CN104897776A - Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator - Google Patents
Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator Download PDFInfo
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Abstract
The invention discloses a vibration acoustic wave based charged flaw detection device and method for a porcelain post insulator. The device comprises a detecting device, an insulating bar and a background data management system, wherein the detecting device comprises a casing, an emitting probe and a receiving probe, wherein the emitting probe and the receiving probe are arranged at the upper end of the casing, a control circuit board is arranged in the casing, and a thread fixing hole is formed in the lower end of the casing; a screw rod is arranged at the upper end of the insulating bar and is spirally connected with the thread fixing hole; the background data management system is connected with the detecting device through the wireless network. A vibration load is applied to the porcelain post insulator, the vibration frequency of the porcelain post insulator is detected, accordingly, the complete detection function of the porcelain post insulator is realized, the problem of failure in charged detection is solved, the detection result is directly and effectively reflected in a vibration spectrogram form, and a large amount of labor and manpower is saved.
Description
Technical field
The present invention relates to a kind of insulator detection device and detection method, specifically a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave and method.
Background technology
Support insulator is the important composition equipment of generating plant and transformer station, is used in electric system in a large number, plays support wire, isolating switch and high-voltage switch gear effect.Porcelain strut insulator is wherein essential elements, and fracture accident takes place frequently in recent years, has a strong impact on the safe and stable operation of electrical network, and carrying out that prevention detects is the key reducing fracture accident.But the aging and inefficacy of pillar porcelain insulator is the process of a gradual change, Timeliness coverage problem is also not easy.But find not in time and process, power equipment just may be caused to break down, even cause paroxysmal electric power accident, causing huge direct and indirect economic loss.The working practice in many electric power enterprises and power station shows, the key of prevention is in insulator operational process, detect the defects such as the various crackle in its inside and outside and physical strength reduction in advance, testing result basis is taked corresponding remedial measures, avoids the generation of accident.
Porcelain strut insulator is by silicate original paper mixed configuration such as clay, feldspar, quartz, and after shaped, the inorganic insulating material at high temperature sintered into, primarily of the quartz particles composition be distributed in glassy substrate.Manufacture in the process of insulator, these particles suffer from the effect of drawing stress significantly, and this stress comes from the linear expansion coefficient that bi-material is different under appearing at the cooling situation after ceramic products calcining.Under action of such stresses, in quartz particles, their border grows micro-crack, this process in glassy substrate neutralization, even also finds expression on the porcelain insulator of high-quality to a certain extent.
Insulator crackle has and descends characteristic:
1) flaw size very little (such as, the surface crack degree of depth is 0.1mm, is distributed on the end flange face of insulator) just can make insulator damage;
2) crackle is difficult to prediction (can from a second to several years) from the length that it grows the damaged development time of porcelain product;
3) with the naked eye can not remove the underbead crack finding porcelain product, comprise and be positioned at the following crackle in insulator flange face, and with the naked eye go to find that surface crack is also very difficult.
4) there is additional stress when External Force Acting being subject to insulator, new particle is sustained damage, causes the growth of micro-crack great-jump-forward.
Current domestic in-service porcelain strut insulator inspection technique ubiquity the problems such as complicated operation, danger is high, equipment cost is high, therefore in the urgent need to developing a kind of simple, safety, economy, efficiently detection method.
Summary of the invention
In order to solve the problem, the invention provides a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave and method, it by applying oscillating load and detecting to realize the complete measuring ability to porcelain strut insulator to the vibration frequency of porcelain strut insulator on porcelain strut insulator, solution must not the problem of live detection, effectively reflect testing result by the formal intuition of rumble spectrum figure, save a large amount of manpower and materials.
The present invention solves the technical scheme that its technical matters takes: a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave, is characterized in that: comprise sniffer, insulating bar and data management system;
Described sniffer comprises housing, emitting probe and reception probe, and described emitting probe and reception probe are arranged on the upper end of housing, and be provided with control circuit board in described housing, the lower end of housing is provided with a threaded securing bores;
Described emitting probe comprises emitting probe housing and emitting probe head, and described emitting probe housing is enclosed within the outside of emitting probe head, and the rear end of described emitting probe head is fixed in emitting probe housing by elastomeric element; Be connected with control circuit board in the groove that described vibrator is fixed on the rear end of emitting probe head;
Described reception probe comprises reception probe housing and receives probe, and described reception probe housing is enclosed within the outside receiving probe, and the rear end of described reception probe is fixed on by elastomeric element and receives in probe housing; Described acceleration vibration transducer be fixed on receive probe rear end groove in and be connected with control circuit board;
The upper end of described insulating bar is provided with screw rod, and described screw rod is connected with threaded securing bores spiral;
Described data management system is connected with sniffer by Wi-Fi.
Preferably, described elastomeric element comprises spring, by at emitting probe with receive probe and arrange the elastomeric elements such as spring, emitting probe and receive the tip of probe and conflict insulator flange in the bottom support plate overexerts and cause emitting probe, receive probe or flange is destroyed when effectively preventing from detecting.
Preferably, the housing lower end of described sniffer is also provided with shift knob, reset button, USB interface, duty lamp and power light, and described shift knob, reset button, USB interface, duty lamp are connected with control circuit board respectively with power light.
Preferably, described insulating bar comprises more piece, and the mutual spiral of each joint connects or buckle connects, and can regulate the length of insulating bar, to meet the detection needs of differing heights insulator according to field condition.
Preferably, described wireless network comprises any one in 3G, 4G, CDMA, GSM, GPRS and WLAN Wi-Fi.
Preferably, described insulating bar is become by one or more in bakelite, bakelite, plastic tape and expoxy glass stringing.
Preferably, described control circuit board comprises CPU, wave filter, power amplifier, stepup transformer, signal amplifier, A/D change-over circuit, power module, storer and wireless module, and the output terminal of described CPU is connected with the input end of wave filter; The output terminal of described wave filter is connected with the input end of power amplifier, and the output terminal of described power amplifier is connected with the input end of stepup transformer, and the output terminal of described stepup transformer is connected with the input end of vibrator; The described output terminal of acceleration vibration transducer is connected with the input end of signal amplifier, and the output terminal of described signal amplifier is connected with the input end of A/D change-over circuit, and the described output terminal of A/D change-over circuit is connected with the input end of CPU; Described power module is connected with the feeder ear of CPU; Described storer is connected with CPU by data bus, and described wireless module is connected with the communication interface of CPU.
Preferably, described power module comprises battery, the upper surface of described housing is provided with battery case lid, the battery case be connected with control circuit board is installed at the inner surface of battery case lid, near the inner side battery case of upper surface, be provided with the hummer be connected with control circuit board.
Preferably, described data management system comprises the computing machine or notebook computer that are provided with spectrum analysis program, spectrum analysis program is utilized to carry out spectrum analysis to detection signal, the vibration frequency of porcelain strut insulator shown with the form of spectrogram, its detection method is simple, directly perceived, convenient.
Present invention also offers a kind of porcelain pillar insulator electrified method for detection fault detection based on vibration sound wave, it is characterized in that: comprise the following steps:
(1) porcelain pillar insulator electrified failure detector as above is adopted, the flange position bottom detected porcelain strut insulator that described sniffer is placed, and conflicted on insulator flange in the bottom support plate in the tip of emitting probe and reception probe, allow probe perpendicular to flange bottom as far as possible;
(2) drive vibrator to produce vibration signal, this vibration signal is applied on detected porcelain strut insulator and makes it that extensional vibration occur;
(3) acceleration vibration transducer receives the vibration echoed signal of detected porcelain strut insulator, and sending to control circuit board, control circuit board generates digital audio and video signals after carrying out digitized processing to signal and digital audio and video signals is sent the data to data management system by wireless module;
(4) data management system carries out spectrum analysis generation rumble spectrum figure to the digital audio and video signals received, and is compared by this rumble spectrum figure and insulator oscillation power spectral density evaluation figure and judges this porcelain strut insulator existing defects.
The invention has the beneficial effects as follows:
1, the present invention applies oscillating load by emitting probe to porcelain strut insulator, by receiving the vibration frequency of probe collection porcelain strut insulator and being stored in sniffer inside, can each porcelain strut insulator of batch capture vibration frequency and the data of collection are sent to the data management system being provided with spectrum analysis program, evaluated the rigid of porcelain strut insulator according to the rumble spectrum of porcelain strut insulator by data management system, this porcelain strut insulator existing defects is judged by being compared by the rumble spectrum figure of detection and insulator oscillation power spectral density evaluation figure, if this rumble spectrum figure is except the basic crest of frequency 4500 hertz, also has the flange in the bottom defectiveness then judging this insulator at the peak value in 1000-3000 hertz frequency region, if this rumble spectrum figure is except the basic crest of frequency 4500 hertz, also has the top flange defectiveness then judging this insulator at the peak value in 8000-10000 hertz frequency region, achieve fast, measuring ability accurately, the outer damage of porcelain strut insulator can not only be detected, also its inner damage occurred can be detected, its degree of injury and damage position can also be detected, achieve fast, accurately and batch detection function.
2, the present invention the disposable surface imperfection to porcelain strut insulator and inherent vice can make thoroughly evaluating online, in testing process, does not affect normal function of supplying power, improves detectability and detection efficiency.
3, sniffer of the present invention and insulating bar are threadedly installed together, and only need operate on the ground and can complete measuring ability, have feature easy to carry, simple to operate, reduce detected intensity, saved manpower and materials.
4, the vibration frequency of porcelain strut insulator shows with the form of spectrogram by the present invention, and its detection method is simple, directly perceived, convenient.
5, present invention achieves live detection, traditional detection to support insulator needs to carry out under power-off condition, detection efficiency is low, many times lack implementation condition, and the present invention utilizes vibroacoustics detection technique, carry out accurately and fast detecting to porcelain strut insulator at electriferous state, live detection is effectively avoided having a power failure and is brought economic loss, also eliminates the potential safety hazard in the past existed because the assay intervals time is longer.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is principle assumption diagram of the present invention;
Fig. 2 is the structural representation of sniffer of the present invention;
Fig. 3 is the structural representation of sniffer lower end of the present invention;
Fig. 4 is the structural representation of control circuit board of the present invention;
Fig. 5 is the structural representation of emitting probe of the present invention;
Fig. 6 is the structural representation of reception probe of the present invention;
Fig. 7 is the structural representation of insulating bar of the present invention;
Fig. 8 be 220KV porcelain strut insulator in good condition time rumble spectrum figure;
Fig. 9 be 110KV porcelain strut insulator in good condition time rumble spectrum figure;
Rumble spectrum figure when Figure 10 is flange in the bottom defectiveness (crackle be can't see in inside) of 220KV porcelain strut insulator;
Figure 11 is the rumble spectrum figure that the flange in the bottom place of 220KV porcelain strut insulator occurs when rupturing (during switching over, insulator is broken);
Figure 12 be 220KV porcelain strut insulator flange in the bottom on rumble spectrum figure when there is fracture (during power-off upper end insulator broken);
Rumble spectrum figure when Figure 13 is the flange in the bottom region defectiveness of 110KV porcelain strut insulator;
Figure 14 is the rumble spectrum figure that the flange in the bottom region of 110KV porcelain strut insulator occurs when rupturing;
Figure 15 is the upper flange region of 110KV porcelain strut insulator rumble spectrum figure when having a crackle;
Rumble spectrum figure when Figure 16 is the upper flange region defectiveness of 110KV porcelain strut insulator;
Figure 17 is the oscillation power spectral density linear scale evaluation figure of 110KV porcelain strut insulator;
Figure 18 is the oscillation power spectral density log scale evaluation figure of 110KV porcelain strut insulator;
In figure, 1 housing, 2 emitting probes, 21 emitting probe housings, 22 emitting probe heads, 23 elastomeric elements, 24 vibrators, 3 receive probe, 31 and receive probe housing, 32 reception probe, 33 elastomeric elements, 34 acceleration vibration transducers, 4 threaded securing bores, 5 shift knobs, 6 reset button, 7USB interface, 8 duty lamps, 9 power lights, 10 battery case lids.
Embodiment
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.It should be noted that parts illustrated in the accompanying drawings are not necessarily drawn in proportion.Present invention omits the description of known assemblies and treatment technology and process to avoid unnecessarily limiting the present invention.
As shown in Figure 1, a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave of the present invention, comprise sniffer, insulating bar and data management system, described data management system is connected with sniffer by Wi-Fi.Described wireless network adopt in 3G, 4G, CDMA, GSM, GPRS and WLAN Wi-Fi any one, realized the on-line checkingi of porcelain pillar insulator electrified flaw detection by wireless transmission method.Described data management system comprises the computing machine or notebook computer that are provided with spectrum analysis program.
As shown in Figures 2 and 3, sniffer of the present invention comprises housing 1, emitting probe 2 and receives probe 3, described emitting probe 2 and reception probe 3 are arranged on the upper end of housing 1, and be provided with control circuit board in described housing, the lower end of housing is provided with a threaded securing bores 4; Housing 1 lower end of described sniffer is also provided with shift knob 5, reset button 6, USB interface 7, duty lamp 8 and power light 9, and described shift knob 5, reset button 6, USB interface 7, duty lamp 8 are connected with control circuit board respectively with power light 9.The present invention can carry out offline inspection by USB interface and the notebook computer being provided with spectrum analysis program, first porcelain strut insulator is detected, then the detection signal data that sniffer stores are sent to notebook computer by USB interface, finally by notebook computer, this porcelain strut insulator existing defects is then judged to the detection signal data analysis process received.
As shown in Figure 4, described control circuit board comprises CPU, wave filter, power amplifier, stepup transformer, signal amplifier, A/D change-over circuit, power module, storer and wireless module, and the output terminal of described CPU is connected with the input end of wave filter; The output terminal of described wave filter is connected with the input end of power amplifier, and the output terminal of described power amplifier is connected with the input end of stepup transformer, and the output terminal of described stepup transformer is connected with the input end of vibrator; The described output terminal of acceleration vibration transducer is connected with the input end of signal amplifier, and the output terminal of described signal amplifier is connected with the input end of A/D change-over circuit, and the described output terminal of A/D change-over circuit is connected with the input end of CPU; Described power module is connected with the feeder ear of CPU; Described storer is connected with CPU by data bus, and described wireless module is connected with the communication interface of CPU.
As shown in Figure 5, described emitting probe 2 comprises emitting probe housing 21 and emitting probe head 22, and described emitting probe housing 21 is enclosed within the outside of emitting probe head 22, and the rear end of described emitting probe head 22 is fixed in emitting probe housing 21 by elastomeric element 23; Be connected with control circuit board in the groove that described vibrator 24 is fixed on the rear end of emitting probe head, described elastomeric element 23 adopts spring.
As shown in Figure 6, described reception probe 3 comprises reception probe housing 31 and receives probe 32, and described reception probe housing 31 is enclosed within the outside receiving probe 32, and the rear end of described reception probe 32 is fixed on by elastomeric element 33 and receives in probe housing 31; Described acceleration vibration transducer 34 be fixed on receive probe rear end groove in and be connected with control circuit board, described elastomeric element 33 adopts spring.
As shown in Figure 7, the upper end of described insulating bar is provided with screw rod, and described screw rod is connected with threaded securing bores spiral.Described insulating bar comprises more piece, and the mutual spiral of each joint connects or buckle connects.Described insulating bar is become by one or more in bakelite, bakelite, plastic tape and expoxy glass stringing.
As shown in Figure 3, described power module comprises battery, the upper surface of described housing is provided with battery case lid 10, the battery case be connected with control circuit board is installed at the inner surface of battery case lid, near the inner side battery case of upper surface, be provided with the hummer be connected with control circuit board.
Of the present invention a kind of based on vibration sound wave porcelain pillar insulator electrified method for detection fault detection it comprise the following steps:
(1) porcelain pillar insulator electrified failure detector as above is adopted, the flange position bottom detected porcelain strut insulator that described sniffer is placed, and conflicted on insulator flange in the bottom support plate in the tip of emitting probe and reception probe, allow probe perpendicular to flange bottom as far as possible;
(2) drive vibrator to produce vibration signal, this vibration signal is applied on detected porcelain strut insulator and makes it that extensional vibration occur; Applying the process of vibration signal is that first to produce frequency range by the CPU of control circuit board be the vibration signal of 10Khz, then sine wave signal is produced after filtering being carried out to vibration signal by wave filter, finally being amplified by sine wave signal by power amplifier and send vibrator to, is the oscillating load of 10Khz by the vibrator generation frequency range be applied on detected porcelain strut insulator;
(3) acceleration vibration transducer receives the vibration echoed signal of detected porcelain strut insulator, and sending to control circuit board, control circuit board generates digital audio and video signals after carrying out digitized processing to signal and digital audio and video signals is sent the data to data management system by wireless module;
(4) data management system carries out spectrum analysis to the digital audio and video signals received, namely Fourier transform is carried out to digital audio and video signals and generate rumble spectrum figure, this rumble spectrum figure and insulator oscillation power spectral density evaluation figure is compared and judges this porcelain strut insulator existing defects, if this rumble spectrum figure is except the basic crest of frequency 4500 hertz, also has the flange in the bottom defectiveness then judging this insulator at the peak value in 1000-3000 hertz frequency region, if this rumble spectrum figure is except the basic crest of frequency 4500 hertz, also has the top flange defectiveness then judging this insulator at the peak value in 8000-10000 hertz frequency region.
As shown in Fig. 8 to Figure 18, the decision process of porcelain strut insulator existing defects is as follows:
Do not depart from the insulator that technological process requires to manufacture, have the single-peaked oscillation power spectral density evaluation figure in frequency 4500 hertz of regions, as Fig. 8, Fig. 9, shown in Figure 17 and Figure 18.
The insulator at end flange defectiveness (damage), on oscillation power spectral density figure, except basic (conclusive) peak of frequency 4500 He Zhi, also has the peak value at 1000-3000 He Zhi frequency field, as shown in Figure 10, Figure 11, Figure 12, Figure 13 and Figure 14.
The insulator of top flange defectiveness (damage), on oscillation power spectral density figure, except basic (conclusive) peak of frequency 4500 He Zhi, also has the peak value at 8000-10000 He Zhi frequency field, as shown in Figure 15 and Figure 16.
Adopt linear scale and log scale to analyze further data by the evaluation figure shown in Figure 17 and Figure 18, the trend of development of defects in insulator can be found out.
When carrying out porcelain pillar insulator electrified carrying out flaw detection, testing staff passes through the threaded securing bores of sniffer housing lower end by sniffer installing insulating bar, the hand-held insulating bar of testing staff is adjacent on the lower flange support plate of porcelain strut insulator to be measured by vertical with the tip receiving probe for emitting probe, and keep this state a period of time, sniffer is started working under the control of control circuit board CPU, and completing whole test process: CPU produces vibration signal on the one hand, filtering process is carried out by wave filter, carry out signal amplification and boosting, control vibrator and produce oscillating load, gathered the vibration frequency of porcelain strut insulator on the other hand by acceleration vibration transducer, generate digital audio and video signals after digitized processing is carried out by signal amplifier and A/D change-over circuit to this vibration frequency and digital audio and video signals is stored in memory.The digital audio and video signals be stored in sniffer sends to the data management system being provided with spectrum analysis program by wireless module, generate rumble spectrum figure after utilizing spectrum analysis program to carry out Fourier transform to this digital audio and video signals by data management system, this porcelain strut insulator whether existing defects can be judged intuitively by the rumble spectrum figure generated.
The present invention passes through to porcelain strut insulator bottom emission special incentive vibration wave, receive its vibrational feedback ripple simultaneously, whether the frequency spectrum through this feedback waveform of spectrum analysis program software automatic analysis is normal, can judge whether have crackle inside and outside this insulator, the general position of crackle, whether physical strength reduces or loses, and the defect such as whether insulator aging, by the accuracy that porcelain strut insulator is detected a flaw, security, practicality, high efficiency rises to new height, achieve the live detection of porcelain strut insulator crackle, solving conventional insulators detection method can not the problem of live detection, and effectively reflect testing result by the formal intuition of rumble spectrum figure, a large amount of manpower and materials are saved.Of the present inventionly apply the generation can avoiding causing major accident phenomenon because insulator fractures.
The above is the preferred embodiment of the present invention, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also regarded as protection scope of the present invention.
Claims (10)
1., based on a porcelain pillar insulator electrified failure detector for vibration sound wave, it is characterized in that: comprise sniffer, insulating bar and data management system;
Described sniffer comprises housing, emitting probe and reception probe, and described emitting probe and reception probe are arranged on the upper end of housing, and be provided with control circuit board in described housing, the lower end of housing is provided with a threaded securing bores;
Described emitting probe comprises emitting probe housing and emitting probe head, and described emitting probe housing is enclosed within the outside of emitting probe head, and the rear end of described emitting probe head is fixed in emitting probe housing by elastomeric element; Be connected with control circuit board in the groove that described vibrator is fixed on the rear end of emitting probe head;
Described reception probe comprises reception probe housing and receives probe, and described reception probe housing is enclosed within the outside receiving probe, and the rear end of described reception probe is fixed on by elastomeric element and receives in probe housing; Described acceleration vibration transducer be fixed on receive probe rear end groove in and be connected with control circuit board;
The upper end of described insulating bar is provided with screw rod, and described screw rod is connected with threaded securing bores spiral;
Described data management system is connected with sniffer by Wi-Fi.
2. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, is characterized in that: described elastomeric element comprises spring.
3. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, it is characterized in that: the housing lower end of described sniffer is also provided with shift knob, reset button, USB interface, duty lamp and power light, and described shift knob, reset button, USB interface, duty lamp are connected with control circuit board respectively with power light.
4. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, is characterized in that: described insulating bar comprises more piece, and the mutual spiral of each joint connects or buckle connects.
5. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, is characterized in that: described wireless network comprise in 3G, 4G, CDMA, GSM, GPRS and WLAN Wi-Fi any one.
6. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, is characterized in that: described insulating bar is become by one or more in bakelite, bakelite, plastic tape and expoxy glass stringing.
7. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 1, it is characterized in that: described control circuit board comprises CPU, wave filter, power amplifier, stepup transformer, signal amplifier, A/D change-over circuit, power module, storer and wireless module, and the output terminal of described CPU is connected with the input end of wave filter; The output terminal of described wave filter is connected with the input end of power amplifier, and the output terminal of described power amplifier is connected with the input end of stepup transformer, and the output terminal of described stepup transformer is connected with the input end of vibrator; The described output terminal of acceleration vibration transducer is connected with the input end of signal amplifier, and the output terminal of described signal amplifier is connected with the input end of A/D change-over circuit, and the described output terminal of A/D change-over circuit is connected with the input end of CPU; Described power module is connected with the feeder ear of CPU; Described storer is connected with CPU by data bus, and described wireless module is connected with the communication interface of CPU.
8. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to claim 7, it is characterized in that: described power module comprises battery, the upper surface of described housing is provided with battery case lid, the battery case be connected with control circuit board is installed at the inner surface of battery case lid, near the inner side battery case of upper surface, is provided with the hummer be connected with control circuit board.
9. a kind of porcelain pillar insulator electrified failure detector based on vibration sound wave according to any one of claim 1 to 8, is characterized in that: described data management system comprises the computing machine or notebook computer that are provided with spectrum analysis program.
10., based on a porcelain pillar insulator electrified method for detection fault detection for vibration sound wave, it is characterized in that: comprise the following steps:
(1) porcelain pillar insulator electrified failure detector as claimed in claim 1 is adopted, the flange position bottom detected porcelain strut insulator that described sniffer is placed, and conflicted on insulator flange in the bottom support plate in the tip of emitting probe and reception probe, allow probe perpendicular to flange bottom as far as possible;
(2) drive vibrator to produce vibration signal, this vibration signal is applied on detected porcelain strut insulator and makes it that extensional vibration occur;
(3) acceleration vibration transducer receives the vibration echoed signal of detected porcelain strut insulator, and sending to control circuit board, control circuit board generates digital audio and video signals after carrying out digitized processing to signal and digital audio and video signals is sent the data to data management system by wireless module;
(4) data management system carries out spectrum analysis generation rumble spectrum figure to the digital audio and video signals received, and is compared by this rumble spectrum figure and insulator oscillation power spectral density evaluation figure and judges this porcelain strut insulator existing defects.
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| CN111766031A (en) * | 2020-07-08 | 2020-10-13 | 国网上海市电力公司 | Vibration excitation head for vibration acoustic detection in power industry |
| CN113340991A (en) * | 2021-06-21 | 2021-09-03 | 海南电网有限责任公司乐东供电局 | Vibration acoustic detection device for porcelain post insulator |
| CN113835004A (en) * | 2021-09-06 | 2021-12-24 | 太仓阿尔法数字科技有限公司 | Remote flaw detection method for in-service insulator |
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