CN104038385B - Multi channel selecting attenuation network system based on relay array - Google Patents
Multi channel selecting attenuation network system based on relay array Download PDFInfo
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- CN104038385B CN104038385B CN201410239878.0A CN201410239878A CN104038385B CN 104038385 B CN104038385 B CN 104038385B CN 201410239878 A CN201410239878 A CN 201410239878A CN 104038385 B CN104038385 B CN 104038385B
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Abstract
The invention discloses a kind of multi channel selecting attenuation network system based on relay array, including power line access interface, attenuator array, relay array and control device are tested with survey access interface, power line, attenuator array is connected to power line with surveying between access interface and the tested access interface of power line, and each attenuator is tested between access interface with survey access interface and power line in power line and forms an independent two-way attenuation path；Relay array is connected with power line with the tested access interface of access interface, attenuator array and power line is surveyed, and every 2 relays are correspondingly arranged on each two-way attenuation path；Control device is connected with relay array, made according to the frequency of tested carrier equipment and default pad value control relay array open/close state corresponding to two-way attenuation path open or close.The present invention can be achieved to automatically select the attenuator being adapted with tested carrier equipment from attenuator array, easy to use, automatically switch, testing efficiency is high.
Description
Technical field
The present invention relates to attenuation network field, more particularly to a kind of multi channel selecting attenuation network system based on relay array
System.
Background technology
In carrier communication simulating network test system, either System Functional Test or communication unit performance test,
The problem of all more being bothered in the presence of one, the i.e. allocation problem on variable attenuation network.
10-500KHz, mesh are should be according to power industry and Guo Wang companies relevant criterion, low voltage power line carrier band limits
Before, tested carrier equipment supplier is a lot, and its carrier frequency, modulation system and broadband are different, with reference to shown in following table, lists
Part manufacturer production is tested the used carrier frequency of carrier equipment.
Due to the frequency characteristic of attenuation network to meet system frequency range requirement, so, with reference to upper table as can be seen that
, it is necessary to manually change when tested carrier equipment for different manufacturers or the carrier communication networking especially formed carry out normative testing
Corresponding attenuator, even in addition, the module testing of same producer, it is also desirable to select different ranges attenuator (such as 20dB,
40dB, 60dB), because producer is numerous, attenuator species, specification are also a lot, thus cause manual switching process comparatively laborious tired
It is difficult.
The content of the invention
It is contemplated that at least solve manually to change the problems such as attenuator is cumbersome difficult present in prior art.
Therefore, it is an object of the invention to provide a kind of multi channel selecting attenuation network system based on relay array, it is real
Automatically selecting for differential declines device is showed.
To achieve the above object, multi channel selecting attenuation network system of the kind provided in an embodiment of the present invention based on relay array
System, including with survey carrier equipment be connected to access power line carrier signal power line with survey access interface, and for will
Power line carrier signal after decay exports to the power line of tested carrier equipment and is tested access interface；Its improvement is, also wraps
Include：
Attenuator array, the power line is connected to surveying between access interface and the tested access interface of power line, by more
Individual attenuator composition, and each attenuator is tested between access interface in the power line with survey access interface and power line
Form an independent two-way attenuation path；
Relay array, access interface company is tested with access interface, attenuator array and power line is surveyed with the power line
Connect, by 2N relay group into every 2 relays are correspondingly arranged on each two-way attenuation path；
Control device, it is connected with the relay array, according to the frequency of the tested carrier equipment and default pad value
Control the relay array open/close state and open or close the corresponding two-way attenuation path.
Preferably, the control device includes control main frame and microcontroller；
The control main frame is found according to the frequency of the tested carrier equipment and default pad value inquiry decay value list
Corresponding attenuator sequence number, and the attenuator sequence number is sent to the microcontroller；
The microcontroller according to the attenuator sequence number controls the relay array with two-way decay corresponding to opening
Passage simultaneously closes other two-way attenuation paths.
Preferably, the default pad value is estimated to obtain for the actual environment according to residing for the tested carrier equipment.
Preferably, the default pad value is 20dB, 40dB, 60dB, 80dB and 100dB.
Preferably, the decay value list is the quilt according to same producer's different size or different manufacturers different size
Survey carrier equipment to test to obtain one by one, and be stored in the control main frame.
Preferably, the control main frame is connected by RS485 buses with the microcontroller, and the microcontroller passes through simultaneously
Row controlling bus is connected with the relay array.
Preferably, the relay array include by the control device control synchronization action the first relay array and
Second relay array；
First relay array is connected to the power line with surveying between access interface and attenuator array, and described the
Two relay arrays are connected to the attenuator array and power line is tested between access interface.
Preferably, the inductance value of each attenuator of the attenuator array and capacitance are different.
Preferably, the numerical value of the N is 16.
According to the multi channel selecting attenuation network system provided by the invention based on relay array, controlled by control device
The open/close state of each relay in relay array and two-way attenuation path corresponding to making opens or closes, in this way, to not
When being tested carrier equipment test with the different size of producer or same producer, without attenuator corresponding to artificial change, pass through this
Invention can be achieved to automatically select the decay for switching to and being adapted with the tested carrier equipment currently tested from attenuator array
Device, it is easy to use, automatically switch, testing efficiency is high.
Brief description of the drawings
Fig. 1 is the structural representation of multi channel selecting attenuation network system bright embodiment of this hair based on relay array；
Fig. 2 is the multi channel selecting attenuation network system embodiment repeat circuit array of the invention based on relay array with declining
Subtract connection relationship diagram inside device array；
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Technical scheme is described in detail below with reference to drawings and the specific embodiments, to become apparent from, intuitively
Understand the invention essence of the present invention.
Shown in reference picture 1, the embodiments of the invention provide the multi channel selecting attenuation network system based on relay array, bag
Include power line and be tested access interface (output end) 20, attenuator array 30, relay with survey access interface (input) 10, power line
Device array and control device.
Wherein, power line is connected to carrier equipment (not shown) is surveyed with access interface 10 is surveyed, and end is surveyed to realize to match somebody with somebody
The electrical connection of power line carrier signal, power line are tested access interface 20 and are connected to tested carrier equipment (not shown), use
In the electrical connection for providing tested end power line carrier signal.
Attenuator array 30 is connected to power line with surveying between access interface 10 and the tested access interface 20 of power line, is used for
The attenuation characteristic of power line carrier signal is simulated, realizes the transmitted in both directions attenuation function of attenuation path.The attenuator array 30 is wrapped
Containing N number of attenuator, and each attenuator is separate, different, in power line with survey access interface 10 and power line
N number of independent two-way attenuation path is formed between tested access interface 20, the two-way attenuation path is included via power line with survey
Access interface 10, relay array, attenuator array 30 and power line are tested the positive attenuation path that access interface 20 is formed, with
And it is tested access interface 20, relay array, attenuator array 30 and power line via power line and is formed with access interface 10 is surveyed
Reverse attenuation passage.
Relay array connects with power line with the tested access interface 20 of access interface 10, attenuator array 30 and power line is surveyed
Connect, by 2N relay group into every 2 relays are correspondingly arranged on a two-way attenuation path.Control device and relay
Array connect, made according to the frequency of tested carrier equipment and default pad value control relay array open/close state corresponding to
Two-way attenuation path opens or closes.When corresponding two-way attenuation path is opened, power line is with survey access interface 10 and electric power
Line is tested the power line carrier signal transmitted between access interface 20 can be in the two-way attenuation path according to the default decay
The attenuation of value is decayed.Above-mentioned default pad value is that the actual environment according to residing for tested carrier equipment is estimated to obtain, should
Default pad value can be 20dB, 40dB, 60dB, 80dB and 100dB.
In a preferred embodiment of the invention, control device includes control main frame 50 and microcontroller 60, control master
The attenuator sequence number according to corresponding to being found the frequency of tested carrier equipment and default pad value inquiry decay value list of machine 50, and will
The attenuator sequence number is sent to microcontroller 60；Microcontroller 60 according to attenuator sequence number control relay array with open correspondingly
Two-way attenuation path and close other two-way attenuation paths.
In the present embodiment, control main frame 50 can be connected by RS485 buses with microcontroller 60, and microcontroller 60 can
To be connected by parallel control bus with relay array.
Because the carrier operation frequency band of the tested carrier equipment of each manufacturer is different, 10KHz is substantially distributed in
To between 500KHz, so there is the attenuator for each tested carrier equipment in each manufacturer.In order to meet to different
Tested carrier equipment is tested, and the specification of each attenuator in above-mentioned attenuator array 30 is different, specifically, attenuator
Inductance value, capacitance are different.The inductance value of attenuator is different with capacitance, then the pad value of attenuator is also just different.This hair
In bright preferred embodiment, N 16, that is, 16 different attenuators are configured, corresponding above-mentioned decay value list is referring in particular under
Table template.
As can be seen from the above table, the attenuator array 30 in the present invention covers each in 10KHz to 500KHz frequency ranges
The differential declines value of frequency, the configuration needs to attenuator in the test of low pressure narrow-band power line carrier can be adapted to substantially.
Above-mentioned decay value list is the tested carrier equipment according to same producer's different size or different manufacturers different size
Test obtains one by one, and is stored in control device 50.Specifically, attenuator corresponding to being pre-selected is to each different tested loads
Wave device is tested, and obtains pad value of each differential declines device under different operating frequency, then by the pad value with it is corresponding
Attenuator association after form decay value list, then be stored in control main frame 50.Its frequency of fadings mainly can be 100KHz,
120KHz, 132KHz, 270KHz, 350KHz, 390KHz and 421KHz, you can cover the frequency model of main attenuator on the market
Enclose.
In another preferred embodiment of the invention, relay array includes controlling the of synchronization action by control device
One relay array 40 and the second relay array 41, the first relay array 40 are connected to power line with the survey He of access interface 10
Between attenuator array 30, the second relay array 41 be connected to attenuator array 30 and power line be tested access interface 20 it
Between.First relay array 40 and the second relay array 41 use series system, only when the first relay array 40 and
When being located at corresponding two relays in same two-way attenuation path in two relay arrays 41 while acting, the two-way decay is led to
Road can connect, it can thus be avoided easily caused using single relay array malfunction the problems such as.
Specifically, corresponding to the contact 401 of each relay is connected to shown in reference picture 2, in the first relay array 40
Before attenuator, and the contact 411 of each relay is connected to after corresponding attenuator in the second relay array 41.Right
When some tested carrier equipment is tested, corresponding in the first relay array 40 and the second relay array 41 one after
After the control signal that microcontroller 60 is sent is received, contact 401,411 closes electrical equipment, and the contact 401 of other relays,
411 disconnect, and now, power line is tested between access interface 20 with survey access interface 10 to power line and forms only one path
(path be power line carrier signal transmission two-way attenuation path), the frequency characteristic of the attenuator on the path with
The tested carrier equipment frequency requirement of test is adapted, and power line is logical by this with the power line carrier signal for surveying access interface 10
After attenuator in road, the decay of respective attenuation amount can be carried out, the power line carrier signal after decay is exported to power line quilt
Access interface 20 is surveyed, with the decay of power line carrier signal corresponding to completion.
During specifically chosen two-way attenuation path, control main frame 50 first can according to the frequency of tested carrier equipment and
Default pad value, corresponding attenuator sequence number is found in pad value table, and the attenuator sequence number is sent to microcontroller 60,
Then, control signal is to relay array according to corresponding to being sent the attenuator sequence number for microcontroller 60, with control relay battle array
Corresponding relay in row is opened, and other cut-offs, in this way, can tested carrier equipment and with survey carrier equipment it
Between access corresponding to attenuator.
In a particular application, it is specific as follows using the system progress test process of the present invention：
First, power line is connected to carrier equipment (not shown) is surveyed, with survey carrier equipment with access interface 10 is surveyed
Control device (not shown) is connected to, typically can should be copy controller, concentrator and collector etc. with carrier equipment is surveyed, electric power
Line is tested access interface 20 and is connected to tested carrier equipment (not shown), and the tested carrier equipment can be wireless carrier ammeter
Deng.
Then, according to the working frequency of tested carrier equipment and default pad value, two-way attenuation path corresponding to selection, i.e.,
Complete the option and installment of attenuator.The two-way attenuation path selection of multi channel selecting attenuation network system, the control of controlled device.
Specifically, frequency of the control main frame according to tested carrier equipment, selects corresponding decay row in pad value table, and in the decay
Lookup and the closest pad value of default pad value in row, find corresponding attenuator sequence number.
For example, for the product (tested carrier equipment) of carrier wave Science and Technology Co., Ltd. of Neusoft production, its frequency is
270KHz, row of decaying corresponding to 270KHz are found in value list of decaying, when default pad value is 20dB, control main frame 50 exists
It is 20.32dB to be searched in the row with pad value closest 20dB, its attenuator serial number 7, i.e., is looked into value list of decaying
It is 20.32dB to obtain pad value of the attenuator of serial number 7 in 270KHz, and pad value 20.32dB is from default pad value 20 most
It is close, so No. 7 attenuator access test system of selection.Therefore, now control main frame 50 sends the sequence number 7 of attenuator
To microcontroller 60, microcontroller 60 sends control signal, the relay response control to the relay being connected with No. 7 attenuators
Signal and close, meanwhile, microcontroller 60 control other relays in opened condition, thereby, power line with survey access interface 10
A path is formed between being tested access interface 20 to power line, and (path is the two-way decay of power line carrier signal transmission
Passage), corresponding attenuator can access the path, complete the option and installment of attenuator.
Further, power information acquisition is sent with survey carrier equipment (not shown), is connect via power line with survey
Inbound port 10, relay array, attenuator array 30 and power line are tested access interface 20, are transferred to tested carrier equipment (figure
It is not shown)；Tested carrier equipment responds above-mentioned power information acquisition according to communication protocol, and returns to state and Information Number
According to.The data of return are again that power line is tested access interface 20, relay array, attenuator array 30 via reverse attenuation passage
With power line with access interface 10 is surveyed, it is transferred to survey carrier equipment (not shown).
Finally, control device reads and is compared point with surveying between carrier equipment and tested carrier equipment the data transmitted
Analysis, the test of communications success rate and unification of communication protocol for completing tested carrier equipment are examined；Meanwhile signal analyzer
(not shown) is attempted by power line and is tested access interface 20, captures the power line carrier signal on two-way attenuation path, realizes
The testing performance indexes such as power line carrier signal level, tranmitting frequency skew, receiving sensitivity.
In multi channel selecting attenuation network system of the present invention based on relay array, preset pad value be 20dB, 40dB,
60dB, 80dB and 100dB, each preset pad value and correspond to corresponding test environment, each tested carrier equipment is both needed to above-mentioned
Each default pad value carries out simulation test once, that is, repeats the above steps.
In summary, the multi channel selecting attenuation network system of the invention based on relay array, multiple attenuators are shared, point
Cloth is laid out, centralized Control, is made by the open/close state of each relay in control device control relay array corresponding
Two-way attenuation path opens or closes；When the different size to same producer or different manufacturers is tested carrier equipment test, nothing
Attenuator corresponding to replacing need to be manually selected, broad covered area, configuration is convenient, is easy to expand；It can be achieved from decay by the present invention
The attenuator for switching to and being adapted with the tested carrier equipment currently tested is automatically selected in device array, it is easy to use, cut automatically
Change, testing efficiency is high.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of multi channel selecting attenuation network system based on relay array, including with being connected to access with survey carrier equipment
The power line of power line carrier signal, which is matched somebody with somebody, surveys access interface, and for the power line carrier signal after decay to be exported to tested load
The power line of wave device is tested access interface；Characterized in that, also include：
Attenuator array, the power line is connected to surveying between access interface and the tested access interface of power line, is declined by multiple
Subtract device composition, and each attenuator is tested between access interface with survey access interface and power line in the power line and formed
One independent two-way attenuation path；
Relay array, it is connected with the power line with the tested access interface of access interface, attenuator array and power line is surveyed, by
2N relay group is into every 2 relays are correspondingly arranged on each two-way attenuation path；
Control device, it is connected with the relay array, is controlled according to the frequency of the tested carrier equipment and default pad value
The relay array open/close state and the two-way attenuation path corresponding to making opens or closes.
2. the multi channel selecting attenuation network system according to claim 1 based on relay array, it is characterised in that described
Control device includes control main frame and microcontroller；
The control main frame is found correspondingly according to the frequency of the tested carrier equipment and default pad value inquiry decay value list
Attenuator sequence number, and the attenuator sequence number is sent to the microcontroller；
The microcontroller according to the attenuator sequence number controls the relay array with two-way attenuation path corresponding to opening
And close other two-way attenuation paths.
3. the multi channel selecting attenuation network system according to claim 1 or 2 based on relay array, it is characterised in that
The default pad value is estimated to obtain for the actual environment according to residing for the tested carrier equipment.
4. the multi channel selecting attenuation network system according to claim 3 based on relay array, it is characterised in that described
Default pad value is 20dB, 40dB, 60dB, 80dB and 100dB.
5. the multi channel selecting attenuation network system according to claim 2 based on relay array, it is characterised in that described
Value list of decaying is tested one by one according to the tested carrier equipment of same producer's different size or different manufacturers different size
Obtain, and be stored in the control main frame.
6. the multi channel selecting attenuation network system according to claim 2 based on relay array, it is characterised in that described
Control main frame is connected by RS485 buses with the microcontroller, the microcontroller by parallel control bus with it is described after
Electrical equipment array connects.
7. the multi channel selecting attenuation network system according to claim 1 based on relay array, it is characterised in that described
Relay array includes the first relay array and the second relay array that synchronization action is controlled by the control device；
First relay array is connected to the power line with surveying between access interface and attenuator array, described second after
Electrical equipment array is connected to the attenuator array and power line is tested between access interface.
8. the multi channel selecting attenuation network system according to claim 6 based on relay array, it is characterised in that described
The inductance value and capacitance of each attenuator of attenuator array are different.
9. the multi channel selecting attenuation network system according to claim 8 based on relay array, it is characterised in that described
N numerical value is 16.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410239878.0A CN104038385B (en) | 2014-05-30 | 2014-05-30 | Multi channel selecting attenuation network system based on relay array |
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| CN201410239878.0A CN104038385B (en) | 2014-05-30 | 2014-05-30 | Multi channel selecting attenuation network system based on relay array |
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| CN104038385B true CN104038385B (en) | 2017-11-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105024731B (en) * | 2015-08-26 | 2017-06-16 | 上海斐讯数据通信技术有限公司 | A kind of power line network product testing system |
| CN106357303A (en) * | 2016-09-22 | 2017-01-25 | 国网甘肃省电力公司电力科学研究院 | Power line carrier communication detection system |
| CN108206121B (en) * | 2017-12-29 | 2019-08-23 | 哈尔滨工大测控技术有限公司 | 1 switching system of multiselect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206973A (en) * | 2007-11-08 | 2008-06-25 | 重庆大学 | Bistable microcomputer electric relay |
| CN201985869U (en) * | 2010-12-22 | 2011-09-21 | 中国空间技术研究院 | Radio frequency channel switching device |
| CN202759444U (en) * | 2012-06-25 | 2013-02-27 | 广东电网公司电力科学研究院 | Dual-port node device for low-voltage power line carrier communication routing path simulation test |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8278940B2 (en) * | 2009-09-30 | 2012-10-02 | Tektronix, Inc. | Signal acquisition system having a compensation digital filter |
| CN203883859U (en) * | 2014-05-30 | 2014-10-15 | 国家电网公司 | Multi-gate attenuation network system based on relay array |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206973A (en) * | 2007-11-08 | 2008-06-25 | 重庆大学 | Bistable microcomputer electric relay |
| CN201985869U (en) * | 2010-12-22 | 2011-09-21 | 中国空间技术研究院 | Radio frequency channel switching device |
| CN202759444U (en) * | 2012-06-25 | 2013-02-27 | 广东电网公司电力科学研究院 | Dual-port node device for low-voltage power line carrier communication routing path simulation test |
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