CN110176851A - A kind of electric power regulation device - Google Patents
A kind of electric power regulation device Download PDFInfo
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- CN110176851A CN110176851A CN201910399572.4A CN201910399572A CN110176851A CN 110176851 A CN110176851 A CN 110176851A CN 201910399572 A CN201910399572 A CN 201910399572A CN 110176851 A CN110176851 A CN 110176851A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
Abstract
The invention discloses a kind of electric power regulation devices, including power signal Acquisition Circuit, split circuit, circuit is calibrated in frequency-selecting, frequency modulation rectification circuit and voltage conversion circuit, the power signal Acquisition Circuit acquires the power signal of electromechanical equipment power supply with the power harvester J1 of model AD8318, the split circuit uses variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5 forms the two paths of signals that signal is divided into the different width with frequency by split circuit, the signal of single-frequency is filtered out with resistance R5- resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit all the way, two road frequency modulation rectification circuits are with triode Q1 and capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation, last voltage conversion circuit uses transport and placing device AR5 and variable resistance R16 , capacitor C14 composition voltage conversion circuit current signal is converted into voltage signal after export, according to the power signal of the power of electromechanical equipment power supply itself automatically adjust electromechanical equipment power supply power compensation signal size.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of electric power regulation device.
Background technique
At present, equipment is usually people's material goods such as required mechanical, device and facility in production and life
General name, electromechanical equipment be then apply mechanical, electronic technology equipment, and usually said mechanical equipment be electromechanical equipment most
Important component part, the power supply of electromechanical equipment is that urban network electricity pressure is powered, after electromechanical equipment internal voltage converter transformation
For electromechanical equipment power supply, since low pressure electromechanical equipment runing time is too long, the frictional dissipation being easy between fever and equipment can increase
Voltage output power loss after adding low pressure electromechanical equipment internal voltage converter transformation that is to say and cause electromechanical equipment power supply electricity
The situation of the underpower in source, it is prolonged to run, it is easy to electric arc occur, cause fire, cause the loss for being difficult to estimate.
So the present invention provides the new scheme of one kind to solve the problems, such as this.
Summary of the invention
For above situation, for the defect for overcoming the prior art, purpose of the present invention is to provide a kind of electric power tune
Control device, have be skillfully constructed, the characteristic of human oriented design, can power real-time monitoring to electromechanical equipment power supply, together
When power signal is calibrated automatically, be converted to the thermal compensation signal of electromechanical equipment power supply power.
Its technical solution solved is a kind of electric power regulation device, including power signal Acquisition Circuit, separation electricity
Road, frequency-selecting calibration circuit, frequency modulation rectification circuit and voltage conversion circuit, the power signal Acquisition Circuit use model
The power signal of the power harvester J1 acquisition electromechanical equipment power supply of AD8318, with inductance L1 and capacitor C2, capacitor C3
The filtering of π type filter circuit is formed, the split circuit uses variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5 group
Signal is divided into the two paths of signals of the different width with frequency at split circuit, is adjusted all the way through frequency-selecting calibration circuit, with resistance R5- electricity
Resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit filters out the signal of single-frequency, while using diode D5- diode D8
With transport and placing device AR1 composition compound circuit to signal limiter-amplification-amplitude limiting processing, two road frequency modulation rectification circuits use triode Q1
With capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation, and use variable resistance RW3 and diode D2, diode D3
Rectification circuit is formed to signal rectification, last voltage conversion circuit does addition process to two paths of signals with transport and placing device AR2, and
After current signal is converted to voltage signal with transport and placing device AR5 and variable resistance R16, capacitor C14 composition voltage conversion circuit
Output, that is to say as the thermal compensation signal of electromechanical equipment power supply power；
The split circuit includes variable resistance RW 1, and one end of the 2 connecting resistance R2 of contact of variable resistance RW1, capacitor C4 can be changed
The contact 1 of resistance RW1 connects the other end of capacitor C4 and one end of resistance R4, capacitor C5, and the contact 3 of variable resistance RW1 connects capacitor
One end of C5, one end of another terminating resistor R3 of resistance R2, the contact 2 of another termination variable resistance RW2 of resistance R3 can be changed
The other end of the 1 connecting resistance R4 of contact of resistance RW2；
The frequency-selecting calibration circuit includes capacitor C8, one end of a terminating resistor R5 of capacitor C8 and the contact of variable resistance RW1
One end of another termination capacitor C7 of 3, capacitor C8 and one end of resistance R6, another terminating resistor R7 of resistance R5, capacitor C6
One end, another termination the of resistance R6, capacitor C6, the other end of another termination capacitor C7 of resistance R7 and diode D5's is negative
Pole, diode D6 anode, one end of positive connecting resistance R11 of diode D5 and the cathode of diode D6 and transport and placing device AR1
Non-inverting input terminal, one end of the anti-phase input terminating resistor R12 of transport and placing device AR1, resistance R12 the other end ground connection, transport and placing device
The other end of the output terminating resistor R11 of AR1 and the anode of the cathode of diode D7, diode D8；
The frequency modulation rectification circuit includes triode Q1, and the base stage of triode Q1 meets contact 3 and the capacitor C9 of variable resistance RW2
One end, one end of the emitter connecting resistance R9 of triode Q1, resistance R10, the other end of another termination capacitor C9 of resistance R9 and
One end of capacitor C10, resistance R10, capacitor C10 the other end ground connection, the other end of the collector connecting resistance R8 of triode Q1 and
One end of capacitor C11, anode, the diode of another terminating diode D2 of another termination power+5V of resistance R8, capacitor C11
The cathode of D3 and one end of capacitor C12, capacitor C13, the cathode of diode D2 meet one end and the variable resistance RW3 of capacitor C12
Contact 2, the contact 1 of variable resistance RW3 connect the anode of diode D3 and the other end of capacitor C13, the contact 3 of variable resistance RW3
Connect the anode of diode D7, the cathode of diode D8.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art；
1, signal is divided into frequency not with variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5 composition split circuit
With the two paths of signals of width, the amplitude ratio to two paths of signals output is played using the resistance value ratio of variable resistance RW1, variable resistance RW2,
The signal of single-frequency, the letter of single-frequency are filtered out with resistance R5- resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit
Number guarantee signal frequency stabilization, while with diode D5- diode D8 and transport and placing device AR1 composition compound circuit to signal limit
Width-amplification-amplitude limiting processing is symmetrical limiting, can increase clipping depth, guarantee that signal has enough bandwidth；
2. capacitor C9, capacitor C10 are bypass with triode Q1 and capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation
Capacitor filters out high-frequency signal noise, and capacitor C11 is decoupling capacitor, filters out low frequency signal noise, realizes the work to signal frequency modulation
With triode Q1 is amplifying triode, and forms rectification circuit pair with variable resistance RW3 and diode D2, diode D3
Signal rectification is further ensured that the stabilization of signal code, using aforesaid way, ensure that the stabilization of thermal compensation signal, realizes pair
The automatic calibration of signal turns current signal with transport and placing device AR5 and variable resistance R16, capacitor C14 composition voltage conversion circuit
It is exported after being changed to voltage signal, that is to say as the thermal compensation signal of electromechanical equipment power supply power, can be supplied according to electromechanical equipment
The power compensation signal size of the power signal automatic adjustment electromechanical equipment power supply of the power of power supply itself.
Detailed description of the invention
Fig. 1 is a kind of module map of electric power regulation device of the present invention.
Fig. 2 is a kind of schematic diagram of electric power regulation device of the present invention.
Fig. 3 is a kind of electric power regulation device feedback compensation circuit schematic diagram of the present invention.
Specific embodiment
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to figures 1 through attached drawing 3
To in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following embodiment is with specification
Attached drawing is reference.
Embodiment one, a kind of electric power regulation device, including power signal Acquisition Circuit, split circuit, frequency-selecting calibration
Circuit, frequency modulation rectification circuit and voltage conversion circuit, which is characterized in that the power signal Acquisition Circuit uses model
The power signal of the power harvester J1 acquisition electromechanical equipment power supply of AD8318, with inductance L1 and capacitor C2, capacitor C3
The filtering of π type filter circuit is formed, the split circuit uses variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5 group
Signal is divided into the two paths of signals of the different width with frequency at split circuit, is adjusted all the way through frequency-selecting calibration circuit, with resistance R5- electricity
Resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit filters out the signal of single-frequency, while using diode D5- diode D8
With transport and placing device AR1 composition compound circuit to signal limiter-amplification-amplitude limiting processing, two road frequency modulation rectification circuits use triode Q1
With capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation, and use variable resistance RW3 and diode D2, diode D3
Rectification circuit is formed to signal rectification, last voltage conversion circuit does addition process to two paths of signals with transport and placing device AR2, and
After current signal is converted to voltage signal with transport and placing device AR5 and variable resistance R16, capacitor C14 composition voltage conversion circuit
Output, that is to say as the thermal compensation signal of electromechanical equipment power supply power；
The split circuit forms split circuit for signal with variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5
It is divided into the two paths of signals of the different width with frequency, is played using the resistance value ratio of variable resistance RW1, variable resistance RW2 defeated to two paths of signals
Amplitude ratio out, wherein capacitor C4, capacitor C5 are shunt capacitance, filter out high-frequency signal noise, calibrate circuit tune through frequency-selecting all the way
Section filters out the signal of single-frequency, single-frequency with resistance R5- resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit
Signal guarantee signal frequency stabilization, while with diode D5- diode D8 and transport and placing device AR1 composition compound circuit to letter
Number clipping-amplification-amplitude limiting processing is symmetrical limiting, can increase clipping depth, guarantee that signal has enough bandwidth, two road tune
With triode Q1 and capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation, capacitor C9, capacitor C10 are frequency rectification circuit
Shunt capacitance filters out high-frequency signal noise, and capacitor C11 is decoupling capacitor, filters out low frequency signal noise, realizes to signal frequency modulation
Effect, triode Q1 are amplifying triode, and form rectification circuit with variable resistance RW3 and diode D2, diode D3
To signal rectification, it is further ensured that the stabilization of signal code, using aforesaid way, ensure that the stabilization of thermal compensation signal, realize
Automatic calibration to signal；
Particular circuit configurations are as follows: one end of the 2 connecting resistance R2 of contact of variable resistance RW1, capacitor C4, the touching of variable resistance RW1
Point 1 connects the other end of capacitor C4 and one end of resistance R4, capacitor C5, and the contact 3 of variable resistance RW1 connects one end of capacitor C5, electricity
Hinder one end of another terminating resistor R3 of R2, the contact 2 of another termination variable resistance RW2 of resistance R3, the touching of variable resistance RW2
The other end of 1 connecting resistance R4 of point；One end of a terminating resistor R5 of capacitor C8 and the contact 3 of variable resistance RW1, capacitor C8's is another
One end of one termination capacitor C7 and one end of resistance R6, one end of another terminating resistor R7 of resistance R5, capacitor C6, resistance R6,
The cathode of another termination of capacitor C6, the other end of another termination capacitor C7 of resistance R7 and diode D5, diode D6
Anode, one end of positive connecting resistance R11 of diode D5 and the non-inverting input terminal of the cathode of diode D6 and transport and placing device AR1,
One end of the anti-phase input terminating resistor R12 of transport and placing device AR1, the other end ground connection of resistance R12, the output termination of transport and placing device AR1
The anode of the cathode of the other end of resistance R11 and diode D7, diode D8；The base stage of triode Q1 connects variable resistance RW2's
One end of contact 3 and capacitor C9, one end of the emitter connecting resistance R9 of triode Q1, resistance R10, another termination electricity of resistance R9
Hold the other end of C9 and one end of capacitor C10, the other end ground connection of resistance R10, capacitor C10, the collector of triode Q1 connects electricity
Hinder the other end of R8 and one end of capacitor C11, another terminating diode D2 of another termination power+5V of resistance R8, capacitor C11
Anode, the cathode of diode D3 and one end of capacitor C12, capacitor C13, the cathode of diode D2 connect capacitor C12 one end and
The contact 2 of variable resistance RW3, the contact 1 of variable resistance RW3 connect the anode of diode D3 and the other end of capacitor C13, can power transformation
The contact 3 of resistance RW3 connects the cathode of the anode of diode D7, diode D8.
Embodiment two, on the basis of example 1, the voltage conversion circuit do two paths of signals with transport and placing device AR2
It is consistent with former power signal current potential to guarantee thermal compensation signal, and uses transport and placing device AR5 and variable resistance R16, capacitor for addition process
C14 composition voltage conversion circuit exports after current signal is converted to voltage signal, that is to say as electromechanical equipment power supply function
The thermal compensation signal of rate overcomes the situation of the underpower of electromechanical equipment power supply, transport and placing device by the way of thermal compensation signal
The contact 3 of the homophase input termination variable resistance RW3 of AR2 and one end of resistance R13, the anti-phase input of transport and placing device AR2 terminate electricity
One end of R14 is hindered, the other end of resistance R14 is grounded, the other end and resistance R17 of the output terminating resistor R13 of transport and placing device AR2,
One end of resistance R20, resistance R15, one end of capacitor C14 and variable resistance R16, another termination of resistance R17, resistance R15
Ground, the other end ground connection of another termination power+5V of variable resistance R16, capacitor C14, the anti-phase input of transport and placing device AR5 terminate electricity
Hinder R20 the other end and resistance R18 one end, transport and placing device AR5 output terminating resistor R18 the other end and resistance R19 one
End, another termination signal output port of resistance R19.
Embodiment three, on the basis of example 1, the power signal Acquisition Circuit select model AD8318 power
Collector J1 acquires the power signal of electromechanical equipment power supply, forms π type filtered electrical with inductance L1 and capacitor C2, capacitor C3
Road filtering, one end of the power supply termination power+5V and capacitor C1 of power harvester J1, the ground terminal ground connection of power harvester J1,
The other end of the output termination capacitor C1 of power harvester J1 and the cathode of inductance L1, one end of capacitor C2 and voltage-stabiliser tube D1,
The plus earth of voltage-stabiliser tube D1, the other end ground connection of capacitor C2, one end of another terminating resistor R1 of inductance L1, capacitor C3, electricity
Hold the other end ground connection of C3, the other end of another terminating resistor R2 of resistance R1.
The present invention it is specifically used when, a kind of electric power regulation device, including power signal Acquisition Circuit, split circuit,
Circuit, frequency modulation rectification circuit and voltage conversion circuit are calibrated in frequency-selecting, and the power signal Acquisition Circuit uses model AD8318
Power harvester J1 acquisition electromechanical equipment power supply power signal, with inductance L1 and capacitor C2, capacitor C3 form π type
Filter circuit filtering, the split circuit is with variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5 composition separation electricity
Signal is divided into the two paths of signals of the different width with frequency by road, is played using the resistance value ratio of variable resistance RW1, variable resistance RW2 to two
The amplitude ratio of road signal output, wherein capacitor C4, capacitor C5 are shunt capacitance, high-frequency signal noise are filtered out, all the way through frequency-selecting school
Quasi- circuit is adjusted, and the signal of single-frequency is filtered out with resistance R5- resistance R7 and capacitor C6- capacitor C8 composition frequency selection circuit,
The signal of single-frequency guarantees the stabilization of signal frequency, while compound with diode D5- diode D8 and transport and placing device AR1 composition
Circuit is symmetrical limiting, can increase clipping depth, guarantee that signal has enough bands to signal limiter-amplification-amplitude limiting processing
Width, two road frequency modulation rectification circuits with triode Q1 and capacitor C9- capacitor C11 composition FM circuit to signal frequency modulation, capacitor C9,
Capacitor C10 is shunt capacitance, filters out high-frequency signal noise, and capacitor C11 is decoupling capacitor, filters out low frequency signal noise, realization pair
The effect of signal frequency modulation, triode Q1 is amplifying triode, and uses variable resistance RW3 and diode D2, diode D3 group
At rectification circuit to signal rectification, it is further ensured that the stabilization of signal code, using aforesaid way, ensure that the steady of thermal compensation signal
It is fixed, the automatic calibration to signal is realized, last voltage conversion circuit does addition process to two paths of signals with transport and placing device AR2,
And current signal is converted into voltage letter with transport and placing device AR5 and variable resistance R16, capacitor C14 composition voltage conversion circuit
It exports, is that is to say as the thermal compensation signal of electromechanical equipment power supply power after number.
The above is that further detailed description of the invention, and it cannot be said that the present invention in conjunction with specific embodiment
Specific implementation is limited only to this；Belonging to the present invention and for those skilled in the technology concerned, it is being based on skill of the present invention
Under the premise of art scheme thinking, it is made expansion and operating method, data replacement, should all fall in the scope of the present invention it
It is interior.
Claims (3)
1. a kind of electric power regulation device, including power signal Acquisition Circuit, split circuit, frequency-selecting calibration circuit, frequency modulation are whole
Current circuit and voltage conversion circuit, which is characterized in that the power signal Acquisition Circuit is adopted with the power of model AD8318
Storage J1 acquires the power signal of electromechanical equipment power supply, forms π type filter circuit with inductance L1 and capacitor C2, capacitor C3
Filtering, the split circuit form split circuit for signal with variable resistance RW1, variable resistance RW2 and capacitor C4, capacitor C5
It is divided into the two paths of signals of the different width with frequency, is adjusted all the way through frequency-selecting calibration circuit, with resistance R5- resistance R7 and capacitor C6- electricity
Hold C8 composition frequency selection circuit and filter out the signal of single-frequency, while being formed with diode D5- diode D8 and transport and placing device AR1
Compound circuit uses triode Q1 and capacitor C9- capacitor C11 to signal limiter-amplification-amplitude limiting processing, two road frequency modulation rectification circuits
FM circuit is formed to signal frequency modulation, and with variable resistance RW3 and diode D2, diode D3 composition rectification circuit to letter
Number rectification, last voltage conversion circuit do addition process to two paths of signals with transport and placing device AR2, and with transport and placing device AR5 with
Variable resistance R16, capacitor C14 composition voltage conversion circuit export after current signal is converted to voltage signal, that is to say as machine
The thermal compensation signal of electric equipment power supply power；
The split circuit includes variable resistance RW 1, and one end of the 2 connecting resistance R2 of contact of variable resistance RW1, capacitor C4 can be changed
The contact 1 of resistance RW1 connects the other end of capacitor C4 and one end of resistance R4, capacitor C5, and the contact 3 of variable resistance RW1 connects capacitor
One end of C5, one end of another terminating resistor R3 of resistance R2, the contact 2 of another termination variable resistance RW2 of resistance R3 can be changed
The other end of the 1 connecting resistance R4 of contact of resistance RW2；
The frequency-selecting calibration circuit includes capacitor C8, one end of a terminating resistor R5 of capacitor C8 and the contact of variable resistance RW1
One end of another termination capacitor C7 of 3, capacitor C8 and one end of resistance R6, another terminating resistor R7 of resistance R5, capacitor C6
One end, another termination the of resistance R6, capacitor C6, the other end of another termination capacitor C7 of resistance R7 and diode D5's is negative
Pole, diode D6 anode, one end of positive connecting resistance R11 of diode D5 and the cathode of diode D6 and transport and placing device AR1
Non-inverting input terminal, one end of the anti-phase input terminating resistor R12 of transport and placing device AR1, resistance R12 the other end ground connection, transport and placing device
The other end of the output terminating resistor R11 of AR1 and the anode of the cathode of diode D7, diode D8；
The frequency modulation rectification circuit includes triode Q1, and the base stage of triode Q1 meets contact 3 and the capacitor C9 of variable resistance RW2
One end, one end of the emitter connecting resistance R9 of triode Q1, resistance R10, the other end of another termination capacitor C9 of resistance R9 and
One end of capacitor C10, resistance R10, capacitor C10 the other end ground connection, the other end of the collector connecting resistance R8 of triode Q1 and
One end of capacitor C11, anode, the diode of another terminating diode D2 of another termination power+5V of resistance R8, capacitor C11
The cathode of D3 and one end of capacitor C12, capacitor C13, the cathode of diode D2 meet one end and the variable resistance RW3 of capacitor C12
Contact 2, the contact 1 of variable resistance RW3 connect the anode of diode D3 and the other end of capacitor C13, the contact 3 of variable resistance RW3
Connect the anode of diode D7, the cathode of diode D8.
2. a kind of electric power regulation device as described in claim 1, which is characterized in that the voltage conversion circuit includes amplifier
The contact 3 of the homophase input termination variable resistance RW3 of device AR2, transport and placing device AR2 and one end of resistance R13, transport and placing device AR2's is anti-
One end of terminating resistor R14 is mutually inputted, the other end ground connection of resistance R14, the output terminating resistor R13's of transport and placing device AR2 is another
The one end at end and resistance R17, resistance R20, resistance R15, one end of capacitor C14 and variable resistance R16, resistance R17, resistance
The other end of R15 is grounded, the other end ground connection of another termination power+5V of variable resistance R16, capacitor C14, transport and placing device AR5's
The other end of anti-phase input terminating resistor R20 and one end of resistance R18, the other end of the output terminating resistor R18 of transport and placing device AR5
With one end of resistance R19, another termination signal output port of resistance R19.
3. a kind of electric power regulation device as described in claim 1, which is characterized in that the power signal Acquisition Circuit includes
One end of the power supply termination power+5V and capacitor C1 of model AD8318 power harvester J1, power harvester J1, power collecting
The ground terminal of device J1 is grounded, the other end and inductance L1 of the output termination capacitor C1 of power harvester J1, capacitor C2 one end with
And the cathode of voltage-stabiliser tube D1, the plus earth of voltage-stabiliser tube D1, the other end ground connection of capacitor C2, another terminating resistor of inductance L1
One end of R1, capacitor C3, the other end ground connection of capacitor C3, the other end of another terminating resistor R2 of resistance R1.
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| CN201910399572.4A CN110176851A (en) | 2019-05-14 | 2019-05-14 | A kind of electric power regulation device |
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| CN201910399572.4A CN110176851A (en) | 2019-05-14 | 2019-05-14 | A kind of electric power regulation device |
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| CN110460796A (en) * | 2019-08-30 | 2019-11-15 | 郑州工程技术学院 | A kind of industrial equipment operation monitoring signal adjusting circuit |
| CN110686805A (en) * | 2019-10-17 | 2020-01-14 | 西安建筑科技大学 | Method and circuit for calibrating temperature signal of double reheat steam of thermal power plant |
| CN110887869A (en) * | 2019-11-29 | 2020-03-17 | 苏业梅 | KYN type high-voltage board dew point detection circuitry |
| CN110968012A (en) * | 2019-12-26 | 2020-04-07 | 郑州科技学院 | Electronic signal compensation device |
| CN110988579A (en) * | 2019-12-31 | 2020-04-10 | 国网河南省电力公司信息通信公司 | Power grid fault real-time monitoring system |
| CN111082789A (en) * | 2020-01-22 | 2020-04-28 | 国网河南省电力公司信息通信公司 | Emergent switching circuit of power communication |
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| CN110988579A (en) * | 2019-12-31 | 2020-04-10 | 国网河南省电力公司信息通信公司 | Power grid fault real-time monitoring system |
| CN111082789A (en) * | 2020-01-22 | 2020-04-28 | 国网河南省电力公司信息通信公司 | Emergent switching circuit of power communication |
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Application publication date: 20190827 |