CN212723094U - True effective value track insulation resistance measuring device - Google Patents
True effective value track insulation resistance measuring device Download PDFInfo
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- CN212723094U CN212723094U CN202021511896.7U CN202021511896U CN212723094U CN 212723094 U CN212723094 U CN 212723094U CN 202021511896 U CN202021511896 U CN 202021511896U CN 212723094 U CN212723094 U CN 212723094U
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- 238000009413 insulation Methods 0.000 title claims abstract description 61
- 238000005259 measurement Methods 0.000 claims abstract description 31
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of resistance measurement equipment, a true effective value track insulation resistance measuring device is disclosed, the inside current generator that is provided with of tester local, voltage measurement module and current measurement module, current generator is provided with alternating current signal generator, voltage amplitude regulator and voltage current converter, voltage measurement module and current measurement module are provided with voltage amplifier, band pass filter and AD sample thief respectively, current generator, voltage measurement module and current measurement module are connected with the CPU electricity through interconnecting link respectively, current measurement module's input is connected with current sensor through the wire electricity; the tester is internally fixed with a rechargeable lithium battery. The utility model discloses introduce in track insulation resistance's detection, can survey the online real effective insulation resistance of rail rapidly, accurately, to data function such as save, analysis, early warning, provide the guarantee for operation safety.
Description
Technical Field
The utility model belongs to the technical field of resistance measurement equipment, especially, relate to a true effective value track insulation resistance measuring device.
Background
At present: most of the driving faults of the electric system are caused by turnout and track circuit, and most of the track circuit faults are caused by insulation damage, track bed leakage (track circuit impedance is reduced), and poor contact of plug pin connecting wires.
In the routine maintenance work of railway signal equipment, the insulation performance of the track needs to be judged. In the measurement process of the insulation resistance of the railway track circuit, the traditional measurement is difficult because the track circuit has traction current and multi-information transmission. At present, the insulation quality of track insulation equipment at two ends of track insulation and the insulation quality of the track insulation are approximately judged mainly by measuring track voltage (a comparison method), a universal meter or a megger cannot be used for direct online measurement, and the insulation damage condition is estimated.
The damage such as track insulation festival arouses track signal trouble, seriously influences railway safety, and present track insulation resistance on-line measuring technique does: voltage signals with certain frequency and amplitude are added at two ends of the insulation section, equivalent resistance (including insulation section equivalent resistance) of the track circuit is calculated through equivalent calculation, when the resistance is low to a certain degree, namely the insulation section is considered to be damaged, because the ground resistance and other bypass resistances are calculated, the track circuit is not correct in principle, the equivalent resistance at the two ends of the insulation section is not measured, the track circuit measures the parallel resistance value of the resistance of the earth and the resistance of the insulation section, the effective resistance of the insulation section is not measured, and the error rate is very high from the practical use condition. The insulation resistance obtained by the existing measurement method is not the real insulation resistance of the insulation joint, and due to the influence of the environment and weather on the ground resistance, the error of the measurement result is very large, and the error of the actual insulation joint resistance is larger. The test result can not provide effective data support for the maintenance of the track circuit, and misjudgment is very easy, so that the waste of manpower and material resources is caused, and railway operation safety accidents are serious and even happen. Therefore, an on-line tester for track insulation resistance with a true effective value needs to be researched.
Through the above analysis, the problems and defects of the prior art are as follows:
the existing test mode of the track insulation resistance cannot measure the effective resistance of the insulation section, is easily influenced by the external environment, has large error, cannot provide effective data support for maintenance of a track circuit, easily causes waste of manpower and material resources, and even seriously causes railway operation safety accidents.
The difficulty in solving the above problems and defects is:
how to accurately measure the current signal actually passing through the insulation joint on line.
The significance of solving the problems and the defects is as follows:
the technical problem is solved, and the equivalent resistance of the insulation joint can be measured quickly and accurately. And the method for judging the quality of the track insulation characteristics is an effective method for predicting the occurrence of faults in advance and eliminating the hidden fault danger in advance. The method provides an effective detection means for accurately judging the insulation quality of the insulation section for the railway electric service department and the engineering department, and provides guarantee for the operation safety of the railway.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a true effective value track insulation resistance measuring device.
The utility model discloses a realize like this, a true effective value track insulation resistance measuring device is provided with:
a tester local;
the tester host is internally provided with a CPU, a special frequency current signal generator, a voltage measuring module and a current measuring module, the current signal generator, the voltage measuring module and the current measuring module are respectively and electrically connected with the CPU through connecting lines, and the input end of the current measuring module is electrically connected with a current sensor through a lead;
the tester local is internally fixed with a rechargeable lithium battery, and the outer side of the tester local is embedded with a liquid crystal screen and a keyboard.
Further, the current signal generator is provided with an alternating current signal generator, a voltage amplitude regulator and a voltage-current converter.
Further, the voltage measurement module and the current measurement module are respectively provided with a voltage amplifier, a band-pass filter and an AD sampler.
Furthermore, a current output meter pen seat, a voltage measurement meter pen seat and a current measurement meter pen seat are embedded on the outer side of the tester, the current output end of the current signal generator is electrically connected with the current output meter pen seat, the measurement end of the voltage measurement module is electrically connected with the voltage measurement meter pen seat, and the measurement end of the current measurement module is electrically connected with the current measurement meter pen seat.
Further, the current sensor is a current clamp or a rogowski coil.
Combine foretell all technical scheme, the utility model discloses the advantage that possesses and positive effect are:
the utility model discloses simple structure, convenient operation need not to measure under specific environment or condition. The method is introduced in the detection of the insulation resistance of the rail, and can quickly and accurately measure the on-line insulation real resistance of the steel rail. The maintenance personnel obtain the true value of the insulation resistance in real time by measuring the insulation resistance on line on site, judge the quality of the insulation characteristic of the track in time and immediately make a processing result according to the test result. The tester is an effective method for predicting occurrence of faults in advance and eliminating hidden faults in advance. The method provides an effective detection means for accurately judging the insulation quality of the insulation section for the railway electric service department and the engineering department, and provides guarantee for the operation safety of the railway.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a true effective value track insulation resistance measuring device according to an embodiment of the present invention;
in the figure: 1. a current output meter pen holder; 2. a keyboard; 3. a liquid crystal screen; 4. a voltage measuring meter pen seat; 5. a current measuring meter pen stand; 6. a first steel rail; 7. an insulating section; 8. a current sensor; 9. a second steel rail; 10. a meter pen; 11. the tester is a local machine.
Fig. 2 is a schematic block diagram of a true effective value track insulation resistance measuring device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a current signal generator according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of current measurement provided by the embodiment of the present invention.
Fig. 5 is a schematic diagram of voltage measurement provided by the embodiment of the present invention.
Fig. 6 is a circuit diagram of a voltage and current measuring module according to an embodiment of the present invention.
Fig. 7 is a circuit diagram of a CPU according to an embodiment of the present invention.
Fig. 8 is a circuit diagram of a current signal generator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
To the problem that prior art exists, the utility model provides a true effective value track insulation resistance measuring device, it is right to combine below attached drawing 1 to 8 the utility model discloses do detailed description.
As shown in fig. 1, the embodiment of the utility model provides a true effective value track insulation resistance measuring device openly inlays and is equipped with LCD screen 3 and keyboard 2 at tester local 11, and tester local 11 openly upper end inlays and is equipped with voltage measurement meter pen stand 4, current measurement meter pen stand 5, and tester local 11 openly lower extreme inlays and is equipped with current output meter pen stand 1. The current output meter pen seat 1, the voltage measuring meter pen seat 4 and the current measuring meter pen seat 5 are respectively connected with a meter pen 10 through connecting lines.
The tester host 11 is internally provided with a CPU, a special frequency current signal generator, a voltage measuring module and a current measuring module, the current signal generator, the voltage measuring module and the current measuring module are respectively electrically connected with the CPU through connecting lines, and the input end of the current measuring module is electrically connected with a current sensor through a lead. The tester is internally fixed with a rechargeable lithium battery. The current output end of the current signal generator is electrically connected with the current output meter pen holder, the measuring end of the voltage measuring module is electrically connected with the voltage measuring meter pen holder, and the measuring end of the current measuring module is electrically connected with the current measuring meter pen holder.
The current signal generator is provided with an alternating current signal generator, a voltage amplitude regulator and a voltage-current converter. The voltage measuring module and the current measuring module are respectively provided with a voltage amplifier, a band-pass filter and an AD sampler.
The utility model discloses when measuring insulation resistance to rail insulation festival 7, at first plug socket to tester corresponding pen- shape metre seat 1, 4, 5 with pen-shape metre 10 and current sensor 8, then, encircle to press from both sides current sensor 8 on rail insulation festival 7, overlap joint the pen-shape metre 10 of current signal generator respectively in first rail 6, second rail 9 ((r) department), with voltage measurement pen-shape metre 10 overlap joint ((r) department) of first rail 6, second rail 9 simultaneously, measure and prepare to accomplish.
The power supply of the tester is turned on, the signal generator generates 200kHz voltage alternating current signals under the control of the CPU, the voltage amplitude regulator regulates the voltage amplitude, and a voltage-current converter generates current signals with certain amplitude. The current amplitude is too large, which affects the safety of track signals, and is too small, which is not beneficial to the measurement of insulation resistance. The current signal is transmitted to the current output meter pen holder through the output terminal, and the meter pen inserted outside the instrument applies the current signal to the first steel rail 6 and the second steel rail 9. At the moment, one part of the generated current passes through the track circuit and the ground to form a loop, the other part of the generated current passes through the track insulating joint 7, and leakage current is formed inside the insulating joint 7 between the first steel rail 6 and the second steel rail 9 and has no relation with the leakage current of the ground resistor, so that the accuracy and the authenticity of measuring the resistance of the insulating joint are ensured.
The voltage between the points III and IV of the first steel rail 6 and the second steel rail 9 is measured by a measuring meter pen 10 of the voltage measuring module, the voltage is amplified by the voltage measuring meter pen seat 4 to the voltage measuring module, and then the signal is transmitted to the CPU through the band-pass filter and the AD sampler.
A current sensor 8 (a current clamp or a Rockwell coil) clamped on the insulating joint 7 is electrically connected to the current measuring meter pen seat 5 through a lead, the leakage current inside the insulating joint 7 is measured in an induction mode, the induced signal is subjected to voltage amplification (integral amplification is added if the Rockwell coil is adopted), then the induced signal is sampled through a band-pass filter and an AD (analog-to-digital) and finally transmitted to a CPU (Central processing Unit).
The CPU receives the measured voltage and current signals, calculates to obtain the true effective insulation resistance of the insulation joint 7, and displays the true effective insulation resistance on the liquid crystal screen 3. At the same time, the test data and information related thereto are automatically stored within the tester to facilitate querying historical data and deriving test data on the tester.
The tester is provided with a liquid crystal screen 3 for display, the liquid crystal screen 3 is electrically connected with the CPU, and relevant information such as an operator, a workshop section, a work area, a test point and the like can be input and displayed. And the test result is displayed on the liquid crystal screen in real time.
The keyboard 2 is electrically connected to the CPU and can perform information input operations and function option operations.
The embodiment of the utility model provides an adopt the power supply of large capacity rechargeable lithium cell, have the electric quantity suggestion, can satisfy the requirement of outdoor use completely. The instrument has a data storage function, historical data can be inquired on the instrument, and data can be exported to a computer for data management.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention by those skilled in the art within the technical scope of the present invention.
Claims (5)
1. The utility model provides a true effective value track insulation resistance measuring device which characterized in that, true effective value track insulation resistance measuring device is provided with:
a tester local;
the tester is characterized in that a CPU, a current signal generator, a voltage measuring module and a current measuring module are arranged in the tester, the current signal generator, the voltage measuring module and the current measuring module are respectively and electrically connected with the CPU through connecting lines, and the input end of the current measuring module is electrically connected with a current sensor through a lead;
the tester local is internally fixed with a rechargeable lithium battery, and the outer side of the tester local is embedded with a liquid crystal screen and a keyboard.
2. The true virtual value rail insulation resistance measurement device according to claim 1, wherein the current signal generator is provided with an alternating current signal generator, a voltage amplitude regulator, and a voltage-to-current converter.
3. The true-significand track insulation resistance measuring apparatus according to claim 1, wherein the voltage measuring module and the current measuring module are provided with a voltage amplifier, a band-pass filter, and an AD sampler, respectively.
4. The insulation resistance measuring device of a true effective value track according to claim 1, wherein a current output meter pen holder, a voltage measuring meter pen holder and a current measuring meter pen holder are embedded outside the tester, the current output end of the current signal generator is electrically connected with the current output meter pen holder, the measuring end of the voltage measuring module is electrically connected with the voltage measuring meter pen holder, and the measuring end of the current measuring module is electrically connected with the current measuring meter pen holder.
5. The true virtual value rail insulation resistance measurement device of claim 1, wherein the current sensor is a current clamp or a rogowski coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021511896.7U CN212723094U (en) | 2020-07-27 | 2020-07-27 | True effective value track insulation resistance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021511896.7U CN212723094U (en) | 2020-07-27 | 2020-07-27 | True effective value track insulation resistance measuring device |
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| CN212723094U true CN212723094U (en) | 2021-03-16 |
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| CN202021511896.7U Active CN212723094U (en) | 2020-07-27 | 2020-07-27 | True effective value track insulation resistance measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062875A (en) * | 2021-11-18 | 2022-02-18 | 株洲时代新材料科技股份有限公司 | Device and method for testing impedance characteristics of rail insulation and parts thereof |
| CN116068277A (en) * | 2023-03-06 | 2023-05-05 | 北京全路通信信号研究设计院集团有限公司 | Insulation resistance testing device and method for mechanical insulation joint in station |
-
2020
- 2020-07-27 CN CN202021511896.7U patent/CN212723094U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062875A (en) * | 2021-11-18 | 2022-02-18 | 株洲时代新材料科技股份有限公司 | Device and method for testing impedance characteristics of rail insulation and parts thereof |
| CN116068277A (en) * | 2023-03-06 | 2023-05-05 | 北京全路通信信号研究设计院集团有限公司 | Insulation resistance testing device and method for mechanical insulation joint in station |
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