一種新型生物聲納導(dǎo)盲儀的研究與開(kāi)發(fā)
發(fā)布時(shí)間：2019-05-17 21:36
【摘要】：關(guān)心和幫助盲人是社會(huì)文明進(jìn)步的重要標(biāo)志,利用仿生原理開(kāi)發(fā)一種實(shí)用、低廉、便攜導(dǎo)盲器材是幫助盲人的新的技術(shù)手段。本文基于國(guó)家自然科學(xué)基金研究(編號(hào)：60772004),針對(duì)目前超聲波導(dǎo)盲器材提供的信息量少、價(jià)格昂貴等問(wèn)題,提出了一種新型的仿蝙蝠聲納導(dǎo)盲儀,該導(dǎo)盲儀吸收了蝙蝠聲納的優(yōu)點(diǎn),對(duì)物體的距離、方位、大小、形狀等均有較好的體現(xiàn)。本文分析了蝙蝠聲納的基本特征,論證并設(shè)計(jì)了以DSP為核心、雙通道采集、立體聲輸出方案,制作原理樣機(jī)并開(kāi)展了相關(guān)試驗(yàn)。首先,在分析蝙蝠聲納脈沖特點(diǎn)的基礎(chǔ)上,模擬蝙蝠聲納脈沖的基本形式,設(shè)計(jì)了恒頻(CF)和調(diào)頻(FM)兩種探測(cè)波源；然后針對(duì)回波信號(hào)降頻輸出的問(wèn)題,提出了等比例降頻方法,并使用信號(hào)重構(gòu)的方法解決了等比例降頻方法中有效信號(hào)頻率集中、播放時(shí)間短兩個(gè)關(guān)鍵問(wèn)題,保留了有效信號(hào)的幅值變化,提高了不同物體的回波信號(hào)特征的區(qū)分度；此外,還設(shè)計(jì)并制作了聲納導(dǎo)盲儀的全套軟硬件,包括回波信號(hào)發(fā)射接收模塊、DSP主控模塊、音頻DA輸出模塊、電源模塊、波源數(shù)據(jù)產(chǎn)生與輸出程序、雙路回波信號(hào)采集程序、音頻信號(hào)輸出程序、信號(hào)重構(gòu)算法程序、鍵盤功能程序等。本論文設(shè)計(jì)制作的聲納導(dǎo)盲儀經(jīng)測(cè)試表明：信噪比較高、探測(cè)距離可達(dá)8m、探測(cè)廣角約為34°、探測(cè)物體分辨度可達(dá)1.5cm。與現(xiàn)有裝置最大的區(qū)別是該裝置對(duì)物體的距離、方位、形狀等特征均有較好的復(fù)現(xiàn)能力,具備了較好的導(dǎo)盲潛力。由于本研究處于該研究領(lǐng)域的前沿,其研究結(jié)果對(duì)導(dǎo)盲技術(shù)和生物聲納技術(shù)研究具有參考意義。
[Abstract]:Caring for and helping the blind is an important symbol of the progress of social civilization. Using the bionic principle to develop a practical, cheap and portable blind guide device is a new technical means to help the blind. Based on the research of the National Natural Science Foundation of China (No. 60772004), aiming at the problems of less information and high price provided by ultrasonic blind guide equipment, a new type of bat Sonar guide blind instrument is proposed in this paper. The guide blind instrument absorbs the advantages of bat Sonar and embodies the distance, azimuth, size and shape of the object. In this paper, the basic characteristics of bat Sonar are analyzed, and the two-channel acquisition, stereo output scheme with DSP as the core is demonstrated and designed, the prototype is made and the related experiments are carried out. Firstly, based on the analysis of the characteristics of bat Sonar pulse, the basic form of bat Sonar pulse is simulated, and two kinds of detection wave sources, constant frequency (CF) and frequency modulation (FM), are designed. Then, aiming at the problem of frequency reduction output of echo signal, the equal proportion frequency reduction method is proposed, and the method of signal reconstruction is used to solve the two key problems of effective signal frequency concentration and short playback time in equal proportion frequency reduction method. The amplitude change of the effective signal is retained, and the discrimination of the echo signal characteristics of different objects is improved. In addition, the whole set of software and hardware of Sonar guide blind instrument is designed and manufactured, including echo signal transmitting and receiving module, DSP main control module, audio DA output module, power supply module, wave source data generation and output program, dual echo signal acquisition program. Audio signal output program, signal reconstruction algorithm program, keyboard function program and so on. The Sonar guide blind instrument designed and fabricated in this paper shows that the signal-to-noise ratio (SNR) is high, the detection distance can reach 8m, the detection wide angle is about 34 擄, and the resolution of the detected object can reach 1.5 cm. The biggest difference between the device and the existing device is that the device has good repetition ability to the distance, azimuth, shape and other characteristics of the object, and has a good blind guidance potential. Because this study is in the forefront of this research field, its research results have reference significance for blind guidance technology and biological Sonar technology.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH789
本文編號(hào)：2479424
[Abstract]:Caring for and helping the blind is an important symbol of the progress of social civilization. Using the bionic principle to develop a practical, cheap and portable blind guide device is a new technical means to help the blind. Based on the research of the National Natural Science Foundation of China (No. 60772004), aiming at the problems of less information and high price provided by ultrasonic blind guide equipment, a new type of bat Sonar guide blind instrument is proposed in this paper. The guide blind instrument absorbs the advantages of bat Sonar and embodies the distance, azimuth, size and shape of the object. In this paper, the basic characteristics of bat Sonar are analyzed, and the two-channel acquisition, stereo output scheme with DSP as the core is demonstrated and designed, the prototype is made and the related experiments are carried out. Firstly, based on the analysis of the characteristics of bat Sonar pulse, the basic form of bat Sonar pulse is simulated, and two kinds of detection wave sources, constant frequency (CF) and frequency modulation (FM), are designed. Then, aiming at the problem of frequency reduction output of echo signal, the equal proportion frequency reduction method is proposed, and the method of signal reconstruction is used to solve the two key problems of effective signal frequency concentration and short playback time in equal proportion frequency reduction method. The amplitude change of the effective signal is retained, and the discrimination of the echo signal characteristics of different objects is improved. In addition, the whole set of software and hardware of Sonar guide blind instrument is designed and manufactured, including echo signal transmitting and receiving module, DSP main control module, audio DA output module, power supply module, wave source data generation and output program, dual echo signal acquisition program. Audio signal output program, signal reconstruction algorithm program, keyboard function program and so on. The Sonar guide blind instrument designed and fabricated in this paper shows that the signal-to-noise ratio (SNR) is high, the detection distance can reach 8m, the detection wide angle is about 34 擄, and the resolution of the detected object can reach 1.5 cm. The biggest difference between the device and the existing device is that the device has good repetition ability to the distance, azimuth, shape and other characteristics of the object, and has a good blind guidance potential. Because this study is in the forefront of this research field, its research results have reference significance for blind guidance technology and biological Sonar technology.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH789
【參考文獻(xiàn)】
相關(guān)期刊論文 前7條
1 葛立峰;靜電聲和超聲傳感器的進(jìn)展(英文)[J];安徽大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年03期
2 曲天書(shū);曹松濰;吳璽宏;;雙耳時(shí)間差和強(qiáng)度差與聲源距離線索關(guān)系的研究(英文)[J];北京大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年06期
3 劉吉海;李生斌;柳恒敏;馬�；�;;小型開(kāi)關(guān)電源產(chǎn)生噪聲的機(jī)理及濾波器設(shè)計(jì)[J];電氣傳動(dòng)自動(dòng)化;2009年02期
4 楊明;;開(kāi)關(guān)電源噪聲的形成及抑制方法[J];艦船電子對(duì)抗;2006年03期
5 任寶華;揭開(kāi)耳機(jī)的奧秘 耳機(jī)(換能器)的機(jī)理結(jié)構(gòu)和種類[J];家用電器;2004年07期
6 何山;;模數(shù)混合采集系統(tǒng)設(shè)計(jì)中的噪聲抑制[J];微型機(jī)與應(yīng)用;2010年06期
7 于連甲;盲人手杖的國(guó)家標(biāo)準(zhǔn)[J];中國(guó)康復(fù);1998年04期
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