CN104793069A - Data transmission performance self-checking system of active cable - Google Patents
Data transmission performance self-checking system of active cable Download PDFInfo
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- CN104793069A CN104793069A CN201510106171.7A CN201510106171A CN104793069A CN 104793069 A CN104793069 A CN 104793069A CN 201510106171 A CN201510106171 A CN 201510106171A CN 104793069 A CN104793069 A CN 104793069A
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Abstract
The invention discloses a data transmission performance self-checking system of an active cable. The active cable is a double-core transmission cable with a first core and a second core. The first core is used as an up link, and the second core is used as a down link. The data transmission performance self-checking system comprises loop-back circuits, signal transmitting modules, signal receiving modules, microcontrollers and changeover switches. The loop-back circuits are selectively communicated with the first core and the second core; the signal transmitting modules transmit signals to the first core; the signal receiving modules receive signals from the first core, and the signals from the first core are received by the second core via the loop-back circuits; the microcontrollers compare bit error rates of the signals transmitted by the signal transmitting modules and the corresponding signals received by the signal receiving modules and judge the data transmission performance of the active cable according to the bit error rates; the loop-back circuits, the signal transmitting modules, the signal receiving modules, the microcontrollers and the changeover switches are arranged in chips in interface modules at two ends of the active cable. The data transmission performance self-checking system has the advantages that transmission performance tests on the active cable can be simplified by the aid of brand new test technologies, and the test time can be shortened.
Description
Technical field
The present invention relates to a kind of test macro of active type cable data transmission performance.More particularly, the present invention relates to a kind of data transmission performance self-checking system of active type cable.
Background technology
Active type cable includes source power cable and active optical cable.The interface module of concrete two identical functions in active type cable two ends.
Wherein, active cable refers to the cable adding active chip and process signal transmission in passive direct-connected cable.Relative to passive cable, the transmission range of active cable is longer and lower to the requirement of device Host.
Wherein, active optical cable refers in communication process to be needed, by extra power, to convert the electrical signal to light signal, or converts light signal the communications cable of electric signal to, and the optical transceiver at optical cable two ends provides opto-electronic conversion and optical transport function.Large data age, high density, bandwidth applications get more and more, and now passive optical cable or the cable system based on copper cash just seem awkward.The stability transmitted for guarantee and flexibly application, a kind of novel product of user's active demand is used as the prevailing transmission medium of high-performance calculation and data center, and active optical cable product arises at the historic moment under such conditions.Compared to conventional wire cable, active optical cable has the plurality of advantages such as transfer rate is high, transmission range is long, energy consumption is low, easy to use, and communication facilities can be helped to enjoy the huge advantage of optical transport, is the desirable transmission cable in the field such as data center, consumer electronics.
In the production test procedure of active type cable, usually need to use the signal transmission performance of Error Detector to cable to detect.Code error tester forms by sending and receive two parts, the test code generator of transmitting portion produces a known test Serial No., the input end of system under test (SUT) is sent into after coding, export after system under test (SUT) transmission, enter the receiving unit decoding of code error tester and obtain synchronous clock from Received signal strength.The test code generator of receiving unit produces identical with transmitting portion and synchronous Serial No., and the signal received compares, if inconsistent, it is error code, count by the figure place of counter to error code, then record storage, analyze, show test results.
Above-mentioned Error Detector can comprise pseudo-noise code generator and pseudo-random code signal errors checkout equipment.Prior art adopts independent pseudo-random code signal generator and pseudo-random code signal errors checkout equipment.The signal produced by pseudo-random code signal generator accesses pseudo-random code signal errors checkout equipment after active type cable transmission, by reading the condition adjudgement testing result of pseudo-random code detecting device.As shown in Figure 1, test macro comprises pseudo-random code signal generator, pseudo-random code detecting device, RF cable, test board and tested active type cable.As seen from Figure 1, there is following drawback in this scheme:
One, need complete set testing apparatus, equipment cost has high input;
Two, active type cable possesses full-duplex communication standard, and prior art is tested at every turn and only can be tested one-way transmission performance, and completing an active type cable test needs to carry out twice test.
Summary of the invention
An object of the present invention is to solve at least the problems referred to above and/or defect, and the advantage will illustrated at least is below provided.
A further object of the invention is to provide a kind of data transmission performance self-checking system of active type cable, it is by signalization transmitter module, signal receiving module and circuit winding in the interface module of active type cable two ends, achieve the effect that once test can detect cable oneself data transmission performance, and no longer need external testing apparatus, reduce equipment investment cost.
In order to realize, according to these objects of the present invention and other advantage, providing following technical scheme:
A data transmission performance self-checking system for active type cable, described active type cable is the twin-core transmission cable with the first core as up-link and the second core as downlink, and it comprises:
Winding circuit, it is the first core described in UNICOM and the second core optionally;
Signal emission module, it transmits to described first core;
Signal receiving module, it receives the signal from described first core that described second core is arrived by described winding line receiver;
Microcontroller, the bit error rate between the signal that its more described signal emission module is launched and the corresponding signal that described signal receiving module receives, to judge the data transmission performance of described active type cable accordingly; And
Change-over switch, it switches the UNICOM state of described winding circuit between described first core and the second core, and switches described signal emission module and described signal receiving module and whether be in transmitting or acknowledge(ment) signal state;
Wherein, described winding circuit, signal emission module, signal receiving module, microcontroller and change-over switch are all arranged in the chip in the interface module at described active type cable two ends.
Preferably, described signal emission module is pseudo-random code transmitter, and it launches pseudo-random code.
Preferably, described change-over switch is utilize a ground pin in chip to realize, wherein, when ground pin is in ground connection low level state, change-over switch switches described winding circuit not UNICOM between described first core and the second core, and switches described signal emission module and described signal receiving module is not in transmitting or receiving state signal; When ground pin is in high level state, change-over switch switches described winding circuit and makes described first core and the second core UNICOM, and switches described signal emission module and described signal receiving module and be in transmitting or receiving state signal.
Preferably, the data transmission performance self-checking system of described active type cable also comprises: two external test boards, and it is connected to the interface module at described active type cable two ends respectively,
Described two external test boards arrange ground pin described in the interface module that is attached thereto respectively and are in high level state.
Preferably, described two external test boards are provided with LED light, are carried out the instruction of error code status by the LED light of one of them test board based on the described bit error rate.
Preferably, the data transmission performance self-checking system of described active type cable, also comprises: be arranged on the LED light in interface module, and when the described bit error rate exceedes threshold value, described LED light indicates this active type cable not pass through Performance Detection.
Preferably, the data transmission performance self-checking system of described active type cable, also comprises: test board, and it is arranged in the interface module at described active type cable two ends, and described test board arranges described ground pin and is in high level state.
Preferably, described LED light is arranged on described test board.
Preferably, described active type cable includes source power cable and active optical cable.
The data transmission performance self-checking system of active type cable of the present invention at least comprises following beneficial effect:
The testing apparatus of one, needs is simple; Namely pseudo-noise code generator, pseudo-random code detecting device and RF cable that tradition is external is eliminated;
Two, testing procedure is simple; The operation to pseudo-noise code generator and pseudo-random code detecting device is eliminated, only by the mark of the LED display on test board as testing result in test process;
Three, the test duration is short; Once test effectively can detect the Capability transmission of two of a full duplex path.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the system schematic that the data transmission performance of prior art to active type cable detects;
Fig. 2 is the composition frame chart of active type cable data transmission performance self-checking system of the present invention wherein a kind of embodiment;
Fig. 3 is the built-in function block diagram of active type cable two ends of the present invention interface module wherein a kind of embodiment;
Fig. 4 is the workflow diagram of active type cable two ends of the present invention interface module wherein a kind of embodiment;
Fig. 5 is the workflow schematic diagram of test board of the present invention wherein a kind of embodiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to instructions word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other element one or more do not got rid of in " comprising " and " comprising " term or the existence of its combination or interpolation.
With reference to Fig. 2-3, the invention provides a kind of data transmission performance self-checking system of active type cable, described active type cable is the twin-core transmission cable with the first core as up-link and the second core as downlink, and it comprises:
Winding circuit, it is the first core described in UNICOM and the second core optionally;
Signal emission module, it transmits to described first core;
Signal receiving module, it receives the signal from described first core that described second core is arrived by described winding line receiver;
Microcontroller, the bit error rate between the signal that its more described signal emission module is launched and the corresponding signal that described signal receiving module receives, to judge the data transmission performance of described active type cable accordingly; And
Change-over switch, it switches the UNICOM state of described winding circuit between described first core and the second core, and switches described signal emission module and described signal receiving module and whether be in transmitting or receiving state signal;
Wherein, described winding circuit, signal emission module, signal receiving module, microcontroller and change-over switch are all arranged in the chip in the interface module at described active type cable two ends.
Here, in such scheme of the present invention, only by signalization transmitter module, signal receiving module and circuit winding in the interface module of active type cable two ends, just achieve the effect of once testing and just can detect active type cable oneself data transmission performance, and no longer need external testing apparatus, reduce equipment investment cost.In other words, the present invention is between two inner cores of active type cable, described first core is utilized to send data, second core forwards the data that the first core sends, and received by signal receiving module, recycling microcontroller compares, and can record this active type cable and whether have good data transmission performance.Adopt in such a way, be once total reportedly defeated performance test results, testing efficiency is not only high, and does not substantially need other any extraneous testing apparatus supports.Here, with reference to the inner composition frame chart of interface module that Fig. 3 provides, wherein, winding circuit is directive, the inner core side that its inner core side directional signal transmitter module (pseudo-noise code generator) connected by signal receiving module in interface module (pseudo-random code receiver) connects, and be optionally communicated with, as can be seen here, the present invention is transmitted to the first core by the signal emission module in the interface module of active type cable one end, this signal through in other end interface module by the winding circuit transfer of the first core and the second core UNICOM after be back to the second core and transmit, the signal receiving module be launched after transmission in the interface module of signal end received, and utilize microcontroller wherein to compare, just show whether signal has error code.
In technique scheme, preferably, described signal emission module is pseudo-random code transmitter, and it launches pseudo-random code.Above-mentioned pseudo-random code is back to signal receiving module (also can be described as pseudo-random code receiver) by winding circuit, by comparing the two difference, microcontroller can show whether this tested active type cable exists error code, can record the data transmission performance of this tested active type cable.
In technique scheme, preferably, described change-over switch is utilize a ground pin in chip to realize, wherein, when ground pin is in ground connection low level state, change-over switch switches described winding circuit not UNICOM between described first core and the second core, and switches described signal emission module and described signal receiving module is not in transmitting or receiving state signal; When ground pin is in high level state, change-over switch switches described winding circuit and makes described first core and the second core UNICOM, and switches described signal emission module and described signal receiving module and be in transmitting or receiving state signal.Here, described change-over switch utilizes a ground pin of chip to realize, it is the mode of operation change-over switch as active type cable, in other words: when this active type cable normally works (being connected to communication load), its ground pin is normal ground connection low level state, and winding circuit, signal emission module and signal receiving module wherein cut little ice; And when this active type cable will carry out performance test, its ground pin will be placed in high level state, change-over switch can make winding circuit, signal emission module and signal receiving module optionally be in starting state, to realize data transmission performance testing under the effect of microcontroller.Specifically, the present invention can switch to make cable under normal mode of operation and test pattern, and under guaranteeing can not to work in test pattern when normal use, then utilize in cable interface module in multiple ground pin one as mode of operation change-over switch, when cable interface inside modules detects that this pin is configured to normal mode of operation when being low level, when cable interface inside modules detects that this pin is configured to test pattern when being high level.When normal use, this pin is for ground connection low level state, cable interface module work is in normal mode of operation, and when tested, this pin is then set to high level state by test board, and wiring module works in test pattern.
For realizing the setting to change-over switch, the present invention preferably, the data transmission performance self-checking system of described active type cable also comprises: two external test boards, see Fig. 2, it is connected to interface module A, the B at described active type cable two ends respectively, and described two external test boards arrange ground pin described in the interface module that is attached thereto respectively and are in high level state.Specifically, when needs are tested active type cable, interface module by active type cable two ends is inserted into two test boards, the ground pin of its change-over switch will be arranged to high level state by test board, and provide normal working voltage for the interface module of active type cable, start test procedure to make it.Wherein, test board refers to that can accept cable interface module inserts and the minimum unit providing relevant work voltage.
Conveniently tester judges active type cable transmission performance final detection result fast, the present invention preferably, described two external test boards are provided with LED light, see Fig. 2, and carry out state display by the LED light of one of them test board based on the described bit error rate.Namely this LED light is as bit error signal pilot lamp, and the signal level state of some pins of its instruction interface module external interface pin, the level signal of this pin is subject to the control of the inner Error detection function of interface module.Specifically, pass through foregoing description, and with reference to the interface module built-in function block diagram shown in Fig. 3, in the interface module of active type cable two ends of the present invention, only have one end interface module carry out signal launch and Signal reception to carry out Error detection, one end interface module then carries out the transfer of data in addition, and the LED light of carrying out error code status display is here then the test board pilot lamp being connected to Error detection end interface module.In example of the present invention, LED light adopts green light, and green light goes out and indicates that error code testing does not pass through, and green light indicates to be passed through without error code testing.
Next, with reference to Fig. 4-5, the principle of work of active type cable data transmission performance self-checking system of the present invention is illustrated:
Wherein, Fig. 4 is active type cable interface module workflow diagram.
By flow diagram, after cable interface module powers on, first detecting pattern controls whether pin level (namely as the ground pin of change-over switch) is high level state, if height then enters test pattern, if low, enters normal mode of operation.First pseudo-random code receiver (being in receiving state signal) is started after entering test pattern, and detect pseudo-random code receiver and whether have signal: if there is signal, represents that the other end of cable interface module has worked in test pattern and opened pseudo-noise code generator (having carried out signal transmitting) and pseudo-random code receiver (the returning reception of waiting signal), now open circuit winding function and close pseudo-random code receiver; If no signal, represent that the other end of wiring module does not also work (namely not transmitting), now open pseudo-noise code generator again, and close cable winding function, again detect number of bit errors at set intervals later.Interface module is eventually through an external interface pin output state indicator signal, and test board determines the light on and off state of LED light by the level height detecting this condition indicative signal.With reference to Fig. 5, when detecting that condition indicative signal is high, extinguish LED light; When detecting that condition indicative signal is low, light LED light.
For the judgement of active type cable data transmission performance, then on the test board connected according to the interface module of Error detection end, LED light judges, specifically:
During test cable, insert one end A of cable to test board A, now this test board A pilot lamp goes out, then the other end B inserting cable is to another test board B, and now test board B pilot lamp is bright.When the LED light of test board B is bright, whether the LED light condition adjudgement cable starting observation test plate A good, state and judged result as follows:
One, pilot lamp Chang Liang: transmission is without error code, and this cable transmission data performance is good.
Two, pilot lamp flicker: transmit intermittent error code, this cable transmission data performance is abnormal slight.
Three, pilot lamp extinguishes: transmission keeps error code always, and this cable two tunnel data performances are abnormal serious.
Further, the present invention gives another more excellent embodiment, is built in the technical scheme of cable interface module by test board:
Specifically, the data transmission performance self-checking system of described active type cable, also comprises: be arranged on the LED light in interface module, and when the described bit error rate exceedes threshold value, described LED light indicates this active type cable not pass through Performance Detection.Namely when there is error code, LED light just instruction active type cable does not pass through performance test, now can adopt when red to carry out and point out (still only judge according to the light on and off situation of the LED light in the interface module of one end, and the other end being only as data relay).
Preferably, the data transmission performance self-checking system of described active type cable, also comprises: test board, and it is arranged in the interface module at described active type cable two ends, and described test board arranges described ground pin and is in high level state.Here the same, still switched mode of operation by test board, when interface module normally works, its ground pin is low level state, if people need to carry out Performance Detection to active type cable, has come by starting test board.It is further preferred that described LED light is arranged on described test board, principle is the same.
In the present invention, described active type cable includes source power cable and active optical cable.Namely be both applicable to detecting active cable, and be applicable to again detecting active optical cable.
Pseudo-noise code generator, pseudo-random code detecting device, circuit winding and microcontroller that New Active cable self-checking system provided by the present invention utilizes active type cable inside to carry, coordinate unique detection implementation method, make the interface module at active type cable two ends can one or several functions in self-adapting start pseudo-noise code generator, pseudo-random code detecting device and circuit winding, and can detect and indicate error code status.It is low for testing apparatus requirement, test operation is easy, test result observation is easy, testing efficiency is high.
Here the number of devices illustrated and treatment scale are used to simplify explanation of the present invention.The application of active type cable data transmission performance self-checking system of the present invention, modifications and variations be will be readily apparent to persons skilled in the art.
Although embodiment of the present invention is open as above, it is not restricted to listed in instructions and embodiment utilization.It can be applied to various applicable the field of the invention completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (9)
1. a data transmission performance self-checking system for active type cable, described active type cable is the twin-core transmission cable with the first core as up-link and the second core as downlink, it is characterized in that, comprising:
Winding circuit, it is the first core described in UNICOM and the second core optionally;
Signal emission module, it transmits to described first core;
Signal receiving module, it receives the signal from described first core that described second core is arrived by described winding line receiver;
Microcontroller, the bit error rate between the signal that its more described signal emission module is launched and the corresponding signal that described signal receiving module receives, to judge the data transmission performance of described active type cable accordingly; And
Change-over switch, it switches the UNICOM state of described winding circuit between described first core and the second core, and switches described signal emission module and described signal receiving module and whether be in transmitting or receiving state signal;
Wherein, described winding circuit, signal emission module, signal receiving module, microcontroller and change-over switch are all arranged in the chip in the interface module at described active type cable two ends.
2. the data transmission performance self-checking system of active type cable as claimed in claim 1, it is characterized in that, described signal emission module is pseudo-random code transmitter, and it launches pseudo-random code.
3. the data transmission performance self-checking system of active type cable as claimed in claim 2, it is characterized in that, described change-over switch is utilize a ground pin in chip to realize, wherein, when ground pin is in ground connection low level state, change-over switch switches described winding circuit not UNICOM between described first core and the second core, and switches described signal emission module and described signal receiving module is not in transmitting or receiving state signal; When ground pin is in high level state, change-over switch switches described winding circuit and makes described first core and the second core UNICOM, and switches described signal emission module and described signal receiving module and be in transmitting or receiving state signal.
4. the data transmission performance self-checking system of active type cable as claimed in claim 3, is characterized in that, also comprise: two external test boards, and it is connected to the interface module at described active type cable two ends respectively,
Described two external test boards arrange ground pin described in the interface module that is attached thereto respectively and are in high level state.
5. the data transmission performance self-checking system of active type cable as claimed in claim 4, it is characterized in that, described two external test boards are provided with LED light, are carried out the instruction of error code status by the LED light of one of them test board based on the described bit error rate.
6. the data transmission performance self-checking system of active type cable as claimed in claim 3, it is characterized in that, also comprise: be arranged on the LED light in interface module, when the described bit error rate exceedes threshold value, described LED light indicates this active type cable not pass through Performance Detection.
7. the data transmission performance self-checking system of active type cable as claimed in claim 6, it is characterized in that, also comprise: test board, it is arranged in the interface module at described active type cable two ends, and described test board arranges described ground pin and is in high level state.
8. the data transmission performance self-checking system of active type cable as claimed in claim 7, it is characterized in that, described LED light is arranged on described test board.
9. the data transmission performance self-checking system of the active type cable as described in any one of claim 1-8, is characterized in that, described active type cable includes source power cable and active optical cable.
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| CN107064662A (en) * | 2015-11-16 | 2017-08-18 | 联发科技股份有限公司 | The test device and its method of testing of connecting interface |
| CN106997015A (en) * | 2017-05-24 | 2017-08-01 | 惠州汇聚电线制品有限公司 | A kind of communication cable performance test methods and test equipment |
| CN108828354A (en) * | 2018-06-01 | 2018-11-16 | 曙光信息产业(北京)有限公司 | A kind of test device of cable |
| CN108828354B (en) * | 2018-06-01 | 2021-06-04 | 中科曙光信息产业成都有限公司 | Testing device for cable |
| CN109406931A (en) * | 2018-11-01 | 2019-03-01 | 上海开通数控有限公司 | Servo drive system cable detecting device |
| CN110474680A (en) * | 2019-07-31 | 2019-11-19 | 武汉联胜光电技术有限公司 | A kind of active optical cable Air conduct measurement control card and detection method |
| CN110474680B (en) * | 2019-07-31 | 2024-06-07 | 武汉联胜光电技术有限公司 | Active optical cable channel detection control card and detection method |
| WO2021115128A1 (en) * | 2019-12-13 | 2021-06-17 | 长飞光纤光缆股份有限公司 | Aoc optical module connection inspection method and device |
| CN111948512A (en) * | 2020-06-19 | 2020-11-17 | 浪潮(北京)电子信息产业有限公司 | Cable signal integrity testing method and device and storage medium |
| CN113742124A (en) * | 2021-08-25 | 2021-12-03 | 许继集团有限公司 | Intelligent IO (input/output) outlet self-checking method and system based on CAN (controller area network) bus |
| CN113742124B (en) * | 2021-08-25 | 2024-02-13 | 河南源网荷储电气研究院有限公司 | Intelligent IO (input/output) self-checking method and system based on CAN (controller area network) bus |
| CN113890771A (en) * | 2021-11-30 | 2022-01-04 | 长芯盛（武汉）科技有限公司 | Device and method for reducing power consumption of active cable |
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