CN115327313A - Electrical equipment partial discharge inspection device for capturing sound pressure of noise point - Google Patents
Electrical equipment partial discharge inspection device for capturing sound pressure of noise point Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The invention provides an electrical equipment partial discharge inspection device for capturing sound pressure of noise points, and belongs to the technical field of inspection of power distribution networks and outdoor transformer substations. The utility model provides an electrical equipment partial discharge investigation device that acoustic pressure was caught is carried out noise, catches the system including the noise, the data processing end that the system is connected is caught to the noise, the noise is caught the system and is included cloud platform base, acoustic pressure collection module, the data processing end includes multichannel audio frequency collection card, processing terminal, key input module and display module, and is built-in audio frequency conversion unit, audio mixing processing unit, electricity in the processing terminal are swept program control unit, signal processing control unit, feedback output unit. On the basis of original equipment, the design of a monitoring structure is optimized, a dynamic noise capturing system is constructed, the audio data are disassembled and distinguished by adopting an attenuation identification mode, and the identification and positioning precision is improved.
Description
Technical Field
The invention belongs to the technical field of routing inspection of power distribution networks and outdoor substations, and particularly relates to an electrical equipment partial discharge inspection device for capturing sound pressure of noise points.
Background
At present, a large amount of electrical equipment in an electric power system is compactly arranged and concentrated, the insulation margin is smaller and smaller, especially when air pollution is serious and humidity is high, surface discharge of local areas of insulators can occur to the electrical equipment running in the environment, and further serious consequences of reduction of insulation life and damage of the electrical equipment are caused, and production safety is affected. In order to prevent this, the power department performs periodic inspections of the mounted circuits and the power equipment.
A substation is an environment in which various noises exist. When some malfunction occurs in the equipment, some abnormal sounds are also emitted, and these abnormal sounds are mixed in the environmental noise. If the abnormal sounds can be accurately positioned, the fault equipment can be accurately judged, so that faults can be eliminated, and the loss of the transformer substation caused by the equipment faults is reduced.
When partial discharge occurs in high-voltage electrical equipment, ultrasonic energy is generated and is emitted to the periphery due to the breakdown phenomenon of gas or liquid on the insulating surface. The position of the partial discharge point can be determined by an ultrasonic detection method, i.e., by detecting the sound wave occurring during the discharge by a sound pressure sensor. However, the traditional sound pressure sensor can only realize a small-range regional fuzzy positioning mode and cannot accurately position the partial discharge part.
The utility model CN206193169U discloses an electrical equipment partial discharge investigation device accurate directional's partial discharge ultrasonic array sensor who carries out acoustic pressure to the noise point and catch, including shell, micromotor, reduction gear, shaft coupling, piezoelectric plate, the structure of spiraling, array board and ultrasonic array sensing element. The device drives the spiral structure through the positive and negative rotation of the motor to enable the array plate to rotate in a reciprocating and circulating manner, so that scanning type detection is carried out. However, the device has more mechanical structures, is relatively complex and is inconvenient to use.
The invention with patent number CN102360059A discloses an on-line detection method and device for local faults of power transmission and distribution lines of an electrical equipment local discharge investigation device for capturing sound pressure of noise points, the invention adopts a method of on-line remote directional focusing pickup/positioning, captures ultrasonic signals generated in a discharge process, converts the picked ultrasonic signals into sound/electric signals which can be identified by detection personnel by a heterodyne method, qualitatively and quantitatively judges whether a filthy discharge phenomenon exists at a part where a local discharge fault is easy to occur and the intensity of filthy discharge according to the numerical value or the change of the sound pressure/voltage, thereby judging the intensity of filthy discharge at the position of the discharge fault according to the intensity of the filthy discharge and the intensity of the system threat, greatly reducing the cost of manual work and fixed detection, reducing the workload of power failure in the past and effectively ensuring the safe operation of electrical equipment. However, the present invention can only adopt a fixed point detection method, and cannot detect the existence of the partial discharge part comprehensively, and the outdoor electrical equipment installation environment is relatively bad, and the data reception is difficult to avoid being interfered by noise signals.
At present, a noise positioning instrument widely used in a transformer substation collects noise by adopting a one-dimensional linear array or a two-dimensional array, the one-dimensional array has large limitation on sound field direction information pickup, and the precision is also low; the two-dimensional array is influenced by the incident direction, and the error is large when the distance is measured; the microphone has the factors of low sensitivity, low system running speed, low efficiency and the like, cannot meet the requirements in actual work, and brings great trouble to maintenance work. However, no more advanced and more accurate and efficient sound pressure sensor array-based electrical equipment monitoring system is urgently needed to be developed for solving the problem that the noise can be accurately positioned.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an electrical equipment partial discharge inspection device for capturing noise points by sound pressure, which is used for capturing, monitoring, distinguishing and identifying the noise points, aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the partial discharge investigation device for the electrical equipment for capturing the noise point by sound pressure comprises a noise capturing system, a data processing end connected with the noise capturing system,
the noise capturing system comprises a holder base and a sound pressure acquisition module arranged on the holder base,
the data processing end comprises a multi-channel audio acquisition card connected with the sound pressure acquisition module, a processing terminal connected with the multi-channel audio acquisition card, a key input module and a display module connected with the processing terminal,
an audio conversion unit, a sound mixing processing unit, an electric scanning program control unit, a signal processing control unit and a feedback output unit which are arranged in the processing terminal,
the electric scanning program control unit is respectively connected with the holder base and the key input module.
The cloud platform base includes that triaxial cloud platform base, 3 close 1 spherical cloud platform base, biax track rotatory cloud platform base, acoustic pressure collection module includes equipment fixing frame, sets up sound pressure sensor on the equipment fixing frame, sound pressure sensor includes electric capacity electret microphone, noise sound sensor, equipment fixing frame is for fixing the spatial structure frame of cloud platform base upper mounting end, the spatial structure frame includes positive triangular pyramid frame, ring frame, axial symmetry or array frame, the equidistant setting of acoustic pressure sensor is in on the spatial structure frame.
The multi-channel audio acquisition card is respectively connected with the corresponding sound pressure sensors arranged in the sound pressure acquisition modules and is used for synchronously acquiring audio signals detected by the sound pressure sensors; the multichannel audio acquisition card is connected with a high-precision electronic clock to realize accurate time service of the audio signals and comprises analog-to-digital converters connected with the sound pressure sensors in a one-to-one correspondence mode and adapters connected with the analog-to-digital converters.
The processing terminal comprises a server and a high-performance computer, the key input module comprises a keyboard and a handwriting board, and the display module comprises a display screen and a projector.
The data transmission line arranged on the processing terminal is connected with the holder base; the electric scanning program control unit is connected with an attitude control system in the holder base through the data transmission line, and realizes the change, regulation and control of various parameters in the attitude control system so as to achieve the accurate control of the relative spatial attitude of the sound pressure acquisition module arranged on the holder base; and the keyboard realizes the input of relevant parameters in the electric scanning program control unit.
The audio conversion unit converts the audio signals read by the processing terminal from the multi-channel audio acquisition card and accurately time-service into audio data inserted with time sequence marks, the electric scanning program control unit inputs the spatial coordinate parameters of the sound pressure sensor in the sound pressure acquisition module into the audio conversion unit, and the audio conversion unit inserts the audio data received by the sound pressure sensor arranged at different time node positions into the corresponding spatial coordinates.
The electric scanning program control unit reads audio data under different time node parameter models by controlling the running state of the holder base, the audio mixing processing unit comprises an ultrasonic array data model and a correction instruction output end, the ultrasonic array data model comprises an arrival direction algorithm, an array structure, an array signal processing algorithm and an audio splitting unit, the arrival direction algorithm realizes the positioning of the direction of audio, the array structure is the structure and space layout parameters of the equipment mounting rack and the sound pressure sensor in the sound pressure acquisition module, the array signal processing algorithm is an AML-based model parameter method, the audio splitting unit decomposes relevant values with inconsistent audio data attenuation under different time node parameter models according to the relative energy attenuation ratios of frequency, hertz, timbre, periodicity or regular amplitude, and the ultrasonic array data model realizes the distinguishing, dismantling and positioning of the audio data by combining the relative energy attenuation ratios of different postures of the holder base in different time node parameter models and different frequencies, hertz, timbre, periodicity or regular amplitude in the audio; the correction instruction output end is connected with the electric scanning program control unit, and when data read by the ultrasonic array data model are incomplete, the correction instruction output end sends an instruction of resetting a motion track of the electric scanning program control unit.
And the signal processing control unit identifies, classifies and outputs the audio data after disassembly, distinguishing and positioning according to the characteristics of noise points.
The feedback output unit converts the audio data output by the signal processing control unit into video signals or distance parameters and sends the video signals or the distance parameters to the display module.
Furthermore, the traditional transformer substation or electrical equipment is simple in structure, and no barrier is available, so that the sound noise point can be propagated linearly, namely the direction of the sound source is the direction of noise generation. Meanwhile, the noise generated by the electrical equipment during operation is small or the frequency and the energy level of the noise are stable, so that the environmental background noise, the operation noise of the electrical equipment and the noise point of partial discharge of the electrical equipment are easily distinguished.
Furthermore, the traditional electrical equipment is simple in internal structure, single in voltage level and easy to operate during maintenance. The cooperation work between the electric unit of multi-voltage level is not related to, and insulating design is comparatively unified, and the inside design of traditional electrical equipment has comparatively abundant partial discharge safety clearance.
Furthermore, based on the rapid development of intellectualization and automation of the electrical equipment, the voltage difference between the operation part and the monitoring part and between the operation part and the control part in the electrical equipment is gradually increased. Combined with the fact that the voltage safety class of commonly used electrical equipment is at most 220 volts. In a strong electromagnetic environment, high-potential equipment is easy to cause discharge interference or damage to lower-potential equipment, and discharge noise is formed. In order to effectively and quickly check the discharge noise, the noise capturing and checking device for quickly detecting, decomposing and identifying the discharge noise is designed on the premise of meeting uninterrupted operation.
Further, in China, a great deal of intensive research on sound source positioning is carried out in recent years, and certain results are obtained under the support of science and technology key laboratory funds and national natural science funds. The project is deeply researched by Nanjing university of Richardship, northwest university of industry, university of liberated military information engineering, and northwest institute of Nuclear technology.
Further, acoustic positioning systems were studied earlier abroad. To date, most advanced national installations use products that have been developed and improved for most of the fifty years. Eighties have seen a new generation of sonic station systems, represented by the Pals (PALS) passive sonic system in the United kingdom, the Sores-6 (SORAS-6) sonic system in Sweden, and the SAR-2 sonic station in Israel.
Furthermore, at present, in the power industry, noise positioning instruments are also widely used in operation surfaces of transformer substations and the like, but at present, noise positioning instruments are used, a one-dimensional linear array or a two-dimensional array is mostly adopted to collect noise, the one-dimensional array has large limitation on sound field direction information pickup, and the precision is low; the two-dimensional array is influenced by the incident direction, and the error is large when the distance is measured; there are factors such as low sensitivity of the microphone, slow system operation speed, low efficiency, etc.
Compared with the prior art, the invention has the following beneficial effects:
furthermore, the sound pressure acquisition module with a three-dimensional structure is adopted, so that the difference between audio data is enlarged, and the positioning and the identification of noise points are facilitated.
Furthermore, a holder base is used as a motion platform, so that the problem that the noise is difficult to position due to the fact that the blocking object is just located between the noise generating position and the noise capturing system is avoided.
Furthermore, a multi-channel audio acquisition card is used for capturing and independently transmitting audio data by a sound pressure sensor, so that the problem that the positioning precision is reduced or the channel of a single transmission line is blocked due to audio compression distortion in the traditional merging transmission process is avoided. And a high-precision electronic clock is arranged for time service, so that the audio data can be accurately divided in time intervals.
Furthermore, the holder base is arranged to realize accurate control of the spatial motion track of the sound pressure acquisition module, so that data under different time node parameter models can be detected and read conveniently.
Further, the electric scanning program control unit controls the motion attitude of the holder base. The audio conversion unit converts the audio signals with accurate time service into audio data with time sequence marks and space coordinates, and the audio mixing processing unit is convenient to identify. The audio mixing processing unit adopts a scheme of combining a DOA algorithm and an array signal processing algorithm on the basis of carrying out characteristic data identification and energy level attenuation classification on related audio data to realize the distinguishing, disassembling and positioning of the audio data.
Furthermore, the signal processing control unit screens the discharging noise points and outputs related parameters according to the disassembled audio data. And the feedback output unit converts the relevant parameters of the screened discharge noise points into readable data.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: the operation principle diagram of the invention;
Detailed Description
For a better understanding of the invention, the following description is given in conjunction with the examples and the accompanying drawings, but the invention is not limited to the examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
Example 1
As shown in fig. 1, the present embodiment provides an electrical equipment partial discharge investigation apparatus for sound pressure capturing noise, which includes a noise capturing system, a data processing terminal connected to the noise capturing system,
the noise capturing system comprises a holder base and a sound pressure acquisition module arranged on the holder base,
the data processing end comprises a multi-channel audio acquisition card connected with the sound pressure acquisition module, a processing terminal connected with the multi-channel audio acquisition card, a key input module and a display module connected with the processing terminal,
an audio conversion unit, a sound mixing processing unit, an electric scanning program control unit, a signal processing control unit and a feedback output unit which are arranged in the processing terminal,
the electric scanning program control unit is respectively connected with the holder base and the key input module.
The cloud platform base includes that triaxial cloud platform, 3 close 1 spherical cloud platform, biax track rotatory cloud platform, acoustic pressure collection module includes the equipment fixing frame, sets up acoustic pressure sensor on the equipment fixing frame, acoustic pressure sensor includes capacitanc electret microphone, noise sensor, the equipment fixing frame is for fixing the spatial structure frame of installation end on the cloud platform base, the spatial structure frame includes positive triangular pyramid frame, ring frame, axisymmetric or array frame, the equidistant setting of acoustic pressure sensor is in on the spatial structure frame.
The multi-channel audio acquisition card is respectively connected with the corresponding sound pressure sensors arranged in the sound pressure acquisition modules and is used for synchronously acquiring audio signals detected by the sound pressure sensors; the multichannel audio acquisition card is connected with a high-precision electronic clock to realize accurate time service of the audio signals and comprises analog-to-digital converters connected with the sound pressure sensors in a one-to-one correspondence mode and adapters connected with the analog-to-digital converters.
The processing terminal comprises a server and a high-performance computer, the key input module comprises a keyboard and a handwriting board, and the display module comprises a display screen and a projector.
The data transmission line arranged on the processing terminal is connected with the holder base; the electric scanning program control unit is connected with an attitude control system in the holder base through the data transmission line, and realizes the change, regulation and control of various parameters in the attitude control system so as to achieve the accurate control of the relative spatial attitude of the sound pressure acquisition module arranged on the holder base; and the keyboard realizes the input of relevant parameters in the electric scanning program control unit.
The audio conversion unit converts the audio signals read by the processing terminal from the multi-channel audio acquisition card and accurately time-service into audio data with time sequence marks, the electric scanning program control unit inputs the spatial coordinate parameters of the sound pressure sensor in the sound pressure acquisition module into the audio conversion unit, and the audio conversion unit inserts the audio data received by the sound pressure sensor arranged at different time node positions into the corresponding spatial coordinates.
The electric scanning program control unit reads audio data under different time node parameter models by controlling the running state of the holder base, the audio mixing processing unit comprises an ultrasonic array data model and a correction instruction output end, the ultrasonic array data model comprises an arrival direction algorithm, an array structure, an array signal processing algorithm and an audio splitting unit, the arrival direction algorithm realizes the positioning of the direction of audio, the array structure is the structure and space layout parameters of the equipment mounting rack and the sound pressure sensor in the sound pressure acquisition module, the array signal processing algorithm is an AML-based model parameter method, the audio splitting unit decomposes relevant values with inconsistent audio data attenuation under different time node parameter models according to the relative energy attenuation ratios of frequency, hertz, timbre, periodicity or regular amplitude, and the ultrasonic array data model realizes the distinguishing, dismantling and positioning of the audio data by combining the relative energy attenuation ratios of different postures of the holder base in different time node parameter models and different frequencies, hertz, timbre, periodicity or regular amplitude in the audio; the correction instruction output end is connected with the electric scanning program control unit, and when data read by the ultrasonic array data model are incomplete, the correction instruction output end sends an instruction of resetting a motion track of the electric scanning program control unit.
And the signal processing control unit identifies, classifies and outputs the audio data after disassembly, differentiation and positioning according to the characteristics of noise points.
The feedback output unit converts the audio data output by the signal processing control unit into video signals or distance parameters and sends the video signals or the distance parameters to the display module.
The adapter is connected with the high-precision electronic clock.
The different time node parameter models are position parameters of the sound pressure sensor arranged on the equipment mounting frame on the premise that the holder base is at different positions.
The adapter includes that 3.5mm audio data line changes Type-C, audio data line changes USB port. Soundproof cotton is arranged in the three-dimensional structure frame, and the soundproof cotton is arranged on the premise that the audio frequency and the energy level between the discharging noise point and the environmental noise are not completely the same, so that the discharging noise point can be screened quickly.
The time service is to update and send out a time parameter every certain time.
The timing notation is that a new time parameter is inserted once every certain time interval in the audio data field.
The audio conversion unit is connected with the electric scanning program control unit.
And the relative spatial attitude parameters in the electronic scan program control unit are sent to the audio conversion unit.
When the platform is operated, the key input module can be controlled as required to realize the control of the spatial motion position and track of the platform base through the electric scanning program control unit, so that the positioning and the motion of different relative positions under the condition of different time node parameter models are achieved.
When audio data are monitored and read, the read audio information is sent to the multi-channel audio acquisition card by the sound pressure sensor arranged on the equipment mounting frame, the audio signals are converted into digital signals, and meanwhile, the high-precision electronic clock is used for carrying out accurate time service on the digital signals, so that the audio signals are captured.
The audio conversion unit converts the audio signal with accurate time service into audio data with a time sequence labeling readable format, and simultaneously combines the audio data with the space coordinates of the sound pressure sensor when the audio data is read. The ultrasonic array data model realizes the decomposition, the differentiation and the positioning of the audio data, splits the audio data into related parameters of a plurality of independent sound sources, and realizes the judgment of the attenuation of the energy level of the audio parameters by combining the noise reduction setting. Based on the array structure layout of the sound pressure sensors in the equipment mounting rack, the wave arrival direction algorithm and the array signal processing algorithm are combined, and based on the AML algorithm, the time domain array signal is converted into the frequency domain signal through the DTF, so that the positioning of the space domain parameters and the audio frequency is realized.
And (3) importing the relevant parameters of the separated independent sound source into a signal processing control unit, retrieving and comparing, and outputting the relevant parameters of the noise point sound with high Hertz and short duration on the basis of screening out the background environmental noise which continuously exists for a long time and the operation sound of the electrical equipment of which the audio frequency parameter is relatively stable and regularly or periodically changed, wherein the parameters meet the audio frequency characteristics of the discharge noise point when the electrical equipment is locally discharged. And the feedback output unit transcodes the output parameters into a readable mode of the display module. And displaying the final result.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides an electrical equipment partial discharge of carrying out sound pressure to noise point and catching arranges device which characterized in that: comprises a noise capturing system, a data processing end connected with the noise capturing system,
the noise capturing system comprises a holder base and a sound pressure acquisition module arranged on the holder base,
the data processing end comprises a multi-channel audio acquisition card connected with the sound pressure acquisition module, a processing terminal connected with the multi-channel audio acquisition card, a key input module and a display module connected with the processing terminal,
an audio conversion unit, a sound mixing processing unit, an electric scanning program control unit, a signal processing control unit and a feedback output unit which are arranged in the processing terminal,
the electric scanning program control unit is respectively connected with the holder base and the key input module.
2. The apparatus for screening partial discharge of electric equipment for sound pressure capturing of noise according to claim 1, wherein: the cloud platform base includes that triaxial cloud platform base, 3 close 1 spherical cloud platform base, biax track rotatory cloud platform base, acoustic pressure collection module includes equipment fixing frame, sets up sound pressure sensor on the equipment fixing frame, sound pressure sensor includes electric capacity electret microphone, noise sound sensor, equipment fixing frame is for fixing the spatial structure frame of cloud platform base upper mounting end, the spatial structure frame includes positive triangular pyramid frame, ring frame, axial symmetry or array frame, the equidistant setting of acoustic pressure sensor is in on the spatial structure frame.
3. The apparatus for screening partial discharge of electric equipment for sound pressure capturing of noise according to claim 2, wherein: the multi-channel audio acquisition card is respectively connected with the corresponding sound pressure sensors arranged in the sound pressure acquisition modules and is used for synchronously acquiring audio signals detected by the sound pressure sensors; the multi-channel audio acquisition card is connected with a high-precision electronic clock to realize accurate time service of the audio signals, and comprises analog-to-digital converters connected with the sound pressure sensors in a one-to-one correspondence mode and adapters connected with the analog-to-digital converters.
4. The apparatus for examining partial discharge of electric equipment for sound pressure capturing noise according to claim 3, wherein: the processing terminal comprises a server and a high-performance computer, the key input module comprises a keyboard and a handwriting board, and the display module comprises a display screen and a projector.
5. The apparatus for screening partial discharge of electric equipment for sound pressure capturing of noise according to claim 4, wherein: the data transmission line arranged on the processing terminal is connected with the holder base; the electric scanning program control unit is connected with an attitude control system in the holder base through the data transmission line, and realizes the change, regulation and control of various parameters in the attitude control system so as to achieve the accurate control of the relative spatial attitude of the sound pressure acquisition module arranged on the holder base; and the keyboard realizes the input of relevant parameters in the electric scanning program control unit.
6. The apparatus for screening partial discharge of electric equipment for sound pressure capturing of noise according to claim 5, wherein: the audio conversion unit converts the audio signals read by the processing terminal from the multi-channel audio acquisition card and accurately time-service into audio data with time sequence marks, the electric scanning program control unit inputs the spatial coordinate parameters of the sound pressure sensor in the sound pressure acquisition module into the audio conversion unit, and the audio conversion unit inserts the audio data received by the sound pressure sensor arranged at different time node positions into the corresponding spatial coordinates.
7. The apparatus for examining partial discharge of electric equipment for sound pressure capturing noise according to claim 6, wherein: the electric scanning program control unit reads audio data under different time node parameter models by controlling the operation state of the holder base, the audio mixing processing unit comprises an ultrasonic array data model and a correction instruction output end, the ultrasonic array data model comprises a wave arrival direction algorithm, an array structure, an array signal processing algorithm and an audio splitting unit, the wave arrival direction algorithm realizes the positioning of the direction of audio, the array structure is the structure and space layout parameters of the equipment mounting rack and the sound pressure sensor in the sound pressure acquisition module, the array signal processing algorithm is an AML-based model parameter method, the audio splitting unit decomposes relevant numerical values with inconsistent audio data attenuation under different time node parameter models according to the relative energy attenuation ratios of frequency, hertz, timbre, periodicity or regular amplitude, and the ultrasonic array data model combines the relative energy attenuation ratios of different postures of the holder base and different frequencies, hertz, timbre, periodicity or regular amplitude in the audio in the different time node parameter models to realize the distinguishing, dismantling and positioning of the audio data; the correction instruction output end is connected with the electric scanning program control unit, and when data read by the ultrasonic array data model are incomplete, the correction instruction output end sends an instruction of resetting a motion track of the electric scanning program control unit.
8. The apparatus for screening partial discharge of electric equipment for sound pressure capturing noise according to claim 7, wherein: and the signal processing control unit identifies, screens and outputs the audio data after disassembly, differentiation and positioning according to the characteristics of noise points.
9. The apparatus for screening partial discharge of electric equipment for sound pressure capturing noise according to claim 8, wherein: the feedback output unit converts the audio data output by the signal processing control unit into video signals or distance parameters and sends the video signals or the distance parameters to the display module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116931654A (en) * | 2023-09-13 | 2023-10-24 | 杭州爱华仪器有限公司 | Portable audio signal generating device and control method thereof |
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| CN116931654A (en) * | 2023-09-13 | 2023-10-24 | 杭州爱华仪器有限公司 | Portable audio signal generating device and control method thereof |
| CN116931654B (en) * | 2023-09-13 | 2023-11-24 | 杭州爱华仪器有限公司 | Portable audio signal generating device and control method thereof |
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