振動傳感器的機電變換原理


  一yi般ban來lai說shuo,機ji械xie接jie收shou原yuan理li中zhong隻zhi有you兩liang種zhong振zhen動dong傳chuan感gan器qi,即ji相xiang對dui型xing和he慣guan性xing型xing,但dan在zai機ji電dian轉zhuan換huan方fang麵mian,由you於yu轉zhuan換huan方fang法fa和he性xing能neng不bu同tong,有you多duo種zhong振zhen動dong傳chuan感gan器qi,應ying用yong範fan圍wei也ye很hen廣guang。現xian代dai振zhen動dong測ce量liang中zhong使shi用yong的de傳chuan感gan器qi不bu再zai是shi傳chuan統tong概gai念nian中zhong獨du立li的de機ji械xie測ce量liang裝zhuang置zhi,它ta隻zhi是shi整zheng個ge測ce量liang係xi統tong中zhong的de一yi個ge環huan節jie,與yu後hou續xu的de電dian子zi電dian路lu密mi切qie相xiang關guan。


  
  由於傳感器的機電轉換原理不同,輸出功率也不同。有的將機械量的變化轉變為電勢和電荷的變化,而機械振動量的變化則是電阻、電感等電參數的變化。一般來說,這些電量不能被隨後的顯示、jiluhefenxiyiqizhijiejieshou。yinci,duiyubutongdejidianzhuanhuanyuanlidechuanganqi,bixufujiadaoteshudeceliangdianlushang。celiangdianludegongnengshijiangchuanganqideshuchugonglvzhuanhuanweihouxuxianshihefenxiyiqikeyijieshoudeyibandianyaxinhao。
  
  1、相對式電動傳感器
  
  電(dian)傳(chuan)感(gan)器(qi)是(shi)基(ji)於(yu)電(dian)磁(ci)感(gan)應(ying)原(yuan)理(li)的(de),即(ji)當(dang)移(yi)動(dong)導(dao)體(ti)在(zai)固(gu)定(ding)磁(ci)場(chang)中(zhong)切(qie)斷(duan)磁(ci)線(xian)時(shi),在(zai)導(dao)體(ti)兩(liang)端(duan)產(chan)生(sheng)電(dian)動(dong)勢(shi),因(yin)此(ci)利(li)用(yong)這(zhe)一(yi)原(yuan)理(li)產(chan)生(sheng)的(de)傳(chuan)感(gan)器(qi)稱(cheng)為(wei)電(dian)傳(chuan)感(gan)器(qi)。相(xiang)對(dui)電(dian)傳(chuan)感(gan)器(qi)是(shi)從(cong)機(ji)械(xie)接(jie)收(shou)原(yuan)理(li)出(chu)發(fa)的(de)位(wei)移(yi)傳(chuan)感(gan)器(qi)。由(you)於(yu)電(dian)磁(ci)感(gan)應(ying)定(ding)律(lv)應(ying)用(yong)於(yu)機(ji)電(dian)轉(zhuan)換(huan)原(yuan)理(li)中(zhong),其(qi)產(chan)生(sheng)的(de)電(dian)動(dong)勢(shi)與(yu)被(bei)測(ce)振(zhen)動(dong)速(su)度(du)成(cheng)正(zheng)比(bi),因(yin)此(ci)它(ta)實(shi)際(ji)上(shang)是(shi)一(yi)個(ge)速(su)度(du)傳(chuan)感(gan)器(qi)。
  
  2、電渦流式傳感器
  

  渦wo流liu傳chuan感gan器qi是shi一yi種zhong相xiang對dui非fei接jie觸chu式shi傳chuan感gan器qi,它ta通tong過guo改gai變bian傳chuan感gan器qi末mo端duan與yu被bei測ce物wu體ti之zhi間jian的de距ju離li來lai測ce量liang物wu體ti的de振zhen動dong位wei移yi或huo振zhen幅fu。渦wo流liu傳chuan感gan器qi具ju有you頻pin率lv範fan圍wei寬kuan(0~10 KHz)、線性工作範圍寬、靈敏度高、非接觸測量等優點。它主要用於旋轉機械的靜態位移測量、振動位移測量和軸振動監測。


  
  3、電感式傳感器
  
  根(gen)據(ju)傳(chuan)感(gan)器(qi)的(de)相(xiang)對(dui)機(ji)械(xie)接(jie)收(shou)原(yuan)理(li),電(dian)感(gan)傳(chuan)感(gan)器(qi)可(ke)以(yi)將(jiang)被(bei)測(ce)機(ji)械(xie)振(zhen)動(dong)參(can)數(shu)的(de)變(bian)化(hua)轉(zhuan)化(hua)為(wei)電(dian)參(can)數(shu)信(xin)號(hao)的(de)變(bian)化(hua)。因(yin)此(ci),電(dian)感(gan)傳(chuan)感(gan)器(qi)有(you)兩(liang)種(zhong)形(xing)式(shi),一(yi)種(zhong)是(shi)可(ke)變(bian)間(jian)隙(xi),另(ling)一(yi)種(zhong)是(shi)可(ke)變(bian)磁(ci)導(dao)麵(mian)積(ji)。
  
  4、電容式傳感器
  
  電(dian)容(rong)式(shi)傳(chuan)感(gan)器(qi)一(yi)般(ban)分(fen)為(wei)變(bian)間(jian)隙(xi)型(xing)和(he)可(ke)變(bian)公(gong)用(yong)麵(mian)積(ji)型(xing)兩(liang)種(zhong)。線(xian)性(xing)振(zhen)動(dong)的(de)位(wei)移(yi)可(ke)以(yi)用(yong)變(bian)間(jian)隙(xi)型(xing)來(lai)測(ce)量(liang),扭(niu)轉(zhuan)振(zhen)動(dong)的(de)角(jiao)位(wei)移(yi)可(ke)以(yi)用(yong)變(bian)麵(mian)積(ji)公(gong)式(shi)來(lai)測(ce)量(liang)。
  
  5、慣性式電動傳感器
  
  慣性電傳感器由固定部分、huodongbufenhezhichengdanhuangbufenzucheng。weileshichuanganqichuyuweiyichuanganqidezhuangtai,keyidongbufendezhiliangyinggaizugouda,zhichengdanhuangdegangduyinggaizugouxiao,yejiushishuo,chuanganqiyinggaijuyouzugoudideguyoupinlv。
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