阅读说明：本技术 一种科教水声演示平台 (Science and education underwater sound demonstration platform ) 是由 徐晓辉 张宇 傅伟杰 杨晨 肖朕 于 2021-08-20 设计创作，主要内容包括：本发明适用于水声工程技术领域,提供了一种科教水声演示平台,包括：水池本体、分别设置在所述水池本体的相对两侧壁上的两组第一移动机构、设置在两组所述第一移动机构之间的两组第二移动机构、设置在其中一组所述第二移动机构上的目标物衔接件、设置在另一组所述第二移动机构上的换能器、控制机构以及显示单元。本发明通过控制机构控制设置在水池本体上的两组第一移动机构以及在两组第一移动机构上设置两组第二移动机构,从而改变换能器与目标物的相对位置,且控制换能器工作；并将解析后的反射电信号显示在显示器中,该设备结构简单,所需成本低；提高了学生的实操机会,且便于操作演示。(The invention is suitable for the technical field of underwater acoustic engineering, and provides a science and education underwater acoustic demonstration platform, which comprises: the pool comprises a pool body, two groups of first moving mechanisms which are respectively arranged on two opposite side walls of the pool body, two groups of second moving mechanisms which are arranged between the two groups of first moving mechanisms, a target object connecting piece which is arranged on one group of the second moving mechanisms, and an energy converter, a control mechanism and a display unit which are arranged on the other group of the second moving mechanisms. The invention controls two groups of first moving mechanisms arranged on the pool body and two groups of second moving mechanisms arranged on the two groups of first moving mechanisms through the control mechanism, thereby changing the relative position of the energy converter and the target object and controlling the energy converter to work; the analyzed reflected electric signal is displayed in a display, and the equipment has a simple structure and low required cost; the practical exercise opportunity of students is improved, and the operation demonstration is convenient.)

1. A science education underwater sound demonstration platform is characterized by comprising:

a pool body (10);

two groups of first moving mechanisms (20) are arranged on two opposite side walls of the water pool body (10) respectively;

two sets of second moving mechanisms (30) which are arranged between the two sets of first moving mechanisms (20);

a target engaging member (40) provided on one of the sets of second moving mechanisms (30) for engaging the target;

a transducer (50) arranged on the other set of said second moving mechanisms (30) for conversion of electrical signals and acoustic signals;

a control mechanism (60) for controlling the first moving mechanism and the second moving mechanism to move; and is used for controlling the transducer (50) to work so as to convert the electric signal into an acoustic signal to be emitted; and controlling the transducer (50) to receive reflected acoustic signals of the target object or other underwater acoustic signals and convert them into reflected electrical signals by the transducer (50); and the control mechanism (60) is further configured to interpret the reflected electrical signal;

and the display unit is used for displaying the analyzed reflected electric signal on a display, wherein the analyzed reflected electric signal comprises a waveform, a frequency spectrum and a distance.

2. The science education underwater sound demonstration platform according to claim 1, characterized in that the control mechanism (60) is further used for controlling the first moving mechanism (20) and/or the second moving mechanism (30) to move according to a predetermined route at different or same speed.

3. The scientific underwater sound demonstration platform according to claim 1, wherein the target is various bionic fishes, and the control mechanism (60) is further used for controlling the first moving mechanism (20) and/or the second moving mechanism (30) provided with the target joint (40) to move at the limit speed of different kinds of fishes according to a preset route.

4. The scientific underwater sound demonstration platform according to claim 1, wherein the objects are various kinds of water or underwater vessels, and the control mechanism (60) is further used for controlling the first moving mechanism (20) and/or the second moving mechanism (30) provided with the object joints (40) to move at the limit speed of different kinds of water or underwater vessels according to a predetermined route.

5. The science education underwater sound demonstration platform according to claim 1, characterized in that the first moving mechanism (20) and the second moving mechanism (30) are provided with scale values.

6. The science education underwater sound demonstration platform according to claim 1 further comprising a cabinet (80), the control mechanism (60) being disposed in the cabinet (80), the control mechanism (60) including a computer and a signal transmission mechanism (70), the signal transmission mechanism (70) including:

the data acquisition card (71) is arranged in the case (80) and is used for realizing the mutual conversion of the digital signals and the electric signals of the computer;

a power amplification module (72) for boosting the energy of the electrical signal output by the data acquisition card (71) and loading the energy to the transducer (50) through a transceiving conversion module (73); the receiving and transmitting conversion module (73) is used for controlling the conversion of a transmitting end circuit and a receiving end circuit; and

and the filtering and amplifying module (74) is used for carrying out front-end amplification and filtering processing on the analog electric signal received by the transceiving conversion module (73) in a receiving end and transmitting the analog electric signal to the data acquisition card (71).

7. The scientific underwater sound demonstration platform according to claim 1, wherein the transducer (50) is a piston transceiver transducer.

8. The science education underwater sound demonstration platform according to claim 1, characterized in that the pool body (10) comprises a support frame (11) and a reservoir (12) arranged in the support frame (11), and a plurality of rollers (13) are arranged at the bottom of the support frame (11).

9. The scientific and educational underwater sound demonstration platform according to claim 8, wherein the water reservoir (12) is made of a transparent material.

10. The scientific and educational underwater sound demonstration platform according to claim 8, wherein the water reservoir (12) is provided with an acoustic wedge (90) inside.

Technical Field

The invention belongs to the technical field of underwater acoustic engineering, and particularly relates to a science and education underwater acoustic demonstration platform.

Background

Sound waves are an effective energy means for underwater long distance transmission. The underwater acoustic technology refers to a technical means for performing underwater detection, positioning, navigation, communication and other applications by using an underwater acoustic technology. With the continuous expansion and deepening of ocean development process and the continuous progress of related electronic technology, the application scenes and practitioners of underwater acoustic technology are also rapidly increasing. Therefore, a great amount of underwater science and education demands are generated in the fields of scientific research of talent culture, colleges and scientific research institutions, professional technical training in the field of military industry or ships, ocean science popularization and the like. The characteristics of the complexity, the abstraction and the systematicness of the underwater sound related technology require that the scientific teaching process is intuitive, practical and decomposable. Therefore, a science and education demonstration platform for underwater acoustic technical principle display and practice training has important economic and educational values.

At present, the domestic underwater acoustic science and education demonstration or experiment platform mainly has two types. One is a large measuring or scientific pool. The water pool facility is large in size and excellent in experimental conditions. But are expensive to purchase and maintain; and the equipment management, operation and maintenance are complex. The other type is a small-sized water pool for testing and measuring the performance of the transducer, such as an ocean depth measuring sonar detection platform (CN 202886701U), an underwater sound source system for experimental teaching (CN106747435A), and a low-frequency sound-deadening water pool suitable for limited space (CN 109994096A). The pool is mainly used for the performance test of a sonar system or a component, and related user interaction is not suitable for science education or science popularization demonstration; and the system is mainly assembled by a plurality of devices, and has single function and difficult expansion.

The above current situation causes limitations in science popularization, teaching, technical training and scientific research work related to the existing underwater acoustic technology: if the actual operation chance is few; the demonstration system is not vivid and visual enough; the ideas of teaching and scientific research cannot be effectively implemented due to the reasons of expenses and places.

Disclosure of Invention

The invention provides a science and education underwater sound demonstration platform which can effectively solve the problems.

The invention is realized by the following steps:

a science education underwater sound demonstration platform comprising:

a pool body;

two groups of first moving mechanisms are arranged on two opposite side walls of the water pool body respectively;

two groups of second moving mechanisms which are arranged between the two groups of first moving mechanisms;

a target engaging member provided on one of the second moving mechanisms for engaging the target;

the transducer is arranged on the other group of the second moving mechanisms and is used for converting electric signals and acoustic signals;

the control mechanism is used for controlling the first moving mechanism and the second moving mechanism to move; the transducer is used for controlling the transducer to work so as to convert the electric signal into an acoustic signal to be sent out; the transducer is controlled to receive the reflected sound signal of the target object or other underwater sound signals, and the reflected sound signal or other underwater sound signals are converted into reflected electric signals by the transducer; and the control mechanism is further used for analyzing the reflected electric signal;

and the display unit is used for displaying the analyzed reflected electric signal on a display, wherein the analyzed reflected electric signal comprises a waveform, a frequency spectrum and a distance.

As a further improvement, the control mechanism is further used for controlling the first moving mechanism and/or the second moving mechanism to move at different or same speeds according to a preset route.

As a further improvement, the target object is various kinds of bionic fishes, and the control mechanism is further used for controlling the first moving mechanism and the second moving mechanism provided with the target object joint part to move at the limit speed of different kinds of fishes according to a preset route.

As a further refinement, the object is a variety of above-water or underwater vessels, and the control means is further adapted to control the first movement means and/or the second movement means provided with the object link to move at the limit speed of different kinds of above-water or underwater vessels according to a predetermined route.

As a further improvement, the first moving mechanism and the second moving mechanism are both provided with scale values.

As a further improvement, the science education underwater sound demonstration platform further comprises a case, the control mechanism is arranged in the case and comprises a computer and a signal transmission mechanism, and the signal transmission mechanism comprises:

the data acquisition card is arranged in the case and used for realizing the mutual conversion of the digital signal and the electric signal of the computer;

the power amplification module is used for improving the energy of the electric signal output by the data acquisition card and loading the electric signal to the transducer through the transceiving conversion module; the receiving and transmitting conversion module is used for controlling the conversion of the transmitting end and the receiving end circuit; and

and the filtering and amplifying module is used for carrying out front-end amplification and filtering processing on the analog electric signal received by the transceiving conversion module in a receiving end and transmitting the analog electric signal to the data acquisition card.

As a further improvement, the transducer is a piston type transceive transducer.

As a further improvement, the water pool body comprises a supporting frame and a water storage pool arranged in the supporting frame, and a plurality of rollers are arranged at the bottom of the supporting frame.

As a further improvement, the water reservoir is made of transparent material.

As a further improvement, the inner side of the water reservoir is provided with a sound absorption wedge.

The invention has the beneficial effects that: the invention controls two groups of first moving mechanisms arranged on the pool body and two groups of second moving mechanisms arranged on the two groups of first moving mechanisms through the control mechanism, thereby changing the relative position of the energy converter and the target object and controlling the energy converter to work; the analyzed reflected electric signal is displayed in a display, and the equipment has a simple structure and low required cost; the practical exercise opportunity of students is improved, and the operation demonstration is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a scientific education underwater sound demonstration platform provided by an embodiment of the invention;

FIG. 2 is a schematic diagram of an active sonar principle of a scientific and educational underwater sound demonstration platform according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a passive sonar principle of a scientific education underwater sound demonstration platform provided by an embodiment of the present invention.

Reference numerals:

10-a pool body; 20-a first movement mechanism; 30-a second moving mechanism; 40-target link; 41-target; 50-a transducer; 60-a control mechanism; 70-a signal delivery mechanism; 80-a case; 71-a data acquisition card; 72-a power amplification module; 73-a transceiving conversion module; 74-a filtering and amplifying module; 11-a support frame; 12-a water reservoir; 13-a roller; 90-wedge; 100-water surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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 invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-3, a science education underwater sound demonstration platform comprises:

a pool body 10;

two groups of first moving mechanisms 20 are respectively arranged on two opposite side walls of the water pool body 10;

two sets of second moving mechanisms 30 each provided between the two sets of first moving mechanisms 20;

a target engaging member 40 provided on one of the sets of the second moving mechanisms 30 for engaging a target 41;

a transducer 50, provided on the other set of the second moving mechanisms 30, for conversion of electrical signals and acoustic signals;

a control mechanism 60 for controlling the first moving mechanism and the second moving mechanism to move; and is used for controlling the operation of the transducer 50 to convert the electric signal into the acoustic signal to be emitted; and controlling the transducer 50 to receive the reflected acoustic signal or other underwater acoustic signal of the target object, and converting the reflected acoustic signal or other underwater acoustic signal of the target object into a reflected electrical signal by the transducer 50; and the control mechanism 60 is further configured to interpret the reflected electrical signal;

and the display unit is used for displaying the analyzed reflected electric signal on a display, wherein the analyzed reflected electric signal comprises a waveform, a frequency spectrum and a distance.

In specific implementation, as shown in fig. 1 to 3, different parameters are set according to requirements, where the parameters include a working mode, a signal sending parameter setting, a signal receiving parameter setting, a measurement data storage, and the like; the body 10 is filled with water and the surface 100 of the water is submerged in the wedges 90 as shown. When the system is in the active sonar operating mode, the control mechanism 60 sends an electrical signal through the signal transmission mechanism 70 according to the set information of the parameters sent by the signal, and the electrical signal is loaded into the transducer 50 and drives the transducer 50 to radiate sound waves into the water. The underwater sound wave interacts with a target 41 on the target connecting piece 40 in the process of propagation to generate backscattering wave carrying target information; and then received by the transducer 50; the transducer 50 converts the acoustic signal into an electrical signal and transmits the electrical signal back to the control mechanism 60 through the signal transmission mechanism 70, and the control mechanism 60 stores the data and displays the analyzed reflected electrical signal on the display of the display unit, wherein the analyzed reflected electrical signal includes a waveform, a frequency spectrum and a distance. When the system is in passive sonar mode of operation, the underwater sound source receives and converts the acoustic signals into electrical signals by the transducer 50 during propagation. And then transmitted to the control mechanism 60 through the signal transmission mechanism 70, and the control mechanism 60 stores the data and displays the analyzed reflected electric signal on the display of the display unit. The object connecting piece 40 moves in all directions of the horizontal plane of the object 41 in the pool body 10 under the driving of the first moving mechanism 20 and the second moving mechanism 30; the transducer 50 moves in all directions of the horizontal plane of the transducer 50 in the pool body 10 under the driving of the first moving mechanism 20 and the second moving mechanism 30.

The control mechanism 60 controls the two first moving mechanisms 20 to work, so that the distance between the transducer 50 and the target 41 in the moving direction of the first moving mechanism 20 can be changed. The control mechanism 60 controls the two second moving mechanisms 30 to work, so that the distance between the transducer 50 and the target 41 in the moving direction of the second moving mechanism 30 can be changed. In this embodiment, a third moving mechanism may be further disposed on each of the two sets of second moving mechanisms 30, the third moving mechanism is perpendicular to the plane where the first moving mechanism 20 and the second moving mechanism 30 are located, the transducer 50 and the target are disposed on each of the two sets of third moving mechanisms, and the control mechanism 60 controls the two third moving mechanisms to operate, so that the distance between the transducer 50 and the target in the moving direction of the third moving mechanisms can be changed. In addition, the distance change between the transducer 50 and the target object can also be changed by manual adjustment; the change condition of the sound wave reflection signal can be simulated and detected when different targets are detected by replacing the target object.

The invention controls two groups of first moving mechanisms arranged on the pool body and two groups of second moving mechanisms arranged on the two groups of first moving mechanisms through the control mechanism, thereby changing the relative position of the energy converter and the target object and controlling the energy converter to work; the analyzed reflected electric signal is displayed in a display, the equipment has a simple structure, and the required operation and maintenance cost is low; the practical exercise opportunity of students is improved, and the operation demonstration is convenient.

Further, the control mechanism 60 is further used for controlling the first moving mechanism 20 and/or the second moving mechanism 30 to move at different or the same speed according to a predetermined route. In this embodiment, the control mechanism controls the first moving mechanism 20 and/or the second moving mechanism 30, and further controls the relative position of the transducer 50 and the target object, so that a plurality of different types of target objects can be more vividly and intuitively demonstrated, and the accuracy of data is improved.

Further, the target object is various kinds of bionic fish, and the control mechanism 60 is further configured to control the first moving mechanism 20 and/or the second moving mechanism 30 provided with the target object linking member 40 to move at the limit speed of different kinds of fish according to a predetermined route. In the embodiment, the control mechanism 60 sets the traveling parameters of the first moving mechanism 20 and the second moving mechanism 30 according to the traveling modes of different types of fishes, so that the different types of fishes are controlled to travel along the preset route formed by the traveling parameters at the limit speed, the reality of the traveling of the simulated fishes is improved, and the demonstration is more intuitive.

Further, the object is various kinds of above-water or underwater vessels, and the control means 60 is further configured to control the first moving mechanism 20 and/or the second moving mechanism 30 provided with the object link 40 to move at the limit speed of different kinds of above-water or underwater vessels according to a predetermined route. In the embodiment, according to the traveling modes of various waterborne or underwater ships, the control mechanism 60 is used for setting the traveling parameters of the first moving mechanism 20 and the second moving mechanism 30, so that different waterborne or underwater ships are controlled to travel along a preset route formed by the traveling parameters at a limit speed, the traveling reality of the simulated ships is improved, and the demonstration is more intuitive.

In addition, the target object can also be an object in a static state, such as a stainless steel sheet, a quartz stone sheet, an organic glass sheet, different static fishes, a static ship and the like, which can be used for simulation demonstration.

Further, the first moving mechanism 20 and the second moving mechanism 30 are both provided with scale values. In this embodiment, the first moving mechanism 20 includes a horizontal mounting seat disposed at the top of the side wall, a horizontal sliding rail disposed on the horizontal mounting seat, and a horizontal sliding block disposed on the horizontal sliding rail; the second moving mechanism 30 comprises a vertical mounting seat, a vertical slide rail and a vertical slide block, wherein two ends of the vertical mounting seat are respectively arranged on the two horizontal slide blocks; and the horizontal mounting seat and the vertical mounting seat are both provided with scale values, so that the relative displacement between the transducer 50 and the target object can be conveniently and visually seen, and the reliability and the accuracy of data are improved.

Further, this science education underwater sound demonstration platform still includes quick-witted case 80, control mechanism 60 sets up in quick-witted case 80, control mechanism 60 includes computer and signal transmission mechanism 70, signal transmission mechanism 70 includes:

the data acquisition card 71 is arranged in the case 80 and used for realizing the mutual conversion of the digital signals and the electric signals of the computer;

a power amplification module 72, configured to boost energy of the electrical signal output by the data acquisition card 71, and load the energy to the transducer 50 through a transceiving conversion module 73; the transceiving conversion module 73 is configured to control conversion between the transmitting end and the receiving end circuit; and

and a filtering and amplifying module 74, configured to perform front-end amplification and filtering processing on the analog electrical signal received by the transceiving conversion module 73 in a receiving end, and transmit the analog electrical signal to the data acquisition card 71.

In specific implementation, the data acquisition card 71 is configured to implement mutual conversion between a digital signal and an analog voltage signal of the computer; the data acquisition card 71 can be at least provided with an analog input channel, an analog output channel and a synchronous trigger channel, the sampling precision of the data acquisition card 71 is 16 bit, and the sampling rate can reach 1000 kS/s. The power amplification module 72 is configured to boost energy of the electrical signal output by the data acquisition card, and load the energy to the transducer 50 through the transceiving conversion module 73, where the maximum working power of the power amplification module 72 may reach 100W, the amplification factor is adjustable, and the working frequency range covers 100kHz to 500 kHz; the transceiving conversion module 73 is used for controlling the conversion of the transmitting end and the receiving end circuit, and can realize the fast switching of the transmitting and receiving modes of the system by inputting high and low levels. The filtering and amplifying module 74 is used in the receiving end to perform front-end amplification and filtering processing on the analog electrical signal received by the transceiving and converting module 73, so as to suppress noise interference, and transmit the analog electrical signal to the data acquisition card 71; the signal amplification factor of the filtering amplification module 74 is adjustable, the central frequency of filtering is 200kHz, and the frequency range of the pass band is 100 Hz-500 kHz.

Further, the transducer 50 is a piston type transceive transducer. In the present embodiment, the transducer 50 is a piston-type transceiver transducer, and functions to convert analog electrical signals into acoustic signals. When the transducer 50 is used as a transmitting sound source, it functions to convert the amplified analog electrical signal into an acoustic signal and radiate the acoustic signal in the water environment; the center frequency of the pool body during working is 250kHz, the working frequency range is 200-300 kHz, the directivity is high, the directivity angle is 16-20 degrees, interface sound reverberation interference of the pool body 10 and the water surface can be effectively reduced, and the demonstration effect of an underwater sound detection test is facilitated. The piston type receiving-transmitting combined energy exchanger is also used for converting sound signals received underwater into analog electric signals and transmitting the analog electric signals to the filtering and amplifying module 74, and the working frequency range of the piston type receiving-transmitting combined energy exchanger is 100 Hz-250 kHz.

Further, the pool body 10 comprises a supporting frame 11 and a water reservoir 12 arranged in the supporting frame 11, wherein a plurality of rollers 13 are arranged at the bottom of the supporting frame 11. In this embodiment, the support frame 11 is made of an aluminum alloy pipe material for supporting the water reservoir 12; the aluminum alloy pipe is square, the side length is 30mm, the thickness is 1mm, and the size of the whole support frame is 1200 x 800 mm; four angles of the bottom surface of the demonstration platform are respectively provided with the idler wheels 13, so that the demonstration platform can be conveniently moved, and the flexibility of the demonstration platform is improved.

Further, the reservoir 12 is made of a transparent material. In this embodiment, the cistern 12 that transparent material made is used for holding the water with simulation underwater sound environment, the size of cistern 12 is 1200 × 800mm, and thickness is 30mm, and its shared ground area is little, and is convenient for the student to observe the demonstration process, makes the underwater sound demonstration more directly perceived.

Further, inside the reservoir 12 is provided with a sound-absorbing wedge 90. In this embodiment, the inboard equidistant a plurality of cistern 12 be equipped with wedge 90, just wedge 90 is made by the rubber material, and thickness is 35mm about its wedge 90, the hypotenuse is 150mm x 150 mm's isosceles triangle, realizes the high frequency noise elimination to reduce the reflection of acoustic signal.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.