CN109443519B - Directional noise detection and analysis device and operation method thereof - Google Patents
Directional noise detection and analysis device and operation method thereof Download PDFInfo
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- CN109443519B CN109443519B CN201811359198.7A CN201811359198A CN109443519B CN 109443519 B CN109443519 B CN 109443519B CN 201811359198 A CN201811359198 A CN 201811359198A CN 109443519 B CN109443519 B CN 109443519B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
Abstract
The invention discloses a directional noise detection and analysis device and an operation method thereof, belonging to the field of noise monitoring. The invention relates to a directional noise detection and analysis device and an operation method thereof, the device has a compact integral structure, when in use, the noise at a fixed point position can be effectively obtained by adopting large-range detection firstly and then directional monitoring, when in specific operation, the noise is firstly detected in a large range by a noise acquisition probe and is judged by a laser range finder so as to be adjusted, most of invalid noises can be effectively filtered, accurate and effective noise acquisition is carried out, compared with most of devices before, the device has the advantages of small structure, low production cost and lower requirement on the noise acquisition probe, and the detection effect is enhanced by structural promotion, so that the production cost is greatly reduced.
Description
Technical Field
The present invention relates to the field of noise monitoring, and more particularly, to a directional noise detection and analysis apparatus and an operation method thereof.
Background
When the hydro-junction floods, produce huge noise at rivers energy dissipation in-process, each different portion noise cause is different, and the noise characteristic also respectively has characteristics. However, since the noises in the space are mutually superposed, it is difficult to separately collect the noises at each part. The current common method is to approach the testing device to the sound source to be measured as much as possible to maximize the noise characteristic of the sound source, but in some cases, the testing instrument is limited to be unable to approach the sound source, resulting in inaccurate measuring result;
the existing directional noise detection and analysis device cannot accurately position and monitor noise.
Disclosure of Invention
The invention aims to solve the problem that monitoring noise cannot be accurately positioned, and provides a directional noise detection and analysis device and an operation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the directional noise detection and analysis device comprises a horizontal operation table, a sound insulation one-way cylinder, a laser range finder and a noise collection probe, and further comprises a left supporting tube and a right supporting tube, wherein the left supporting tube and the right supporting tube are sequentially and fixedly arranged on the front side and the rear side of the middle part of the upper surface of the horizontal operation table, the upper ends of the left supporting tube and the right supporting tube are respectively movably connected with the front side and the rear side of the lower end of the sound insulation one-way cylinder, a fixed tube is fixedly arranged below the inner part of the sound insulation one-way cylinder, a rotating tube is movably sleeved inside the lower end of the fixed tube, the lower end of the rotating tube is meshed with a driving device, a sealing tube is movably sleeved on the upper end of the fixed tube, a threaded rotating rod is movably sleeved inside the rotating tube, the noise collection probe is fixedly arranged on the upper end of the threaded rotating rod, the, the sound insulation one-way cylinder is characterized in that the rear side of the lower end of the sound insulation one-way cylinder is fixedly connected with one end of a rotating shaft, the rotating shaft is movably mounted inside a left supporting tube and fixedly connected with a rotating device, and a signal conditioning circuit, a signal selector, a data processing module, a data transmission module and an automatic positioning module are fixedly mounted inside a horizontal operating platform.
Preferably, drive arrangement includes driving motor, drive and rotates wheel, drive wheel, drive pivot and drive gear, the inside top right side fixed mounting of horizontal operation platform has driving motor, the driving motor right side rotates wheel axle center fixed connection with the drive, drive rotates wheel and drive belt lower extreme swing joint, drive belt upper end is passed the inside and the outside swing joint of drive wheel of right bracing piece, drive wheel axle center and drive pivot right-hand member fixed connection, drive pivot left end and the inside left side inner wall fixed connection of the one-way drum that gives sound insulation, drive pivot left side and drive gear axle center fixed connection, drive gear is connected with the meshing of rotating tube lower extreme.
Preferably, the rotating device comprises a rotating motor, a rotating wheel, a rotating transmission wheel and a rotating transmission belt, the rotating motor is fixedly mounted on the left side of the upper portion inside the horizontal operating platform, the left side of the rotating motor is fixedly connected with the axis of the rotating wheel, the rotating wheel is movably connected with the lower end of the rotating transmission belt, the upper end of the rotating transmission belt penetrates through the inside of the left supporting pipe and is movably connected with the outside of the rotating transmission wheel, the axis of the rotating transmission wheel is fixedly connected with the right end of the rotating shaft, and the right end of the rotating shaft is fixedly connected with.
Preferably, the signal conditioning circuit is composed of a current-voltage conversion circuit, an amplifying circuit and a low-pass filter circuit.
Preferably, the signal selector is composed of N analog switches, and can select N paths of input analog signals and output a path of photoelectric signals to be subjected to analog-to-digital conversion.
Preferably, the data processing module is composed of a processor and program software for performing data analysis processing.
A method of operating a directional noise detection analysis apparatus, comprising the steps of:
s1, installing the directional noise monitoring and analyzing device underwater;
s2, starting a driving motor to drive a driving device to operate to drive a rotating pipe to rotate, driving a threaded rotating rod to ascend gradually, synchronizing a laser range finder to ascend until a noise collecting probe ascends to the outside of a sound insulation unidirectional cylinder, then starting an automatic positioning module to drive the rotating motor to swing back and forth to monitor, and when noise in a certain direction is monitored;
s3, starting a driving motor to drive a driving device to operate to drive a rotating pipe to rotate, driving a threaded rotating rod to descend gradually and synchronizing a laser range finder to descend until a noise collecting probe descends into a sound-insulation unidirectional cylinder, then starting the rotating motor to drive a rotating device to drive a rotating shaft to rotate, and aligning an opening of the sound-insulation unidirectional cylinder with a noise source to perform monitoring work;
s4, starting a noise acquisition probe to convert the acquired sound signal quantity into an electric signal quantity;
s5, performing current-voltage conversion, voltage amplification and noise filtering processing on the sound-electricity signal converted by the noise acquisition probe by the starting signal selector, and outputting a voltage signal capable of performing analog-to-digital conversion;
s6, the signal selector performs time division transmission on the analog signals output by the signal conditioning circuits corresponding to all directions;
s7, the data processing module acquires and stores each path of sound and electricity signals in a time-division polling mode, and then the acquired each path of sound and electricity signals are analyzed and processed to obtain noise condition information of the monitoring point;
and S8, the data transmission module outputs the analysis and processing result of the data processing module, and the output information comprises noise decibel, noise source and distance.
Compared with the prior art, the invention provides a directional noise detection and analysis device and an operation method thereof, and the device has the following beneficial effects:
1. the noise acquisition device is compact in overall structure, when the noise acquisition device is used, large-scale detection is firstly carried out and then directional monitoring is carried out, the noise of a fixed point position can be effectively acquired, when the noise acquisition device is specifically operated, large-scale detection is firstly carried out through the noise acquisition probe, judgment is carried out through the laser range finder, adjustment is carried out, most invalid noise can be effectively filtered, accurate and effective noise acquisition is carried out, compared with most devices before, the noise acquisition device is small and exquisite in structure, low in production cost and low in requirements for the noise acquisition probe, and the detection effect of the noise acquisition device is improved through structural promotion, so that the production cost of the noise acquisition device is greatly reduced.
2. When the device is used, the driving motor is started to drive the driving device to operate to drive the rotating pipe to rotate, the threaded rotary rod is driven to ascend step by step, the laser range finder is synchronized to ascend until the noise collection probe ascends to the outside of the sound-insulation unidirectional cylinder, then monitoring work is carried out, after noise in a certain direction is monitored, the driving motor is started to drive the driving device to operate to drive the rotating pipe to rotate, the threaded rotary rod is driven to descend step by step, the laser range finder descends synchronously until the noise collection probe descends to the inside of the sound-insulation unidirectional cylinder, then the rotating device is driven to rotate by starting the rotating motor, the opening of the sound-insulation unidirectional cylinder is aligned to a noise source, and monitoring work is carried out.
Drawings
Fig. 1 is a schematic expanded perspective structure diagram of a directional noise detection and analysis device according to the present invention;
fig. 2 is a schematic perspective view of a directional noise detection and analysis apparatus according to the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a directional noise detection and analysis apparatus according to the present invention;
fig. 4 is an enlarged schematic structural diagram a of the directional noise detection and analysis apparatus according to the present invention;
FIG. 5 is a schematic structural diagram of a method for operating a directional noise detection and analysis apparatus according to the present invention;
FIG. 6 is a schematic diagram of an XYZ coordinate system of the operation method of the directional noise detection and analysis apparatus according to the present invention;
fig. 7 is an angle diagram of XYZ coordinate system illustrating an operation method of the directional noise detection and analysis apparatus according to the present invention.
The reference numbers in the figures illustrate:
the device comprises a connecting rod 1, a sealing tube 2, a threaded rotary rod 3, a sound-proof unidirectional cylinder 4, a fixed tube 5, a laser range finder 6, a noise acquisition probe 7, a left supporting tube 8, a horizontal operating platform 9, a signal conditioning circuit 10, a signal selector 11, a data processing module 12, a data transmission module 13, a driving motor 14, a driving rotating wheel 15, a driving transmission belt 16, a driving transmission wheel 17, a driving rotating shaft 18, a rotating tube 19, a rotating shaft 20, a right supporting tube 21, a rotating transmission wheel 22, a rotating motor 23, a rotating wheel 24, a driving gear 25, a rotating transmission belt 26 and an automatic positioning module 27.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
the directional noise detection and analysis device comprises a horizontal operation table 9, a sound insulation unidirectional cylinder 4, a laser range finder 6, a noise collection probe 7, a left supporting tube 8 and a right supporting tube 21, wherein the front side and the rear side of the middle part of the upper surface of the horizontal operation table 9 are sequentially and fixedly provided with the left supporting tube 8 and the right supporting tube 21, the upper ends of the left supporting tube 8 and the right supporting tube 21 are respectively movably connected with the front side and the rear side of the lower end of the sound insulation unidirectional cylinder 4, a fixed tube 5 is fixedly arranged at the inner lower part of the sound insulation unidirectional cylinder 4, a rotating tube 19 is movably sleeved at the inner lower end of the fixed tube 5, the lower end of the rotating tube 19 is meshed and connected with a driving device, a sealing tube 2 is movably sleeved at the upper end of the fixed tube 5, a threaded rotary rod 3 is movably sleeved at the inner part of the rotating tube 19, the noise, the external lower end of the connecting rod 1 is fixedly connected with the upper end of the laser range finder 6, the rear side of the lower end of the sound-insulation unidirectional cylinder 4 is fixedly connected with one end of a rotating shaft 20, the rotating shaft 20 is movably mounted inside a left supporting tube 8, the rotating shaft 20 is fixedly connected with a rotating device, and a signal conditioning circuit 10, a signal selector 11, a data processing module 12, a data transmission module 13 and an automatic positioning module 27 are fixedly mounted inside a horizontal operating platform 9.
The driving device comprises a driving motor 14, a driving rotating wheel 15, a driving transmission wheel 17, a driving rotating shaft 18 and a driving gear 25, the driving motor 14 is fixedly installed on the right side above the inside of the horizontal operating platform 9, the right side of the driving motor 14 is fixedly connected with the axis of the driving rotating wheel 15, the driving rotating wheel 15 is movably connected with the lower end of a driving transmission belt 16, the upper end of the driving transmission belt 16 penetrates through the inside of the right supporting pipe 21 and is movably connected with the outside of the driving transmission wheel 17, the axis of the driving transmission wheel 17 is fixedly connected with the right end of the driving rotating shaft 18, the left end of the driving rotating shaft 18 is fixedly connected with the inner wall of the left side inside the sound-insulation unidirectional cylinder 4, the left.
The rotating device comprises a rotating motor 23, a rotating wheel 24, a rotating transmission wheel 22 and a rotating transmission belt 26, the rotating motor 23 is fixedly mounted on the left side above the inside of the horizontal operating platform 9, the left side of the rotating motor 23 is fixedly connected with the axis of the rotating wheel 24, the rotating wheel 24 is movably connected with the lower end of the rotating transmission belt 26, the upper end of the rotating transmission belt 26 penetrates through the inside of the left supporting pipe 8 and is movably connected with the outside of the rotating transmission wheel 22, the axis of the rotating transmission wheel 22 is fixedly connected with the right end of the rotating shaft 20, and the right end of the rotating shaft 20 is fixedly connected with.
The signal conditioning circuit 10 is composed of a current-voltage conversion circuit, an amplifying circuit and a low-pass filter circuit; the signal selector 11 is composed of N analog switches, and can select N paths of input analog signals and output an acousto-electric signal which needs analog-to-digital conversion; the data processing module 12 is composed of a processor and program software for performing data analysis processing.
When the device is used specifically, the driving motor 14 is started to drive the driving device to operate to drive the rotating pipe 19 to rotate, the threaded rotary rod 3 is driven to ascend step by step, the laser range finder 6 is driven to ascend synchronously until the noise collection probe 7 ascends to the outside of the sound-insulation unidirectional cylinder 4, then monitoring work is carried out, after noise in a certain direction is monitored, the driving motor 14 is started to drive the driving device to operate to drive the rotating pipe 19 to rotate, the threaded rotary rod 3 is driven to descend step by step, the laser range finder 6 descends synchronously until the noise collection probe 7 descends to the inside of the sound-insulation unidirectional cylinder 4, then the rotating motor 23 is started to drive the rotating device to drive the rotating shaft 20 to rotate, the opening of the sound-insulation unidirectional cylinder 4 is aligned to a noise source, and monitoring work is carried out.
Example 2: the difference is based on example 1;
a method of operating a directional noise detection analysis apparatus, comprising the steps of:
s1, installing the directional noise monitoring and analyzing device underwater;
s2, starting the driving motor 14 to drive the driving device to operate to drive the rotating pipe 19 to rotate, driving the threaded rotary rod 3 to ascend gradually and synchronizing the laser range finder 6 to ascend until the noise collecting probe 7 ascends to the outside of the sound insulation unidirectional cylinder 4, then starting the automatic positioning module 27 to drive the rotating motor 23 to swing back and forth to monitor, and when the noise in a certain direction is monitored;
s3, starting the driving motor 14 to drive the driving device to operate to drive the rotating pipe 19 to rotate, driving the threaded rotary rod 3 to descend gradually, synchronizing the descending of the laser range finder 6 until the noise acquisition probe 7 descends into the sound-insulation unidirectional cylinder 4, then starting the rotating motor 23 to drive the rotating device to drive the rotating shaft 20 to rotate, and aligning the opening of the sound-insulation unidirectional cylinder 4 to a noise source to perform monitoring work;
s4, starting the noise acquisition probe 7 to convert the acquired sound signal quantity into an electric signal quantity;
s5, the starting signal selector 11 carries out current-voltage conversion, voltage amplification and noise filtering processing on the sound-electricity signal converted by the noise acquisition probe 7, and outputs a voltage signal capable of carrying out analog-to-digital conversion;
s6, the signal selector 11 performs time division transmission on the analog signals output by the signal conditioning circuits 10 corresponding to each direction;
s7, the data processing module 12 completes the acquisition and storage of each acoustic-electric signal in a time-division polling mode, and then the acquired acoustic-electric signals are analyzed and processed to obtain the noise condition information of the monitoring point;
s8, the data transmission module 13 outputs the analysis and processing result of the data processing module 12, and the output information includes noise decibel, noise source and distance;
the noise acquisition device is compact in overall structure, when the noise acquisition device is used, large-scale detection is firstly carried out and then directional monitoring is carried out, the noise at a fixed point position can be effectively obtained, when the noise acquisition device is specifically operated, the noise acquisition probe 7 is firstly used for large-scale detection and is judged by the laser range finder 6, adjustment is carried out, most of invalid noise can be effectively filtered, accurate and effective noise acquisition is carried out, compared with most of devices before, the noise acquisition device is small and exquisite in structure, low in production cost and low in requirement on the noise acquisition probe 7, and the detection effect of the noise acquisition device is improved through structural promotion, so that the production cost of the noise acquisition device is greatly reduced.
Example 3: the difference is based on examples 1 and 2;
according to fig. 7, in an XYZ three-dimensional coordinate system, noise transmitted to the noise collecting probe 7 is unidirectional parallel noise, a transmission direction of the noise is a direction SO shown in the figure, and angles between the SO and each coordinate plane of the three-dimensional coordinate system are respectively: the included angle between the sound and current sensor and the XOY plane is & lt SOA, is expressed by alpha, is & lt SOB, is expressed by beta, is & lt SOC, is expressed by gamma, and assumes that the intensity of transmitted sound is E, and the intensity of sound and electricity current induced on the noise acquisition probe 7 is I & ltK & gtE, wherein K is the sound and current induction coefficient of the photoelectric sensor;
then, as shown in fig. 6, because of the difference of the sound transmission angles, the surfaces 1, 2 and 5 are sensing surfaces, the induced currents of the surfaces 3, 4 and 6 are small, and are ignored for convenient demonstration calculation, and then the acoustoelectric current intensity on each sensing surface is:
noodle 1: current 1 ═ I × sin β ═ K × E × sin β;
face 2: current 2 ═ I × sin γ ═ K × E × sin γ;
face 3: current 3 is 0;
face 4: current 4 is 0;
face 5: current 5 ═ I × sin α ═ K × E × sin α;
noodle 6: the current 6 is 0.
After the acoustoelectric current flows through the signal conditioning circuit 10, the output acoustoelectric voltage is:
output of the surface 1 signal conditioning circuit: voltage 1 ═ m ═ K ═ E ═ sin β;
output of the surface 2 signal conditioning circuit: voltage 2 ═ m ═ current 2 ═ m ═ K ═ E ═ sin γ;
output of the surface 3 signal conditioning circuit: voltage 3 is 0;
output of the surface 4 signal conditioning circuit: voltage 4 is 0;
output of the surface 5 signal conditioning circuit: voltage 5 m current 5 m E sin α;
output of the surface 6 signal conditioning circuit: the voltage 6 is 0.
Where m is the current transfer coefficient of the signal conditioning circuit 10
The output voltage of each surface signal conditioning circuit is subjected to analog-to-digital conversion by an analog-to-digital conversion circuit after passing through a signal selector 11; assuming that the quantization bit number of the analog-to-digital conversion circuit is N, the reference voltage is Vref, and assuming that the voltage 1, the voltage 2, the voltage 3, the voltage 4, the voltage 5, and the voltage 6 are all less than the reference voltage Vref, the quantization result of the analog-to-digital conversion circuit on the output voltage of each signal conditioning circuit is:
quantization result of output voltage of the surface 1 signal conditioning circuit:
Y1＝INT[(V1/Vref)*2N]＝INT[(m*K*E*sinβ/Vref)*2N]
quantization of output voltage of the facet 2 signal conditioning circuit:
Y2＝INT[(V2/Vref)*2N]＝INT[(m*K*E*sinγ/Vref)*2N]
quantization of output voltage of the facet 3 signal conditioning circuit:
Y3＝0
quantization of output voltage of the facet 4 signal conditioning circuit:
Y4＝0
quantization of output voltage of the facet 5 signal conditioning circuit:
Y5＝INT[(V5/Vref)*2N]＝INT[(m*K*E*sinα/Vref)*2N]
quantization of output voltage of the facet 6 signal conditioning circuit:
Y6＝0
where INT is the rounded symbol.
Then in the actual operation of the processor, the conversion accuracy problem of the analog-to-digital conversion circuit is ignored, and X is m, K, E2N/Vref；
Can be calculated to
Therefore, the invention can not only measure the sound intensity of the sound point, but also obtain the sound source direction, and detect the distance between the receiving point and the sound source place through the laser range finder 6, thereby calculating the noise magnitude of the sound source place.
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 (7)
1. Directional noise detection analytical equipment, including horizontal operation platform (9), one-way drum (4) give sound insulation, laser range finder (6) and noise acquisition probe (7), its characterized in that: the sound insulation and noise collection device is characterized by further comprising a left supporting tube (8) and a right supporting tube (21), wherein the left supporting tube (8) and the right supporting tube (21) are sequentially and fixedly installed on the front side and the rear side of the middle part of the upper surface of the horizontal operating platform (9), the upper ends of the left supporting tube (8) and the right supporting tube (21) are respectively movably connected with the front side and the rear side of the lower end of the sound insulation unidirectional cylinder (4), a fixed tube (5) is fixedly installed below the inner part of the sound insulation unidirectional cylinder (4), a rotating tube (19) is movably sleeved on the inner part of the lower end of the fixed tube (5), the lower end of the rotating tube (19) is meshed with a driving device, a sealing tube (2) is movably sleeved on the upper end of the fixed tube (5), a threaded rotary rod (3) is movably sleeved on the inner part of the rotating tube (19), a noise collection probe (7) is fixedly installed on the, connecting rod (1) outside lower extreme and laser range finder (6) upper end fixed connection, give sound insulation one-way drum (4) lower extreme rear side and rotatory pivot (20) one end fixed connection, rotatory pivot (20) movable mounting is inside left branch stay tube (8), rotatory pivot (20) and rotary device fixed connection, horizontal operation platform (9) inside fixed mounting has signal conditioning circuit (10), signal selector (11), data processing module (12), data transmission module (13) and automatic positioning module (27).
2. The directional noise detection analysis apparatus according to claim 1, wherein: the driving device comprises a driving motor (14), a driving rotating wheel (15), a driving transmission wheel (17), a driving rotating shaft (18) and a driving gear (25), a driving motor (14) is fixedly arranged at the right side of the upper part in the horizontal operating platform (9), the right side of the driving motor (14) is fixedly connected with the axle center of the driving rotating wheel (15), the driving rotating wheel (15) is movably connected with the lower end of the driving transmission belt (16), the upper end of the driving transmission belt (16) passes through the inside of the right supporting pipe (21) and is movably connected with the outside of the driving transmission wheel (17), the axle center of the driving transmission wheel (17) is fixedly connected with the right end of the driving rotating shaft (18), the left end of the driving rotating shaft (18) is fixedly connected with the inner wall of the left side inside the sound-proof unidirectional cylinder (4), the left side of the driving rotating shaft (18) is fixedly connected with the axis of a driving gear (25), and the driving gear (25) is meshed and connected with the lower end of the rotating pipe (19).
3. The directional noise detection analysis apparatus according to claim 2, wherein: rotating device includes rotating electrical machines (23), rotatory rotation wheel (24), rotatory drive wheel (22) and rotation transmission belt (26), the inside top left side fixed mounting of horizontal operation platform (9) has rotating electrical machines (23), rotating electrical machines (23) left side and rotatory rotation wheel (24) axle center fixed connection, rotatory rotation wheel (24) and rotation transmission belt (26) lower extreme swing joint, the outside swing joint of left stay tube (8) inside and rotation drive wheel (22) is passed to rotation transmission belt (26) upper end, rotatory drive wheel (22) axle center and rotatory pivot (20) right-hand member fixed connection, rotatory pivot (20) right-hand member and the one-way drum (4) lower extreme outside fixed connection that gives sound insulation.
4. The directional noise detection analysis apparatus according to claim 1, wherein: the signal conditioning circuit (10) is composed of a current-voltage conversion circuit, an amplifying circuit and a low-pass filter circuit.
5. The directional noise detection analysis apparatus according to claim 1, wherein: the signal selector (11) is composed of N analog switches, can select N paths of input analog signals and outputs 1 path of photoelectric signals needing analog-to-digital conversion.
6. The directional noise detection analysis apparatus according to claim 1, wherein: the data processing module (12) is composed of a processor and program software for analyzing and processing data.
7. A method of operating a directional noise detection analysis apparatus according to claim 3, comprising the use steps of:
s1, installing the directional noise monitoring and analyzing device underwater;
s2, starting a driving motor (14) to drive a driving device to operate to drive a rotating pipe (19) to rotate, driving a threaded rotating rod (3) to ascend step by step and synchronizing a laser range finder (6) to ascend until a noise collecting probe (7) ascends to the outside of a sound insulation one-way cylinder (4), then starting an automatic positioning module (27) to drive a rotating motor (23) to swing back and forth to monitor, and when noise in a certain direction is monitored;
s3, starting a driving motor (14) to drive a driving device to operate to drive a rotating pipe (19) to rotate, driving a threaded rotating rod (3) to descend gradually, and synchronizing a laser range finder (6) to descend until a noise acquisition probe (7) descends into a sound insulation unidirectional cylinder (4), then starting a rotating motor (23) to drive a rotating device to drive a rotating shaft (20) to rotate, and aligning an opening of the sound insulation unidirectional cylinder (4) to a noise source for monitoring;
s4, starting a noise acquisition probe (7) to convert the acquired sound signal quantity into an electric signal quantity;
s5, the starting signal selector (11) carries out current-voltage conversion, voltage amplification and noise filtering processing on the sound-electricity signal converted by the noise acquisition probe (7), and outputs a voltage signal capable of carrying out analog-to-digital conversion;
s6, the signal selector (11) performs time division transmission on the analog signals output by the signal conditioning circuits (10) corresponding to each direction;
s7, the data processing module (12) completes the acquisition and storage of each path of sound and electricity signals by adopting a time-division polling mode, and then the acquired sound and electricity signals are analyzed and processed to obtain the noise condition information of the monitoring point;
s8, the data transmission module (13) outputs the analysis and processing result of the data processing module (12), and the output information comprises noise decibel, noise source and distance.
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