Yintoni iseli yomthwalo?
I-Wheatstone bridge circuit (ngoku esetyenziselwa ukulinganisa ubunzima kumphezulu wesakhiwo esixhasayo) yaphuculwa yaza yathandwa nguSir Charles Wheatstone ngo-1843 yaziwa kakuhle, kodwa iifilimu ezicekethekileyo ze-vacuum ezifakwe kule sekethi endala eyazanywayo kwaye yavavanywa. okwangoku. Iinkqubo zokubeka ifilim ezibhityileyo aziyonto intsha kushishino. Le ndlela yobuchule isetyenziswa kwizicelo ezininzi, ukusuka ekwenzeni ii-microprocessors ezintsonkothileyo ukuya kwi-resistance echanekileyo ye-gages yoxinzelelo. Kwiigeji zoxinzelelo, iigaji zefilim ezicekethekileyo ezithatywe ngokuthe ngqo kwi-substrate egxininisiweyo lukhetho olususa uninzi lweengxaki ezijongene "ne-bond strain gages" (ekwaziwa ngokuba ziigeji zefoil, iigeji zoxinzelelo olumileyo, kunye ne-silicon strain gages).
Kuthetha ukuthini ukukhuselwa komthwalo ogqithisileyo weseli yomthwalo?
Iseli nganye yomthwalo yenzelwe ukuphambuka phantsi komthwalo ngendlela elawulwayo. Iinjineli zongeza olu phambuko ukwandisa uvakalelo lwenzwa ngelixa ziqinisekisa ukuba ulwakhiwo lusebenza ngaphakathi kwendawo yayo "elula". Emva kokuba umthwalo ususiwe, isakhiwo sesinyithi, esiphambukisiweyo kunye nommandla we-elastic, sibuyela kwisimo saso sokuqala. Izakhiwo ezidlula lo mmandla we-elastic zibizwa ngokuba "zilayishwe ngokugqithisileyo". I-sensor egcwele kakhulu idlula "i-deformation yeplastiki," apho isakhiwo sitshintsha ngokusisigxina, singaze sibuyele kwisimo saso sokuqala. Nje ukuba iplastiki ikhubazeke, inzwa ayisaboneleli ngemveliso ehambelana nomthwalo osetyenzisiweyo. Kwiimeko ezininzi, ngumonakalo osisigxina kwaye ongenakuguqulwa. “Ukukhuselwa komthwalo ogqithisileyo” luphawu loyilo olunciphisa ngomatshini ukuphambuka okupheleleyo kwenzwa ngaphantsi komda obalulekileyo womthwalo, ngaloo ndlela ikhusela inzwa kwimithwalo engalindelekanga ephezulu okanye eguquguqukayo enokuthi ngenye indlela ibangele ukuguqulwa kweplastiki.
Indlela yokumisela ukuchaneka kweseli yomthwalo?
Ukuchaneka kwenzwa kulinganiswa ngokusebenzisa iiparitha ezahlukeneyo zokusebenza. Ngokomzekelo, ukuba inzwa ilayishwe kumthwalo wayo omkhulu, kwaye emva koko umthwalo uyasuswa, amandla oluvo lokubuyela kwisiphumo esifanayo somthwalo we-zero kuzo zombini iimeko ngumlinganiselo we "hysteresis". Ezinye iiparamitha zibandakanya Ukungahambelani, Ukuphindaphinda, kunye neCreep. Nganye kwezi parameters yodwa kwaye inepesenti yayo impazamo. Sidwelisa zonke ezi parameters kwi-database. Ukufumana ingcaciso ethe kratya yobugcisa yale migaqo ichanekile, nceda ubone uluhlu lwethu lwamagama.
Ngaba unazo ezinye iinketho zemveliso yeeseli zakho zomthwalo kunye nezinzwa zoxinzelelo ngaphandle kwe-mV?
Ewe, iibhodi ze-off-the-shelf zokulungisa i-shelf zifumaneka ngamandla ukuya kwi-24 VDC kunye neentlobo ezintathu zeenketho zokuphuma zikhoyo: 4 ukuya kwi-20 mA, 0.5 ukuya kwi-4.5 VDC okanye i-I2C yedijithali. Sihlala sibonelela ngeebhodi ezithengiswayo kwaye zilungelelaniswe ngokupheleleyo kwinzwa yomthwalo omkhulu. Izisombululo zesiko zinokuphuhliswa kuyo nayiphi na enye iprotocol yemveliso.
Ixesha lokuposa: May-19-2023
