CN108896881A - A kind of tip pulse detection system - Google Patents
A kind of tip pulse detection system Download PDFInfo
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- CN108896881A CN108896881A CN201810650344.5A CN201810650344A CN108896881A CN 108896881 A CN108896881 A CN 108896881A CN 201810650344 A CN201810650344 A CN 201810650344A CN 108896881 A CN108896881 A CN 108896881A
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- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 230000003321 amplification Effects 0.000 claims description 18
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 18
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000005194 fractionation Methods 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000000825 ultraviolet detection Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Tip pulse detection system provided by the invention, including photoelectric conversion module, analog module, digital circuit blocks, host computer and power supply interface module.Tip pulse detection system provided by the invention has strong antijamming capability, compact, realizes the point discharge identification and orientation detection adjusted the distance in 0.5 meter of hemi-sphere range of detector.
Description
Technical field
The present invention relates to ultraviolet light photo sensor technical field, in particular to a kind of tip pulse detection system.
Background technique
Shelf depreciation is the phenomenon that high voltage electric field makes air ionization and discharges, and is the early stage sign of equipment fault.High-voltage electricity
It is hidden safely that the partial discharge phenomenon that apparatus insulated place occurs in Force system will cause equipment damage, the energy and economic loss, system
A variety of consequences such as trouble.Wherein, high-tension switch cabinet, ring network cabinet cable branch box and GIS device (gas-insulated combined electric equipment)
Etc. high-tension electricity equipment be the equipment of partial discharge phenomenon usually occur.Insulation position shelf depreciation can generate corrosive substance
Such as ozone and nitrogen oxides, nitric acid can be discharged under high- humility state, can accelerate the corrosion of insulated part, and then is enhanced part and put
The intensity of electricity.Therefore to the real-time monitoring of shelf depreciation, the security risk of high-tension electricity equipment can be found early, ensure electric power
The safety and steady of system is run.
Mainly have applied to the detection method of partial discharge monitoring at present：Supercritical ultrasonics technology (AE), superfrequency method (UHF) and
Ultraviolet detection method.Supercritical ultrasonics technology is the ultrasonic pulse detected in shelf depreciation, can be realized shelf depreciation diagnosis and discharge source
Accurate positionin.But supercritical ultrasonics technology will just be able to achieve the positioning to discharge position using multiple sensors composition array, and because of sound
Wave propagation characteristic, the influence vulnerable to mechanical oscillation.The high-frequency electromagnetic spoke that the measurement object of superfrequency method generates when being shelf depreciation
It penetrates.Application effect of the superfrequency method in GIS device is best, has been the detection technique generallyd use in the world to GIS device.It is special
Influence of the high-frequency method superfrequency method vulnerable to other electromagnetic interference signals in environment, and it is at high cost.
The measurement object of uv detection method is the ultraviolet composition of radiation spectrum in shelf depreciation.Relative to supercritical ultrasonics technology and spy
High-frequency method, ultraviolet monitoring method have principle it is simple and effective, not by environment electromagnetics interference, high sensitivity, the advantages such as can early diagnose.
The main detector for being applied to ultraviolet detection at present has：Photomultiplier tube, Si-based photodetectors etc..Photomultiplier tube tool
There are higher sensitivity and fast response time.But the photomultiplier transit pipe volume of Vacuum Package is larger, vulnerable to electromagnetic interference, when work
Large power supply and cathode is needed to freeze.Silicon based opto-electronics sensor responds visible light wave range, can to ultraviolet band and insensitive
It is light-exposed to inhibit relatively low.
Summary of the invention
The embodiment of the invention provides a kind of tip pulse detection systems, solve the acquisition of shelf depreciation ultraviolet signal, letter
Number processing, Discharge pulse waveform show, discharge source direction deciding the technical issues of.
The present invention provides a kind of tip pulse detection system, including photoelectric conversion module, analog module, digital circuit
Module, host computer and power supply interface module, wherein
The collected optical signal of corona discharge is converted to electric signal by the photoelectric conversion module, and the electric signal is passed through
I/V is converted to analog signal；
The analog module carries out multistage amplification to the analog signal, so that the analog signal meets modulus and turns
Change needs；
The digital circuit blocks carry out analog-to-digital conversion to the amplified analog signal and threshold filter obtains multi-pass
Signal code stream is sent to the host computer to after multi channel signals progress data encoding by road signal；
The host computer carries out reading data to the signal code stream, data frame is split, output waveform and exports orientation and sentences
Determine result.
As a kind of optional scheme, the photoelectric conversion module includes SiC silicon carbide Ultraviolet sensor and I/V conversion
Unit, the silicon carbide Ultraviolet sensor is used for the ultraviolet signal in acquisition shelf depreciation generation and generates electric signal, described
The electric signal is converted to analog signal output to analog module by I/V conversion module.
As a kind of optional scheme, the multistage is enlarged into second level amplification, and the analog module includes preceding storing
Big circuit and second amplifying circuit, the pre-amplification circuit export after carrying out preposition amplification to the analog signal to described two
Grade amplifying circuit, the second amplifying circuit export after carrying out secondary amplification to analog signal to the digital circuit blocks.
As a kind of optional scheme, the digital circuit blocks include A/D converting unit, threshold filter unit and number
According to coding Dispatching Unit, the A/D converting unit carries out analog-to-digital conversion to the analog signal and obtains digital signal, the threshold value
Filter unit carries out threshold filter to the digital signal and obtains four-way signal, and the data encoding Dispatching Unit is to described four
Channel signal carries out data encoding, and signal code stream is sent to the host computer by serial ports.
As a kind of optional scheme, the host computer has an identification positioning software, the identification positioning software to comprising
The signal code stream of pulse information decodes, and is converted into waveform image and exports in real time, utilizes the output of detector different directions amplitude
Difference determines the azimuth information in point discharge source and exports in real time.
It further include power module as a kind of optional scheme, for alternating current to be converted to operating voltage as system work
It is powered.
As a kind of optional scheme, the supply voltage of the power module includes ± 5V, 3.3V, 1.8V.
As a kind of optional scheme, the test surface of the detector include upper and lower, left and right, upper left, lower-left, upper right,
The orientation of bottom right eight.
As a kind of optional scheme, the central processing unit of the analog module uses FPGA module.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages that：
Tip pulse detection system provided by the invention, including photoelectric conversion module, analog module, digital circuit mould
Block, host computer and power supply interface module, wherein the photoelectric conversion module is converted to the collected optical signal of corona discharge
The electric signal is converted to analog signal by I/V by electric signal；The analog module carries out the analog signal more
Grade amplification, so that the analog signal meets analog-to-digital conversion needs；The digital circuit blocks believe the amplified simulation
Number carrying out analog-to-digital conversion and threshold filter obtains multi channel signals, carries out after data encoding the multi channel signals by signal code
Stream is sent to the host computer；The host computer carries out reading data, data frame fractionation, output waveform simultaneously to the signal code stream
Direction deciding is exported as a result, not only completing the detection of point discharge, is able to record lower Discharge pulse waveform, moreover it is possible to pass through pulse
Amplitude determines discharge source orientation.With strong antijamming capability, compact, realization is adjusted the distance in 0.5 meter of hemi-sphere range of detector
Point discharge identification and orientation detection.
Detailed description of the invention
Fig. 1 is the structural block diagram of the tip pulse detection system provided in the embodiment of the present invention；
Fig. 2 is the schematic diagram of detector test surface in the tip pulse detection system provided in the embodiment of the present invention；
Fig. 3 is the interfacial effect figure that positioning software is identified in the tip pulse detection system provided in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Description and claims of this specification and term " first ", " second ", " third ", " in above-mentioned attached drawing
Four " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein or describing
Sequence other than appearance is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that covering is non-exclusive
Include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to clearly arrange
Those of out step or unit, but may include be not clearly listed or it is solid for these process, methods, product or equipment
The other step or units having.
As shown in connection with fig. 1, the present invention provides a kind of tip pulse detection system, including photoelectric conversion module, analog circuit
Module, digital circuit blocks, host computer and power supply interface module, wherein the photoelectric conversion module acquires corona discharge
To optical signal be converted to electric signal, the electric signal is converted into analog signal by I/V；The analog module is to institute
It states analog signal and carries out multistage amplification, so that the analog signal meets analog-to-digital conversion needs；The digital circuit blocks are to putting
The analog signal after big carries out analog-to-digital conversion and threshold filter obtains multi channel signals, counts to the multi channel signals
Signal code stream is sent to the host computer according to after coding；The host computer carries out reading data, data to the signal code stream
Frame fractionation, output waveform simultaneously export direction deciding as a result, not only completing the detection of point discharge, are able to record lower discharge pulse
Waveform, moreover it is possible to which discharge source orientation is determined by pulse amplitude.With strong antijamming capability, compact, detection of adjusting the distance is realized
Point discharge identification and orientation detection in 0.5 meter of hemi-sphere range of device.
As a kind of optional scheme, the photoelectric conversion module includes SiC silicon carbide Ultraviolet sensor and I/V conversion
Unit, I/V conversion is that signal code is converted to signal voltage, and the silicon carbide Ultraviolet sensor is used in acquisition shelf depreciation
The ultraviolet signal of generation simultaneously generates electric signal, and the electric signal is converted to analog signal output extremely by the I/V conversion module
Analog module, wide bandgap semiconductor materials forbidden bandwidth is big, responds ultraviolet band compared with high, sensor bulk is small, property
Stablize, quantum efficiency height, is the material more suitable for ultraviolet detection.SiC material compares other wide bandgap semiconductor materials, has
Higher thermal conductivity, sensor structure design are more flexible.SiC material forbidden bandwidth with higher (3-3.3eV), therefore its light
It is higher to compose cutoff frequency, additionally there is high heat conductance, the high advantages such as breakdown voltage, high electron mobility of coming personally.
In the present embodiment, multistage is enlarged into second level amplification, and the analog module includes pre-amplification circuit and second level
Amplifying circuit, the pre-amplification circuit export after carrying out preposition amplification to the analog signal to the second amplifying circuit,
The second amplifying circuit exports after carrying out secondary amplification to analog signal to the digital circuit blocks.
Digital circuit blocks include A/D converting unit, threshold filter unit and data encoding Dispatching Unit, A/D conversion
Unit uses high-precision adc, improves conversion accuracy, and the A/D converting unit carries out mould to the analog signal
Number is converted to digital signal, and the threshold filter unit carries out threshold filter to the digital signal and obtains four-way signal,
The data encoding Dispatching Unit carries out data encoding to the four-way signal, and signal code stream is sent to institute by serial ports
State host computer.
In conjunction with shown in Fig. 2 and 3, host computer has identification positioning software, identifies knowledge of the positioning software to corona discharge phenomenon
Not and the judgement in electric discharge orientation, the identification positioning software are converted into waveform to the signal code stream decoding comprising pulse information
Image exports in real time, the difference exported using detector different directions amplitude, and the azimuth information in judgement point discharge source is simultaneously real-time
Output, detector can acquire point discharge analog signal using ultraviolet detector, in the interface of identification positioning software, in order to
Facilitate expression, the test surface of the detector includes upper and lower, left and right, upper left, lower-left, upper right, the orientation of bottom right eight.
Tip pulse detection system further includes power module, is that system work carries out for alternating current to be converted to operating voltage
Power supply, power module are built-in with voltage conversion circuit, and the supply voltage of the power module includes ± 5V, 3.3V, 1.8V, ability
Domain those of ordinary skill can be not construed as limiting this with flexible choice.
As a kind of optional scheme, the central processing unit of the analog module uses FPGA module, FPGA module
Can it is fast using the speed of service, can parallel data processing altera corp FPGA, this is not construed as limiting.
Tip pulse detection system provided by the invention realizes SiC base photoelectric sensor for the first time and detects in shelf depreciation
In application so that detection system has many advantages, such as low power reguirements, good compatibility, strong antijamming capability system compact.It is right
The existing shelf depreciation detection method such as bit high-frequency method, supercritical ultrasonics technology, the corona discharge detection system based on SiC can be lower
At local, the more efficient detection and positioning for being accurately realized corona discharge.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
A kind of tip pulse detection system provided by the present invention is described in detail above, for the one of this field
As technical staff, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, comprehensive
Upper described, the contents of this specification are not to be construed as limiting the invention.
Claims (9)
1. a kind of tip pulse detection system, which is characterized in that including photoelectric conversion module, analog module, digital circuit
Module, host computer and power supply interface module, wherein
The collected optical signal of corona discharge is converted to electric signal by the photoelectric conversion module, and the electric signal is passed through I/V
Be converted to analog signal；
The analog module carries out multistage amplification to the analog signal, so that the analog signal meets analog-to-digital conversion need
It wants；
The digital circuit blocks carry out analog-to-digital conversion to the amplified analog signal and threshold filter obtains multichannel letter
Number, signal code stream is sent to the host computer to after multi channel signals progress data encoding；
The host computer carries out reading data, data frame fractionation, output waveform to the signal code stream and exports direction deciding knot
Fruit.
2. tip pulse detection system according to claim 1, which is characterized in that the photoelectric conversion module includes SiC
Silicon carbide Ultraviolet sensor and I/V converting unit, what the silicon carbide Ultraviolet sensor was used to generate in acquisition shelf depreciation
Ultraviolet signal simultaneously generates electric signal, and the electric signal is converted to analog signal output to simulating electricity by the I/V conversion module
Road module.
3. tip pulse detection system according to claim 2, which is characterized in that the multistage is enlarged into second level amplification,
The analog module includes pre-amplification circuit and second amplifying circuit, and the pre-amplification circuit is to the analog signal
Output is carried out after preposition amplification to the second amplifying circuit, after the second amplifying circuit carries out secondary amplification to analog signal
It exports to the digital circuit blocks.
4. tip pulse detection system according to claim 3, which is characterized in that the digital circuit blocks include A/D
Converting unit, threshold filter unit and data encoding Dispatching Unit, the A/D converting unit carry out mould to the analog signal
Number is converted to digital signal, and the threshold filter unit carries out threshold filter to the digital signal and obtains four-way signal,
The data encoding Dispatching Unit carries out data encoding to the four-way signal, and signal code stream is sent to institute by serial ports
State host computer.
5. tip pulse detection system according to claim 1, which is characterized in that the host computer has identification positioning soft
Part, the identification positioning software decodes the signal code stream comprising pulse information, and is converted into waveform image and exports in real time, utilizes
The difference of detector different directions amplitude output determines the azimuth information in point discharge source and exports in real time.
6. tip pulse detection system according to claim 1, which is characterized in that further include power module, be used for city
It is that system work is powered that electricity, which is converted to operating voltage,.
7. tip pulse detection system according to claim 6, which is characterized in that the supply voltage packet of the power module
Include ± 5V, 3.3V, 1.8V.
8. tip pulse detection system according to claim 5, which is characterized in that the test surface of the detector includes
Upper and lower, left and right, upper left, lower-left, upper right, the orientation of bottom right eight.
9. tip pulse detection system according to claim 1, which is characterized in that the centre of the analog module
It manages device and uses FPGA module.
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| CN201810650344.5A CN108896881A (en) | 2018-06-22 | 2018-06-22 | A kind of tip pulse detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810650344.5A CN108896881A (en) | 2018-06-22 | 2018-06-22 | A kind of tip pulse detection system |
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|---|---|---|---|---|
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2018
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