He aha nā ʻano ʻelua o ka mika kahe ultrasonic?

Ua hoʻokaʻawale nui ʻia nā mika kahe ultrasonic i ʻelua mau ʻano nui e pili ana i kā lākou mau loina hana:

1. Nā Mīkini Kahe Ultrasonic Manawa Transit
• Pehea lākou e hana ai:
• E ana i ka ʻokoʻa o ka manawa huakaʻi o nā hōʻailona ultrasonic ma waena o nā transducers ʻelua:
• I lalo (me ke kahe ʻana): Holo wikiwiki ka hōʻailona.
• I luna (e kūʻē i ke kahe): ʻOi aku ka lōʻihi o ka hōʻailona.
• ʻO ka ʻokoʻa o nā manawa transit (\Delta t) ua pili i ka wikiwiki o ke kahe ʻana o ka wai.
• Nā Hiʻohiʻona Koʻikoʻi:
• ʻOi aku ka maikaʻi no nā wai maʻemaʻe a kokoke paha i ka maʻemaʻe (e like me ka wai, nā aila, a i ʻole nā ​​wai haʻahaʻa ka mānoanoa).
• Pololei loa (±0.5% a i ±2.0% ma lalo o nā kūlana kūpono).
• ʻAʻole komo hewa a hoʻohana nui ʻia i nā ʻoihana like ʻole.
• Nā Pōmaikaʻi:
• Hana maikaʻi me nā wai like.
• Kūpono no nā ʻano paipu like ʻole a me nā mea hana.
• Loaʻa nā mea hoʻonohonoho lawe lima a mau loa paha.
• Nā Palena:
• E emi ana ka pololei me nā wai i loaʻa nā pae kiʻekiʻe o nā ʻāpana, nā pehu, a i ʻole nā ​​​​mea haumia.

2. Nā Mīkini Kahe ʻana o Doppler Ultrasonic
• Pehea lākou e hana ai:
• E ana i ka neʻe alapine (hopena Doppler) o nā hōʻailona ultrasonic e hōʻike ana i nā ʻāpana a i ʻole nā ​​pehu i loko o ke wai.
• Hoʻohana ʻia ka ʻokoʻa ma waena o nā hōʻailona i hoʻouna ʻia a me nā hōʻailona i hōʻike ʻia e helu i ka wikiwiki o ke kahe ʻana.
• Nā Hiʻohiʻona Koʻikoʻi:
• Hana ʻia no nā wai me nā ʻāpana i hoʻokuʻu ʻia a i ʻole nā ​​pehu (e like me ka wai hoʻoneoneo, nā slurries, a i ʻole nā ​​wai lepo).
• ʻOi aku ka haʻahaʻa o ka pololei ma mua o nā mika manawa transit (±1.0% a i ±5.0%).
• Nā Pōmaikaʻi:
• Hiki ke ana i ke kahe ʻana i loko o nā wai opaque a i ʻole multiphase.
• Kūpono no nā hana ʻoihana a me nā hana wai hoʻoneoneo.
• Nā Palena:
• Pono ka liʻiliʻi o ka nui o nā ʻāpana a i ʻole nā ​​pehu (maʻamau >100 ppm).
• ʻAʻole kūpono no nā wai maʻemaʻe.

Hoʻolako kēia mau ʻano ʻelua i nā noi like ʻole, me nā mika manawa transit e ʻoi aku ana i ka pololei no nā wai maʻemaʻe a ʻo nā mika Doppler kūpono no nā kahe paʻakikī a i ʻole nā ​​​​kahe hui pū ʻia.