CN107765098A - A kind of urban track traffic track longitudinal electrical resistance test device and method - Google Patents
A kind of urban track traffic track longitudinal electrical resistance test device and method Download PDFInfo
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- CN107765098A CN107765098A CN201711183192.4A CN201711183192A CN107765098A CN 107765098 A CN107765098 A CN 107765098A CN 201711183192 A CN201711183192 A CN 201711183192A CN 107765098 A CN107765098 A CN 107765098A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
A kind of urban track traffic track longitudinal electrical resistance test device and method, device include：Data acquisition module, for gathering the analog quantity of electric current and voltage；Data conversion module, for analog quantity to be converted into digital quantity and is uploaded to CUP main control modules；CPU main control modules, the processing of control, data for mode of operation；Wireless communication module, the transmitting-receiving for control instruction, data；Detection backstage, for the control to high-power controllable DC current source module and the output result of display CPU main control modules；High-power controllable DC current source module, for the Injection Current into contact net and track.Method：Contact net select section carry out carry out contact net longitudinal electrical resistance test；By two test devices of end set between the rail of descending contact net and section to be measured, the test of track longitudinal electrical resistance is carried out.The apparatus and method can easily realize the test of track longitudinal electrical resistance, can effectively solve the problems, such as the test inconvenience of long range track longitudinal electrical resistance.
Description
Technical field
The invention belongs to Railway Electric technical field, and in particular to a kind of urban track traffic track longitudinal electrical resistance test dress
Put and method.
Background technology
At present, domestic and international urban track traffic generally uses DC traction power-supply system, and train obtains electric energy by contact net,
Traction current returns to traction substation Rectification Power Factor negative pole by rail, and rail turns into the current return circuit of traction current.
DC traction power-supply system uses floating ground mode, is insulated between rail and the earth.Because rail itself has
Certain longitudinal electrical resistance, traction current can form potential difference, referred to as rail potential when flowing back between in-orbit ground.Track longitudinal direction electricity
Hindering conference causes rail potential to raise.Too high rail potential can cause passenger accident of human electric shock, trackside equipment sparking to burn
The problems such as erosion, increase of system stray electrical current.Meanwhile rail potential is above standard after prescribed limits, side rail wear meeting
Close a floodgate, now, a large amount of back flow currents can be leaked by the side rail wear of combined floodgate, and circuit stray electrical current level increases greatly
Add.According to actual track test result, flow through combined floodgate side rail wear leak to periphery the earth current amplitude it is reachable
800A.Currently, rail potential problem has turned into the most important safety problems of domestic and international the urban transportation.
An important factor for track longitudinal electrical resistance is decision systems rail potential level.For limitation urban track traffic rail electricity
, require that track longitudinal electrical resistance is not more than 0.01 Ω/km (four rail bar parallel connections) in actual track.Due to all fronts after railroad embankment
Rail seamless welding, made troubles to the test of line track longitudinal electrical resistance, do not have also long range track longitudinal in current line
Method for testing resistance so that line construction, operation process middle orbit longitudinal electrical resistance assess test missing.
The content of the invention
In view of the above-mentioned problems of the prior art, it is an object of the invention to provide a kind of urban track traffic track longitudinal direction
Resistance testing device, the device easily realize the test of track longitudinal electrical resistance, can effectively solve long range track longitudinal electrical resistance
Test inconvenience the problem of, can for line construction, run process middle orbit longitudinal electrical resistance assessment reliable foundation be provided.
To realize upper purpose, the invention provides a kind of urban track traffic track longitudinal electrical resistance test device, including：
Data acquisition module, for gathering the analog data of electric current and voltage and being transferred to data conversion module；
Data conversion module, for the analog data of collection to be converted into digital data and is uploaded to CUP master control moulds
Block；
CPU main control modules, the processing of control, data for mode of operation；
Wireless communication module, it is connected with CPU main control modules, the transmitting-receiving for control instruction, data；
Detection backstage, is connected with high-power controllable DC current source module and CPU main control modules, for test process respectively
In showing to high-power controllable DC current source module control and to the test result of CPU main control modules output；
High-power controllable DC current source module, for injecting electricity into contact net and track according to the control on detection backstage
Stream.
In the technical scheme, by making to be provided with high-power controllable DC current source module in test device, can conveniently it exist
The injection of electric current in test process, CPU main control modules and high-power controllable DC current source module are connected by detection platform, no
Only the data after the processing of CPU main control modules of reception can intuitively be shown in order to detection platform, and energy side
Convenient to operate person controls the action of high-power controllable DC current source module by detection platform.By being provided with and CPU master control moulds
The wireless communication module of block connection, it is wireless type that can make the communication between test device, and then is avoided that and is carrying out long range rail
In road longitudinal electrical resistance test process the problem of the laying of the communications cable, the device can easily and fast realize track longitudinal electrical resistance
Test, can solve the problems, such as that the test of long range track longitudinal electrical resistance is inconvenient, can be line construction, operation process middle orbit longitudinal direction electricity
The assessment of resistance provides reliable foundation.
Further, in order to facilitate the access of data, in addition to the data storage being connected with CPU main control modules, the number
It is used for the access of test data according to memory.
As a preferred embodiment, the wireless communication module is gsm communication module.
It is a further object to provide a kind of urban track traffic track longitudinal electrical resistance method of testing, this method energy
The test to track longitudinal electrical resistance is easily and fast realized, the laying of long range test cable can be effectively prevented from, and can be effective
Cost input in test process is saved on ground.
To achieve these goals, the present invention also provides a kind of urban track traffic track longitudinal electrical resistance method of testing, wraps
Include following steps：
S1：After system cut-off, the DC feedback breaker in power supply section both sides traction substation is disconnected, makes to be located at phase
A, B both ends of the contact net being made up of parallel upcoming contact net and descending contact net between adjacent insulation joint form disconnection
State, short circuit is carried out between upcoming contact net and the A ends of descending contact net using the first short-circuiting cable, and in the A of contact net
Each one test device of access in end and B ends, the test device of the side a and b of contact net respectively as test main frame and test from
Machine, the positive pole and negative pole of the high-power controllable DC current source module in two test devices respectively connect upcoming contact net and
Descending contact net；
S2：By high-power controllable DC current source module Injection Current into contact net in test main frame, meanwhile, survey
The electric current I that data collecting module collected test main frame in examination main frame is injected into contact net1, upcoming contact net and descending contact
Potential difference U between the A ends of net11；Meanwhile control instruction is sent to test slave by test main frame, test slave is receiving
After the instruction, the data collecting module collected upcoming contact net in test slave and the potential difference between the B ends of descending contact net
U12；After collection terminates, data measured is uploaded to test main frame by test slave, and test main frame carries out contact net longitudinal electrical resistance meter
Calculate, show and store；
S3：Using the second short-circuiting cable by one end in the rail of the A ends of descending contact net and section to be measured close to A ends
Short circuit, and respectively access a test device, the test dress of the side a and b of descending contact net in the side a and b of descending contact net
Put negative with the high-power controllable DC current source module of test slave respectively as test main frame and test slave, test main frame
Pole is connected with close to the one end at A ends in the rail of section to be measured and close to the one end at B ends respectively, test main frame and test slave
Side a and b of the positive pole respectively with descending contact net of high-power controllable DC current source module be connected；By in test main frame
The high-power controllable downward row contact net Injection Current of DC current source module, meanwhile, the data acquisition module in test main frame
The electric current I that collecting test main frame injects into contact net2, potential difference U between descending contact net and rail21；Meanwhile pass through
Test main frame sends control instruction to test slave, and test slave is after the instruction is received, the data acquisition module in test slave
Block gathers the potential difference U between descending contact net and rail22；After collection terminates, data measured is uploaded to survey by test slave
Try main frame；
S4:Test main frame carries out the calculating of longitudinal electrical resistance using the data received, while result of calculation is shown
And store.
Further, in order to improve measuring accuracy, the computational methods of longitudinal electrical resistance include accepting step in the S4：
Step 1：Using the test data in S2, contact net longitudinal electrical resistance R is obtained by formula (1)cw；
Wherein, L in formula1For the distance between contact net side a and b；
Step 2：Using the test data in S3, the longitudinal electrical resistance R of track is obtained by formula (2)gd；
Wherein, L in formula2For the length of rail section to be measured.
Method in the present invention can automatic, simple, effectively realize the test of track longitudinal electrical resistance, utilize demarcation longitudinal direction electricity
The contact net of resistance effectively prevent the laying of long range test cable, dramatically saves in test process as current return circuit
The input cost of man power and material, and high-precision test can be realized.
Brief description of the drawings
Fig. 1 is the structural representation of test device in the present invention；
Fig. 2 is the flow chart of the method for testing in the present invention；
Fig. 3 is that contact net longitudinal electrical resistance demarcates test schematic diagram in the present invention；
Fig. 4 is middle orbit longitudinal electrical resistance test schematic diagram of the present invention.
In figure：11st, upcoming contact net；12nd, descending contact net；13rd, test device；14th, insulation joint；15th, DC feedback breaks
Road device；16th, the first short-circuiting cable；17th, rail；18th, cable is flowed；19th, the second short-circuiting cable.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of urban track traffic track longitudinal electrical resistance test device, including：
Data acquisition module, for gathering the analog data of electric current and voltage and being transferred to data conversion module；
Data conversion module, for the analog data of collection to be converted into digital data and is uploaded to CUP master control moulds
Block；
CPU main control modules, the processing of control, data for mode of operation；
Wireless communication module, it is connected with CPU main control modules, the transmitting-receiving for control instruction, data；
Detection backstage, is connected with high-power controllable DC current source module and CPU main control modules, for test process respectively
In showing to high-power controllable DC current source module control and to the test result of CPU main control modules output；
High-power controllable DC current source module, for injecting electricity into contact net and track according to the control on detection backstage
Stream.
Also include the data storage being connected with CPU main control modules, the data storage is used for the access of test data.
The wireless communication module is gsm communication module.
As shown in Figure 3 and Figure 4, a kind of urban track traffic track longitudinal electrical resistance method of testing, comprises the following steps：
S1：After system cut-off, the DC feedback breaker 15 in power supply section both sides traction substation is disconnected, makes to be located at
A, B both ends of the contact net being made up of parallel upcoming contact net 11 and descending contact net 12 between adjacent insulation joint 14
Off-state is formed, short circuit is carried out between upcoming contact net 11 and the A ends of descending contact net 12 using the first short-circuiting cable 16,
And respectively access a test device 13 in the side a and b of contact net, the test device 13 of the side a and b of contact net respectively as
Test main frame and test slave, the positive pole and negative pole of the high-power controllable DC current source module in two test devices 13 are divided equally
Lian Jie not upcoming contact net 11 and descending contact net 12；
S2：By high-power controllable DC current source module Injection Current into contact net in test main frame, meanwhile, survey
The electric current I that data collecting module collected test main frame in examination main frame is injected into contact net1, upcoming contact net 11 and descending connect
Potential difference U between the A ends of net-fault 1211；Meanwhile control instruction is sent to test slave by test main frame, test slave exists
After receiving the instruction, test between the data collecting module collected upcoming contact net 11 in slave and the B ends of descending contact net 12
Potential difference U12；After collection terminates, data measured is uploaded to test main frame by test slave, and test main frame carries out contact net longitudinal direction
Resistance calculations, display and storage；After the completion of above-mentioned work, test main frame and test slave power-off.
S3：Using the second short-circuiting cable 19 by the rail 17 of the A ends of descending contact net 12 and section to be measured close to A ends
Shorted on one end, and descending contact net 12 side a and b respectively access a test device 13, the A ends of descending contact net 12 and
The test device 13 at B ends is respectively as test main frame and tests slave, the high-power controllable direct current of test main frame and test slave
The negative pole of current source module is connected with close to the one end at A ends in the rail 17 of section to be measured and close to the one end at B ends respectively, is surveyed
Try the positive pole side a and b with descending contact net 12 respectively of the high-power controllable DC current source module of main frame and test slave
Connection；By the high-power controllable downward Injection Current of row contact net 12 of DC current source module in test main frame, meanwhile, test
The electric current I that data collecting module collected test main frame in main frame is injected into contact net2, descending contact net 12 and rail 17
Between potential difference U21；Meanwhile control instruction is sent to test slave by test main frame, test slave is receiving the instruction
Afterwards, the potential difference U tested between the descending contact net 12 of data collecting module collected and rail 17 in slave22；Collection terminates
Afterwards, data measured is uploaded to test main frame by test slave；Wherein connected between rail 17 by flowing cable 18；Above-mentioned work
After the completion of work, test main frame and test slave power-off.
S4:Test main frame carries out the calculating of longitudinal electrical resistance using the data received, while result of calculation is shown
And store.
Control instruction, test data are realized by GSM communication modules between test main frame and test slave in above step
Wireless type transmission.
The computational methods of longitudinal electrical resistance include accepting step in the S4：
Step 1：Using the test data in S2, contact net longitudinal electrical resistance R is obtained by formula (1)cw；
Wherein, L in formula1For the distance between contact net side a and b；
Step 2：Using the test data in S3, the longitudinal electrical resistance R of track is obtained by formula (2)gd；
Wherein, L in formula2For the length of rail section to be measured.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (5)
- A kind of 1. urban track traffic track longitudinal electrical resistance test device, it is characterised in that including：Data acquisition module, for gathering the analog data of electric current and voltage and being transferred to data conversion module；Data conversion module, for the analog data of collection to be converted into digital data and is uploaded to CUP main control modules；CPU main control modules, the processing of control, data for mode of operation；Wireless communication module, it is connected with CPU main control modules, the transmitting-receiving for control instruction, data；Detection backstage, is connected with high-power controllable DC current source module and CPU main control modules, in test process respectively Showing to high-power controllable DC current source module control and to the test result of CPU main control modules output；High-power controllable DC current source module, for according to detection backstage control into contact net and track Injection Current.
- 2. a kind of urban track traffic track longitudinal electrical resistance test device according to claim 1, it is characterised in that also wrap The data storage being connected with CPU main control modules is included, the data storage is used for the access of test data.
- A kind of 3. urban track traffic track longitudinal electrical resistance test device according to claim 1 or 2, it is characterised in that The wireless communication module is gsm communication module.
- 4. a kind of urban track traffic track longitudinal electrical resistance method of testing, it is characterised in that comprise the following steps：S1：After system cut-off, the DC feedback breaker (15) in power supply section both sides traction substation is disconnected, makes to be located at phase A, B of the contact net being made up of parallel upcoming contact net (11) and descending contact net (12) between adjacent insulation joint (14) Both ends formed off-state, using the first short-circuiting cable (16) the A ends of upcoming contact net (11) and descending contact net (12) it Between carry out short circuit, and respectively access a test device as described in any one of claims 1 to 3 in the side a and b of contact net (13), the test device (13) of the side a and b of contact net is respectively as test main frame and test slave, two test devices (13) positive pole and negative pole of the high-power controllable DC current source module in respectively connect upcoming contact net (11) and descending connect Touch net (12)；S2：By high-power controllable DC current source module Injection Current into contact net in test main frame, meanwhile, test master The electric current I that data collecting module collected test main frame in machine is injected into contact net1, upcoming contact net (11) and descending contact Potential difference U between the A ends of net (12)11；Meanwhile control instruction is sent to test slave by test main frame, test slave exists The data collecting module collected upcoming contact net (11) tested after receiving the instruction in slave and the B ends of descending contact net (12) Between potential difference U12；After collection terminates, data measured is uploaded to test main frame by test slave, and test main frame carries out contact net Longitudinal electrical resistance is calculated, shows and stored；S3：Using the second short-circuiting cable (19) by the rail (17) of the A ends of descending contact net (12) and section to be measured close to A The shorted on one end at end, and respectively access a test device (13), descending contact net in the side a and b of descending contact net (12) (12) test device (13) of side a and b is big with test slave respectively as test main frame and test slave, test main frame The negative pole of the controllable DC current source module of power is respectively with the one end at close A ends in the rail (17) of section to be measured and close to B The positive pole of the high-power controllable DC current source module of one end connection at end, test main frame and test slave contacts with descending respectively The side a and b connection of net (12)；Pass through the high-power controllable downward row contact net (12) of DC current source module in test main frame Injection Current, meanwhile, the electric current I that the data collecting module collected test main frame in test main frame is injected into contact net2, it is descending Potential difference U between contact net (12) and rail (17)21；Meanwhile control instruction is sent to test slave by test main frame, Slave is tested after the instruction is received, the descending contact net of data collecting module collected (12) and the rail (17) tested in slave Between potential difference U22；After collection terminates, data measured is uploaded to test main frame by test slave；S4:Test main frame carries out the calculating of longitudinal electrical resistance using the data received, while result of calculation is shown and deposited Storage.
- 5. a kind of urban track traffic track longitudinal electrical resistance method of testing according to claim 4, it is characterised in that described The computational methods of longitudinal electrical resistance include accepting step in S4：Step 1：Using the test data in S2, contact net longitudinal electrical resistance R is obtained by formula (1)cw；<mrow> <msub> <mi>R</mi> <mrow> <mi>c</mi> <mi>w</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>U</mi> <mn>11</mn> </msub> <mo>-</mo> <msub> <mi>U</mi> <mn>12</mn> </msub> </mrow> <mrow> <mn>2</mn> <msub> <mi>L</mi> <mn>1</mn> </msub> <mo>&times;</mo> <msub> <mi>I</mi> <mn>1</mn> </msub> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Wherein, L in formula1For the distance between contact net side a and b；Step 2：Using the test data in S3, the longitudinal electrical resistance R of track is obtained by formula (2)gd；<mrow> <msub> <mi>R</mi> <mrow> <mi>g</mi> <mi>d</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mn>1</mn> <mrow> <mn>2</mn> <msub> <mi>L</mi> <mn>2</mn> </msub> </mrow> </mfrac> <mo>&lsqb;</mo> <mfrac> <mrow> <msub> <mi>U</mi> <mn>21</mn> </msub> <mo>-</mo> <msub> <mi>U</mi> <mn>22</mn> </msub> </mrow> <msub> <mi>I</mi> <mn>2</mn> </msub> </mfrac> <mo>-</mo> <msub> <mi>R</mi> <mrow> <mi>c</mi> <mi>w</mi> </mrow> </msub> <msub> <mi>L</mi> <mn>2</mn> </msub> <mo>&rsqb;</mo> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Wherein, L in formula2For the length of rail section to be measured.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711183192.4A CN107765098B (en) | 2017-11-23 | 2017-11-23 | Device and method for testing longitudinal resistance of urban rail transit rail |
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|---|---|---|---|
| CN201711183192.4A CN107765098B (en) | 2017-11-23 | 2017-11-23 | Device and method for testing longitudinal resistance of urban rail transit rail |
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| CN110658388A (en) * | 2019-10-11 | 2020-01-07 | 中国铁道科学研究院集团有限公司通信信号研究所 | Detection method and device for ground resistance and electronic equipment |
| CN113533856A (en) * | 2021-07-12 | 2021-10-22 | 安科工程技术研究院（北京）有限公司 | Device and method for testing ground conductivity of rail |
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| CN113533856B (en) * | 2021-07-12 | 2024-03-19 | 安科工程技术研究院（北京）有限公司 | Device and method for testing ground conductivity of track |
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| Publication number | Publication date |
|---|---|
| CN107765098B (en) | 2023-09-22 |
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