CN218674862U - Ultrasonic signal automatic regulating device applied to insulator crack detection - Google Patents
Ultrasonic signal automatic regulating device applied to insulator crack detection Download PDFInfo
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- CN218674862U CN218674862U CN202222598025.9U CN202222598025U CN218674862U CN 218674862 U CN218674862 U CN 218674862U CN 202222598025 U CN202222598025 U CN 202222598025U CN 218674862 U CN218674862 U CN 218674862U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The ultrasonic signal automatic regulating device applied to the insulator crack detection comprises an upper computer, a monitor and an ultrasonic detection unit; the monitor is in wireless communication with an upper computer through an antenna; the monitor comprises a temperature and humidity sensor which is arranged on the insulator in an embedding mode and used for monitoring the temperature and humidity change of the insulator; the ultrasonic detection unit is arranged on the surface of the insulator and connected with the upper computer, the ultrasonic detection unit comprises a signal excitation end and a signal receiving end, the signal excitation end is used for receiving a pulse signal sent by the upper computer to generate an ultrasonic signal, and the signal receiving end is used for receiving a feedback ultrasonic signal on the surface of the insulator and sending the feedback ultrasonic signal to the upper computer.
Description
Technical Field
The utility model relates to a signal conditioning equipment especially relates to an ultrasonic signal automatic regulating apparatus who is applied to in insulator crackle, belongs to insulator crackle detection technical field based on supersound guided wave.
Background
A gas insulated totally enclosed switchgear (GIS) is widely used in power systems of various voltage classes, and a basin insulator is one of important insulation components of the GI S. The manufacturing process of the basin-type insulator is complex, the insulator self-defect is caused by residual stress and interface state generated by demoulding in the material curing process, and the material is aged and the original defect is enlarged due to the electric-thermal-stress coupling effect in the long-term operation process. The enlargement of the insulation defect will degrade the insulation characteristics of the insulator, causing partial discharge and flashover. The insulator defect detection technology based on ultrasonic waves judges whether the interior of a test piece has defects or not, and the sizes and the positions of the defects by utilizing the emission and the refraction of the ultrasonic waves at an interface and the attenuation of the ultrasonic waves in the transmission process, and has the advantages of low cost, high detection efficiency, high detection speed and the like.
However, in the process of detecting the defects of the insulator based on the ultrasonic guided waves, a series of field detection is carried out, and regular data acquisition and comparative analysis are carried out on monitoring points, so that for the same known defects, when the temperature and humidity of the environment where the insulator is located greatly change, the identification positions of the defects deviate, and even exceed the positioning errors allowed by detection, the temperature and humidity of the environment of the insulator need to be monitored, the size of the ultrasonic guided wave signals is automatically adjusted based on the temperature and humidity, and the detection efficiency of detecting the defects of the insulator by the ultrasonic guided waves is improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies in the prior art, the utility model discloses an ultrasonic signal automatic regulating apparatus for in insulator crackle, its technical scheme as follows:
an automatic ultrasonic signal adjusting device applied to insulator cracks comprises an upper computer, a monitor and an ultrasonic detection unit; the monitor is in wireless communication with an upper computer through an antenna; it is characterized in that: the monitor comprises a temperature and humidity sensor which is arranged on the insulator in an embedding mode and used for monitoring the temperature and humidity change of the insulator; the ultrasonic detection unit is arranged on the surface of the insulator and connected with the upper computer, the ultrasonic detection unit comprises a signal excitation end and a signal receiving end, the signal excitation end is used for receiving a pulse signal sent by the upper computer to generate an ultrasonic signal, and the signal receiving end is used for receiving a feedback ultrasonic signal on the surface of the insulator and sending the feedback ultrasonic signal to the upper computer.
Preferably: the temperature and humidity sensor is embedded into the groove of the insulator, and a layer of heat-conducting silicone grease is coated in the groove.
Preferably: the upper computer is used for processing the received ultrasonic signals to obtain corresponding ultrasonic signal energy attenuation rate, and surface crack detection of the insulator is achieved.
Preferably: the monitor realizes wireless communication with the upper computer through a wireless local area network.
Preferably: and the upper computer adjusts the size of the output pulse signal according to the data acquired by the temperature and humidity sensor and sends the pulse signal to the excitation end of the ultrasonic detection unit.
Advantageous effects
The utility model discloses considered the humiture to ultrasonic signal's influence, can be according to the big small intensity of insulator humiture change in good time adjustment ultrasonic wave to reduce insulator crack detection precision, improved the accuracy of testing result.
Drawings
FIG. 1 is a reference drawing of the apparatus of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
fig. 3 (a) and (b) are schematic diagrams showing the relationship between humidity and the ultrasonic sound velocity at a constant temperature in the prior art.
Description of the reference numerals
1, an upper computer; 2, monitoring; 3, an ultrasonic detection unit; 4 insulators.
Detailed Description
The invention will be further described with reference to the following figures 1-3 and examples.
An automatic ultrasonic signal adjusting device applied to insulator cracks comprises an upper computer 1, a monitor 2 and an ultrasonic detection unit 3; the monitor 2 is in wireless communication with an upper computer through an antenna; it is characterized in that: the monitor 2 comprises a temperature and humidity sensor which is arranged on the insulator 4 in an embedding manner and is used for monitoring the temperature and humidity change of the insulator 4; the ultrasonic detection unit 3 is arranged on the surface of the insulator and connected with the upper computer, and comprises a signal excitation end and a signal receiving end, wherein the signal excitation end is used for receiving a pulse signal sent by the upper computer to generate an ultrasonic signal, and the signal receiving end is used for receiving a feedback ultrasonic signal on the surface of the insulator and sending the feedback ultrasonic signal to the upper computer. The temperature and humidity sensor is embedded into the groove of the insulator, and a layer of heat-conducting silicone grease is coated in the groove. The upper computer is used for processing the received ultrasonic signals to obtain corresponding ultrasonic signal energy attenuation rate, so that the surface crack detection of the insulator is realized; the monitor is in wireless communication with an upper computer through a wireless local area network; and the upper computer adjusts the size of the output pulse signal according to the data acquired by the temperature and humidity sensor and sends the pulse signal to the excitation end of the ultrasonic detection unit.
The utility model discloses a rely on the technical scheme that prior art disclosed, the influence of ultrasonic testing defect location ration has been recorded by ultrasonic testing by temperature principle like article "temperature (author grand clock, journal" nondestructive test "2011 volume 33 th phase):
in an elastic medium, the speed of sound is:
wherein E is the Young's modulus of elasticity of the medium, and G is the rigidity modulus of the medium, or called shear modulus of elasticity; rho is medium density, sigma is Poisson's ratio, the elastic modulus in the material changes at different temperatures, generally speaking, the elastic modulus decreases with the increase of the temperature, so the sound velocity of ultrasonic waves changes at different temperatures, the propagation velocity of ultrasonic waves in general solid media decreases with the increase of the temperature, for ultrasonic flaw detection of material gaps, a transverse wave oblique probe is generally used, when ultrasonic waves pass through a heterogeneous interface, waveform conversion occurs, and the law conforms to the law of refraction:
when the temperature changes, the propagation speed in the corresponding medium is influenced, so that the refraction angle changes under the influence of the change of the sound velocity, the detection result in the ultrasonic detection changes, and meanwhile, the ultrasonic wave propagates in the medium or has more or less loss, so that the amplitude and the intensity of the ultrasonic wave are reduced along with the increase of the distance.
Through careful analysis and comparison of different sets of data collected from the experiment, the following conclusions can be reached: in the temperature range of-20 to 120 degrees, the transverse wave/longitudinal wave sound velocity is gradually reduced along with the increase of the temperature, the descending trend is similar to a straight line, the influence on positioning is not obvious in the longitudinal wave straight flaw detection, and the transverse wave oblique flaw detection depth positioning is according to a formula D In fact ＝[c m ·cosθ m /(c Calibration ·cosθ Calibration )]·D m And (6) compensating. In addition, it is known from the records of the article "influence of different hot and humid environments on ultrasonic measurement" (journal "sensor and microsystem", vol. 38, no. 9, 2019, by the author, wang yueming, etc.): and under different humidity environments, the influence on the sound velocity of the ultrasonic waves is avoided. Fig. 3 is a graph showing the relationship between the ultrasonic sound velocity changes of different temperatures and humidity. Wherein, the x-axis is relative humidity, the y-axis is ultrasonic sound velocity, and five curves in fig. 3 are ultrasonic sound velocity data experiments measured at 5 groups of temperatures of 16, 19, 21, 24, and 27 ℃.
In short, the temperature and humidity in the air have a certain influence on the sound velocity measurement of the ultrasonic waves, and the influence of the temperature on the sound velocity of the ultrasonic waves is larger than the influence of the humidity on the sound velocity of the ultrasonic waves within a certain range. At a constant air temperature, an increase in the relative humidity increases the ultrasonic sound velocity. At a constant relative humidity of the air, the ultrasonic sound velocity increases due to an increase in temperature. The higher the temperature is, the greater the ultrasonic propagation speed is; the higher the relative humidity is, the higher the ultrasonic wave propagation speed is, and the influence of the humidity in the air on the ultrasonic wave sound speed is smaller than the influence of the temperature on the ultrasonic wave sound speed. The utility model discloses the principle combines above-mentioned prior art, at first according to above-mentioned well-known content in the host computer, designs a temperature and humidity change to the threshold value curve of ultrasonic wave influence to with the threshold value that temperature and humidity-ultrasonic wave sound amplitude curve corresponds as the benchmark, make the comparison with the humiture data of insulator environment collection through data processing such as AD conversion back and host computer in the benchmark, thereby regard as the control command adjustment ultrasonic size with the difference signal.
The working principle and the working process of the embodiment are as follows: the insulator environmental temperature humidity of real-time supervision, inlay in the inside temperature sensor of insulator and insulator environmental humidity sensor collection temperature humidity information transfer for monitor 2, monitor 2 transmits the temperature humidity signal for host computer 1 through its antenna. The upper computer performs data comparison on the acquired temperature and humidity signals through a preset temperature and humidity threshold value of the upper computer, so that an ultrasonic signal control command is adjusted, corrected and output according to a comparison result and sent to a signal excitation end 31 of the ultrasonic detection unit 3, the signal excitation end 31 is used for receiving pulse signals and generating timely-adjusted ultrasonic signals, and a signal receiving end 32 is used for receiving the ultrasonic signals to detect the insulator.
The upper computer adjusts and corrects the size of the ultrasonic signal in real time according to the detected temperature and humidity parameters, and makes up the temperature and humidity influence of ultrasonic waves in the insulator defect detection process. Certainly, the temperature and humidity should be controlled within a reasonable range in the example detection process, and when the upper computer judges that the current temperature is too high or the humidity is too high or too low, an alarm effect is played, so that corresponding countermeasures can be started conveniently to ensure the detection accuracy.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The ultrasonic signal automatic regulating device applied to the insulator crack detection comprises an upper computer, a monitor and an ultrasonic detection unit; the monitor is in wireless communication with an upper computer through an antenna; it is characterized in that: the monitor comprises a temperature and humidity sensor which is arranged on the insulator in an embedding manner and is used for monitoring the temperature and humidity change of the insulator; the ultrasonic detection unit is arranged on the surface of the insulator and connected with the upper computer, the ultrasonic detection unit comprises a signal excitation end and a signal receiving end, the signal excitation end is used for receiving a pulse signal sent by the upper computer to generate an ultrasonic signal, and the signal receiving end is used for receiving a feedback ultrasonic signal on the surface of the insulator and sending the feedback ultrasonic signal to the upper computer.
2. The automatic ultrasonic signal adjusting device applied to the insulator crack according to claim 1, wherein: the temperature and humidity sensor is embedded into the groove of the insulator, and a layer of heat-conducting silicone grease is coated in the groove.
3. The automatic ultrasonic signal adjusting device applied to the insulator crack according to claim 1, wherein: the upper computer is used for processing the received ultrasonic signals to obtain corresponding ultrasonic signal energy attenuation rate, and surface crack detection of the insulator is achieved.
4. The automatic ultrasonic signal adjusting device applied to the insulator crack according to claim 1, wherein: the monitor realizes wireless communication with the upper computer through a wireless local area network.
5. The automatic ultrasonic signal adjusting device applied to the insulator crack according to claim 1, wherein: and the upper computer adjusts the size of the output pulse signal according to the data acquired by the temperature and humidity sensor and sends the pulse signal to the excitation end of the ultrasonic detection unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222598025.9U CN218674862U (en) | 2022-09-29 | 2022-09-29 | Ultrasonic signal automatic regulating device applied to insulator crack detection |
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| CN202222598025.9U CN218674862U (en) | 2022-09-29 | 2022-09-29 | Ultrasonic signal automatic regulating device applied to insulator crack detection |
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| CN218674862U true CN218674862U (en) | 2023-03-21 |
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| CN202222598025.9U Active CN218674862U (en) | 2022-09-29 | 2022-09-29 | Ultrasonic signal automatic regulating device applied to insulator crack detection |
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