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Bat of the field distribution measurement system as a whole to achieve

Author: YangXueMei
Tutor: WangShuangWei
School: Northeast Normal University
Course: Circuits and Systems
Keywords: Echolocation DSP Programming on line Sound field intensity distribution
CLC: TB525
Type: Master's thesis
Year: 2004
Downloads: 36
Quote: 0
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Abstract


Bat acquires the information from ecology environments almost depending on its hearing completely, because it can use the echolocation effectively. Bat has an important status in ecosystem with its unique sound behavior so that it is significant to research the behavior of echolocation. Now researching their echolocation in ecology concentrates in time-frequency characters of signals. But in acoustics the intensity distribution of sound field in space is a character of the signal of bat that can not be neglected. Furthermore, the calls of bats are supersonic pulse, so it is very necessary to use special digital signal processing equipments. Digital signal process technology has been a very key science more and more. And DSP, this kind of chip having a special architecture for some arithmetic, helps us to process some digital signals. The aim of this paper is to design a data acquisition PCB, which applied in measuring the intensity distribution of sound field, with a chip of DSP. Firstly, the paper introduced the echolocation and pointed the science significance to measure the sound field. In addition the theory of DSP is told. The paper designs the circuit in a very efficient way by using module method. The design includes hardware and software and the paper puts emphases on these modules including DSP, analog signals, PC interface, FLASH programming on line and so on. During hardware design briefness and stability of data transferring are considered. During software design, cooperating with hardware design effectively is considered. Lastly the results of the research is analyzed and the whole system design is summarized. And with DSP and programming FLASH on line it is flexible to upgrade the system.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Acoustic measurements > Measurement of the sound field
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