CN221100506U

CN221100506U - Insulator detection device

Info

Publication number: CN221100506U
Application number: CN202322365565.7U
Authority: CN
Inventors: 张耀辰
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-06-07
Anticipated expiration: 2033-08-31

Abstract

The application provides an insulator detection device, comprising: base, laser instrument, photoelectric sensor, data acquisition card and computer. The base is provided with a computer mounting seat, a rotatable laser mounting seat and a rotatable photoelectric sensor mounting seat; the computer can be installed on the computer installation seat, the laser can be installed on the laser installation seat, and the photoelectric sensor can be installed on the photoelectric sensor installation seat; after the rotatable laser mounting seat rotates, the emitting end of the laser can face the insulator to be tested; after the rotatable photoelectric sensor mounting seat rotates, the receiving end of the photoelectric sensor faces the laser beam reflected by the insulator to be tested; the output end of the photoelectric sensor is in signal connection with the input end of the data acquisition card; the output end of the data acquisition card is connected with a computer signal. Therefore, the insulator detection device simplifies the structure of the insulator detection device and improves the insulator detection efficiency.

Description

Insulator detection device

Technical Field

The application relates to the technical field of insulator detection, in particular to an insulator detection device.

Background

The insulator is used as a special insulation control in the overhead transmission line, can withstand voltage and mechanical stress, and plays an important role in the overhead transmission line. According to different insulating materials, the insulators comprise porcelain insulators, glass insulators and composite insulators, and each insulator has different advantages and disadvantages. For example, in the use process of the porcelain insulator, stress is generated inside, so that cracks appear or the outside is damaged or broken by hail and the like, and the porcelain insulator is damaged or the performance is reduced. Therefore, the insulator needs to be periodically checked to determine whether it can function properly. However, since the insulator is generally installed on an overhead transmission line, the insulator needs to climb on a tower of 50 meters or more for manual maintenance, the construction of workers is difficult, and the risk coefficient is high.

For this reason, patent No. CN108562653a discloses a post porcelain insulator detection device and detection method based on laser induced vibration, and the disclosure scheme is as follows: the device comprises a pulse laser, a lens system, an ultrasonic receiving system and a computer; the pulse laser emits pulse laser, the pulse laser is firstly divided into two beams of light by the lens system, one beam of light enters the photoelectric detector, the data acquisition card, the signal data device and the computer after being attenuated and focused, and an ultrasonic signal is obtained and is used as a reference signal to improve the detection accuracy of the pillar porcelain insulator. The other beam of light is incident on the surface of the pillar porcelain insulator, so that the porcelain insulator generates an ultrasonic signal, the ultrasonic signal is transmitted from the porcelain insulator until being transmitted to the self-adaptive laser interferometer on the ground, then the ultrasonic signal sequentially enters the photoelectric detector, the data acquisition card, the signal data device and the computer to obtain a signal to be detected, the computer compares the obtained signal to be detected with a reference signal, judges whether the pillar porcelain insulator has a defect, and judges the position and the characteristic of the defect.

From the above, some porcelain insulator detection technologies exist at present, the manual detection mode can be changed into a detection method combining manual detection with mechanical detection, but the optical path system and the circuit system of the detection system have complex structures, so that the cost is high, the error rate is high due to the complex structures, and the inaccurate detection is caused.

Disclosure of utility model

The present application provides an insulator detection device for solving the problems of the prior art.

The application provides an insulator detection device, comprising: the device comprises a base, a laser, a photoelectric sensor, a data acquisition card and a computer;

The base is provided with a computer mounting seat, a rotatable laser mounting seat and a rotatable photoelectric sensor mounting seat; the computer can be installed on the computer installation seat, the laser can be installed on the laser installation seat, and the photoelectric sensor can be installed on the photoelectric sensor installation seat;

after the rotatable laser mounting seat rotates, the emitting end of the laser can face the insulator to be tested;

after the rotatable photoelectric sensor mounting seat rotates, the receiving end of the photoelectric sensor faces the laser beam reflected by the insulator to be tested;

the output end of the photoelectric sensor is in signal connection with the input end of the data acquisition card;

And the output end of the data acquisition card is connected with the computer through signals.

Optionally, a sighting telescope is arranged on the transmitting end of the laser in front.

Optionally, a first laser filter is arranged in front of the receiving end of the photoelectric sensor.

Optionally, the insulator detection device further includes a vibration sensor and a rotatable vibration sensor mounting seat disposed on the base, the vibration sensor may be mounted on the vibration sensor mounting seat, when the vibration sensor mounting seat rotates, a receiving end of the vibration sensor may face the laser beam reflected by the insulator to be detected, and an output end of the vibration sensor is in signal connection with the data acquisition card.

Optionally, a second laser filter is arranged in front of the receiving end of the vibration sensor.

Optionally, the laser is a pulsed laser.

Optionally, the base is configured to accommodate a cavity structure.

The insulator detection device provided by the application comprises a base, a laser, a photoelectric sensor, a data acquisition card and a computer. The base is used for installing a computer installation seat, a rotatable laser installation seat and a rotatable photoelectric sensor installation seat. The laser is used for emitting laser, and the light beam irradiates on the insulator; the insulator absorbs part of the laser and re-reflects the laser beam, and the reflected laser beam is received by the photoelectric sensor; the photoelectric sensor receives the reflected laser beam, converts the reflected laser beam into an electric signal and transmits the electric signal to the data acquisition card; the data acquisition card converts the received information into data information and transmits the data information to the computer, and the computer analyzes and processes the obtained data. According to the insulator detection device, the laser, the photoelectric sensor, the data acquisition card and the computer are matched to obtain the frequency spectrum of laser reflected by the insulator in the current state, so that the insulator is detected; compared with the insulator detection device in the prior art, the insulator detection device comprises a pulse laser, a spectroscope, an attenuation sheet, a first lens, a first photoelectric detector, a second lens, a self-adaptive laser interferometer, a second photoelectric detector, a data acquisition card, a signal processor and a computer, and has the advantages of complex structure, more processes and higher error rate; the insulator detection device provided by the application has the advantages that the structure is simple, the detection process is also simple, the error rate is low, and the detection efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an insulator detection device according to an embodiment of the present application;

Fig. 2 is a logic schematic diagram of an insulator detection device according to another embodiment of the present application;

FIG. 3 is a schematic diagram of an insulator detection device according to another embodiment of the present application;

fig. 4 is a flowchart of an insulator detection method according to another embodiment of the present application;

Fig. 5 is a flowchart of an insulator detection method according to another embodiment of the present application.

In the figure: an insulator 1; a laser 2; a first laser filter 3; a second laser filter 4; a vibration sensor 5; a photoelectric sensor 6; a data acquisition card 7; a computer 8; a sighting telescope 9; a high voltage line 10; a base 11; a laser mount 12; a photoelectric sensor mount 13; a computer mount 14.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are also within the scope of the application.

The inventor has already known that the insulator to be tested is in a usable state or a damaged state, and the frequency spectrums corresponding to the reflected laser are different, so that whether the insulator to be tested is in a usable state or a damaged state can be detected through the frequency spectrums of the laser reflected by the insulator to be tested. Therefore, this principle can be applied to detecting an insulator that has been used in its installation, and acquiring the spectrum of the laser light reflected in the current state of the insulator. And then matching the frequency spectrum of the laser reflected by the insulator in the current state with the frequency spectrum of the laser reflected by the insulator in the available state, so as to obtain whether the insulator is in the available state at present. A more detailed procedure on how to obtain the spectrum of the laser light reflected at the current state of the insulator can be seen therein as follows.

Fig. 1 is a schematic structural diagram of an insulator detection device according to an embodiment of the present application. As shown in fig. 1, in combination with fig. 2-3, the apparatus comprises: base 11, laser 2, photoelectric sensor 6, data acquisition card 7 and computer 8.

The base 11 is provided with a computer mounting seat 14, a rotatable laser mounting seat 12 and a rotatable photoelectric sensor mounting seat 13; the computer 8 may be mounted on the computer mount 14, the laser 2 may be mounted on the laser mount 12, and the photosensor 6 may be mounted on the photosensor mount 13;

After the rotatable laser mounting seat 12 rotates, the emitting end of the laser 2 can face the insulator 1 to be tested;

After the rotatable photoelectric sensor mounting seat 13 rotates, the receiving end of the photoelectric sensor 6 can face the laser beam reflected by the insulator 1 to be tested;

The output end of the photoelectric sensor 6 is in signal connection with the input end of the data acquisition card 7;

The output end of the data acquisition card 7 is in signal connection with the computer 8.

Wherein, laser mount 12 is used for installing laser 2, and photoelectric sensor mount 13 is used for installing photoelectric sensor 6, and computer mount 14 is used for installing computer 8.

The data acquisition card 7 may be directly fixed on the upper surface of the base 11, for example, by providing a groove on the base 11, which matches with the data acquisition card 7, and clamping the data acquisition card 7 in the groove.

Wherein the insulator 1 may be at a position remote from the detecting device, for example, the insulator 1 may be a disc-type suspension porcelain insulator mounted on the high-voltage wire 10.

After the long-term use of the insulator 1, the resistance may be reduced, and the insulator 1 may not have the desired insulation effect any more, and a new insulator 1 may be needed to be replaced.

For example, in the long-term use of the disc-type suspension porcelain insulator, damage to the inside of the head of the disc-type suspension porcelain insulator may occur due to various environmental reasons, thereby causing the disc-type suspension porcelain insulator to become smaller in resistance.

Further, for convenience of description, the insulator 1 which cannot be used any more is referred to as a broken insulator in the present application, and the insulator 1 which can be used is referred to as a usable insulator.

Further, the damaged insulator is different in the degree of absorption of light irradiated thereto corresponding to the usable insulator. Thus, when the insulator 1 radiates light again, the destructive insulator is different from the characteristics of the light radiated by the usable insulator, such as different vibration frequencies, different phases, and different amplitudes. Therefore, the use state of the insulator 1 to be measured can be determined by analyzing the characteristics of the light reflected by the insulator 1.

The Laser 2 (Laser in english) is a device that amplifies or oscillates light after passing through some excited substances by using the principle of stimulated radiation, and emits a Laser beam. Comprising components such as a light source, a mirror, an amplifying substance, an optical resonator, etc., by which components the laser 2 is able to produce a laser beam with high focal power and stable intensity.

The laser 2 is mounted on the rotatable laser mounting seat 12, and by adjusting the rotation angle, the laser beam emitted by the laser 2 irradiates on the insulator 1, and after the insulator 1 reflects light, the reflected light is also in a proper range, so that the photoelectric sensor 6 is convenient to receive.

The photoelectric sensor 6 (Photoelectric Sensor in English is a device based on photoelectric effect, can convert optical signals into electric signals, and consists of a light source, an optical path and a photoelectric element. The light source generates a light beam, the light beam passes through the optical path and then reaches the photoelectric element, and the photoelectric element converts an optical signal into an electric signal through a photoelectric effect.

In the application, the photoelectric sensor 6 is used for receiving the laser reflected by the insulator 1, converting the laser into an electric signal, and transmitting the converted electric signal to the data acquisition card 7.

Wherein, rotatable photoelectric sensor mount pad 13 is used for adjusting the angle of photoelectric sensor 6 to adjust the direction of photoelectric sensor 6 receiving terminal, make the receiving terminal of photoelectric sensor 6 can receive the laser beam that insulator 1 reflection was come back, namely, adjust the angle of photoelectric sensor 6, make the receiving terminal of photoelectric sensor 6 orientation laser beam after the reflection, thereby make more reflected light beam can be received by the receiving terminal of photoelectric sensor 6, thereby can optimize the intensity of received laser beam, improve detection precision and reliability. Therefore, by rotating the photoelectric sensor mounting seat 13, a worker can flexibly adjust the position and angle of the photoelectric sensor 6 to adapt to the laser light reflected by the insulators 1 with different shapes and mounting positions.

The data acquisition card 7 (full text: data Acquisition Board, english: DAQ) is an expansion card of the computer 8, and is used for automatically acquiring detected analog or digital signals, and transmitting the acquired signals to the upper computer, so that the upper computer analyzes and processes the signals. In addition, the data acquisition card 7 has high-precision information acquisition and rapid data transmission functions so as to meet the requirements of accuracy and instantaneity of information transmission of the photoelectric sensor 6.

In the application, the input end of the data acquisition card 7 is connected with the output end of the photoelectric sensor 6 and is used for receiving the electric signal converted by the photoelectric sensor 6. The data acquisition card 7 is responsible for sampling and converting the received electrical signal and converting the electrical signal into a digital signal through an internal analog-to-digital converter. The data acquisition card 7 then transmits the digital signal to the computer 8 for further analysis and processing by the computer 8.

The computer 8 may be a general purpose computer 8 or an embedded system, such as a Personal Computer (PC) or a single board computer 8. The computer 8, by being connected to the data acquisition card 7, receives the signal from the data acquisition card 7 and processes the signal, for example, for data analysis, image processing or calculation of other related algorithms.

The computer 8 may also provide a user interface to set parameters, display detection results, etc. through the user interface.

In addition, the computer 8 is also used for storing the frequency spectrum of the vibration frequency of the laser reflected by the insulator 1 in different states detected in advance, so that the frequency spectrum can be obtained in time when in use. Wherein the different states include the above-mentioned bad state and usable state.

Further, the computer 8 is further configured to receive the digital signal and convert the digital signal into a frequency spectrum, and the detailed description of the related art can be seen, which is not repeated herein.

The computer 8 mentioned above is used to store and run the relevant algorithms as described in the following method embodiments.

For example, when the detection of one insulator 1 to be detected is completed, and the computer 8 generates a frequency spectrum of the vibration frequency of the reflected laser light corresponding thereto, the frequency spectrum is compared with the frequency stored in advance to determine the state of the insulator 1 to be detected.

The working process of the insulator detection device is as follows:

The staff moves the insulator detection device to a detection site and starts a computer 8, a laser 2, a data acquisition card 7 and a photoelectric sensor 6;

The worker rotates the laser mounting seat 12 to change the direction of the emitting end of the laser 2 and make the emitting end face the insulator 1 to be tested, so that the laser emitted by the emitting end is emitted to the insulator 1 to be tested; the insulator 1 absorbs part of the light and re-radiates the laser, i.e. absorbs and reflects the laser;

The angle of the photoelectric sensor 6 is adjusted, so that the photoelectric sensor 6 can receive reflected light rays, convert the reflected light rays into corresponding electric signals, and then send the converted electric signals to the data acquisition card 7;

The data acquisition card 7 receives the electric signal output by the photoelectric sensor 6, converts the received electric signal into a digital signal and transmits the digital signal to the computer 8;

After receiving the information of the data acquisition card 7, the computer 8 generates a frequency spectrum corresponding to the vibration frequency; comparing and analyzing the generated frequency spectrum of the vibration frequency with a frequency spectrum corresponding to a pre-stored available insulator to evaluate whether the electrical performance and the mechanical performance of the insulator 1 are changed or not; for example, determining the similarity of the two, if the similarity is larger than a preset value, determining the insulation to be tested as an available insulator, if the similarity is smaller than the preset value, determining the insulation to be damaged, generating a detection report, or giving an alarm;

The detection results can be checked and saved by the staff through a user interface displayed by the computer 8 for subsequent analysis and recording.

The insulator detection device provided by the application comprises a base 11, a laser 2, a photoelectric sensor 6, a data acquisition card 7 and a computer 8. The base 11 is used for installing a computer installation seat 14, a rotatable laser installation seat 12 and a rotatable photoelectric sensor installation seat 13. The laser 2 is used for emitting laser light, and the light beam irradiates on the insulator 1; the insulator 1 absorbs part of the laser light and re-reflects the laser light beam, and the reflected laser light beam is received by the photoelectric sensor 6; the photoelectric sensor 6 receives the reflected laser beam, converts the reflected laser beam into an electric signal and transmits the electric signal to the data acquisition card 7; the data acquisition card 7 converts the received information into data information and transmits the data information to the computer 8, and the computer 8 analyzes and processes the obtained data. According to the insulator detection device, the laser 2, the photoelectric sensor 6, the data acquisition card 7 and the computer 8 are matched to obtain the frequency spectrum of laser reflected by the insulator 1 in the current state, so that the insulator 1 is detected; compared with the insulator detection device in the prior art, the insulator detection device comprises a pulse laser 2, a spectroscope, an attenuation sheet, a first lens, a first photoelectric detector, a second lens, a self-adaptive laser interferometer, a second photoelectric detector, a data acquisition card 7, a signal processor and a computer 8, and has the advantages of complex structure, more processes and higher error rate; the insulator detection device provided by the application has the advantages of simple structure, simple detection process, low error rate and improved detection efficiency. In addition, when the insulation detection device is used, the insulation detection device can be operated on the ground, equipment such as the laser 2 and the like does not need to be fixed at the high-altitude position of the insulator 1, so that the labor cost is reduced, and the danger caused by the fact that workers need to climb to the high-altitude operation in the working process is reduced.

Optionally, the computer mount 14, the rotatable laser mount 12, and the rotatable photosensor mount 13 are detachably fixed on the base 11, so that when they fail, disassembly and maintenance can be performed, and convenience of maintenance is improved.

Optionally, the computer 8, the laser 2 and the photoelectric sensor 6 are detachably mounted on the computer mounting seat 14, the laser mounting seat 12 and the photoelectric sensor mounting seat 13 respectively, so that the computer 8, the laser 2 and the photoelectric sensor 6 can be detached, replaced or maintained conveniently when the computer 8, the laser 2 and the photoelectric sensor 6 are in failure.

Optionally, a sighting telescope 9 is arranged in front of the emitting end of the laser 2.

Wherein the scope 9 can help a worker align the insulator 1 to be tested according to a mark or a guideline of the scope 9 to determine whether the position and angle of the laser 2 are proper through the scope 9.

The use of the collimator 9 allows the laser 2 to be precisely illuminated on the insulator 1, so that reliable reflected light can be obtained for subsequent analysis and processing, so as to better evaluate the mechanical and electrical performance variations of the insulator 1.

Optionally, at the receiving end of the photosensor 6, a first laser filter 3 is arranged in front.

The first laser filter 3 has a specific spectral characteristic, and can filter the optical signal, only allow the laser beam to pass through, and not allow other beams to pass through.

After the first laser filter 3 is arranged at the front, the laser reflected by the insulator 1 is filtered by the first laser filter 3 and enters the photoelectric sensor 6, so that the interference of other stray light is reduced, and the detection precision is improved.

Optionally, the insulator detection device further includes a vibration sensor 5 and a rotatable vibration sensor mounting seat disposed on the base 11, where the vibration sensor 5 may be mounted on the vibration sensor mounting seat, and when the vibration sensor mounting seat rotates, a receiving end of the vibration sensor 5 may face the laser beam reflected by the insulator 1 to be detected, and an output end of the vibration sensor 5 is in signal connection with the data acquisition card 7.

When the vibration sensor mounting seat rotates, the receiving end of the vibration sensor 5 faces the laser beam reflected by the insulator 1, so that the vibration sensor 5 can receive the laser beam reflected from the surface of the insulator 1, analyze the vibration frequency of the reflected laser beam, and send the vibration frequency to the data acquisition card 7, so that the data acquisition card 7 sends the data to the computer 8, and the data can be stored, checked and the like through the computer 8.

In this case, the data acquisition card 7 can simultaneously receive signals from the photoelectric sensor 6 and the vibration sensor 5 and send the signals to the computer 8, so that the computer 8 can synchronously record signals of vibration frequencies sent by the two devices, thereby improving the accuracy of the vibration frequency of the reflected laser beam, and knowing the mechanical and electrical properties of the insulator 1 or the characteristic change and potential fault condition of the insulator 1 in the operation process more accurately.

In addition, since the vibration sensor 5 and the photoelectric sensor 6 are both configured to receive the laser light reflected from the insulator 1, the two devices are positioned closer to each other so that both devices can receive the reflected laser light at maximum limit.

Optionally, a second laser filter 4 is arranged in front of the receiving end of the vibration sensor 5.

The second laser filter 4 has a specific spectral characteristic, and can filter the optical signal, so that only the laser beam can pass through, and other beams cannot pass through.

After the second laser filter 4 is arranged at the front, the laser beam reflected by the insulator 1 is filtered by the second laser filter 4 and enters the vibration sensor 5, so that the interference of other stray light is reduced, and the detection precision is improved.

Alternatively, the laser 2 is a pulsed laser 2.

The pulsed laser 2 has the capability of emitting a pulsed laser beam, which emits a high-energy, short-pulse-width laser beam in the form of pulses. The pulsed laser 2 is configured to generate a high-energy laser pulse in an excited substance by means of an optical resonator, an amplifying substance, and the like. Such a pulsed laser 2 has a high peak power and a short pulse width and is suitable for accurate measurement and capturing of rapidly varying signals.

In particular, in the detection of the insulator 1, the short pulse emitted by the pulse laser 2 can be rapidly irradiated onto the insulator 1 to be detected, the variation and reflection characteristics of the surface of the insulator 1 are captured, and the pulse energy of the pulse laser 2 ensures the intensity and quality of the reflected signal.

Optionally, the base 11 is configured as a receiving cavity structure.

Wherein, the base 11 is provided with a containing cavity structure, for example, the base 11 is provided with a hollow cuboid structure, and connecting wires among devices above the base 11 can be arranged in the containing cavity to improve the aesthetic property above the base 11.

Further, after the detection work is completed, each device above the base 11 can be detached and placed in the accommodating cavity, so that substances such as external dust and impurities are prevented from entering the device, or things such as external matters are prevented from colliding or extruding the devices, so that the effect of protecting each device is achieved, and the service life of each device can be prolonged.

Fig. 4 is a flowchart illustrating an insulator detection method according to an embodiment of the present application. The method shown in fig. 4 may be performed by the computer 8 in fig. 1, as shown in fig. 4, and comprises the steps of:

step 201, acquiring a first spectrum, where the first spectrum is obtained through a plurality of available insulator sample spectrums.

The insulator samples are multiple, and generally are more in number, so that the accuracy of the first frequency spectrum is improved.

The spectrum of the insulator sample is the spectrum of the laser reflected by the insulator sample.

Wherein the first spectrum is generated in advance and stored in the computer 8 so as to be available at any time when needed.

For convenience of description, the insulator sample is referred to in the present application as an insulator in a usable state.

In the present application, the insulator sample for generating the first spectrum may be an available insulator which is not mounted on the high-voltage line, but may be an available insulator which is not mounted on the high-voltage line, or an available insulator which is mounted on the high-voltage line, as long as the insulator sample is in an available state. Further, since the detection method of the application detects the state of the insulator to be detected on the high-voltage line, when the first frequency spectrum is generated, the frequency spectrum of the insulator sample in the available state which is already installed on the high-voltage line is obtained, so that the accuracy of the first frequency spectrum, namely the accuracy of the reference frequency spectrum, is improved, and the accuracy of the detection result of the insulator to be detected is also improved.

Further, referring to fig. 5, the computer 8 may generate the first spectrum by the following steps 2011 and 2012:

in step 2011, sample spectra of a plurality of insulator samples are acquired.

Wherein the sample spectrum is the spectrum of the available insulator samples.

To ensure that the sample is an insulator in a usable state, the resistance value of the insulator sample needs to be measured by a zero value tester to ensure that it is in a usable state.

Further, whether the insulator sample is in a usable state or not is determined by the resistance of the insulator sample, if the resistance is large, the insulator sample is in a usable state, and if the resistance is low or zero, the insulator sample is in a damaged state, and the resistance can be measured by an instrument, such as a zero value tester of the insulator.

The sample spectrum may be the spectrum of the laser reflected by a plurality of different points on the same insulator sample, or the spectrum of the laser reflected by the same point on the same insulator sample at different times, or the spectrum of the laser reflected by different insulator samples.

Further, taking an insulator sample as an example, the sample spectrum may be generated by:

The laser 2 emits laser light and irradiates on an insulator sample, the insulator sample reflects the laser light, the photoelectric sensor 6 receives the reflected laser light and converts optical signals of the reflected laser light into electrical signals, the electrical signals are transmitted to the data acquisition card 7, the data acquisition card 7 converts the acquired electrical signals into digital signals and transmits the digital signals to the computer 8, and the computer can perform further data analysis, so that the spectral characteristics of the insulator sample are generated.

Step 2012, calculating an average value of the sample spectrum to obtain the first spectrum.

The spectrum generally reflects the frequency versus amplitude, generally with the abscissa being frequency and the ordinate being amplitude.

Alternatively, the process of calculating the average value of the sample spectrum may be: obtaining a frequency value included in each sample spectrum to obtain frequency values included in all sample spectrums; and calculating the average value of the amplitudes of the sample spectrums at each frequency to obtain a first spectrum. Alternatively, it is understood that the abscissa of the spectrum of each sample is unchanged, and the value of the ordinate is averaged to obtain the first spectrum.

Step 202, acquiring a digital signal sent by the data acquisition card 7, and generating a second frequency spectrum based on the digital signal, wherein the second frequency spectrum is a frequency spectrum of laser reflected by an insulator to be tested and installed on a high-voltage line.

The digital signal is obtained by emitting laser through the laser 2 and irradiating the laser on the insulator to be detected, receiving the laser reflected by the insulator to be detected by the photoelectric sensor 6, converting the received optical signal into an electric signal, receiving the electric signal by the data acquisition card 7, and converting the electric signal into the digital signal.

The second spectrum is generated by the insulator detection system described above and stored in the computer 8. Further, the generation process of the second spectrum may refer to the relevant content of the insulator detection system, which is not described in detail herein.

Step 203, comparing the first frequency spectrum with the second frequency spectrum, and if the similarity between the second frequency spectrum and the first frequency spectrum is greater than or equal to a preset value, determining that the insulator to be tested is an available insulator.

And if the similarity between the second frequency spectrum and the first frequency spectrum is smaller than a preset value, determining that the insulator to be detected is a damaged insulator.

The similarity between the second spectrum and the first spectrum may be determined by the values of the abscissa and the ordinate of the first spectrum and the second spectrum, for example, if the abscissa of the second spectrum is in phase with the abscissa of the first spectrum, that is, the frequency ranges of the second spectrum and the first spectrum are the same, and the ordinate corresponding to the same frequency is also substantially the same, it is determined that the two spectrums are substantially the same, and the similarity is greater, for example, it is determined that the similarity is 90%.

The preset values and the similarity can be set according to actual conditions and specifications of insulators, and can be analyzed and determined according to relevant standards or empirical data.

The similarity can be determined by the following method:

Further, the first spectrum and the second spectrum are compared by the following method, and the similarity is determined:

A. The two spectrums are displayed in a superimposed manner so as to intuitively compare the change conditions of the vibration frequency and the amplitude, and the similarity is calculated by the computer 8.

The similarity may be defined based on an average value of absolute values of the variation values of the magnitudes corresponding to the respective frequencies, and the lower the similarity is determined when the average value is larger, the lower the average value is, and the higher the similarity is determined.

Alternatively, the similarity of the second spectrum to the first spectrum may be determined by:

step one, for each frequency, calculating the absolute value of the difference between a second amplitude value and a first amplitude value to obtain a plurality of absolute values, wherein the second amplitude value is the amplitude value corresponding to the frequency in a second frequency spectrum, and the first amplitude value is the amplitude value corresponding to the frequency in a first frequency spectrum.

And step two, calculating the reciprocal of the average value of the absolute values to obtain the similarity.

When the frequency ranges of the second frequency spectrum and the first frequency spectrum are different, the situation that the same frequency value does not have corresponding amplitude value can occur, and the frequency ranges of the two frequency spectrums are complemented to be consistent by taking the larger frequency range as the standard and adopting the mode of amplitude value zero filling to the smaller frequency spectrum.

Further, when the sum is greater than or equal to a preset value, determining that the insulator to be tested is a damaged insulator; and when the sum value is smaller than a preset value, determining the insulator to be tested as an available insulator.

B. for the two spectrums, key characteristic parameters such as peak frequency, frequency range, peak amplitude, amplitude range and the like can be extracted, and comparison analysis is performed to obtain similarity.

The maximum, minimum of the magnitudes in the first and second spectra are analyzed, illustratively using computer 8. For example, the amplitude of the first spectrum varies in the range of-2 to 1, and the amplitude of the second spectrum varies in the range of-4 to 2. By comparing these characteristic parameters, the similarity between the first spectrum and the second spectrum can be calculated. If the similarity is greater than or equal to a preset value while the variation of the vibration frequency is within a preset range, the insulator is an available insulator; if the similarity is lower than a preset value, the insulator is damaged.

C. the two spectra are compared globally or locally by means of a mathematical method, such as correlation analysis, difference comparison, etc., by means of a computer 8. By these methods, the similarity between the spectra can be quantitatively evaluated, thereby judging whether the variation in the vibration frequency exceeds a preset range.

And judging whether the change of the vibration frequency exceeds a preset range and whether the similarity accords with a preset value according to the comparison result, and generating a comparison report.

The computer 8 records the comparison result, including the state (available or damaged) of the insulator to be tested and specific data of the comparison result. These records can be used for subsequent analysis and evaluation and as a reference basis for maintaining and managing the insulators.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present application, and not limiting thereof; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. An insulator detection device, characterized by comprising: the device comprises a base, a laser, a photoelectric sensor, a data acquisition card and a computer;

2. The insulator detection device of claim 1, wherein a telescope is provided on the emitting end of the laser.

3. The insulator detection device of claim 1, wherein a first laser filter is disposed in front of the receiving end of the photosensor.

4. The insulator detection device of claim 3, further comprising a vibration sensor and a rotatable vibration sensor mount disposed on the base, the vibration sensor being mountable on the vibration sensor mount, the vibration sensor being receivable with a receiving end of the vibration sensor being receivable towards the laser beam after being reflected by the insulator under test when the vibration sensor mount is rotated, an output end of the vibration sensor being in signal connection with the data acquisition card.

5. The insulator detection device of claim 4, wherein a second laser filter is disposed in front of the receiving end of the vibration sensor.

6. The insulator detection device of any one of claims 1-5, wherein the laser is a pulsed laser.

7. The insulator detection device of claim 6, wherein the base is configured to accommodate a cavity structure.