Shielded Contact Microphone: 6 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Kuv nquag nug yuav ua li cas ua kom huv suab nrov hu xov tooj microphone tsis muaj suab nrov uas feem ntau mus nrog lawv. Cov txheej txheem ntawm kev tsim lub xov tooj sib tham yog yooj yim, tsuas yog txuas ob peb kab rau lub piezoelectric disc thiab koj ua tiav. Nrog rau qhov kev qhia no, Kuv yuav tau txais me ntsis ntxiv rau hauv cov ntsiab lus tshwj xeeb uas kuv tau kawm ntau xyoo.

Ib qho tseem ceeb kom nco ntsoov nrog rau daim ntawv thov lub zog qis yog tias qhov chaw ntawm lub teeb liab yuav raug ua kom nrov dua thiab ib qho hluav taws xob hluav taws xob uas tau khaws los ntawm lub teeb liab hlau hauv koj lub xov tooj kuj tseem yuav ua kom nrov dua nrog nws. Txhawm rau txo qis qis qis los ntawm cov teeb liab xaim, nws yog ib qho tseem ceeb kom ib txwm kaw nws hauv kev tiv thaiv txuas nrog qhov tsis zoo lossis hauv av ntawm koj lub Circuit Court.

Hom cable yog qhov tseem ceeb hauv daim ntawv thov no. Feem ntau cov twj paj nruag thiab lub suab tsis muaj zog yog tso tseg coaxial, txhais tau tias muaj cov teeb liab xaim nyob ib puag ncig los ntawm kev tiv thaiv tsis zoo. Txog kev hu xov tooj mics, cov kab hluav taws xob hloov pauv tau yooj yim ua haujlwm tau zoo tshaj plaws vim tias nws yuav hloov pauv thaum khoov nyob ze ntawm lub xov tooj sib tham ntau dua li pry tawm ntawm cov laug sib koom ua ke ntawm cov khoom siv zoo nkauj piezoelectric. Kuv nyiam siv braided shielding, uas muaj cov voids tsawg dua li yam tsis muaj kev sib tsoo, tab sis tuaj yeem nrhiav tau nyuaj dua. Ib daim ntawv thov raug rau nyias braided coaxial cable yog txuas lub pcb rau rf kav hlau txais xov.

Kauj ruam 1: Teeb

Cov npe thiab cov cuab yeej teev:

10-25mm unsoldered brass disc piezoelectric transducer ~ 30 AWG braided shield stranded coaxial cable xws li Belden 83265 lossis Alpha 9178brass sheet (shim stock).015-.025 "(.4-.5mm) (tuab txaus kom tsis crumple, nyias txaus) kom tsis xav tau rauj tsim) xws li K&S 2-part epoxyrosin core soldervariable kub soldering irondoming block1-1.5cm dapping punchhelping handssmall fast clampwire strippersmixing sticks for epoxy (toothpicks or barbecue skewers) paper for mixing epoxyfine permanent markerpush pinmasking tape

tsis muaj nyob hauv daim duab - txiab

Ua ntej pib: Mount pab txhais tes rau ntawm ntug ntawm koj lub rooj ua haujlwm nrog nrawm nrawm.

Teem cov hlau txuas rau 700F / 370C.

Kauj Ruam 2: Npaj Txhuas Txhuas Txhuas Txhuas Txhuas

Xaiv lub piezoelectric transducer rau koj qhov project. Cov piezos me me yooj yim dua rau hauv thaj chaw me me tab sis tsis nrov nrov lossis tsis hnov zoo li qhov loj. Kuv kuj tseem pom tias me me (10-12mm) piezos yog qhov yooj yim heev rau kev puas tsuaj los ntawm khoov. Kev sib koom ntawm cov khoom siv piezoelectric ceramic thiab cov tooj dag uas nws zaum tsis muaj zog heev thiab nrog qee qhov pheej yig piezos nws muaj peev xwm tev cov ceramic tawm los ntawm kev sib tsoo yam tsis muaj peev xwm pom tau tias daim ntawv cog lus tau tawg.

Tom qab xaiv tus hloov pauv, taug qab nws cov kab ke ntawm daim ntawv tooj dag thiab txiav tawm nrog siv txiab. Lub disc no yuav raug siv los tiv thaiv lub teeb liab xaim tom qab lub piezo tau sib dhos ua ke.

Muab cov tooj dag txiav tawm hauv qhov kev nyuaj siab loj tshaj plaws hauv cov thaiv thaiv thiab tsim los ntawm txhais tes mus rau lub qhov taub tob los ntawm kev sib tsoo thiab ncab nws kom zoo siv lub dapping punch.

Kauj Ruam 3: Sawb thiab Tin Cable thiab Txiav Cov Hluav Taws Xob kom Ntev

Txiav qhov ntev ntawm kab rau koj qhov haujlwm. Nws ib txwm zoo kom muaj ntxiv thiab txiav nws tom qab.

Sawb txog 1.5cm los ntawm qhov kawg ntawm kab ntawv los ntawm kev xaiv qhov ntsuas loj ntawm koj lub xov tooj hluav taws xob me me me dua li txoj kab uas hla ntawm kab.

Siv lub laub thawb lossis tus ntiv tes xoo, cais cov hlua uas xaim ntawm txoj hlua tiv thaiv thiab ntswj rau hauv pob.

Tsho cov fibers hauv cov ntaub thaiv npog nrog cov laug los ntawm kev luv luv tuav cov hlau txuas rau nws thiab tom qab ntawd pub cov laug rau hauv cov cua sov uas ze ntawm cov hlau ntxeev. Qhov no hu ua tinning. Qhov no ua tiav rau ob leeg tuav cov hlua ua ke kom lawv tsis txhob sib dhos thiab ntsaws thiab tseem ua kom yooj yim dua los ntawm kev tiv thaiv kev sib kis thiab oxidation.

Sawb lub teeb liab xaim kom muaj li 2 hli ntawm rwb thaiv tsev ntawm nws lub hauv paus thiab tin nws.

Nrog lub piezo tuav nyob rau hauv qhov chaw nrog kev pab txhais tes, txiav lub teeb liab xaim ntawm lub xov tooj kom nws cov ntsiab lus yog nyob nruab nrab ntawm cov khoom siv ceramic thiab txiav qhov tsis zoo tiv thaiv xaim kom muaj li ntawm 2-3 hli ntawm cov khoom raug rau cov laug rau tooj dag thaub qab disc.

Kauj Ruam 4: Cov Kab Hluav Taws Xob rau Piezo

Muab txoj hlua txuas hla tus piezoelectric transducer siv tes pab kom qhov kawg ntawm lub teeb liab xaim yog nyob nruab nrab ntawm cov khoom siv ceramic thiab cov khoom thaiv thaiv tau kov cov tooj dag ib puag ncig. Sim ua kom lub rwb thaiv tsev sab nraud tawm ntawm ntug ntawm daim disk. Ua txhua yam kom tiaj li sai tau kom ntseeg tau tias yuav tsis muaj cov ntsiab lus pivot qhov twg ib tus tuaj yeem tsoo tawm qhov txuas txuas rau cov khoom siv ceramic piezoelectric.

Solder cov ntaub thaiv npog rau cov tooj dag los ntawm cua sov ob lub disc thiab tiv thaiv ua ke los ntawm kev tuav cov hlau txuas tawm tsam ob qho tib si thiab pub cov laug hauv nruab nrab. Cov laug yuav tsum ntws hauv qab thiab yuav ua kom nrawm nrawm tom qab cov hlau rub tawm. Lub zog sib koom ua ke yuav tsum muaj qhov nkhaus nkhaus thiab cov kab laug sab yuav tsum tshwm ci tom qab nws txias. Qhov taw tes no yog qhov txuas zoo tshaj plaws ntawm cov kab thiab cov hloov pauv.

Txo qhov kub ntawm cov hlau txuas mus rau 650F (350C). Cov tawv nqaij uas tawv nqaij ntawm cov khoom siv ntawm cov khoom hloov pauv tuaj yeem hlawv tawm ntawm qhov kub siab dua qhov no, thiab tseem tuaj yeem ua li ntawd yog tias cov hlau txuas tau tuav nws ntau dua li ib feem ntawm ob. Luckily daim tawv nqaij no lees txais cov laug yog tias koj tuaj yeem tau txais lub teeb liab xaim tso rau qhov yog.

Kho txoj haujlwm ntawm lub teeb liab xaim kom nws tau kov cov khoom siv ceramic. Qee lub sij hawm nws tuaj yeem khoov tag nrho cov kab hluav taws xob rov qab los ntawm cov khoom siv hluav taws xob uas siv cov ntaub thaiv npog ua ib lub pob zeb. Tom qab ntawd kho lub kaum sab xis ntawm lub teeb liab xaim mus rau lub hauv paus uas siv tus tweezers, cov hlau tshem tawm lossis txawm tias cov ntoo sib xyaw. Tom qab ntawd nrog lub teeb liab xaim khoov mus rau lub hauv paus ceramic, khoov tag nrho cov kab rov qab, tiaj tus nrog lub dav hlau ntawm piezo. Qhov no yog qhov kuv feem ntau tawm tsam lub caij nplooj ntoo hlav ntawm cov teeb liab xaim.

Ceev faj thaum khoov kab. Raws li kuv tau piav qhia yav dhau los, nws tuaj yeem yooj yim cais cov khoom siv los ntawm cov thaub qab. Cov khoom no tseem yooj yim rau tawg, thiab ob qho xwm txheej no feem ntau yuav ua rau lub microphone tuag.

Tam sim no, nrog lub teeb liab xaim kov cov khoom siv ceramic thiab cov hlau txuas rau qhov kub qis dua, tso koj lub lauj kaub rau ntawm lub teeb liab xaim thiab nrawm siv cov hlau txuas rau nws kom yaj cov laug thiab txuas lub teeb liab xaim mus rau cov khoom siv ceramic. Qhov me me ua ke zoo dua. Kev sib txuas ntawm cov tawv nqaij tawv ntawm cov khoom siv sib xyaw ua ke thiab cov khoom siv nws tus kheej tuaj yeem dhau los ntawm kev sib koom ua ke (daim tawv nqaij tuaj yeem ua npuas sab nraud me ntsis), yog li cov laug tsawg dua, kev sib txuas hluav taws xob ntau dua. Ceev faj nrog cov kab txuas txuas no, nws tuaj yeem tawg tau yooj yim los ntawm kev khoov cov kab ntawv tsis raug ua ntej txhua yam raug kaw. Yog tias nws tau tawg thiab koj yuav tsum rov muag dua qhov kev sib txuas, qhov ntim tawm los ntawm lub microphone yuav qis dua. Feem ntau, hloov lub piezo disc yog qhov kev xaiv zoo dua li sim kho ib yam dab tsi.

Kauj Ruam 5: Cov ntsiab lus Epoxy Solder

Kuv tau sim ntau hom kev nplaum rau tuav txhua yam ua ke hauv kev hu xov tooj microphones, silicone-based thiab polyurethane-based adhesives, tab sis kuv tseem pom tias epoxies ua haujlwm zoo tshaj plaws rau kev ruaj ntseg cov hlua. Tsib feeb epoxy ua haujlwm zoo tshaj plaws rau cov no, tab sis nco ntsoov, nws tuaj yeem siv qhov twg los ntawm 5-20 feeb rau tsib feeb epoxy los kho (qhuav).

Kuv siv daim kab xev los tuav lub piezo rau ntawm lub rooj thaum ua kom ruaj khov txuas nrog epoxy. Npog daim kab xev (tus neeg pleev xim daim kab xev) tsuas yog nplaum txaus los tuav lub tiaj tiaj, tab sis tsis nplaum heev kom kuv tsis txhob yuam kev txhuam cov tooj dag thaum tshem nws. Ntau zaus ntau dua tsis yog, thaum kuv yuav ua qhov no ntawm cov txheej txheem siv ob tog sib txuas daim kab xev lossis vhb, Kuv yuav rhuav lub mic los ntawm kev tawg cov ceramic thaum tev nws tawm ntawm lub rooj tom qab cov kua nplaum qhuav.

Ua ntej tshaj plaws, muab daim kab xev luv luv rau ib nrab ntev kom ib nrab ntawm cov nplaum tuaj yeem lo rau ntawm koj lub rooj ua haujlwm thiab lwm qhov ib nrab tau tig mus rau saum. Tuav daim kab xev nyob rau hauv qhov chaw thiab creased nrog ob daim ntxiv ntawm daim kab xev ntawm txhua qhov kawg. Muab lub soldered piezo disc tso rau ntawm daim kab xev thiab ruaj ntseg kab rau lub rooj nrog lwm daim npog ntsej muag. Yog tias koj tab tom ua haujlwm ntau dua ib tus hu rau mic, kab lawv rau ntawm kab xev thiab siv epoxy rau txhua tus ntawm ib qib.

Sib tov 2-ntu epoxy nrog tus pas ntoo thiab siv tus pas lo npog lub piezos cov ntsiab lus sib txuas, txuas ntxiv thaj tsam thaj tsam li 2 hli dhau ntawm cov laug. Kuv tsis npog tag nrho thaj chaw ntawm daim disk vim tias qhov sib ntxiv tau ua rau lub suab nrov, tua qee qhov ntawm cov lus teb siab. Khaws lo thiab daim ntawv uas nws tau sib xyaw los txiav txim siab thaum twg epoxy tau tawv.

Kauj Ruam 6: Txuas tooj dag tiv thaiv

Cov kauj ruam kawg yog txuas cov ntaub thaiv npog uas tau tsim ua ntej.

Clip lub piezo disc rau ntawm tes pab (sim tsis txhob zom cov ceramic nrog tus kais dej).

Txiav ib qho thais hauv cov tooj dag tiv thaiv nrog cov txiab rau cov duab ntawm cov hlau thaiv cov hlau txuas sib txuas kom cov tooj dag thaiv tau tiaj tus raws ntug ntawm cov tooj dag. Ceev faj tsis txhob yuam kev kov cov khoom siv sib xyaw ua ke nrog daim hlau thaiv npog

Muab cov tooj dag thaiv rau ntawm daim ntawv piezo thiab tuav rau hauv qhov chaw siv cov kais dej ntawm cov tes pab. Qee zaum nws swb me ntsis thiab siv me ntsis ntawm daim npog qhov ncauj tuaj yeem pab nrog thawj qhov txuas txuas. Kuv nyiam tuav daim ntaub thaiv rau piezo ntawm peb lub ntsiab lus sib npaug. Ob lub ntsiab lus tuaj yeem ua haujlwm, tab sis qhov no tuaj yeem ua haujlwm zoo li pob khawm thiab tseem tuaj yeem nrov nrov ntawm qhov ntau zaus. Ua kom sov lub ntug rau piezo thiab daim ntaub thaiv nrog cov hlau thiab ua tib zoo pub cov khoom sib xyaw ua ke. Tom qab cov kab laug sab tshwm rau ntawm qhov sib txawv, cia nws txias thiab kho qhov thaiv (nws yuav luag ib txwm hloov me ntsis ntawm qhov kev sib txuas ua ntej no) tom qab ntawd muab tshuaj txhuam ntawm ob lub ntsiab lus kawg.

Thiab muaj koj muaj nws. Qee zaum kuv poob qhov no hauv cov roj hmab txheej zoo li plasti-dip, tab sis feem ntau kuv yuav tsuas yog epoxy qhov kev sib dhos no liab qab rau qhov kuv xav tau ua kom nrov nrov. Tom qab qhov no ua tiav cov kab laug sab ntawm lub jack lossis ntsaws thiab koj tab tom taug kev.