CN110412363A - A kind of software polarity based on velocity close-loop control judges DC electric field measurement system - Google Patents
A kind of software polarity based on velocity close-loop control judges DC electric field measurement system Download PDFInfo
- Publication number
- CN110412363A CN110412363A CN201910644300.6A CN201910644300A CN110412363A CN 110412363 A CN110412363 A CN 110412363A CN 201910644300 A CN201910644300 A CN 201910644300A CN 110412363 A CN110412363 A CN 110412363A
- Authority
- CN
- China
- Prior art keywords
- signal
- electric field
- speed
- module
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005684 electric field Effects 0.000 title claims abstract description 152
- 238000005259 measurement Methods 0.000 title claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
- G01R29/14—Measuring field distribution
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
- H02P2205/07—Speed loop, i.e. comparison of the motor speed with a speed reference
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The present invention discloses a kind of software polarity based on velocity close-loop control and judges that DC electric field measurement system, system include signal processing module, signal biasing module, voltage comparison module, motor speed control module, speed measurement module, speed adjustment module, controller；Electric field signal processing module acquisition and reverse phase amplifies tested electric field signal, all the way through voltage relatively after output electric field square-wave signal to be input to the I/O mouth of controller, another way is input to the channel A/D of controller after signal biases；Motor speed control module exports grating signal and obtains speed signal through speed measurement module, pass to the external interrupt port of controller, controller is when speed signal causes external interrupt, it is consistent with preset value to control motor speed change by speed adjustment module output pwm signal, realize closed-loop control；Controller judges electric polarity by amplifier number within the period that grating signal causes external interrupt, according to the level state of electric field square-wave signal and electric field signal.
Description
Technical field
The present invention relates to technical field of electric field measurement more particularly to a kind of software polarity judgements based on velocity close-loop control
DC electric field measurement system.
Background technique
Currently, total electric field tester mostly uses pressure stabilizing opened loop control motor speed, hardware phase demodulation circuit to realize synthesis electricity
The processing mode of field signal.Motor speed determines the electric field signal of sensor output and the signal frequency of grating output, grating letter
Number identical with electric field signal frequency, according to electric polarity difference, the phase of the two signal is identical or opposite.Utilize this spy
Property, it can realize that electric field signal is handled, and obtains positive signal or minus polarity signal using hardware phase demodulation circuit.Minus polarity signal exists
Become positive signal by an inverting amplifier, so as to A/D processing.But hardware phase demodulation circuit need hardware component compared with
More, adjustment difficulty is big.
In addition, although voltage regulator circuit can be stablized in a big way exports some voltage value, due to motor performance
Difference can all influence motor speed when load changes (such as motor bite, bearing friction power increase), and motor speed becomes
Change will influence the variation of measuring signal frequency, and then influence the accuracy of result.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies, the present invention is mentioned thus
A kind of software polarity based on velocity close-loop control has been supplied to judge DC electric field measurement system.
Specific technical solution provided in an embodiment of the present invention is as follows:
It provides a kind of software polarity based on velocity close-loop control and judges DC electric field measurement system, the system comprises
Signal processing module, signal biasing module, voltage comparison module, motor speed control module, speed measurement module, speed are adjusted
Module, controller；
The signal processing module acquisition and reverse phase, which are amplified, is tested electric field signal, and the amplified electric field signal passes through all the way
The voltage comparison module exports electric field square-wave signal, and to be input to the I/O mouth of the controller, another way passes through the signal
The channel A/D of the controller is input to after biasing module processing；
The grating signal of the motor speed control module output handles to obtain speed signal through the speed measurement module,
And pass to the external interrupt port of the controller；
The controller calculates motor when the speed signal causes external interrupt, through the speed adjustment module
Pwm signal is consistent with preset value to control motor speed change；
The controller obtains the electric field square-wave signal within the period that the speed signal causes external interrupt
Level state, and inverting amplifier number is passed through according to the level state of the electric field square-wave signal and the electric field signal, sentence
Break the polarity of the electric field signal.
Further, the controller is specifically used for:
When the every n times of speed signal cause external interrupt, call PID interrupt routine in the speed adjustment module into
PID arithmetic of row calculates motor drive pulses duty ratio, and is exported according to the motor drive pulses duty ratio for driving
The pwm signal of dynamic motor is to the motor speed control module, and wherein N is positive integer.
Further, the external interrupt port of the controller is set as failing edge triggering mode.
Further, the control implement body is also used to:
It calls the PID interrupt routine in the speed adjustment module according to the preset control period, is driven according to the motor
The size of moving pulse duty ratio, within the time for being less than the motor drive pulses duty ratio, the pwm signal of output is height
Level, within the time for being greater than the motor drive pulses duty ratio, the pwm signal of output is low level.
Further, the controller passes through the speed adjustment module when the speed signal causes external interrupt
The pwm signal for calculating motor is consistent with preset value to control motor speed change, realizes motor speed closed-loop control, and guarantee electricity
Machine speed adjusts error and is no more than 0.5%.
Further, the voltage comparison module includes Zero-cross comparator circuit, and the electric field signal passes through the zero passage ratio
It is 0V compared with circuit formation low level, the electric field square-wave signal that high level is 5V.
Further, the signal biasing module is specifically used for:
The amplified electric field signal of the signal processing module is processed into positive bias electric field signal, and passes to the control
Device processed；
The control implement body is also used to:
A/D conversion is carried out according to the positive bias electric field signal, and the size of the electric field signal is calculated.
Further, the amplified electric field signal of the reverse phase is biased to 2.5V by the signal biasing module, obtains institute
State positive bias electric field signal.
Further, the control implement body is also used to:
Within the period that the speed signal causes external interrupt, the grating signal keeps low level state, calls
PID interrupt routine in the speed adjustment module reads the level state for receiving the electric field square-wave signal, and remembers respectively
Record high level and low level number；
If the high level number of record is greater than low level, the electric field square-wave signal of the period is recorded as
Otherwise the electric field square-wave signal of the period is recorded as low level state by high level state.
Further, the controller is also used to:
Low level state is kept in the speed signal and the electric field signal is by anti-in the signal processing module
When the number of phase amplifier is odd number, if the electric field square-wave signal is low level state, it is determined that the electric field signal is positive
Polarity, if the electric field square-wave signal is high level state, it is determined that the electric field signal is negative polarity；
Low level state is kept in the speed signal and the electric field signal is by anti-in the signal processing module
When the number of phase amplifier is even number, if the electric field square-wave signal is low level state, it is determined that the electric field signal is negative
Polarity, if the electric field square-wave signal is high level state, it is determined that the electric field signal is positive polarity.
The embodiment of the present invention provides a kind of software polarity based on velocity close-loop control and judges DC electric field measurement system, leads to
The measurement using grating realization to synthesis field tester motor speed is crossed, and by controller by calling in speed adjustment module
PID interrupt routine carries out PID arithmetic, obtains the pwm signal for driving motor, realizes and controls the real-time closed-loop of motor speed
It adjusts, allows motor stable operation under different load conditions, it is ensured that the stabilization of the tested electric field signal of sensor output,
Motor speed change bring measurement error is avoided on source；Also, utilize the speed signal handled grating signal
As the external interrupt signal for leaning on controller, according to the pass between electric field signal output level status and inverting amplifier series
System, to judge the polarity of electric field signal, realizes the accurate measurement of total electric field.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 shows the software polarity provided in an embodiment of the present invention based on velocity close-loop control and judges DC electric field measurement
The block diagram of system；
Fig. 2 shows PID interrupt routine flow diagrams provided in an embodiment of the present invention；
Fig. 3 shows the schematic diagram of Zero-cross comparator circuit provided in an embodiment of the present invention；
Fig. 4 shows the schematic diagram of voltage offset electric circuit provided in an embodiment of the present invention；
Fig. 5 shows polarity provided in an embodiment of the present invention and judges flow diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Fig. 1 shows the software polarity provided in an embodiment of the present invention based on velocity close-loop control and judges DC electric field measurement
The block diagram of system, as shown in Figure 1, the system includes that signal processing module 10, controller 20, voltage comparison module 30, signal are inclined
Module 40, motor speed control module 50, speed measurement module 60, speed adjustment module 70 are set, signal processing module 10 is distinguished
Be connected with voltage comparison module 30, signal biasing module 40, motor speed control module 50 respectively with speed measurement module 60,
Speed adjustment module 70 is connected, and voltage comparison module 30, signal biasing module 40, speed measurement module 60, speed adjust mould
Controller 20 is connected block 70 respectively.
The acquisition of signal processing module 10 and reverse phase amplify tested electric field signal, and amplified electric field signal is all the way through voltage ratio
Electric field square-wave signal is exported compared with module 30, to be input to the I/O mouth of controller 20, another way is handled by signal biasing module 40
It is input to the channel A/D of controller 20 afterwards.
The grating signal that motor speed control module 50 exports handles through speed measurement module 60 and obtains speed signal, and passes
The external interrupt port of controller 20 is passed, the grating signal exported through speed measurement module 60 is as external interrupt signal.
Controller 20 calculates the pwm signal of motor by speed adjustment module 70 when speed signal causes external interrupt
It is consistent in preset value to control motor speed, wherein controller 20 can be by calling in the PID in speed adjustment module 70
Disconnected program carries out PID arithmetic, obtains the pwm signal for driving motor, consistent with preset value to control motor speed；
Controller 20 obtains the level state of electric field square-wave signal within the period that speed signal causes external interrupt,
And pass through the number of inverting amplifier according to the level state of electric field square-wave signal and electric field signal, judge the pole of electric field signal
Property.
Specifically, signal processing module 10 includes sensor and multistage inverting amplifier, and sensor acquires total electric field letter
Number, multistage inverting amplifier is used to carry out reverse phase amplification to collected electric field signal.The light of motor speed control module output
Gate signal is used as the measuring signal of the revolving speed of synthesis Field probe motor, the grating that motor speed control module 50 exports
Signal is input to speed measurement module 60, and the amplitude and phase for inputting grating signal by 60 pairs of speed measurement module are adjusted
It is whole, to obtain the speed signal output of required waveform.Controller 20 can use single-chip microcontroller, through speed measurement module to grating
The speed signal that signal processing obtains can be used as the external interrupt INT0 port that external interrupt signal is transmitted to single-chip microcontroller, in speed
During degree signal causes external interrupt, single-chip microcontroller calls the PID interrupt routine in speed adjustment module 70 to carry out PID fortune
It calculates, the pwm signal for driving motor is obtained, with closed-loop control motor speed change in preset threshold.Preferably, controller
20 when speed signal causes external interrupt, calculates the pwm signal of motor by speed adjustment module 70 to control motor speed
Change, realization motor speed closed-loop control consistent with preset value, and guarantee that rotational speed regulation error is no more than 0.5%, wherein PID
Parameter needed for closed loop operation is that the rotational model established by physical structures such as motor, blades is calculated.Due to synthesis
Field probe motor speed determines the signal frequency of the electric field signal that sensor exports and grating output, therefore by based on as conjunction
At the measuring signal of the revolving speed of Field probe motor grating signal and PID closed-loop control motor speed adjust error 0.5% with
It is interior, it can be ensured that the stabilization of tested electric field signal.
Since synthesis Field probe motor speed determines the signal frequency of tested electric field signal and grating output, grating signal and
Electric field signal frequency is identical, and according to electric polarity difference, the phase of the two signal is identical or opposite.Using this characteristic, make
With the software polarity determining program in controller 20 can realize electric field signal handle, judge electric field signal be positive signal also
It is minus polarity signal.
The amplified electric field signal that signal processing module 10 exports passes to available electricity after voltage comparison module 30
Field square-wave signal, the electric field square-wave signal are input to the I/O mouth of controller 20, and controller 20 can read electric field at any time
Square-wave signal determines that electric field square-wave signal is high level state or low level state.So controller 20 can be made in light
Gate signal caused in the period of external interrupt, passed through signal processing according to the level state of electric field square-wave signal and electric field signal
The number of inverting amplifier in module judges that electric field signal is positive signal or minus polarity signal.
Further, controller 20 is specifically used for:
When the every n times of speed signal cause external interrupt, the PID interrupt routine in speed adjustment module 70 is called to carry out primary
PID arithmetic calculates motor drive pulses duty ratio, and according to the output of motor drive pulses duty ratio for driving motor
Pwm signal is to motor speed control module 50, and wherein N is positive integer.
Fig. 2 shows PID interrupt routine flow diagrams provided in an embodiment of the present invention to pass through motor referring to shown in Fig. 4
Rate control module acquires motor speed, obtains grating signal, and speed is exported after speed measurement module handles the grating signal
Signal is spent, passes to the external interrupt port of controller, controller passes through PID control when speed signal causes external interrupt
Device judges that speed adjusts whether error meets the requirements, to regulate and control motor speed, if satisfied, then exporting the pwm signal of control motor
Otherwise the step of acquiring by motor speed control module to motor speed is back to motor speed control module.
The controller calculates motor when the speed signal causes external interrupt, through the speed adjustment module
Pwm signal is to control motor speed change and preset value
Preferably, N=6, when speed signal is as external interrupt signal 6 external interrupts of every generation, PID interrupt routine into
PID arithmetic of row calculates motor drive pulses duty ratio, and is exported according to motor drive pulses duty ratio for driving electricity
The pwm signal of machine is to motor speed control module, to realize that closed-loop control motor speed change is no more than 0.5%.Wherein, speed
The working method that timing is 1ms, PID interrupt routine output pwm signal to motor speed control module can be set in adjustment module.
Further, the external interrupt port of controller 20 is set as failing edge triggering mode.When input external interrupt end
Mouthful speed signal current potential from high to low when generate interruption, that is to say, that a failing edge generates primary interrupt.
Further, controller 20 is specifically also used to:
Call the PID interrupt routine in speed adjustment module 70 according to the preset control period, according to motor drive pulses
The size of duty ratio, within the time for being less than motor drive pulses duty ratio, the pwm signal of output is high level, is being greater than electricity
In the time of machine driving pulse duty ratio, the pwm signal of output is low level.Preferably, every 100ms is as a control week
Phase.
Further, voltage comparison module 30 includes Zero-cross comparator circuit, and electric field signal is formed by Zero-cross comparator circuit
The electric field square-wave signal that low level is 0V, high level is 5V.
As shown in figure 3, Fig. 3 shows the schematic diagram of Zero-cross comparator circuit provided in an embodiment of the present invention, the Zero-cross comparator
For circuit using IC LMV33 as voltage comparator, the input terminal input of voltage comparator is put by signal processing module 10
Electric field signal after big, is compared the electric field signal with voltage reference signal V=0V by voltage comparator, can export
The electric field square-wave signal that low level is 0V, high level is 5V.
Further, signal biasing module 40, at the amplified electric field signal for exporting signal processing module 10
Positive bias electric field signal is managed into, and passes to controller 20；Controller 20 is also used to carry out A/D according to positive bias electric field signal
Conversion, and the size of electric field signal is calculated.
Further, the amplified electric field signal of reverse phase is biased to 2.5V by signal biasing module 40, obtains positive bias electricity
Field signal.The positive bias electric field signal that biasing circuit generates is exported to the channel A/D of controller 20, so that controller 20 carries out A/
D sampling processing, and handle and calibrate by software and obtain the size of electric field.
As shown in figure 4, Fig. 4 shows the schematic diagram of voltage offset electric circuit provided in an embodiment of the present invention, the voltage bias
Circuit carries out voltage bias processing to electric field signal using IC LF353 and is biased to 2.5V, obtains positive bias electric field signal, manages defeated
Enter bandwidth operational amplifiers, be double operational, feature is that high input impedance, low noise, bandwidth and output conversion rate are high.
Further, controller 20 is specifically also used to:
Within the period that speed signal causes external interrupt, speed signal keeps low level state, and speed is called to adjust
PID interrupt routine in module 70 reads the level state for receiving electric field square-wave signal, and records high level and low electricity respectively
Flat number；If the high level number of record is greater than low level, the electric field square-wave signal of period is recorded as high level
Otherwise the electric field square-wave signal of period is recorded as low level state by state.
Specifically, controller 20 calls the shape of I/O mouthfuls of PID interrupt routine Read Controller in speed adjustment module 70
State determines that the level state of electric field square-wave signal is high level or low level, and records high level and low level respectively
Number, the electric field square-wave signal of the period is recorded as high level state H2 if high level number is greater than low level, it is on the contrary then
The electric field square-wave signal of the period is recorded as low level state.
Further, controller 20 is specifically also used to:
Low level state is kept in speed signal and electric field signal is by the inverting amplifier in signal processing module 10
When number is odd number, if electric field square-wave signal is low level state, it is determined that electric field signal is positive polarity, if electric field square-wave signal
For high level state, it is determined that electric field signal is negative polarity；
Low level state is kept in speed signal and electric field signal is by the inverting amplifier in signal processing module 10
When number is even number, if electric field square-wave signal is low level state, it is determined that electric field signal is negative polarity, if electric field square-wave signal
For high level state, it is determined that electric field signal is positive polarity.
Specifically, software polarity determining program is equipped in controller 20, which can be realized electric field signal
Processing, judge electric field signal obtain positive signal or or minus polarity signal using software polarity judgment module.
Fig. 5 shows polarity provided in an embodiment of the present invention and judges flow diagram, referring to Figure 5, electric field signal and
Speed signal is input to polarity determining program, is carried out judging electric polarity according to polarity determining program, wherein polarity judges journey
Sequence can specifically judge that table judges the polarity of electric field signal according to electric field signal polarity as shown in the table, in which: L1 indicates speed
Degree signal is maintained at low level state, and L2 indicates that electric field square-wave signal low level state, H2 indicate electric field square-wave signal high level
State:
In conclusion in the embodiment of the present invention, synthesis Field probe motor speed determine sensor output electric field signal and
The frequency signal of grating output, grating signal is identical with electric field signal frequency, according to electric polarity difference, the phase of the two signal
It is identical or opposite.In terms of motor speed control, the speed signal that grating signal is handled is made through speed measurement module
For external interrupt signal, single-chip microcontroller external interrupt INT0 is intervened, every 6 interrupt routines carry out a PID arithmetic, calculate motor
The pwm signal of driving pulse duty ratio ZKB, PID interrupt routine output motor driving, parameter required for PID closed loop operation are logical
The rotational model for crossing the foundation of the physical structures such as motor, blade is calculated, and the calculating of motor speed is carried out by PID closed loop operation
With control so that motor speed control within 0.5%.Measurement and PID closed loop from there through grating signal to motor speed
Control, which is realized, adjusts control to the real-time closed-loop of motor speed, so that motor stable operation under different load conditions, it is ensured that pass
The stabilization of the tested electric field signal of sensor output, avoids motor speed change bring measurement error on source.Sentence in polarity
Disconnected aspect obtains electric field square-wave signal by voltage comparator after the electric field signal amplification of sensor output, and is connected to monolithic
I/O mouthfuls of machine, single-chip microcontroller reads the signal at any time, obtains high level or low level, utilizes level state and amplifier stage
Relationship between number, to judge the polarity of electric field signal.In terms of electric field measurement, the total electric field signal of sensor output passes through
It is biased to 2.5V after amplification, obtains positive bias electric field signal for Chip Microcomputer A/D sampling processing, is handled by software and calibration is
The size that electric field can be obtained realizes the accurate measurement of electric field signal.
To sum up, the embodiment of the present invention realizes measurement, polarity judgement to electric field level, completes the measurement to total electric field；
And it realizes and the accuracy of measuring instrument revolving speed is controlled, and control precision within 0.5%.
Although the preferred embodiment in the embodiment of the present invention has been described, once a person skilled in the art knows
Basic creative concept, then additional changes and modifications may be made to these embodiments.So appended claims are intended to explain
Being includes preferred embodiment and all change and modification for falling into range in the embodiment of the present invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of software polarity based on velocity close-loop control judges DC electric field measurement system, which is characterized in that the system
Including signal processing module, signal biasing module, voltage comparison module, motor speed control module, speed measurement module, speed
Adjustment module, controller；
The signal processing module acquisition and reverse phase, which are amplified, is tested electric field signal, and the amplified electric field signal passes through described all the way
Voltage comparison module exports electric field square-wave signal, and to be input to the I/O mouth of the controller, another way is biased by the signal
The channel A/D of the controller is input to after resume module；
The grating signal of the motor speed control module output handles to obtain speed signal through the speed measurement module, and passes
Pass the external interrupt port of the controller；
The controller calculates the PWM of motor by the speed adjustment module when the speed signal causes external interrupt
Signal is consistent with preset value to control motor speed change；
The controller obtains the level of the electric field square-wave signal within the period that the speed signal causes external interrupt
State, and inverting amplifier number is passed through according to the level state of the electric field square-wave signal and the electric field signal, judge institute
State the polarity of electric field signal.
2. system according to claim 1, which is characterized in that the controller is specifically used for:
When the every n times of grating signal cause external interrupt, the PID interrupt routine in the speed adjustment module is called to carry out one
Secondary PID arithmetic calculates motor drive pulses duty ratio, and is exported according to the motor drive pulses duty ratio for driving electricity
The pwm signal of machine is to the motor speed control module, and wherein N is positive integer.
3. system according to claim 2, which is characterized in that the external interrupt port of the controller is set as failing edge
Triggering mode.
4. system according to claim 2, which is characterized in that the control implement body is also used to:
Call the PID interrupt routine in the speed adjustment module according to the preset control period, according to the motor driven arteries and veins
The size for rushing duty ratio, within the time for being less than the motor drive pulses duty ratio, the pwm signal of output is high electricity
Flat, within the time for being greater than the motor drive pulses duty ratio, the pwm signal of output is low level.
5. system according to claim 1, which is characterized in that the controller causes external interrupt in the speed signal
When, the pwm signal for calculating motor by the speed adjustment module is consistent with preset value to control motor speed change, realizes electricity
Machine velocity close-loop control, and guarantee that rotational speed regulation error is no more than 0.5%.
6. system according to claim 1, which is characterized in that the voltage comparison module includes Zero-cross comparator circuit, institute
State electric field signal by the Zero-cross comparator circuit formed low level be 0V, the electric field square-wave signal that high level is 5V.
7. system according to claim 1, which is characterized in that the signal biasing module is specifically used for:
The amplified electric field signal of the signal processing module is processed into positive bias electric field signal, and passes to the control
Device；
The control implement body is also used to:
A/D conversion is carried out according to the positive bias electric field signal, and the size of the electric field signal is calculated.
8. system according to claim 7, which is characterized in that the signal biasing module puts the signal processing module
Electric field signal after big is biased to 2.5V, obtains the positive bias electric field signal.
9. system according to any one of claims 1 to 8, which is characterized in that the control implement body is also used to:
Within the period that the speed signal causes external interrupt, the speed signal keeps low level state, described in calling
PID interrupt routine in speed adjustment module reads the level state for receiving the electric field square-wave signal, and record is high respectively
Level and low level number；
If the high level number of record is greater than low level, the electric field square-wave signal of the period is recorded as high electricity
Otherwise the electric field square-wave signal of the period is recorded as low level state by level state.
10. system according to claim 9, which is characterized in that the control implement body is also used to:
It is put in the reverse phase that the speed signal keeps low level state and the electric field signal to pass through in the signal processing module
When the number of big device is odd number, if the electric field square-wave signal is low level state, it is determined that the electric field signal is positive polarity,
If the electric field square-wave signal is high level state, it is determined that the electric field signal is negative polarity；
It is put in the reverse phase that the speed signal keeps low level state and the electric field signal to pass through in the signal processing module
When the number of big device is even number, if the electric field square-wave signal is low level state, it is determined that the electric field signal is negative polarity,
If the electric field square-wave signal is high level state, it is determined that the electric field signal is positive polarity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910644300.6A CN110412363B (en) | 2019-07-17 | 2019-07-17 | Software polarity judgment direct current electric field measurement system based on speed closed-loop control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910644300.6A CN110412363B (en) | 2019-07-17 | 2019-07-17 | Software polarity judgment direct current electric field measurement system based on speed closed-loop control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110412363A true CN110412363A (en) | 2019-11-05 |
| CN110412363B CN110412363B (en) | 2021-07-20 |
Family
ID=68361755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910644300.6A Active CN110412363B (en) | 2019-07-17 | 2019-07-17 | Software polarity judgment direct current electric field measurement system based on speed closed-loop control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110412363B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117165A (en) * | 1990-06-29 | 1992-05-26 | Seagate Technology, Inc. | Closed-loop control of a brushless DC motor from standstill to medium speed |
| CN1820346A (en) * | 2003-05-09 | 2006-08-16 | 株式会社荏原制作所 | Testing apparatus using charged particles and device manufacturing method using the testing apparatus |
| CN101419257A (en) * | 2008-10-10 | 2009-04-29 | 清华大学 | Ground electric field measurement system for AC/DC parallel powerline and measurement method thereof |
| US20100198462A1 (en) * | 2009-01-30 | 2010-08-05 | Jtekt Corporation | Electric motor controller and electric motor controller for vehicle steering apparatus |
| CN103400483A (en) * | 2013-06-28 | 2013-11-20 | 国家电网公司 | Data acquisition system for measurement of direct-current electric field |
| CN103675482A (en) * | 2013-11-14 | 2014-03-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Complex electrical field measuring system |
| CN103825518A (en) * | 2014-03-05 | 2014-05-28 | 华侨大学 | System and method for phase sequence detection and rotor initial location positioning of three-phase permanent-magnet synchronous motor |
| CN104181402A (en) * | 2014-08-18 | 2014-12-03 | 国家电网公司 | Direct-current electric field detecting device used under condition of hybrid electric field |
| US20170133955A9 (en) * | 2008-01-22 | 2017-05-11 | Accio Energy, Inc. | Electro-hydrodynamic system |
| CN106817062A (en) * | 2017-04-13 | 2017-06-09 | 杨子佳 | Speedless sensor motor driven systems |
| CN106817056A (en) * | 2017-04-13 | 2017-06-09 | 王志阳 | Motor driven systems based on harmonic wave observer |
| CN206258522U (en) * | 2016-11-18 | 2017-06-16 | 国网甘肃省电力公司电力科学研究院 | A kind of 12 fan blade type alternating current-direct current complex electrical field detectors |
| US20180167011A1 (en) * | 2016-12-09 | 2018-06-14 | Allegro Microsystems, Llc | Methods and apparatus for motor startup with sinusoidal phase current |
-
2019
- 2019-07-17 CN CN201910644300.6A patent/CN110412363B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117165A (en) * | 1990-06-29 | 1992-05-26 | Seagate Technology, Inc. | Closed-loop control of a brushless DC motor from standstill to medium speed |
| CN1820346A (en) * | 2003-05-09 | 2006-08-16 | 株式会社荏原制作所 | Testing apparatus using charged particles and device manufacturing method using the testing apparatus |
| US20170133955A9 (en) * | 2008-01-22 | 2017-05-11 | Accio Energy, Inc. | Electro-hydrodynamic system |
| CN101419257A (en) * | 2008-10-10 | 2009-04-29 | 清华大学 | Ground electric field measurement system for AC/DC parallel powerline and measurement method thereof |
| US20100198462A1 (en) * | 2009-01-30 | 2010-08-05 | Jtekt Corporation | Electric motor controller and electric motor controller for vehicle steering apparatus |
| CN103400483A (en) * | 2013-06-28 | 2013-11-20 | 国家电网公司 | Data acquisition system for measurement of direct-current electric field |
| CN103675482A (en) * | 2013-11-14 | 2014-03-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Complex electrical field measuring system |
| CN103825518A (en) * | 2014-03-05 | 2014-05-28 | 华侨大学 | System and method for phase sequence detection and rotor initial location positioning of three-phase permanent-magnet synchronous motor |
| CN104181402A (en) * | 2014-08-18 | 2014-12-03 | 国家电网公司 | Direct-current electric field detecting device used under condition of hybrid electric field |
| CN206258522U (en) * | 2016-11-18 | 2017-06-16 | 国网甘肃省电力公司电力科学研究院 | A kind of 12 fan blade type alternating current-direct current complex electrical field detectors |
| US20180167011A1 (en) * | 2016-12-09 | 2018-06-14 | Allegro Microsystems, Llc | Methods and apparatus for motor startup with sinusoidal phase current |
| CN106817062A (en) * | 2017-04-13 | 2017-06-09 | 杨子佳 | Speedless sensor motor driven systems |
| CN106817056A (en) * | 2017-04-13 | 2017-06-09 | 王志阳 | Motor driven systems based on harmonic wave observer |
Non-Patent Citations (5)
| Title |
|---|
| KEE SCHOLTEN: ""A review of implantable biosensors for closed-loop glucose control and other drug delivery applications "", 《INTERNATIONAL JOURNAL OF PHARMACEUTICS》 * |
| YONGJIE LUO: ""A distributed control method for power module voltage balancing of modular multilevel converters"", 《2016 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION》 * |
| 吕应明: ""直流输电线路下地面合成电场的无线同步测量系统研究"", 《电网技术》 * |
| 张广洲: ""输变电工程工频电场实时智能监测系统设计"", 《水电能源科学》 * |
| 杨健: ""基于旋转高频电压注入的永磁同步电机转子初始位置辨识方法"", 《电工技术学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110412363B (en) | 2021-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205123639U (en) | Micro direct current motor intelligence speed regulator | |
| CN108249238A (en) | A kind of elevator is without detent torque compensation method, the apparatus and system of weighing | |
| CN110412363A (en) | A kind of software polarity based on velocity close-loop control judges DC electric field measurement system | |
| CN104460409B (en) | A kind of laser self-mixing interference system adjusted with feedback light Self-adaptive strength | |
| CN102520630B (en) | Automatic power and amplitude modulation factor control circuit and power adjustment method | |
| US20140265969A1 (en) | Detection of Back EMF in Two Terminal Actuator | |
| CN108155839A (en) | The measuring method of the dedicated AC permanent magnet synchronous motor back EMF coefficient of elevator and elevator operation and maintenance method | |
| CN102389593B (en) | Differential flow signal processing device and method | |
| JPH0128963B2 (en) | ||
| CN210898992U (en) | Intelligent speed regulation control system of motor | |
| US4151743A (en) | Densitometer drive | |
| CN118275029B (en) | Pressure transmitter signal processing circuit | |
| CN219980676U (en) | Intelligent rotating speed controller | |
| RU2006903C1 (en) | Temperature regulator | |
| JPS6220690A (en) | Method and device for controlling pump flow rate to constant | |
| JPS61226573A (en) | Water level controller | |
| SU1742730A1 (en) | Device for rotational speed measurement | |
| CN117970515A (en) | Inertial gravity sensor based on double-current drive and servo control circuit thereof | |
| CN106292819A (en) | A kind of constant current mode resistance dependent sensor signal conditioning circuit | |
| SU316171A1 (en) | METHOD OF REGULATING THE EXCITATION OF SYNCHRONOUS GENERATORS | |
| KR20020014398A (en) | Pulse frequency measuring device using closed loop system | |
| JPS62210515A (en) | Digital servo system controller | |
| SU782112A1 (en) | Rotational speed regulator for dc micromotor | |
| CN108168501A (en) | A kind of roughmeter measuring speed auto-correction method and roughmeter | |
| SU1591060A1 (en) | Method of determining error of mismatch signal shaper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |