CN218272730U - Automatic measuring system for three-dimensional directivity of wave beam - Google Patents
Automatic measuring system for three-dimensional directivity of wave beam Download PDFInfo
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- CN218272730U CN218272730U CN202222563524.4U CN202222563524U CN218272730U CN 218272730 U CN218272730 U CN 218272730U CN 202222563524 U CN202222563524 U CN 202222563524U CN 218272730 U CN218272730 U CN 218272730U
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Abstract
The utility model provides a three-dimensional directive property automatic measuring system of wave beam, include: the system comprises a master controller, a signal excitation source, a controllable gain amplifier, a data acquisition instrument, a spatial positioning controller, a first energy converter, a second energy converter, a first energy converter spatial four-dimensional movement mechanism and a second energy converter spatial four-dimensional movement mechanism; the first transducer is assembled through a first transducer space four-dimensional motion mechanism; the second transducer is assembled through a second transducer space four-dimensional motion mechanism; the output end of the master controller is connected with the first transducer through a signal excitation source; the output end of the second energy converter is connected with the master controller after sequentially passing through the controllable gain amplifier and the data acquisition instrument. The utility model discloses can the three-dimensional directive property of automatic measure sound wave or electromagnetic wave, and then can evaluate the beam radiation uniformity of different transducers, for sound wave or electromagnetic wave detection equipment's in the hole research and development provides the test support condition, establish the theoretical basis for improving the position resolution ability of the target body simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the geophysical, concretely relates to three-dimensional directive property automatic measurement system of wave beam.
Background
The beam directivity is a characteristic that the radiation response or the receiving response of sound waves or electromagnetic waves changes along with the azimuth angle, is a more important parameter in the research of the radiation characteristic of the sound waves or the electromagnetic waves, is used for knowing the beam directivity of the sound waves or the electromagnetic waves, and has good guiding significance for directional emission or directional reception in holes in the geophysical field.
Currently, for measuring the beam directivity, the petroleum university in china (beijing) establishes an indoor water tank measurement model, and a device such as a slide rail and a stepping motor is arranged above a water tank, so that the two-dimensional horizontal directivity of an acoustic wave transducer can be measured in a horizontal plane, but the beam directivity measurement model does not have the function of automatically measuring the three-dimensional directivity of a beam. For the beam directivity of electromagnetic waves, no complete automatic measuring device and method are available at present.
SUMMERY OF THE UTILITY MODEL
The defect to prior art exists, the utility model provides a three-dimensional directive property automatic measuring system of wave beam can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides a three-dimensional directive property automatic measuring system of wave beam, include: the system comprises a master controller, a signal excitation source, a controllable gain amplifier, a data acquisition instrument, a spatial positioning controller, a first energy converter, a second energy converter, a first energy converter spatial four-dimensional motion mechanism and a second energy converter spatial four-dimensional motion mechanism;
the first transducer is assembled through the first transducer space four-dimensional motion mechanism; the second transducer is assembled through the second transducer space four-dimensional motion mechanism; the output end of the master controller is connected with the first transducer through the signal excitation source; the output end of the second energy converter is connected with the master controller after passing through the controllable gain amplifier and the data acquisition instrument in sequence; the master controller is connected with the control end of the space positioning controller; the space positioning controller is respectively connected with the first transducer space four-dimensional motion mechanism and the second transducer space four-dimensional motion mechanism.
Preferably, the device further comprises an oscilloscope; and the output ends of the signal excitation source and the data acquisition instrument are connected to the input end of the oscilloscope.
Preferably, the data acquisition instrument is a multichannel synchronous high-precision data acquisition instrument.
Preferably, the device also comprises a silencing pool; and the first transducer and the second transducer are both positioned in the silencing pool.
Preferably, the first transducer space four-dimensional motion mechanism comprises: the first flat rail, the first vertical rail, a 1 st-1 st driving motor and a 1 st-2 nd driving motor;
in the xoy plane, a slide rail is arranged along the y direction in a left-right symmetrical mode; the first flat rail is arranged between the slide rails on the two sides, and the first flat rail moves along the slide rails in the y direction under the drive of the 1 st-1 st driving motor; the first vertical rail is assembled with the first flat rail, and the first vertical rail can move in the x direction and the z direction along the first flat rail and can freely rotate in the xoy plane under the driving of the 1 st-2 nd driving motor;
the second transducer spatial four-dimensional motion mechanism comprises: the second flat rail, the second vertical rail, the 2 nd-1 st driving motor and the 2 nd-2 nd driving motor;
the second flat rail is arranged between the slide rails on the two sides and moves along the slide rails in the y direction under the drive of the 2 nd-1 st drive motor; the second vertical rail is assembled with the second flat rail, and the second vertical rail can move in the x direction and the z direction along the second flat rail and can freely rotate in the xoy plane under the drive of the 2 nd-2 nd drive motor.
Preferably, the tail end of the first vertical rail is provided with the first transducer in a hanging mode; and the tail end of the second vertical rail is provided with the second transducer in a hanging mode.
Preferably, the first transducer is a transmitting transducer, and the second transducer is a receiving transducer; or, the first transducer is a receiving transducer, and the second transducer is a transmitting transducer.
The utility model provides a pair of three-dimensional directive property automatic measuring system of wave beam has following advantage:
the utility model provides a three-dimensional directive property automatic measuring system of wave beam can automatic measure sound wave or electromagnetic three-dimensional directive property, and then can evaluate the wave beam radiation uniformity of different transducers, for sound wave or electromagnetic wave detection equipment's in the hole research and development provides the test support condition, establishes the theoretical basis for improving the position resolution ability of the target body simultaneously.
Drawings
Fig. 1 is a schematic view of an overall structure of a beam three-dimensional directivity automatic measurement system provided by the present invention;
FIG. 2 is a schematic diagram of the initial 0 degree azimuth angle definition provided by the present invention
Fig. 3 is a top view of the beam three-dimensional directivity automatic measurement system provided by the present invention;
fig. 4 is a side view of the automatic beam three-dimensional directivity measuring system provided by the present invention;
wherein:
1 represents a left slide rail; 2 represents a right slide rail; 3-1 represents a first flat rail; 3-2 represents a first vertical rail; 3-3 represents the 1 st-1 st driving motor; 3-4 represents the 1 st-2 nd driving motor; 4-1 represents a second flat rail; 4-2 represents a second vertical rail; 4-3 represents a 2 nd-1 th driving motor; 4-4 represents a 2 nd-2 nd driving motor; 5 represents a first transducer; 6 represents a second transducer; and 7 represents a silencing pool.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings only for the convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus, are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The utility model provides a three-dimensional directive property automatic measuring system of wave beam can automatic measure sound wave or electromagnetic three-dimensional directive property, and then can evaluate the wave beam radiation uniformity of different transducers, for sound wave or electromagnetic wave detection equipment's in the hole research and development provides the test support condition, establishes the theoretical basis for improving the position resolution ability of the target body simultaneously.
Referring to fig. 1 and 3, be the overall view and the plan view of mechanical structure part of three-dimensional directive property automatic measuring system of wave beam respectively, the utility model provides a three-dimensional directive property automatic measuring system of wave beam includes: the system comprises a master controller, a signal excitation source, a controllable gain amplifier, a data acquisition instrument, a spatial positioning controller, a first energy converter, a second energy converter, a first energy converter spatial four-dimensional motion mechanism and a second energy converter spatial four-dimensional motion mechanism;
the first transducer is assembled through the first transducer space four-dimensional motion mechanism; the second transducer is assembled through the second transducer space four-dimensional motion mechanism; the output end of the master controller is connected with the first transducer through the signal excitation source; the output end of the second energy converter is connected with the master controller after passing through the controllable gain amplifier and the data acquisition instrument in sequence; the master controller is connected with the control end of the space positioning controller; the space positioning controller is respectively connected with the first transducer space four-dimensional motion mechanism and the second transducer space four-dimensional motion mechanism.
As a specific embodiment, the system further comprises an oscilloscope; and the output ends of the signal excitation source and the data acquisition instrument are connected to the input end of the oscilloscope.
As a specific embodiment, the data acquisition instrument is a multi-channel synchronous high-precision data acquisition instrument.
As a specific embodiment, the device also comprises a silencing pool; and the first transducer and the second transducer are both positioned in the silencing pool.
As a specific embodiment, the first transducer space four-dimensional motion mechanism comprises: the first flat rail, the first vertical rail, a 1 st-1 st driving motor and a 1 st-2 nd driving motor;
in the xoy plane, a slide rail is arranged along the y direction in a left-right symmetrical mode; the first flat rail is arranged between the slide rails on the two sides, and the first flat rail moves along the slide rails in the y direction under the drive of the 1 st-1 st driving motor; the first vertical rail is assembled with the first flat rail, and can move in the x direction and the z direction along the first flat rail and freely rotate in the xoy plane under the driving of the 1 st-2 nd driving motor;
the second transducer spatial four-dimensional motion mechanism comprises: the second flat rail, the second vertical rail, the 2 nd-1 st driving motor and the 2 nd-2 nd driving motor;
the second flat rail is arranged between the slide rails on the two sides and moves along the slide rails in the y direction under the drive of the 2 nd-1 st drive motor; the second vertical rail is assembled with the second flat rail, and the second vertical rail can move in the x direction and the z direction along the second flat rail and can freely rotate in the xoy plane under the drive of the 2 nd-2 nd drive motor.
Thus, the end of the first vertical rail is mounted with the first transducer in a suspended manner; and the tail end of the second vertical rail is provided with the second transducer in a hanging mode.
In the above description, the first transducer is a transmitting transducer and the second transducer is a receiving transducer; or, the first transducer is a receiving transducer, and the second transducer is a transmitting transducer.
One specific embodiment is described below:
the beam three-dimensional directivity automatic measurement system provided by the embodiment comprises a mechanical device and a control system.
As shown in FIG. 1, the control system comprises an upper computer, a router, a multi-channel synchronous high-precision data acquisition instrument, a space positioning controller, a controllable gain amplifier, a signal excitation source and an oscilloscope.
The upper computer is a master controller and is used for controlling a signal excitation source, a space positioning controller and a multi-channel synchronous high-precision data acquisition instrument.
And the signal excitation source is used for sending an excitation signal to the transmitting transducer under the control of the upper computer so that the transmitting transducer generates a radiation waveform in water. And the receiving transducer receives the waveform, transmits the waveform to the controllable gain amplifier, and is recorded and stored by the high-precision data acquisition instrument after signal gain.
The space positioning controller is used for controlling the motor to drive the first flat rail 3-1, the second flat rail 4-1, the first vertical rail 3-2 and the second vertical rail 4-2 to slide along the x, y and z axes, and can also control the free rotation of the transmitting/receiving transducers suspended on the first vertical rail 3-2 and the second vertical rail 4-2 in a horizontal plane (x-y plane) through the motor.
The oscilloscope is mainly used for dynamically monitoring the excitation signal and receiving the received waveform acquired by the transducer.
The router is used as a communication medium, and the upper computer is communicated with the multi-channel synchronous high-precision data acquisition instrument and the space positioning controller respectively through the router.
Therefore, the upper computer controls the signal excitation source to send an excitation signal to the transmitting transducer, and the transmitting transducer radiates a waveform to the surrounding space under the driving of the excitation signal. The upper computer controls the multichannel synchronous high-precision data acquisition instrument and the space positioning controller through the router, the multichannel synchronous high-precision data acquisition instrument acquires the waveform received by the receiving transducer under the control of the upper computer, and the received waveform is amplified in waveform amplitude through the controllable gain amplifier and is recorded and stored by the multichannel synchronous high-precision data acquisition instrument. And after the signal excitation source sends an excitation signal, the signal excitation source is connected to the oscilloscope through the data transmission line, so that the real-time monitoring of the sent signal is realized. The multichannel synchronous high-precision data acquisition instrument transmits the recorded received waveform to the oscilloscope, so that the real-time monitoring of the received waveform is realized.
The upper computer integrates the mechanical device control and the three-dimensional coordinate calculation of the transducer, and inputs the horizontal rotation direction (clockwise)&Counterclockwise) and horizontal rotation angle interval phi,Vertical direction of rotation (upwards)&Down) and vertical motion angle interval theta, the center three-dimensional coordinate (x) of the transmitting transducer 0 ,y 0 ,z 0 ) The distance r between the centers of the transmitting transducer and the receiving transducer can realize the space positioning and movement of the mechanical device through the space positioning controller.
As shown in fig. 1, the mechanical device includes a sound-deadening tank filled with water during beam directivity measurement, which is used to simulate a downhole sound wave or electromagnetic wave measurement environment, and simultaneously absorbs reflected waves from the side wall and the bottom, thereby minimizing interference of multi-directional reflected waves. Therefore, the silencing pool is used for providing a place for measuring the three-dimensional directivity of the wave beam and simulating the water environment in the drilling hole.
A left side slide rail 1 and a right side slide rail 2 are arranged on two sides of the silencing pool in the x direction, a first flat rail 3-1 and a second flat rail 4-1 are arranged between the left side slide rail 1 and the right side slide rail 2, and free movement along the y direction is achieved under the driving of respective motors. The first flat rail 3-1 is provided with a first vertical rail 3-2, the second flat rail 4-1 is provided with a second vertical rail 4-2, the first vertical rail 3-2 and the second vertical rail 4-2 realize free movement along the x direction and the z direction under the drive of respective motors, and clockwise and anticlockwise horizontal rotation in the horizontal plane can be realized. The transmitting/receiving transducer can be respectively arranged under the first vertical rail 3-2 and the second vertical rail 4-2 in a hanging way. Thus, in combination with the control system, four-dimensional motion of the transmitting/receiving transducer in space can be achieved, i.e., free motion in the x, y, z directions and free rotation in the horizontal direction.
The left side slide rail 1, the right side slide rail 2, the first flat rail 3-1, the second flat rail 4-1, the first vertical rail 3-2 and the second vertical rail 4-2 form a mechanical device of the three-dimensional positioning system. The first flat rail 3-1 and the second flat rail 4-1 can slide freely along the y axis on sliding rails on two sides, the first vertical rail 3-2 and the second vertical rail 4-2 can slide along the x axis and the z axis on the first flat rail 3-1 and the second flat rail 4-1 respectively, the transmitting transducer and the receiving transducer are suspended right below the first flat rail 3-1 and the second flat rail 4-1, and the free movement of the transducers in a three-dimensional space can be realized through the sliding of the flat rails and the vertical rails in the x axis, the y axis and the z axis.
Before beam directivity measurement, the two transducers are positioned to the yoz plane through spatial four-dimensional motion, the same height is kept, the walking path of a radiation waveform reflected to the receiving transducer through the side wall, the bottom surface or the water surface is far larger than the distance r between the two transducers through calculation, and the direct wave and the reflected wave are ensured to be obviously separated in a time domain.
The utility model also provides a method of three-dimensional directive property automatic measurement system of wave beam, including following step:
step 3, determining an initial position:
the master controller controls the first transducer space four-dimensional movement mechanism and the second transducer space four-dimensional movement mechanism through the space positioning controller, so that the positions of the first transducer and the second transducer in the space are controlled, and the first transducer and the second transducer reach initial positions;
wherein, the initial position of the first transducer and the second transducer refers to: the first transducer and the second transducer are both located in the yoz plane and are equal in height; the center three-dimensional coordinate of the first transducer is (x) 0 ,y 0 ,z 0 ) The distance between the first transducer and the second transducer is r; in the yoz plane, the second transducer is located at the 0 ° azimuth of the first transducer, i.e.: the position is at the initial 0-degree azimuth angle in the vertical direction;
and 4, when the second transducer is positioned at the initial azimuth angle of 0 degrees in the vertical direction, the first transducer measures the horizontal radiation directivity in the xoy horizontal plane:
the master controller controls the signal excitation source to send an excitation signal to the first energy converter, and the first energy converter continuously radiates waveforms to the periphery;
in the process that the first transducer continuously radiates waveforms to the periphery, the position of the second transducer is kept fixed, the first transducer is enabled to horizontally rotate around a vertical axis of the first transducer from an initial horizontal 0-degree azimuth position, the interval of horizontal rotation angles is phi, when the first transducer rotates to a horizontal azimuth position, the second transducer receives the waveforms and is recorded and stored by the data acquisition instrument, and the stored data is as follows: a horizontal azimuth of the first transducer and a received waveform at the horizontal azimuth;
therefore, when the first transducer rotates horizontally for one 360 degrees, a plurality of horizontal azimuth angles and receiving waveforms at the horizontal azimuth angles are obtained; analyzing and processing the received waveform under each horizontal azimuth angle to obtain the maximum peak-to-peak value of the head wave of the received waveform; carrying out normalization processing on the maximum peak value under each horizontal azimuth angle to obtain a horizontal radiation value; under the polar coordinate, drawing horizontal radiation values under each horizontal azimuth angle to obtain a horizontal radiation directivity curve of the first transducer;
therefore, when the second transducer vertically rotates for a circle 360 degrees, the horizontal radiation directivity curve of the first transducer corresponding to each vertical azimuth angle is obtained, and three-dimensional directivity measurement of the first transducer is realized.
The following describes a specific embodiment of the beam three-dimensional directivity automatic measurement system and method:
as shown in FIG. 1, the present invention is provided with a flat rail and a vertical rail, a first flat rail 3-1 and a first vertical rail 3-2 are connected together and combined with a motor to realize the free space motion of a transmitting transducer and the rotation in the horizontal plane, a second flat rail 4-1 and a second vertical rail 4-2 are connected together and combined with a motor to realize the free space motion of a receiving transducer and the rotation in the horizontal plane, of course, the transmitting transducer can be suspended below the second vertical rail 4-2, and the receiving transducer can be suspended below the first vertical rail 3-2.
The three-dimensional rectangular coordinates of the transmitting transducer and the receiving transducer are calculated by self-programming through self-definition of the three-dimensional rectangular coordinates and sliding distances of the flat rail and the vertical rail, and fixed-angle rotation of the transmitting transducer or the receiving transducer in an x-y plane is realized through a stepping motor integrated in the vertical rail. Therefore, the horizontal directivity of the transmitting transducer can be measured by rotating the transmitting transducer once and immobilizing the receiving transducer. The receiving transducer can also move on a circle which takes the center of the transmitting transducer as a center and takes the distance r between the centers of the two transducers as a radius according to a set vertical movement angle interval theta in a y-z plane, the initial three-dimensional coordinates of the transmitting transducer and the receiving transducer are known, the radius r and the angle theta are known, variable values dy and dz of each movement of the receiving transducer in the y-z plane can be calculated through self-programming by combining a plane trigonometric function, the three-dimensional coordinates of the receiving transducer after each movement are further calculated, and the position of the transmitting transducer is fixed, so that the vertical directivity of the transmitting transducer can be measured. Through the combination of the horizontal measurement and the vertical measurement, the three-dimensional directivity measurement of the transmitting transducer can be realized.
The following describes the specific measurement principle:
in this embodiment, the first transducer is taken as a transmitting transducer, the second transducer is taken as a receiving transducer, and the first transducer is used for measuring the radiation directivity of the transmitting transducer:
(1) Spatial positioning of transducers
Assuming that the point O in FIG. 1 is taken as the origin of coordinates, a three-dimensional rectangular coordinate system as shown in FIG. 1 is established, and the central three-dimensional coordinate of the transmitting transducer is defined as (x) 0 ,y 0 ,z 0 ) The distance between the two transducers is r, the parameters are input by upper computer control software, and the central space three-dimensional coordinates of the receiving transducers are automatically calculated into (x) by the upper computer 1 ,y 1 ,z 1 )＝(x 0 ,r+y 0 ,z 0 ). After the coordinates and the distance r are obtained, the upper computer sends parameters to the space positioning controller through the router, so that the space positioning of the two transducers can be realized, and meanwhile, the space positioning of the two transducers is ensuredThe initial position of the transducer is at the same height in the yoz plane. In the transducer space positioning link, attention should be paid to the fact that the two transducers are always kept in the yoz plane, and the motion of the transducers in the vertical direction and the calculation of space coordinates are facilitated.
(2) Define 0 deg. azimuth
As shown in fig. 2 to 4, when the axial planes of the transmitting transducer and the receiving transducer are both parallel to the xoz plane and are located at the same height, the horizontal and vertical initial azimuth angles of the transmitting transducer and the receiving transducer are defined to be 0 °. Then the transmitting transducer can rotate clockwise or anticlockwise along the self axis, and the horizontal rotation angle interval is defined as phi; the receiving transducer can perform circular motion in a yoz plane along the radius of the distance r with the center of the transmitting transducer as the center, the motion direction can be divided into an upward direction and a downward direction, and the vertical rotation angle interval is defined as theta. The horizontal and vertical rotation directions, the horizontal rotation angle interval Φ, and the vertical rotation angle interval θ are inputted in the upper computer control software.
(3) Three-dimensional directivity automatic measuring method
The utility model discloses use the radiation directive property of measuring transmitting transducer as the example in the row, explain three-dimensional directive property automatic measure method and flow.
After the transducer is positioned and the initial azimuth angle of 0 degree is recovered through the space, the beam directivity measurement of the transmitting transducer can be started according to the rotating direction and the rotating angle interval phi given by the upper computer.
Assuming that the receiving transducer is fixed, the transmitting transducer starts to rotate horizontally anticlockwise around a vertical shaft of the transmitting transducer from an initial azimuth angle of 0 degree at an angle interval of phi, an excitation signal is sent to the transmitting transducer through an upper computer control signal excitation source before the transmitting transducer starts to rotate, waveforms begin to radiate around, a data acquisition instrument and a controllable gain amplifier are started simultaneously, and the upper computer controls the data acquisition instrument to start to acquire and receive the waveforms through a router. And after the data acquisition instrument stores the received waveform, feeding back the waveform to an upper computer, sending a command to the space positioning controller by the upper computer through a router, rotating the transmitting transducer to a next angle, namely 0+ n phi (n =1,2, 3.,. 360/phi), repeating the process, recording the received waveform and storing data. Therefore, every time the transmitting transducer rotates by an angle, the receiving transducer receives the waveform and is recorded and stored by the data acquisition instrument, and the stored data comprises the angle parameter and the corresponding receiving waveform. Repeating the above steps, after the transmitting transducer rotates for one circle, obtaining each azimuth angle parameter and the received waveform at the azimuth angle respectively, by reading the maximum peak value (difference value between the highest peak and the lowest valley amplitude) of the received waveform head wave at each azimuth angle, dividing by the maximum peak value (normalization processing) of the received waveform head wave at the initial 0-degree azimuth angle, and by adopting the ratio of the azimuth angle parameter and the corresponding normalization processing at the polar coordinate, drawing a horizontal radiation directivity curve in the 360-degree direction in the horizontal plane, so that the horizontal radiation directivity measurement in the 360-degree direction in the horizontal plane (the horizontal plane at the initial 0-degree azimuth angle in the vertical direction) is completed, and the horizontal radiation directivity of the transmitting transducer in the xoy plane is obtained by the acquisition, as shown in fig. 3. When the receiving directivity of the receiving transducer is measured, the spherical standard transmitting transducer is selected to be fixed, and the receiving transducer rotates for a circle as described above, so that the horizontal receiving directivity measurement in the 360-degree direction in a horizontal plane (the horizontal plane at the initial 0-degree azimuth angle in the vertical direction) is realized.
The horizontal radiation directivity in the xoy plane at the vertical initial azimuth angle of 0 degree is obtained, and in order to obtain the three-dimensional directivity of the transmitting transducer, the position of the receiving transducer needs to be changed, that is: the position of the receiving transducer is moved in the yoz plane along a circle which takes the center of the transmitting transducer as the center of a circle and the distance r between the transducers as the radius, and the moving direction and the vertical moving angle interval theta of each time can be input in the software of the upper computer. Assuming that the receiving transducer moves upwards, the moving distances dy and dz of the receiving transducer are automatically solved through upper computer software, and dy = y is obtained through trigonometric function calculation 0 -r*cos(n*θ)，dz＝z 0 + r sin (n θ), where n =1,2,3,.., 90/θ, the spatial coordinates of the receiving transducer are automatically resolved to (x) 1 ,y 1 ,z 1 )＝(x 0 ,dy+r+y 0 ,dz+z 0 )。
Then, parameters are sent to a space positioning controller through an upper computer, so that the displacement of the receiving transducer in the yoz plane is realizedThe receiving transducer is moved to the next position 1 x θ. Then, the horizontal radiation directivity measurement process is repeated, namely: the transmitting transducer begins one revolution from its own, and the horizontal radiation directivity of the transmitting transducer in the xoy plane is measured at a vertical azimuth angle of n x θ (n =1,2, 3.., 90/θ), and the data processing procedure is as described above. By circulating in this way, the horizontal radiation directivity of the transmitting transducer at each vertical azimuth angle n x theta (n =0,1, 2.. 90/theta) can be realized, namely, the hemispherical three-dimensional radiation directivity of the transmitting transducer in the first quadrant and the second quadrant of the space is realized. If the receiving transducer is moved downwards from the initial position, dy = y 0 -r*cos(n*θ)，dz＝z 0 -r sin (n θ), where n =1,2,3, 90/θ, the spatial coordinates of the receiving transducer are automatically resolved to (x) 1 ,y 1 ,z 1 )＝(x 0 ,dy+r+y 0 ,dz+z 0 ). Then, the measurement process is the same as above, and the hemispherical three-dimensional radiation directivity of the transmitting transducer in the third and fourth quadrants can be measured, as shown in fig. 4.
In summary, by setting the horizontal rotation angle interval Φ and the vertical movement angle interval θ, the three-dimensional spherical radiation directivity of the transmitting transducer can be realized.
The utility model discloses in, the three-dimensional globular reception directivity measurement process of receiving the transducer is with the radiation directivity measurement of transmitting the transducer, only needs to make transmitting the transducer motionless at every vertical angle position, and receiving transducer autogyration a week, later transmitting the transducer and removing to next vertical angle n theta (n =1,2, 3. Such a cycle can measure the three-dimensional receive directivity of the receive transducer.
It should be noted that: (1) When measuring the three-dimensional radiation directivity of a transmitting transducer, it is necessary to use an omni-directional standard receiving transducer and vice versa. (2) Since the first flat rail 3-1 and the second flat rail 4-1 are in contact, the receiving transducer cannot be realized right above and right below the transmitting transducer. The safety problem of the device is fully considered in the design, an alarm will be automatically sent out after the distance between the first flat rail 3-1 and the second flat rail 4-1 is less than 5mm, the space positioning device will automatically stop moving, and the measurement work can be stopped at the moment.
The utility model provides a three-dimensional directive property automatic measurement system of wave beam and method has following characteristics and advantage:
(1) The utility model discloses utilize transducer spatial position coordinate automatic solution technique, only need know the three-dimensional coordinate (x) of a transducer initial position 0 ,y 0 ,z 0 ) The distance r between the two transducers and the vertical movement angle interval theta can automatically calculate the dy and the dz of the other transducer moving in space each time, and further calculate the three-dimensional coordinate of the target position point moving each time, so that theoretical support is provided for the intelligent movement and accurate positioning of the transducers in space.
(2) The utility model discloses utilize slide rail, flat rail and erect the mechanical device of rail, combine control system, realized the intelligent four-dimensional motion of transducer in the space, provide the condition for realizing the three-dimensional directive property automatic measure of wave beam. The mechanical device is provided with a pre-collision (interval <5 mm) alarm function, so that the safety of the mechanical device can be guaranteed.
(3) The utility model provides a three-dimensional beam directive property measurement method, under the combination of two degrees of freedom are removed to transducer horizontal rotation and perpendicular circular arc, only need remove half circular arc in the yoz plane, just can realize the measurement of globular three-dimensional directive property.
(4) The utility model discloses well whole system mechanical device, control system, measuring method combine organically, and the shortcoming is one by one. The whole system can be used for automatic measurement of the three-dimensional directivity of the wave beam of the acoustic wave and electromagnetic wave sensor, comprises the transmitting directivity and the receiving directivity, and provides better support for research of wave field propagation theory, research of directional transmitting and receiving technology in the hole, acoustic wave logging in the hole and research of electromagnetic wave logging equipment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (7)
1. An automatic measurement system for three-dimensional directivity of a beam, comprising: the system comprises a master controller, a signal excitation source, a controllable gain amplifier, a data acquisition instrument, a spatial positioning controller, a first energy converter, a second energy converter, a first energy converter spatial four-dimensional motion mechanism and a second energy converter spatial four-dimensional motion mechanism;
the first transducer is assembled through the first transducer space four-dimensional motion mechanism; the second transducer is assembled through the second transducer space four-dimensional motion mechanism; the output end of the master controller is connected with the first transducer through the signal excitation source; the output end of the second energy converter is connected with the master controller after passing through the controllable gain amplifier and the data acquisition instrument in sequence; the master controller is connected with the control end of the space positioning controller; the space positioning controller is respectively connected with the first transducer space four-dimensional motion mechanism and the second transducer space four-dimensional motion mechanism.
2. The automatic beam three-dimensional directivity measuring system according to claim 1, further comprising an oscilloscope; and the output ends of the signal excitation source and the data acquisition instrument are connected to the input end of the oscilloscope.
3. The beam three-dimensional directivity automatic measurement system according to claim 1, wherein the data collector is a multi-channel synchronous high-precision data collector.
4. The automatic beam three-dimensional directivity measuring system according to claim 1, further comprising a silencing tank; and the first transducer and the second transducer are both positioned in the silencing pool.
5. The automatic beam three-dimensional directivity measuring system according to claim 1, wherein the first transducer space four-dimensional movement mechanism comprises: the first flat rail, the first vertical rail, a 1 st-1 st driving motor and a 1 st-2 nd driving motor;
in the xoy plane, a slide rail is arranged along the y direction in a left-right symmetrical mode; the first flat rail is arranged between the sliding rails on the two sides, and the first flat rail is driven by the 1 st-1 st driving motor to move along the sliding rails in the y direction; the first vertical rail is assembled with the first flat rail, and can move in the x direction and the z direction along the first flat rail and freely rotate in the xoy plane under the driving of the 1 st-2 nd driving motor;
the second transducer spatial four-dimensional motion mechanism comprises: the second flat rail, the second vertical rail, the 2 nd-1 st driving motor and the 2 nd-2 nd driving motor;
the second flat rail is arranged between the slide rails on the two sides and moves along the slide rails in the y direction under the drive of the 2 nd-1 st drive motor; the second vertical rail is assembled with the second flat rail, and the second vertical rail can move in the x direction and the z direction along the second flat rail and can freely rotate in the xoy plane under the drive of the 2 nd-2 nd drive motor.
6. The automatic beam three-dimensional directivity measuring system according to claim 5, wherein the first transducer is suspended and mounted at the end of the first vertical rail; and the tail end of the second vertical rail is provided with the second transducer in a hanging way.
7. The automatic beam three-dimensional directivity measurement system according to claim 1, wherein the first transducer is a transmitting transducer and the second transducer is a receiving transducer; or, the first transducer is a receiving transducer, and the second transducer is a transmitting transducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222563524.4U CN218272730U (en) | 2022-09-27 | 2022-09-27 | Automatic measuring system for three-dimensional directivity of wave beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222563524.4U CN218272730U (en) | 2022-09-27 | 2022-09-27 | Automatic measuring system for three-dimensional directivity of wave beam |
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| CN218272730U true CN218272730U (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222563524.4U Active CN218272730U (en) | 2022-09-27 | 2022-09-27 | Automatic measuring system for three-dimensional directivity of wave beam |
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| Country | Link |
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| CN (1) | CN218272730U (en) |
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