CN109900349A - A kind of acoustic vibration sensor integration protos test suite PROTOS and its test method - Google Patents
A kind of acoustic vibration sensor integration protos test suite PROTOS and its test method Download PDFInfo
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Abstract
一种声学振动传感器集成测试套件及其测试方法，所述测试套件包括外壳、噪声数据采集模块和处理系统，所述噪声数据采集模块设置在所述外壳内，所述噪声数据采集模块和所述处理系统电连接，所述噪声数据采集模块包括按一定位置关系排布的传声器阵列和加速度传感器。所述声学振动传感器集成测试套件能够准确高效地测量运动物体表面上风压的湍流压力和声学压力，并能直接获得物体表面的振动情况，测试结果的精确度高，且所述声学振动传感器集成测试套件结构简单、布局紧凑，使用方便，极具使用价值。所述测试方法简单便捷。
An acoustic vibration sensor integrated test kit and a test method thereof, the test kit includes a housing, a noise data acquisition module and a processing system, the noise data acquisition module is arranged in the housing, the noise data acquisition module and the The processing system is electrically connected, and the noise data acquisition module includes a microphone array and an acceleration sensor arranged in a certain positional relationship. The acoustic vibration sensor integrated test suite can accurately and efficiently measure the turbulent pressure and acoustic pressure of the wind pressure on the surface of the moving object, and can directly obtain the vibration condition of the object surface, the test results are highly accurate, and the integrated test of the acoustic vibration sensor The kit is simple in structure, compact in layout, convenient in use, and extremely valuable in use. The test method is simple and convenient.
Description
Technical field
The present invention relates to acoustical testing field, in particular to a kind of acoustic vibration sensor integration protos test suite PROTOS and its test
Method.
Background technique
Automotive interior ambient noise-reduction is one of popular research of automobile manufacture industry, and common research means are in related software
In dummy model is established to vehicle structure (such as window structure, shape), and apply the obtained movement of on-the-spot test on model
When turbulent flow pressure harmony pressure, operation result can be passed through and design compartment interior trim etc..Therefore, surface is every when motor racing
The actual test data of pressure is particularly important in Automobile Design, manufacture.Currently, the common solution party in noise testing field
Method is to lay one group of microphone array along movement direction of object, and such measurement method has following defect: 1. are only capable of measuring object
Noise signal caused by flow perturbation when movement, is not effectively separated out turbulent flow pressure dependence parameter；2. composition meets test
The microphone number that the array of demand needs is more, and for cost consideration in practical application, more options are transaudient using low cost
Device, reliability and accuracy are insufficient.And array overall dimensions are larger, are not easy to on-the-spot test use；3. using microphone array
It is only capable of measuring the sound pressure signal of moving object, and the Vibration Condition of body surface can not be directly obtained, test result is not known
Degree is big.
Summary of the invention
The object of the present invention is to provide a kind of acoustic vibration sensor integration protos test suite PROTOSs, for accurately and efficiently measurement fortune
The turbulent flow pressure harmony pressure of wind pressure on animal body surface, and the Vibration Condition of body surface can be directly obtained, improve test
As a result accuracy.
In order to solve the above-mentioned technical problem, the technical scheme is that
A kind of acoustic vibration sensor integration protos test suite PROTOS, including shell, noise data acquisition module and processing system, institute
It states noise data acquisition module to be arranged in the shell, the noise data acquisition module and the processing system pass through transmission
The noise data transmission of acquisition to the processing system is carried out noise data by electric wire electrical connection, the noise data acquisition module
Storage and analysis.
The noise data acquisition module includes microphone array and acceleration transducer.The shell includes the upper of fastening
Lid and lower cover, in the upper cover, the acceleration transducer is arranged in the lower cover, the upper cover for the microphone array setting
It perforates with being equipped at lower cover fastening, is worn described in the transmission electric wire process for being separately connected the microphone array and acceleration transducer
Hole connects the processing system.
The microphone array includes four identical microphones positioned at same level, is the first microphone, second
Microphone, third microphone and four-microphone, wherein the first microphone, the second microphone and third microphone are straight in isosceles
Angle Triangle-Profile, the distance between two microphones on waist are the diameter length of microphone, the four-microphone
The position that any microphone is D is set in first microphone, the second microphone and third microphone, and the D is not
Less than the minimum wavelength λ within the scope of measurement frequency, whereinC indicates the velocity of sound, and f indicates the frequency of test.The upper cover
If the inside of the upper cover is arranged in the microphone there are four corresponding through-hole, the pickup part setting of the microphone exists
In the through-hole, the noise of the upper outer side of lid is picked up.The acceleration transducer is arranged in the lower cover, and be located at it is described under
The center of lid.The control system is computer.
The invention also discloses the test methods of above-mentioned acoustic vibration sensor integration protos test suite PROTOS, include the following steps:
S1: acoustic vibration sensor integration protos test suite PROTOS is arranged on test object surface；
S2: setting object kinematic parameter records the data of noise data acquisition module acquisition in object of which movement, completes primary
Test；
S3: adjustment object of which movement parameter repeats step S1 and S2, tests out noise data under different motion parameter, completes
Test, and test data is analyzed.
Compared with prior art, the invention has the following advantages that the acoustic vibration sensor integration protos test suite PROTOS can
The turbulent flow pressure harmony pressure of wind pressure on surface of moving object is accurately and efficiently measured, and the vibration of body surface can be directly obtained
The accuracy of emotionally condition, test result is high, and the acoustic vibration sensor integration protos test suite PROTOS structure is simple, compact layout,
It is easy to use, great use value.The test method is simple and convenient.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, shape and proportional sizes of each component in figure etc. are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings:
Fig. 1 and Fig. 2 is the structural schematic diagram of the acoustic vibration sensor integration protos test suite PROTOS of a specific embodiment of the invention；
Fig. 3 is the acoustic stress instrumentation plan of a specific embodiment of the invention；
Fig. 4 is the turbulent flow pressure instrumentation plan of a specific embodiment of the invention.
Described in figure: the first microphone of 1-, the second microphone of 2-, 3- third microphone, 4- four-microphone, 5- acceleration
Sensor, 6- through-hole, 7- perforation, 8- upper cover, 9- lower cover.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Fig. 1 and Fig. 2, a kind of acoustic vibration sensor integration protos test suite PROTOS, including shell, noise data acquisition module
And processing system, the noise data acquisition module are arranged in the shell, the noise data acquisition module and the place
Reason system is electrically connected by transmission electric wire, and the noise data acquisition module is by the noise data transmission of acquisition to the processing system
System carries out the storage and analysis of noise data.
The shell includes the upper cover 8 fastened and lower cover 9, and the upper cover 8 is truncated cone-shaped, and the lower cover 9 is planar shaped.
The noise data acquisition module includes microphone array and acceleration transducer 5.The microphone array setting
In the upper cover 8, specifically, being located in the plane of the upper cover 8, the acceleration transducer 5 is arranged in the lower cover 9, institute
It states and is equipped with a perforation 7 at the fastening of upper cover 8 and lower cover 9, be separately connected the transmission of the microphone array and acceleration transducer 5
Electric wire is by the 7 connection processing system of perforation.
The microphone array includes four identical microphones positioned at same level, is the first microphone 1, second
Microphone 2, third microphone 3 and four-microphone 4, wherein the first microphone 1, the second microphone 2 and third microphone 3 are in
Isosceles right triangle distribution, the distance d of microphone between any two on waist are the diameter of microphone, and the described 4th is transaudient
The position that any microphone distance is D is arranged in first microphone 1, the second microphone 2 and third microphone 3 in device 4
It sets, the D is not less than the minimum wavelength λ within the scope of measurement frequency, whereinC indicates the velocity of sound, and f indicates the frequency of test
Rate, the upper limit of the frequency of test are 9.5kHz.The through-hole of corresponding four microphones there are four being set in the plane of the upper cover 8
6, the inside of the upper cover 8 is arranged in the microphone, and the pickup part setting of the microphone picks up institute in the through-hole 8
State the acoustic signal in 8 outside of upper cover.The acceleration transducer 5 is arranged in the lower cover 9, and is located at the center of the lower cover 9
Position.The control system is computer.
In the present embodiment, select diameter itself for the microphone of 6.35mm, first microphone 1,2 and of the second microphone
Third microphone 3 is distributed in isosceles right triangle, the distance between microphone on waist d=6.35mm, two-by-two in groups,
It is considered as three groups of microphones pair, in order to save space, the four-microphone is arranged on the middle line of bevel edge, and two on middle line
The distance between a microphone D=35.9mm, at this point, the velocity of sound c=340m/s in air, test frequency f=9.5kHz are taken,
Meet the upper limit no more than 9.5kHz.
The acoustic vibration sensor integration protos test suite PROTOS is as follows using the principle that four microphones form microphone array:
Fluid pressure on high-speed moving object surface can be divided into turbulent flow pressure harmony pressure, both pressure components
Speed is different, and THE VELOCITY OF SOUND IN AIR c is about 340m/s, and turbulent flow pressure x velocity (convection velocity) is related with speed of moving body, leads to
Chang Weizhi.The speed of turbulent flow pressure in particular directions can be calculated by the pressure signal that microphone measures in the microphone
Degree, to distinguish turbulent flow pressure harmony pressure.
Referring to Fig. 3, firstly, since velocity of sound c is biography known, that wind speed noise is D by two distances in motion process
The time difference of sound device is τ, is direction (i.e. folder of the acoustic pressure component relative to surface of moving object that can determine Acoustic Wave Propagation by following formula
Angle θ):
Referring to fig. 4, for turbulent flow pressure, speed and angle in formula (1) are unknown quantitys, therefore measure turbulent flow pressure
It needs signal delay time to be measured in two mutually perpendicular directions respectively, if first microphone with three microphones
It is the direction x with the second microphone line direction, the line direction of the first microphone and third microphone is the direction y, in x and the side y
Signal delay time τ is measured upwardsxAnd τyIf turbulent convection speed is u, the angle with the direction y is that β passes through following equation with two unknowns
You can get it turbulent flow pressure convection velocity and the direction of propagation:
The acceleration transducer can measure the Vibration Parameters such as the velocity and acceleration of movement.The microphone array and
The data of acceleration transducer acquisition are transmitted to the processing system, and the processing system is according to the data of the microphone array
Isolate turbulent flow pressure harmony pressure, after then being loaded in a model, obtain the Vibration Parameter of model, by with it is described
The Vibration Parameter that acceleration transducer measurement obtains compares, and is modified to separation method, obtains accurate turbulent flow pressure harmony
Learn pressure.
Further, in order to reduce invalid noise signal caused by surrounding air sinuous flow in measurement, existed using the windproof enclosure
On the protos test suite PROTOS.
When being tested using the acoustic vibration sensor integration protos test suite PROTOS,
S1: the acoustic vibration sensor integration protos test suite PROTOS is arranged in the surface of moving object of test, by external member
Lower cover abutting is fixed on surface of moving object.
S2: being arranged the kinematic parameter of moving object, and object setting in motion records noise data acquisition module acquisition in operation
Data, complete primary test.
S3: adjusting the kinematic parameter of moving object, repeats step S1 and S2, tests out noise number under different operating parameters
According to, completion test, and test data is analyzed.Specifically, data of the processing system according to the microphone array
Isolate turbulent flow pressure harmony pressure, after then being loaded in a model, obtain the Vibration Parameter of model, by with it is described
The Vibration Parameter that acceleration transducer measurement obtains compares, and is modified to separation method, obtains accurate turbulent flow pressure harmony
Learn pressure.
The main advantage of the acoustic vibration sensor integration protos test suite PROTOS is as follows:
(1) specific position distributed combination is pressed using 4 sonic transducers and 1 accelerometer, it can easily and fast, effectively
Ground separation, the turbulent flow pressure signal harmony pressure signal (sound pressure measurement upper frequency limit 9.5kHz) for testing surface of moving object.
(2) sensor suite compact layout, easy to use, great practical value.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be apparent for a person skilled in the art
's.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to preceding claims and these
The full scope of the equivalent that claim is possessed determines.For comprehensive purpose, all articles and with reference to including patent
The disclosure of application and bulletin is all by reference to being incorporated herein.Appointing for theme disclosed herein is omitted in preceding claims
Where face is not intended to abandon the body matter, also should not be considered as applicant and the theme is not thought of as to disclosed hair
A part of bright theme.
Claims (10)
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Cited By (2)
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| CN115047080A (en) * | 2022-05-06 | 2022-09-13 | 国网山西省电力公司电力科学研究院 | Acoustic imager accuracy testing method and device |
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Application publication date: 20190618 |