CN102062818A - System for testing performance of leaky cable in simulation tunnel - Google Patents
System for testing performance of leaky cable in simulation tunnel Download PDFInfo
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- CN102062818A CN102062818A CN 201010547089 CN201010547089A CN102062818A CN 102062818 A CN102062818 A CN 102062818A CN 201010547089 CN201010547089 CN 201010547089 CN 201010547089 A CN201010547089 A CN 201010547089A CN 102062818 A CN102062818 A CN 102062818A
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Abstract
The invention discloses a system for testing performance of leaky cable in simulation tunnel. The tunnel simulating environment adopted by the testing system comprises a test rail, a test trolley, test instrument, an antenna and a special fixture for leaky cables, wherein the test rail is positioned in the centre of the tunnel; the test trolley runs on the rail; the test instrument and the antenna are mounted on the test trolley; and the special fixture for leaky cables is arranged on the tunnel wall. In the system for testing performance of leaky cable in simulation tunnel, the test environment is the simulated real mounting environment of the leaky cable, the test result of the system better approaches to the actual demands, more accurate data can be provided for a user in system design, and reasonable selection and application of the leaky cable are convenient for the user.
Description
Technical field
The present invention relates to a kind of leakage cable Performance Test System of simulation tunnel.Belong to the telecommunication cable industry, the performance when being used for simulation test and leaking cable and use in the various forms tunnel.
Background technology
Leaky coaxial cable is a kind of concentric cable that the transport property of existing transmission line has the aerial radiation characteristic again, is applicable to subway, tunnel, the long and narrow environment such as special area of constructure inner structure.To leaking the performance test of cable, each manufacturer generally carries out according to the IEC61196-4 standard, this standard code is at least within the right cylinder scope of 2m around the geometric center of leaking the cable axis and the diameter of center of antenna point, do not allow other metals or conductor except cable and antenna, belong to the free space testing standard, the Lou own radiation performance of cable can only be tested, the radiance under the cable actual installation environment Lou can't be learnt.
In addition, listed the over-all properties requirement of concentric cable in the various leaky coaxial cable standards in, as impedance, decay, standing wave, frequency of utilization etc., and only showing one of standard coupling loss (can be described as length coupling loss) aspect the radiated electric field characteristic at this, and in the omnidirectional antenna standard, listed performance requirement then has gain, directional diagram circularity, half-power width etc.; And owing to reasons such as cable laying, geographical environments, situation when mobile object, antenna can not keep vertical equidistant length coupling loss with the leaky coaxial cable slotted eye to detect always, therefore single length coupling loss test event also can not reflect leaky coaxial cable radiated electric field characteristic comprehensively.
Summary of the invention
Goal of the invention: the present invention provides a kind of test result leakage cable Performance Test System of simulation tunnel more accurately in order to solve the deficiencies in the prior art.
The technical solution used in the present invention: a kind of leakage cable Performance Test System of simulation tunnel, the simulation tunnel environment that described test macro adopts, comprise the middle position that is positioned at the tunnel test tracks, the test dolly that orbits, be installed in testing tool and antenna on the described test dolly, the cable jig is leaked in the special use that is arranged on the tunnel wall.
As optimization, described simulation tunnel is provided with square and circular two kinds of tunnel test environments, can select different environmental testings according to actual difformity tunnel.
Described tunnel wall is a reinforced concrete structure, and the top, tunnel is provided with bow member structure, the distribution requirement of the realistic tunnel of the distribution of bow member and reinforcing bar.
As a further improvement on the present invention, the wall thickness of described tunnel wall is 20～50 centimetres, and bar diameter is 8～15 millimeters in the described reinforced concrete structure, and the reinforcing bar interbody spacer is 10～40 millimeters, make simulated environment be consistent with actual environment, test result is more accurate.
Described test tracks is the bright track of I-shaped die; Described test dolly is the stainless steel dolly, and the travelling speed of test dolly is 0.05-60m/s.
As optimization, vibration abatement or antenna holder employing A-frame are installed on the described test dolly, prevent antenna vibrations in the trolley travelling process.
Described testing tool is the FSL frequency spectrograph, and test frequency can reach more than the 20GHz.
As optimization, what described antenna adopted is half-wave dipole antenna, Yagi antenna, omnidirectional antenna or the commercial antenna of normal mobile phone, the parts that fix up an aerial wire are rotatable, make the parallel leakage cable placement of antenna energy, vertical ground placement, parallel ground and vertically leak cable and place, can carry out corresponding radiation regimes test according to the different polarised directions of leaking cable, as horizontal checkout, vertical checkout or radiation regimes test; And antenna height is adjustable, antenna is also adjustable with leakage cable distance, like this not only can simulation test leak the length coupling loss performance under the cable actual installation environment, radiance in the time of can also drawing the different distance differing heights, can be described as height coupling loss and horizontal coupling loss, the radiation characteristic that can reflect leaky coaxial cable more all sidedly, whether can make the user understand leakage cable radiation characteristic in installation environment desirable, whether each point face coupling loss value changes steady, whether space electric field distributes even, also can recognize because of cable laying, reasons such as geographical environment cause mobile object, when antenna can not keep vertical equidistant situation with the leaky coaxial cable slotted eye always, leak the performance change of cable, make the user can or require according to actual conditions to avoid laying mistake in advance, for the user provides the Lou installation guide of cable.
The terrain clearance of described leakage cable special mould clamp on tunnel wall is the epitome of actual tunnel according to tunnel size and height of the carbody setting.
Described test macro is computer-controlled automatization test system, and is multiple functional, beautiful interface, whole test full-automation.
When utilizing the present invention to test leaking cable, main test performance is characteristic impedance, standing-wave ratio (SWR), transmission attenuation, length coupling loss, height coupling loss, horizontal coupling loss, radiation angle, directional diagram, and concrete steps are:
(1) will leak cable and be fixed on the tunnel wall with special mould clamp, an end is installed matched load, and the other end is connected on the network analyzer by wire jumper, draws out the standing-wave ratio (SWR) figure under impedance diagram and the different frequency range.
(2) will leak the cable two ends and be connected on simultaneously on the network analyzer, draw the transmission attenuation curve by wire jumper.
(3) treat the standard radio frequency signal of measured frequency and power in an end feed-in of leaking cable, another termination non-reflecting termination, on the test dolly, fixedly mounted half-wave dipole antenna, Yagi antenna, omnidirectional antenna or the commercial antenna of normal mobile phone, the height of antenna, determine by leaking cable actual installation environment with the horizontal range of leaking cable, opening power then, dolly is evenly moved in orbit, in this process, the signal level that test receiver will be coupled out from the leakage cable outer conductor slit that antenna receives transfers to computer, program in the computer is calculated automatically and is drawn when dolly is in diverse location according to the locating module of dolly, the length coupling loss curve between antenna and leakage cable.
(4) with the tested leaky coaxial cable slotted eye of standard dipole antenna quadrature, with leakage cable horizontal range same (3), it is static to detect dolly, and antenna height is risen to 2.5m by 0.5m, the coupling loss value during the record differing heights.
(5) with the tested leaky coaxial cable slotted eye of standard dipole antenna quadrature, highly with (3), it is static to detect dolly, and antenna is faded to 4m with leaking the cable horizontal range by 0.5m, the coupling loss value during record varying level spacing.
(6) the leakage cable (10m at least) of an amount of length of intercepting, testing length are longer than the physical length of cable (about each long 5m) with Louing, and the leakage cable is carried out the measurement of coupling loss, and the change calculations by the coupling loss figure goes out radiation angle.
(7) intercept the leakage cable of stretching mistake (3m at least), will leak cable during test and at the uniform velocity rotate a circle, the field intensity during test different rotary angle is drawn the directional diagram curve.
Beneficial effect: the leakage cable Performance Test System of simulation tunnel of the present invention, test environment is the leakage cable actual installation environment of simulation, the result who tests under this system more approaches actual demand, data more accurately are provided for the user when system design, make things convenient for the user leaking the choose reasonable and the application of cable.
Description of drawings
Fig. 1 is a circular tunnel test macro synoptic diagram;
Fig. 2 is a square tunnel test macro synoptic diagram;
Fig. 3 is a square tunnel cross-sectional view;
Fig. 4 is the circular tunnel cross-sectional view;
Fig. 5 is a simulation tunnel profile synoptic diagram.
Embodiment
Shown in accompanying drawing 1,2, a kind of leakage cable Performance Test System of simulation tunnel, the simulation tunnel environment that described test macro adopts, comprise the middle position that is positioned at the tunnel test tracks 1, the test dolly 2 that orbits, be installed in FSL frequency spectrograph testing tool 3 and antenna 4 on the described test dolly 2, be arranged at the leakage cable special mould clamp 6 on the tunnel wall 5, cable 7 usefulness of will being leaked hunting are leaked cable special mould clamp 6 and are fixed on the tunnel wall.
Described test tracks 1 is the bright track of I-shaped die, and described test dolly 2 is the stainless steel dolly, and the travelling speed of test dolly 2 is 0.05-60m/s, and the support that vibration abatement or antenna 4 are installed on the described test dolly 2 adopts A-frame; What described antenna 4 adopted is half-wave dipole antenna, Yagi antenna, omnidirectional antenna or the commercial antenna of normal mobile phone, and 4 the parts of fixing up an aerial wire are rotatable; The terrain clearance of described leakage cable special mould clamp 6 on tunnel wall is the epitome of actual tunnel according to tunnel size and height of the carbody setting.
Described test macro is computer-controlled automatization test system.
As shown in Figure 5,120 meters of a kind of simulation tunnel total lengths, wide 5 meters, simulation tunnel divides square and circular two kinds of tunnels, each 50 meters.Leak the real installation environment of cable for simulation, tunnel wall is reinforced concrete, and wall thickness is 35 centimeters, bar diameter is 12 millimeters, and the reinforcing bar interbody spacer is 25 millimeters, and the distribution of bow member and reinforcing bar meets the Tunnel Design requirement, its test environment meets the subway tunnel condition, and 8 is computer monitoring chambers among the figure.Fig. 4, c is the height of simulation tunnel among Fig. 5, and b is the wide of square tunnel, and d is the diameter of circular tunnel, and f is wide at the bottom of the circular tunnel spherical crown.
Claims (10)
1. the leakage cable Performance Test System of a simulation tunnel, it is characterized in that: the simulation tunnel environment that described test macro adopts, comprise the middle position that is positioned at the tunnel test tracks (1), test tracks (1) go up operation test dolly (2), be installed in testing tool (3) and antenna (4) on the described test dolly (2), be arranged at the leakage cable special mould clamp (6) on the tunnel wall (5).
2. the leakage cable Performance Test System of simulation tunnel according to claim 1, it is characterized in that: described simulation tunnel is provided with square and circular two kinds of tunnel test environments.
3. the leakage cable Performance Test System of simulation tunnel according to claim 1 is characterized in that: described tunnel wall (5) is reinforced concrete structure, and the top, tunnel is provided with bow member structure, the distribution requirement of the realistic tunnel of the distribution of bow member and reinforcing bar; The wall thickness of described tunnel wall (5) is 20～50 centimetres, and bar diameter is 8～15 millimeters in the described reinforced concrete structure, and the reinforcing bar interbody spacer is 10～40 millimeters.
4. the leakage cable Performance Test System of simulation tunnel according to claim 1 is characterized in that: described test tracks (1) is the bright track of I-shaped die.
5. the leakage cable Performance Test System of simulation tunnel according to claim 1, it is characterized in that: described test dolly (2) is the stainless steel dolly, the travelling speed of test dolly (2) is 0.05-60m/s.
6. the leakage cable Performance Test System of simulation tunnel according to claim 1 is characterized in that: the last support employing A-frame that vibration abatement or antenna (4) are installed of described test dolly (2).
7. the leakage cable Performance Test System of simulation tunnel according to claim 1, it is characterized in that: described testing tool (3) is the FSL frequency spectrograph.
8. the leakage cable Performance Test System of simulation tunnel according to claim 1 is characterized in that: what described antenna (4) adopted is half-wave dipole antenna, Yagi antenna, omnidirectional antenna or the commercial antenna of normal mobile phone, and the parts that fix up an aerial wire are rotatable.
9. the leakage cable Performance Test System of simulation tunnel according to claim 1 is characterized in that: the terrain clearance of described leakage cable special mould clamp (6) on tunnel wall (5) is the epitome of actual tunnel according to tunnel size and height of the carbody setting.
10. the leakage cable Performance Test System of simulation tunnel according to claim 1, it is characterized in that: described test macro is computer-controlled automatization test system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010547089 CN102062818A (en) | 2010-11-16 | 2010-11-16 | System for testing performance of leaky cable in simulation tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010547089 CN102062818A (en) | 2010-11-16 | 2010-11-16 | System for testing performance of leaky cable in simulation tunnel |
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| CN102062818A true CN102062818A (en) | 2011-05-18 |
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| CN 201010547089 Pending CN102062818A (en) | 2010-11-16 | 2010-11-16 | System for testing performance of leaky cable in simulation tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730983A (en) * | 2021-01-15 | 2021-04-30 | 焦作铁路电缆有限责任公司 | Method for testing leaky coaxial cable |
| CN113504416A (en) * | 2021-06-11 | 2021-10-15 | 中国人民解放军海军工程大学 | Leakage cable testing system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09118224A (en) * | 1995-10-27 | 1997-05-06 | Nkk Corp | Moving monitoring device of conduit |
| US6456822B1 (en) * | 1996-11-26 | 2002-09-24 | Netline Communications Technologies (Nct), Ltd. | Electronic device and method for blocking cellular communication |
| CN101351011A (en) * | 2007-07-18 | 2009-01-21 | 中国移动通信集团公司 | Universal external field wireless test system |
-
2010
- 2010-11-16 CN CN 201010547089 patent/CN102062818A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09118224A (en) * | 1995-10-27 | 1997-05-06 | Nkk Corp | Moving monitoring device of conduit |
| US6456822B1 (en) * | 1996-11-26 | 2002-09-24 | Netline Communications Technologies (Nct), Ltd. | Electronic device and method for blocking cellular communication |
| CN101351011A (en) * | 2007-07-18 | 2009-01-21 | 中国移动通信集团公司 | Universal external field wireless test system |
Non-Patent Citations (1)
| Title |
|---|
| 《中国通信学会年光缆电缆学术年会论文集》 20071231 蓝燕锐 移动通信用漏泄射频同轴电缆 457-464 1-10 , * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730983A (en) * | 2021-01-15 | 2021-04-30 | 焦作铁路电缆有限责任公司 | Method for testing leaky coaxial cable |
| CN112730983B (en) * | 2021-01-15 | 2024-04-12 | 焦作铁路电缆有限责任公司 | Test method for leaky coaxial cable |
| CN113504416A (en) * | 2021-06-11 | 2021-10-15 | 中国人民解放军海军工程大学 | Leakage cable testing system and method |
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Application publication date: 20110518 |