CN207099071U - A kind of electric line carrier communication tests programmable attenuator - Google Patents
A kind of electric line carrier communication tests programmable attenuator Download PDFInfo
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- CN207099071U CN207099071U CN201721050274.7U CN201721050274U CN207099071U CN 207099071 U CN207099071 U CN 207099071U CN 201721050274 U CN201721050274 U CN 201721050274U CN 207099071 U CN207099071 U CN 207099071U
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- attenuator
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- filter module
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Abstract
The utility model discloses a kind of electric line carrier communication test programmable attenuator, including the first carrier isolation filter module being sequentially connected, first attenuator, second carrier wave isolation filter module, second attenuator, 3rd carrier wave isolation filter module, and control device, control device and the first attenuator, second attenuator wire connects, first carrier isolation filter module, second carrier wave isolation filter module, 3rd carrier wave isolation filter module includes cutting out ripple signal coupling circuit, filter circuit and zero cross detection circuit, first attenuator, second attenuator includes integrated regulator, attenuator circuit and D/A change-over circuits.By the utility model solve the carrier attenuation device of prior art existing for carrier wave be only capable of realizing that single carrier wave frequency signal is decayed, it is fixed to carrier signal pad value, it is not program-controlled, during test receiver performance, need constantly to change the attenuator module of fixed attenuation value, the problems such as test process is cumbersome and operating efficiency is low.
Description
Technical field
It the utility model is related to power carrier communication technical field of measurement and test, more particularly to a kind of test of electric line carrier communication
Programmable attenuator.
Background technology
, it is necessary to test function and the communication of low-voltage powerline carrier communication unit among low-voltage collecting meter reading integrated test system
Ability, receptivity test are the important indicators of ability to communicate, are realized at present using carrier attenuation device to carrier communication unit
Receiver performance is tested, and the carrier wave of prior art is only capable of realizing that single carrier wave frequency signal is decayed, and is to carrier signal pad value
It is fixed, it is not program-controlled, it is necessary to constantly change the attenuator module of fixed attenuation value, test process during test receiver performance
Cumbersome and operating efficiency is low.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of electric line carrier communication test is program control to decline
Subtract device.
The technical solution of the utility model is as follows：A kind of electric line carrier communication tests programmable attenuator, including first carries
Ripple isolation filter module, the first attenuator, the second carrier wave isolation filter module, the second attenuator, the 3rd carrier wave isolation filter mould
Block and control device, the first carrier isolation filter module, the first attenuator, the second carrier wave isolation filter module, second decline
Subtract device, the 3rd carrier wave isolation filter module is sequentially connected, the control device and the first attenuator, the second attenuator wire company
Connect, the first carrier isolation filter module, the second carrier wave isolation filter module, the 3rd carrier wave isolation filter module include cutting out
Ripple signal coupling circuit, filter circuit and zero cross detection circuit, the sanction ripple signal coupling circuit are examined with filter circuit and zero passage
Slowdown monitoring circuit wire connects, and first attenuator, the second attenuator include integrated regulator, attenuator circuit and D/A conversions
Circuit, the integrated regulator are connected with attenuator circuit and D/A change-over circuit wires, the first carrier isolation filter module
Filter circuit, the attenuator circuit of the first attenuator and the sanction ripple signal coupling circuit of the second carrier wave isolation filter module lead to successively
Cross wire connection, the filter circuit of the second carrier wave isolation filter module, the attenuator circuit and the 3rd carrier wave of the second attenuator
The filter circuit of isolation filter module passes sequentially through wire connection, the zero passage detection electricity of the first carrier isolation filter module
Road, the D/A change-over circuits of the first attenuator, zero cross detection circuit, the D/A of the second attenuator of the second carrier wave isolation filter module
Change-over circuit and the zero cross detection circuit of the 3rd carrier wave isolation filter module pass sequentially through wire connection.
Further, the control device includes controller and program control host computer, and the program control host computer is led with controller
Line is connected, and the controller is connected with the D/A change-over circuits of the first attenuator and the D/A change-over circuit wires of the second attenuator.
Further, the controller is connected by a relay with first attenuator and the second attenuator respectively.
Further, communicated between the controller and program control host computer using 485 lines.
Relative to prior art, the beneficial effects of the utility model are：The utility model can be to 220V forceful electric power electric power
Line carrier signal carries out program control decay, attenuation range 0-120db, step value >=1db, when 220V power line carrier signals enter this
After device, carrier signal termination power isolates 220V forceful electric power, extracts the carrier signal without coupling, filter circuit is by carrier frequency
Rate signal is by filtering out clutter, the harmonic signal of other frequencies, then carrier signal access attenuator circuit；By program control upper
Machine inputs corresponding attenuation value and sent to controller, after controller reception detects attenuation value control signal, control decay
Different FETs conducting in circuit, make the resistor network access circuit of corresponding different resistances, carrier signal is realized and declined
Subtract, the utility model can carry out signal attenuation, this reality by changing the PLC values of filter circuit to different filtered frequency signals
The carrier wave existing for the new carrier attenuation device for solving prior art is only capable of realizing that single carrier wave frequency signal is decayed, to carrier wave
Signal attenuation value be it is fixed, it is not program-controlled, it is necessary to constantly change the attenuator mould of fixed attenuation value during test receiver performance
Block, the problems such as test process is cumbersome and operating efficiency is low.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
With reference to figure 1, a kind of electric line carrier communication test programmable attenuator provided by the utility model, including first carrier
Isolation filter module, the first attenuator, the second carrier wave isolation filter module, the second attenuator, the 3rd carrier wave isolation filter module
And control device, first carrier isolation filter module, the first attenuator, the second carrier wave isolation filter module, the second attenuator,
Three carrier wave isolation filter modules are sequentially connected, and control device is connected with the first attenuator, the second attenuator wire, first carrier every
Include cutting out ripple signal coupling circuit, filter from filtration module, the second carrier wave isolation filter module, the 3rd carrier wave isolation filter module
Wave circuit and zero cross detection circuit, cut out ripple signal coupling circuit and be connected with filter circuit and zero cross detection circuit wire, first declines
Subtracting device, the second attenuator includes integrated regulator, attenuator circuit and D/A change-over circuits, integrated regulator and decay electricity
Road connects with D/A change-over circuit wires, the filter circuit of first carrier isolation filter module, the attenuator circuit of the first attenuator and
The sanction ripple signal coupling circuit of second carrier wave isolation filter module passes sequentially through wire connection, the second carrier wave isolation filter module
The filter circuit of filter circuit, the attenuator circuit of the second attenuator and the 3rd carrier wave isolation filter module passes sequentially through wire company
Connect, the zero cross detection circuit of first carrier isolation filter module, the D/A change-over circuits of the first attenuator, the isolation filter of the second carrier wave
The zero passage detection of the zero cross detection circuit of ripple module, the D/A change-over circuits of the second attenuator and the 3rd carrier wave isolation filter module
Circuit passes sequentially through wire connection.The the second carrier wave isolation filter module set between first attenuator and the second attenuator, makes
Two separate modes of attenuator circuit turns into independent attenuation units, does not interfere with each other, and solves between attenuator and attenuation occurs
The problem of being overlapped mutually, external circuit at the same time can also be avoided to influence attenuation accuracy.
Control device includes controller and program control host computer, and program control host computer is connected with controller wire, controller and
The D/A change-over circuits wire connection of the D/A change-over circuits and the second attenuator of one attenuator.Pass through two D/A change-over circuits teams
Two attenuators are controlled, and reduce workload during staff's debugging；It is right under high and low temperature environment state to reduce simultaneously
The influence of attenuation.
Controller is connected by a relay with the first attenuator and the second attenuator respectively.When relay is connected, phase
The attenuator answered is shorted, and is cut off equivalent to attenuator from system, and controller is connected with program control host computer with 485 lines, from
And can be by controller come the switch of control relay, so as to reach the effect of access and the excision of control attenuator.
Control method of the present utility model, including：
After step 1, system initialization, attenuation value is set by program control host computer；
After step 2, controller receive attenuation value, attenuator circuit is controlled by two D/A change-over circuits teams, realization declines
Subtract；
Whether step 3, detected carrier signal are attenuated, and are, the carrier signal after decay coupled to power line and is exported
To tested carrier equipment, step 1 is otherwise returned to；
Whether step 4, the tested carrier equipment of detection receive the carrier signal after decay, are then return to step 1 and according to step
Enter value for repeat step 1-4 after 1-120db increase attenuation values, if tested carrier equipment can not receive the carrier wave letter after decay
Number, then obtain the sensitivity of tested carrier equipment.
In summary, program control decay, decay can be carried out to 220V forceful electric power power line carrier signal by the utility model
Scope 0-120db, step value >=1db, after 220V power line carrier signals enter the present apparatus, carrier signal termination power will
220V forceful electric power is isolated, and extracts the carrier signal without coupling, filter circuit is by carrier frequency signaling by filtering out other frequencies
Clutter, harmonic signal, then carrier signal access attenuator circuit；By program control host computer input corresponding attenuation value send to
Controller, after controller reception detects attenuation value control signal, FET conducting different in attenuator circuit is controlled, is made
The resistor network access circuit of corresponding different resistances, realizes to carrier signal and decays, the utility model is by changing filtered electrical
The PLC values on road, signal attenuation can be carried out to different filtered frequency signals.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
1. a kind of electric line carrier communication tests programmable attenuator, it is characterised in that：Including first carrier isolation filter module,
One attenuator, the second carrier wave isolation filter module, the second attenuator, the 3rd carrier wave isolation filter module and control device, it is described
First carrier isolation filter module, the first attenuator, the second carrier wave isolation filter module, the second attenuator, the isolation of the 3rd carrier wave
Filtration module is sequentially connected, and the control device is connected with the first attenuator, the second attenuator wire, the first carrier isolation
Filtration module, the second carrier wave isolation filter module, the 3rd carrier wave isolation filter module include cutting out ripple signal coupling circuit, filtering
Circuit and zero cross detection circuit, the sanction ripple signal coupling circuit is connected with filter circuit and zero cross detection circuit wire, described
First attenuator, the second attenuator include integrated regulator, attenuator circuit and D/A change-over circuits, the integrated electricity of the voltage stabilizing
Road is connected with attenuator circuit and D/A change-over circuit wires, the filter circuit of the first carrier isolation filter module, the first decay
The attenuator circuit of device and the sanction ripple signal coupling circuit of the second carrier wave isolation filter module pass sequentially through wire and connected, and described second
The filtered electrical of the filter circuit of carrier wave isolation filter module, the attenuator circuit of the second attenuator and the 3rd carrier wave isolation filter module
Road passes sequentially through wire connection, the D/A conversions of the zero cross detection circuit, the first attenuator of the first carrier isolation filter module
Circuit, the zero cross detection circuit of the second carrier wave isolation filter module, the D/A change-over circuits of the second attenuator and the isolation of the 3rd carrier wave
The zero cross detection circuit of filtration module passes sequentially through wire connection.
A kind of 2. electric line carrier communication test programmable attenuator according to claim 1, it is characterised in that：The control
Device includes controller and program control host computer, and the program control host computer is connected with controller wire, and the controller declines with first
Subtract the D/A change-over circuits wire connection of the D/A change-over circuits and the second attenuator of device.
A kind of 3. electric line carrier communication test programmable attenuator according to claim 2, it is characterised in that：The control
Device is connected by a relay with first attenuator and the second attenuator respectively.
A kind of 4. electric line carrier communication test programmable attenuator according to claim 2, it is characterised in that：The control
Communicated between device and program control host computer using 485 lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721050274.7U CN207099071U (en) | 2017-08-21 | 2017-08-21 | A kind of electric line carrier communication tests programmable attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721050274.7U CN207099071U (en) | 2017-08-21 | 2017-08-21 | A kind of electric line carrier communication tests programmable attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207099071U true CN207099071U (en) | 2018-03-13 |
Family
ID=61542220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721050274.7U Active CN207099071U (en) | 2017-08-21 | 2017-08-21 | A kind of electric line carrier communication tests programmable attenuator |
Country Status (1)
| Country | Link |
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| CN (1) | CN207099071U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130502A (en) * | 2019-12-28 | 2020-05-08 | 苏州摩联通信技术有限公司 | Attenuator control circuit |
| CN112910503B (en) * | 2019-11-19 | 2022-10-11 | 华为技术有限公司 | Power distribution topological structure identification method and device |
-
2017
- 2017-08-21 CN CN201721050274.7U patent/CN207099071U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910503B (en) * | 2019-11-19 | 2022-10-11 | 华为技术有限公司 | Power distribution topological structure identification method and device |
| CN111130502A (en) * | 2019-12-28 | 2020-05-08 | 苏州摩联通信技术有限公司 | Attenuator control circuit |
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