There are not any special documents about surveying and studying the three dimensions field intensity distribution in space of bat 國(guó)內(nèi)外在蝙蝠聲場(chǎng)強(qiáng)度分布的系統(tǒng)測(cè)量與研究方面尚無(wú)專(zhuān)門(mén)文獻(xiàn)對(duì)其做出闡述。
But in acoustics the three dimension field intensity distribution in space is an unignorant character of the signal of bat and is very valuble to be researched 而從聲學(xué)本身出發(fā)看待蝙蝠信號(hào),它的空間三維場(chǎng)強(qiáng)分布是不可忽視的一個(gè)特征,有重要的研究?jī)r(jià)值。
Secondly , we expounds theory forecast of the sound field intensity distribution of bat in acoustics and analysis the character of the signal that we collect at present 接著,從聲學(xué)角度闡述對(duì)于蝙蝠聲場(chǎng)強(qiáng)度的分布特征的理論預(yù)測(cè),從理論角度分析我們?cè)诂F(xiàn)階段實(shí)驗(yàn)中所要采集蝙蝠信號(hào)的特性。
We studied the influence of 2d supersoni c slope flow to the far field intensity distribution of 10 . 6um and 1 . 315um laser beam when flow is in different inflow mach number 研究了二維超音速繞楔流動(dòng)在不同馬赫數(shù)下的流場(chǎng)時(shí)均參數(shù)分布對(duì)波長(zhǎng)分別為10 . 6 m 、 1 . 315 m的激光束的遠(yuǎn)場(chǎng)強(qiáng)度分布的影響。
Because there are no special instruments we plan to design a special instrument to study the soud field intensity distribution of bat . we use fix point dsps tms320vc5402 as a core chip which is made by ti 基于目前尚無(wú)合適專(zhuān)用儀器的情況,擬用ti公司生產(chǎn)的54系列定點(diǎn)dsp芯片tms320vc5402為核心自行設(shè)計(jì)一套專(zhuān)用儀器研究蝙蝠聲場(chǎng)強(qiáng)度分布。
The results show : laser beam far field intensity distribution deflect to the wave length increasing direction , the influence to laser beam far field intensity distribution of different inflow mach number is little than the influence of different inflow pressure ; flow field has more aberration to 1 . 315um laser beam than to 10 . 6um laser beam 研究表明激光束遠(yuǎn)場(chǎng)強(qiáng)度分布都向流場(chǎng)光程增大的方向偏折,噴流出口馬赫數(shù)的變化對(duì)激光束遠(yuǎn)場(chǎng)強(qiáng)度分布的影響較小,噴流出口壓力的變化對(duì)激光束遠(yuǎn)場(chǎng)強(qiáng)度分布的影響較強(qiáng);在相同的流場(chǎng)結(jié)構(gòu)下,流場(chǎng)對(duì)波長(zhǎng)1 . 315 m激光束的干擾要明顯強(qiáng)于對(duì)波長(zhǎng)10 . 6 m激光束的干擾。