Weak underwater acoustic signal simulation and test device

Abstract

The invention relates to a weak underwater acoustic signal simulation and test device, comprising an industrial computer, a connection cable, an adapter and a multipath program control power supply. The industrial computer comprises a computer mainboard, and a multipath synchronous output PCI bus DA board card and a multipath synchronous sampling PCI bus AD board which are both in connection with the computer mainboard; the adapter is in connection with a detected circuit board, and is internally provided with a multistage signal filter circuit board and a multistage signal attenuation circuit board, wherein the multistage signal filter circuit board is internally provided with a multistage simulation signal filter circuit, and the multistage signal attenuation circuit board is internally provided with an active and passive attenuation circuit; the connection cable comprises a DB9 serial port connection cable, a DB37 connection cable and a BNC connection cable. The weak underwater acoustic signal simulation and test device possesses the characteristics of low hardware cost, compact system structure, concise and visual test system operation interface, easy operation, and high test automation, and can automatically generate a preserved form based on a measuring parameter result.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustics, in particular to a weak underwater acoustic signal simulation and testing device. Background technique [0002] This weak underwater acoustic signal simulation and testing device is a device used in the simulation of weak signals output by sonar transducers and automatic measurement of parameters such as the amplitude-frequency characteristic curve of the weak signal conditioning amplifier circuit board and the phase difference between the channels of the circuit under test. The field of underwater acoustics has a wide range of applications and outstanding practical value. [0003] General-purpose test equipment requires multiple DC regulated power supplies, micro-amplitude signal sources and digital oscilloscopes. Currently, high-performance micro-amplitude signal sources and digital oscilloscopes mainly rely on imports from countries such as Denmark and the United States. It is ve...

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Problems solved by technology

[0003] General-purpose test equipment requires multiple DC regulated power supplies, micro-amplitude signal sources and digital oscilloscopes. Currently, high-performance micro-amplitude signal sources and digital oscilloscopes mainly rely on imports from countries such as Denmark and the United States. It is very expensive; and the process of using general-purpose devices to test the amplitude-frequency characteristics of the circuit is relatively cumbersome. Taking the measurement of the 100-point amplitude-frequency characteristic curve as an example, it is necessary to set the signal source frequency point by point and record the amplitude of the output signal of the circuit shown on the oscilloscope point by point. It is a time-consuming and monotonous operation to complete the measurement of all 100 frequency points, and manual reading of the measured values ​​will also introduce additional measurement errors. After the test and data recording are completed, the measurement data needs to be further processed to draw the amplitude-frequency characteristics Curve and calculate the passband bandwidth and center frequency of the circuit

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