CN113701870A - Three-dimensional sound field measuring method and device - Google Patents

Abstract

Translated fromChinese

本发明涉及声场测量领域，更具体地涉及三维声场测量方法和装置，具体步骤包括驱动换能器发射声波；驱动主控制器确定水听器的移动路径，该移动路径由若干坐标点组成；驱动三轴运动机构带动水听器按移动路径进行移动，每移动到一个坐标点时，控制角度调节器调节水听器角度至与换能器的探头位于同一轴线上；驱动水听器对每个坐标点处的声波进行采集；驱动电子测量仪器接收水听器采集到的声波信号并进行处理，得到每个坐标点处的声压值，本申请可对水听器位置进行调节，保证其可与换能器的探头位于同一轴线上，提高测量准确率，且可对发射球面波的换能器进行声场测量，降低使用局限性。

The invention relates to the field of sound field measurement, and more particularly to a three-dimensional sound field measurement method and device. The specific steps include driving a transducer to emit sound waves; driving a main controller to determine a moving path of a hydrophone, and the moving path is composed of several coordinate points; driving The three-axis motion mechanism drives the hydrophone to move according to the moving path. When it moves to a coordinate point, the angle adjuster is controlled to adjust the angle of the hydrophone to be on the same axis as the probe of the transducer; The sound wave at the coordinate point is collected; the electronic measuring instrument is driven to receive the sound wave signal collected by the hydrophone and process it to obtain the sound pressure value at each coordinate point. The application can adjust the position of the hydrophone to ensure that it can be The probe of the transducer is located on the same axis, which improves the measurement accuracy, and can measure the sound field of the transducer that emits spherical waves, reducing the limitations of use.

Description

Three-dimensional sound field measuring method and device

Technical Field

The invention relates to the field of sound field measurement, in particular to a three-dimensional sound field measurement method and device.

Background

The ultrasonic transducer is widely applied to an ultrasonic detection system, so that the acquisition of the distribution information of the sound field of the ultrasonic transducer is very important, the existing measurement means is that a function generator is mainly used for driving the transducer to be detected to emit sound waves in a test box filled with solution, a hydrophone is used as a measurement tool for collecting the sound waves emitted by the transducer, the sound field characteristic distribution of the transducer is obtained by planning the path of the collected sound waves by a user, the probe focal length measurement and the probe optimum frequency measurement are carried out on the transducer, and the characteristic detection and the calibration of the transducer are realized.

However, in the actual installation process, it is difficult to ensure that the hydrophone and the probe of the transducer are perpendicular, and especially when the sound field measurement is performed in the horizontal direction, it is more difficult to ensure that the hydrophone and the probe of the transducer are on the same axis due to the installation error, so that the measurement structure of the sound field is prone to have errors, and the measurement result is inaccurate.

In addition, the existing transducer measuring device can only measure the sound field of a transducer which emits plane waves and is provided with one probe, and a hemispherical transducer which has a plurality of probes and can emit spherical waves exists in the market, so that the existing transducer measuring device can not measure the sound field of the hemispherical transducer due to different angles of a plurality of sound waves emitted by the hemispherical transducer, and has higher use limitation.

In summary, there is a need for an effective solution to the problems in the related art.

Disclosure of Invention

Based on this, this application provides one kind can adjust hydrophone position, guarantees that it can be located the same axis with the probe of transducer, improves and measures the rate of accuracy, and can carry out the sound field measurement to the transducer that launches spherical wave, reduces three-dimensional sound field measurement method and device that uses the limitation.

In a first aspect, the present application provides a three-dimensional sound field measurement method, including the following steps:

acquiring the transmitting sound wave of the transducer, wherein the main controller controls the data signal generator to generate an electric signal with any waveform, and the transducer converts the electric signal into an ultrasonic signal and sends the ultrasonic signal;

planning a moving path of the hydrophone based on the transmitted sound wave, wherein the moving path consists of a plurality of coordinate points, the main controller firstly determines the plane information to be scanned, the scanning range and the scanning resolution, then generates a plurality of point coordinate information according to the information, and after the initial coordinate point is determined, the initial coordinate point is connected with the other coordinate points one by one to form moving path information so that the subsequent hydrophone collects the sound wave from the initial coordinate point along one coordinate point of the moving path;

driving the hydrophone to move along the moving path, adjusting the angle of a receiving head of the hydrophone to be on the same axis with a probe of the transducer when the hydrophone moves to a coordinate point, and acquiring a sound wave value acquired by the hydrophone at the coordinate point;

and processing the collected sound waves to obtain a sound pressure value at each coordinate point, wherein the sound waves collected by the hydrophone are displayed through an electronic measuring instrument.

In one possible implementation, the method further includes: and calculating an included angle between the hydrophone receiving head and the transducer probe at each coordinate point to obtain angle information of the hydrophone, which needs to be adjusted, at the corresponding coordinate point.

In one possible implementation, the transducer is a three-dimensional ultrasonic transducer, and the acoustic wave is a spherical wave.

In a possible implementation manner, the hydrophone is driven to move by the three-axis movement mechanism, and when the hydrophone moves to the coordinate point, the main controller gives a signal to the angle adjuster, so that the angle adjuster drives the hydrophone to rotate.

In a second aspect, the application provides a three-dimensional sound field measuring device, which is suitable for measuring a three-dimensional sound field of a transducer arranged in a container, and comprises a hydrophone, a main controller, an electronic measuring instrument connected with the main controller, a data signal generator and a three-axis movement mechanism, wherein the main controller is communicated with and controls an angle regulator on the three-axis movement mechanism and the three-axis movement mechanism, the hydrophone is arranged on the angle regulator and is close to the transducer, the main controller controls the data signal generator to generate a high-frequency electric signal with any waveform, the transducer converts the high-frequency electric signal into an ultrasonic signal, and the electronic measuring instrument collects the received sound wave of the hydrophone and transmits the collected sound wave to the main controller.

In a possible implementation manner, the angle adjuster at least includes a first adjuster for adjusting the horizontal angle of the hydrophone and a second adjuster for adjusting the longitudinal angle of the hydrophone, the first adjuster and the second adjuster are connected to each other, the angle of the hydrophone in the horizontal direction can be adjusted by the first adjuster, and the angle of the hydrophone in the vertical direction can be adjusted by the second adjuster.

In a possible implementation manner, the three-axis motion mechanism comprises a transverse moving mechanism arranged on an X axis, a longitudinal moving mechanism arranged on a Y axis and a vertical moving mechanism arranged on a Z axis which are connected with each other, and through the coordination control of the transverse moving mechanism, the longitudinal moving mechanism and the vertical moving mechanism, the hydrophone can move in a three-dimensional direction in the container so as to complete the characteristic measurement of the ultrasonic probe.

In a possible implementation manner, a transverse limiter limiting the transverse movement range of the hydrophone is arranged on the transverse moving mechanism, a longitudinal limiter limiting the longitudinal movement range of the hydrophone is arranged on the longitudinal moving mechanism, a vertical limiter limiting the vertical movement range of the hydrophone is arranged on the vertical moving mechanism, the limiter can limit the maximum movement range of the hydrophone, and the hydrophone is protected from impact loss due to exceeding the range.

In one possible implementation mode, the hydrophone further comprises a handle connected with the three-axis movement mechanism through the main controller, and the handle is used for controlling the movement of the hydrophone in the three-dimensional direction in the container, so that an operator can move the hydrophone and see the position of the hydrophone in the water tank.

In a possible implementation manner, the hydrophone and the transducer are both located in a container, the container comprises an experimental water tank and a fixed water tank installed in the experimental water tank, the transducer is installed on the fixed water tank, and the hydrophone is located between the experimental water tank and the fixed water tank.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

1. the hydrophone can move along the directions of an X axis, a Y axis and a Z axis through the three-axis movement mechanism, so that the scanning of the three-dimensional space of the hydrophone is realized, the angle of the hydrophone can be adjusted to be on the same axis with the probe of the transducer through the angle adjuster, the acquisition effect of the hydrophone is ensured, and the measurement accuracy is improved;

2. according to the method and the device, the angle of the hydrophone in the horizontal direction is adjusted through the first adjuster, the angle of the hydrophone in the vertical direction is adjusted through the second adjuster, so that the hydrophone can collect sound waves at various angles, sound field measurement can be conveniently carried out on the transducer emitting spherical waves, and the use limitation is reduced;

3. the method and the device can calculate the included angle between the hydrophone and the transducer according to the coordinate position of the measuring point of the hydrophone in advance, obtain the angle information of the hydrophone which needs to be adjusted at the corresponding coordinate point, conveniently adjust the angle according to the information after the hydrophone moves to the position of the corresponding coordinate point, automatically compensate the measuring error possibly existing in the hydrophone, and further ensure that the probe of the hydrophone and the probe of the transducer are located on the same axis.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the structure between a hydrophone and a container;

fig. 3 is a schematic structural diagram of a triaxial moving mechanism and a hydrophone.

The reference numbers in the figures illustrate: 1. a hydrophone; 2. a transducer; 3. a main controller; 4. an electronic measurement instrument; 5. a data signal generator; 6. a three-axis motion mechanism; 61. a lateral movement mechanism; 611. a transverse limiter; 612. a transverse guide rail seat; 613. a transverse motor; 614. a transverse moving seat; 62. a longitudinal movement mechanism; 621. a longitudinal stop; 622. a longitudinal moving seat; 63. a vertical moving mechanism; 631. a vertical stopper; 632. a vertical motor; 7. an angle adjuster; 71. a first motor; 72. a second motor; 8. a handle; 9. an experimental water tank; 10. the water tank is fixed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other examples, which can be obtained by a person skilled in the art without making any inventive step based on the examples in this application, are within the scope of protection of this application.

It should be understood by those skilled in the art that the electrical components presented in the present document are electrically connected to an external master controller and 220V mains, and the master controller may be a computer or other conventional known devices for controlling, and the host computer software used in the present invention is a three-dimensional sound field measurement system host computer software, 3d dsp (3 dimensional ultra sound Pressure Mapping), and in the present disclosure, unless otherwise defined, technical terms or scientific terms used in the claims and the specification shall have the ordinary meaning understood by those skilled in the art to which the present invention belongs. "connected" or "coupled" and like terms are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect; "and/or" describes the association relationship of the associated objects, indicating that three relationships may exist; the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing 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 in a particular orientation, and be used in a particular manner without limitation.

As shown in fig. 1 to 3, to solve the above problems, an embodiment of the present invention provides a three-dimensional sound field measuring method, including the steps of:

acquiring the transmitting sound wave of thetransducer 2, wherein themain controller 3 gives a signal to thedata signal generator 5 to enable thedata signal generator 5 to generate an electric signal with any waveform, and thetransducer 2 converts the electric signal into an ultrasonic signal and sends the ultrasonic signal;

planning a moving path of thehydrophone 1 based on the emitted sound waves and the position of thehydrophone 1, wherein the moving path consists of a plurality of coordinate points, specifically, amain controller 3 firstly determines a plane to be scanned, namely an XY plane, a YZ plane or an XZ plane, the scanning range is a rectangle with a plurality of large areas, two side lengths and scanning resolution ratios of the rectangle are defined, namely the stepping length in each direction are selected, after the determination, upper computer software generates a plurality of point coordinate information according to the information, and after the determination of an initial coordinate point, the initial coordinate point is connected with other coordinate points one by one to form moving path information so that thesubsequent hydrophone 1 can collect sound waves from the initial coordinate point and along one coordinate point of the moving path;

the three-axis movement mechanism 6 is driven to drive thehydrophone 1 to move according to a movement path, at the moment, the three-axis movement mechanism 6 can be controlled by themain controller 3 to move thehydrophone 1, the three-axis movement mechanism 6 can also be controlled by the handle 8 to rapidly move thehydrophone 1, the three-dimensional space scanning of thehydrophone 1 is realized, and when thehydrophone 1 moves to a coordinate point, theangle regulator 7 is controlled to regulate the angle of a receiving head of thehydrophone 1 to be positioned on the same axis as a probe of thetransducer 2, so that the acquisition effect of thehydrophone 1 is ensured;

thehydrophone 1 is driven to collect sound waves at each coordinate point, collected ultrasonic signals are converted into electric signals and then sent to the electronic measuring instrument 4, the electronic measuring instrument 4 forms a waveform diagram after receiving the electric signals at each coordinate point to display the waveform of each collected sound wave, each coordinate point has self three-dimensional space information, therefore, the ultrasonic signals collected by thehydrophone 1 at the coordinate point are processed by an oscilloscope to obtain a sound pressure value, wherein the ultrasonic signals are the electric signals collected by the oscilloscope at first, then peak values are obtained or Fourier transformation is carried out to find amplitude values of corresponding frequency points, the voltage amplitude values can be converted into sound pressure values through a function, and the sound pressure values can be converted into three-dimensional sound fields in one-to-one correspondence with the three-dimensional coordinate information;

in a possible implementation manner, the method further includes: themain controller 3 is driven to calculate an included angle between thehydrophone 1 and thetransducer 2 at each coordinate point, wherein thetransducer 2 has a central point and a normal direction, a receiving head of thehydrophone 1 is also a point, an included angle between a connecting line of the receiving head of thehydrophone 1 and the central point and the normal direction of thetransducer 2 is an included angle between thehydrophone 1 and thetransducer 2 at each coordinate point, mathematically, the included angle is an included angle between two vectors, angle information required to be adjusted at the corresponding coordinate point of thehydrophone 1 can be obtained based on the included angle information, the angle can be adjusted according to the corresponding angle information after thehydrophone 1 moves to the position of the corresponding coordinate point, measurement errors possibly existing in thehydrophone 1 are automatically compensated, and the fact that the angle of thehydrophone 1 and a probe of thetransducer 2 can be located on the same axis is further guaranteed.

In addition, because the hydrophones are all corrected when being shipped, extra corrected parameters alpha and beta can be obtained by using least square according to a Dp (theta) value table and a theta value table given by a manufacturer, and in actual operation, the following direct response function can be obtained:

wherein, J₁Is a first order Bessel function, k is the wavenumber, a is the hydrophone radius, and θ is the angle between the hydrophone and the transducer center at the measurement point.

According to the function, a user can input the frequency of the transmitted signal and information such as the included angle between the hydrophone and the center point of the transducer at the current measuring point, so that the relative amplitude Dp (theta) corresponding to the angle can be calculated, and then the sound pressure value measured at the measuring point is divided by the relative amplitude of the point to obtain a corrected sound pressure value, so that the influence on the angle of the hydrophone is removed.

In a possible implementation, thetransducer 2 is a three-dimensional ultrasonic transducer, and the sound wave is a spherical wave.

In a second aspect, the present application provides a three-dimensional sound field measuring apparatus, which is suitable for measuring a three-dimensional sound field of a transducer placed in a container, and includes a hydrophone 1, a main controller 3, an electronic measuring apparatus 4 connected to the main controller 3, a data signal generator 5, and a three-axis movement mechanism 6, wherein the main controller 3 is a general-purpose computer and has corresponding upper computer software installed therein, the main controller 3 is communicated with and controls the three-axis movement mechanism 6 and an angle adjuster 7 on the three-axis movement mechanism 6, the hydrophone 1 is disposed on the angle adjuster 7 and is disposed close to the transducer 2, the data signal generator 5 generates a high-frequency electrical signal having any waveform, the transducer 2 converts the high-frequency electrical signal into an ultrasonic signal, the data signal generator 5 is a waveform generator, the electronic measuring apparatus 4 collects a received sound wave of the hydrophone 1 and transmits the collected sound wave to the main controller 3, the electronic measuring instrument 4 adopts an oscilloscope, wherein the hydrophone 1 and the transducer 2 are both positioned in a container, when in use, solution is input into the container, and sound waves emitted by a probe on the transducer 2 are collected through the hydrophone 1, so that the characteristics of the transducer 2 are detected and calibrated.

In a possible implementation manner, theangle adjuster 7 at least includes a first adjuster for adjusting the transverse angle of thehydrophone 1 and a second adjuster for adjusting the longitudinal angle of thehydrophone 1, wherein the first adjuster can be selected from afirst motor 71 and a first connecting seat mounted on a motor shaft of thefirst motor 71, the second adjuster can be selected from asecond motor 72 and a second connecting seat mounted on a motor shaft of thesecond motor 72, thefirst motor 71 is mounted on the three-axis moving mechanism 6, thesecond motor 72 is mounted on the first connecting seat, the motor shaft of thesecond motor 72 is perpendicular to the motor shaft of thefirst motor 71, thehydrophone 1 is connected with the motor shaft of thesecond motor 72 through the second connecting seat, the first connecting seat is controlled to rotate by the motor shaft of thefirst motor 71, the horizontal angle of thehydrophone 1 can be adjusted, the second connecting seat is controlled to rotate by the motor shaft of thesecond motor 72, the angle of thehydrophone 1 in the vertical direction can be adjusted.

In a possible implementation manner, the three-axis movement mechanism 6 includes atransverse movement mechanism 61 arranged on the X axis, alongitudinal movement mechanism 62 arranged on the Y axis, and a vertical movement mechanism 63 arranged on the Z axis, two sides of thetransverse movement mechanism 61 are respectively connected with a moving end of the vertical movement mechanism 63 and a moving end of thelongitudinal movement mechanism 62, theangle adjuster 7 is installed on thetransverse movement mechanism 61, when the angle adjuster is installed, the vertical movement mechanism 63 can be movably installed on an external mounting rack, thelongitudinal movement mechanism 62 can be movably installed in the external mounting rack or container, so that when thelongitudinal movement mechanism 62 drives thetransverse movement mechanism 61 to move, the vertical movement mechanism 63 also moves along with the vertical movement mechanism, when the vertical movement mechanism 63 drives thetransverse movement mechanism 61 to move, thelongitudinal movement mechanism 62 also moves along with the vertical movement mechanism, and thus realizing that one movement mechanism can drive the other two movement mechanisms to move, and then, scanning of the three-dimensional space of thehydrophone 1 is realized so as to complete the characteristic measurement of the ultrasonic probe.

It is worth mentioning that, be equipped with thehorizontal stopper 611 ofinjecing hydrophone 1 lateral movement scope on thelateral shifting mechanism 61, be equipped with thevertical stopper 621 ofhydrophone 1 longitudinal movement scope on thelongitudinal shifting mechanism 62, be equipped with thevertical stopper 631 ofinjecing hydrophone 1 vertical movement scope on the vertical shifting mechanism 63, the maximum movement scope ofhydrophone 1 can be injecied to the stopper,protection hydrophone 1 can not exceed the scope and the loss of impact, in addition, can be connected with detachable mode between stopper and the moving mechanism, make the position of stopper on the moving mechanism adjust, then realize the control tohydrophone 1 maximum movement scope.

Wherein, the transverse movingmechanism 61 comprises a transverseguide rail seat 612, atransverse motor 613 and a transverse movingseat 614, the longitudinal movingmechanism 62 comprises a longitudinal guide rail seat, a longitudinal motor and a longitudinal movingseat 622, the vertical moving mechanism 63 comprises a vertical guide rail seat, avertical motor 632 and a vertical moving seat, thetransverse motor 613, the longitudinal motor and thevertical motor 632 are respectively installed on the transverseguide rail seat 612, the longitudinal guide rail seat and the vertical guide rail seat, the transverseguide rail seat 612 is provided with a transverse screw rod rigidly connected with thetransverse motor 613, the longitudinal guide rail seat is provided with a longitudinal screw rod rigidly connected with the longitudinal motor, the vertical guide rail seat is provided with a vertical screw rod rigidly connected with thevertical motor 632, the transverse movingseat 614 is in threaded connection with the transverse screw rod, the longitudinal movingseat 622 is in threaded connection with the longitudinal screw rod, the vertical moving seat is in threaded connection with the vertical screw rod, when the motor drives the screw rod to rotate, the movable seat can move on the screw rod through the threaded structure, and then the position of thehydrophone 1 is adjusted.

In addition, thehorizontal limiters 611 are respectively arranged at two sides of the horizontalguide rail seat 612, the limiting ends of the horizontal movingseat 614 are positioned between two adjacenthorizontal limiters 611, thelongitudinal limiters 621 are respectively arranged at two sides of the longitudinal guide rail seat, the limiting ends of the longitudinal movingseat 622 are positioned between two adjacentlongitudinal limiters 621, thevertical limiters 631 are respectively arranged at two sides of the vertical guide rail seat, the limiting ends of the vertical moving seat are positioned between two adjacentvertical limiters 631, and the limiters are arranged at two ends of the guide rail seat to limit the maximum moving range function of thehydrophone 1 and protect thehydrophone 1 from exceeding the range and impact loss.

In a possible implementation manner, the three-axis hydrophone controller further comprises a handle 8 connected with the three-axis movement mechanism 6 through themain controller 3, namely the handle 8 is connected with a movement control module on themain controller 3, so that themain controller 3 can directly control thehydrophone 1 through upper computer software in the main controller, and the movement of thehydrophone 1 in the three-dimensional direction in a container can be controlled through the handle 8, so that an operator can move thehydrophone 1 and see the position of thehydrophone 1 in the water tank, wherein the upper computer software installed in themain controller 3 can read a control signal of the handle 8 through a USB serial port in real time and process the control signal, and meanwhile, the handle 8 can also send an instruction to themain controller 3 through the USB serial port to control the movement direction and speed of a motor in the three-axis movement mechanism 6.

In a possible implementation, the container includesexperiment water tank 9 and fixedwater tank 10, fixedwater tank 10 is installed insideexperiment water tank 9,transducer 2 installs on fixedwater tank 10,hydrophone 1 is located betweenexperiment water tank 9 and the fixedwater tank 10, make this application also can measure non-water logging formula transducer through this mounting means, fixedwater tank 10 can protect non-water logging formula transducer, avoidtransducer 2's circuit to be submerged, the application scene has been expanded, in addition, if use and set up the structure that is used for fixed transducer shelf in big water tank, then in order to avoid intaking, non-water logging formula transducer can only be located big water tank top, lead to non-water logging formula transducer can only down the transmission sound wave, hydrophone measuring direction can only be facing to the top, the structure is complicated.

When the three-dimensional sound field measuring device is used, all the components are connected, then a user selects the type of test on host computer software of a main controller 3, namely, the linear sound pressure test in 3 directions of an X direction, a Y direction and a Z direction of the transducer 2 is selected, or the surface sound pressure test of 3 orthogonal planes of an XY plane, a YZ plane and an XZ plane of the transducer 2 is selected, when the linear sound pressure test is carried out, the specific moving length and step length are selected through the host computer software, then the main controller 3 controls a data signal generator 5 to generate an electric signal with any waveform, the transducer 2 converts the electric signal into an ultrasonic signal and sends the ultrasonic signal, then a three-axis motion mechanism controls a hydrophone 1 to move to a position opposite to a probe of the transducer 2, after a collecting end of the hydrophone 1 and the probe of the transducer 2 are positioned on the same axis, sound waves sent by the probe of the transducer 2 are collected through the hydrophone 1, the acquired sound waves are sent to the electronic measuring instrument 4, the electronic measuring instrument 4 processes the sound wave signals acquired by the hydrophone 1 after receiving the sound wave signals, and the obtained sound pressure value is displayed; when a surface sound pressure test is carried out, firstly, the hydrophone 1 is moved to the position near an array element to be tested, then, whether a two-dimensional plane to be scanned is an XY plane, a YZ plane or an XZ plane is determined, whether a scanning range is a rectangle with a large area or not is determined, namely, two side lengths are defined, step lengths in all directions are determined, path information consisting of a plurality of coordinate points is generated according to the parameters, the hydrophone 1 subsequently measures the path information generated according to a program one point by one point to generate a three-dimensional sound field diagram, meanwhile, in the process, the main controller 3 can calculate an included angle between the hydrophone 1 and the transducer 2 at each coordinate point according to upper computer software in the main controller to obtain angle information needing to be adjusted at the corresponding coordinate point of the hydrophone 1, after the three-axis movement mechanism 6 controls the hydrophone 1 to move to the position of the corresponding coordinate point, the angle adjuster adjusts the angle according to the corresponding angle information, the normal direction of the hydrophone 1 is consistent with the linear direction of the measuring point and the center of the transducer, then in order to eliminate the problem that the sensitivity of the hydrophone 1 has directivity, angle compensation can be still carried out on the acquired signals, the hydrophone 1 collects sound waves one point by one point along a plurality of coordinate points in path information subsequently, the sound pressure value of each coordinate point is sent to the electronic measuring instrument 4, and a waveform diagram formed by the sound pressure values of the coordinate points is displayed by the electronic measuring instrument 4.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A three-dimensional sound field measuring method is characterized in that: the method comprises the following steps:

acquiring the emitted sound wave of the transducer (2);

planning a movement path of the hydrophone (1) based on the transmitted sound waves, wherein the movement path is composed of a plurality of coordinate points;

driving the hydrophone (1) to move along the moving path, adjusting the angle of a receiving head of the hydrophone (1) to be on the same axis with a probe of the transducer (2) when the hydrophone moves to a coordinate point, and acquiring a sound wave value acquired by the hydrophone (1) at the coordinate point;

and processing the collected sound waves to obtain the sound pressure value at each coordinate point.

2. The three-dimensional sound field measuring method according to claim 1, characterized in that: the method further comprises the following steps: and calculating an included angle between a receiving head of the hydrophone (1) and a probe of the transducer (2) at each coordinate point to obtain angle information of the hydrophone (1) needing to be adjusted at the corresponding coordinate point.

3. The three-dimensional sound field measuring method according to claim 1, characterized in that: the transducer (2) is a three-dimensional ultrasonic transducer, and the sound wave is spherical wave.

4. The three-dimensional sound field measuring method according to claim 1, characterized in that: the hydrophone (1) is driven to move by the three-axis movement mechanism (6), and when the hydrophone (1) moves to a coordinate point, the main controller (3) gives a signal to the angle regulator (7) to enable the angle regulator (7) to drive the hydrophone (1) to rotate.

5. The three-dimensional sound field measuring method according to claim 1, characterized in that: the coordinate point is determined by the scanning plane information, the scanning range information, and the scanning resolution information set by the main controller 3.

6. A three-dimensional sound field measuring device is suitable for measuring a three-dimensional sound field of a transducer arranged in a container, and is characterized in that: including hydrophone (1), main control unit (3) and electronic measurement instrument (4) be connected with main control unit (3), data signal generator (5) and triaxial moving mechanism (6), wherein angle regulator (7) on main control unit (3) UNICOM control triaxial moving mechanism (6) and triaxial moving mechanism (6), angle regulator (7) are arranged in on angle regulator (7) and are close transducer (2) and set up, transducer (2) conversion data signal generator (5) produce the signal of telecommunication and be ultrasonic wave signal, electronic measurement instrument (4) gather the received sound wave of hydrophone (1), and transmit the sound wave of gathering and give main control unit (3).

7. The three-dimensional sound field measuring apparatus according to claim 6, characterized in that: the angle regulator (7) at least comprises a first regulator and a second regulator, wherein the first regulator is used for regulating the transverse angle of the hydrophone (1), the second regulator is used for regulating the longitudinal angle of the hydrophone (1), and the first regulator and the second regulator are connected with each other.

8. The three-dimensional sound field measuring apparatus according to claim 6, characterized in that: the three-axis movement mechanism (6) comprises a transverse movement mechanism (61) arranged on an X axis, a longitudinal movement mechanism (62) arranged on a Y axis and a vertical movement mechanism (63) arranged on a Z axis which are connected with each other.

9. The three-dimensional sound field measuring apparatus according to claim 6, characterized in that: the horizontal moving mechanism (61) is provided with a horizontal limiting stopper (611) for limiting the horizontal moving range of the hydrophone (1), the longitudinal moving mechanism (62) is provided with a longitudinal limiting stopper (621) for limiting the longitudinal moving range of the hydrophone (1), and the vertical moving mechanism (63) is provided with a vertical limiting stopper (631) for limiting the vertical moving range of the hydrophone (1).

10. The three-dimensional sound field measuring apparatus according to claim 6, characterized in that: hydrophone (1) and transducer (2) all are located the container, the container includes experiment water tank (9) and installs fixed water tank (10) in experiment water tank (9), install on fixed water tank (10) transducer (2), hydrophone (1) is located between experiment water tank (9) and fixed water tank (10).

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