倒車雷達由哪些部分構成
1、超(chao)聲(sheng)(sheng)波(bo)傳感(gan)器:用(yong)于發射以及(ji)接收超(chao)聲(sheng)(sheng)波(bo)信號,通過超(chao)聲(sheng)(sheng)波(bo)傳感(gan)器可以測(ce)量(liang)距(ju)離(li)。
2、主機:發射正弦波(bo)脈沖給超聲(sheng)波(bo)傳感器(qi),并處理其接收到的信號(hao),換算(suan)出距離值后,將數(shu)據與顯示器(qi)通訊。
3、顯示器或蜂(feng)鳴器:接收主機距(ju)(ju)(ju)離(li)(li)數(shu)據,并根據距(ju)(ju)(ju)離(li)(li)遠近顯示距(ju)(ju)(ju)離(li)(li)值和提供(gong)不同級(ji)別的距(ju)(ju)(ju)離(li)(li)報警音(yin)。
倒車雷達探頭的用途
倒車雷達探頭:為(wei)了(le)研(yan)究和(he)利用超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo),人們已經設(she)計和(he)制(zhi)成(cheng)了(le)許多超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)發(fa)生(sheng)(sheng)器(qi),超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)探頭、運(yun)用倒(dao)車雷達探頭。總體上講,超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)發(fa)探頭可以分(fen)為(wei)兩大類:一(yi)類是用電(dian)(dian)氣(qi)方式(shi)產(chan)生(sheng)(sheng)超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo),一(yi)類是用機(ji)械(xie)方式(shi)產(chan)生(sheng)(sheng)超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)。目前較(jiao)為(wei)常用的是壓電(dian)(dian)式(shi)超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)發(fa)生(sheng)(sheng)器(qi)。其(qi)有(you)兩個壓電(dian)(dian)晶(jing)片(pian)和(he)一(yi)個共(gong)(gong)(gong)振板,當(dang)它的兩極外加(jia)脈沖(chong)信(xin)號(hao),其(qi)頻率等于壓電(dian)(dian)晶(jing)片(pian)的固有(you)振蕩頻率時(shi),壓電(dian)(dian)晶(jing)片(pian)將會發(fa)生(sheng)(sheng)共(gong)(gong)(gong)振,并帶動(dong)共(gong)(gong)(gong)振板振動(dong),便產(chan)生(sheng)(sheng)超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)。反之,如果兩電(dian)(dian)極間未外加(jia)電(dian)(dian)壓,當(dang)共(gong)(gong)(gong)振板接收到超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)時(shi),將壓迫(po)壓電(dian)(dian)晶(jing)片(pian)作(zuo)振動(dong),將機(ji)械(xie)能轉換為(wei)電(dian)(dian)信(xin)號(hao),這時(shi)它就成(cheng)為(wei)超(chao)(chao)(chao)(chao)聲(sheng)(sheng)波(bo)探頭了(le)。
倒車(che)(che)雷達測距:倒車(che)(che)雷達探頭在某一(yi)時刻(ke)發出(chu)(chu)超聲波(bo)信號(hao),遇到(dao)被(bei)(bei)測物體(ti)后反射回來(lai),被(bei)(bei)倒車(che)(che)雷達接收到(dao)。只要(yao)計算(suan)(suan)出(chu)(chu)超聲波(bo)信號(hao)從發射到(dao)接收到(dao)回波(bo)信號(hao)的(de)時間,知道在介質中的(de)傳播速度,就(jiu)可(ke)以計算(suan)(suan)出(chu)(chu)距被(bei)(bei)測物體(ti)的(de)距離。
倒車雷達探(tan)頭(tou)可(ke)以帶外殼和線,也可(ke)以是裸探(tan)頭(tou)產品經高低(di)溫老(lao)化,性能(neng)穩(wen)定(ding)。外徑(jing)尺寸從(cong)10mm到22mm多種(zhong),一般根據需要設計各(ge)種(zhong)型號規格探(tan)頭(tou)。
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