasing every time, to the point after successively decreasing Judge into line slope, if slope is more than setting thresholding, indicate the coordinate points in power supply process, continues to successively decrease until slope is less than Set thresholding；If slope is less than setting thresholding, then it represents that the point is not in power supply process；

123) it is less than the point of setting thresholding for slope, is denoted as suspicious starting point p, last of setting thresholding is more than for slope It is a, it is denoted as q, starting point is chosen using dichotomy in (p, q) range：

If (b) slope is less than setting thresholding, using the midpoint abscissa as the p of next range points, otherwise by the horizontal seat in the midpoint It is denoted as the q points for next range；

(c) repeat (a) (b) until siding-to-siding block length be less than setting thresholding, if p, q siding-to-siding block length be less than setting thresholding, then at this time (p, Q) midpoint is starting point, and the abscissa of starting point is s；

124) since starting point, the abscissa of supply current is incremented by T_d,i/ 2 length carries out the point after being incremented by every time oblique Rate judges, if slope is more than setting thresholding, abscissa continues to be incremented by until slope is less than setting thresholding；Slope is less than and is set The point for determining thresholding is denoted as suspicious terminating point v, the last one point of setting thresholding is more than for slope, u is denoted as, in (u, v) range It is interior to choose terminating point using dichotomy；

125) in the range of starting point is to terminating point, since starting point, each T_d,iLength range is a power supply week Phase respectively stores the coordinate of each point in each single power-up period, completes supply voltage, supply current, integral electricity Press the separation of data.

13. the parameter of PDM power drives DBD air purifiers according to claim 8 regulates and controls method, which is characterized in that The equivalent capacity parameter of dielectric barrier discharge DBD reactors is calculated by equivalent parameters, according to supply voltage and integral electricity Pressure carries out the lissajous figures reconstruct of single power-up period, and four apex coordinates of lissajous figures are respectively A (U_x1,U_y1)、B (U_x2,U_y2)、C(U_x3,U_y3)、D(U_x4,U_y4), the abscissa and ordinate on each vertex are respectively the integral electricity on corresponding time point Pressure and supply voltage, the equivalent capacity data of single power-up period are obtained by following formula

Wherein C, C_dAnd C_gIt is the total equivalent capacity, medium equivalent capacity and discharging gap equivalent capacity of single power-up period respectively；

14. the parameter of PDM power drives DBD air purifiers according to claim 8 regulates and controls method, which is characterized in that According to collected relative spectral power data and the Power Regulation period-power-supplying ENERGY E being calculated_m,j, calculated by following formula Obtain opposite quantum yield Energy Efficiency Ratio.

15. the parameter of PDM power drives DBD air purifiers according to claim 7 regulates and controls method, which is characterized in that Discharge effect assessment is to utilize climbing hill algorithm, using the discharging condition in Power Regulation period or gas flow rate as horizontal axis, PDM power supplys Transfer efficiency or opposite quantum yield Energy Efficiency Ratio E_erFor the longitudinal axis, by the discharging condition or gas flow rate of constantly regulate system come Compare opposite quantum yield Energy Efficiency Ratio E in the front and back dielectric barrier discharge DBD reactors of adjustment_erSituation of change, further according to change Change situation makes reactor be operated in best opposite quantum yield Energy Efficiency Ratio E to adjust discharging condition or gas flow rate_erNeighbouring In threshold range.

16. the parameter of PDM power drives DBD air purifiers according to claim 15 regulates and controls method, which is characterized in that It is the supply voltage peak value for changing PDM high voltage power supplies and being supplied to DBD reactors to change discharging condition, and specially master system can It programs power supply to be connected, the output voltage of programmable power supply is adjusted from original state, the output electricity of programmable power supply The input voltage as PDM high pressure activation power supplys is pressed, DC/DC transformation is first passed through, obtains the variable high-voltage dc voltage of amplitude, it is high Pressure DC voltage obtains alternating voltage by full bridge inverter, using step-up transformer, obtains required output voltage； Master system uses newton hill-climbing algorithm, during adjusting supply voltage, finds best opposite quantum yield efficiency Compare E_erCorresponding power supply voltage range, by being carried to the real-time monitoring that may be programmed power supply to change PDM high pressure activation power supplys The supply voltage for supplying DBD reactors makes opposite quantum yield Energy Efficiency Ratio E_erIt is maintained in optimum range.

17. the parameter of PDM power drives DBD air purifiers according to claim 15 regulates and controls method, which is characterized in that The duty ratio for adjusting power-on time in a Power Regulation period, changes power density, changes PDM power supplys and is supplied to DBD reactors Power-up period number.

18. the parameter of the PDM power drives DBD air purifiers described in 15 is wanted to regulate and control method according to right, which is characterized in that change Become discharging condition to change supply voltage frequency, PDM high pressure activations power supply and DBD reactor groups into series resonant tank, adjusts Power-up period T_d,i, as change frequency of supply, system made to be operated in resonance match point, i.e. the power supply frequency of PDM high pressure activations power supply Rate is identical as the resonant frequency of system.