CN209086324U - A kind of portable high-pressure test open type DC microammeter - Google Patents
A kind of portable high-pressure test open type DC microammeter Download PDFInfo
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- CN209086324U CN209086324U CN201821756727.2U CN201821756727U CN209086324U CN 209086324 U CN209086324 U CN 209086324U CN 201821756727 U CN201821756727 U CN 201821756727U CN 209086324 U CN209086324 U CN 209086324U
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 11
- 230000009466 transformation Effects 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
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- 238000004422 calculation algorithm Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
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Abstract
The utility model relates to the DC experiment technical fields of high pressure more piece arrester equipment, specifically provide a kind of portable high-pressure test open type DC microammeter, including DC measurement sensor and measurement handheld device, DC measurement sensor includes sensor housing, battery A and sequentially connected opening Hall transformer, signal amplification module, central processing unit A, voltage transformation module, signal output terminal；Measurement handheld device includes handheld device shell and signal input terminal, external signal input pcb terminal, signal acquisition and conditioning module, central processing unit B, liquid crystal display, data memory module, battery B, the utility model is not in the case where removing arrester primary line, the DC current values that test product is applied can accurately be measured, greatly promote micro amps DC measurement accuracy, the technical problem of DC reference test can not be carried out in the case where primary line is not removed by solving 220kV and the above arrester for a long time.
Description
Technical field
The utility model relates to the DC experiment technical fields of high pressure more piece arrester equipment, specifically provide a kind of portable
Formula high-potting open type DC microammeter is realized in the case where arrester does not remove primary line, completes entire DC experiment
Project.Sensor of this patent based on opening Hall transformer, meets the parameter request of arrester DC reference test, ties simultaneously
The measuring technique of DC current is closed, realizes that the DC current of microampere order under high pressure occasion accurately measures, and pass through liquid crystal display
Screen shows data result.
Background technique
Currently, arrester DC reference voltage test be assess lightning arrester body operating status most effective means it
One, therefore the arrester of substation operation requires to carry out this routine test.66kV arrester belongs to single-unit arrester structure,
Primary line can not be torn open in the test of customary DC reference voltage and is directly carried out, and can be obtained by the DC ammeter of lower part
Relevant DC measurement parameter saves largely manually, and test efficiency is higher.But since 220kV arrester is two nodules
Structure, if otherwise take out stitches and carry out DC reference voltage test, it allows for accurately measuring and be flowed through in arrester cable
The DC current values of application, however since its position is higher, safe distance is short, can measure the DC current sensor of microampere order
The more low reason of precision, causes to be unable to measure DC current values always for many years, this problem is not torn open as 220kV arrester is carried out
Line does a maximum bottleneck of DC reference test.As the quantity of 200kV arrester is increasing, dismount during the test
Primary line consumes a large amount of manpower and material resources, and test efficiency is extremely low.If realization does not remove primary line and carries out DC experiment, first
It is to solve under high-altitude, high pressure occasion, the precise measurement of direct current microampere order electric current.This patent has developed to solve this problem
Portable high-pressure tests open type DC microammeter.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of portable high-pressure test open type direct current microampere
Table can accurately measure the DC current values that test product is applied, by iron in the case where not removing arrester primary line
Research in terms of magnetic material and signal processing greatly promotes micro amps DC measurement accuracy, solves 220kV or more and keeps away
Thunder device can not carry out the technical problem of DC reference test in the case where primary line is not removed for a long time.
The utility model is realized in this way a kind of portable high-pressure tests open type DC microammeter, including direct current is surveyed
Quantity sensor and measurement handheld device, DC measurement sensor includes sensor housing, battery A and sequentially connected opening Hall
Mutual inductor, signal amplification module, central processing unit A, voltage transformation module, signal output terminal, opening Hall transformer are fixed
In sensor housing upper end, battery A is connect with each electricity consumption module of DC measurement sensor；
Measuring handheld device includes the signal input terminal of handheld device shell and handheld device enclosure interior, external signal
Input pcb terminal, signal acquisition and conditioning module, central processing unit B, liquid crystal display, data memory module, battery B, signal
Input terminal is connect with external signal input pcb terminal, and external signal inputs the acquisition of pcb terminal connection signal and conditioning module,
Signal acquisition connect central processing unit B with conditioning module, and central processing unit B is separately connected liquid crystal display and data storage mould
Block, battery B are connect with each electricity consumption module of measurement handheld device；The signal output terminal is connect with signal input terminal.
Further, the opening Hall transformer forms forcipated mutual-inductor by two semicircular Hall element docking,
And setting sensor openings switch, sensor openings switch is connect with the end of a Hall element, and opening Hall is realized in pressing
The opening of mutual inductor.
It further, further include insulating bar, the route that the signal output terminal is connect with signal input terminal is wrapped in
On insulating bar.
Further, the voltage signal of the DC measurement sensor output is 0-100mV；The central processing unit B turns
The electric current changed is 0-1000mAdc.
Compared with the prior art, the advantages of the utility model are: 1. being done in DC reference voltage test in arrester, grind
Produce the measuring device that can accurately measure the DC current values once applied, realize do not remove primary line can be completed it is whole
A pilot project；2. open type high voltage direct current sensor is devised, it, can be by insulating bar biography in cable of arrester
Sensor is put into and removes, the convenient test for carrying out DC current.3. under high pressure occasion, the measurement difficulty of small DC current
Very big, the high pressure occasion Anti-Jamming Technique and signal processing technology of this patent research can be accurate using opening Hall transformer
Measure direct current signal small in primary line.4. the handheld device developed can be docked by signal wire with sensor,
Show that measured current value, the electrical isolation problem between very good solution people and equipment improve the safety and work of test on the spot
Make efficiency.
Detailed description of the invention
With reference to the accompanying drawing and embodiment is described in further detail the utility model:
Fig. 1 is each component connection relationship diagram of the utility model DC measurement sensor；
Fig. 2 is that the utility model measures each component connection relationship diagram of handheld device upper housing；
Fig. 3 is that the utility model measures each component connection relationship diagram of handheld device lower case；
Fig. 4 is the utility model overall work status architecture schematic diagram；
Fig. 5 is that the utility model opening Hall transformer and sensor openings switch connection relationship diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to the accompanying drawing and implement
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is used only for explaining
The utility model is not used to limit the utility model.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, it is micro- that the utility model provides a kind of portable high-pressure test open type direct current
Pacify table, including DC measurement sensor and measurement handheld device, DC measurement sensor include sensor housing 1, battery A2 and
Sequentially connected opening Hall transformer 3, signal amplification module 4, central processing unit A5, voltage transformation module 6, signal output end
Son 7, opening Hall transformer 3 are fixed on 1 upper end of sensor housing, each electricity consumption module of battery A2 and DC measurement sensor
Connection；
Measurement handheld device includes signal input terminal 9 handheld device shell 8 and handheld device shell 8 inside, outside
Signal inputs pcb terminal 10, signal acquisition and conditioning module 11, central processing unit B12, liquid crystal display 13, data storage mould
Block 14, battery B15, signal input terminal 9, external signal input pcb terminal 10, signal acquisition and conditioning module 11, centre
Reason device B12 is sequentially connected with, and central processing unit B12 is separately connected liquid crystal display 13 and data memory module 14, battery B15 and survey
Measure each electricity consumption module connection of handheld device；The signal output terminal 7 is connect with signal input terminal 9.
In order to facilitate the Hall transformer that is open is opened and closed, as the improvement of technical solution, the Hall transformer 3 that is open by
Two semicircular Hall element docking composition forcipated mutual-inductors, and sensor openings switch 16 is set, sensor openings switch
16 connect with the end of a Hall element, and the opening of opening Hall transformer is realized in pressing.
It further include insulating bar 19 for operating easily, as the improvement of technical solution, signal output terminal 7 and signal are defeated
The route for entering the connection of terminal 9 is wrapped on insulating bar 19.Since this patent is not remove a conducting wire to realize current measurement,
Conducting wire is usually in 3 meters or more height, if so staff is installed to measurement sensor on conducting wire, it is necessary to be carried out with insulating bar
Auxiliary.
In the substation of 220kV and above, arrester 20 is multi-section structure (more than 2 sections), if otherwise
In the case where removing a cable, the DC experiment of arrester 20 then need accurately to measure apply in a cable it is small
DC current.When carrying out 20 DC experiment of arrester using the present apparatus, DC measurement sensor is opening sensor, belongs to punching
The current sensor of formula.Operator is easily inserted in DC measurement sensor from a cable 21, measures handheld device
The data as measured by wired mode reception DC measurement sensor, after being calculated analytically, show measurement numerical value,
Reach and is convenient for measuring, the purpose of electrical isolation and protection personal safety.
Sensor housing 1 is processed by engineering plastics, and opening Hall transformer 3 needs to apply DC voltage could work
Make, DC power supply has battery A2 offer.16 pairs of opening Hall transformers 3 of sensor openings switch operate, flexible to open
Be open Hall transformer 3, is conveniently inserted on a cable 21 and measures.Cable 21 passes through opening Hall transformer
3, the DC current that opening Hall transformer 3 incudes is converted by the conditioning of signal, is transformed into the current signal of 0~10mA, is mentioned
Signal amplification module 4 is supplied, signal amplification is carried out by it, is transformed into the simulation model that can be acquired by A/D.Signal amplification module
After the analog signal amplification transformation that 4 opening Hall transformers 3 export, enters in central processing unit A5, carries out A/D conversion,
After being converted into digital signal, by the calculation method of software filtering algorithm and Fast Fourier Transform, more accurate electricity is obtained
Flow measure.Central processing unit A5 is connect with voltage transformation module 6 by spi bus, and voltage transformation module 6 belongs to D/A transformation
Scope is digital quantity to be converted into analog quantity, and the voltage signal of DC measurement sensor output is 0~100mV, and effect is essence
The DC current values really measured are externally exported by being transformed into voltage signal, make the handheld device of docking receive it is effective,
The signal of strong antijamming capability and the remote transmission for realizing data.Signal output terminal 7 is to can connect the signal electricity with shielding
Cable makes noiseless harmonic wave in the voltage signal converted out, is completely transferred in handheld device.
Handheld device shell 8 is that ABS plastic is material, and is made of upper and lower two shells, has wear-resisting, heat resistance
Excellent advantage.Signal input terminal 9 connects signal shielding cable, receives 0~100mV's of the output of DC measurement sensor
D. c. voltage signal, signal input terminal 9 connects external signal and inputs pcb terminal 10, by signal acquisition and conditioning module 11
0~100mV of input by filtering and is improved, is entered in central processing unit B12,0~100mV is corresponded to direct current by processor
The measurement range of measurement sensor is adjusted to 0~1000mAdc, obtains the true value of DC measurement.Central processing unit B12 measurement
Data pass through I2C bus is transmitted in LCD MODULE from central processing unit B12, and is transferred to liquid crystal by data flat cable
On display screen 13, liquid crystal display 13 is connected with the connection of central processing unit B12 by 14 needle data flat cables.
Liquid crystal display cable terminal 22 is welded in PCB circuit board, itself has self-locking function, keeps wire plug connection secured.
100 groups of measurement data can store on a handheld device, be stored by data memory module 14, in device looses power, number
According to not losing, guarantee the inquiry of historical data.The power supply of entire handheld device has battery B15 completion, the charging lithium electricity of 4000mAh
Pond can be such that entire handheld device works normally 20 hours.
Claims (4)
1. a kind of portable high-pressure tests open type DC microammeter, which is characterized in that including DC measurement sensor and measurement
Handheld device, DC measurement sensor include that sensor housing, battery A and sequentially connected opening Hall transformer, signal are put
Big module, central processing unit A, voltage transformation module, signal output terminal, opening Hall transformer are fixed on sensor housing
End, battery A are connect with each electricity consumption module of DC measurement sensor；
Measurement handheld device includes the signal input terminal of handheld device shell and handheld device enclosure interior, external signal input
Pcb terminal, signal acquisition and conditioning module, central processing unit B, liquid crystal display, data memory module, battery B, signal input
Terminal is connect with external signal input pcb terminal, and external signal inputs the acquisition of pcb terminal connection signal and conditioning module, signal
Acquisition connect central processing unit B with conditioning module, and central processing unit B is separately connected liquid crystal display and data memory module, electricity
Pond B is connect with each electricity consumption module of measurement handheld device；The signal output terminal is connect with signal input terminal.
2. portable high-pressure described in accordance with the claim 1 tests open type DC microammeter, which is characterized in that the opening is suddenly
Your mutual inductor is docked by two semicircular Hall elements forms forcipated mutual-inductor, and sensor openings are arranged and switch, sensor
Opening switch is connect with the end of a Hall element, and the opening of opening Hall transformer is realized in pressing.
3. portable high-pressure described in accordance with the claim 1 tests open type DC microammeter, which is characterized in that further include insulation
Bar, the route that the signal output terminal is connect with signal input terminal are wrapped on insulating bar.
4. portable high-pressure described in accordance with the claim 1 tests open type DC microammeter, which is characterized in that the direct current is surveyed
The voltage signal of quantity sensor output is 0-100mV；The electric current that the central processing unit B has been converted is 0-1000mAdc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756727.2U CN209086324U (en) | 2018-10-29 | 2018-10-29 | A kind of portable high-pressure test open type DC microammeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756727.2U CN209086324U (en) | 2018-10-29 | 2018-10-29 | A kind of portable high-pressure test open type DC microammeter |
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| CN209086324U true CN209086324U (en) | 2019-07-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034916A (en) * | 2021-11-12 | 2022-02-11 | 国网辽宁省电力有限公司沈阳供电公司 | Wireless measuring device and system for microampere direct current |
-
2018
- 2018-10-29 CN CN201821756727.2U patent/CN209086324U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034916A (en) * | 2021-11-12 | 2022-02-11 | 国网辽宁省电力有限公司沈阳供电公司 | Wireless measuring device and system for microampere direct current |
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