CN113567064A - Detection method of acoustic imager - Google Patents
Detection method of acoustic imager Download PDFInfo
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- CN113567064A CN113567064A CN202110886340.9A CN202110886340A CN113567064A CN 113567064 A CN113567064 A CN 113567064A CN 202110886340 A CN202110886340 A CN 202110886340A CN 113567064 A CN113567064 A CN 113567064A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/007—Leak detector calibration, standard leaks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
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Abstract
The invention discloses a detection method of an acoustic imager, which relates to the field of acoustic imaging application. The invention can achieve the purpose of adjusting the sound receiving range and the sound receiving frequency range of the acoustic imager by adjusting and opening and closing the partial microphone arrays, properly adjust the sound receiving frequency range of the microphone arrays by combining with a field scene, more pertinently carry out fault detection, improve the accuracy of fault detection, and can rotatably adjust the imager body by pulling the tightening pull rope, thereby changing the orientation of the microphone arrays on the imager body and being more convenient for a worker to carry out detection work.
Description
Technical Field
The invention relates to the technical field of acoustic imaging application, in particular to a detection method of an acoustic imager.
Background
The industrial acoustic imager is mainly used for industries such as power plant power generation, electric power, metallurgy, petrochemical industry and natural gas, and can quickly and accurately position air, gas and vacuum leakage in a fluid system even in a noisy environment. Mounting a 7 inch LCD touch screen can help the user quickly find the location of the leak. A simple and intuitive interface enables the user to identify the leaking audio frequency, thereby filtering out large background noise. The acoustic imager integrates an acoustic radar with a high-definition visible light probe. The position of the gas leakage is located on a visible light picture, wherein the acoustic radar uses a 64-high-end microphone array to locate the position of the gas leakage, so that the sound imager can find the site sound emission position, namely the leakage position, and can measure the decibel size and the wave band of the sound.
The acoustic imager is particularly used for detecting leakage of a heating surface of a boiler in a power plant, the detection range of the existing industrial acoustic imager cannot be adjusted and limited, detection omission can be caused due to the fact that the leakage acoustic frequency of a hidden place is small when the existing industrial acoustic imager is detected in a large range, and the existing acoustic imager cannot judge whether the leakage problem exists or not and the size of the leakage problem according to image imaging characteristics.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a detection method of an acoustic imager.
In order to achieve the purpose, the invention adopts the following technical scheme:
a detection method of an acoustic imager specifically comprises the following steps;
s1, adjusting the detection range and the audio frequency range of the acoustic imager by opening and closing the sound receiving microphone matrix according to the actual monitoring scene;
s2, collecting original audio data by using an acoustic imager:
s3, the acoustic imager processes and analyzes the original audio data to obtain an acoustic imaging graph;
s4, judging whether a problem occurs and the size of the problem according to the imaging characteristics;
and S5, observing and judging the fault reason nearby, and recording the reference solution of the fault by combining the problem size and the degree of the internal processor of the acoustic imager and the conventional solution.
Preferably, in the step S1, the purpose of adjusting the distance of the sound receiving range and the sound receiving frequency range of the acoustic imager can be achieved by adjusting and opening/closing part of the microphone array, and in the step S2, the blind corner position which is not easy to be perceived by the monitoring device can be monitored by means of the expansion tool installed on the acoustic imager.
Preferably, the processing and analyzing of the audio data in step S3 specifically includes the following steps:
s31, taking a picture (visible light) of the position where the abnormal sound frequency occurs;
s32, converting different audio signals into visible light with corresponding colors by an internal processor of the acoustic imager to obtain a sound source intensity distribution diagram;
and S33, overlapping and fusing the position picture of the generated audio signal and the sound source intensity distribution map obtained in the step S32 by the internal processor of the acoustic imager to obtain a final acoustic imaging map.
Preferably, the step S4 of determining whether the problem occurs and the size of the problem specifically includes the following steps:
s41, inputting the acoustic imaging chart obtained in the step S33 into an internal processor of the acoustic imager;
s42, calling fault acoustic imaging images recorded by the same type of equipment in the previous day by an internal processor of the acoustic imager, carrying out feature comparison analysis on the fault acoustic imaging images and the acoustic imaging images obtained at present, judging that a fault occurs if similar imaging images are found, and otherwise, not generating the fault;
and S43, comparing the size of the imaging graph with similar characteristics to judge the size of the equipment failure problem.
Preferably, the acoustic imager includes imager body, display screen and microphone array, the left and right sides of imager body all is provided with the side handle, the upper and lower both sides of imager body all rotate and are connected with the commentaries on classics piece, and two the side all sets up the sliding sleeve that runs through the commentaries on classics piece in the upper and lower both sides between the handle.
Preferably, the left side the side is fixed mounting on the imager body, the sliding sleeve slides in the commentaries on classics piece, be provided with the double-screw bolt on the commentaries on classics piece, fixedly connected with nut on the double-screw bolt, the screw that corresponds the double-screw bolt is all seted up with the middle part to the left end of sliding sleeve, and the left side the side is to the card hole of seting up corresponding sliding sleeve.
Preferably, a sliding rod is connected in the sliding sleeve in a sliding mode, protruding blocks are arranged on two sides of the left end of the sliding rod, a spring is connected between the two protruding blocks, through holes corresponding to the protruding blocks are evenly formed in two sides of the sliding sleeve, and the side handle is fixedly connected with the right ends of the two sliding rods.
Preferably, the recess that corresponds the display screen is seted up to imager body front side, and the right side the draw-in groove that corresponds the display screen is seted up to the left side to the side, microphone array fixed mounting is on imager body, just one side of microphone array is equipped with the receipts sound box of fixed mounting in imager body rear side.
Preferably, the receipts sound microphone is installed in the receipts sound box outside, and both sides all are provided with the tympanic membrane about the receipts sound box, and the lithium cell is installed to the upside of tympanic membrane, the upside of lithium cell is equipped with the lift lamp of installing on the receipts sound box, and a plurality of stay cords of one side fixedly connected with of receipts sound box are overlapped on a plurality of stay cords and are equipped with the horizontal bar, the right side the side is connected with the bull stick to the internal rotation, and the bull stick both ends are provided with torque spring, and are a plurality of the other end fixed connection of stay cord is on the bull stick, just the other end of stay cord is provided with the knot.
Compared with the prior art, the invention has the beneficial effects that:
1. the method can achieve the purpose of adjusting the far and near sound collection range and the sound collection frequency range of the acoustic imager by adjusting and opening and closing part of the microphone array, and combines the field scene, if the field is open, the sound collection range can be properly increased, if the field is narrow, the sound collection range can be properly decreased, if the field is noisy, the sound collection frequency range of the microphone array can be properly adjusted, so that the fault detection can be more pertinently carried out, and the accuracy of the fault detection can be improved;
2. according to the method, the fault acoustic imaging graphs recorded by the same type of equipment on the previous day are called, feature comparison analysis is carried out on the fault acoustic imaging graphs and the acoustic imaging graphs obtained at present, if similar imaging graphs are found, a fault is judged, otherwise, no fault occurs, and the internal processor compares the imaging graphs with the similar characteristics with the imaging graphs obtained at present to judge the size of the equipment fault problem, so that the detection efficiency of the equipment fault is improved;
3. according to the invention, the imager body is expanded through the side plate structure, so that when workers detect audio frequencies in a hidden and narrow place, the sound receiving box, the lifting lamp and the lithium battery are arranged on the sound receiving box, the sound receiving box and the lifting lamp and the lithium battery are convenient to confirm which direction has audio frequency fluctuation, so that the workers can find a fault point as soon as possible, the detection efficiency is improved, the imager body can be rotationally adjusted by pulling the tightening pull rope, the orientation of the microphone array on the imager body is further changed, and the detection work of the workers is more convenient.
Drawings
Fig. 1 is a schematic main control flow diagram of a detection method for an acoustic imager according to the present invention;
fig. 2 is a schematic view illustrating a sound collection control of an acoustic imager in a detection method of the acoustic imager according to the present invention;
fig. 3 is a schematic structural diagram of an acoustic imager in the detection method of the acoustic imager according to the present invention;
fig. 4 is a schematic structural diagram of an acoustic imager in the detection method of the acoustic imager according to the present invention;
fig. 5 is a schematic view of an unfolded structure of an acoustic imager in the detection method of the acoustic imager according to the present invention;
fig. 6 is a schematic diagram of an unfolded structure of an acoustic imager in the detection method of the acoustic imager according to the present invention;
fig. 7 is a schematic diagram of a back-side unfolded structure of an acoustic imager in the detection method of the acoustic imager according to the present invention.
In the figure: 1. an imager body; 2. a display screen; 3. a side handle; 4. a sliding sleeve; 5. rotating the block; 6. a sound receiving box; 7. a lift lamp; 8. a horizontal bar; 9. pulling a rope; 10. a sound-receiving microphone; 11. a microphone array; 12. a groove; 13. a bump; 14. a slide bar; 15. a stud; 16. knotting; 17. a tympanic membrane; 18. a lithium battery.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, a detection method of an acoustic imager specifically includes the following steps;
s1, adjusting the detection range and the audio frequency range of the acoustic imager by opening and closing the sound receiving microphone matrix according to the actual monitoring scene;
the purpose of adjusting the sound collecting range and the sound collecting frequency range of the acoustic imager can be achieved by adjusting and opening and closing the partial microphone arrays, the field scene is combined, if the field is open, the sound collecting range can be properly increased, if the field is narrow, the sound collecting range can be properly decreased, if the field is noisy, the sound collecting frequency range of the microphone arrays is properly adjusted, more pertinence fault detection is realized, and the accuracy of fault detection is improved.
S2, collecting original audio data by using an acoustic imager;
the dead angle position which is not easy to be perceived by the expanding tool monitoring equipment arranged on the acoustic imager is used, and the omission of fault detection is avoided.
S3, the acoustic imager processes and analyzes the original audio data to obtain an acoustic imaging graph;
the position where abnormal sound frequency occurs is photographed, different sound frequency signals are converted into visible light with corresponding colors by an internal processor of the acoustic imager, a sound source intensity distribution diagram is obtained, and the position picture where the sound frequency occurs and the sound source intensity distribution diagram obtained in the previous step are overlapped and fused by the internal processor, so that a final acoustic imaging diagram is obtained.
S4, judging whether a problem occurs and the size of the problem according to the imaging characteristics;
inputting the acoustic imaging graph obtained in the above step into an internal processor of the acoustic imager, calling a fault acoustic imaging graph recorded by the same type of equipment on the previous day by the internal processor of the acoustic imager, performing characteristic comparison analysis with the acoustic imaging graph obtained at present, judging that a fault occurs if a similar imaging graph is found, otherwise, judging that no fault occurs, and comparing the imaging graph with similar characteristics with the imaging graph obtained at present by the internal processor to judge the size of the equipment fault problem, thereby improving the detection efficiency of the equipment fault.
And S5, observing and judging the fault reason nearby, and recording the reference solution of the fault by combining the problem size and the degree of the internal processor of the acoustic imager and the conventional solution.
Referring to fig. 3-7, further, the acoustic imager comprises an imager body 1, a display screen 2 and a microphone array 11, wherein side handles 3 are respectively arranged at the left and right sides of the imager body 1, rotating blocks 5 are respectively rotatably connected at the upper and lower sides of the imager body 1, sliding sleeves 4 penetrating through the rotating blocks 5 are respectively arranged at the upper and lower sides between the two side handles 3, the left side handle 3 is fixedly installed on the imager body 1, the sliding sleeves 4 slide in the rotating blocks 5, studs 15 are arranged on the rotating blocks 5, nuts are fixedly connected on the studs 15, screw holes corresponding to the studs 15 are respectively arranged at the left end and the middle part of the sliding sleeve 4, clamping holes corresponding to the sliding sleeves 4 are respectively arranged at the left side handle 3, sliding rods 14 are slidably connected in the sliding sleeves 4, lugs 13 are respectively arranged at the left end and two sides of each sliding rod 14, springs are connected between the two lugs 13, and through holes corresponding to the lugs 13 are respectively arranged at two sides of the sliding sleeve 4, the right side handle 3 is fixedly connected with the right ends of the two sliding rods 14;
when audio frequency detection needs to be carried out on a relatively hidden narrow place, due to the limitation of terrain, the imager body 1 needs to be expanded, a microphone array 11 on the imager body 1 is conveniently aligned to the place needing to be detected, a screw cap on a rotating block 5 is loosened, a screw bolt 15 at the lower end of the screw cap is separated from a screw hole on a sliding sleeve 4, the sliding sleeve 4 is pulled out towards the right side until the left end of the sliding sleeve 4 is moved to the left side of the rotating block 5, sliding is stopped, the screw bolt 15 is screwed into a corresponding screw hole at the left end of the sliding sleeve 4, a sliding rod 14 sliding in the sliding sleeve 4 is pulled out, a display screen 2 is taken out from a groove 12 on the imager body 1 through a lug 13 at the left end of the sliding rod 14 and a corresponding through hole on the sliding sleeve 4 so as to fix the position of the sliding rod 14 in the sliding sleeve 4, one side of the display screen 2 is clamped into a corresponding clamping groove at the right side of a side handle 3, and the display screen 2 is installed and fixed on the right side handle 3, when the right handle 3 is unfolded, the plurality of pull ropes 9 in the right handle 3 are also pulled out, and at this time, the imager main body 1 on the other end handle 3 is pushed into the hidden area by holding the right handle 3.
Furthermore, a groove 12 corresponding to the display screen 2 is arranged on the front side of the imager body 1, a clamping groove corresponding to the display screen 2 is arranged on the left side of the right side handle 3, the microphone array 11 is fixedly arranged on the imager body 1, a sound collecting box 6 fixedly arranged at the rear side of the imager body 1 is arranged on one side of the microphone array 11, a sound collecting microphone 10 is arranged on the outer side of the sound collecting box 6, eardrums 17 are arranged on the upper side and the lower side of the sound collecting box 6, a lithium battery 18 is arranged on the upper side of the eardrum 17, a lifting lamp 7 arranged on the sound collecting box 6 is arranged on the upper side of the lithium battery 18, a plurality of pull ropes 9 are fixedly connected to one side of the sound collecting box 6, cross bars 8 are sleeved on the pull ropes 9, a rotating rod is rotatably connected to the right side handle 3 in a rotating mode, torsion springs are arranged at two ends of the rotating rod, the other ends of the pull ropes 9 are fixedly connected to the rotating rod, and a knot 16 is arranged at the other end of the pull rope 9;
when the detection work is carried out, the imager body 1 is rotated by three hundred and sixty degrees, when the sound is detected to be stirred, the sound collecting microphone 10 on the sound collecting box 6 collects sound fluctuation into the sound collecting box 6, sound waves enter the sound collecting box 6, the eardrum 17 on the upper side and the lower side of the sound collecting box 6 vibrate, the lithium battery 18 on the eardrum 17 vibrates along with the eardrum, when the lithium battery 18 vibrates along with the upper side and the lower side, one pole on the upper end of the battery is contacted with one pole of the lifting lamp 7 to electrify the lifting lamp 7, and further, the sound fluctuation in which direction is generated is convenient to confirm, so that a worker finds a fault point and improves the detection efficiency, in the actual detection work, the imager body 1 on the side handle 3 can be subjected to angle adjustment, the transverse strips 8 on a plurality of pull ropes 9 are pulled, the transverse strips 8 are limited by the knots 16 on the pull ropes 9, and the imager body 1 rotates between the two rotating blocks 5 as soon as possible, therefore, by pulling the tightening cord 9, the imager body 1 can be rotationally adjusted, thereby changing the orientation of the microphone array 11 on the imager body 1.
The specific use steps of the acoustic imager of the invention are as follows:
when audio frequency detection needs to be carried out on a relatively hidden and narrow place, due to the limitation of the terrain, the imager body 1 needs to be expanded, a microphone array 11 on the imager body 1 is conveniently aligned to the place needing to be detected, a screw cap on the rotating block 5 is loosened, a stud 15 at the lower end of the screw cap is separated from a screw hole on the sliding sleeve 4, the sliding sleeve 4 is pulled out towards the right side until the left end of the sliding sleeve 4 is moved to the left side of the rotating block 5, sliding is stopped, and the stud 15 is screwed into a corresponding screw hole at the left end of the sliding sleeve 4;
the sliding rod 14 sliding in the sliding sleeve 4 is pulled out, the position of the sliding rod 14 in the sliding sleeve 4 is fixed through the through hole corresponding to the sliding sleeve 4 and the lug 13 on the two sides of the left end of the sliding rod 14, the display screen 2 is taken out from the groove 12 on the imager body 1, one side of the display screen 2 is clamped into the clamping groove corresponding to the right side of the side handle 3, the display screen 2 is installed and fixed on the right side handle 3, along with the expansion of the right side handle 3, the plurality of pull ropes 9 in the right side handle 3 are also pulled out, at the moment, only the right side handle 3 is held, and the imager body 1 on the other end side 3 is deeply inserted into the hidden area, so that the audio frequency detection work can be carried out;
when detection is carried out, the imager body 1 is rotated by three hundred and sixty degrees, when sound stirring is detected, sound waves are collected into the sound collection box 6 by the sound collection microphone 10 on the sound collection box 6, the sound waves enter the sound collection box 6, the eardrums 17 on the upper side and the lower side of the sound collection box 6 vibrate, the lithium batteries 18 on the eardrums 17 vibrate along with the sound waves, when the lithium batteries 18 vibrate up and down along with the sound waves, one poles of the upper ends of the batteries are in contact with one pole of the lifting lamp 7, the lifting lamp 7 is electrified, and then the sound waves in which direction have the sound waves can be conveniently confirmed, so that a worker can find a fault point and improve the detection efficiency as soon as possible;
in the actual detection work, still can the offside carry out angle modulation to imager body 1 on 3, through the horizontal bar 8 on the a plurality of stay cords 9 of pulling, horizontal bar 8 receives 16 restrictions of knot on the stay cord 9, again because imager body 1 rotates between two commentaries on classics pieces 5, consequently tightens up stay cord 9 through the pulling, rotatable regulation imager body 1, and then change the orientation of microphone array 11 on imager body 1, the staff of being convenient for carries out detection achievement more.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The detection method of the acoustic imager is characterized by comprising the following steps;
s1, adjusting the detection range and the audio frequency range of the acoustic imager by opening and closing the sound receiving microphone matrix according to the actual monitoring scene;
s2, collecting original audio data by using an acoustic imager;
s3, the acoustic imager processes and analyzes the original audio data to obtain an acoustic imaging graph;
s4, judging whether a problem occurs and the size of the problem according to the imaging characteristics;
and S5, observing and judging the fault reason nearby, and recording the reference solution of the fault by combining the problem size and the degree of the internal processor of the acoustic imager and the conventional solution.
2. The method as claimed in claim 1, wherein the step S1 is performed by adjusting and opening/closing a portion of the microphone array to adjust the range of the receiving range and the range of the receiving frequency band of the acoustic imager, and the step S2 is performed by using an expanding tool installed on the acoustic imager to monitor the blind spot position that is not easily detected by the device.
3. The acoustic imager detection method of claim 1, wherein the step S3 of processing and analyzing the audio data specifically includes the steps of:
s31, taking a picture (visible light) of the position where the abnormal sound frequency occurs;
s32, converting different audio signals into visible light with corresponding colors by an internal processor of the acoustic imager to obtain a sound source intensity distribution diagram;
and S33, overlapping and fusing the position picture of the generated audio signal and the sound source intensity distribution map obtained in the step S32 by the internal processor of the acoustic imager to obtain a final acoustic imaging map.
4. The method as claimed in claim 1, wherein the step S4 of determining whether the problem occurs and the size of the problem includes the following steps:
s41, inputting the acoustic imaging chart obtained in the step S33 into an internal processor of the acoustic imager;
s42, calling fault acoustic imaging images recorded by the same type of equipment in the previous day by an internal processor of the acoustic imager, carrying out feature comparison analysis on the fault acoustic imaging images and the acoustic imaging images obtained at present, judging that a fault occurs if similar imaging images are found, and otherwise, not generating the fault;
and S43, comparing the size of the imaging graph with similar characteristics to judge the size of the equipment failure problem.
5. The acoustic imager detection method according to claim 1, wherein the acoustic imager comprises an imager body (1), a display screen (2) and a microphone array (11), side handles (3) are arranged on the left side and the right side of the imager body (1), rotating blocks (5) are rotatably connected to the upper side and the lower side of the imager body (1), and sliding sleeves (4) penetrating through the rotating blocks (5) are arranged on the upper side and the lower side between the two side handles (3).
6. The acoustic imager detection method according to claim 5, wherein the left side handle (3) is fixedly mounted on the imager body (1), the sliding sleeve (4) slides in the rotating block (5), the rotating block (5) is provided with a stud (15), the stud (15) is fixedly connected with a nut, the left end and the middle part of the sliding sleeve (4) are both provided with screw holes corresponding to the stud (15), and the left side handle (3) is provided with a clamping hole corresponding to the sliding sleeve (4).
7. The detection method of the acoustic imager according to claim 1, wherein a sliding rod (14) is slidably connected in the sliding sleeve (4), both sides of the left end of the sliding rod (14) are provided with a convex block (13), a spring is connected between the two convex blocks (13), through holes corresponding to the convex blocks (13) are uniformly formed in both sides of the sliding sleeve (4), and the side handle (3) on the right side is fixedly connected with the right ends of the two sliding rods (14).
8. The acoustic imager detection method according to claim 1, wherein a groove (12) corresponding to the display screen (2) is formed in the front side of the imager body (1), a clamping groove corresponding to the display screen (2) is formed in the left side of the side handle (3) on the right side, the microphone array (11) is fixedly installed on the imager body (1), and a sound receiving box (6) fixedly installed on the rear side of the imager body (1) is arranged on one side of the microphone array (11).
9. The acoustic imager detection method according to claim 8, wherein a sound collecting microphone (10) is installed at the outer side of the sound collecting box (6), eardrums (17) are arranged on the upper side and the lower side of the sound collecting box (6), a lithium battery (18) is installed on the upper side of the eardrum (17), a lifting lamp (7) installed on the sound collecting box (6) is arranged on the upper side of the lithium battery (18), a plurality of pull ropes (9) are fixedly connected to one side of the sound collecting box (6), a cross bar (8) is sleeved on the plurality of pull ropes (9), a rotating rod is rotatably connected to the side handle (3) on the right side, torsion springs are arranged at two ends of the rotating rod, the other ends of the plurality of pull ropes (9) are fixedly connected to the rotating rod, and a knot (16) is arranged at the other end of the pull ropes (9).
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| CN116465635A (en) * | 2022-01-12 | 2023-07-21 | 中国航发商用航空发动机有限责任公司 | Engine state detection system and method |
| CN115615624A (en) * | 2022-12-13 | 2023-01-17 | 杭州兆华电子股份有限公司 | Equipment leakage detection method and system based on unmanned inspection device |
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