CN207742259U - A kind of transmission line of electricity anti-interference direct current resistance test device - Google Patents
A kind of transmission line of electricity anti-interference direct current resistance test device Download PDFInfo
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- CN207742259U CN207742259U CN201721879800.0U CN201721879800U CN207742259U CN 207742259 U CN207742259 U CN 207742259U CN 201721879800 U CN201721879800 U CN 201721879800U CN 207742259 U CN207742259 U CN 207742259U
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Abstract
A kind of transmission line of electricity anti-interference direct current resistance test device of the utility model belongs to transmission line of electricity anti-interference direct current resistance test device technical field；Technical problem to be solved is：There is provided that a kind of anti-jamming effectiveness is good, safe to use, easy to operate, the accurate transmission line of electricity anti-interference direct current resistance test device of measurement data；Solve the technical solution that the technical problem uses for：First multiple selector is connected after being sequentially connected in series Voltage stabilizing module and rectification filtering module with supply line to be measured；The signal output end of central controller is connected with the first multiple selector and the second multiple selector respectively, measuring resistance comparing module is connected after concatenating the first analog-to-digital conversion module with the signal input part of central controller, and measured resistance measurement module is connected after concatenating the second analog-to-digital conversion module with the signal input part of central controller；The signal output end of first multiple selector is connected after being sequentially connected in series measuring resistance comparing module, the second multiple selector with the signal input part of measured resistance measurement module；The utility model is applied to measure the place of the D.C. resistance of supply line.
Description
Technical field
A kind of transmission line of electricity anti-interference direct current resistance test device of the utility model, belongs to the anti-interference direct current of transmission line of electricity
Hinder test device technical field.
Background technology
In recent years, with the development of power construction, joint using for power circuit is more and more with scissors crossing phenomenon, leads
The induced voltage for causing transmission line of electricity mutual increases, and serious threat is constituted to tester and power grid instrument and meter, meanwhile,
There are stronger interference in the parametric procedure of measurement circuit, and leading to measurement data, there are larger errors；Under the conditions of this, if
Using common electric bridge or digital direct current resistance meter, when measuring the D.C. resistance of circuit it is possible that electromagnetic induction
Voltage is more than the voltage of tester output port, measurement data can be caused large error occur in this way, instrument may be caused when serious
Device is damaged, and cannot reflect the true construction quality of transmission line of electricity；Current jamproof measuring apparatus, generally use alien frequencies power supply are surveyed
The method of examination, but for the accurate measurement compared with high induction voltage and the high-tension line D.C. resistance of electric current, there is no specific
Device may be implemented.
The D.C. resistance data for obtaining supply line are measured, are that and circuit can be gone out to check circuit crimp head quality
Existing failure provides data as location base, and the Main Basiss of evaluation line construction quality, due to test line and its
The factors such as the parallel lines on same tower of his supply line, parallel, scissors crossing, since the mutual inductance effect between circuit leads to tested dead line
Still there is higher electromagnetic induction voltage after being grounded at one end, summarize data by live a large amount of actual measurements, single-phase voltage-to-ground is most
Up to 200V or so when big, for voltage between phases up to 100V or so, this can cause DATA REASONING that can not carry out, it is therefore desirable to research and develop one
Kind transmission line of electricity anti-interference direct current resistance tester is used for solving the problems, such as this.
Utility model content
The utility model is to overcome the shortcomings of the prior art, technical problem to be solved to be：It provides a kind of anti-dry
Disturb that effect is good, safe to use, easy to operate, the accurate transmission line of electricity anti-interference direct current resistance test device of measurement data；For solution
Certainly above-mentioned technical problem, the technical solution adopted in the utility model are：A kind of transmission line of electricity anti-interference direct current resistance test device,
Including central controller, the first multiple selector, measuring resistance comparing module, the first analog-to-digital conversion module, the second multi-path choice
Device, measured resistance measurement module, the second analog-to-digital conversion module；
First multiple selector is sequentially connected in series after Voltage stabilizing module and rectification filtering module and supply line's phase to be measured
Even；
The signal output end of the central controller is connected with the first multiple selector and the second multiple selector respectively, institute
It states after measuring resistance comparing module concatenates the first analog-to-digital conversion module and is connected with the signal input part of central controller, it is described tested
Resistance measuring module is connected after concatenating the second analog-to-digital conversion module with the signal input part of central controller；
The signal output end of first multiple selector is sequentially connected in series measuring resistance comparing module, the second multiple selector
It is connected afterwards with the signal input part of measured resistance measurement module.
The central controller is also associated with LED display and keyboard.
The central controller is also associated with data communication module and data memory module.
The central controller, the first multiple selector, measuring resistance comparing module, the first analog-to-digital conversion module, second
Multiple selector, measured resistance measurement module, the second analog-to-digital conversion module, Voltage stabilizing module, rectification filtering module, data communicate mould
Block and data memory module are arranged inside hard plastic seal box, and the control in hard plastic seal box is arranged in the LED display and keyboard
Panel surface processed is attached by RS232 communication bus between each other.
What the utility model had compared with the existing technology has the beneficial effect that：The utility model by will control component and
Module is integrated in hard plastic seal box, simple in structure, small, light-weight easy to carry, using selector and measuring resistance pair
The D.C. resistance on institute's survey line road is acquired measurement, and is handled data by central controller, is finally calculated defeated
DC resistance inside electric line, and it will be shown on display screen, measurement data is accurate, time of measuring is short, anti-interference energy
Power is strong, and stability is good, and the utility model is additionally provided with serial data communication device, may be implemented to anti-interference DC line electricity
Hinder the intelligence measured.
Description of the drawings
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the structural schematic diagram of the utility model；
In figure：1 it is central controller, 2 be the first multiple selector, 3 be measuring resistance comparing module, 4 is the first modulus
Conversion module, 5 be the second multiple selector, 6 be measured resistance measurement module, 7 be the second analog-to-digital conversion module, 8 be voltage stabilizing mould
Block, 9 be rectification filtering module, 10 be supply line to be measured, 11 be LED display, 12 be keyboard, 13 be data communication mould
Block, 14 are data memory module.
Specific implementation mode
As shown in Figure 1, a kind of transmission line of electricity anti-interference direct current resistance test device of the utility model, including central controller
1, the first multiple selector 2, measuring resistance comparing module 3, the first analog-to-digital conversion module 4, the second multiple selector 5, tested electricity
Hinder measurement module 6, the second analog-to-digital conversion module 7；
First multiple selector 2 is sequentially connected in series after Voltage stabilizing module 8 and rectification filtering module 9 and supply line to be measured
10 are connected；
The signal output end of the central controller 1 respectively with 5 phase of the first multiple selector 2 and the second multiple selector
Even, the measuring resistance comparing module 3 is connected after concatenating the first analog-to-digital conversion module 4 with the signal input part of central controller 1,
The measured resistance measurement module 6 is connected after concatenating the second analog-to-digital conversion module 7 with the signal input part of central controller 1；
The signal output end of first multiple selector 2 is sequentially connected in series measuring resistance comparing module 3, the second multi-path choice
It is connected with the signal input part of measured resistance measurement module 6 after device 5.
The central controller 1 is also associated with LED display 11 and keyboard 12.
The central controller 1 is also associated with data communication module 13 and data memory module 14.
The central controller 1, the first multiple selector 2, measuring resistance comparing module 3, the first analog-to-digital conversion module 4,
Second multiple selector 5, measured resistance measurement module 6, the second analog-to-digital conversion module 7, Voltage stabilizing module 8, rectification filtering module 9,
Data communication module 13 and data memory module 14 are arranged inside hard plastic seal box, and the LED display 11 and keyboard 12 are set
It sets on the control panel surface of hard plastic seal box, is attached between each other by RS232 communication bus.
The utility model is positioned over there are in the environment of compared with strong electromagnetic induced voltage, can accurately measure circuit to be measured
The range of true DC resistance, anti-AC influence voltage can reach：The D.C. resistance range of 0-100V, measurement can reach
To 2m Ω -80 Ω, highest resolution reaches 1 μ Ω, in outside there are under 5-100V Hz noise voltages, error can reach ±
0.5 ± 5 word.
The core of the utility model is anti-interference ability, to each premised on reducing induced voltage and uncertain factor
Component and module are configured connection, use digital filtering and frequency analysis to be surveyed again to high-tension line D.C. resistance first
Amount, device only measure DC component, even if ensureing still accurately measure in the case of having alternating voltage superposition straight
Flow voltage value；For sample voltage value, harmonic analysis method may be used, DC component is obtained by Fourier transformation, filter out electromagnetism
Induced voltage, harmonic component and noise jamming voltage, strong antijamming capability, measurement data is accurate, and the data processing task is in
Controller 1 is entreated to complete.
When the utility model is used, 220V, 50Hz alternating current acquired from supply line 10 to be measured is filtered through over commutation
Wave module 9 obtains the direct current of 311V after carrying out full-wave rectification, filtering, and direct current exports 25V direct currents using Voltage stabilizing module 8
Electricity can be used as experimental voltage source, central controller 1 to be selected corresponding to test line by controlling the second multiple selector 5
Then phase calculates measured resistance value, further select standard electric resistance value appropriate by controlling the first multiple selector 2.
The voltage value of the output of the measuring resistance comparing module 3 and measured resistance measurement module 6 is through over-sampling and mould
Sampled result is sent to central controller 1 after number conversion, central controller 1 will be handled data, and result is shown
On LED display 11；32 high speed processors built in the central controller 1 have efficient data-handling capacity, can protect
Demonstrate,prove operational precision and arithmetic speed.
According to actual needs, the peripheral module for having multiple functions can be targetedly arranged in the utility model, and the LED is aobvious
Display screen 11 can show the D.C. resistance data measured, can be operated current state to realize by keyboard 12
Corresponding function, the utility model can by treated, data remote transmission gives monitoring center to calculate by data communication module 13
Machine makes higher level's monitoring personnel understand in real time and measures situation, and before transmitting, the data of measurement processing can temporarily be deposited in data
In memory module 14, in case transferring at any time.
The purpose of development of the utility model is the tradition in order to solve electromagnetic induction voltage interference problem and make functional diversities
D.C. resistance test device by filter capacitor due to realizing that equipment volume is big, and weight is heavy, and safety coefficient is low, and p-wire is more
And it is miscellaneous, and have a single function, data preserve trouble；The utility model by setting integrate cabinet meet it is small, light-weight, just
The features such as carrying, be user-friendly for operation；Whole device is arranged inside using high intensity, high insulation, wear-resisting hard plastic seal box, tool
There is good appearance, sturdy and durable, shockproof properties are good, and the class of insulation is high, the features such as facilitating onsite moving；The volume of measuring device and
Weight depends primarily on the size and weight of hardware circuit and power module, in actual use, it is also contemplated that power module dissipates
Power supply, control system, sampling apparatus in device can be made of one by heat space, and p-wire is individually separated.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (4)
1. a kind of transmission line of electricity anti-interference direct current resistance test device, it is characterised in that：Including central controller（1）, more than first
Road selector（2）, measuring resistance comparing module（3）, the first analog-to-digital conversion module（4）, the second multiple selector（5）, tested electricity
Hinder measurement module（6）, the second analog-to-digital conversion module（7）；
First multiple selector（2）It is sequentially connected in series Voltage stabilizing module（8）And rectification filtering module（9）Afterwards with supply lines to be measured
Road（10）It is connected；
The central controller（1）Signal output end respectively with the first multiple selector（2）With the second multiple selector（5）Phase
Even, the measuring resistance comparing module（3）Concatenate the first analog-to-digital conversion module（4）Afterwards with central controller（1）Signal input
End is connected, the measured resistance measurement module（6）Concatenate the second analog-to-digital conversion module（7）Afterwards with central controller（1）Signal
Input terminal is connected；
First multiple selector（2）Signal output end be sequentially connected in series measuring resistance comparing module（3）, the second multi-path choice
Device（5）Afterwards with measured resistance measurement module（6）Signal input part be connected.
2. a kind of transmission line of electricity anti-interference direct current resistance test device according to claim 1, it is characterised in that：The center
Controller（1）It is also associated with LED display（11）And keyboard（12）.
3. a kind of transmission line of electricity anti-interference direct current resistance test device according to claim 2, it is characterised in that：The center
Controller（1）It is also associated with data communication module（13）And data memory module（14）.
4. a kind of transmission line of electricity anti-interference direct current resistance test device according to claim 3, it is characterised in that：The center
Controller（1）, the first multiple selector（2）, measuring resistance comparing module（3）, the first analog-to-digital conversion module（4）, the second multichannel
Selector（5）, measured resistance measurement module（6）, the second analog-to-digital conversion module（7）, Voltage stabilizing module（8）, rectification filtering module
（9）, data communication module（13）And data memory module（14）It is arranged inside hard plastic seal box, the LED display（11）
And keyboard（12）It is arranged on the control panel surface of hard plastic seal box, is attached between each other by RS232 communication bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879800.0U CN207742259U (en) | 2017-12-28 | 2017-12-28 | A kind of transmission line of electricity anti-interference direct current resistance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721879800.0U CN207742259U (en) | 2017-12-28 | 2017-12-28 | A kind of transmission line of electricity anti-interference direct current resistance test device |
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| CN207742259U true CN207742259U (en) | 2018-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884624A (en) * | 2017-12-28 | 2018-04-06 | 国家电网公司 | Transmission line of electricity anti-interference direct current resistance test device |
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2017
- 2017-12-28 CN CN201721879800.0U patent/CN207742259U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884624A (en) * | 2017-12-28 | 2018-04-06 | 国家电网公司 | Transmission line of electricity anti-interference direct current resistance test device |
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