CN102143279A - Detecting device, method and system - Google Patents
Detecting device, method and system Download PDFInfo
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- CN102143279A CN102143279A CN2010106144060A CN201010614406A CN102143279A CN 102143279 A CN102143279 A CN 102143279A CN 2010106144060 A CN2010106144060 A CN 2010106144060A CN 201010614406 A CN201010614406 A CN 201010614406A CN 102143279 A CN102143279 A CN 102143279A
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Abstract
The invention discloses a detecting device, method and system, which belong to the technical field of communication. The device comprises a control module, a sampling resistor network and a controllable short-circuit loop, wherein one end of the controllable short-circuit loop is connected with a feedback loop of the sampling resistor network while the other end thereof is connected with the control module; one end of the sampling resistor network is connected with the control module while the other end thereof is connected with a test load; the sampling resistor network is used for sampling a test signal emitted from the control module and sending the sampled signal back to the control module; the controllable short-circuit loop is used for shorting out the feedback loop in the sampling resistor network; and the control module is used for shorting out the feedback loop in the sampling resistor network through controlling the controllable short-circuit loop so as to test the resistance-capacitance of the test load. The embodiment of the invention effectively reduces the interference error among lines in the sampling resistor network through controlling the working state of the controllable short-circuit loop so as to obtain more accurate testing result.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of checkout equipment, method and system.
Background technology
Along with the continuous expansion of broadband network, operator requires to develop towards simple, maintainable direction good, that cost is low to the O﹠M of broadband network.Wherein, concerning Virtual network operator, how can be simply and effectively the telephone line of user side be detected, (this parameter can be direct voltage, insulation resistance, capacitance-resistance parameter etc. to obtain its parameter that needs, for the telecommunications attendant provides basic line upkeep data), be to need the eager problem that solves.
Operator adopts MELT (Metallic Line Test) testing equipment that the broadband network parameter of user side is tested in the prior art.This testing equipment is arranged at the operator place, and operator can be by the simple and effective parameter that needs of measuring of this equipment.As shown in Figure 1, at CO (Central Office, telephone exchange) side is provided with the MELT testing equipment, wherein, MELT substantial periphery circuit, this circuit comprises MELT module and sampling resistor network, and the MELT module connects test load by the sampling resistor network, and wherein test load comprises subscribers feeder and ustomer premises access equipment.Wherein, the concrete grammar that carries out parameter testing by this testing equipment is: the different parameters that the MELT module is tested as required sends a low-frequency high-voltage test signal, this low-frequency high-voltage test signal is sent to test load by cabling 2,3 and through sampling resistor, simultaneously, this low-frequency high- voltage signal lead 1,4 and send the MELT module back to by the sampling resistor network.The MELT module is carried out calculation of parameter according to the amplitude and the phase information of the signal that receives, and obtains the capacitance-resistance value of test load, the capacitance-resistance value of operator by obtaining, the O﹠M situation of judgement test load.
After prior art is analyzed, the inventor finds that prior art has following shortcoming at least: existing MELT checkout equipment is the capacitance-resistance value between unified test subscriber's line, wherein subscribers feeder claims the AB line again, it is the name of 2 lines of twisted pair telephone, therefore if obtain A line capacitance-resistance value over the ground respectively, or B line capacitance-resistance value over the ground, need in software, carry out complicated de-embedding to test result, but in the MELT peripheral circuit as shown in Figure 1, the internetwork line holding wire of sampling resistor close together, coupling capacitance can influence the line test result between line, especially can cause the capacitance-resistance test of line characteristic inaccurate, in the de-embedding process, repeatedly use coarse test result can cause serious error accumulation, cause the test result precision that finally obtains not high.
Summary of the invention
For the measuring accuracy embodiment of the invention that improves broadband network provides a kind of checkout equipment, method and system.Described technical scheme is as follows:
On the one hand, provide a kind of checkout equipment, described equipment comprises: control module, sampling resistor network, controlled short-circuit loop;
One end of described controlled short-circuit loop links to each other with the feedback loop of described sampling resistor network, and the other end links to each other with described control module, and described sampling resistor network one end connects described control module, and the other end links to each other with test load;
Described control module is used for making the feedback loop of described sampling resistor network be in short-circuit condition by controlling described controlled short-circuit loop, tests the capacitance-resistance value of described test load;
The described sampling resistor network test signal that described control module is sent that is used to sample, and the back signal of will sampling is sent described control module back to;
Described controlled short-circuit loop is used for making the feedback loop of described sampling resistor network to be in short-circuit condition.
On the other hand, provide a kind of detection method, described method comprises:
Control any one group of controlled short-circuit loop and be in conducting state;
Send the low-frequency high-voltage test signal and be sent to test load by sampling network;
Receive the feedback signal that described test load is sent back to by described sampling resistor network;
Calculate the capacitance-resistance value of described test load according to described feedback signal.
On the other hand, also provide a kind of detection system, described system comprises: checkout equipment, test load;
Wherein, described checkout equipment comprises: control module, sampling resistor network, controlled short-circuit loop;
One end of described controlled short-circuit loop links to each other with the feedback loop of described sampling resistor network, and the other end links to each other with described control module, and described sampling resistor network one end connects described control module, and the other end links to each other with described test load;
The described sampling resistor network test signal that described control module is sent that is used to sample, and the back signal of will sampling is sent described control module back to;
Described controlled short-circuit loop is used for making the feedback loop of described sampling resistor network to be in short-circuit condition;
Described control module is used for making the feedback loop of described sampling resistor network be in short-circuit condition by controlling described controlled short-circuit loop, tests the capacitance-resistance value of described test load.
The beneficial effect of the technical scheme that the embodiment of the invention provides is: by controlling the operating state of controlled short-circuit loop, reduce the mushing error between sampling resistor network center line effectively, to obtain accurate more test result.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of checkout equipment in the prior art;
Fig. 2 is the structural representation of a kind of checkout equipment of providing of the embodiment of the invention 1;
Fig. 3 is the circuit diagram of a kind of checkout equipment of providing of the embodiment of the invention 1;
Fig. 4 is the flow chart of a kind of detection method of providing of the embodiment of the invention 2;
Fig. 5 is the structural representation of a kind of detection system of providing of the embodiment of the invention 3.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Participate in Fig. 2, present embodiment provides a kind of checkout equipment, on the basis of existing checkout equipment, increases controlled short-circuit loop, comprising: control module 101, sampling resistor network 102, controlled short-circuit loop 103;
One end of controlled short-circuit loop 103 links to each other with the feedback loop of sampling resistor network 102, and the other end links to each other with control module 101, sampling resistor network 102 1 end link control modules 101, and the other end links to each other with test load;
Control module 101 is used for making the feedback loop of sampling resistor network 102 be in short-circuit condition by controlling controlled short-circuit loop, the capacitance-resistance value of test test load;
Sampling resistor network 102 is used for the test signal that the controlling of sampling module is sent, and the back signal of will sampling is sent control module back to;
Controlled short-circuit loop 103 is used for making the feedback loop of sampling resistor network 102 to be in short-circuit condition.
In the present embodiment, controlled short-circuit loop all in parallel on each the group feedback loop in sampling resistor network 102, an end of controlled short-circuit loop connects the feedback loop of sampling resistor network, other end link control module.
Further, in the present embodiment, controlled short-circuit loop in parallel on any one group of feedback loop in sampling resistor network 102, an end of controlled short-circuit loop connects the feedback loop of sampling resistor network, other end link control module.
In the present embodiment, control module comprises gate-controlled switch, and gate-controlled switch one end connects controlled short-circuit loop, and control module makes controlled short-circuit loop be in conducting state by the closure of control gate-controlled switch.
Equipment in the present embodiment is applied to the broadband line test, by the voltage cable to CPE (Customer Premise Equipment, user side equipment) side, resistance, line conditions is judged in tests such as electric capacity, for the telecommunications attendant provides basic line upkeep data.For example, when certain network user's application is carried out broadband access network by home phone line, after Virtual network operator is received user's application, needs detect this user's telephone line earlier, obtain some parameters on this circuit, judge for it whether this circuit can satisfy the O﹠M requirement of broadband network, if obtain the requirement that test result satisfies operator, then also give this user installation broadband network, after the user opens broadband network, operator also can pass through the checkout equipment that present embodiment provides frequently, detect some basic parameters of user side broadband line, for the telecommunications attendant provides basic line upkeep data, make the attendant grasp the operation situation of circuit.
Referring to Fig. 3, the circuit of the checkout equipment that provides for present embodiment comprises: Melt module 10 (control module), sampling resistor network 18, short- circuit loop 16,17, controlled short-circuit end 13,15,, gate-controlled switch 14,19.Wherein, Melt module 10 sends signal end and is connected to sampling resistor network 18 by cabling 20 and 24, sampling resistor network 18 is connected to load equipment 30 by cabling 31, wherein, load equipment 30 is CPE, 22 and 26 receive the signal that feeds back, sampling resistor network 18 also connects back the receiving terminal of Melt module 10 by sampling resistor network cabling (22 or 26), 31 is XDSL (Digital Subscribe Line, digital subscriber line) cable, be generally category 5 twisted pair, the signal on the circuit is connected to the controlled short-circuit end 13 and 15 of Melt module simultaneously through short- circuit loop 16 and 17, and its center line 31 and load equipment 30 are test load.Further, by Melt module 10 control corresponding software Closing Switch 14 or 19, switch 14 and 19 is to finish short circuit control by short circuit loop 16 and 17.Gate-controlled switch 14 and 19 places chip internal.On behalf of MELT module and DSL business module, 45 annexation is directly arranged.Short-circuit loop, controlled short-circuit end, gate-controlled switch are formed controlled short-circuit loop.
The beneficial effect of the technical scheme that the embodiment of the invention provides is: by controlling the operating state of controlled short-circuit loop, parameter testing between the AB line can fully be separated, reduce the mushing error between line effectively, and by the short-circuit calibration value that prestores, test value is carried out verification, thereby obtain accurate more test result.
Referring to Fig. 4, present embodiment provides a kind of detection method, comprising:
Step 201: send the low-frequency high-voltage test signal and be sent to test load by the sampling resistor network;
Step 202: the feedback signal that the acceptance test load is sent back to by the sampling resistor network;
Step 203: the capacitance-resistance value that calculates test load according to feedback signal.
Wherein, transmission low-frequency high-voltage test signal is sent to before the described test load by the sampling resistor network, also comprises:
Obtain the short-circuit calibration value that prestores.
Correspondingly, in the present embodiment, calculate the capacitance-resistance value of test load, also comprise afterwards according to feedback signal:
Judge whether the capacitance-resistance value that obtains satisfies pre-conditioned;
If satisfy, show that then there is not error in this test, with the capacitance-resistance value that obtains as described check test value; If do not satisfy, show that then there is error in this test, the capacitance-resistance value that obtains and the short-circuit calibration value that prestores are carried out read group total, obtain the check test value.
In the present embodiment, being convenient to understand the present invention in order to make those skilled in the art, is that example describes to utilize testing circuit shown in Figure 3 to carry out the capacitance-resistance test.
Wherein, before carrying out the capacitance-resistance test, preferably, by short circuit condition is set, preserve one group of capacitance-resistance check value in advance, the short-circuit calibration value promptly prestores.Concrete, control gate-controlled switch closure to ground, is tested the line short circuit of Melt module 10 to the loop of this moment, and the test value that obtains is the short-circuit calibration value that prestores.In the present embodiment, in order to ensure the accuracy of data, can all obtain the short-circuit calibration value that once prestores before each parameter testing, can obtain the short-circuit calibration value that once prestores in the default time yet, present embodiment is not done concrete qualification at this.
In the present embodiment, controlled short-circuit loop has three kinds of optional mode of operations, can guarantee that measurement circuit capacitance-resistance parameter is more accurate, and pattern disconnects at one: 19, and 14 closures are tested the A line separately; Pattern disconnects at two: 14,19 closures, test b line separately; Pattern three is 14 and 19 disconnections simultaneously, parameter between test A, B line and AB line.In the present embodiment, the demand different according to client by the operating state of control short-circuit loop, guarantees the independence of single line test, thereby improves measuring accuracy.As, when over the ground parameter of needs tests A, the controlled short-circuit loop at control B line place is in short-circuit condition, when Melt module 10 begins to test, send a low-frequency high-voltage test signal by cabling 22,24 also are sent to test load 30 through sampling resistor, but because the feedback loop at B line place is in short-circuit condition at this moment, so 10 of Melt modules receive test load at A line place by 26 signals that feed back, 10 pairs of signals that feed back of Melt module calculate, obtain A line parameter over the ground, so just reduced 22,20 pairs 24, disturbed between 26 line.Equally when needing over the ground parameter of test b, the controlled short-circuit loop at control A line place is in short-circuit condition, when Melt module 10 begins to test, send a low-frequency high-voltage test signal by cabling 22,24 also are sent to test load 30 through sampling resistor, but because the feedback loop at A line place is in short-circuit condition at this moment, so 10 of Melt modules are received the signal that feeds back by 20,10 pairs of signals that feed back of Melt module calculate, obtain B line parameter over the ground, so just reduced 24,26 pairs 22, disturbed between 20 line.
After obtaining test parameter, Melt module 10 is according to behind the low-frequency high-voltage signal that receives, obtain the amplitude and the phase place of this signal, concrete amplitude and phase information according to the low-frequency high-voltage signal are carried out calculation of parameter, and test obtains one group of capacitance-resistance test value A of test load.Wherein, obtain after the test value A, A assesses to test value, and it is pre-conditioned to judge whether the capacitance-resistance value A that obtains satisfies, if satisfy, then this test value A is directly exported as the calibration testing value; If do not satisfy,, obtain calibration testing value C in that the test value A and the short-circuit calibration value that prestores are carried out read group total.After obtaining calibration testing value C, will calibrate test value C output.Wherein, preset condition is to show that there be the pre-conditioned of error in test value, judges by formula (1):
2pi*freq*Ctest*Rtest＜D formula (1)
Wherein, Pi is a circumference ratio, Freq: be the frequency test signal that the MELT module sends, Ctest: be the capacitance among the capacitance-resistance test value A, Rtest: be the resistance value among the capacitance-resistance test value A, D: be a constant that can define voluntarily, this present embodiment is set to 0.1.If wherein the value that the resistance value in the capacitance-resistance value that obtains and capacitance are obtained behind the substitution formula (1) respectively is less than D (0.1), then this capacitance-resistance value satisfies pre-conditioned, this test value of surface does not have error, if the value that the resistance value in the capacitance-resistance value that obtains and capacitance are obtained behind the substitution formula (1) respectively is greater than D, then this capacitance-resistance value does not satisfy pre-conditionedly, shows that there is error in this test.
In the present embodiment, the testing circuit in the Application Example 1 is tested parameter values such as the voltage cable, resistance, electric capacity of cpe side in the broadband line network, for the telecommunications attendant provides basic line upkeep data.
The beneficial effect of the technical scheme that the embodiment of the invention provides is: by controlling the operating state of controlled short-circuit loop, reduce the mushing error between sampling resistor network center line effectively, and, test value is carried out verification, thereby obtain accurate more test result by the short-circuit calibration value that prestores.
Referring to Fig. 5, the embodiment of the invention provides a kind of detection system, and the detection system in the present embodiment is in the wireline inspection in the broadband network, comprising: checkout equipment 301 and test load 302.
Wherein, checkout equipment 302 comprises: control module, sampling resistor network, controlled short-circuit loop;
One end of controlled short-circuit loop links to each other with the feedback loop of sampling resistor network, and the other end links to each other with control module, sampling resistor network one end link control module, and the other end links to each other with test load 302;
The sampling resistor network is used for the test signal that the controlling of sampling module is sent, and the back signal of will sampling is sent control module back to;
Controlled short-circuit loop is used for making the feedback loop of sampling resistor network to be in short-circuit condition;
Control module is used for making the feedback loop of sampling resistor network be in short-circuit condition by controlling controlled short-circuit loop, the capacitance-resistance value of test test load 302.
In the present embodiment, controlled short-circuit loop all in parallel on each the group feedback loop in the sampling resistor network, an end of controlled short-circuit loop connects the feedback loop of sampling resistor network, other end link control module.
Further, in the present embodiment, controlled short-circuit loop in parallel on any one group of feedback loop in the sampling resistor network, an end of controlled short-circuit loop connects the feedback loop of sampling resistor network, other end link control module.
Preferably, in the present embodiment, control module comprises gate-controlled switch, and gate-controlled switch one end connects controlled short-circuit loop, and control module makes controlled short-circuit loop be in conducting state by the closure of control gate-controlled switch.
The beneficial effect of the technical scheme that the embodiment of the invention provides is: by controlling the operating state of controlled short-circuit loop, reduce the mushing error between sampling resistor network center line effectively, and, test value is carried out verification, thereby obtain accurate more test result by the short-circuit calibration value that prestores.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a checkout equipment is characterized in that, described equipment comprises: control module, sampling resistor network, controlled short-circuit loop;
One end of described controlled short-circuit loop links to each other with the feedback loop of described sampling resistor network, and the other end links to each other with described control module, and described sampling resistor network one end connects described control module, and the other end links to each other with test load;
The described sampling resistor network test signal that described control module is sent that is used to sample, and the back signal of will sampling is sent described control module back to;
Described controlled short-circuit loop is used for making the feedback loop of described sampling resistor network to be in short-circuit condition;
Described control module is used for making the feedback loop of described sampling resistor network be in short-circuit condition by controlling described controlled short-circuit loop, tests the capacitance-resistance value of described test load.
2. equipment according to claim 1, it is characterized in that, controlled short-circuit loop all in parallel on each group feedback loop in described sampling resistor network, an end of described controlled short-circuit loop connects the feedback loop of described sampling resistor network, and the other end connects described control module.
3. equipment according to claim 1, it is characterized in that, controlled short-circuit loop in parallel on any one group of feedback loop in described sampling resistor network, an end of described controlled short-circuit loop connects the feedback loop of described sampling resistor network, and the other end connects described control module.
4. checkout equipment according to claim 1, it is characterized in that, described control module comprises gate-controlled switch, and described gate-controlled switch one end connects described controlled short-circuit loop, and described control module makes described controlled short-circuit loop be in conducting state by the closure of controlling described gate-controlled switch.
5. a detection method is characterized in that, described method comprises:
Control any one group of controlled short-circuit loop and be in conducting state;
Send the low-frequency high-voltage test signal and be sent to test load by sampling network;
Receive the feedback signal that described test load is sent back to by described sampling resistor network;
Calculate the capacitance-resistance value of described test load according to described feedback signal.
6. method according to claim 5 is characterized in that, described transmission low-frequency high-voltage test signal is sent to before the described test load by sampling network, also comprises:
Obtain the short-circuit calibration value that prestores;
Correspondingly, describedly calculate the capacitance-resistance value of described test load, also comprise afterwards according to described feedback signal:
Judge whether the described capacitance-resistance value that obtains satisfies pre-conditioned;
If satisfy, show that then there is not error in this test, with the described capacitance-resistance value that obtains as described check test value; If do not satisfy, show that then there is error in this test, the described capacitance-resistance value and the described short-circuit calibration value that prestores that obtain are carried out read group total, obtain the check test value.
7. a detection system is characterized in that, described system comprises: checkout equipment, test load;
Wherein, described checkout equipment comprises: control module, sampling resistor network, controlled short-circuit loop;
One end of described controlled short-circuit loop links to each other with the feedback loop of described sampling resistor network, and the other end links to each other with described control module, and described sampling resistor network one end connects described control module, and the other end links to each other with described test load;
The described sampling resistor network test signal that described control module is sent that is used to sample, and the back signal of will sampling is sent described control module back to;
Described controlled short-circuit loop is used for making the feedback loop of described sampling resistor network to be in short-circuit condition;
Described control module is used for making the feedback loop of described sampling resistor network be in short-circuit condition by controlling described controlled short-circuit loop, tests the capacitance-resistance value of described test load.
8. system according to claim 7, it is characterized in that, controlled short-circuit loop all in parallel on each group feedback loop in described sampling resistor network, an end of described controlled short-circuit loop connects the feedback loop of described sampling resistor network, and the other end connects described control module.
9. system according to claim 7, it is characterized in that, controlled short-circuit loop in parallel on any one group of feedback loop in described sampling resistor network, an end of described controlled short-circuit loop connects the feedback loop of described sampling resistor network, and the other end connects described control module.
10. detection system according to claim 7, it is characterized in that, described control module comprises gate-controlled switch, and described gate-controlled switch one end connects described controlled short-circuit loop, and described control module makes described controlled short-circuit loop be in conducting state by the closure of controlling described gate-controlled switch.
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| CN201010614406.0A CN102143279B (en) | 2010-12-28 | 2010-12-28 | Detecting device, method and system |
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| CN201010614406.0A CN102143279B (en) | 2010-12-28 | 2010-12-28 | Detecting device, method and system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311597A (en) * | 2000-05-17 | 2001-09-05 | 深圳市中兴通讯股份有限公司 | Test device and method for telephone line |
| CN101014063A (en) * | 2007-02-15 | 2007-08-08 | 华为技术有限公司 | Method and apparatus for measuring line capacity |
| CN101217594A (en) * | 2008-01-14 | 2008-07-09 | 中兴通讯股份有限公司 | A test method of insulation resistance and capacitance on telephone lines |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311597A (en) * | 2000-05-17 | 2001-09-05 | 深圳市中兴通讯股份有限公司 | Test device and method for telephone line |
| CN101014063A (en) * | 2007-02-15 | 2007-08-08 | 华为技术有限公司 | Method and apparatus for measuring line capacity |
| CN101217594A (en) * | 2008-01-14 | 2008-07-09 | 中兴通讯股份有限公司 | A test method of insulation resistance and capacitance on telephone lines |
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