CN216695250U - Device for analyzing and prejudging fault through live equipment operation noise frequency spectrum - Google Patents

Abstract

The utility model belongs to the technical field of transformer substation detection equipment, and discloses a fault pre-judging device through the operation noise spectrum analysis of charged equipment, which comprises a shell, wherein an upper side protective shell is arranged on the upper side of the shell, a solid conduction sound pickup is arranged on the upper side of the upper side protective shell, and a lower side protective shell is arranged on the lower side of the shell; the upside of the upside protective housing is provided with a clamping groove, the clamping groove is clamped with a TF card, and the upside protective housing is provided with a USB interface and an RS232 interface. The body is provided with a liquid crystal display, and the right side of the liquid crystal display is embedded with a key; the shell is internally provided with a controller, a frequency range filter, a digital detector, a controller and a storage battery. The utility model integrates the prior live equipment operation noise spectrum analysis pre-judgment fault equipment, thereby avoiding the complex field wiring process, simultaneously being capable of working by hands, reducing the operation difficulty and improving the working efficiency.

Description

Device for analyzing and prejudging fault through live equipment operation noise frequency spectrum

Technical Field

The utility model belongs to the technical field of detection equipment of a power transformation and distribution station, and particularly relates to a fault pre-judging device through analysis of a live equipment operation noise spectrum.

Background

At present, the reliability requirements of important electrical and electronic equipment in a power transformation and distribution station, such as various screen cabinets, microcomputer five-prevention, switches, disconnecting links, instruments and meters, are numerous, and how to realize the early pre-judgment of faults and find hidden dangers of online running equipment is an urgent and necessary problem. All the above-mentioned equipment is in operation, because the existence of power frequency, high frequency resonance, fan operation, contact vibration's factor, all can send the noise of different grade type loudness, though the performance is complicated, through the principle of spectral analysis, just can realize the purpose to its trouble prejudgement. The frequency spectrum is the short for frequency spectrum density, and is the distribution curve of frequency, and complicated noise decomposes into oscillations with different amplitudes and different frequencies, and the pattern that the amplitudes of these harmonic oscillations are arranged according to frequency is called as the frequency spectrum.

The most basic physical quantity reflecting the sound vibration phenomenon is frequency, the device operation noise cannot describe the motion condition of the device by using one frequency, and the characteristics of the device operation noise cannot be quantitatively described on a vibration pattern, a frequency spectrum can be usually used for describing the complex noise vibration condition, and any complex noise can be decomposed into the sum of a plurality of simple harmonic vibrations with different amplitudes and different frequencies. In order to analyze the vibration property of the actual noise, an image formed by arranging the vibration amplitudes of the sub-vibrations according to the frequency of the sub-vibrations is called a frequency spectrum of the noise vibration, so that the noise frequency spectrum of the equipment can contain abundant and accurate running mass information, and whether the equipment normally works or not, whether hidden dangers exist or not, whether the equipment needs to be immediately processed or not and the like can be visually judged, so that evidence is provided for eliminating the defects.

The existing equipment for pre-judging faults by operating noise spectrum analysis of charged equipment needs electronic equipment such as a sound pick-up, a frequency range filter, a digital detector, a liquid crystal display and the like to perform noise spectrum analysis and pre-judging faults after wiring on a detection field. Because the equipment is more, the wiring is complicated, and whole equipment is not convenient for carry out handheld work after the wiring, has increased the operation degree of difficulty, has reduced work efficiency. Meanwhile, due to the external wiring, the working risk of operation and maintenance personnel is increased, and the safety of a power grid is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a device for analyzing and prejudging faults through the operating noise spectrum of live equipment.

The technical scheme adopted by the utility model is as follows:

a failure pre-judging device through analysis of operating noise spectrum of live equipment comprises a shell; an upper side protective shell is installed on the upper side of the shell, a solid conduction sound pickup is installed on the upper side of the upper side protective shell, and a lower side protective shell is installed on the lower side of the shell; the shell is provided with a liquid crystal display, and the right side of the liquid crystal display is embedded with a key; a controller is arranged in the shell, a storage battery is arranged at the right end of the controller, and a FLASH memory is arranged at the left side of the shell; the upper end of the controller is provided with a digital detector, and the upper end of the digital detector is provided with a frequency range filter.

Further, upside protective housing upside is provided with the draw-in groove, and the draw-in groove joint has the TF card, is provided with USB interface and RS232 interface on the upside protective housing.

Further, the left side and the right side of the shell are provided with handheld handles, and rubber insulating sleeves are arranged on the handheld handles.

Further, a dorsal plate is installed on the back side of the shell, a groove is formed in the dorsal plate, and a telescopic supporting rod is installed in the groove through a pin shaft.

Furthermore, the end part of the telescopic supporting rod is provided with an anti-skid block, and the anti-skid block is provided with rubber concave-convex points.

The utility model has the beneficial effects that:

the utility model realizes the fault prejudgment of important electrical and electronic equipment in the transformer substation, such as various screen cabinets, microcomputer five-prevention, switches, disconnecting links, instruments and meters, reduces the equipment fault rate, prolongs the fault-free operation time, reduces the part loss and the working risk of operation and maintenance personnel, improves the comprehensive benefits of enterprises and ensures the safety of a power grid; the maintenance scheme of the equipment in the station is added, and the maintenance, prejudgment, alarm and replacement and maintenance means of the power equipment are comprehensively improved by combining other existing instruments, so that the intelligent level of the system in the power transformation and distribution station is improved. Meanwhile, the portable handheld type intelligent alarm clock has the advantages of small size, light weight, portable handheld design, continuous work, simple prompt interface, rich display content, simplicity and convenience in operation, compact structure, high automation degree and easiness in popularization.

The solid-state conduction sound pick-up performs solid-state direct conduction type audio sampling, and is small in acoustic resistance and strong in rigidity. The digital detector adopts a digital detection technology, 24-bit conversion is carried out by an A/D module, and the sampling frequency is 48kHz, so that the accuracy and the high-speed response of the test are ensured.

The liquid crystal display is a dot matrix liquid crystal display and is provided with an LED backlight. The frequency range filter measures 1/1 octave filter data in real time, calculates and displays the sound pressure level of each central frequency point, the device can store and display the instantaneous sound level for a period of time, and the measuring time can be set manually.

The FLASH memory can store 3000 single-group measurement results or 200 whole-time measurement results, and can also be additionally provided with an SD card with the storage capacity expanded to 32G at maximum so as to store more measurement data. Data in the instrument F1ash and the SD card can be output through the RS-232 interface in data exporting, and data files in the SD card can also be read through the USB interface.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a device for analyzing and predicting a fault through a spectrum of operating noise of a live device according to an embodiment of the present invention;

FIG. 2 is a schematic view of an upper protective shell according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a housing according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a backside plate structure according to an embodiment of the present invention;

in the figure: 1. a housing; 2. a hand-held handle; 3. a solid state conduction sound pick-up; 4. a liquid crystal display; 5. an upper protective shell; 6. pressing a key; 7. a lower protective shell; 8. a card slot; 9. TF card; 10. a USB interface; 11. an RS232 interface; 12. a frequency range filter; 13. a digital detector; 14. a controller; 15. a FLASH memory; 16. a storage battery; 17. a back side plate; 18. a groove; 19. a pin shaft; 20. a telescopic support rod; 21. and (4) an anti-skid block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Aiming at the problems in the prior art, the utility model provides a device for analyzing and prejudging faults through the operating noise spectrum of live equipment, and the utility model is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the device for predicting faults through spectrum analysis of operating noise of a charged device according to the embodiment of the present invention is provided with a housing 1, an upper protective shell 5 is installed on an upper side of the housing 1, a solid state conduction sound pickup 3 is installed on an upper side of the upper protective shell 5, and a lower protective shell 7 is installed on a lower side of the housing 1; the left side and the right side of the shell 1 are provided with the handheld handles 2, the handheld handles 2 are provided with rubber insulating sleeves, and the handheld handles 2 can be held when the shell is used; the shell 1 is provided with a liquid crystal display 4, and the right side of the liquid crystal display 4 is embedded with a key 6.

As shown in fig. 3, a controller 14 is installed inside a housing 1 according to an embodiment of the present invention, a storage battery 16 is installed at the right end of the controller 14, and a FLASH memory 15 is installed at the left side of the housing 1; the upper end of the controller 14 is provided with a digital detector 13, and the upper end of the digital detector 13 is provided with a frequency range filter 12. The controller 14 is a commercially available CPU processor, and a specific model is not limited herein, and a calculation program and a control program are written therein.

As shown in fig. 4, a back side plate 17 is installed on the back side of the housing 1 according to the embodiment of the present invention, a groove 18 is formed in the back side plate 17, a telescopic support rod 20 is installed in the groove 18 through a pin 19, an anti-skid block 21 is installed at an end of the telescopic support rod 20, and a rubber concave-convex point is formed on the anti-skid block 21. When this through electrified equipment operation noise frequency spectrum analysis prejudgement fault device is put on the slope mesa, rotatable flexible bracing piece 20 to adjust flexible bracing piece 20 length, utilize flexible bracing piece 20 tip to install non slipping spur 21 and support the device.

The technical scheme of the utility model is described in detail by combining the specific embodiments as follows:

sampling: the controller 14 is electrically connected with the display 4, and the controller 14 is electrically connected with the solid conduction sound pick-up 3; the device for analyzing and prejudging faults through the operating noise spectrum of the charged equipment outputs a sampling instruction to the controller 14 through the key 6 on the display 4, and the controller 14 controls the solid-state conduction sound pickup 3 to be started; the solid state conduction microphone 3 performs solid state direct conduction audio sampling.

The solid-state conduction sound pick-up 3 has small acoustic resistance and strong rigidity, not only can accurately collect the running noise of the equipment to be tested, but also can shield other nearby equipment and environmental noise, and ensures the accuracy of sampling. The solid direct conduction type audio sampling design adopts a solid conduction sound pick-up 3 with small acoustic resistance and strong rigidity, the diameter of the solid conduction sound pick-up is 12.7mm, and a pre-polarization test capacitor microphone. Test frequency range: 10Hz-20kHz, and meets the noise characteristics of power frequency, high-frequency resonance, fan operation, contact vibration and the like. The measurement range is wide: 20dB-130dB (A), 23dB-130dB (C), 28dB-130dB (Z) dynamic range is greater than 100dB (A weight), and the stable noise and burst noise of the running equipment can be accurately measured and tested.

Adopting treatment: the frequency range filter 12 and the digital detector 13 are both electrically connected with the controller 14 and the solid conduction sound pick-up 3; the frequency range filter 12 and the digital detector 13 adopt digital filtering and digital detection, and the frequency weighting ACZ and the time weighting FSI of the controller 14 are calculated through the digital filtering and the digital detection.

Specifically, the 1/1 octave filter 12 is calculated by a digital filtering method, and can simultaneously measure the sound levels of Fast, Slow, Impulse, Peak and A, C, Z with different frequency weights at different times, the Peak value Peak only plays a role in C weight, the sound pressure level of each frequency point can be obtained in real time, and the comprehensive spectrum analysis of noises such as power frequency, high-frequency resonance, fan operation, contact vibration and the like is realized, so that the 1/1 octave filter has the advantages of high reliability, good stability, wide dynamic range and the like. The digital detector 13 is provided with an A/D device, can convert 24 bits, and has a sampling frequency of 48kHz so as to ensure the accuracy of the test and high-speed response.

The results show that: the liquid crystal display 4 is electrically connected with the controller 14, and the controller 14 displays the processing result through the liquid crystal display 4 after receiving the processing result; the display adopts a 160 multiplied by 160 lattice liquid crystal display 4 with low power consumption, and is provided with an LED backlight, and the display mainly comprises the following display contents: simultaneously measuring and displaying 10 measurement indexes, a time-varying sound pressure level curve, a statistical distribution graph, an accumulated distribution graph, a 24-hour distribution graph, calculated values of L1-L99, a 1/1 real-time spectrogram and the like.

And (4) storing a result: the FLASH memory 15 is electrically connected with the controller 14 and used for storing results; the 2M capacity FLASH memory can store 3000 groups of single-group measurement results or 200 groups of measurement results at the same time, and the measurement results can be stored in the device for a long time.

And (4) function expansion: as shown in fig. 2, a card slot 8 is disposed on an upper side of an upper protection shell 5 provided in the embodiment of the present invention, a TF card 9 is clamped in the card slot 8, and a USB interface 10 and an RS232 interface 11 are disposed on the upper protection shell 5. The storage capacity of the additional TF card 9 can be expanded to a maximum of 32G so as to store more measurement data. The data in the instrument F1ash and the TF card 9 can be output through the RS-232 interface after the data is exported, and the data is printed out by a miniature printer on site or afterwards through the built-in RS-232 interface or sent to a computer for processing; the data files in the TF card 9 can also be read through the USB interface.

The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment has the characteristics that:

the measurement precision of the sound level meter meets GB/T3785(IEC61672) level 1; the frequency range filter 12 meets the requirements of IEC1260 and GB/T3241 on a 1-level 1/1 octave filter; the dynamic range is larger than 100dB, the measuring range does not need to be converted during measurement, and three frequency weighting A, C, Z and three time weighting F, S, I can be simultaneously and parallelly finished during measurement.

Peak noise can be measured according to the peak Cpeak sound level of the new national standard; 10 measurement indexes can be measured and displayed simultaneously, and simultaneously, a graph can also be displayed; the equivalent continuous sound level, Leq value, of the sound pressure level of each frequency point in a period of time can be calculated according to the center frequency point of the 1/1 octave filter. Complete digital signal processing, wide frequency response range, large dynamic range and lower background noise.

Airport noise measurement can be carried out according to the standard, and the airport noise data acquisition function is provided. The noise measurement method comprises the steps of displaying a time domain curve of noise while measuring the noise, storing by a large-capacity MicroSD card (TF card), and storing by a USB interface and an RS232 interface.

The instrument has a 2M capacity FLASH memory inside, and the implementation standard is as follows: GB/T3785-2010(IEC61672:2002) level 1; a microphone: a Φ 12.7mm (1/2') pre-polarized test condenser microphone; frequency range: 10Hz to 20 kHz; measurement range: 20dB to 130dB (A), 23dB to 130dB (C), 28dB to 130dB (Z); dynamic range: greater than 100dB (weighted by a).

Frequency weighting: parallel (simultaneous) A, C, Z weighting; time weighting: parallel (simultaneous) fast (F), slow (S), I (pulse) and cpaak; detector characteristics: digital detection techniques; A/D bit number: 24 bits; sampling frequency: 48 kHz; a display: 160 x 160 dot matrix liquid crystal displays with LED backlights; step measuring range: the linear range of each gear is more than or equal to 100 dB. High: 30dB to 130 dB; low: 20dB to 110 dB; LCpeak: high: 70 dB-133 dB; low: 50dB to 113 dB.

The main display content is as follows: 10 measurement indexes and the time-varying curve of the sound pressure level can be measured and displayed simultaneously. Statistical profiles, cumulative profiles, 24-hour profiles, calculated values of L1-L99, 1/1 real-time spectrograms. Noise spectrum measurement: the device can measure 1/1 octave filter data in real time, calculate and display the sound pressure level of each central frequency point, and the instrument can store and display real-time data. Setting the measurement time: the single group of measurement time can be selected from 10s, 1min, 5min, 10min, 15min, 20min, 30min, 1h, 8h and 24 h. The Man manual mode time is set arbitrarily within 24 hours. The main measurement indexes are as follows: lxyp, Lxeq, Lxae, Lxmax, Lxmin, LxN, SD, E, DI%. X is A, C, Z, Y is F, S, I, and N is 5, 10, 50, 90, 95.

The shell 1 is designed in a full-insulation mode, is internally provided with the storage battery 16 for power supply, has no potential safety hazard, is small in size, light in weight, portable and handheld, can continuously work and is suitable for the power field environment. The liquid crystal display 4 adopts a 160 × 160 dot matrix liquid crystal display and displays with background light, thereby being simple and convenient in prompting interface, rich in display content, simple and convenient in operation, compact in structure and high in automation degree. The RS232 interface 11 is printed by a micro printer on site or after the fact or sent to a computer for processing.

The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment is not only used for a power transformation and distribution station, but also can be used for measuring airport noise;

airport noise measurement: and calculating Td, LEPN, LAmax and LA' max, wherein the measurement time is 60 seconds at most, and the measurement can be finished manually and the result can be calculated. Collecting noise measurement: the instantaneous sound level is calculated and stored for a period of time, which can be set manually. Data storage: only F1ash may store a single set of 3000 measurements or a full time set of 200 measurements. The storage capacity of the SD card can be expanded to 32G at most. More measurement data can be stored. Data processing software: and reading the data and the SD card data file by using HS7001 software, performing post-processing analysis and outputting a report. Data export: data in the instrument F1ash and the SD card can be output through the RS-232 interface, and data files in the SD card can also be read through the USB interface. And (3) outputting: AC output, RS-232 port and USB port.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the utility model, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the utility model as defined by the appended claims.

Claims (5)

1. The utility model provides a through electrified equipment operation noise spectral analysis failure prediction device which characterized in that: the device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment comprises a shell;

an upper side protective shell is installed on the upper side of the shell, a solid conduction sound pickup is installed on the upper side of the upper side protective shell, and a lower side protective shell is installed on the lower side of the shell;

the shell is provided with a liquid crystal display, and the right side of the liquid crystal display is embedded with a key;

a controller is arranged in the shell, a storage battery is arranged at the right end of the controller, and a FLASH memory is arranged at the left side of the shell; the upper end of the controller is provided with a digital detector, and the upper end of the digital detector is provided with a frequency range filter.

2. The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment according to claim 1, is characterized in that: the upside of the upside protective housing is provided with a clamping groove which is clamped with a TF card, and the upside protective housing is provided with a USB interface and an RS232 interface.

3. The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment according to claim 1, characterized in that: the casing left and right sides is provided with handheld handle, is provided with the insulating cover of rubber on handheld handle.

4. The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment according to claim 1, characterized in that: the dorsal scale board is installed to the casing dorsal scale, is provided with the recess on the dorsal scale board, and flexible bracing piece is installed through the round pin axle to the recess.

5. The device for analyzing and prejudging the fault through the operating noise spectrum of the live equipment according to claim 4, is characterized in that: the end part of the telescopic supporting rod is provided with an anti-skid block, and the anti-skid block is provided with rubber concave-convex points.

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