CN103095527A - Method and system for measuring signal transmission time - Google Patents
Method and system for measuring signal transmission time Download PDFInfo
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- CN103095527A CN103095527A CN2013100037660A CN201310003766A CN103095527A CN 103095527 A CN103095527 A CN 103095527A CN 2013100037660 A CN2013100037660 A CN 2013100037660A CN 201310003766 A CN201310003766 A CN 201310003766A CN 103095527 A CN103095527 A CN 103095527A
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Abstract
The invention discloses method and system for measuring signal transmission time. The system for measuring signal transmission time comprises a testing node, a tested node and a wire with an insulation outer jacket, wherein the testing node and the tested node are connected through the wire with the insulation outer jacket; the testing node is used for sending out testing signals to the tested node through the wire with the insulation outer jacket, and starting timing at the same time of sending out the testing signals, besides, receiving testing response signals of the tested node, and stopping timing at the same time of receiving the testing response signals, further, obtaining time difference of sending the testing signals and receiving the testing response signals according to timing; the tested node is used for receiving the testing signals sent by the testing node, and returning the testing response signals to the testing node through the wire with the insulation outer jacket. The method and system for measuring signal transmission time improve measuring accuracy of the signal transmission time and lower hardware requirement of a measuring system and hardware cost.
Description
Technical field
The present invention relates to the communications field, particularly the method and system in a kind of measuring-signal transmission time.Background technology
In network communicating system, some service need to be carried out expliciting the position to making the distributing position that is wired to the communication node in network.
Because the signal transmission time between node is proportional to distance between node, therefore can locate tested node with respect to the distributing position of host node by measuring between host node and tested node signal transmission time.Concrete, a host node is set in network, tested node can be any one by wire be connected in this network from node, the signal transmission time between host node and tested node refers to initiate time difference test signal listens to tested node to host node test response signal from host node.
In existing signal transit time measurement, the clock frequency of using when often testing by raising improves the accuracy of measurement, like this, during not only for measurement, precision of hardware requires very high, and require tested node that very fast response speed is arranged, cause that hardware cost is high, power consumption is large, and between node distance hour measurement accuracy is not high yet.
Summary of the invention
The method and system in measuring-signal transmission time provided by the invention, in existing signal transit time measurement, hardware cost is high to solve, power consumption large and the not high problem of measurement accuracy.
The invention provides the system in a kind of measuring-signal transmission time, described system comprises: test node, tested node and with the wire of insulation sheath, and described test node is connected by described wire with insulation sheath with described tested node;
Described test node is used for sending test signal by described wire with insulation sheath to described tested node, and begins timing when sending test signal; And, receive the test response signal that described tested node returns, and stop timing when receiving described test response signal; And, obtain sending test signal and receive time difference between test response signal according to timing;
Described tested node is used for receiving the test signal that described test node sends, and returns to test response signal by described wire with insulation sheath to described test node.
In such scheme, the relative dielectric constant of described insulation sheath is greater than the first default set point.
In such scheme, the material of described insulation sheath is oil-paper, not drip paper, polystyrene, crosslinked polyethylene, polyvinylchloride, natural rubber, ethylene-propylene rubber, butadiene-styrene rubber, butyl rubber, flame-proof PVC, low-smoke non-halogen flame-retardant PVC or the special-purpose high frequency polyolefin of communicating by letter.
In such scheme, the thickness of described insulation sheath is greater than the second default set point.
The present invention also provides a kind of system of measuring distance, and described system comprises: test node, tested node and with the wire of insulation sheath, and described test node is connected by described wire with insulation sheath with described tested node;
Described test node is used for sending test signal by described wire with insulation sheath to described tested node, and begins timing when sending test signal; And, receive the test response signal that described tested node returns, and stop timing when receiving described test response signal; And, obtain sending test signal and receive time difference between test response signal according to timing, and calculate distance between self and described tested node according to the described time difference;
Described tested node is used for receiving the test signal that described test node sends, and returns to test response signal by described wire with insulation sheath to described test node.
The present invention also provides a kind of method in measuring-signal transmission time, and described method comprises:
Test node sends test signal by the wire with insulation sheath to described tested node, and begins timing when sending test signal;
Test node receives the test response signal that described tested node returns, and stops timing when receiving described test response signal; Wherein, when described test response signal is the described test signal of described tested node reception, return by described wire with insulation sheath;
Test node obtains sending test signal according to timing and receives time difference between test response signal.
In such scheme, the relative dielectric constant of described insulation sheath is greater than the first default set point.
In such scheme, the material of described insulation sheath is oil-paper, not drip paper, polystyrene, crosslinked polyethylene, polyvinylchloride, natural rubber, ethylene-propylene rubber, butadiene-styrene rubber, butyl rubber, flame-proof PVC, low-smoke non-halogen flame-retardant PVC or the special-purpose high frequency polyolefin of communicating by letter.
In such scheme, the thickness of described insulation sheath is greater than the second default set point.
The present invention also provides a kind of method of measuring distance, and described method comprises:
Test node sends test signal by the wire with insulation sheath to described tested node, and begins timing when sending test signal;
Test node receives the test response signal that described tested node returns, and stops timing when receiving described test response signal; Wherein, when described test response signal is the described test signal of described tested node reception, return by described wire with insulation sheath;
Test node obtains sending test signal according to timing and receives time difference between test response signal, and calculates distance between self and described tested node according to the described time difference.
the beneficial effect of the embodiment of the present invention is: test node and tested node are by the wire transmission signal with insulation sheath, because insulation sheath has higher relative dielectric constant, reduced the wave velocity that signal transmits in wire, the time that makes signal transmit in wire is longer, thereby weakened the timing error of the response error of tested node and test node to the impact of measurement result, improved the certainty of measurement of signal transmission time, be equivalent to and reduce counting pulse frequency, finally reach the purpose that reduces measuring system hardware requirement and hardware cost, reduced simultaneously the power consumption of measuring system, with less cost, complete higher performance requirement.
Description of drawings
Fig. 1 is the composition structural representation of the system in measuring-signal transmission time of the present invention;
Fig. 2 is the realization flow figure of the method in measuring-signal transmission time of the present invention;
Fig. 3 is the specific implementation flow chart of the method preferred embodiment in measuring-signal transmission time of the present invention;
Fig. 4 calculates the schematic diagram of signal transmission time in the method in measuring-signal transmission time of the present invention;
Fig. 5 is the realization flow figure of the method for measuring distance of the present invention.
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.
Referring to Fig. 1, the system in the measuring-signal transmission time that provides for the embodiment of the present invention, this system mainly can comprise: test node 11, tested node 12 and with the wire 13 of insulation sheath connect by the wire 13 with insulation sheath between described test node 11 and tested node 12; Wherein, test node 11 sends test signal by described wire 13 with insulation sheath to described tested node 12, and begins timing when sending test signal; And, be used for receiving the test response signal that described tested node 12 returns, and stop timing when receiving described test response signal; Obtain sending test signal and receive time difference between test response signal according to timing; Tested node 11 is used for receiving by described wire 13 with insulation sheath the test signal that described test node 12 sends, and returns to test response signal by described wire 13 with insulation sheath to described test node 11.
Accordingly, the embodiment of the present invention also provides the method for utilizing the said system measuring-signal transmission time, and as shown in Figure 2, described method mainly can comprise the steps:
Step 201: test node sends test signal by the wire with insulation sheath to described tested node, and begins timing when sending test signal;
Step 202: tested node receives the test signal that described test node sends, and returns to test response signal by described wire with insulation sheath to described test node;
Step 203: test node receives the test response signal that described tested node returns, and stops timing when receiving described test response signal;
Step 204: test node obtains sending test signal according to timing and receives time difference between test response signal.
Preferably, described test node can adopt the mode measurement of step-by-step counting to send test signal and receive time difference between test response signal.
Concrete, as shown in Figure 3, the specific implementation flow process of above-mentioned measuring-signal transmission time method can comprise the steps:
Step 301: test node is initiated test in the test time slot that is tested Node configuration, generate test signal, by the wire with insulation sheath, test signal is sent to test node, and open the pulser timer of self when sending test signal, the beginning timing;
Step 302: test signal arrives tested node by the wire transmission with insulation sheath;
Step 303: tested node receives described test signal, after processing through response, generates test response signal, and by described wire with insulation sheath, described test response signal is returned to described test node;
Step 304: test response signal by with the wire transmission of insulation sheath to test node;
Step 305: test node receives described test response signal, and closes described pulser timer when receiving described test response signal, stops timing;
Step 306: test node is according to the counting pulse frequency of described pulser timer and the counting that obtains thereof, and calculates the time that between self and tested node, the signal transmission is used.
As shown in Figure 4, in above-mentioned flow process, if test signal is Δ t1 from test node to the time that tested node transmission is used, test response signal is transmitted the time of using from tested node to test node be Δ t2, the time that tested node responds processing is Δ t3, and the error that timing is relevant is Δ t4, so, the signal transmission time Δ t that finally measures can be Δ t1, Δ t2, Δ t3 and Δ t4 sum, that is to say: Δ t=Δ t1+ Δ t2+ Δ t3+ Δ t4.Wherein, when Δ t3 and Δ t4 were far smaller than Δ t1, Δ t2 or Δ t1 and Δ t2 sum, Δ t3 can be used as the response error of tested node and ignores, and Δ t4 can be used as the timing error of test node and ignores.
Preferably, the relative dielectric constant ε of wire 13 insulation sheathes is greater than the first default set point.Like this, because the insulation sheath of wire has higher relative dielectric constant ε, reduced the wave velocity that signal transmits in wire, the spent time of signal transmission will be long, that is to say, increase the relative dielectric constant of wire sheath, will increase Δ t1+ Δ t2, and Δ t3+ Δ t4 changes not, Δ t3 and Δ t4 will be far smaller than Δ t1, Δ t2 or Δ t1 and Δ t2 sum, the corresponding raising of certainty of measurement, thus System Hardware Requirement and counting precision requirement can be reduced.Wherein, described the first set point can determine according to the needs of practical application, and different measurement requirements can arrange the first different set points.For example, the first set point can be taken as 4～5, to satisfy node to be measured at a distance of 10m, the counting pulse frequency certainty of measurement requirement as 37.5MHz; Perhaps, the first set point can also be taken as 2.0～2.8, to satisfy node to be measured at a distance of 10m, the counting pulse frequency certainty of measurement requirement as 51.5MHz.
Here, can increase by the mode that adopts different wire-insulating materials and/or increase insulation sheath thickness the relative dielectric constant of insulation sheath on wire 13.Particularly, satisfy formula V=S* (μ * ε) between the relative dielectric constant ε of the velocity of wave V that transmits of signal and insulation sheath in wire
(1/2), wherein, S is the speed of light transmission in vacuum, μ be around wire medium relative permeability, ε is the relative dielectric constant of insulation sheath.
In practical application, the larger wire-insulating material of the preferred relative dielectric constant ε of the insulation sheath of wire actually can according to the difference of System Hardware Requirement in test lead, be selected different wire-insulating materials.For example, can select oil-paper, not drip paper, polystyrene, crosslinked polyethylene, polyvinyl chloride (PVC), natural rubber, ethylene-propylene rubber, butadiene-styrene rubber, butyl rubber, flame-proof PVC, low-smoke non-halogen flame-retardant PVC or the special-purpose high frequency polyolefin of communicating by letter.Relative dielectric constant ε and the velocity of wave of wire-insulating material commonly used are as shown in table 1.
According to table 1, if select polyvinyl chloride as insulation sheath, when distance was 10m between test node and tested node, Δ t1 was 10m*2/(142m/ μ s) ≈ 141ns; If select ethylbenzene rubber as insulation sheath, when distance is 10m between test node and tested node, Δ t1 is 10m*2/(200m/ μ s)=100ns, if reach identical counting effect, select polyvinyl chloride to use the counting pulse frequency of 35.7MHz as insulation sheath, select ethylbenzene rubber to need the counting pulse frequency of 50MHz as insulation sheath, can obviously find out thus, the relative dielectric constant that increases the wire insulation crust can reduce System Hardware Requirement and counting precision requirement greatly.
Table 1
In addition, can also increase its relative dielectric constant by the thickness that increases insulation sheath, reduce the wave velocity that signal transmits in wire, and then strengthen the spent time of signal transmission, improve certainty of measurement, reduce System Hardware Requirement and counting precision requirement.Preferably, the thickness of insulation sheath is good greater than the second default set point.Wherein, can according to the difference of the selected material of insulation sheath and the difference of testing requirement, set the second different set points.For example, for the polyvinyl chloride insulation crust, the value of the second set point is set to 0.7mm, and the dielectric constant empirical value is 4 so, and satisfying main survey node and node to be measured is the certainty of measurement demand of 37.5MHz at a distance of 10m, theoretical counting pulse frequency; The value of the second set point is set to 2.4mm, and the dielectric constant empirical value is 7.4 so, to satisfy main survey node and node to be measured be the certainty of measurement demand of 20.3MHz at a distance of 10m, theoretical counting pulse frequency;
Accordingly, the embodiment of the present invention also provides a kind of system of measuring distance, the composition structure of described system is identical with the system in measuring-signal shown in Figure 1 transmission time, difference is, in the system of this measuring distance test node is after obtaining the time difference, also is used for calculating distance between self and tested node according to the described time difference.
As shown in Figure 5, a kind of method that the embodiment of the present invention also provides system that utilizes above-mentioned measuring distance to carry out range measurement, described method can comprise the steps:
Step 504: test node obtains sending test signal according to timing and receives time difference between test response signal, and calculates distance between self and described tested node according to the described time difference.
Wherein, can by the time difference with obtain described distance with the product of the velocity of wave of signal transmission in the wire of insulation sheath.
In practical application, can be by the signal transmission time between above-mentioned flow process a plurality of tested nodes of measurement and test node, determine distance between each tested node and test node based on signal transmission time again, finally orient each tested node with respect to the position of test node.Here, described test node can be the host node of a network, each tested node can be connected on this host node from node, to be connected by the wire with insulation sheath with host node from node, can obtain respectively from the signal transmission time between node and host node by above-mentioned flow process, and then the location obtains the topological diagram of above-mentioned network respectively from the position of node with respect to host node.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. the system in a measuring-signal transmission time, is characterized in that, described system comprises: test node, tested node and with the wire of insulation sheath, and described test node is connected by described wire with insulation sheath with described tested node;
Described test node is used for sending test signal by described wire with insulation sheath to described tested node, and begins timing when sending test signal; And, receive the test response signal that described tested node returns, and stop timing when receiving described test response signal; And, obtain sending test signal and receive time difference between test response signal according to timing;
Described tested node is used for receiving the test signal that described test node sends, and returns to test response signal by described wire with insulation sheath to described test node.
2. the system in measuring-signal transmission time according to claim 1, is characterized in that, the relative dielectric constant of described insulation sheath is greater than the first default set point.
3. the system in measuring-signal transmission time according to claim 1 and 2, it is characterized in that, the material of described insulation sheath is oil-paper, not drip paper, polystyrene, crosslinked polyethylene, polyvinylchloride, natural rubber, ethylene-propylene rubber, butadiene-styrene rubber, butyl rubber, flame-proof PVC, low-smoke non-halogen flame-retardant PVC or the special-purpose high frequency polyolefin of communicating by letter.
4. the system in measuring-signal transmission time according to claim 1 and 2, is characterized in that, the thickness of described insulation sheath is greater than the second default set point.
5. the system of a measuring distance, is characterized in that, described system comprises: test node, tested node and with the wire of insulation sheath, and described test node is connected by described wire with insulation sheath with described tested node;
Described test node is used for sending test signal by described wire with insulation sheath to described tested node, and begins timing when sending test signal; And, receive the test response signal that described tested node returns, and stop timing when receiving described test response signal; And, obtain sending test signal and receive time difference between test response signal according to timing, and calculate distance between self and described tested node according to the described time difference;
Described tested node is used for receiving the test signal that described test node sends, and returns to test response signal by described wire with insulation sheath to described test node.
6. the method in a measuring-signal transmission time, is characterized in that, described method comprises:
Test node sends test signal by the wire with insulation sheath to described tested node, and begins timing when sending test signal;
Test node receives the test response signal that described tested node returns, and stops timing when receiving described test response signal; Wherein, when described test response signal is the described test signal of described tested node reception, return by described wire with insulation sheath;
Test node obtains sending test signal according to timing and receives time difference between test response signal.
7. the method in measuring-signal transmission time according to claim 6, is characterized in that, the relative dielectric constant of described insulation sheath is greater than the first default set point.
8. the method according to claim 6 or 7 described measuring-signal transmission times, it is characterized in that, the material of described insulation sheath is oil-paper, not drip paper, polystyrene, crosslinked polyethylene, polyvinylchloride, natural rubber, ethylene-propylene rubber, butadiene-styrene rubber, butyl rubber, flame-proof PVC, low-smoke non-halogen flame-retardant PVC or the special-purpose high frequency polyolefin of communicating by letter.
9. the method according to claim 6 or 7 described measuring-signal transmission times, is characterized in that, the thickness of described insulation sheath is greater than the second default set point.
10. the method for a measuring distance, is characterized in that, described method comprises:
Test node sends test signal by the wire with insulation sheath to described tested node, and begins timing when sending test signal;
Test node receives the test response signal that described tested node returns, and stops timing when receiving described test response signal; Wherein, when described test response signal is the described test signal of described tested node reception, return by described wire with insulation sheath;
Test node obtains sending test signal according to timing and receives time difference between test response signal, and calculates distance between self and described tested node according to the described time difference.
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| WO2015192374A1 (en) * | 2014-06-20 | 2015-12-23 | 奇点新源国际技术开发(北京)有限公司 | Method and device for measuring distance characteristic information |
| CN115103007A (en) * | 2022-05-19 | 2022-09-23 | 亿点云计算(珠海)有限公司 | Service discovery method and device based on distributed cloud and readable storage medium |
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Cited By (4)
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| WO2015192374A1 (en) * | 2014-06-20 | 2015-12-23 | 奇点新源国际技术开发(北京)有限公司 | Method and device for measuring distance characteristic information |
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