CN205986862U - Device of power line carrier communication test - Google Patents
Device of power line carrier communication test Download PDFInfo
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- CN205986862U CN205986862U CN201621070811.XU CN201621070811U CN205986862U CN 205986862 U CN205986862 U CN 205986862U CN 201621070811 U CN201621070811 U CN 201621070811U CN 205986862 U CN205986862 U CN 205986862U
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- carrier signal
- power line
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- selecting
- noise
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Abstract
The utility model provides a device of power line carrier communication test, includes: alternating current input unit for connect the power line, exchange to direct current translation unit for it supplies with to provide DC power supply, carrier signal frequency -selecting and coupling unit for carry out frequency -selecting and coupling processing to carrier signal on the power line and noise, rectified output carrier wave peak value unit for carry out full wave rectification to this the carrier signal frequency -selecting and the output of coupling unit and handle, obtain the carrier signal peak value, and amplitude comparison and indicating units for carry out the comparison with predetermined relatively threshold value, comparative result drive pilot lamp is with the state of instructing out carrier signal and the state of noise. The utility model discloses can great convenient power line carrier communication network lay the expansion.
Description
Technical field
This utility model is related to communication auxiliary equipment, especially relates to power line carrier communication auxiliary equipment.
Background technology
PLC（Power line carrier communication, power line carrier communication）It is a kind of defeated using electric power
Electric line is as the communication technology of communications carrier.Because electric power transmission line possesses very firm supporting construction, and set up two
The above power transmission line of bar, thus while conveying power current using power transmission line, the transmission carrier signal of use, not only economical but also reliable.
At present, PLC is widely used in the occasions such as electric energy meter intelligent meter data recording, the management of power use, smart home, gate inhibition's security protection, and it is Electricity Department
The preferential peculiar means of communication adopting of door.
PLC is by the use of existing low-voltage network as transmission medium, realizes a kind of handss that data transfer and information exchange
Section.When power application line communication mode sends data, transmitter first modulates data on a high frequency carrier, then through overpower
It is coupled on electric lines of force by termination power after amplification.Signal band peak-to-peak threshold voltage is usually no more than 10V, thus without to electricity
Line of force road and power consumer have undesirable effect.
Currently, PLC is applied on a large scale, the technical staff servicing around it and technical equipment is also substantial amounts of gushes
Existing.In power-line carrier network laying and debugging process, engineers and technicians need to help its analysis existing by professional equipment
The situation of field and problem, for example：The professional equipments such as power line carrier analyser are provided with this function.On the one hand, these work(are realized
Can instrument volume larger, need to carry out back work by other equipments such as such as PCs, data storage, compare data etc..
On the other hand, the instrument realizing these functions is that in power line carrier communication network laying and debugging process, necessary professional test sets
Standby, they even can observe and collect the carrier data of electrical network for a long time, provides the prioritization scheme of power grid quality.
Although, the debugging measuring apparatus of specialty can provide ratio more rich parameter, so that engineers and technicians are joined
Examine application, for example：Power line impedance, signal noise ratio, signal intensity, signal attenuation etc., these parameters are for scene application
There is very big reference value, engineers and technicians can be allowed to have quality and quantity for the site of deployment situation of power line carrier
Understand, contribute to being smoothed out of power carrier deployment.But, operation is more complicated mostly for this kind equipment, needs engineering technology
Personnel have higher Professional knowledge and certain Parameter sensitivity, and this kind equipment generally requires to carry out backman by PC
Make.However, the debugging of carrier communication and site of deployment situation are complicated, it is unfavorable for that the measuring apparatus of specialty launch test.
When power line carrier communication is widely applied AMI (the Advanced Metering of intelligent electric meter management
Infrastructure, senior measurement system) system, it is a very big system, can manage into below single concentrator
Hundred thousands of pieces of intelligent electric meters.Especially in underdeveloped area, the distance of ammeter and concentrator can be very remote, in this case disposes
Power line carrier communication network network, needs the professional equipment putting into substantial amounts of engineering staff to be debugged, and is surveyed using professional carrier wave
Examination equipment needs the higher engineers and technicians of Professional knowledge, and the laying being so highly detrimental to network launches.
Utility model content
Technical problem to be solved in the utility model is to overcome the shortcomings of existing for above-mentioned prior art, and proposes one
Plant the device of power line carrier communication test, the laying being capable of significantly convenient power line carrier communication network network launches.
This utility model is directed to above-mentioned technical problem and proposes a kind of device of power line carrier communication test, including:Exchange
Input block, for connecting electric lines of force；AC to DC converting unit, for providing direct-current power supply；Carrier signal frequency-selecting
With coupling unit, for frequency-selecting and coupling processing are carried out to the carrier signal on electric lines of force and noise；Rectification outgoing carrier peak value
Unit, for carrying out all wave rectification process to the output of this carrier signal frequency-selecting and coupling unit, obtains carrier signal peak value；With
And amplitude com parison and indicating member, for being compared with the default threshold value that compares, comparative result drives display lamp, to indicate
The state of carrier signal and the state of noise.
In certain embodiments, this amplitude com parison and indicating member include multichannel comparator, and every road comparator is used for should
Carrier signal peak value compare threshold value default with is compared；And multichannel display lamp, every road display lamp is corresponding to a road
The output of comparator.
In certain embodiments, the comparison threshold increment change of these comparators；These display lamp word orders；Wherein,
Flicker illuminating state and the carrier signal on electric lines of force of continuously arranged display lamp intensity corresponding, continuously arranged finger
Show that the stable illuminating state of lamp is corresponding with the intensity of the noise on electric lines of force.
In certain embodiments, this carrier signal frequency-selecting and coupling unit are included for being filtered the bandpass filtering processing
Device and the isolating transformer for carrying out isolation coupling process；Wherein, the frequency band range of this band filter be set to 3KHz～
95KHz.
In certain embodiments, also include：Carrier signal bnc interface output unit, for by this carrier signal frequency-selecting with
A bnc interface is delivered in the output of coupling unit, so that external equipment utilizes.
Compared with prior art, the device of power line carrier communication test of the present utility model, by dexterously by electric power
Carrier signal on line and noise processed obtain carrier signal peak value, then this carrier signal peak value is delivered to comparator, and default
Comparison threshold value be compared, and then drive display lamp with comparative result, to indicate the state of carrier signal and noise
State, the laying being capable of significantly convenient power line carrier communication network network launches.
Brief description
Fig. 1 is that the block diagram of the device embodiment of power line carrier communication test of the present utility model is illustrated.
Fig. 2 is that the circuit of carrier signal frequency-selecting and coupling unit in this utility model embodiment is illustrated.
Fig. 3 is that the block diagram of amplitude com parison and indicating member in this utility model embodiment is illustrated.
Fig. 4 is that the circuit of a road amplitude com parison and instruction in this utility model embodiment is illustrated.
Wherein, description of reference numerals is as follows:Device 1 AC input cell 2 of 10 power line carrier communication tests is handed over
Flow to DC conversion unit 3 carrier signal frequency-selecting and coupling unit 4 rectification outgoing carrier peak cell 5 amplitude com parison and
Indicating member 6 carrier signal bnc interface output unit.
Specific embodiment
Below in conjunction with the accompanying drawing of this specification, further elaboration is given to preferred embodiment of the present utility model.
The utility model proposes a kind of method of power line carrier communication test, by the carrier signal on electric lines of force and noise
It is coupled into comparator, by being compared with the default threshold value that compares, can indicate that the state of carrier signal and noise
State, carries out efficient carrier detection and amplitude assessment at carrier communication scene.Specifically, this utility model method includes：
Carrier signal on electric lines of force and noise are first carried out frequency-selecting and coupling processing, then carries out all wave rectification process, obtain carrier wave letter
Number peak value；This carrier signal peak value is delivered to comparator, is compared with the default threshold value that compares；Driven with comparative result and refer to
Show lamp, to indicate the state of carrier signal and the state of noise.
Referring to Fig. 1, Fig. 1 is that the block diagram of the device embodiment of power line carrier communication test of the present utility model is illustrated.This
Utility model proposes a kind of device 10 of power line carrier communication test, and it includes：AC input cell 1, AC to DC turns
Change unit 2, carrier signal frequency-selecting and coupling unit 3, rectification outgoing carrier peak cell 4, amplitude com parison and indicating member 5 and load
Ripple signal bnc interface output unit 6.
This AC input cell 1 is in order to realize the connection of this device 10 and electric lines of force AC.Illustratively, this exchange input is single
Unit 1 can be a power plug, can be inserted in a power receptacle, so that the electric power of this device 10 and low-voltage power supply network
Line AC connects together.
This AC-to DC converting unit 2 is used for realizing the direct current supply to whole device 10.In the present embodiment, this friendship
Flow to the Switching Power Supply that DC conversion unit 2 is isolated for flyback.This AC-to DC converting unit 2 is via this AC input cell
1 electrical network alternating current.The voltage range of this AC-to DC converting unit 2 is 85Vac to 440Vac, can be directly accessed three and intersect
Voltage between the phase of stream electricity and phase.Switch Power Transformer is inputted, through PWM switch core after the rectified filtering of alternating current
Piece.Switch Power Transformer primary side exports+16V DC source.+ 16V direct current output process is made up of manostat and optocoupler
Feedback circuit controls PWM switch chip, reaches stable direct current output.
This carrier signal frequency-selecting and coupling unit 3, using LC band filter frequency-selective network, to the signal on electric lines of force AC
Carry out bandpass filtering, the carrier signal chosen in frequency band enters isolation coupling transformator, and the secondary from isolation coupling transformator
Isolation and amplifier.Referring to Fig. 2, Fig. 2 is that the circuit of carrier signal frequency-selecting and coupling unit in this utility model embodiment is illustrated.At this
Device 10 be connected with electric lines of force AC access alternating current while, this device 10 also can with electric lines of force AC on carrier signal and noise
Connect.Carrier signal first has to the band filter through being made up of electric capacity C2 and inductance L1.This band filter only allows certain
Signal in fixed frequency band passes through.Then, the power line carrier signal after this band filter frequency-selecting, delivers to isolation coupling and becomes
The primary of the T1 of depressor, then by the power line carrier signal after the secondary output isolation of the T1 of isolation coupling transformator.
Consider：Power line carrier signal has different modulation systems, and common modulation system includes：IEC61334 S-
FSK modulation, PRIME OFDM modulation, G3 OFDM modulation, G3-FCC OFDM modulation.The frequency band range of power line carrier signal
It is usually 3KHz～95KHz.Therefore, the frequency band range of this band filter is designed as 3KHz～95KHz by this utility model, depending on
Signal in this frequency band range is carrier signal.In the present embodiment, the value of the inductance L1 of this band filter is 10uH, should
The value of the electric capacity C2 of band filter is 0.22uF.This isolation coupling transformator T1 can allow for the normal of the signal of 100KHz
Transmission.Specifically, the two ends of the armature winding of the T1 of this isolation coupling transformator and the live wire of low voltage electric network and zero line phase respectively
Even；One end ground connection of the secondary windings of the T1 of this isolation coupling transformator, the other end exports to this rectification via capacitance C1
Power line carrier signal PLC_Signal after carrier peak value unit 4 output isolation.
This rectification outgoing carrier peak cell 4 is used for for the AC carrier signal PLC_Signal of pulsation carrying out all wave rectification
Afterwards, outgoing carrier signal peak PLC_RMS gives this amplitude com parison and indicating member 5.Because carrier signal PLC_Signal is to hand over
Stream signal, its reference ground relatively is all distributed up and down it is impossible to directly be compared.Accordingly, it would be desirable to the carrier signal warp by exchange
Cross all wave rectification, obtain carrier signal peak value PLC_RMS.
It is noted that because noise rectification can be exported to this amplitude com parison and indicating member 5 by all wave rectification simultaneously,
Therefore it is changed into square wave that pulse, single direction through the carrier signal after over commutation.Wherein, the high level of this square wave depends on
The amplitude of electric lines of force AC carrier signal（It is superimposed with the noise amplitude on electric lines of force AC）, the low level of this square wave is depending on electric power
The amplitude of noise on line AC.That is, the carrier signal of more high-amplitude occurs on lasting noise, this and actual
Electric lines of force AC field condition matches.
Referring to Fig. 3, Fig. 3 is that the block diagram of amplitude com parison and indicating member in this utility model embodiment is illustrated.This Amplitude Ration
Relatively and carrier signal peak value PLC_RMS is delivered to eight road comparators by indicating member 5, to compare threshold value equal for each of each comparator
It is to pass through+16V DC source to provide through electric resistance partial pressure.Eight comparative results correspond respectively to eight comparative result instructions.
In the present embodiment, this amplitude com parison and indicating member 5 select two four-way voltage comparator chip LM339 to come
Realize eight tunnels to compare.Specifically, the comparison threshold value of first comparator BJ1 is 0.5V, and its comparative result drives strongest to refer to
Show lamp ZS1；The comparison threshold value of the second comparator BJ2 is 1.0V, and its comparative result drives second-order intensity display lamp ZS2；3rd ratio
Comparison threshold value compared with device BJ3 is 1.5V, and its comparative result drives three-level strong indicating lamp ZS3；The comparison threshold of the 4th comparator BJ4
It is worth for 2.0V, its comparative result driving level Four strong indicating lamp ZS4；The comparison threshold value of the 5th comparator BJ5 is 2.5V, and it compares
Result drives Pyatyi strong indicating lamp ZS5；The comparison threshold value of the 6th comparator BJ6 is 3.0V, and its comparative result drives six grades strong
Degree display lamp ZS6；The comparison threshold value of the 7th comparator BJ7 is 5.0V, and its comparative result drives seven grades of strong indicating lamp ZS7；The
The comparison threshold value of eight comparator BJ8 is 7.0V, and its comparative result drives eight grades of strong indicating lamp ZS8.
Referring to Fig. 4, Fig. 4 is that the circuit of a road amplitude com parison and instruction in this utility model embodiment is illustrated.Comparator
Compare the setting of threshold value, obtained by resistance R1 and 1K Ω fixed resistance right+16V DC source partial pressure.Comparator defeated
Enter+terminate this carrier signal peak value PLC_RMS, threshold value is compared in the input of every road comparator-terminate this.Every road strong indicating lamp is adopted
Realized with a LED.When this carrier signal peak value PLC_RMS reaches the comparison threshold value of a certain setting, the output of this road comparator
Corresponding LED will be lighted indicated.In the present embodiment, the comparison threshold value of eight road comparators is incremented by change；Eight tunnels
Corresponding eight LED of strong indicating lamp are word orders successively.
In conjunction with referring to Fig. 3, the comparison threshold value of this carrier signal peak value PLC_RMS and eight grades is compared, works as load
When ripple signal peak PLC_RMS reaches the comparison threshold value of setting, it will the corresponding LED of triggering lights and indicated, represents this load
The amplitude that ripple signal peak PLC_RMS is reached, for example：This carrier signal peak value PLC_RMS is 2.1V, then strongest refers to
Show lamp ZS1, second-order intensity display lamp ZS2, three-level strong indicating lamp ZS3 and four LED corresponding to level Four strong indicating lamp ZS4
Will light, remaining（I.e.：Pyatyi strong indicating lamp ZS5, six grades of strong indicating lamp ZS6, seven grades of strong indicating lamp ZS7 and eight grades
Four LED corresponding to strong indicating lamp ZS8）Do not work.
It is noted that because the carrier signal on electric lines of force AC is not sustainable existence, therefore can be appreciated that several
LED（Must be several LED continuous）Assume flicker state.Several LED continuous assume flicker state, represent electric lines of force
There is power line carrier communication signal in AC；The LED number of flicker is more, represents that the intensity of carrier signal is bigger.Due to electric lines of force
Noise on AC is sustainable existence within the regular hour, and the LED therefore being triggered by noise will persistently light, persistently point
Bright LED number is more, represents that the noise intensity on electric lines of force AC is bigger.
According to the above Indication Characteristics with regard to carrier signal strength and noise intensity, device 10 of the present utility model is permissible
Following information is clearly provided：Noise intensity on electric lines of force AC；Multicarrier communication signal is had or not on electric lines of force AC；And electric lines of force
Carrier signal strength on AC.
This carrier signal bnc interface output unit 6, for the carrier wave exporting this carrier signal frequency-selecting with coupling unit 3
The BNC connector that signal PLC_Signal delivers to a standard is exported.This structure, can access oscillograph or sweep generator etc.
Instrument, the information such as the amplitude of carrier signal PLC_Signal, noise, frequency spectrum of observing in more detail carry out detailed analysis, convenient
Scene application.
It is noted that due to employing isolation coupling transformator T1, coupling in this carrier signal frequency-selecting and coupling unit 3
Close carrier signal PLC_Signal into this carrier signal bnc interface output unit 8 and to be AC electrically isolated from, reach insulation
Purpose.Therefore, it can directly be exported carrier signal PLC_Signal of isolation by the BNC connector of standard.
Compared with prior art, method and device of the present utility model is passed through dexterously by the carrier signal on electric lines of force AC
Obtain carrier signal peak value PLC_RMS with noise processed, then this carrier signal peak value PLC_RMS delivered to comparator BJ1-BJ8,
It is compared with the default threshold value that compares, and then drive display lamp ZS1-ZS8 with comparative result, to indicate carrier signal
State and the state of noise, the laying being capable of significantly convenient power line carrier communication network network launches.
The above is only preferred embodiment of the present utility model, is not intended to limit embodiment of the present utility model,
Those of ordinary skill in the art, according to central scope of the present utility model and spirit, can very easily carry out corresponding accommodation
Or modification, therefore protection domain of the present utility model should the protection domain required by by claims be defined.
Claims (5)
1. a kind of device of power line carrier communication test is it is characterised in that include:AC input cell, for connecting electric power
Line；AC to DC converting unit, for providing direct-current power supply；Carrier signal frequency-selecting and coupling unit, for electric power
Carrier signal on line and noise carry out frequency-selecting and coupling processing；Rectification outgoing carrier peak cell, for this carrier signal
Frequency-selecting carries out all wave rectification process with the output of coupling unit, obtains carrier signal peak value；And amplitude com parison and indicating member,
For being compared with the default threshold value that compares, comparative result drives display lamp, to indicate state and the noise of carrier signal
State.
2. according to the power line carrier communication test described in claim 1 device it is characterised in that this amplitude com parison and instruction
Unit includes multichannel comparator, and every road comparator is used for comparing default with one for this carrier signal peak value threshold value and being compared
Relatively；And multichannel display lamp, every road display lamp is corresponding to the output of a road comparator.
3. according to the power line carrier communication test described in claim 2 device it is characterised in that the comparison of these comparators
Threshold increment changes；These display lamp word orders；Wherein, on the flicker illuminating state of continuously arranged display lamp and electric lines of force
Carrier signal intensity corresponding, the intensity of the noise on the stable illuminating state of continuously arranged display lamp and electric lines of force
Corresponding.
4. according to the power line carrier communication test described in claim 1 device it is characterised in that this carrier signal frequency-selecting with
Coupling unit is included for being filtered the band filter and the isolating transformer for carrying out isolation coupling process that process；Its
In, the frequency band range of this band filter is set to 3KHz～95KHz.
5. the device of the power line carrier communication test described in foundation any one of Claims 1-4 is it is characterised in that also include：
Carrier signal bnc interface output unit, for a bnc interface is delivered in the output of this carrier signal frequency-selecting and coupling unit,
So that external equipment utilizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621070811.XU CN205986862U (en) | 2016-09-22 | 2016-09-22 | Device of power line carrier communication test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621070811.XU CN205986862U (en) | 2016-09-22 | 2016-09-22 | Device of power line carrier communication test |
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| Publication Number | Publication Date |
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| CN205986862U true CN205986862U (en) | 2017-02-22 |
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ID=58040266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621070811.XU Active CN205986862U (en) | 2016-09-22 | 2016-09-22 | Device of power line carrier communication test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414860A (en) * | 2018-03-06 | 2018-08-17 | 深圳创维数字技术有限公司 | Method for testing performance, device and the readable storage medium storing program for executing of high frequency cable |
| CN109279330A (en) * | 2017-07-21 | 2019-01-29 | 成都长城开发科技有限公司 | The conveying device of printed circuit board assembly |
| CN113691280A (en) * | 2021-09-18 | 2021-11-23 | 广东电网有限责任公司 | Modular carrier communication testing arrangement |
-
2016
- 2016-09-22 CN CN201621070811.XU patent/CN205986862U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279330A (en) * | 2017-07-21 | 2019-01-29 | 成都长城开发科技有限公司 | The conveying device of printed circuit board assembly |
| CN108414860A (en) * | 2018-03-06 | 2018-08-17 | 深圳创维数字技术有限公司 | Method for testing performance, device and the readable storage medium storing program for executing of high frequency cable |
| CN108414860B (en) * | 2018-03-06 | 2021-02-23 | 深圳创维数字技术有限公司 | Performance detection method and device of high-frequency cable and readable storage medium |
| CN113691280A (en) * | 2021-09-18 | 2021-11-23 | 广东电网有限责任公司 | Modular carrier communication testing arrangement |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. Address before: 611731 no.1218, Hezuo Road, high tech Zone (West District), Chengdu, Sichuan Province Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee after: Chengdu Great Wall Development Technology Co.,Ltd. Address before: 611731 No. 99, Tianquan Road, high tech Zone, Chengdu, Sichuan Patentee before: CHENGDU GREAT WALL DEVELOPMENT TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |