CN110364061A - Mould electricity number audio-visual education programme experimental circuit and method - Google Patents
Mould electricity number audio-visual education programme experimental circuit and method Download PDFInfo
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Abstract
From application routine, application routine is decomposed into mould electricity number audio-visual education programme experimental circuit, mould electricity number audio-visual education programme experimental circuit includes: amplifier waveform convertion circuit, analog-to-digital circuit, Digital Logic translation circuit；Amplifier waveform convertion circuit selects shift capacitor, shifting resistance and initial sinusoids wave frequency rate, can change Phase advance angle by changing adjusting resistance, amplifier waveform convertion circuit builds circuit after previewing, observe original sine wave and Phase advance sine wave；Analog-to-digital circuit builds circuit after previewing, observe original sine wave and the transformed original square wave of Phase advance sine wave and Phase advance square wave；According to application routine, Digital Logic translation circuit builds circuit after previewing, and observes logical waveform figure.Compared with prior art, the present invention has unified the application of analog circuit and digital circuit, and easily-learned easily mastered is studied in order to practise.
Description
Technical field
The present invention relates to a kind of mould electricity number audio-visual education programme experimental circuit and methods, are specifically guiding, system with application routine
One analog circuit and digital circuit, theory with practice, the mould electricity number audio-visual education programme experimental circuit and method studied in order to practise.
Background technique
" analogue and digital circuit " is the required specialized course of electric class undergraduate, and experimental courses include: to be familiar with laboratory apparatus
And the measurement of the devices such as hardware platform, BJT and MOS basic parameter, Design of Amplification Circuit, Design of Digital Circuit.Experimental courses purpose
It is to make student on the basis of study " circuit base ", platform experiment and electronics technology introduction course, supplement and raising mould
The quasi- comprehensive application ability with digital circuit, the thinking and experimental method of training science, the experimental ability of training student, and make to learn
Raw to grasp basic experimental method and experimental skill, the specialized courses to study later in depth is laid a solid foundation.
Experiment Course Design has very big problem at present: content design is outmoded, not enough grows with each passing hour, and student completes experiment to general
It is little to carry out academic and scientific research development use." analogue and digital circuit " experimental courses design the teaching method with innovative thinking
And the content of courses, be based on two core concepts: test based on one has subjective initiative as far as possible, and student more want by basis
Seek autonomous Design, rather than after a fashion, experiment content there are certain opening, give it is positive, learn mechanics of having a surplus
Raw expressive space；Second, introducing experiment content with reference to newest all kinds of university student's design of electronic circuits contests in real time, guarantee
Experiment content grows with each passing hour, and is obviously improved the autonomous Design ability of student.
Application routine.Damp oscillatory wave (DAC) detection technique is that one kind that recent domestic is paid close attention to is used for high pressure
The new technique of electric power equipment on-site insulating properties detection and diagnosis, the country is in the field tests such as cable, transformer, reactor
Practical application is carried out, scene discovery and anatomy verification achieve good because of all kinds of defects caused by manufacture, laying, installation
Effect.It is confined to existing technology, it is exhausted under damped oscillation wave voltage only to have carried out power distribution network medium voltage electricity equipment at present
The field application of edge performance detection and diagnosis, and the research of super-pressure, extra-high voltage electric power equipment and application also have technical bottleneck,
Relevant experience and data lack completely.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, a kind of mould electricity number audio-visual education programme experimental circuit is proposed
And method, an application routine is provided to student, analog circuit and digital circuit experiment are decomposited from application routine, rather than
Theoretical Hardware is rested on to realize.
The present invention is achieved by the following technical solutions, and mould electricity number audio-visual education programme experimental circuit includes: amplifier waveform convertion
Circuit, analog-to-digital circuit, Digital Logic translation circuit, amplifier waveform convertion circuit turn for converting analog waveform, simulation
Digital circuit is for converting analog waveforms into digital signal, and Digital Logic translation circuit is for converting digital signal；Its feature
It is input of the simulation output waveform of waveform convertion circuit as analog-to-digital circuit, the output number of analog-to-digital circuit
Input of the word signal as Digital Logic translation circuit.
The original sine wave of input is carried out Phase advance transformation, output are as follows: original by the amplifier waveform convertion circuit
Sine wave and Phase advance sine wave；Amplifier waveform convertion circuit includes: operational amplifier, adjusts resistance, shifting resistance, phase shift
Capacitor, three terminals of operational amplifier are as follows: amplifier positive input terminal, amplifier negative input end, amplifier output end；Resistance both ends are adjusted to connect
Connect amplifier negative input end, amplifier output end；Shifting resistance is connected with shift capacitor, and resistance terminal is connected with amplifier negative input end, electricity
Rong Duan ground connection；Amplifier positive input terminal is connected with the original sine wave of input, and amplifier output end is Phase advance sine wave.
Original sine wave Phase advance angle are as follows: adjust the sum of resistance shifting resistance, initial sinusoids wave frequency rate, shift capacitor
The arc tangent function value of three's product subtracts the arc tangent letter of shifting resistance, initial sinusoids wave frequency rate, shift capacitor three's product
Numerical value；The Phase advance time are as follows: Phase advance angle is multiplied by initial sinusoids wave period, then divided by 2 π.
Amplifier waveform convertion circuit selects shift capacitor, shifting resistance and initial sinusoids wave frequency rate, adjusts electricity by changing
Resistance can change Phase advance angle；In experiment, initial sinusoids wave frequency rate selection 1kHz-30kHz is advisable, shift capacitor selection
22pF-10nF is advisable, and shifting resistance selection 1k Ω -10k Ω is advisable, and adjusting resistance selection 10k Ω -100k Ω is advisable.
It is required that student's column write the calculating process of Phase advance angle and Phase advance time；It is required that student is building amplifier wave
Before fractal transform circuit, selects shift capacitor, shifting resistance, adjusts resistance and initial sinusoids wave frequency rate, calculate Phase advance
Angle and Phase advance time meet given Phase advance requirement, and obtain original sine wave and phase in simulation software
The waveform of position Forward sine wave, measures the Phase advance time.
The original sine wave of input and Phase advance sine wave are all transformed to square wave by the analog-to-digital circuit,
Output are as follows: the Phase advance square wave of the original square wave of initial sinusoids wave conversion, the sinusoidal wave conversion of Phase advance；Analog-to-digital
Sine wave is converted to square wave by comparator circuit by circuit；Analog-to-digital circuit includes: comparator 1 and comparator 2, is compared
1 three terminals of device are as follows: positive input terminal 1, negative input end 1, output end 1,2 three terminals of comparator are as follows: positive input terminal 2, negative input
Hold 2, output end 2；Negative input end 1 and negative input end 2 are grounded, and positive input terminal 1 connects original sine wave, and output end 1 is original square wave,
Positive output end 2 connects Phase advance sine wave, and output end 2 is Phase advance square wave.
Comparator is divided into open-drain output comparator, open collector output comparator, push-pull output comparator, compares
Device selects open-drain output comparator and/or open collector output comparator, requires pull-up voltage by pull-up resistor
It is connect with comparator output terminal, the selection of pull-up resistor will be according to the output end current limliting in upper pull-up voltage and comparator databook
Value, upper pull-up voltage are less than output end cut-off current divided by pull-up resistor.
It is required that student checks the databook of selected comparator, pull-up voltage and pull-up resistor in determination, and illustrates and compare
The working principle of device.
Analog-to-digital circuit, it is desirable that student according to the internal structure map analysis in comparator databook why current collection
Pole open circuit output comparator and/or open-drain output comparator need pull-up voltage and pull-up resistor；The selection of pull-up resistor
To be less than output end divided by pull-up resistor according to the output end cut-off current in upper pull-up voltage and comparator databook, upper pull-up voltage
Cut-off current；Push-pull output comparator is selected, then can put question to the realization principle of push-pull output comparator.
The original square wave of input and Phase advance square wave are carried out logical conversion by the Digital Logic translation circuit；Number
Word logic conversion circuit can also increase digital input signals, with original square wave and Phase advance square wave together as input signal
Carry out logical conversion.
The first logical conversion is that original square wave and Phase advance square wave carry out XOR logic and convert to obtain dead zone waveform；The
Two kinds of logical conversions are original square wave and Phase advance square wave carries out and logical conversion；The third logical conversion is alogical original
Beginning square wave, alogical Phase advance square wave carries out and logical conversion；4th kind of logical conversion is original square wave or Logic Phase
NOT logic transformation after Forward square wave；5th kind of logical conversion is original square wave, alogical dead zone waveform carries out and logic becomes
It changes；6th kind of logical conversion is Phase advance square wave, alogical dead zone waveform carries out and logical conversion；7th kind of logical conversion
For alogical original square wave, alogical dead zone waveform carries out and logical conversion；8th kind of logical conversion be original square wave or
NOT logic transformation after the waveform of logic dead zone；9th kind of logical conversion is alogical Phase advance square wave, alogical dead zone
Waveform carries out and logical conversion；Tenth kind of logical conversion is the NOT logic transformation after Phase advance square wave or logic dead zone waveform.
The Training Methodology of mould electricity number audio-visual education programme experimental circuit, characterized in that from application routine, application routine is decomposed
For mould electricity number audio-visual education programme experimental circuit, mould electricity number audio-visual education programme experimental circuit includes: amplifier waveform convertion circuit, analog-to-digital electricity
Road, Digital Logic translation circuit；Amplifier waveform convertion circuit selects shift capacitor, shifting resistance and initial sinusoids wave frequency rate, leads to
Phase advance angle can be changed by crossing change adjusting resistance, and amplifier waveform convertion circuit builds circuit after previewing, observation is original just
String wave and Phase advance sine wave；Analog-to-digital circuit builds circuit after previewing, observing original sine wave and Phase advance just
Original square wave and Phase advance square wave after string wave conversion；According to application routine, Digital Logic translation circuit builds electricity after previewing
Logical waveform figure is observed on road.
Amplifier waveform convertion circuit previews requirement: student arranges the calculating for writing Phase advance angle and Phase advance time
Journey, it is desirable that student before building amplifier waveform convertion circuit, select shift capacitor, shifting resistance, adjust resistance and it is original just
String wave frequency rate calculates Phase advance angle and Phase advance time, meets given Phase advance requirement, and soft emulating
The waveform that original sine wave and Phase advance sine wave are obtained in part measures the Phase advance time；Analog-to-digital circuit previews
It is required that: student according to the internal structure map analysis in comparator databook why open collector output comparator and/or
Open-drain output comparator needs pull-up voltage and pull-up resistor, and the selection of pull-up resistor will be according to upper pull-up voltage and comparator
Output end cut-off current in databook, upper pull-up voltage are less than output end cut-off current divided by pull-up resistor；Select push-pull output ratio
Compared with device, then the realization principle of push-pull output comparator can be putd question to；Digital Logic translation circuit previews requirement: student is according to application
The description of routine draws logical waveform figure, writes out logic true value table according to logical waveform figure, writes Karnaugh map to logic true value table column
Equation abbreviation obtains logical expression, gate circuit logic diagram is drawn according to logical expression, according to gate circuit logic diagram
It models, run, the logical waveform figure emulated in simulation software.
Selected application routine are as follows: electric power alternating wave generator；Electric power alternating wave generator includes: adjustable type direct current
Source, first switch device, second switch device, resonant inductance, tested power equipment, adjustable type DC power anode side, the
One switching device, resonant inductance, tested power equipment high-pressure side are sequentially connected in series, and tested power equipment ground side and
Adjustable type DC power cathode flanks ground, in parallel with second switch device after connecting with resonant inductance, tested power equipment to connect
It connects；The boost process of electric power alternating wave generator: the first stage is boosting oscillatory regime, and oscillating current is positive by sinusoidal just half
Cycle deformation, when oscillating current is zero, first switch break-over of device, second switch device shutdown, adjustable type DC power supply to
Tested power equipment charging, until oscillating current is zero to enter NextState again；Second stage is free-running operation, vibration
Swinging electric current is reversely to change by sinusoidal negative half period waveform, when oscillating current is zero, the shutdown of first switch device, second switch device
Conducting is tested power equipment and resonant inductance and is formed into a loop damped oscillation, until oscillating current is zero to enter next shape again
State；First stage boosting oscillatory regime and second stage free-running operation are repeated, the oscillation wave at power equipment both ends is tested
Voltage magnitude constantly increases, until reaching setting value；The turn-on and turn-off of first switch device and second switch device be all
Oscillating current zero crossing carries out, due to delay, if will be in oscillating current ILZero crossing switches switching device state, to oscillation electricity
Zero point pretreatment is flowed through, move forward an angle, and the influence of delay is offset with this；First switch device and second switch device are not
It may simultaneously turn on, one of them conducting, another is just necessarily turned off, and the driving signal of the two is on the contrary, to avoid turning off
It is short because delay issue two switching devices of appearance simultaneously turn on when previous switching device and opening the latter switching device
A dead zone is arranged in two the intermediate of switch device switches state in road；It is cut with the waveform pass zero point of oscillating current Phase advance
Switching device is changed, using the Phase advance time as the dead zone of two switching devices；According to oscillating current waveform, oscillating current phase
The waveform of Forward obtains the first switch device drive waveform of dead zone waveform and boost process, second switch device drive waveform；
Amplifier waveform convertion circuit is used for oscillating current Phase advance；Analog-to-digital circuit is used for oscillating current waveform, oscillation
The waveform of current phase Forward is converted to digital signal square wave；Digital Logic translation circuit is according to oscillating current waveform, oscillation electricity
Square wave after flowing the waveform convertion of Phase advance obtains the first switch device drive waveform of dead zone waveform and boost process, second
Switching device drive waveforms.
Compared with prior art, the invention has the following advantages: first, give student provide an application routine, from
Application routine, which is set out, decomposes required analog circuit and digital circuit experiment；The second, analog circuit and digital circuit have been unified
Application；Third, easily-learned easily mastered, study in order to practise.
Detailed description of the invention
Fig. 1 is application routine: electric power alternating wave generator；
Fig. 2 is the logical waveform figure of application routine, the original square wave of A- oscillating current transformation, the transformation of B- Phase advance oscillating current
Phase advance square wave；
Fig. 3 is mould electricity number audio-visual education programme experimental circuit；
Fig. 4 is the truth table of the Digital Logic translation circuit of application routine.
Specific embodiment
Elaborate with reference to the accompanying drawing to the embodiment of the present invention: the present embodiment before being with technical solution of the present invention
It puts and is implemented, give detailed embodiment and process, but protection scope of the present invention is not limited to following embodiments.
Selected application routine are as follows: electric power alternating wave generator.
As shown in Figure 1, electric power alternating wave generator includes: adjustable type DC power supply UDC, first switch device S1, second open
Close device S2, resonant inductance Lr, tested power equipment Ctest, adjustable type DC power supply UDCSide of the positive electrode, first switch device S1、
Resonant inductance Lr, tested power equipment CtestHigh-pressure side is sequentially connected in series, and tested power equipment CtestGround side and tune
Section formula DC power supply UDCNegative side ground connection, with resonant inductance Lr, tested power equipment CtestAfter series connection with second switch device S2
It is connected in parallel.
The boost process of electric power alternating wave generator: the first stage is boosting oscillatory regime, oscillating current ILIt is pressed for forward direction
Sinusoidal positive half cycle waveform variation, oscillating current ILWhen being zero, first switch device S1Conducting, second switch device S2Shutdown is adjusted
Formula DC power supply UDCTo tested power equipment CtestCharging, until oscillating current ILBe again zero enter NextState；Second
Stage is free-running operation, oscillating current ILFor reversely by sinusoidal negative half period waveform variation, oscillating current ILWhen being zero, first
Switching device S1Shutdown, second switch device S2Conducting is tested power equipment CtestWith resonant inductance LrForming circuit damping vibration
It swings, until oscillating current ILBe again zero enter NextState；It repeats first stage boosting oscillatory regime and second stage is free
Oscillatory regime is tested power equipment CtestThe oscillating wave voltage U at both endsCAmplitude constantly increases, until reaching setting value.
First switch device S1With second switch device S2Turn-on and turn-off be all in oscillating current ILZero crossing carries out,
Due to factors such as sampling time, controller processing time, the delays of switching device driving signal, if will be in oscillating current ILZero passage
Point switching switching device state, is highly desirable to oscillating current ILZero crossing pretreatment, move forward an angle, is offset with this
The influence of delay.
First switch device S1With second switch device S2It can not simultaneously turn on, one of them conducting, another just must
So shutdown, and the two driving signal on the contrary, when to avoid turning off previous switching device and open the latter switching device because
There are two switching devices for delay issue to simultaneously turn on and short-circuit, is arranged one in two the intermediate of switch device switches states
Dead zone.
With oscillating current ILThe waveform I of Phase advanceSLZero crossing switches switching device, using the Phase advance time as two
The dead zone of switching device；According to oscillating current ILWaveform, oscillating current ILThe waveform I of Phase advanceSLObtain dead zone waveform and liter
Press through the first switch device S of journey1Drive waveforms, second switch device S2Drive waveforms.
From application routine, application routine is decomposed into mould electricity number audio-visual education programme experimental circuit.Application routine: electric power oscillation
The boost process of wave producer is just broken down into the mould electricity number audio-visual education programme experimental circuit in the present invention, mould electricity number electricity teaching experiment electricity
Road includes: amplifier waveform convertion circuit, analog-to-digital circuit, Digital Logic translation circuit.
Amplifier waveform convertion circuit is used for oscillating current ILPhase advance；Analog-to-digital circuit is used for oscillating current
ILWaveform, oscillating current ILThe waveform of Phase advance is converted to digital signal square wave；Digital Logic translation circuit is according to oscillating current
ILWaveform, oscillating current ILSquare wave after the waveform convertion of Phase advance obtains the first switch device of dead zone waveform and boost process
Part S1Drive waveforms, second switch device S2Drive waveforms.
Amplifier waveform convertion circuit is OP27G, oscillating current I using operational amplifierLIt is replaced with sine wave, it is desirable that student
Select the frequency of sine wave and accordingly shift circuit before designed phase, it is desirable that the Phase advance time is more than the 1/15 of sine wave period；
Analog-to-digital circuit uses open collector output comparator LM393, supply voltage 5V and ground, and upper pull-up voltage selects 5V, root
It is investigated that it is 4mA that LM393 databook, which obtains output end cut-off current, it is desirable that student selects suitable pull-up resistor.
Oscillating current I as shown in Figure 2LSinusoidal waveform and oscillating current ILThe sinusoidal waveform I of Phase advanceSL。
As shown in figure 3, amplifier waveform convertion circuit includes: operational amplifier AMP selection OP27G, adjusts resistance R, phase shift
Resistance Rv, shift capacitor C, tri- terminals of operational amplifier AMP are as follows: amplifier positive input terminal, amplifier negative input end, amplifier output
End；It adjusts the both ends resistance R and connects amplifier negative input end, amplifier output end；Shifting resistance Rv connects with shift capacitor C, resistance terminal
It is connected with amplifier negative input end, capacitance terminal ground connection；Amplifier positive input terminal is connected with the original sine wave of input, and amplifier output end is
Phase advance sine wave.
It is required that student's column write the calculating process of Phase advance angle and Phase advance time.
Sine wave freuqency isf, period T, Phase advance angle, φ are as follows: arctan [(R+Rv)fC]- arctan
(fCRv)；The Phase advance time are as follows: Φ T/2 πf。
Select sine wave freuqency for 15kHz, adjusting resistance R is 10.44k Ω, shifting resistance Rv is 5.36k Ω, phase shift electricity
Appearance C is 1nF, and it is 6us that the Phase advance time, which is calculated, meets 1/15 requirement of the Phase advance time more than sine wave period；
Simulation model is established in simulation software Mltisim, obtains simulation waveform.
The original sine wave of input and Phase advance sine wave are all transformed to square wave by the analog-to-digital circuit,
Output are as follows: the Phase advance square wave of the original square wave of initial sinusoids wave conversion, the sinusoidal wave conversion of Phase advance；Analog-to-digital
Sine wave is converted to square wave by comparator circuit by circuit；Analog-to-digital circuit includes: comparator 1 and comparator 2, is compared
1 three terminals of device are as follows: positive input terminal 1, negative input end 1, output end 1,2 three terminals of comparator are as follows: positive input terminal 2, negative input
Hold 2, output end 2；Negative input end 1 and negative input end 2 are grounded, and positive input terminal 1 connects original sine wave, and output end 1 is original square wave,
Positive output end 2 connects Phase advance sine wave, and output end 2 is Phase advance square wave.
Selected LM393 is open collector output comparator, and upper pull-up voltage selects 5V, according to looking into LM393 data hand
It is 4mA that volume, which obtains output end cut-off current, it is desirable that the value range of pull-up resistor is calculated in student；Be calculated pull-up resistor >
1.25k Ω selects 2 k Ω herein；According to the typical circuit in LM393 databook, passed through respectively in output end 1 and output end 2
It is grounded after 15pF capacitor.
Resistance R as shown in Figure 31And R2It is all pull-up resistor, resistance value is all 2 k Ω.
It is required that student according to the internal structure map analysis in LM393 databook why open collector output comparator
Need pull-up voltage and pull-up resistor.
If selecting open-drain output comparator, and so.
Push-pull output comparator is selected, then can put question to the realization principle of push-pull output comparator.
Application routine: electric power alternating wave generator, it is desirable that student draws according to the description of application routine and patrols is provided to student
Waveform diagram is collected, logic true value table is write out according to logical waveform figure, Karnaugh map equation abbreviation is write to logic true value table column and is patrolled
Expression formula is collected, gate circuit logic diagram is drawn according to logical expression, modeled in simulation software according to gate circuit logic diagram,
Operation, the logical waveform figure emulated.
As shown in figure 3, oscillating current ILThe square wave A obtained by comparator COM2, oscillating current ILThe sine of Phase advance
Waveform ISLThe square wave B obtained by comparator COM1.According to application routine: the description of electric power alternating wave generator, boost process,
The logic exclusive or that square wave A, square wave B, set dead zone waveform D are square wave A and square wave B converts, to draw switching device S1
And S2Drive waveforms, logical waveform is as shown in Figure 2.Logical waveform figure according to fig. 2, can write out logic true value table, such as Fig. 4
It is shown.Karnaugh map equation abbreviation is write to logic true value table column and obtains logical expression.
The original square wave of input and Phase advance square wave are carried out logical conversion by the Digital Logic translation circuit；The
A kind of logical conversion is that original square wave and Phase advance square wave carry out XOR logic and convert to obtain dead zone waveform；Second of logic becomes
It is changed to original square wave and Phase advance square wave carries out and logical conversion；The third logical conversion is alogical original square wave, non-
The Phase advance square wave of logic carries out and logical conversion；After 4th kind of logical conversion is original square wave or Logic Phase Forward square wave
NOT logic transformation；5th kind of logical conversion is original square wave, alogical dead zone waveform carries out and logical conversion；6th kind is patrolled
It collects and is transformed to Phase advance square wave, the progress of alogical dead zone waveform and logical conversion；7th kind of logical conversion is alogical
Original square wave, alogical dead zone waveform carries out and logical conversion；8th kind of logical conversion is original square wave or logic dead zone wave
NOT logic transformation after shape；9th kind of logical conversion be alogical Phase advance square wave, alogical dead zone waveform carry out with
Logical conversion；Tenth kind of logical conversion is the NOT logic transformation after Phase advance square wave or logic dead zone waveform.
As shown in figure 3, square wave A and square wave B, which carries out XOR logic, obtains dead zone D；Dead zone D and square wave B after NOT logic into
It is capable to obtain switching device S with logic1Drive waveforms；The NOT logic of square wave A or logic dead zone D convert to obtain switching device S2's
Drive waveforms.
Application routine of the invention is not limited to electric power alternating wave generator, additionally it is possible to shape be added in Digital Logic translation circuit
State variable, so that logical conversion is more complicated.
Claims (10)
1. a kind of mould electricity number audio-visual education programme experimental circuit includes: amplifier waveform convertion circuit, analog-to-digital circuit, Digital Logic change
Circuit is changed, amplifier waveform convertion circuit is for converting analog waveform, and analog-to-digital circuit is for converting analog waveforms into number
Word signal, Digital Logic translation circuit is for converting digital signal；It is characterized in that the simulation output waveform of waveform convertion circuit is made
For the input of analog-to-digital circuit, the output digit signals of analog-to-digital circuit are as the defeated of Digital Logic translation circuit
Enter.
2. mould electricity number audio-visual education programme experimental circuit according to claim 1, characterized in that the amplifier waveform convertion circuit
The original sine wave of input is subjected to Phase advance transformation, output are as follows: original sine wave and Phase advance sine wave；Amplifier waveform
Translation circuit includes: operational amplifier, adjusts resistance, shifting resistance, shift capacitor, three terminals of operational amplifier are as follows: amplifier
Positive input terminal, amplifier negative input end, amplifier output end；It adjusts resistance both ends and connects amplifier negative input end, amplifier output end；Phase shift
Resistance is connected with shift capacitor, and resistance terminal is connected with amplifier negative input end, capacitance terminal ground connection；The original of amplifier positive input terminal and input
Beginning sine wave is connected, and amplifier output end is Phase advance sine wave.
3. mould electricity number audio-visual education programme experimental circuit according to claim 2, characterized in that original sine wave Phase advance angle
Are as follows: the sum of resistance shifting resistance, initial sinusoids wave frequency rate, the arc tangent function value of shift capacitor three's product are adjusted, shifting is subtracted
Phase resistance, initial sinusoids wave frequency rate, the arc tangent function value of shift capacitor three's product；The Phase advance time are as follows: Phase advance
Angle is multiplied by initial sinusoids wave period, then divided by 2 π.
4. mould electricity number audio-visual education programme experimental circuit according to claim 1, characterized in that the analog-to-digital circuit,
The original sine wave of input and Phase advance sine wave are all transformed to square wave, exported are as follows: the original-party of initial sinusoids wave conversion
Wave, Phase advance sinusoidal wave conversion Phase advance square wave；Analog-to-digital circuit is turned sine wave by comparator circuit
It is changed to square wave；Analog-to-digital circuit includes: comparator 1 and comparator 2,1 three terminals of comparator are as follows: positive input terminal 1, bear it is defeated
Enter end 1, output end 1,2 three terminals of comparator are as follows: positive input terminal 2, negative input end 2, output end 2；Negative input end 1 and negative input
2 ground connection of end, positive input terminal 1 connect original sine wave, and output end 1 is original square wave, and positive output end 2 connects Phase advance sine wave, defeated
Outlet 2 is Phase advance square wave.
5. mould electricity number audio-visual education programme experimental circuit according to claim 4, characterized in that comparator selects open-drain output
Comparator and/or open collector output comparator require pull-up voltage and connect by pull-up resistor with comparator output terminal,
The selection of pull-up resistor will be according to the output end cut-off current in upper pull-up voltage and comparator databook, and upper pull-up voltage is divided by pull-up
Resistance is less than output end cut-off current.
6. mould electricity number audio-visual education programme experimental circuit according to claim 1, characterized in that the Digital Logic converts electricity
The original square wave of input and Phase advance square wave are carried out logical conversion by road；Digital Logic translation circuit can also increase number
Input signal carries out logical conversion together as input signal with original square wave and Phase advance square wave.
7. mould electricity number audio-visual education programme experimental circuit according to claim 6, characterized in that the first logical conversion is original-party
Wave and Phase advance square wave carry out XOR logic and convert to obtain dead zone waveform；Before second of logical conversion is original square wave and phase
Move square wave progress and logical conversion；The third logical conversion be alogical original square wave, alogical Phase advance square wave into
Capable and logical conversion；4th kind of logical conversion is the NOT logic transformation after original square wave or Logic Phase Forward square wave；5th kind
Logical conversion is original square wave, alogical dead zone waveform carries out and logical conversion；6th kind of logical conversion is Phase advance side
Wave, alogical dead zone waveform carries out and logical conversion；7th kind of logical conversion be alogical original square wave, alogical dead
Area's waveform carries out and logical conversion；8th kind of logical conversion is the NOT logic transformation after original square wave or logic dead zone waveform；The
Nine kinds of logical conversions are alogical Phase advance square wave, alogical dead zone waveform carries out and logical conversion；Tenth kind of logic
NOT logic transformation after being transformed to Phase advance square wave or logic dead zone waveform.
8. a kind of Training Methodology for the described in any item mould electricity number audio-visual education programme experimental circuits of claim 1 to 7, feature
It is, from application routine, application routine to be decomposed into mould electricity number audio-visual education programme experimental circuit, mould electricity number audio-visual education programme experimental circuit packet
It includes: amplifier waveform convertion circuit, analog-to-digital circuit, Digital Logic translation circuit；Amplifier waveform convertion circuit selects phase shift
Capacitor, shifting resistance and initial sinusoids wave frequency rate can change Phase advance angle by changing adjusting resistance, and amplifier waveform becomes
It changes after circuit previews and builds circuit, observe original sine wave and Phase advance sine wave；Analog-to-digital circuit is built after previewing
Circuit observes original sine wave and the transformed original square wave of Phase advance sine wave and Phase advance square wave；According to application examples
Journey, Digital Logic translation circuit build circuit after previewing, observe logical waveform figure.
9. the Training Methodology of mould electricity number audio-visual education programme experimental circuit according to claim 8, characterized in that amplifier waveform convertion
Circuit previews requirement: student arranges the calculating process for writing Phase advance angle and Phase advance time, it is desirable that student is building amplifier
Before waveform convertion circuit, selects shift capacitor, shifting resistance, adjusts resistance and initial sinusoids wave frequency rate, before calculating phase
Move angle and Phase advance time, meet given Phase advance requirement, and obtain in simulation software original sine wave and
The waveform of Phase advance sine wave measures the Phase advance time；Analog-to-digital circuit previews requirement: student is according to comparator number
According to the internal structure map analysis in handbook, why open collector output comparator and/or open-drain output comparator need
The selection of upper pull-up voltage and pull-up resistor, pull-up resistor will be according to the output end current limliting in upper pull-up voltage and comparator databook
Value, upper pull-up voltage are less than output end cut-off current divided by pull-up resistor；Push-pull output comparator is selected, then can put question to push-pull output
The realization principle of comparator；Digital Logic translation circuit previews requirement: student draws logical waveform according to the description of application routine
Figure, writes out logic true value table according to logical waveform figure, writes Karnaugh map equation abbreviation to logic true value table column and obtains logical expression
Formula draws gate circuit logic diagram according to logical expression, is modeled, is run in simulation software according to gate circuit logic diagram,
The logical waveform figure emulated.
10. the Training Methodology of mould electricity number audio-visual education programme experimental circuit according to claim 8, characterized in that selected to answer
With routine are as follows: electric power alternating wave generator；Electric power alternating wave generator includes: adjustable type DC power supply, first switch device,
Two switching devices, resonant inductance, tested power equipment, adjustable type DC power anode side, first switch device, resonance electricity
Sense, tested power equipment high-pressure side are sequentially connected in series, and tested power equipment ground side and adjustable type DC power supply are negative
Pole flanks ground, is connected in parallel after connecting with resonant inductance, tested power equipment with second switch device；Electric power oscillation wave occurs
The boost process of device: the first stage is boosting oscillatory regime, and oscillating current is positive by sinusoidal positive half cycle waveform variation, oscillation electricity
When stream is zero, first switch break-over of device, the shutdown of second switch device, adjustable type DC power supply are filled to tested power equipment
Electricity, until oscillating current be again zero enter NextState；Second stage is free-running operation, and oscillating current is reversed by just
The variation of string negative half period waveform, when oscillating current is zero, the shutdown of first switch device, second switch break-over of device are tested electric power
Equipment and resonant inductance are formed into a loop damped oscillation, until oscillating current is zero to enter NextState again；Repeat the first stage
The oscillating wave voltage amplitude of oscillatory regime of boosting and second stage free-running operation, tested power equipment both ends constantly rises
Height, until reaching setting value；The turn-on and turn-off of first switch device and second switch device are all in oscillating current zero crossing
It carries out, due to delay, if will be in oscillating current ILZero crossing switches switching device state, locates in advance to oscillating current zero crossing
Reason, move forward an angle, and the influence of delay is offset with this；First switch device and second switch device can not be led simultaneously
Logical, one of them conducting, another is just necessarily turned off, and the driving signal of the two is on the contrary, to avoid turning off previous switch
It is short-circuit because delay issue two switching devices of appearance simultaneously turn on when device and opening the latter switching device, it is opened at two
It closes the intermediate of device switching state and a dead zone is set；Switch switching device with the waveform pass zero point of oscillating current Phase advance,
Using the Phase advance time as the dead zone of two switching devices；According to oscillating current waveform, the waveform of oscillating current Phase advance
Obtain first switch device drive waveform, the second switch device drive waveform of dead zone waveform and boost process；Amplifier waveform becomes
Circuit is changed to be used for oscillating current Phase advance；Analog-to-digital circuit is used for will be before oscillating current waveform, oscillating current phase
The waveform of shifting is converted to digital signal square wave；Digital Logic translation circuit is according to oscillating current waveform, oscillating current Phase advance
Waveform convertion after square wave obtain the first switch device drive waveform of dead zone waveform and boost process, second switch device drive
Dynamic waveform.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111135478A (en) * | 2020-01-22 | 2020-05-12 | 哈尔滨理工大学 | A quasi-phase super-resolution circuit for respiratory motion signals on thoracic and abdominal surfaces |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050156665A1 (en) * | 2003-11-26 | 2005-07-21 | Yamaha Corporation | Class-D amplifier |
| CN200983562Y (en) * | 2006-12-14 | 2007-11-28 | 谢步明 | Converter dead area generation circuit |
| DE102007007662A1 (en) * | 2007-02-13 | 2008-08-14 | Andritz Küsters GmbH & Co. KG | Experimentation kit for electronic circuit for e.g. training purposes in e.g. school, has testing bridges switched on when light intensities are same at bridges such that positive voltage is provided to operational amplifier |
| CN202351312U (en) * | 2011-08-30 | 2012-07-25 | 刘闯 | Zero crossing point detecting circuit of high frequency resonance current |
| CN102801424A (en) * | 2012-09-03 | 2012-11-28 | 中国科学院微电子研究所 | Sigma-Delta modulator and analog-digital converter |
| CN104052487A (en) * | 2013-03-13 | 2014-09-17 | 英飞凌科技奥地利有限公司 | System and Method for an Oversampled Data Converter |
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
| CN104732842A (en) * | 2013-12-20 | 2015-06-24 | 重庆煌能科技有限公司 | Electronic technique theory and practice integration teaching system |
| CN204559408U (en) * | 2015-03-23 | 2015-08-12 | 广东美的制冷设备有限公司 | Intelligent power module |
| CN204857008U (en) * | 2014-12-31 | 2015-12-09 | 天津云控科技有限公司 | Multi -functional combined test case |
| CN105302019A (en) * | 2015-10-13 | 2016-02-03 | 电子科技大学 | An electro-optic modulator bias operating point control device and method |
| CN205317849U (en) * | 2015-12-25 | 2016-06-15 | 国网新疆电力公司乌鲁木齐供电公司 | Commercial power electric power parameter detecting system |
| CN205406667U (en) * | 2016-02-29 | 2016-07-27 | 大唐恩智浦半导体有限公司 | Battery management system's battery correcting unit |
| CN106602881A (en) * | 2017-01-25 | 2017-04-26 | 杭州士兰微电子股份有限公司 | Synchronous rectification control circuit, power converter and control method thereof |
| CN107370375A (en) * | 2017-07-19 | 2017-11-21 | 深圳芯智汇科技有限公司 | DC DC translation circuits current sample, current-sharing control method and circuit |
| CN107633749A (en) * | 2017-09-27 | 2018-01-26 | 昆明理工大学 | A kind of waveform produces and translation circuit experimental provision and application method |
-
2019
- 2019-07-12 CN CN201910631372.7A patent/CN110364061A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050156665A1 (en) * | 2003-11-26 | 2005-07-21 | Yamaha Corporation | Class-D amplifier |
| CN200983562Y (en) * | 2006-12-14 | 2007-11-28 | 谢步明 | Converter dead area generation circuit |
| DE102007007662A1 (en) * | 2007-02-13 | 2008-08-14 | Andritz Küsters GmbH & Co. KG | Experimentation kit for electronic circuit for e.g. training purposes in e.g. school, has testing bridges switched on when light intensities are same at bridges such that positive voltage is provided to operational amplifier |
| CN202351312U (en) * | 2011-08-30 | 2012-07-25 | 刘闯 | Zero crossing point detecting circuit of high frequency resonance current |
| CN102801424A (en) * | 2012-09-03 | 2012-11-28 | 中国科学院微电子研究所 | Sigma-Delta modulator and analog-digital converter |
| CN104052487A (en) * | 2013-03-13 | 2014-09-17 | 英飞凌科技奥地利有限公司 | System and Method for an Oversampled Data Converter |
| CN104732842A (en) * | 2013-12-20 | 2015-06-24 | 重庆煌能科技有限公司 | Electronic technique theory and practice integration teaching system |
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
| CN204857008U (en) * | 2014-12-31 | 2015-12-09 | 天津云控科技有限公司 | Multi -functional combined test case |
| CN204559408U (en) * | 2015-03-23 | 2015-08-12 | 广东美的制冷设备有限公司 | Intelligent power module |
| CN105302019A (en) * | 2015-10-13 | 2016-02-03 | 电子科技大学 | An electro-optic modulator bias operating point control device and method |
| CN205317849U (en) * | 2015-12-25 | 2016-06-15 | 国网新疆电力公司乌鲁木齐供电公司 | Commercial power electric power parameter detecting system |
| CN205406667U (en) * | 2016-02-29 | 2016-07-27 | 大唐恩智浦半导体有限公司 | Battery management system's battery correcting unit |
| CN106602881A (en) * | 2017-01-25 | 2017-04-26 | 杭州士兰微电子股份有限公司 | Synchronous rectification control circuit, power converter and control method thereof |
| CN107370375A (en) * | 2017-07-19 | 2017-11-21 | 深圳芯智汇科技有限公司 | DC DC translation circuits current sample, current-sharing control method and circuit |
| CN107633749A (en) * | 2017-09-27 | 2018-01-26 | 昆明理工大学 | A kind of waveform produces and translation circuit experimental provision and application method |
Non-Patent Citations (1)
| Title |
|---|
| 陈宁: "混合集成电路可测试性设计的研究", 《北方工业大学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111135478A (en) * | 2020-01-22 | 2020-05-12 | 哈尔滨理工大学 | A quasi-phase super-resolution circuit for respiratory motion signals on thoracic and abdominal surfaces |
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Application publication date: 20191022 |