CN205562415U - Benzvalene form insulator crack detection appearance based on fiber grating - Google Patents
Benzvalene form insulator crack detection appearance based on fiber grating Download PDFInfo
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- CN205562415U CN205562415U CN201620302933.0U CN201620302933U CN205562415U CN 205562415 U CN205562415 U CN 205562415U CN 201620302933 U CN201620302933 U CN 201620302933U CN 205562415 U CN205562415 U CN 205562415U
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- 239000000835 fiber Substances 0.000 title claims abstract description 88
- 239000012212 insulator Substances 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 title abstract 3
- 208000037656 Respiratory Sounds Diseases 0.000 claims abstract description 42
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims description 9
- 238000005336 cracking Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses a benzvalene form insulator crack detection appearance based on fiber grating, characterized by detector include broadband laser ware, series connection six fiber grating, fiber grating demodulation module, AD sampling and the processor module on an optic fibre, six fiber grating s of series connection on an optic fibre paste the round along the periphery of benzvalene form insulator, and optic fibre one end inserts the broadband laser ware, and the other end meets fiber grating demodulation module, and fiber grating demodulation module's output signal inserts AD sampling and processor module, and the AD sampling utilizes the AD sample thief to obtain sample data with processor module to it judges to utilize the treater to carry out the signal to sample data, detect the detection of realization to the crackle through the change to six fiber grating center wavelength.
Description
Technical field
The utility model relates to disc insulator crack detection technical field, more specifically a kind of disc insulator crackle on-line measuring device.
Background technology
For the crack detection of disc insulator, the detection especially for crackle is extremely difficult, currently mainly has ultrasonic and ultra-high-frequency detection method.
Ultrasound detection be by ultrasound echo signal detection crackle whether exist, this detection method has certain limitation, and the diameter of disc insulator is bigger, ultrasonic interior insulator decay quickly, the ultrasonic whole insulator of very difficult transmission, therefore detect the most comprehensive.
Hyperfrequency is the crackle by the detection of shelf depreciation comes indirect detection disc insulator, in time there is crackle in disc insulator, high-tension electricity can produce electric spark at crack position, i.e. produce partial discharge phenomenon, shelf depreciation can produce high-frequency signal, i.e. can detect that the crackle of disc insulator by catching this high-frequency signal.The method there is also certain limitation, under actual motion environment, along with insulation degradation, has the simultaneous situation of multiple discharge type, needs to explore how to separate the unlike signal tested.Outer sensor is placed on on-the-spot disc insulator device external when testing, and without good shield effectiveness, the signal received can be affected by outside electromagnetic interference, and is difficult to carry out long-term stationary monitoring.Many electric discharges within disc insulator are not long-time existence, can cause the electric discharge over the ground of breaker while there is electric discharge, and the seizure of local discharge signal is extremely difficult.Conventional substantial amounts of research shows, current detection still cannot determine the Apparent discharge magnitude of device interior fault, but for the shelf depreciation of detection equipment, the size of Apparent discharge magnitude is almost indispensable standard, also determines that the standard of the apparatus insulated situation order of severity.
Utility model content
The utility model is for avoiding the weak point existing for above-mentioned prior art, it is provided that a kind of can be with the disc insulator crackle detecting instrument based on fiber grating of the fine crack of on-line checking disc insulator.
The utility model adopts the following technical scheme that for solving technical problem
The utility model disc insulator based on fiber grating crackle detecting instrument be structurally characterized in that six fiber gratings, fiber grating demodulation module, A/D sampling and the processor module that described detector includes wideband laser, is connected on an optical fiber；Described six fiber gratings being connected on an optical fiber paste a circle along the periphery of disc insulator, described optical fiber one end access band laser instrument, the other end connects fiber grating demodulation module, the output signal of described fiber grating demodulation module accesses A/D sampling and processor module, described A/D sampling and processor module utilize A/D sampler to obtain the sampled data through data conversion, and utilize processor that described sampled data is carried out signal judgement；
When disc insulator causes it to crack due to technique, pressure, the reason of shelf depreciation, the stress wave propagation that cracking moment produces is to the external diameter surface of disc insulator, and affect refractive index and the cycle of fiber grating, thus change the centre wavelength of fiber grating；The detection to crackle is realized by the change of six fiber bragg grating center wavelengths being carried out detection.
The design feature of the utility model disc insulator based on fiber grating crackle detecting instrument lies also in: arranging described six fiber grating offices on the position that described disc insulator periphery is different, the time detected according to each fiber grating and signal strength signal intensity judge position and the intensity of crackle.
The design feature of the utility model disc insulator based on fiber grating crackle detecting instrument lies also in: arranges described six fiber gratings and mutually has different centre wavelength, six fiber gratings are equidistantly distributed in the periphery of disc insulator, use wavelength-division multiplex principle to the signal demodulation respectively of each fiber grating, determine crackle region according to the wavelength shift of different fiber gratings.
The design feature of the utility model disc insulator based on fiber grating crackle detecting instrument lies also in: utilize processor that described sampled data is carried out signal judgement, calculate the side-play amount of the centre wavelength obtaining fiber grating, and the shift time of centre wavelength, generation position, time and the cracking degree of crackle of crackle is determined according to side-play amount and shift time.
Compared with the prior art, the utility model has the beneficial effect that:
When disc insulator causes it to crack due to adaptability to changes, temperature, pressure, the reason of shelf depreciation, the stress wave that cracking moment produces can travel to the external diameter surface of disc insulator, thus have impact on refractive index and the cycle of fiber grating, and then change the centre wavelength of fiber grating, the utility model is by the detection changing six fiber bragg grating center wavelengths, detect the generation of crackle, and position and the intensity of crackle can be judged according to the time and intensity detected of different fiber gratings.Can be used for the fine crack of on-line checking disc insulator, its simple in construction, detection method are simple and reliable
Accompanying drawing explanation
Fig. 1 is system block diagram of the present utility model；
Fig. 2 is the stress wave schematic diagram during generation of disc insulator crackle；
Fig. 3 is A/D sampling and processor module theory diagram in the utility model；
Fig. 4 is the crack detection algorithm flow chart applied in the utility model；
Detailed description of the invention
See Fig. 1 and Fig. 2, six fiber gratings, fiber grating demodulation module, A/D sampling and the processor module that in the present embodiment, disc insulator crackle detecting instrument based on fiber grating includes wideband laser, is connected on an optical fiber；Six fiber gratings being connected on an optical fiber paste a circle along the periphery of disc insulator, optical fiber one end access band laser instrument, the other end connects fiber grating demodulation module, the output signal of fiber grating demodulation module accesses A/D sampling and processor module, A/D sampling and processor module utilize A/D sampler to obtain the sampled data through data conversion, and utilize processor that sampled data is carried out signal judgement；
When disc insulator causes it to crack due to technique, pressure, the reason of shelf depreciation, the stress wave propagation that cracking moment produces is to the external diameter surface of disc insulator, and affect refractive index and the cycle of fiber grating, thus change the centre wavelength of fiber grating；The detection to crackle is realized by the change of six fiber bragg grating center wavelengths being carried out detection.
In being embodied as, arranging six fiber grating offices on the position that disc insulator periphery is different, the time detected according to each fiber grating and signal strength signal intensity judge position and the intensity of crackle.Six fiber gratings are set mutually there is different centre wavelength, six fiber gratings are equidistantly distributed in the periphery of disc insulator, use wavelength-division multiplex principle to the signal demodulation respectively of each fiber grating, determine crackle region according to the wavelength shift of different fiber gratings.
Utilize processor that sampled data carries out signal judgement, calculate the side-play amount of the centre wavelength obtaining fiber grating, and the shift time of centre wavelength, determine generation position, time and the cracking degree of crackle of crackle according to side-play amount and shift time.
Cleaning Principle: six shown in Fig. 1 and Fig. 2 fiber grating is the first fiber grating the 1, second fiber grating the 2, the 3rd fiber grating the 3, the 4th fiber grating the 4, the 5th fiber grating 5 and six fibers grating 6 successively；Six fibers grating each has different centre wavelength, the light that wideband laser sends optical signal of six centre wavelengths through fiber grating time is launched, and can obtain six centre wavelength numerical value through fiber grating demodulation module, A/D sampling with signal processor module.When disc insulator 7 has crackle to produce time, crackle sends stress wave can be transferred to fiber grating, as in figure 2 it is shown, be stressed wave action, fiber bragg grating center wavelength can produce change, can substantially determine Crack Strength and crack position according to this change.Crack Strength is the biggest, and centre wavelength changes the biggest；From the fiber grating that crackle is nearest, fiber bragg grating center wavelength changes maximum, can substantially infer crack position accordingly.
See Fig. 3, A/D sampling is that the analog signal utilizing charge amplifier to export fiber grating demodulation module is amplified with signal processor module, noise signal is filtered by the first wave filter, recycling programmable amplifier is amplified, the multiplication factor of programmable amplifier can carry out exterior arrangement by button, amplitude according to analog signal sets multiplication factor, makes A/D sampler can carry out full scale sampling；Amplifying signal and filtered acquisition A/D sampled signal in the second wave filter again, single-chip microcomputer STM32, as signal processor, utilizes signal processor that the data gathered are calculated and processed, and result shows in a lcd display.
See Fig. 4, the flow process of crack detection algorithm is as follows: first carry out A/D sampling, sampled data compares with the threshold value preset, if sampled data is less than the threshold value preset, it is judged as that sampled data is external disturbance signal, it it is not disc insulator Signal of Cracks, if sampled data is more than the threshold value preset, the most experimental empirical value judges Crack Strength, the relatively size of the deviant of the centre wavelength of six fiber gratings, the grating of deviant maximum is nearest from crackle, deviant minimum fiber grating is farthest from crackle, draw the approximate location of disc insulator crackle in LCD screen according to result of calculation, and determine whether alarm according to Crack Strength.
Claims (4)
1. a disc insulator crackle detecting instrument based on fiber grating, is characterized in that six fiber gratings, fiber grating demodulation module, A/D sampling and processor module that described detector includes wideband laser, is connected on an optical fiber；Described six fiber gratings being connected on an optical fiber paste a circle along the periphery of disc insulator, described optical fiber one end access band laser instrument, the other end connects fiber grating demodulation module, the output signal of described fiber grating demodulation module accesses A/D sampling and processor module, described A/D sampling and processor module utilize A/D sampler to obtain sampled data, and utilize processor that described sampled data is carried out signal judgement；
When disc insulator causes it to crack due to technique, pressure, the reason of shelf depreciation, the stress wave propagation that cracking moment produces is to the external diameter surface of disc insulator, and affect refractive index and the cycle of fiber grating, thus change the centre wavelength of fiber grating；The detection to crackle is realized by the change of six fiber bragg grating center wavelengths being carried out detection.
Disc insulator crackle detecting instrument based on fiber grating the most according to claim 1, it is characterized in that: arranging described six fiber grating offices on the position that described disc insulator periphery is different, the time detected according to each fiber grating and signal strength signal intensity judge position and the intensity of crackle.
Disc insulator crackle detecting instrument based on fiber grating the most according to claim 2, it is characterized in that: described six fiber gratings are set mutually there is different centre wavelength, six fiber gratings are equidistantly distributed in the periphery of disc insulator, use wavelength-division multiplex principle to the signal demodulation respectively of each fiber grating, determine crackle region according to the wavelength shift of different fiber gratings.
Disc insulator crackle detecting instrument based on fiber grating the most according to claim 3, it is characterized in that: utilize processor that described sampled data is carried out signal judgement, calculate the side-play amount of the centre wavelength obtaining fiber grating, and the shift time of centre wavelength, generation position, time and the cracking degree of crackle of crackle is determined according to side-play amount and shift time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302933.0U CN205562415U (en) | 2016-04-12 | 2016-04-12 | Benzvalene form insulator crack detection appearance based on fiber grating |
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| CN201620302933.0U CN205562415U (en) | 2016-04-12 | 2016-04-12 | Benzvalene form insulator crack detection appearance based on fiber grating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717129A (en) * | 2016-04-12 | 2016-06-29 | 国家电网公司 | Basin-type insulator crack detector based on fiber gratings |
| CN109060546A (en) * | 2018-08-29 | 2018-12-21 | 西安交通大学 | It is a kind of using optical-fibre needle to the strain gauge means and method of the disc insulator water pressure test |
-
2016
- 2016-04-12 CN CN201620302933.0U patent/CN205562415U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717129A (en) * | 2016-04-12 | 2016-06-29 | 国家电网公司 | Basin-type insulator crack detector based on fiber gratings |
| CN109060546A (en) * | 2018-08-29 | 2018-12-21 | 西安交通大学 | It is a kind of using optical-fibre needle to the strain gauge means and method of the disc insulator water pressure test |
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