阅读说明：本技术 换能器垂直指向性快速测量系统及其测量方法 (Transducer vertical directivity rapid measurement system and measurement method thereof ) 是由 陈静 李玉娟 于 2020-11-26 设计创作，主要内容包括：本发明涉及换能器垂直指向性快速测量系统,包括：标准水听器；测量放大器,测量放大器与标准水听器连接,用于放大弱信号；带通滤波器,带通滤波器与测量放大器连接,用于滤除带外噪声；数字示波器,数字示波器与带通滤波器连接,用于显示和采集标准水听的接收信号；压力传感器,压力传感器用于检测水深,压力传感器与标准水听器安装在一起,且在水中的深度一致；上位机,上位机分别与数字示波器和压力传感器连接,用于控制测量系统采集、显示垂直指向性图、并保持数据与图像。该系统解决了传统换能器垂直指向性测量系统低效、误差大的缺陷；仅需要2人,约5分钟就可以完成一组数据的测量,大大节省人力成本与时间成本。(The invention relates to a transducer vertical directivity rapid measurement system, comprising: a standard hydrophone; the measuring amplifier is connected with the standard hydrophone and used for amplifying the weak signal; the band-pass filter is connected with the measuring amplifier and is used for filtering out-of-band noise; the digital oscilloscope is connected with the band-pass filter and is used for displaying and acquiring a received signal of the standard hydrophone; the pressure sensor is used for detecting the water depth, and the pressure sensor and the standard hydrophone are installed together and have the same depth in the water; and the upper computer is respectively connected with the digital oscilloscope and the pressure sensor and is used for controlling the measurement system to acquire and display the vertical directivity diagram and keep data and images. The system overcomes the defects of low efficiency and large error of the traditional transducer vertical directivity measurement system; only 2 persons are needed, and the measurement of one group of data can be completed in about 5 minutes, so that the labor cost and the time cost are greatly saved.)

1. Quick measurement system of transducer vertical directivity, its characterized in that includes:

a standard hydrophone;

the measuring amplifier is connected with the standard hydrophone and is used for amplifying weak signals;

the band-pass filter is connected with the measuring amplifier and is used for filtering out-of-band noise;

the digital oscilloscope is connected with the band-pass filter and is used for displaying and acquiring a received signal of the standard hydrophone;

the pressure sensor is used for detecting the water depth, and the pressure sensor and the standard hydrophone are installed together and have the same depth in the water;

and the upper computer is respectively connected with the digital oscilloscope and the pressure sensor and is used for controlling the measurement system to acquire and display a vertical directivity diagram and keep data and images.

2. The method for quickly measuring the vertical directivity of the transducer is characterized by comprising the following steps of:

s1, placing a transducer, a standard hydrophone and a pressure sensor into water, wherein the distance between the transducer and the standard hydrophone is not less than 8 m;

s2, setting a transmitting pitch angle on a sonar display and control console, selecting a single-frequency narrow pulse with a central frequency as a transmitting signal, and controlling a power amplification unit through the sonar display and control console to drive a transducer to transmit in a short period and full power;

and S3, a standard hydrophone and a pressure sensor are placed downwards, and the upper computer starts to acquire and draw a vertical directivity diagram synchronously.

Technical Field

The invention relates to a transducer measuring system, in particular to a transducer vertical directivity rapid measuring system and a measuring method thereof.

Background

The traditional transducer vertical directivity measurement system mainly comprises a standard hydrophone and an acoustic measurement system, and the working flow of the system is as follows: firstly, setting a transmitting pitch angle, selecting a single-frequency narrow pulse with a central frequency as a transmitting signal, driving an energy converter to transmit with short period and full power by a sonar trunk-end power amplification unit, and receiving the transmitting signal by a standard hydrophone. And adjusting the water entry depth of the standard hydrophone at equal intervals while transmitting, and manually reading the amplitude of the received signal through an acoustic measurement system. And finally, drawing a transmitting vertical directivity diagram at different pitching angles according to the amplitude of the received signal.

When the traditional transducer vertical directivity measurement system controls the underwater penetration depth of a standard hydrophone, a method of manually putting down or lifting the standard hydrophone at equal intervals is adopted, and the measurement precision is greatly influenced by the depth interval. The measuring system is low in efficiency, 4 persons are required to cooperate with each other during measurement, the measurement of a group of data can be completed within about 30 minutes, and the measurement process is easy to bring artificial measurement errors.

Disclosure of Invention

In order to solve the problems, the invention provides a transducer vertical directivity rapid measurement system which has high test efficiency and small error, can complete a group of data measurement only by 2 people in a few minutes, and saves the labor cost and the time cost, and the specific technical scheme is as follows:

quick measurement system of transducer vertical directivity includes: a standard hydrophone; the measuring amplifier is connected with the standard hydrophone and is used for amplifying weak signals; the band-pass filter is connected with the measuring amplifier and is used for filtering out-of-band noise; the digital oscilloscope is connected with the band-pass filter and is used for displaying and acquiring a received signal of the standard hydrophone; the pressure sensor is used for detecting the water depth, and the pressure sensor and the standard hydrophone are installed together and have the same depth in the water; and the upper computer is respectively connected with the digital oscilloscope and the pressure sensor and is used for controlling the measurement system to acquire and display a vertical directivity diagram and keep data and images.

The transducer vertical directivity rapid measurement method comprises the following steps:

s1, placing a transducer, a standard hydrophone and a pressure sensor into water, wherein the distance between the transducer and the standard hydrophone is not less than 8 m;

s2, setting a transmitting pitch angle on a sonar display and control console, selecting a single-frequency narrow pulse with a central frequency as a transmitting signal, and controlling a power amplification unit through the sonar display and control console to drive a transducer to transmit in a short period and full power;

and S3, a standard hydrophone and a pressure sensor are placed downwards, and the upper computer starts to acquire and draw a vertical directivity diagram synchronously.

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

the transducer vertical directivity rapid measurement system provided by the invention overcomes the defects of low efficiency and large error of the traditional transducer vertical directivity measurement system; only 2 persons are needed, and the measurement of one group of data can be completed in about 5 minutes, so that the labor cost and the time cost are greatly saved.

Drawings

FIG. 1 is a block diagram of a transducer vertical directivity fast measurement system;

fig. 2 is a software interface of an upper computer of the transducer vertical directivity rapid measurement system.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

Example one

As shown in fig. 1 and 2, the transducer vertical directivity rapid measurement system includes: a standard hydrophone; the measuring amplifier is connected with the standard hydrophone and is used for amplifying weak signals; the band-pass filter is connected with the measuring amplifier and is used for filtering out-of-band noise; the digital oscilloscope is connected with the band-pass filter and is used for displaying and acquiring a received signal of the standard hydrophone; the pressure sensor is used for detecting the water depth, and the pressure sensor and the standard hydrophone are installed together and have the same depth in the water; and the upper computer is respectively connected with the digital oscilloscope and the pressure sensor and is used for controlling the measurement system to acquire and display a vertical directivity diagram and keep data and images.

The measuring amplifier, the band-pass filter and the digital oscilloscope form an acoustic measuring system.

The transmission signal received by the standard hydrophone is output to a measurement amplifier in the acoustic measurement system through a signal line. All instruments in the acoustic measurement system are connected through signal lines, and finally acquired voltage amplitude information of the standard hydrophone is sent to the upper computer software through a data line by an acquisition card on the digital oscilloscope. The pressure sensor sends the acquired water depth information to the upper computer software through a serial port line.

In at least one embodiment, the pressure sensor is a high precision pressure sensor.

The transducer vertical directivity rapid measurement system provided by the invention utilizes the high-precision pressure sensor to acquire the water entry depth of the standard hydrophone in real time and high density, transmits the depth information to the upper computer software through the serial port, and simultaneously, the acoustic measurement system synchronously transmits the acquired received signal amplitude to the upper computer software. And the upper computer software draws and stores the emission vertical directivity diagram according to the depth information and the amplitude information.

The invention overcomes the defects of low efficiency and large error of the traditional transducer vertical directivity measurement system; the measurement system can complete the measurement of a group of data in about 5 minutes by only 2 persons, so that the labor cost and the time cost are greatly saved; and the method is simple and feasible and is easy for engineering realization.

Example two

The transducer vertical directivity rapid measurement method comprises the following steps:

s1, placing a transducer, a standard hydrophone and a pressure sensor into water, wherein the distance between the transducer and the standard hydrophone is not less than 8 m;

s2, setting a transmitting pitch angle on a sonar display and control console, selecting a single-frequency narrow pulse with a central frequency as a transmitting signal, and controlling a power amplification unit through the sonar display and control console to drive a transducer to transmit in a short period and full power;

and S3, downward placing a standard hydrophone and a pressure sensor, synchronously starting to collect and draw a vertical directivity diagram.

The depth range of the standard hydrophone sensor in water is 3-20 meters.

The transducer is placed at the depth of D =10 m under water, the No. 0 beam of the transducer is directed to a standard hydrophone through a slewing device, and the horizontal distance R between the transducer and the standard hydrophone is not less than 8 m.

The transducer is connected with the sonar trunk end.

At the time of transmitting, selecting 'start collecting' on the upper computer software interface shown in fig. 2, and starting to put down the standard hydrophone at a constant speed to control the underwater depth H of the hydrophone_pThe range is 3 meters-20 meters, and in the process of transferring, the high-precision pressure sensor collects the water entry depth of the standard hydrophone in real time, and sends the water entry depth to the upper computer software through a serial port, and meanwhile, the standard hydrophone sends the received signals to an acoustic measurement system through a signal line, and the signals are further amplified, filtered and collected and then sent to the upper computer software through a data line.

When the standard hydrophone is lowered to the depth of 20 meters, the collection is selected to be stopped on the software interface of the upper computer. And selecting a drawing button, drawing a vertical directivity diagram, and storing data and images according to requirements.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.