Cov hlau ntes mus nrhiav kev kub: qauv, nta, ua hauj lwm hauv paus ntsiab lus

Yog yuav tshawb kom rau kub yog tsis haum rau tag nrho cov hlau detectors. Tus txheem qauv muaj xws li ib tug transmitter nrog ib tug sensor, ib tug me me generator thiab ib tug tswj tsev. Microcontrollers nyob rau hauv pab kiag li lawm khiav hauj lwm rau txawv frequencies. Lub ntsiab tsis muaj lub detectors yog ntaus nqi siab tshaj plaws nyob deb li cas ntawm nrhiav kom tau, cov neeg thiab kuj. Tsis tas li ntawd tsis txhob hnov qab txog lub operating zaus.

Tam sim no cov qauv uas ua nrog high-zoo transmitters uas muaj peev xwm sawv ntawm kev khiav hauj lwm nyob rau hauv ntau hom. Yog xav paub ntau ntxiv txog cov detectors, nws yog tsim nyog los nkag siab txog yuav ua li cas nrhiav kub hlau ntes nyob rau hauv kwj.

hauv paus ntsiab lus ntawm cov lag luam

Standard hlau ntes mus nrhiav kev kub ua hauj lwm los ntawm generating luv luv pulses los ntawm ib tug transmitter. Rau cov me nyuam los tu ntawm qhov rov qab teeb liab siv ib tug microcontroller.

Tus tswj tsev dab cov ntaub ntawv thiab outputs cov ntaub ntawv. Cov pab kiag li lawm txawv nyob rau hauv cov nqe lus ntawm kev qhia. Cov theem ntawm kuj yog ntsuas los ntawm lub sensor. Thaum kawg, tus neeg siv tau txais cov lus qhia txog lub xub ntiag ntawm hlau nyob rau hauv lub hauv av.

qauv Xaiv

Uas hlau mus xaiv mus nrhiav kev kub? Nyob rau hauv kev ua lag luam rau tus neeg siv yuav muaj peev xwm mus nrhiav tau ib tug ntau ntawm compact detectors. Raws li ib tug txoj cai, lawv yuav tau nrog ib tug ib transmitter. Lawv muaj tsawg rhiab heev, thiab lawv tsis muaj peev xwm ua hauj lwm thaum muaj kev kub vaum. Lub undoubted kom zoo dua ntawm cov kev ntes yog khaub-ncaws nyias. Yog li, tus neeg siv yuav hnav lub ntaus ntawv rau ib ntev lub sij hawm, thiab tsis txhob ua ib tug ntau ntawm lub cev dag zog. Tus ntaus ntawv yog powered los ntawm lithium roj teeb uas txawv daim ntawv Tuition Waiver.

Ib txhia kev hloov kho yog ua rau cov uas tuav. Qhov siab tshaj plaws nrhiav deb yog hais txog 50 hli. Muaj ntau cov qauv yog nruab nrog ib tug ruaj ntseg system. Lim muaj kev hloov kho yog siv nrog ib tug impedance ntawm 60 ohms.

Yog hais tias peb xav txog cov hlau ntes "Pirate", ces nws khiav hauj lwm humidity ntawm 55%. yuam kev tau sib npaug zos rau tsis pub ntau tshaj 0.2%. Zoo qauv yog muag nrog npog, thiab yooj yim rau thauj. Nws tseem yog nqi sau cia hais tias koj yuav tsum xaiv lub ntaus ntawv rau qhov zoo cwjmem rau ib tug siv.

Devices nrog ib zaus ntawm 20 kHz

Pheej Yig hlau detectors mus nrhiav kub nyob rau hauv lub 20 KHz yuav tau ua hauj lwm rau cov mos mos hauv av. Kev khiav hauj lwm deb ntawm lawv yog sib npaug zos rau txog 55 hli. Ib txhia kev hloov kho yog ua nyob rau hauv ob sensors. Sensors yog siv nyob rau hauv pab kiag li lawm nrog racks, thiab yog tsis muaj lawv. Tuam haujlwm txais nyob rau ntes, feem ntau yog roj hmab. Ib txhia pab kiag li lawm yog nruab nrog hluav taws xob tswj units uas khiav lag luam rau roj teeb.

Tsis tas li ntawd muaj nqis ntsoov teev yog hais tias lub kuj lawv muaj tsawg, tab sis zoo conductivity. Tag nrho cov no los ua tau ua tsaug rau qhov kev siv ntawm adapters. Yog hais tias koj xaiv ib tug high-zoo qauv, nws yog tsim nyog them sai sai mus rau lub hom. Tag nrho cov no yog tsim nyog los txuag roj teeb lub hwj chim thiab cov kev xaiv ntawm cov pom chaw. Nyob rau hauv tas li ntawd, kws txawj qhia yuav pab kiag li lawm nrog kev transmitters. Lawv muaj siab ripple thiab tsis muaj teeb meem nrog failures.

Qauv 25 kHz

Niaj hnub nimno detectors 25 kHz faib zoo conductivity. Cov pab kiag li lawm yuav khiav lag luam nyob rau hauv ntau hom. Ib co ua qauv muaj ob tug hu transmitter. Qhov tsawg kawg nkaus ua hauj lwm deb ntawm lawv yog 20 mm. Qauv ntawm no hom yog zoo suited mus nrhiav kub nyob rau hauv xau ntawm nruab nrab av noo. Yog hais tias peb xav txog cov hlau ntes "Pirate", ces nws muaj ib tug ua hauj lwm kub ntawm 45 degrees. Sensors yog siv nyob rau hauv versions ntawm 20 MV.

Roj teeb lithium hom siv. Muaj ntau detectors yuav khav hluav taws xob zaub nruab nrog lub suab tshaj tawm. Nws tseem yog nqi sau cia hais tias lub lag luam muaj ib tug ntau ntawm compact qauv ntawm tus nqi tsim nyog.

Ntawm cov shortcomings yuav qhia tau tua sensors. Qhov nruab nrab txoj kab uas hla yog 8 cm. Heev ob peb cov qauv uas ua nrog cov ntxaij lim dej. Ib tug coefficient kev ua yuam kev los ntawm lawv siab.

Hlau detectors ntawm 30 kHz

Detectors 30 kHz yuav tau ua muaj ntau yam transmitters. Lim feem ntau siv los ntawm 4 MV. Lawv muaj zoo conductivity, tab sis tej zaum yuav muaj teeb meem rau cov khoom av. mem nqi nyob rau hauv cov ntaub ntawv no yog nyob rau hauv cov kev tswj chav tsev. Yog hais tias peb xav txog qhov zoo kev hloov kho, ces lawv muaj ib tug hluav taws xob tswj tsev. Nws ua hauj lwm nrog lub suab lus.

Rate limiting kuj nyob rau ntes pib thaum 45 ohms. Muaj ntau pab kiag li lawm yog fuses, thiab roj teeb siv lithium hom. Heev feem ntau muaj cov neeg nrhiav nrog rau cov vibrator. Koj muaj peev xwm txuas qhov headphones yog tias tsim nyog. Kev detectors yog manufactured nrog thoob plaws heev thiab clamping straps. Cov pab kiag li lawm txawv nyob rau hauv cov nqe lus ntawm kev ruaj ntseg. Yog hais tias peb xav txog ib tug qauv uas muaj ib zaug xwb transmitter, qhov yuam kev npaum li cas muaj heev tsis tshua muaj.

tsawg rhiab heev li

Cov neeg feem ntau xaiv uas tsis muaj rhiab heev li. Lawv yog cov pheej yig, thiab muaj peev xwm mus ua hauj lwm nyob rau hauv kev khwv nyiaj txiag hom. Ib txhia kev hloov kho yog tsim rau xau ntawm txawv densities. Nyob ib leeg nws muaj nqis ntsoov teev hais tias tus ntaus ntawv tsis sawv tawm heev meej nrhiav.

Cov kev khiav hauj lwm zaus ntawm lub detectors nyob rau hauv qhov nruab nrab yog 10 kHz. Muaj ntau cov qauv uas tau nrog ib tug ib transmitter. Raws li ib tug txoj cai, nws yog teem kev hom. Lub detectors yog nruab nrog rau tus txheej txheem zaub system. Nws tseem yog nqi sau cia hais tias muaj yog ib tug dlej qauv, tab sis lawv muaj ib tug loj loj.

Detectors siab rhiab heev

siab rhiab heev ntawm lub ntaus ntawv tsim rau cov kev tshawb fawb ntawm kub nyob rau hauv cov pwm chaw. lawv cov kws txawj feem ntau xaiv kuj zoo conductivity. Kws txawj hais tias nws yog tsim nyog los muab kev xaiv li cas los ua qauv nrog kev sensors.

Optimum ua hauj lwm nyob deb sib npaug zos rau 55 hli. Nyob rau hauv rooj plaub no tus kuj piv tsum tsis pub tshaj 45 ohms. Yam tsawg kawg kwv yees ncej thiab lub yas dhos ncaj qha. Vaum los ntawm cov detectors ntawm no hom yog 75%. High-muaj peev xwm roj teeb yog siv raws li lub pab kiag li lawm haus ib tug ntau ntawm lub zog.

Qauv hom Minelab

Yuav ua li cas hlau ntes mus nrhiav kev kub los xaiv? Nyob rau hauv teb lo lus nug no, nws yog ib qho tseem ceeb hais tias lub tuam txhab yog lub Minelab ua chaw tsim tshuaj paus ntawm detectors. Cov assortment ntawm lub tuam txhab muaj ua qauv rau novice kub yooj, raws li zoo raws li rau cov tub txawg. Cov pab kiag li lawm txawv feem ntau ntawm cov kev khiav hauj lwm zaus. Qhov siab tshaj plaws zoo yog hais tias yuav hloov mus rau lub ob hu transmitter. Lawv siv nyias cov ntxaij lim dej thiab rhiab sensors.

Qauv muaj peev xwm ntawm kev khiav hauj lwm nyob txawv av noo thiab cov neeg siv xaiv lub hom. Nyob rau hauv tas li ntawd, nws yog tsim nyog sau cia hais tias muaj yog ib tug compact ntes rau lub lag luam. Lawv muaj luv luv leeg nrog hwj. Qauv txawv nyob rau hauv kev ruaj ntseg. Niaj hnub nimno pab kiag li lawm yog ua los nrog fuses thiab hluav taws xob tswj units. yuam kev tau nyob rau hauv lawv tsis tshua muaj neeg me me.

Cov yam ntxwv Model Minelab X-Terra 305

Qhov no ntes mus nrhiav kev kub npib thiab muaj cov nram qab yam ntxwv: zoo ua hauj lwm deb 55 hli, zaus 20 kHz. Tus ntaus ntawv yog tau khav ib tug zoo rhiab heev, tab sis nws tsuas muaj tib transmitter. Thaum zoo li no sensor yog tsis muaj ib amplifier. Yog hais tias koj ntseeg hais tias lub buyers, tus ntes yog sai sai tshuab txais. Nws muaj ib tug zoo txaus, thiab nws tsis tshua muaj lov.

yuam kev tau sib npaug zos rau 0,02%. Tus ntaus ntawv tej zaum yuav siv nyob rau hauv ib tug ntub ib puag ncig. Nws yog zoo tiv thaiv los ntawm ib lub lim. Tsis tas li ntawd muaj nqis ntsoov teev yog tias cov qauv yog tsis ntshai ntawm kub. Kov thaum lub ntes yog rubberized thiab yog heev nyuaj. Fuse yog tsis tuaj kawm ntawv nyob rau hauv cov ntaub ntawv no, thiab yuav tsum tau cov hlau ntes mus nrhiav kev kub 25620 rubles.

Ntes Series Minelab X-Terra 505

Qhov no hlau ntes mus nrhiav kev kub yog tsim rau beginners. Tus qauv siv ib tug kev transmitter hu hom. Chaw tsim tshuaj paus muab calibration muaj nuj nqi, thiab tus qauv yog sai sai tshuab txais. Yog hais tias koj ntseeg hais tias lub buyers, lub finder yog tso cai rau yuav siv nyob rau hauv siab humidity, thiab txawm tias thaum lub siab tshaj plaws kub nce mus txog 45 degrees.

Zaus ntes yog tsawg kawg yog 5 kHz, li ntawd, lub roj teeb yog sai sai them. kev ua yuam kev coefficient nyob rau hauv ib tug me me kev hloov kho. Yog hais tias peb tham txog cov shortcomings, nws muaj nqis ntsoov teev ib tug ntau ntawm qhov ceeb thawj. Nws muaj tsuas yog ib tug lub mloog pob ntseg nkaus. Tus qauv yog tsis muaj kev co kev xaiv. ntes luag coefficient yog 3 ohms. Taw ntsees hlau ntes mus nrhiav kev kub txog 34900 rubles.