CN109921828A - One kind being based on narrowband low-voltage powerline carrier communication cruising inspection system and method - Google Patents
One kind being based on narrowband low-voltage powerline carrier communication cruising inspection system and method Download PDFInfo
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- CN109921828A CN109921828A CN201910027329.XA CN201910027329A CN109921828A CN 109921828 A CN109921828 A CN 109921828A CN 201910027329 A CN201910027329 A CN 201910027329A CN 109921828 A CN109921828 A CN 109921828A
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- flux signal
- electric flux
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Abstract
The present invention relates to one kind to be based on narrowband low-voltage powerline carrier communication cruising inspection system, comprising: electric energy collection module, for acquiring electric flux signal；Micro controller module connects electric energy collection module, for receiving and transmitting electric flux signal；Carrier communication module connects micro controller module, for being modulated demodulation to electric flux signal, is converted into simulation electric flux signal；Filter module connects carrier communication module, for filtering out the interference signal of simulation electric flux signal；Coupling module, connects filter module, is coupled on power line for will simulate electric flux signal and transmits；Zero crossing detection module connects coupling module, for detecting the point of zero voltage moment on power line, eliminates the influence of intrinsic pulse on power line.System proposed by the present invention, inspection information is transmitted by power line, and of simple structure and low cost, deployment flexibly, is not necessarily to rewiring, can be deployed in the occasions such as the small, low-voltage power line of communications bandwidth.
Description
Technical field
The invention belongs to technical field of electric power communication, and in particular to one kind is based on the inspection of narrowband low-voltage powerline carrier communication
System and method.
Background technique
Power telecom network is the basis for supporting the reliable and stable operation of power network, and electric power communication optical cable is that power grid enterprises' transmission is each
The carrier of class production information data, electric power communication optical cable reliability of operation are directly related to power grid security, stable operation.It is true
Electric power communication optical cable running quality is protected, needs periodically to carry out periodical inspection, detection, contrasting detection data, to different to communications optical cable
Often analyse and compare with breakpoint；Optical cable bearer service information is checked.Power carrier is the distinctive communication of electric system
Mode, power carrier communication (Power LineCommunication, PLC) refers to using existing power line, passes through carrier system
Analog or digital signal is carried out to the technology of high-speed transfer, its biggest characteristic is that do not need to set up network again, as long as live wire,
It just can be carried out data transmitting.
It is most of to be completed by manual inspection or hand fit's inspection hand-held set in traditional routine inspection mode, pass through paper
The mode of matter records inspection information.In addition, usually being passed using private wire network or wireless network on the communication mode of cruising inspection system
Defeated, wire transmission is relatively reliable, and it is convenient to be wirelessly transferred.
But manual inspection mode human factor is larger, and inspection information records not in time, not comprehensively, not easy to maintain, it is desirable to look into
It is difficult to ask history information.It is high due to setting up private wire network network cost, a large amount of man power and material is needed, and right
Existing old project significantly alter increasing difficulty, and after establishing what a system, often deployment is new in systems is set
It is standby, if the band bandwidth that system sets timing communication is too small, it may cause that band bandwidth is inadequate, or even destroy original communication line
Road influences whole system work；In addition, wireless transmission is easy by surrounding environment influence, when encountering extensive object and blocking,
Signal decaying is big, poor anti jamming capability, and later maintenance cost is high.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides one kind to be carried based on narrowband low-voltage power line
Wave communication cruising inspection system and method.The technical problem to be solved in the present invention is achieved through the following technical solutions:
The embodiment of the invention provides one kind to be based on narrowband low-voltage powerline carrier communication cruising inspection system, comprising:
Electric energy collection module, for acquiring electric flux signal；
Micro controller module connects the electric energy collection module, for receiving and transmitting the electric flux signal；
Carrier communication module connects the micro controller module, for being modulated demodulation to the electric flux signal, turns
Change simulation electric flux signal into；
Filter module connects the carrier communication module, for filtering out the interference signal of the simulation electric flux signal；
Coupling module connects the filter module, carries out for the simulation electric flux signal to be coupled on power line
Transmission；
Zero crossing detection module connects the power line, for detecting the point of zero voltage moment on the power line, described in elimination
The influence of intrinsic pulse on power line.
In one embodiment of the invention, further includes: Inhibition of electrical surge module connects the micro controller module and described
Electric energy collection module, for restraining voltage surge interference；
The Inhibition of electrical surge module includes isolating transformer, multiple varistors and multiple safety capacitor interconnected.
In one embodiment of the invention, the processor of the electric energy collection module is AD71056 chip.
In one embodiment of the invention, the processor of the micro controller module is STM32F103C8T6 microcontroller
Device.
In one embodiment of the invention, the processor of the carrier communication module is ST7580 chip.
In one embodiment of the invention, the zero crossing detection module is optocoupler zero-crossing detection system.
In one embodiment of the invention, the filter module includes transmitting filter interconnected and accepts filter
Device.
In one embodiment of the invention, the transmitting filter include single order RC low-pass filter interconnected and
Second order Butterworth LPF；The receiving filter is RLC bandpass filter.
In one embodiment of the invention, the coupling module includes: transformer interconnected and LC resonance circuit.
Another embodiment of the present invention provides a kind of based on narrowband low-voltage powerline carrier communication method for inspecting, comprising:
Acquire electric flux signal；
It receives and transmits the electric flux signal；
Demodulation is modulated to the electric flux signal, generates simulation electric flux signal；
Filter out the interference signal of the simulation electric flux signal；
The simulation electric flux signal is coupled on power line and is transmitted；
The point of zero voltage moment on the power line is detected, the influence of intrinsic pulse on the power line is eliminated.
Compared with prior art, beneficial effects of the present invention:
System proposed by the present invention, transmits inspection information by power line, and electric energy collection module is by collected electric energy
Amount signal is sent to micro controller module, and micro controller module is transferred to carrier communication module, carrier communication by serial mode
Electric flux signal is carried out BPSK modulation by module, and the simulation electric flux signal formed after modulation passes through filter module and coupling module
It is coupled on power line after processing and is transmitted, of simple structure and low cost, deployment flexibly, is not necessarily to rewiring, as long as there is electricity
The line of force, so that it may it communicates, by the electricity consumption situation of terminal monitoring field device, prevents the generation of electricity stealing to a certain extent,
Electric energy energy security is protected, there is certain practical value, small communications bandwidth, low-voltage power line, old system can be deployed in
It needs to significantly alter occasion, such as the velocity-measuring system on highway, road lamp system etc..
Detailed description of the invention
Fig. 1 is a kind of transmission knot based on narrowband low-voltage powerline carrier communication cruising inspection system provided in an embodiment of the present invention
Structure schematic diagram；
Fig. 2 is a kind of reception knot based on narrowband low-voltage powerline carrier communication cruising inspection system provided in an embodiment of the present invention
Structure schematic diagram；
Fig. 3 is provided in an embodiment of the present invention a kind of unrestrained based on restraining in narrowband low-voltage powerline carrier communication cruising inspection system
Gush the circuit diagram of module；
Fig. 4 is provided in an embodiment of the present invention a kind of based on microcontroller in narrowband low-voltage powerline carrier communication cruising inspection system
The connection relationship diagram of device module and carrier communication module；
Fig. 5 is provided in an embodiment of the present invention a kind of based on microcontroller in narrowband low-voltage powerline carrier communication cruising inspection system
The connection relationship diagram of device and electric energy collection module；
Fig. 6 is a kind of circuit based on narrowband low-voltage powerline carrier communication cruising inspection system provided in an embodiment of the present invention
Figure；
Fig. 7 is provided in an embodiment of the present invention a kind of based on zero passage inspection in narrowband low-voltage powerline carrier communication cruising inspection system
Survey the circuit diagram of module；
Fig. 8 is that a kind of process based on narrowband low-voltage powerline carrier communication method for inspecting provided in an embodiment of the present invention is shown
It is intended to.
Specific embodiment
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to
This.
Embodiment one
Referring to Figure 1 and Fig. 2, Fig. 1 are provided in an embodiment of the present invention a kind of based on narrowband low-voltage powerline carrier communication
The transmission structural schematic diagram of cruising inspection system, Fig. 2 are provided in an embodiment of the present invention a kind of logical based on narrowband low voltage power line carrier
Believe the reception structural schematic diagram of cruising inspection system.
It is provided in an embodiment of the present invention a kind of based on narrowband low-voltage powerline carrier communication cruising inspection system, comprising:
Electric energy collection module, for acquiring electric flux signal；
Micro controller module connects electric energy collection module, for receiving and transmitting electric flux signal；
Carrier communication module, connection micro controller module are converted into simulating for being modulated demodulation to electric flux signal
Electric flux signal；
Filter module connects carrier communication module, for filtering out the interference signal of simulation electric flux signal；
Coupling module, connects filter module, is coupled on power line for will simulate electric flux signal and transmits；
Zero crossing detection module connects power line, for detecting the point of zero voltage moment on power line, eliminates intrinsic on power line
The influence of pulse.
Specifically, cruising inspection system proposed by the present invention is mainly used for acquiring the electric flux of industrial field device, due to some
Field device is placed in unattended place, cannot rely on artificial monitoring.This cruising inspection system collects electric energy after electric flux
Amount is transmitted to terminal, and user can estimate the power consumption situation of field device by terminal monitoring, to a certain extent
Can be to avoid stealing the occurrence of.
Equipment disposes electric energy collection module at the scene, and collected electric flux signal is sent to micro-control by electric energy collection module
Device module processed, micro controller module are transferred to carrier communication module by serial mode, and carrier communication module is by electric flux signal
BPSK modulation is carried out, the simulation electric flux signal formed after modulation is coupled to electric power after filter module and coupling module processing
It is transmitted on line, zero crossing detection module, for removing intrinsic pulse on power line in simulation electric flux signals transmission
It influences.
The simulation electric flux signal of transmission on recipient, power line passes after coupling module and filter module processing
Defeated to arrive carrier communication module, carrier communication module demodulates simulation electric flux signal, by the digital electric flux signal of formation
Send controller module to, controller module is connect by serial mode with computer, and user opens a serial port terminal on computers
It can check the service condition of electricity.
Particularly, in the specific embodiment of the invention, further includes: Inhibition of electrical surge module connects micro controller module and electric energy
Acquisition module, for restraining voltage surge interference；
Inhibition of electrical surge module includes isolating transformer, multiple varistors and multiple safety capacitor interconnected.
Specifically, as shown in figure 3, inhibiting surge module isolating transformer interconnected, multiple varistors and multiple
Safety capacitor.Fuse is F301, can use the glass tube fuse of 250V 1A, varistor R319, R324, R325
MOV varistor 471KD10 can be used, when input voltage is excessively high, the resistance value of varistor R319, R324, R325 can nothings
It is poor small, so that electric current can be very big, cause blown fuse, and then protect circuit.Isolating transformer is T302, is isolated using 1:1
Transformer, i.e. input 220V, export 220V.It is being electrically isolation due to outputting and inputting, is playing the role of Electrical Safety.Peace
Advising capacitor is C311, C312, C313, the safety capacitor of 275V 100nF can be used, due in conventional capacitive after a loss of power its
The charge in portion can retain a period of time, if accidentally touched, may be electrically shocked, and safety capacitor after a loss of power can be quick
Electric discharge, can be effectively avoided electric shock.Meanwhile this 3 safety capacitors all play filter action, wherein safety capacitor C312 is filter
Except DM EMI, safety capacitor C311 and the interference of safety capacitor C313 filtering common mode.
Particularly, in the specific embodiment of the invention, the processor of electric energy collection module is AD71056 chip.
Particularly, in the specific embodiment of the invention, the processor of micro controller module is STM32F103C8T6 microcontroller
Device.
Particularly, in the specific embodiment of the invention, the processor of carrier communication module is ST7580 chip.
Specifically, as shown in Figure 4 and Figure 5, the processor AD71056 chip of electric energy collection module acquires electric flux signal,
Realize the acquisition of electric energy.The processor STM32F103C8T6 microcontroller of micro controller module receives the acquisition of AD71056 chip
The electric flux signal arrived.
The processor of carrier communication module selects ST7580 chip, and the amplifying circuit of ST7580 chip interior can be to electric flux
Signal carries out power amplification, and amplifying circuit has input impedance height, output impedance, steady performance.
STM32F103C8T6 microcontroller and ST7580 chip use serial communication mode, the PC13 of STM32F103C8T6
The reception electric flux signal enable end of ST7580 chip is controlled, the transmission electric flux signal that PC14 controls ST7580 chip is enabled
End.Micro controller module is the control core of whole system, is responsible for the control and scheduling of whole system, it is desirable that have stronger processing
Ability, therefore the STM32F103C8T6 for selecting cost performance high.The modulation /demodulation of electric flux signal needs carrier communication module complete
At, it is desirable that there is anti-interference ability, and integrated level is high, therefore has selected ST7580 chip.
Particularly, in the specific embodiment of the invention, zero crossing detection module is optocoupler zero-crossing detection system.
Specifically, as shown in fig. 6, since the alternating current on power line is there are intrinsic pulse, noise is most at the time of zero point
It is small, therefore joined zero cross detection circuit, specific implementation uses optocoupler zero passage detection method.In a week of 220V alternating current
In phase, it may appear that zero point twice.Opening and closing by control optocoupler, to control triode Q1, occurs on resistance R4
Low and high level, then ST7580 chip judges the zero point moment according to rising edge or failing edge, and wherein triode Q1 is used
BMPT3904 transistor, resistance R4 use the Ohmic resistance of 1M.
Particularly, in the specific embodiment of the invention, filter module includes transmitting filter interconnected and accepts filter
Device.
Particularly, in the specific embodiment of the invention, transmitting filter include single order RC low-pass filter interconnected and
Second order Butterworth LPF；Receiving filter is RLC bandpass filter.
Specifically, as shown in fig. 7, filter module includes transmitting filter and receiving filter interconnected；Wherein, it sends out
Sending filter includes single order RC low-pass filter interconnected and second order Butterworth LPF, can effectively filter out electric current
Signal high frequency components, resistance R14 and capacitor C10 form single order RC low-pass filter, cutoff frequencyResistance R14 uses the Ohmic resistance of 1K5, and capacitor C10 uses the capacitor of 1nF；Resistance
R15, resistance R16, capacitor C2 and capacitor C9 form second order Butterworth LPF, cutoff frequencyResistance R15 uses the Ohmic resistance of 1K5, and resistance R16 uses the Europe of 22K
Nurse resistance, capacitor C2 and capacitor C9 are all made of the capacitor of 100pF.
Receiving filter is RLC bandpass filter, and resistance R17, inductance L2 and capacitor C12 realize RLC bandpass filter, in
Frequency of heartResistance R17 uses the Ohmic resistance of 150R, and inductance L2 chooses the electricity of 220uH
Sense, capacitor C12 are all made of the capacitor of 25V 18nF.
Particularly, in the specific embodiment of the invention, coupling module includes: transformer interconnected and LC resonance circuit.
Specifically, as shown in fig. 7, coupling module includes: transformer interconnected and LC resonance circuit.Capacitor C7 and electricity
Feel L1 and form series resonant circuit, the carrier signal of other frequencies can be stopped, capacitor C7 will select the safety electricity of X-type 220nF
Hold, effectively prevent the influence of pulse, inductance L1 chooses the inductance of 50V15uH, transformer T1 for reducing access system voltage.
High-performance TVS pipe D6 and D7, which is added, can effectively inhibit surge, and D6 and D7 are all made of two pole of transient supression of SMBT6.8CA
Pipe.
Particularly, as shown in figure 8, the present invention provides one kind based on narrowband low-voltage power on the basis of the above embodiments
Line carrier communication method for inspecting, comprising:
Acquire electric flux signal；
It receives and transmits electric flux signal；
Demodulation is modulated to electric flux signal, generates simulation electric flux signal；
Filter out the interference signal of simulation electric flux signal；
Simulation electric flux signal is coupled on power line and is transmitted；
The point of zero voltage moment on power line is detected, the influence of intrinsic pulse on power line is prevented.
System proposed by the present invention, communicates inspection information by power line, and electric energy collection module is by collected electric energy
Amount signal is sent to micro controller module, and micro controller module is transferred to carrier communication module, carrier communication by serial mode
Electric flux signal is carried out BPSK modulation by module, and the simulation electric flux signal formed after modulation passes through filter module and coupling module
It is coupled on power line after processing and is transmitted, of simple structure and low cost, deployment flexibly, is not necessarily to rewiring, as long as there is electricity
The line of force, so that it may it communicates, by the electricity consumption situation of terminal monitoring field device, prevents the generation of electricity stealing to a certain extent,
Electric energy energy security is protected, there is certain practical value, small communications bandwidth, low-voltage power line, old system can be deployed in
It needs to significantly alter occasion, such as the velocity-measuring system on highway, road lamp system etc..
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. one kind is based on narrowband low-voltage powerline carrier communication cruising inspection system characterized by comprising
Electric energy collection module, for acquiring electric flux signal；
Micro controller module connects the electric energy collection module, for receiving and transmitting the electric flux signal；
Carrier communication module connects the micro controller module, for being modulated demodulation to the electric flux signal, is converted into
Simulate electric flux signal；
Filter module connects the carrier communication module, for filtering out the interference signal of the simulation electric flux signal；
Coupling module connects the filter module, transmits for the simulation electric flux signal to be coupled on power line；
Zero crossing detection module connects the power line, for detecting the point of zero voltage moment on the power line, eliminates the electric power
The influence of intrinsic pulse on line.
2. cruising inspection system according to claim 1, which is characterized in that further include: Inhibition of electrical surge module connects the micro-control
Device module processed and the electric energy collection module, for restraining voltage surge interference；
The Inhibition of electrical surge module includes isolating transformer, multiple varistors and multiple safety capacitor interconnected.
3. cruising inspection system according to claim 1, which is characterized in that the processor of the electric energy collection module is
AD71056 chip.
4. cruising inspection system according to claim 1, which is characterized in that the processor of the micro controller module is
STM32F103C8T6 microcontroller.
5. cruising inspection system according to claim 1, which is characterized in that the processor of the carrier communication module is ST7580
Chip.
6. system according to claim 1, which is characterized in that the zero crossing detection module is optocoupler zero-crossing detection system.
7. cruising inspection system according to claim 1, which is characterized in that the filter module includes transmission filter interconnected
Wave device and receiving filter.
8. cruising inspection system according to claim 1, which is characterized in that the transmitting filter includes: interconnected one
Rank RC low-pass filter and second order Butterworth LPF；The receiving filter is RLC bandpass filter.
9. cruising inspection system according to claim 1, which is characterized in that the coupling module includes: transformation interconnected
Device and LC resonance circuit.
10. one kind is based on narrowband low-voltage powerline carrier communication method for inspecting characterized by comprising
Acquire electric flux signal；
It receives and transmits the electric flux signal；
Demodulation is modulated to the electric flux signal, generates simulation electric flux signal；
Filter out the interference signal of the simulation electric flux signal；
The simulation electric flux signal is coupled on power line and is transmitted；
The point of zero voltage moment on the power line is detected, the influence of intrinsic pulse on power line is eliminated.
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| CN201910027329.XA CN109921828B (en) | 2019-01-11 | 2019-01-11 | Inspection system based on narrowband low-voltage power line carrier communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113395068A (en) * | 2020-03-13 | 2021-09-14 | 深圳市胜斯智能技术有限责任公司 | Electric signal acquisition device, electric signal detection device and fault indicator |
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| CN109921828B (en) | 2020-07-17 |
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