CN102230952B - Corona detection method based on ultraviolet photons - Google Patents

Corona detection method based on ultraviolet photons Download PDF

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Publication number
CN102230952B
CN102230952B CN201110096701.6A CN201110096701A CN102230952B CN 102230952 B CN102230952 B CN 102230952B CN 201110096701 A CN201110096701 A CN 201110096701A CN 102230952 B CN102230952 B CN 102230952B
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data
ultraviolet
circuit
detection
corona
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CN201110096701.6A
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CN102230952A (en
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张列平
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成都凯迈科技有限公司
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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

A kind of based on ultraviolet photon corona detection method

Technical field

The invention belongs to the electric pick-up unit of electric system electric discharge monitoring technical field, relate in particular to a kind ofly based on ultraviolet photon corona detection method and device thereof, be applicable to power transmission and transformation operation pick-up unit to carry out corona detection and fault discriminatory analysis.

Background technology

High-voltage electric power circuit is the lifeblood of national economy, 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 non-uniform electric field feature, and in severe non-uniform electric field, on gas gap, voltage is increased to after certain value, can in gap, form the passage that a conduction is very high, claims that gas gap punctures.After puncturing, according to power, electrode form, gaseous tension etc., have different discharge types, in low pressure, power hour, electric discharge shows as and is full of the aura in whole gap or pulls out discharge of electricity form; Under high pressure, often show as the even discharge type such as flashover of spark, electric arc; In severe non-uniform electric field, Hui internal field first starts electric discharge compared with strength, is called corona discharge.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 due to unreasonable, the designing quality problem or affected by environment of design, and pick-up unit in service surface occurs that defect all can cause that electric field is concentrated and corona discharge occurs.For UHV (ultra-high voltage), the electric pick-up unit of extra-high voltage, corona discharge feature is obvious, and brings thus the correlation effects such as radio interference, energy loss, noise pollution.

The main method of corona detection has: the detection online of visual inspection, leakage current, ultrasound examination, infrared thermal imaging and UV detection etc.The main method that adopts UV detection, utilizes corona discharge in air can give off this characteristic of ultraviolet light at present, uses ultraviolet light detection technique to observe the situation that electric discharge occurs.The electromagnetic radiation that high voltage transmission line corona discharge produces belongs to ultraviolet ray greatly, and most of wavelength is at 280-400nm, also has fraction at 240-280nm, and the latter is a day blind ultraviolet band.To day, the target of blind ultraviolet band detects, and can avoid the interference of sun background, and accuracy rate is very high.Detecting and locating corona discharge is that ultraviolet detection technology is in an important application of civil area.Utilized 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 to having linear relationship between ultraviolet image area and discharge capacity, according to the state of hot spot, to discharge scenario, insulation situation is carried out classification.

Photon quantizes the ultraviolet photon that means produce when unit of display time internal object corona occurs in real time, and as parameter, characterizes the intensity of corona discharge.In the detected corona discharge unit interval of ultraviolet imager, photon number variation range is larger, be difficult to statistical study, test result is relevant with experimenter's on-site experience, easily cause measuring error, be unfavorable for that electric pick-up unit discharge process quantizes and the fault progression trend of predicted detection device.The photon number that instrument shows is closely related with the gain of instrument self, and relevant with the environmental factor such as the distance of detecting instrument and point of discharge, air humidity, accurate response strength of discharge, must effectively demarcate the photon number of instrument demonstration.At present, the maintenance to high-voltage electric power circuit, is mainly undertaken by the mode of artificial line walking, by the ultraviolet collecting or visible images, by the defect of human eye or computing machine comparative analysis judgement circuit.Russia utilizes atmosphere ultraviolet window to detect, and this camera work is not that effect is fine at night at 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 can not very directly obtain the data of corona ultraviolet radiation intensity, be not easy corona discharge UV radiation intensity to carry out quantitative test, be difficult to form the identification of objective corona failure strength; The corona detection of the U.S. adopts high-precision doubling of the image technology, two optical lens high precision overlap, domestic rich high common CCD and the ultraviolet optics optical filtering of adopting, glass mirror mode is changed in employing, visual light imaging picture and ultraviolet image are carried out to overlay analysis, both exist optical system to be required high, imaging time is long, is not suitable for the detection of dynamic of cruising.General ultraviolet imager makes up under-sensitive mode 2 kinds of modes: through chip strengthening signal, advantage is to have increased hot spot, and shortcoming is below each corona image, to form shadow, and corona image has distortion sense; Increase wavelength coverage, adopt Night, advantage is to have strengthened ultraviolet waves energy, and shortcoming is to detect at night.What at present UV corona detected that pick-up unit generally carries out image that frame superposes to strengthen UV image can apparent intensity, by the software and hardware noise reduction technology to vision signal, reduce the noise of image, need computing machine to carry out analyzing and processing, power supply power consumption is large, volume is large, be inconvenient to carry, and complicated operation, complex structure, manufacturing cost, maintenance cost are high, expensive, photon number cannot dynamically be exported, and detects distance short, high to image processing requirements, need high-precision optical system, be difficult to meet airborne requirement of patrolling and examining.

How to make corona detection pick-up unit cost, and further improve accuracy in detection and detect distance, realize automatic identification and warning to electric discharge type, improvement that need to be to existing corona detection method and haveing breakthrough property of device.Therefore, how research can be in the situation that the components and parts of the existing maturation of use be necessity by sensitivity and the strength of discharge quantification that adopts new detection method and device to increase substantially corona detection in fact.

Summary of the invention

It is a kind of based on ultraviolet photon corona detection method that object of the present invention is just 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) detect corona signal: by pick-up unit, obtain the ultraviolet signal of discharge generation, then electric signal is amplified and be converted to pulse voltage signal, realize impedance matching;

(2) pulse signal is processed: signal processing circuit received pulse voltage signal in the governor circuit of pick-up unit, pulse voltage signal is carried out after shaping, filtering processing, be connected with pulsed frequency decision circuitry again, by paired pulses frequency and pulsewidth, carry out discriminatory analysis;

(3) detect data scaling: by laser range finder, detect detected object distance, high-tension line pick-up unit is carried out to on-line analysis qualitative, quantitative, 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 analyze: export recognition result and detect distance, and detection data are saved in storage card.

As preferably, the Ultraviolet sensor of the electric signal in above-mentioned steps (1) in pick-up unit exported.

As preferably, in above-mentioned steps (3), according to pulse strength, observed range, temperature, humidity and coefficient correction, quantize the decay to ultraviolet and demarcate.It is that the ultraviolet photon producing when unit interval internal object corona is occurred is measured that photon quantizes, by the pulse strength producing, be the intensity that parameter characterizes corona discharge, pulse number is directly proportional to the photon numbers of incident, with method of counting, measure the photoelectron umber of pulse in the unit interval, be just equivalent to detect UV radiation light intensity.These features have there is no strict border, having some overlapping region of many obfuscations, adopted fuzzy reasoning and membership function to be described corona identifying, due to ultraviolet atmospheric attenuation, pulse and target range are inversely proportional to, temperature and humidity is non-linear on the impact of decay, by sample is measured, set correction factor adjustable with this to the present invention the ultraviolet in specific utilization decay demarcate.

As preferably, described recognition result with detect distance can be in the demonstration screen display of pick-up unit.

As preferably, in above-mentioned steps (1), by the eyepiece of pick-up unit, aim at tested corona discharge position, to obtain the ultraviolet signal of discharge generation.

Operation steps flow process of the present invention is:

(1) start detection device, pick-up unit starts initialization after receiving order;

(2) time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information, by cancel key EOP (end of program); Described test parameter information comprises observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range;

(3) reading system clock, the store path of the record data that selection generates are set after end;

(4) by pick-up unit, aim at detected object, automatic range and focusing, pick-up unit starts to detect identification, and the data after collection, after pulse signal processing, threshold filtering and peak value keep, in conjunction with detecting distance, enter data analysis and demarcate; Wherein, in conjunction with detecting distance, the classified statistic method by the pulsed frequency that detects and amplitude is to ultraviolet photon high-precision digital, and the quantification that realizes corona intensity and type is processed with differentiating;

(5) wait data message show and store recognition result and detection distance.

Classified statistic method in described operation steps process step (4) comprises the following steps:

(1) maximum amplitude of electric discharge in statistics fixed time section;

(2) in statistics setting-up time section, surpass the discharge time that sets threshold value;

(3) calculate and show this time period interior electric discharge amplitude and detect the corresponding relation between distance.

As preferably, the amplitude of described pulse voltage signal and discharge time statistics adopt software peak value keeping method.The time period that the need that described software peak value keeping method is formulated according to user are analyzed and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, corresponding detection apart from ultraviolet attenuation law, finally calculate electric discharge amplitude and strength of discharge in this time period, fault degree and electric discharge type are identified.

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.During off line data analysis, after historical data is called in, the image conversion that automatically carries out data analysis and result shows, completes data conversion storage, and data analysis is printed, generating report forms, pick-up unit shutdown.When fixed point detects: (1) start detection device, starts 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 the test parameter information such as observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, by cancel key EOP (end of program); (3) reading system clock, the store path of the record data that selection generates are set after end; (4) by eyepiece, aim at detected object, start automatic range and focusing, pick-up unit starts to detect identification, and the data after collection, after pulse signal processing, threshold filtering and peak value keep, in conjunction with detecting distance, are carried out data analysis demarcation; (5) wait data message show and store recognition result and detection distance.When described line walking detects: (1) start detection device, starts 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 the test parameter information such as observation place, observation unit, tested object, weather characteristics, temperature humidity, observation people and observed range, by cancel key EOP (end of program); (3) reading system clock, the store path of the record data that selection generates are set after end; By eyepiece, aim at detected object, start automatic range and focusing, pick-up unit starts to detect identification, and the data after collection are after pulse signal processing, threshold filtering and peak value keep, and in conjunction with detecting distance, selected data analysis is demarcated; (4) wait data message show and store recognition result and detection distance; Complete data conversion storage, data analysis is printed, generating report forms; (5) again carry out new detected object and aim at, start detection and data processing, data storage and the report generation of a new round, complete setting Detection task, 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, by optical laying eyepiece and optically focused camera lens and laser range finder, detect detected object distance, according to pulse strength, observed range, temperature, humidity and coefficient correction quantize, high-tension line pick-up unit is carried out to on-line analysis qualitative, quantitative, to corona, pull out electricity, spark, low baking temperature flower waits the high precision having realized based on ultraviolet photon to sort out digital quantization, output recognition result, make the data of corona detection more comprehensively reliable, be conducive to the assessment of corona discharge fault level and degree of discharge, there is direct processing, simple in structure, detection data are definite, response identification is fast, the 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 operation pick-up unit, can accomplish on-line monitoring, also not need other to detect analytical equipment and coordinate.Therefore, there is operating aspect, quickness and high efficiency, be not subject to the features such as weather effect.

3, the present invention can be equipped on patrolling and examining of automobile or helicopter enterprising line road.The fast response time detecting due to ultraviolet, when moving, still can complete monitoring task in tested pick-up unit and monitoring instrument, has not only greatly improved detection efficiency, and has reduced labour intensity.

4, the present invention has realized the ultraviolet radiation producing by tested corona and has carried out remote non-contact detection, and testing process is consuming time short, and result is accurate, does not need computing machine to process separately, can generating report forms database, and whole system is simple to operate, easy to carry.

Accompanying drawing explanation

Fig. 1 is workflow schematic diagram of the invention process;

User's operating process schematic diagram when Fig. 2 is the invention process;

Fig. 3 is the structural representation of the pick-up unit that uses in the present invention.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described with concrete enforcement;

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 aiming at the eyepiece of pick-up unit, aim at tested corona discharge position, obtain the ultraviolet signal of discharge generation, by the amplifying circuit in governor circuit in pick-up unit, the electric signal of Ultraviolet sensor output amplified and is converted to pulse voltage signal, and realizing impedance matching.

(2) pulse signal is processed: signal processing circuit return pulse signal in governor circuit, pulse signals is carried out after shaping, filtering processing, then is connected with pulsed frequency decision circuitry, by paired pulses frequency and pulsewidth, carries out discriminatory analysis.

(3) detect data scaling: by laser range finder, detect detected object distance, according to pulse strength, observed range, temperature, humidity and coefficient correction, quantize, high-tension line pick-up unit is carried out to on-line analysis qualitative, quantitative, 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) storage of detection data and analysis: Identification display result and detection distance on display screen, detection data are saved in storage card, supporting bus interface is dynamically output in real time, can on pick-up unit, carry out off-line and detect online data analysis and report generation.

Corona detection workflow of the present invention is: start detection device, starts 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, by cancel key EOP (end of program), enter next step; Reading system clock, the store path of the record data that selection generates are set after end; By eyepiece, aim at detected object, start automatic range and focusing; Detect pick-up unit and start to detect identification, data after collection are after pulse signal processing, threshold filtering and peak value keep, in conjunction with detecting distance, according to the classified statistic method of the ultraviolet light transducer pulsed frequency detecting and amplitude, come ultraviolet photon high-precision digital, realize the quantification of corona intensity and type and process with differentiation, enter data analysis and demarcate; Wait data message show and store recognition result and detection distance; Complete data conversion storage, data analysis is printed, generating report forms; Pick-up unit shutdown.Wherein, wherein classified statistic method comprises: the maximum amplitude of electric discharge in (1) statistics fixed time section; (2) in statistics setting-up time section, surpass the discharge time of certain threshold value; (3) calculate and show this time period interior electric discharge amplitude and detect the corresponding relation between distance.The pulse amplitude of described pulse voltage signal and discharge time statistics adopt software peak value keeping method, the time period that the need that the method is formulated according to user are analyzed and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, corresponding detection apart from ultraviolet attenuation law, finally calculate electric discharge amplitude and strength of discharge in this time period, fault degree and electric discharge type are identified.

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.During off line data analysis, after historical data is called in, the image conversion that automatically carries out data analysis and result shows, completes data conversion storage, and data analysis is printed, generating report forms, pick-up unit shutdown.

When fixed point detects, start detection device, starts 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, by cancel key EOP (end of program), enter next step; Reading system clock, the store path of the record data that selection generates are set after end; By eyepiece, aim at detected object, start automatic range and focusing; Detect pick-up unit and start to detect identification, the data after collection, after pulse signal processing, threshold filtering and peak value keep, in conjunction with detecting distance, are carried out data analysis demarcation; Wait data message show and store recognition result and detection distance; Complete data conversion storage, data analysis is printed, generating report forms; Pick-up unit shutdown.

When line walking detects, start detection device, starts 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, by cancel key EOP (end of program), enter next step; Reading system clock, the store path of the record data that selection generates are set after end; By eyepiece, aim at detected object, start automatic range and focusing; Detect pick-up unit and start to detect identification, the data after collection are after pulse signal processing, threshold filtering and peak value keep, and in conjunction with detecting distance, selected data analysis is demarcated; Wait data message show and store recognition result and detection distance; Complete data conversion storage, data analysis is printed, generating report forms; Again carry out new detected object and aim at, start detection and the data processing of a new round, data storage and report generation, complete setting Detection task, 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.Aim at eyepiece 2 and be arranged on housing 1 top, be focusing automatically in certain observation scope; Laser ranging module 3, is placed in housing 1, in the same axis vertical lower of eyepiece 2; In housing 1, be provided with by generating laser and circuit board, laser pickoff and circuit board thereof, laser ranging data is processed surface-mounted integrated circuit, and this module is connected with signal processing circuit, and each detection distance is analyzed.Ultraviolet optics camera lens 4, be arranged on housing 1 front end, be placed on the same axis vertical lower of laser ranging module 3, corresponding transmission wave band is 180~280nm, in this wavelength band, there is the purple rate of optical lens higher than 80%, 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 in optical lens focus, in detector detection module, added RC pulse driving circuit to detect ultraviolet radiation, adopt and periodically reduce anode voltage, make its method that maintains voltage lower than electric discharge prevent the self-sustaining of 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 is placed in housing 1 and is connected with ultraviolet light transducer 5 pulse output ends, the electric signal of Ultraviolet sensor 5 outputs is amplified and is converted to voltage signal, and realize impedance matching; Signal processing circuit wherein, be placed in housing 1 and be connected 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 5V or the power supply of 12V lithium battery module; Display module 9, being positioned at housing 1 side is connected 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 passes through front panel interface display to user by the result of data processing, allows user can obtain intuitively observed range and strength of discharge data.Storage card 10, is placed in housing 1, for record and preservation, detects data, supports online and off-line calling data and analysis.Bus interface 11, is placed in housing 1 rear end, supports the USB output of testing result, and another function of this interface is external power interface, for the components and parts in housing and circuit provide power supply.Power light 12 is arranged on housing 1, power light 12 green lights when detector is worked.Alarm lamp 13 is arranged on housing 1, when there being corona warning alarm pilot lamp 13 when reds.Operation push-button panel 14, this panel is positioned at housing display screen side, by panel, is arranged and is inquired about.

The analysis software that runs on pick-up unit terminal is comprised of three large modules, data acquisition module, data analysis module and data management module.For inspection work provides the interface that corona detection working method and state are set; Acquisition function to Ultraviolet sensor output signal is provided; Provide the preservation of original experimental data and read functions; Unloading and the read functions of the information off-line to extracting 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.During off line data analysis, after in storage card, historical data is called in, the graphical demonstration of Operational Data Analysis and result automatically; During on-line monitoring, the operations such as the initialization of advanced line correlation and hardware testing, then real-time data collection carries out analysis and the image conversion demonstration of data simultaneously, the online dynamically output of interface support.

Referring to Fig. 1 to Fig. 3, on operation push-button panel 14, set detected parameters, by adopting eyepiece 2 to aim at detected object, corona discharge gives off ultraviolet light, after the system of ultraviolet optics camera lens 4, focuses on ultraviolet light transducer 5.A pulse direct current high pressure of power-switching circuit 6 generations is added on ultraviolet light transducer 5 and makes its triggering work, and ultraviolet light transducer 5 is converted into electric signal by light signal.Ultraviolet light transducer 5 pulse outputs are connected with signal processing circuit with the amplifying circuit in governor circuit 7, after pulse receiving circuit, pulse shaping circuit, digital filter circuit pulse signals are carried out shaping, filtering processing, be connected with pulsed frequency decision circuitry again, by paired pulses frequency and pulsewidth, carry out discriminatory analysis.The amplitude of pulse and ultraviolet light intensity are directly proportional, the pulse waveform mode luminous with 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 electric discharge, can be used as the index of detection, by to the processing of these indexs and analysis, just can detect the strong and weak of faint corona discharge the harm of judgement to insulation.By laser ranging module 3, detect detected object distance, according to pulse strength, observed range, temperature, humidity and coefficient correction, quantize, high-tension line pick-up unit is carried out to on-line analysis qualitative, quantitative, 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 storage card 10, also supporting bus interface 11 dynamically output in real time.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and substitute and improvement etc., within all should being included in protection scope of the present invention.

Claims (1)

1. based on a ultraviolet photon corona detection method, it is characterized in that: its structure of the detecting device adopting comprises: housing, eyepiece, laser ranging module, ultraviolet optics camera lens, ultraviolet light transducer, power-switching circuit, governor circuit, power module, display module, storage card, bus interface, power light, alarm lamp and operation push-button panel, housing is rectangular or long tubular, and it is made for plastics or metal, eyepiece is arranged on housing top, is focusing automatically in certain observation scope, laser ranging module is placed in housing, in eyepiece axis vertical lower, by generating laser and circuit board, laser pickoff and circuit board thereof and laser ranging data, process surface-mounted integrated circuit and form, this module is connected with signal processing circuit, to each detection apart from analyzing, ultraviolet optics camera lens is arranged on housing front end, be placed on laser ranging module axis vertical lower, corresponding transmission wave band is 180~280nm, in this wavelength band, there is the purple rate of optical lens higher than 80%, aperture of lens diameter is 40~200mm, ultraviolet light transducer is placed on the focus place of ultraviolet optics camera lens, its response wave band is 180~280nm, its sensing detector is placed in ultraviolet optics camera lens focus, in sensing detector detection module, add RC pulse driving circuit to detect ultraviolet radiation, adopt and periodically reduce anode voltage, make its method that maintains voltage lower than electric discharge prevent the self-sustaining of discharge current, power-switching circuit carries out input voltage the high pressure that ultraviolet light transducer condition of work needs that converts to of DC/DC, governor circuit comprises amplifying circuit and signal processing circuit, and amplifying circuit is placed in housing and is connected with ultraviolet light transducer pulse output end, the electric signal of ultraviolet light transducer output is amplified and is converted to voltage signal, and realize impedance matching, wherein signal processing circuit is placed in housing and is connected 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 is positioned at housing, adopts 5V or the power supply of 12V lithium battery module, display module is positioned at housing side and is connected with power module with signal processing circuit, display module is shown to user by the result of data processing by housing display screen, allows user can obtain intuitively observed range and strength of discharge data, storage card is placed in housing, for record and preservation, detects data, supports online and off-line calling data and analysis, bus interface is placed in housing rear end, supports the USB output of testing result, and another function of this interface is external power interface, for the components and parts in housing and circuit provide power supply, power light is arranged on housing, power light green light when sensing detector is worked, alarm lamp is arranged on housing, when there being corona warning alarm pilot lamp when red, operation push-button panel is positioned at housing display screen side, by operation push-button panel, is arranged and is inquired about, described method comprises the steps:
(1) detect corona signal: by pick-up unit, obtain the ultraviolet signal of discharge generation, then electric signal is amplified and be converted to pulse voltage signal, realize impedance matching;
(2) pulse signal is processed: signal processing circuit received pulse voltage signal in the governor circuit of pick-up unit, pulse voltage signal is carried out after shaping, filtering processing, be connected with pulsed frequency decision circuitry again, by paired pulses frequency and pulsewidth, carry out discriminatory analysis;
(3) detect data scaling: by laser ranging module, detect detection distance, pick-up unit is carried out to on-line analysis qualitative, quantitative, 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 analyze: export recognition result and detect distance, and detection data are saved in storage card;
The operation steps flow process that described method is concrete is:
Start detection device, starts initialization apparatus after receiving order;
Time period, cache size, the threshold threshold value of sampling rate, collection are set, fill in test parameter information, comprise observation place, observation unit, detected object, weather characteristics, temperature humidity, observation people and observed range, by cancel key EOP (end of program), enter next step;
Reading system clock, the store path of the record data that selection generates are set after end;
By eyepiece, aim at detected object, by laser ranging module, detect detection distance, start automatic range and focusing;
Pick-up unit starts to detect identification, data after collection are after pulse signal processing, threshold filtering and peak value keep, in conjunction with detecting distance, according to the classified statistic method of the ultraviolet light transducer pulsed frequency detecting and amplitude, come ultraviolet photon high-precision digital, realizing the quantification of corona intensity and type processes with differentiation, enter data analysis and demarcate, wherein classified statistic method comprises: (a) maximum amplitude of electric discharge in statistics fixed time section; (b) in statistics fixed time section, surpass the discharge time of certain threshold value; (c) calculate and show this time period interior electric discharge amplitude and detect the corresponding relation between distance; The maximum amplitude of described electric discharge and discharge time statistics adopt software peak value keeping method, the time period that software peak value keeping method is analyzed according to the need of user's appointment and the sampled data of this time period, utilize comparing back and forth successively of counting and peak value, corresponding detection apart from ultraviolet attenuation law, finally calculate maximum amplitude and the strength of discharge of electric discharge in this time period, fault degree and electric discharge type are identified;
Recognition result and detection range data information are shown and stored;
Complete data conversion storage, data analysis is printed, generating report forms;
Pick-up unit shutdown.
CN201110096701.6A 2011-04-18 2011-04-18 Corona detection method based on ultraviolet photons CN102230952B (en)

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