Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pulse compression technology based broadband measurement method for sound velocity and attenuation in sediment

A pulse compression, broadband measurement technology, applied in the direction of processing the response signal of the detection, to achieve the effect of rapid acquisition

Inactive Publication Date: 2015-10-21
NAT DEEP SEA CENT
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, traditional measurement methods are often narrow-band measurements, using CW pulses as the transmission signal, and each measurement result only represents the measurement value at the center frequency of the transmission signal. In order to obtain the measurement results in a certain measurement frequency band, multiple Measurement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pulse compression technology based broadband measurement method for sound velocity and attenuation in sediment
  • Pulse compression technology based broadband measurement method for sound velocity and attenuation in sediment
  • Pulse compression technology based broadband measurement method for sound velocity and attenuation in sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Below in conjunction with accompanying drawing, technical solution of the present invention is described in detail:

[0046] The measurement method of the present invention adopts a glass tank comprising glass water tanks, two glass cylinders of the same size and different heights, a horizontal support, a sliding frame, a signal generator, a power amplifier, a sound source, a hydrophone, a filter, a PCI acquisition card and a computer. measurement system.

[0047] The electrical signal sent by the signal generator is amplified by the power amplifier and then loaded to the sound source. The sound source converts the electrical signal into an acoustic signal. After the sound wave passes through the sediment sample, it is received by the hydrophone and converted into an electrical signal. The electrical signal is measured After the amplifier is amplified and the filter is filtered, it is collected by the PCI acquisition card and stored in the PC for subsequent signal proce...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a pulse compression technology based broadband measurement method for sound velocity and attenuation in a sediment. During sound velocity measurement, firstly the receipt signal when the sound wave only penetrates a glass jar without the presence of a sand sample is recorded, then a sound source and a hydrophone are moved to a thick sand sample side to record a corresponding receipt signal. During attenuation coefficient measurement, the receipt signals penetrating two sand samples of different thicknesses are recorded successively. In the measurement, the receipt signal under each state is collected for at least 30 times, statistic analysis on the measurement results of sound velocity and attenuation coefficient are carried out, and the confidence interval determined by the result of a mean value+ / -standard deviation is taken as the final measurement result. The method provided by the invention can acquire the variation relationship of the sound velocity dispersion and attenuation along with the frequency in the sediment within the measurement band at a time, and provides a new idea for realizing rapid acquisition of the sound velocity and attenuation.

Description

technical field [0001] The invention relates to a method for measuring acoustic parameters of seabed sediment samples in a small-scale space, in particular to a broadband measurement method for sound velocity and attenuation in sediments based on pulse compression technology. Background technique [0002] When carrying out experimental measurements in non-anechoic small-scale spaces such as water tanks, in addition to the sound source direct waves or target reflected waves we hope to obtain, there will often be strong multi-path interference, including from the water surface, the bottom of the tank and the tank wall The reflected wave or scattered wave, and the smaller the experimental water tank or the longer the length of the transmitted pulse, the more serious the multi-channel superposition. Therefore, when measuring the sound velocity and attenuation in sediment samples in a non-anechoic small-scale space, the traditional measurement method is to use pulsed acoustic tec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/44
Inventor 于盛齐于凯本杨志国
Owner NAT DEEP SEA CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com