Shuohao Cai, mudzidzi wezveudoctorate musainzi yevhu, anoisa sensor rod ine multifunction sensor sticker inobvumira kuyerwa kwakadzama muvhu paYunivhesiti yeWisconsin-Madison Hancock Agricultural Research Station.
MADISON — Mainjiniya veYunivhesiti yeWisconsin-Madison vakagadzira masensa anodhura zvishoma anogona kupa nguva dzose, kutarisa nitrate munguva chaiyo mumhando dzevhu dzakajairwa dzeWisconsin. Masensa aya emagetsi akadhindwa anogona kubatsira varimi kuita sarudzo dzakanyatsojeka dzekutarisira zvinovaka muviri uye kuwana mabhenefiti ehupfumi.
“Masensa edu anogona kupa varimi kunzwisisa zviri nani mamiriro ekudya kwevhu ravo uye huwandu hwenitrate inowanikwa kuzvirimwa zvavo, zvichivabatsira kusarudza nemazvo kuti vanoda fetireza yakawanda sei,” akadaro Joseph Andrews, mubatsiri wepurofesa paHarvard University. Chidzidzo ichi chakatungamirirwa neChikoro cheMechanical Engineering paYunivhesiti yeWisconsin-Madison. “Kana vakakwanisa kuderedza huwandu hwefetireza yavanotenga, kuchengetedza mari kunogona kuva kwakakosha kumapurazi makuru.”
Nitrates chinhu chakakosha pakukura kwezvirimwa, asi nitrates dzakawandisa dzinogona kubuda muvhu dzopinda mumvura iri pasi pevhu. Rudzi urwu rwekusvibiswa runokuvadza vanhu vanonwa mvura yemutsime yakasviba uye runokuvadza nharaunda. Sensor itsva yevaongorori inogona kushandiswawo sechishandiso chekutsvagisa kwekurima chekutarisa nitrate leaching uye kubatsira kugadzira nzira dzakanakisa dzekuderedza migumisiro yayo inokuvadza.
Nzira dziripo dzekutarisa nitrate yevhu dzinoda simba rakawanda, dzinodhura, uye hadzipi ruzivo rwechokwadi. Ndosaka nyanzvi yemagetsi akadhindwa Andrews nechikwata chake vakaronga kugadzira mhinduro iri nani uye isingadhuri.
Muchirongwa ichi, vaongorori vakashandisa nzira yekudhinda yeinkjet kugadzira sensor yepotentiometric, rudzi rwe sensor ye electrochemical yakatetepa. Ma sensor epotentiometric anowanzo shandiswa kuyera nitrate nemazvo mumhinduro dzemvura. Zvisinei, ma sensor aya haawanzo kukodzera kushandiswa munzvimbo dzevhu nekuti zvidimbu zvevhu zvakakura zvinogona kukwenya ma sensor uye kudzivirira kuyerwa kwakarurama.
"Dambudziko guru ratakanga tichiedza kugadzirisa nderekutsvaga nzira yekuita kuti masensa aya emagetsi ashande zvakanaka mumamiriro evhu akaoma uye kuona maion enitrate nemazvo," akadaro Andrews.
Mhinduro yechikwata yaive yekuisa jira re polyvinylidene fluoride pa sensor. Sekureva kwaAndrews, chinhu ichi chine hunhu huviri hwakakosha. Chekutanga, chine maburi madiki kwazvo, angangoita 400 nanometers muhukuru, izvo zvinoita kuti nitrate ions ipfuure nepakati uku ichivhara zvidimbu zvevhu. Chechipiri, inonyungudika mumvura, kureva kuti, inokwezva mvura uye inoinwa sechipanji.
"Saka chero mvura ine nitrate yakawanda ichanyanya kupinda mumasensa edu, izvo zvakakosha nekuti ivhu rakafananawo nesiponji uye ucharasikirwa nehondo panyaya yehunyoro hunopinda musensa kana usingakwanise kunyudzwa mvura zvakafanana. Kugona kwevhu," akadaro Andrews. "Uyu hunhu hwe polyvinylidene fluoride layer hunotibvumira kuburitsa mvura ine nitrate yakawanda, kuiendesa pamusoro pesensa uye kuona nitrate nemazvo."
Vaongorori vakatsanangura kufambira mberi kwavo muchinyorwa chakaburitswa munaKurume 2024 mujenari reAdvanced Materials Technology.
Chikwata chakaedza sensor yavo pamhando mbiri dzakasiyana dzevhu dzine chekuita neWisconsin—ivhu rejecha, rinowanikwa munzvimbo dzekuchamhembe-pakati penyika, uye matope evhu, anowanikwa kumaodzanyemba kwakadziva kumadokero kweWisconsin—uye vakaona kuti sensor dzakaburitsa mhinduro dzakarurama.
Vaongorori vava kubatanidza sensor yavo yenitrate musystem yemasensa inoshanda zvakawanda yavanodaidza kuti "sensor sticker," umo mhando nhatu dzakasiyana dzemasensa dzinoiswa pamusoro pepurasitiki inochinjika vachishandisa glue backing. Masticker aya anewo masenser ehunyoro netembiricha.
Vaongorori vachabatanidza zvinamira zvinonzwa zvakawanda padanda, vozviisa pakakwirira zvakasiyana, vozoviga danda racho muvhu. Izvi zvakavabvumira kutora zviyero pakadzika kwakasiyana kwevhu.
"Nekuyera nitrate, hunyoro uye tembiricha pakadzika kwakasiyana, ikozvino tinogona kuverenga maitiro ekubvisa nitrate uye kunzwisisa kuti nitrate inofamba sei muvhu, izvo zvaisakwanisika kare," akadaro Andrews.
Muzhizha ra2024, vaongorori vanoronga kuisa tsvimbo dzemasensa makumi matatu muvhu paHancock Agricultural Research Station neArlington Agricultural Research Station paYunivhesiti yeWisconsin-Madison kuti vaedzezve sensor iyi.
Nguva yekutumira: Chikunguru-09-2024