CN102230952A - Corona detection method based on ultraviolet photons - Google Patents
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Abstract
The invention discloses a corona detection method based on ultraviolet photons, and the method comprises the following steps: (1) detecting a corona signal; (2) processing a pulse signal; (3) calibrating detection data; and (4) storing and analyzing the detection data. The detection method disclosed by the invention is convenient to operate and stable in test process, the data is reliable, and users can visually obtain the detection result by using the detection method. By utilizing the method provided by the invention remote non-contact detection based on the radiation of ultraviolet light generated by the detected corona can be realized, the time consumed in the detection process is short, the result is accurate and does not need to be solely processed by a computer, a report database can be generated, and the overall system is simple to operate and convenient to carry.
Description
Technical field
The invention belongs to electric system electrical device discharge monitoring technical field, relate in particular to a kind ofly, be applicable to that power transmission and transformation operation pick-up unit is carried out corona to be detected and the fault judgement analysis based on ultraviolet photon corona detection method and device thereof.
Background technology
High-voltage electric power circuit is the lifeblood of national economy, and is along with the construction energetically of high ferro, intelligent grid, just even more important for the maintaining of power circuit electric power pick-up unit.The most of high-voltage electrical apparatus pick-up unit of electric system external insulation structure has the non-uniform electric field feature, in severe non-uniform electric field, after voltage is increased to certain value on the gas gap, can form the very high passage of a conduction in the gap, claims gas gap to puncture.After the puncture, have different discharge types according to power, electrode form, gaseous tension etc., in low pressure, power hour, discharge shows as the aura that is full of whole gap or pulls out the discharge of electricity form; Under high pressure, often show as discharge types such as spark, electric arc even flashover; In severe non-uniform electric field, can begin discharge earlier than the strength in internal field, be called corona discharge.The high-voltage electrical apparatus pick-up unit is under normal operating condition, and a little less than its surface corona, electromagnetic interference (EMI) is little.But because unreasonable, the designing quality problem or affected by environment of design, and pick-up unit in service surface defective occurs and can cause all that electric field is concentrated and corona discharge takes place.For UHV (ultra-high voltage), extra-high voltage electrical device, the corona discharge feature is obvious, and brings correlation effects such as radio interference, energy loss, noise pollution thus.
The main method that corona detects has: visual inspection, the online detection of leakage current, ultrasound examination, infrared thermal imaging and UV detection etc.The at present main method that adopts UV detection utilizes promptly that corona discharge can give off this characteristic of ultraviolet light in the air, uses the ultraviolet light detection technique to observe the situation that discharge takes place.The electromagnetic radiation that the high voltage transmission line corona discharge produces belongs to ultraviolet ray greatly, and most of wavelength also has fraction at 240-280nm at 280-400nm, and the latter be a blind ultraviolet band of day.The target of blind ultraviolet band detects to day, can avoid the interference of sun background, and accuracy rate is very high.Detecting and locating corona discharge is the important application of ultraviolet detection technology at civil area.Utilized the UV corona monitoring in the past, the one, according to what corona discharge intensity is quantized with ultraviolet light subnumber in its shown unit interval, another kind of approach is according between ultraviolet image area and the discharge capacity linear relationship being arranged, to discharge scenario, the insulation situation is carried out classification according to the state of hot spot.
Photon quantizes the ultraviolet photon that means are produced when unit of display time internal object corona takes place in real time, and characterizes the intensity of corona discharge as parameter.The photon number variation range is bigger in the detected corona discharge unit interval of ultraviolet imagery instrument, be difficult to statistical study, test result is relevant with experimenter's on-site experience, cause measuring error easily, be unfavorable for that electrical device discharge process quantizes and predict the fault progression trend of pick-up unit.The photon number that instrument shows is closely related with the gain of instrument self, and relevant with environmental factors such as the distance of detecting instrument and point of discharge, air humiditys, the accurate response strength of discharge, must effectively demarcate the photon number of instrument demonstration.At present,, mainly undertaken,, judge the defective of circuit with human eye or computing machine comparative analysis ultraviolet or the visible images that collects by the mode of artificial line walking to the maintenance of high-voltage electric power circuit.Russia utilizes atmosphere ultraviolet window to detect, and this camera work is not that effect is fine at night at the ultraviolet non-solar-blind band, can not use by day; Israel and South Africa all adopt non-solar-blind band to detect, successfully avoided the interference of sunlight background, but data that can not very direct acquisition corona ultraviolet radiation intensity are not easy corona discharge UV radiation intensity is carried out quantitative test, are difficult to form the identification of objective corona failure strength; The corona of the U.S. detects the high-precision doubling of the image technology that adopts, two optical lens high precision overlap, domestic rich high common CCD and the ultraviolet optics optical filtering of adopting, the glass mirror mode is changed in employing, visual light imaging picture and ultraviolet image are carried out overlay analysis, the both exists the optical system requirement high, and imaging time is long, is not suitable for the detection of dynamic of cruising.The general ultraviolet imager remedies the under-sensitive mode 2 kinds of modes: strengthen signal through chip, advantage is to have increased hot spot, and shortcoming is to form shadow below each corona image, and the corona image has the distortion sense; Increase wavelength coverage, adopt Night, advantage is to have strengthened the ultraviolet waves energy, and shortcoming is to detect at night.At present but UV corona detects pick-up unit and generally image is carried out frame and superpose and strengthen the apparent intensity of UV image, by the software and hardware noise reduction technology of vision signal being reduced the noise of image, need computing machine to carry out analyzing and processing, power supply power consumption is big, volume is big, be inconvenient to carry, and complicated operation, complex structure, manufacturing cost, maintenance cost height, cost an arm and a leg, photon number can't dynamically be exported, and it is short to detect distance, Flame Image Process is required high, need the high-precision optical system, be difficult to satisfy airborne requirement of patrolling and examining.
How to make corona detect the pick-up unit cost and reduce, and further improve accuracy in detection and detect distance, realize automatic identification and warning electric discharge type, need be to the improvement of existing corona detection method and haveing breakthrough property of device.Therefore, how research can quantize real in necessary by sensitivity and the strength of discharge that adopts new detection method and device to increase substantially the corona detection under the situation of the components and parts that use existing maturation.
Summary of the invention
It is a kind of based on ultraviolet photon corona detection method that purpose of the present invention just is to provide, and it is the detection method that the reliable and user of a kind of easy and simple to handle, stable testing, data can obtain testing result intuitively.
To achieve these goals, the technical solution used in the present invention is such: a kind of based on ultraviolet photon corona detection method, comprise the steps:
(1) detects corona signal: obtain the ultraviolet signal of discharge generation by pick-up unit, again electric signal is amplified and be converted to pulse voltage signal, realize impedance matching;
(2) pulse signal is handled: signal processing circuit received pulse voltage signal in the governor circuit of pick-up unit, after pulse voltage signal is carried out shaping, Filtering Processing, be connected with the pulsed frequency decision circuitry again, carry out discriminatory analysis by paired pulses frequency and pulsewidth;
(3) detect data scaling: detect the detected object distance by laser range finder, qualitative, quantitative ground carries out on-line analysis to the high-tension line pick-up unit, to corona, pull out electricity, spark, low baking temperature flower and sort out and quantize, quantitatively determine corona position and corona discharge severe degree, provide the corona discharge indicator-specific statistics that high accuracy number quantizes, output identification conclusion;
(4) detect data storage and analysis: the output recognition result with detect distance, and will detect data and be saved in the storage card.
As preferably, the electric signal in above-mentioned steps (1) is exported by the Ultraviolet sensor in the pick-up unit.
As preferably, in the above-mentioned steps (3), quantize to ultraviolet decay according to pulse strength, observed range, temperature, humidity and coefficient correction and demarcate.It is that the ultraviolet photon that is produced when unit interval internal object corona is taken place is measured that photon quantizes, by the pulse strength that produces is the intensity that parameter characterizes corona discharge, pulse number is directly proportional with the photon numbers of incident, measure photoelectron umber of pulse in the unit interval with method of counting, just be equivalent to detect the UV radiation light intensity.These features have not having strict border, having some overlapping region of many obfuscations, adopted fuzzy reasoning and membership function to come the corona identifying is described, because ultraviolet atmospheric attenuation, pulse and target range are inversely proportional to, temperature and humidity is non-linear to the influence of decay, by sample is measured, set the adjustable ultraviolet of the present invention in specific utilization decay of correction factor and demarcated with this.
As preferably, described recognition result with detect distance and can on the display screen of pick-up unit, show.
As preferably, in above-mentioned steps (1), aim at tested corona discharge position, to obtain the ultraviolet signal of discharge generation by the eyepiece of pick-up unit.
Operation steps flow process of the present invention is:
(1) start detection device, pick-up unit begins initialization after receiving order;
(2) time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information, press then EOP (end of program) of cancel key; Described test parameter information comprises observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range;
(3) end is set after, reading system clock, the store path of the record data that select to generate;
(4) by pick-up unit aiming detected object, automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection in conjunction with detecting distance, enter data analysis and demarcate after pulse signal Processing, threshold filtering and peak value keep; Wherein, in conjunction with detecting distance, the classified statistic method by detected pulsed frequency and amplitude is realized the quantification and the juggling of corona intensity and type to the ultraviolet photon high-precision digital;
(5) with recognition result with detect data message such as distance grade and show and store.
Classified statistic method in the described operation steps process step (4) may further comprise the steps:
(1) maximum amplitude of discharge in the statistics fixed time section;
(2) surpass the discharge time that sets threshold value in the statistics setting-up time section;
(3) calculate and show discharge amplitude in this time period and detect corresponding relation between distance.
As preferably, the amplitude of described pulse voltage signal and discharge time statistics adopt software peak value maintenance method.Time period that the need that described software peak value maintenance method is formulated according to the user are analyzed and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, the corresponding detection apart from the ultraviolet attenuation law, calculate discharge amplitude and strength of discharge in this time period at last, fault degree and electric discharge type are discerned.
Described job step flow process has three kinds of running statuses, and these three kinds of running statuses are that off-line data analysis, fixed point detect and line walking detects.When off-line data was analyzed, after historical data called in, the image conversion that carries out data analysis and result automatically showed, finishes data conversion storage, and data analysis is printed, and generates form, the pick-up unit shutdown.When fixed point detected: (1) start detection device began software initialization, loaded with hardware after receiving order; (2) time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information such as observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, press then EOP (end of program) of cancel key; (3) end is set after, reading system clock, the store path of the record data that select to generate; (4) by eyepiece aiming detected object, beginning automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection in conjunction with detecting distance, are carried out data analysis and are demarcated after pulse signal Processing, threshold filtering and peak value keep; (5) with recognition result with detect data message such as distance grade and show and store.When described line walking detected: (1) start detection device began software initialization, loaded with hardware after receiving order; (2) time period, cache size, threshold threshold value etc. of sampling rate, collection are set, fill in test parameter information such as observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, press then EOP (end of program) of cancel key; (3) end is set after, reading system clock, the store path of the record data that select to generate; By eyepiece aiming detected object, beginning automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection are after pulse signal Processing, threshold filtering and peak value keep, and in conjunction with detecting distance, the selected data analysis is demarcated; (4) with recognition result with detect data message such as distance grade and show and store; Finish data conversion storage, data analysis is printed, and generates form; (5) carry out new detected object aiming once more, the detection task of setting is finished in detection and data processing, data storage and the report generation of a beginning new round, the pick-up unit shutdown.
Compared with prior art, the invention has the advantages that:
1, on the present invention basis that the attenuation law in atmosphere has carried out exploring to the corona discharge rule of development and corona discharge process middle-ultraviolet lamp, reselecting suitable characterization parameter quantizes corona discharge intensity, find out this parameter and the corresponding relation in each stage of corona discharge, propose corona discharge and detect measuring technology and criterion.Adopt ultraviolet light transducer, detect the detected object distance by optical laying eyepiece and optically focused camera lens and laser range finder, according to pulse strength, observed range, temperature, humidity and coefficient correction quantize, qualitative, quantitative ground carries out on-line analysis to the high-tension line pick-up unit, to corona, pull out, spark, the low baking temperature flower waits the high precision that has realized based on ultraviolet photon to sort out digital quantization, the output recognition result, the data that corona is detected are reliable more comprehensively, help the assessment of corona discharge fault level and degree of discharge, have direct processing, simple in structure, it is definite to detect data, response identification is fast, advantages such as online output.
2, the present invention obtains pick-up unit running status and failure message by the solar blind UV of receiving detection device corona discharge radiation, can detect by day, in observation process, do not need directly to contact with the operation pick-up unit, can accomplish on-line monitoring, also not need other check and analysis devices to cooperate.Therefore, have operating aspect, quickness and high efficiency, be not subjected to characteristics such as weather effect.
3, the present invention can be equipped on patrolling and examining of automobile or helicopter enterprising line road.Because the response speed of ultraviolet detection is fast, when moving, still can finish the monitoring task in tested pick-up unit and monitoring instrument, not only improve detection efficiency greatly, and reduced labour intensity.
4, the present invention has realized carrying out remote non-contact detection by the ultraviolet radiation that tested corona produces, testing process weak point consuming time, and the result is accurate, does not need the computing machine individual processing, can generate report database, and total system is simple to operate, and is easy to carry.
Description of drawings
Fig. 1 is a workflow synoptic diagram of the invention process;
User's operating process synoptic diagram when Fig. 2 is the invention process;
Fig. 3 is the structural representation of employed pick-up unit among the present invention.
Embodiment
The invention will be further described with concrete enforcement below in conjunction with accompanying drawing;
With reference to figure 1, a kind of based on ultraviolet photon corona detection method, its step comprises:
(1) ultraviolet light transducer detects corona signal: by the eyepiece of aiming pick-up unit, aim at tested corona discharge position, obtain the ultraviolet signal of discharge generation, the electric signal of Ultraviolet sensor output is amplified and be converted to pulse voltage signal by the amplifying circuit in the governor circuit in the pick-up unit, and realize impedance matching.
(2) pulse signal is handled: signal processing circuit received pulse signal in the governor circuit, after pulse signals is carried out shaping, Filtering Processing, be connected with the pulsed frequency decision circuitry again, and carry out discriminatory analysis by paired pulses frequency and pulsewidth.
(3) detect data scaling: detect the detected object distance by laser range finder, quantize according to pulse strength, observed range, temperature, humidity and coefficient correction, qualitative, quantitative ground carries out on-line analysis to the high-tension line pick-up unit, to corona, pull out electricity, spark, low baking temperature flower etc. and sort out and quantize, quantitatively determine corona position and corona discharge severe degree, provide the corona discharge indicator-specific statistics that high accuracy number quantizes, output identification conclusion.
(4) detect data storage and analysis: on display screen, show recognition result and detect distance, to detect data is saved in the storage card, the output of supporting bus interface Real-time and Dynamic can be carried out off-line and online detection data analysis and report generation on pick-up unit.
Corona testing flow process of the present invention is: the start detection device begins initialization apparatus after receiving order; Time period, cache size, threshold threshold value of sampling rate, collection etc. are set, fill in test parameter information, comprise observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, press then EOP (end of program) of cancel key, enter next step; After end is set, reading system clock, the store path of the record data that selection generates; By eyepiece aiming detected object, beginning automatic range and focusing; Detect pick-up unit and begin to detect identification, data after the collection are after pulse signal Processing, threshold filtering and peak value keep, in conjunction with detecting distance, classified statistic method according to detected ultraviolet light transducer pulsed frequency and amplitude comes the ultraviolet photon high-precision digital, realize the quantification and the juggling of corona intensity and type, enter data analysis and demarcate; With recognition result with detect data message such as distance grade and show and store; Finish data conversion storage, data analysis is printed, and generates form; The pick-up unit shutdown.Wherein, wherein classified statistic method comprises: the maximum amplitude of discharge in (1) statistics fixed time section; (2) the interior discharge time that surpasses certain threshold value of statistics setting-up time section; (3) calculate and show discharge amplitude in this time period and detect corresponding relation between distance.The pulse amplitude of described pulse voltage signal and discharge time statistics adopt software peak value maintenance method, time period that the need that this method is formulated according to the user are analyzed and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, the corresponding detection apart from the ultraviolet attenuation law, calculate discharge amplitude and strength of discharge in this time period at last, fault degree and electric discharge type are discerned.
With reference to figure 2, job step flow process of the present invention has three kinds of running statuses, and off-line data analysis, fixed point detect and line walking detects.When off-line data was analyzed, after historical data called in, the image conversion that carries out data analysis and result automatically showed, finishes data conversion storage, and data analysis is printed, and generates form, the pick-up unit shutdown.
When fixed point detected, the start detection device began software initialization, loaded with hardware after receiving order; Time period, cache size, threshold threshold value of sampling rate, collection etc. are set, fill in test parameter information, comprise observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, press then EOP (end of program) of cancel key, enter next step; After end is set, reading system clock, the store path of the record data that selection generates; By eyepiece aiming detected object, beginning automatic range and focusing; Detect pick-up unit and begin to detect identification, the data after the collection in conjunction with detecting distance, are carried out data analysis and are demarcated after pulse signal Processing, threshold filtering and peak value keep; With recognition result with detect data message such as distance grade and show and store; Finish data conversion storage, data analysis is printed, and generates form; The pick-up unit shutdown.
When line walking detected, the start detection device began software initialization, loaded with hardware after receiving order; Time period, cache size, threshold threshold value of sampling rate, collection etc. are set, fill in test parameter information, comprise observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, press then EOP (end of program) of cancel key, enter next step; After end is set, reading system clock, the store path of the record data that selection generates; By eyepiece aiming detected object, beginning automatic range and focusing; Detect pick-up unit and begin to detect identification, the data after the collection are after pulse signal Processing, threshold filtering and peak value keep, and in conjunction with detecting distance, the selected data analysis is demarcated; With recognition result with detect data message such as distance grade and show and store; Finish data conversion storage, data analysis is printed, and generates form; Carry out new detected object aiming once more, the detection and the data processing of a beginning new round, the detection task of setting is finished in data storage and report generation, the pick-up unit shutdown.
With reference to figure 3, described pick-up unit, its structure comprises: its structure comprises: housing 1, eyepiece 2, laser ranging module 3, ultraviolet optics camera lens 4, ultraviolet light transducer 5, power-switching circuit 6, governor circuit 7, power module 8, display module 9, storage card 10, bus interface 11, power light 12, alarm lamp 13, operation push-button panel 14.Housing 1 is rectangular or long tubular, and it is made for plastics or metal.Aiming eyepiece 2 is installed in housing 1 top, is focusing automatically in certain observation scope; Laser ranging module 3 is placed in the housing 1, is in eyepiece 2 same axis normal belows; In housing 1, be provided with by generating laser and circuit board, laser pickoff and circuit board thereof, laser ranging data processing integrated circuit plate, this module links to each other with signal processing circuit, and each detection distance is analyzed.Ultraviolet optics camera lens 4, be installed in housing 1 front end, be placed on laser ranging module 3 same axis normal belows, corresponding transmission wave band is 180～280nm, have in this wavelength band and to be higher than the purple rate of 80% optical lens, the aperture of lens diameter is 40～200mm, Ultraviolet sensor 5 is placed on the focus place of lens 4, its response wave band is 180～280nm, its sensitive detection unit is placed on the optical lens focus, added the RC pulse driving circuit in the detector detection module and detected ultraviolet radiation, adopted periodically to reduce anode voltage, made it be lower than discharge and keep the self-sustaining that voltage method has prevented discharge current.Power-switching circuit 6 carries out input voltage the high pressure that ultraviolet light transducer 5 conditions of work need that converts to of DC/DC.Governor circuit 7 comprises amplifying circuit and signal processing circuit, and amplifying circuit places in the housing 1 and is connected with ultraviolet light transducer 5 pulse output ends, to the electric signal amplification of Ultraviolet sensor 5 outputs and be converted to voltage signal, and the realization impedance matching; Signal processing circuit wherein, place in the housing 1 and link to each other with amplification circuit output end, it adopts modular design, comprise pulse receiving circuit, pulse shaping circuit, digital filter circuit, pulsed frequency decision circuitry, pulse width decision circuitry, range finding computing module and ultraviolet discharge mode identification circuit, pulse signals is carried out shaping, filtering and digital processing and pattern-recognition.Power module 8 is positioned at housing 1, adopts the power supply of 5V or 12V lithium battery module; Display module 9, being positioned at housing 1 side links to each other with power module 8 with signal processing circuit, pick-up unit of the present invention, also comprise data-carrier store and terminal liquid crystal display, display module is given the user with The results of data processing by the front panel interface display, allows the user can obtain observed range and strength of discharge data intuitively.Storage card 10 places in the housing 1, is used for record and preserve detects data, supports onlinely to call data and analysis with off-line.Bus interface 11 places housing 1 rear end, supports the USB output of testing result, and another function of this interface is an external power interface, for the components and parts in the housing and circuit provide power supply.Power light 12 is arranged on the housing 1, and power light 12 green lights are bright when detector is worked.Alarm lamp 13 is arranged on the housing 1, and alarm lamp 13 red lights are bright when corona is reported to the police.Operation push-button panel 14, this panel are positioned at housing display screen next door, are provided with and inquire about by panel.
The analysis software that runs on the pick-up unit terminal is formed data acquisition module, data analysis module and data management module by three big modules.The interface that corona testing mode and state are set is provided for inspection work; Acquisition function to the Ultraviolet sensor output signal is provided; Preservation and read functions to original experimental data are provided; Unloading and read functions to the information off-line that extracts are provided; Presentation Function to original signal and analysis afterpulse counting, amplitude and identification types is provided; Database management function to mass data is provided; Provide report form statistics to generate and printing function.Analysis software can have off-line data analysis and two kinds of running statuses of on-line monitoring.When off-line data is analyzed, after historical data is called in the storage card, Operational Data Analysis and result's graphical demonstration automatically; During on-line monitoring, operations such as the initialization of advanced line correlation and hardware testing, real-time then image data, the analysis and the image conversion that carry out data simultaneously show that interface is supported online dynamic output.
Referring to Fig. 1 to Fig. 3, on operation push-button panel 14, set detected parameters, by adopting eyepiece 2 aim detecting objects, corona discharge gives off ultraviolet light, after the system through ultraviolet optics camera lens 4, focuses on the ultraviolet light transducer 5.Power-switching circuit 6 produces a pulse direct current high pressure and is added in and makes its triggering work on the ultraviolet light transducer 5, and ultraviolet light transducer 5 is converted into electric signal with light signal.Ultraviolet light transducer 5 pulse outputs are connected with signal processing circuit with amplifying circuit in the governor circuit 7, after pulse receiving circuit, pulse shaping circuit, digital filter circuit pulse signals are carried out shaping, Filtering Processing, be connected with the pulsed frequency decision circuitry again, carry out discriminatory analysis by paired pulses frequency and pulsewidth.The amplitude of pulse and ultraviolet light intensity are directly proportional, the luminous mode of pulse waveform and UV radiation is relevant, the electric impulse signal of ultraviolet light pulse signal and corona discharge has direct corresponding relation, be that light pulse amplitude, number and electric pulse amplitude, number have direct linear relationship, therefore the distribution of pulses of light pulse and pulse amplitude distribute and can reflect the development trend of discharge, can be used as the index of detection, by processing and analysis, just can detect the harm of the strong and weak and judgement of faint corona discharge to insulation to these indexs.Detect the detected object distance by laser ranging module 3, quantize according to pulse strength, observed range, temperature, humidity and coefficient correction, qualitative, quantitative ground carries out on-line analysis to the high-tension line pick-up unit, to corona, pull out electricity, spark, low baking temperature flower etc. and sort out and quantize, the indication of reporting to the police of output identification signal output signal pilot lamp 13 taking alarm, output signal demonstrates recognition result and detects distance on display module 9 simultaneously, detect data and be kept in the storage card 10, also supporting bus interface 11 Real-time and Dynamic output.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and substitutes and improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. one kind based on ultraviolet photon corona detection method, it is characterized in that: comprise the steps:
(1) detects corona signal: obtain the ultraviolet signal of discharge generation by pick-up unit, again electric signal is amplified and be converted to pulse voltage signal, realize impedance matching;
(2) pulse signal is handled: signal processing circuit received pulse voltage signal in the governor circuit of pick-up unit, after pulse voltage signal is carried out shaping, Filtering Processing, be connected with the pulsed frequency decision circuitry again, carry out discriminatory analysis by paired pulses frequency and pulsewidth;
(3) detect data scaling: detect the detected object distance by laser range finder, qualitative, quantitative ground carries out on-line analysis to the high-tension line pick-up unit, to corona, pull out electricity, spark, low baking temperature flower and sort out and quantize, quantitatively determine corona position and corona discharge severe degree, provide the corona discharge indicator-specific statistics that high accuracy number quantizes, output identification conclusion;
(4) detect data storage and analysis: the output recognition result with detect distance, and will detect data and be saved in the storage card.
2. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: the electric signal in the above-mentioned steps (1) is exported by the Ultraviolet sensor in the pick-up unit.
3. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: in the above-mentioned steps (3), quantize to ultraviolet decay according to pulse strength, observed range, temperature, humidity and coefficient correction and demarcate.
4. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described recognition result can show on the display screen of pick-up unit with the detection distance.
5. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: in above-mentioned steps (1), aim at tested corona discharge position, to obtain the ultraviolet signal of discharge generation by the eyepiece of pick-up unit.
6. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: the operation steps flow process is:
(1) start detection device, pick-up unit begins initialization after receiving order;
(2) time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information, press then EOP (end of program) of cancel key;
(3) end is set after, reading system clock, the store path of the record data that select to generate;
(4) by pick-up unit aiming detected object, automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection in conjunction with detecting distance, enter data analysis and demarcate after pulse signal Processing, threshold filtering and peak value keep;
(5) with recognition result with detect data message such as distance grade and show and store.
7. according to claim 5 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described test parameter information comprises observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range.
8. according to claim 1 a kind of based on ultraviolet photon corona detection method, it is characterized in that: in above-mentioned steps (3), in conjunction with detecting distance, classified statistic method by detected pulsed frequency and amplitude is realized the quantification and the juggling of corona intensity and type to the ultraviolet photon high-precision digital.
9. according to claim 8 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described classified statistic method may further comprise the steps:
(1) maximum amplitude of discharge in the statistics fixed time section;
(2) surpass the discharge time that sets threshold value in the statistics setting-up time section;
(3) calculate and show discharge amplitude in this time period and detect corresponding relation between distance.
10. a kind of based on ultraviolet photon corona detection method according to one of claim 1 to 9, it is characterized in that: the amplitude of described pulse voltage signal and discharge time statistics adopt software peak value maintenance method.
11. it is according to claim 10 a kind of based on ultraviolet photon corona detection method, it is characterized in that: time period that the need that described software peak value maintenance method is formulated according to the user are analyzed and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, the corresponding detection apart from the ultraviolet attenuation law, calculate discharge amplitude and strength of discharge in this time period at last, fault degree and electric discharge type are discerned.
12. according to claim 6 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described job step flow process has three kinds of running statuses, these three kinds of running statuses are that off-line data analysis, fixed point detect and line walking detects.
13. it is according to claim 12 a kind of based on ultraviolet photon corona detection method, it is characterized in that: when off-line data is analyzed, after historical data called in, automatically the image conversion that carries out data analysis and result shows, finish data conversion storage, data analysis is printed, and generates form, the pick-up unit shutdown.
14. according to claim 12 a kind of based on ultraviolet photon corona detection method, it is characterized in that: when fixed point detects:
(1) start detection device begins software initialization, loaded with hardware after receiving order;
(2) time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information, press then EOP (end of program) of cancel key;
(3) end is set after, reading system clock, the store path of the record data that select to generate;
(4) by eyepiece aiming detected object, beginning automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection in conjunction with detecting distance, are carried out data analysis and are demarcated after pulse signal Processing, threshold filtering and peak value keep;
(5) with recognition result with detect data message such as distance grade and show and store.
15. according to claim 14 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described parameter information comprises observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range.
16. according to claim 12 a kind of based on ultraviolet photon corona detection method, it is characterized in that: when described line walking detects:
(1) start detection device begins software initialization, loaded with hardware after receiving order;
(2) time period, cache size, threshold threshold value etc. of sampling rate, collection are set, fill in test parameter information, press then EOP (end of program) of cancel key;
(3) end is set after, reading system clock, the store path of the record data that select to generate; By eyepiece aiming detected object, beginning automatic range and focusing, pick-up unit begins to detect identification, and the data after the collection are after pulse signal Processing, threshold filtering and peak value keep, and in conjunction with detecting distance, the selected data analysis is demarcated;
(4) with recognition result with detect data message such as distance grade and show and store; Finish data conversion storage, data analysis is printed, and generates form;
(5) carry out new detected object aiming once more, the detection task of setting is finished in detection and data processing, data storage and the report generation of a beginning new round, the pick-up unit shutdown.
17. according to claim 16 a kind of based on ultraviolet photon corona detection method, it is characterized in that: described test parameter information comprises observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range.
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