阅读说明：本技术 一种基于激光接收阵列的湖试声场测量校准装置及校准方法 (Lake test sound field measurement calibration device and method based on laser receiving array ) 是由 魏涛 郭成成 傅仁琦 楼万翔 喻聪 冯凯 孙伟平 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种基于激光接收阵列的湖试声场测量校准装置及校准方法,校准装置主要包括水声换能器、激光发射器、钢结构连接杆A、水听器阵列、激光接收阵列和钢结构连接杆B,激光发射器垂直固定于水声换能器与钢结构连接杆A的连接处,激光接收阵列的首端设置于水听器阵列与钢结构连接杆B的连接处,钢结构连接杆B与360度旋转台相连接。本发明的有益效果为：本发明运用激光发射器与激光接收阵列匹配结构来提高水下声场测试中声源与水听器阵列的正对性特征,根据笔记本显示控制台上的激光接收阵元通道精确计算出声源和水听器阵列的水平距离和垂直高度。弥补了连接杆与旋转台机构转动引起的小角度误差,从而提高水声测试试验的精度和效率。(The invention discloses a lake test sound field measurement calibration device and method based on a laser receiving array, wherein the calibration device mainly comprises an underwater acoustic transducer, a laser transmitter, a steel structure connecting rod A, a hydrophone array, the laser receiving array and a steel structure connecting rod B, the laser transmitter is vertically fixed at the joint of the underwater acoustic transducer and the steel structure connecting rod A, the head end of the laser receiving array is arranged at the joint of the hydrophone array and the steel structure connecting rod B, and the steel structure connecting rod B is connected with a 360-degree rotating platform. The invention has the beneficial effects that: the invention uses the matching structure of the laser transmitter and the laser receiving array to improve the positive characteristic of the sound source and the hydrophone array in the underwater sound field test, and accurately calculates the horizontal distance and the vertical height of the sound source and the hydrophone array according to the laser receiving array element channel on the display control console of the notebook computer. Make up the connecting rod and the revolving stage mechanism and rotated the small-angle error that arouses to improve the experimental precision of underwater sound test and efficiency.)

1. The utility model provides a lake examination sound field measurement calibrating device based on laser receiving array which characterized in that: mainly include underwater acoustic transducer (3), laser emitter (2), steel construction connecting rod A (1), hydrophone array (5), laser receiving array (6) and steel construction connecting rod B (7), laser emitter (2) vertical fixation in the junction of underwater acoustic transducer (3) and steel construction connecting rod A (1), head end (6-1) of laser receiving array (6) set up in the junction of hydrophone array (5) and steel construction connecting rod B (7), on each remaining elementary cell of laser receiving array (6) parallels straightly to be fixed in steel construction connecting rod B (7) in proper order, steel construction connecting rod B (7) are connected with 360 degrees revolving stages (8).

2. The lake test sound field measurement calibration device based on the laser receiving array is characterized in that: the laser emitter (2) is electrically connected with the laser emitting module, and the underwater acoustic transducer (3) is connected with the sound source emitting module; the laser receiving array (6) is connected with the laser receiving module, the hydrophone array (5) is connected with the hydrophone array module, and the laser emitting module and the laser receiving module are respectively connected with the industrial control notebook.

3. A calibration method using the lake test sound field measurement calibration device based on the laser receiving array as claimed in claim 1, characterized in that: the method comprises the following steps:

(1) the underwater acoustic transducer (3) and the hydrophone array (5) are subjected to vertical alignment calibration, so that the emitting surface of the sound source is vertically aligned with the hydrophone array (5); the laser receiving array (6) is numbered, the distance from the head end (6-1) to the acoustic center is half of the height of the hydrophone array (5), a horizontal laser beam is emitted by using a laser emitter (2), the hydrophone array (5) is rotated by a 360-degree rotating platform (8), so that the head end of the laser receiving array (6) receives a laser beam signal, and the acquired laser beam is sent to an industrial control notebook;

(2) and after the underwater acoustic transducer (3) and the hydrophone array (5) are placed at any depth below the lake surface (4), laser beams are emitted, and the hydrophone array (5) is rotated to enable each elementary channel of the laser receiving array (6) parallel to the steel structure connecting rod B (7) to collect laser signals and feed the laser signals back to the industrial control notebook, so that the positive characteristic of the sound field testing environment at any depth below the lake surface and the horizontal distance and the vertical height of the sound source from the hydrophone array are judged.

Technical Field

The invention relates to a measurement and calibration device for a lake test sound field, in particular to a measurement and calibration device and a calibration method for a lake test sound field based on a laser receiving array.

Background

In the beginning of the world, navy of various countries in the world provides a great deal of feasible assumption for the development of navy military equipment aiming at the requirement of national defense safety construction. The sonar system is one of core devices of sea military equipment, and plays a very important role in detecting and identifying suspicious targets, implementing necessary warning and the like. Before a sonar system is put into practical application, strict experimental measurement and calibration must be carried out on acoustic parameter index performance of sonar equipment, such as indexes of directivity, sound field intensity, sound power and the like.

The underwater sound field testing environment is complex and variable, the traditional underwater sound field testing environment is a large-scale silencing water pool, and an infinite free field environment is simulated by utilizing a specific sound absorption wedge, so that the equipment can be suitable for ocean environment simulation to a certain degree. However, the development trend of sonar equipment gradually inclines towards high power and large size, the detection of the sonar equipment in the low-frequency directivity index is greatly limited due to the limitation of the water area space of the silencing water pool, the temperature and the sound velocity of the water area environment at different depths are obviously changed, and the performance of the hydrophone array is also influenced by the depth. With the increase of the depth, the poorer the visual degree of the sound field test environment, the inaccuracy of the positive alignment characteristics of the sound source and the hydrophone can not be guaranteed, the inaccurate distance parameters of the horizontal distance and the vertical height of the sound source from the hydrophone array can not be guaranteed, and the influence on the timeliness and the correctness of the sound field test can be greatly realized. Therefore, the development of a device for ensuring the accurate measurement of the horizontal vertical distance from the positive characteristic of the sound field test of the sound source and the hydrophone array is urgent.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a lake test sound field measurement calibration device and a calibration method based on a laser receiving array.

The object of the present invention is achieved by the following technical means. The utility model provides a calibration device is measured in lake sound field based on laser receiving array, mainly includes underwater acoustic transducer, laser emitter, steel construction connecting rod A, hydrophone array, laser receiving array and steel construction connecting rod B, laser emitter vertical fixation in underwater acoustic transducer and steel construction connecting rod A's junction, the head end of laser receiving array sets up in the junction of hydrophone array and steel construction connecting rod B, on each remaining elementary substance of laser receiving array was parallelly straightly fixed in steel construction connecting rod B in proper order, steel construction connecting rod B was connected with 360 degrees revolving stages.

The laser emitter is electrically connected with the laser emitting module, and the underwater acoustic transducer is connected with the sound source emitting module; the laser receiving array is connected with the laser receiving module, the hydrophone array is connected with the hydrophone array module, and the laser emitting module and the laser receiving module are respectively connected with the industrial control notebook.

The invention provides a lake test sound field measurement calibration method based on a laser receiving array, which comprises the following steps:

1. the underwater acoustic transducer and the hydrophone array are subjected to vertical alignment calibration, so that the emitting surface of a sound source is vertically aligned with the hydrophone array; numbering the laser receiving arrays, enabling the head ends of the laser receiving arrays to receive laser beam signals by utilizing a laser transmitter to transmit horizontal laser beams, rotating the hydrophone arrays through a 360-degree rotating table, and transmitting the acquired laser beams to an industrial control notebook, wherein the distance between the head ends and an acoustic center is half of the height of the hydrophone arrays;

2. and (3) placing the underwater acoustic transducer and the hydrophone array to any depth below the lake surface, emitting laser beams, rotating the hydrophone array to enable each elementary channel of the laser receiving array parallel to the steel structure connecting rod B to collect laser signals and feed the laser signals back to the industrial control notebook, and accordingly judging the positive characteristics of the sound field testing environment at any depth below the lake surface and the horizontal distance and the vertical height of the sound source from the hydrophone array.

The invention has the beneficial effects that: the invention utilizes the matching structure of the laser transmitter and the laser receiving array to improve the positive characteristics of the sound source and the hydrophone array in the underwater sound field test, numbers the laser receiving array, and can accurately calculate the horizontal distance and the vertical height of the sound source and the hydrophone array while ensuring the positive characteristics according to the laser receiving array element channel on the display control console of the notebook computer. Make up the connecting rod and the revolving stage mechanism and rotated the small-angle error that arouses to improve the experimental precision of underwater sound test and efficiency.

Drawings

FIG. 1 is a schematic diagram of the lake surface preliminary calibration of the present invention;

FIG. 2 is a schematic view of a sound field testing environment at any depth below the lake surface according to the present invention;

FIG. 3 is an elevational view of the laser transmitter of the present invention installed;

fig. 4 is a schematic view of the installation of the laser receiving array of the present invention.

Description of reference numerals: 1. the device comprises steel structure connecting rods A, 2, a laser emitter, 3, an underwater acoustic transducer, 4, a lake surface, 5, a hydrophone array, 6, a laser receiving array, 6-1, a head end, 7 and a steel structure connecting rod B, 8 and 360-degree rotating tables.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

as shown in the figure, the lake test sound field measurement and calibration device based on the laser receiving array mainly comprises an underwater acoustic transducer 3, a laser emitter 2, a steel structure connecting rod A1, a hydrophone array 5, a laser receiving array 6 and a steel structure connecting rod B7, wherein the laser emitter 2 is vertically fixed at the connecting position of the underwater acoustic transducer 3 and the steel structure connecting rod A1. After the laser receiving array is numbered in small partitioned blocks, the head end 6-1 of the laser receiving array 6 is arranged at the joint of the hydrophone array 5 and the steel structure connecting rod B7, the rest elements of the laser receiving array 6 are sequentially, parallelly and straightly fixed on the steel structure connecting rod B7, and the steel structure connecting rod B7 is connected with the 360-degree rotating platform 8.

The mechanism is as follows: and rotating the hydrophone array by utilizing a 360-degree rotating platform mechanism to enable the head end of the laser receiving array to receive laser beam signals so as to realize the positive characteristic of the sound field testing equipment. And numbering the laser receiving elements behind the head end and displaying the received signals of each channel in the industrial control notebook. The underwater acoustic transducer 3 (sound source) and the hydrophone array are placed at any depth below the lake surface, and the horizontal distance and the vertical height index of the sound source and the hydrophone array can be obtained by utilizing the laser receiving array.

The laser emitter 2 is electrically connected with the laser emitting module, and the underwater acoustic transducer 3 is connected with the sound source emitting module; the laser receiving array 6 is connected with the laser receiving module, the hydrophone array 5 is connected with the hydrophone array module, and the laser emitting module and the laser receiving module are respectively connected with the industrial control notebook.

A lake test sound field measurement calibration method based on a laser receiving array comprises the following steps:

1. as shown in fig. 1, the laser receiving array 6 is numbered, the distance from the head end 6-1 to the acoustic center is half of the height of the hydrophone array 5, the laser emitter 2 is used for emitting horizontal laser beams, the hydrophone array 5 is rotated by the 360-degree rotating platform 8, so that the head end of the laser receiving array 6 receives laser beam signals, and the collected laser beams are sent to the industrial control notebook; in this case, it is shown that the underwater acoustic transducer 3 (sound source) and the hydrophone array 5 are vertically aligned on the lake surface so that the emission surface of the sound source is vertically aligned with the hydrophone array 5; the laser receiving array head end element collects laser beam signals and feeds the laser beam signals back to the industrial control notebook, and a signal channel at the head end of the notebook receives the laser signals to indicate that the sound source and the hydrophone array are preliminarily aligned.

2. As shown in fig. 2, after the underwater acoustic transducer 3 and the hydrophone array 5 are placed at any depth below the lake surface 4 (the steel structure connecting rod a and the steel structure connecting rod B are both formed by sleeving and fixing a plurality of rods, the number of the rods can be increased according to the required depth, and the same function can be realized by adopting a lifting mechanism), laser beams are emitted, the hydrophone array 5 is rotated to enable each elementary channel of the laser receiving array 6 parallel to the steel structure connecting rod B7 to acquire laser signals and feed the laser signals back to the industrial control notebook, so that the alignment characteristic of the sound field testing environment at any depth below the lake surface and the horizontal distance and the vertical height of the sound source from the hydrophone array are judged.

The device comprises a connecting rod, a rotating table motor and the like, wherein the connecting rod is connected with the rotating table motor, the rotating table motor and the rotating table motor. The characteristics that an underwater sound field is too deep and the visualization degree of the sound field is low are compensated, and the positive characteristic of an underwater sound source and the accurate calculation of the horizontal and vertical distance between the sound source and a hydrophone array can be guaranteed under the condition that the underwater sound field is tested at any depth.

The invention discloses a lake test sound field alignment and horizontal and vertical distance measurement device based on a laser receiving array. The invention can realize the realization of the positive alignment characteristic of the sound source and the hydrophone array under the condition of any underwater depth of the lake test sound field based on the matching of the laser transmitter and the laser receiving array, accurately measure the horizontal distance and the vertical height of the sound source and the hydrophone array under the condition of ensuring the positive alignment characteristic of the sound source and the hydrophone array, and compensate the small-angle error condition brought to the sound field test environment by the connecting rod and the rotating mechanism.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.