Zvese zvaunoda kuti uzive nezve AD5933 bioimpedance sensor

Iyo AD5933 ndeimwe yeanonyanya kufarirwa maseketi akasanganiswa kana zvasvika pakuongororwa kwebioimpedance, zvese muzvidzidzo zvekudzidzisa, tsvakiridzo yebiomedical, uye kuvandudzwa kwemidziyo yekuyera. Kunyangwe zviri nyore kutsvaga mamodule ekutengesa uye ehunyanzvi zvinyorwa pamhepo, mashoma emutauro weSpanish anotsanangura nenzira yakapusa uye yakadzama kuti chikamu ichi chinoshanda sei uye mashandisirwo angaitwa mumapurojekiti ekuongorora bioimpedance. Kana iwe uchida kuziva kuti iyo AD5933 inogona kushandura sei yako biomedical sensor mapurojekiti, chinyorwa ichi chine ruzivo rwese rwakakosha rwakaunganidzwa.

Kunzwisisa mashandiro uye kugona kweAD5933 hakungobatsiri mainjiniya nemasaenzi chete, asiwo kune vanogadzira, vadzidzisi, uye kunyangwe vadzidzi vanotarisa kuyera nemazvo kusamira kwematishu kana chero biological kana zvemagetsi zvinhu. Kana iwe uchitsvaga yakadzama wongororo yeAD5933 bioimpedance sensor, ine yakajeka, uye inoshanda tsananguro, ino ndiyo nzvimbo yako.

Chii chinonzi AD5933 uye nei chakakurumbira kudaro?

Iyo AD5933 inoshandura impedance uye network analyzer module ine 12-bit resolution., yakashandiswa zvakanyanya munyika yemagetsi uye bioengineering kuyera kupokana uye reactances digitally uye nemazvo. Basa rayo guru nderekufambisa kuongororwa kwezvinhu, zvikamu zvemagetsi uye kunyange biological tissues uchishandisa nzira yebioimpedance., iyo inobvumira kudzidza kwemagetsi emagetsi emasero uye mvura mukati memuviri wemunhu.

Sei vanhu vazhinji vachitendeukira kuAD5933? Nekuti inobatanidza mabasa epamberi mukati meimwe chip, inobvumira kugadzirwa kwema frequency, chiratidzo chedigitization, uye yemukati data kugadzirisa, zvese zvisingade zvakaoma zvekunze hardware. Izvi zvinoita kuti ive sarudzo yakanaka kune ese ari maviri marabhoritari uye avo vanogadzira inotakurika michina kana kuyedza kumba.

Hukuru hwokugadzira hunhu

• Multi-frequency impedance analyzer module: Inogona kushanda pamusoro pehupamhi frequency renji, ichiita kuti ive yakakodzera kuyera zvese zvakaderera uye zvakakwirira impedance mumashandisirwo akasiyana.
• 12-bit analog-to-digital converter (ADC): Inobvumira kugadzirisa kwakakwana kune akawanda biomedical uye murabhoritari zvikumbiro.
• Sampling rate inosvika 1 megasample pasekondi, yakanakira zvidzidzo zvinoda kukurumidza kutora data.
• Inosanganisira mabasa e yakananga digital synthesis (DDS) nokuda kwechizvarwa chechiratidzo chekusimudzira.
• Inoshanda neyakajairwa marabhoritari voltages uye inogona kudzorwa nemamicrocontrollers, makomputa, uye mabhodhi ekuvandudza akadai seArduino kana Raspberry Pi.

Maitiro ekushanda akadai se kutsvaira mode, iyo inobvumira kudzidza kwakazara kwe impedance kune akasiyana mafrequency, anonyanya kubatsira pakuongorora zvinhu zvakaomarara kana yebiomedical research apo impedance inosiyana ne frequency.

Chii chinoshandiswa mu bioimpedance?

Bioelectrical impedance analysis (BIA) ndeimwe yemashandisirwo makuru eAD5933. Inoshandiswa kuwana ruzivo nezve kuumbwa kwemuviri, hydration, kana kunyange kuonekwa kwemamwe mamiriro ekurapa. nekuyera mhinduro yemagetsi yezvipenyu zvipenyu.

Neiyo AD5933, kuyera bioimpedance kunova nyore, se Iyo chip yakagadzirirwa otomatiki maitiro ekugadzira masaini eAC uye kuverenga mhinduroIzvi zvinoita kuti zvive nyore, semuenzaniso, kudzidza kuti tsandanyama inopindura sei kune ndima yechiratidzo, kana kuongorora kuumbwa kweiyo biological fluid kana tissue sample.

Chimiro chemukati uye kushanda kweAD5933

Mwoyo weAD5933 wakagadzirwa neakasiyana mabhuroki anoshanda, pakati pawo anotevera anobuda pachena:

• DDS (Direct Digital Synthesis) Jenareta: Inokutendera iwe kugadzira inobuda sine wave iyo frequency inogona kugadziridzwa nedhijitari.
• Un mashandiro amplifier akagadziridzwa mune yakaipa mhinduro (negative mhinduro), iyo inoshandisa Rin uye RFB resistors. Iyo amplifier kuwana inoverengerwa seA = - RFB / Rin, kubvumira kupinza kuti kugadziriswe kune yakanakira chiratidzo cheADC.
• 12-bit analog-to-digital converter (ADC): Inoshandura iyo yekuisa analogi chiratidzo (mhinduro kune yedu yekunakidzwa) kuita chiratidzo chedhijitari chinogona kugadziriswa mukati.
• DFT (Discrete Fourier Shanduko) module: Inoita masvomhu kugadzirisa kunodiwa kuti uwane zvese ukuru uye chikamu chemhinduro yakayerwa.

Iko kusanganiswa kwezvivharo izvi kunobvumira kuyera zvese zvinodzivirira uye zvinogadzirisa zvikamu zve impedance.

Detailed operation: kubva pakukurudzira kusvika pakuyera

Iyo impedance kuyerwa maitiro neAD5933 inotevera akateedzana matanho akakosha:

1. Iyo DDS jenareta inogadzira inochinjana voltage chiratidzo ane frequency yatinogona kuronga digitally.
2. Ichi chiratidzo chinopfuura nemuchinhu kana matishu kuti ayerwe, uye Mhinduro inounganidzwa nemukati mekushanda amplifier, iyo inoshandisa maviri resistors kudzora kuwana.
3. Iyo ADC inodhijita chiratidzo chekupindura, uye zvino, iyo DFT module inoita discrete Fourier shanduko kuti iparadzanise zvikamu kuti zvive zvechokwadi uye zvekufungidzira.
4. Chekupedzisira, aya maitiro anoshandiswa kuverenga iyo yakazara impedance (Z), pamwe nezvikamu zvayo: kuramba (R) uye reactance (X).

Kutenda kune yemukati dhizaini yeAD5933, zvinogoneka Automate calibration uye gadzira sisitimu nekuyera zvikamu zvereferenzi usati watora zviyero chaizvo, iyo inovandudza zvakanyanya kururama kwemigumisiro.

Maitiro ekuverenga impedance neAD5933 (nhanho nhanho math)

Yemagetsi impedance kuyerwa kwakavakirwa pane akareruka mafomula, asi zvakakosha kuti unzwisise iyo yakazara maitiro kudzivirira kukanganisa:

• Gain Calibration (g): Kuti unyatsoona hukama pakati pechiratidzo chekuisa uye mhinduro, iyo AD5933 inobvumira kushandiswa kweiyo calibration resistor ine kukosha chaiko kunozivikanwa. Iyo inotevera formula inoshanda:

g = (VDD × Rcurrent × Rin) / (256 × PGA × Upeak × RFB × 2^7)

• Kuwana ukuru: Kana iwo chaiwo uye ekufungidzira hunhu hwayerwa, isu tinoverenga hukuru hwemhinduro se:

mag = sqrt(chaiyo^2 + fungidziro^2)

• Yekupedzisira impedance kuverenga:

Z = g × mag

• Chikamu (PA) chinoverengerwa ne:

PA = arctan2(chaiyo, yekufungidzira) − deltaPA

• Pakupedzisira, kuramba uye kuita kunowanikwa:

R = Z × cos(PA)

X = Z × chivi(PA)

Kuti uwane kurongeka kwakanyanya, zvinokurudzirwa kuita chiyero chekutanga nekuyera zvikamu zvinozivikanwa. (semuenzaniso kukosha chaiko resistors) uye gadzirisa kuwana chaiko kweiyo system zvichienderana nezviyero izvozvo.

Mafungiro anoshanda kana uchishandisa iyo AD5933

Paunenge uchishanda neAD5933, pane zvishoma zvakakosha zvekuchengeta mupfungwa kuti uwane zvakanyanya kubva mukuita kwayo:

• Rin uye RFB resistor kumisikidzwaKusarudzwa kwezvikamu izvi kunotarisa kuwana kwehurongwa. Kushandisa hunhu hwakakodzera, zvichibva pane huwandu hwezvipingamupinyi zvatinoda kuyera, zvakakosha kuti tidzivise kugutsa ADC kana kurasikirwa nechisarudzo.
• Ngwarira chikamu: Iyo AD5933 inosuma yakarongeka chikamu chekuchinja chinogona kusiyanisa ne frequency, saka zvinokurudzirwa kugadzirisa chikamu (deltaPA) uchishandisa zvinozivikanwa zviyero muhuwandu hwehuwandu hwekufarira.
• Dynamic range limitations: Kunyangwe ichishanda pa12 bits, iyo chaiyo yekugadzirisa inoenderana neiyo impedance renji iri kuyerwa uye kurongeka kwakaringana kwenzvimbo yekuwana uye PGA (programmable kuwana amplifier).
• Kudzora kuburikidza neI2C: Iyo chip inotaurirana kuburikidza neI2C bhazi, zvichiita kuti zvive nyore kusanganisa nemhando dzese dze microcontrollers uye mapuratifomu.

Kufunga kwese uku kunoita kuti kushandisa AD5933 kuve nyaya yekunyatso gadzirisa madhizaini, nekuwanda kwekushandisa murabhoritari uye kune avo vanoda kugadzira midziyo yavo yekurapa yakapfava.

Zvakanakira pane mamwe masystem ekuyera

Kuenzaniswa nemamwe ma module epamba kana masisitimu, Iyo AD5933 inorerutsa dhizaini yezviridzwa zvebioimpedance nekuti inobatanidza chizvarwa chechiratidzo, digitization, uye maverengero ekutanga.Izvi zvinoderedza huwandu hwezvikamu zvekunze, mutengo, uye nguva yekuvandudza. Uyezve, iko kurongeka kwayo uye kuita kwakasiyana-siyana kunoita kuti iwedzere kukwezva kune zvekudzidzisa zvikumbiro, kukurumidza prototyping, uye avo vari kutsvaga compact uye yakavimbika mhinduro.

Inowanikwawo mune akasiyana mafomati, kubva kune yepakutanga chip yakapihwa neAnalog Devices kune akagadzirira-kushandisa-modules uye mabhodhi anogona kuwanikwa zviri nyore pamapuratifomu seAmazon, eBay, AliExpress, uye vatengesi vemagetsi vakaita saFarnell, DigiKey, uye Newark.

Ndekupi kwekutenga uye chii chekufunga usati watenga?

Kuzivikanwa kweAD5933 kunoita kuti zvive nyore kuwana mune zvese zvakajairika uye zvehunyanzvi zvitoro zvepamhepo. Amazon uye eBay vane akagadzirira-ku-kubatanidza modules. kumasisitimu ako, nepo zvitoro zvemagetsi zvine hunyanzvi zvakaita seFarnell, DigiKey, uye Newark zvinopa iyo nyanzvi vhezheni kubva kuAnalog Devices. AliExpress inopawo akawanda ekiti uye kunyange mamodule ekukurumidza kusimudzira.

Usati watenga, Izvo zvakakosha kuti utarise mamiriro eiyo module (itsva uye isina kushandiswa kana iwe uchitsvaga yakanyanya kuvimbika), iyo inosanganisira zvinyorwa zvehunyanzvi uye, kana iwe uri wekutanga, kit yekuvandudza iyo ichakubatsira iwe kutanga nekubatanidza uye yekutanga kuyedzwa. Uyewo teerera kune zvakawanda zvakadai sepini inoenderana, magetsi ekupa, uye rudzi rwekukurukurirana (I2C ndiyo inonyanya kuzivikanwa).

Inoenderana modules uye zvakajairika accessories

Pamusika iwe unowana shanduro dzeAD5933 mune module kana yekuvandudza bhodhi fomati, iyo inowanzo sanganisira:

• Standard connectors uye jumpers kuitira kukurumidza kugadzirisa.
• Zvimwe zvinhu zvakaita seamplifiers, calibration resistors uye mafirita kuvandudza kururama uye kugadzikana kwechiyero.
• Zvakawanda zvinobuda uye mapini anoenderana neArduino, Raspberry Pi kana kunyange STM32 makadhi.

Mamwe makiti anosanganisira tambo, zvinyorwa, uye kunyange software yekufambisa kubatanidzwa nePC yako. Kana ukaronga kuishandisa kuongororwa kwebioimpedance, tsvaga ma modules anosanganisira instrumentation amplifiers kana maseketi ekupinza akagadzirirwa chaizvo kushanda nemaelectrodes uye biological signals.

Kubatanidza iyo AD5933 nemapuratifomu ebudiriro

Imwe yemhando huru dzeAD5933 ndeye Kuenderana kwayo nemapuratifomu akavhurika uye nyore-ku-program madhiraivhaUnogona kushandisa Arduino, Raspberry Pi, ESP32, kana chero microcontroller ine I2C interface kudzora chip uye kugadzirisa data. Kune maraibhurari uye mienzaniso yekodhi yepamhepo inoita kuti kugadzirisa uye kuunganidza data kuve nyore, uye iwe unogona kutumira mhinduro kuPC yako kana kutombozviona munguva chaiyo paLCD skrini.

Izvi zvakagonesa vese vagadziri uye nyanzvi kugadzira inotakurika inotakurika bioimpedance yekuongorora zvishandiso zvemitambo, zvekurapa, uye zvedzidzo zvekushandisa.

References uye technical zvinyorwa

Kune mamwe mapurojekiti epamberi kana kana iwe uchida kukwiridzira dunhu rako, Iyo yepamutemo Analog Devices dhetabheti ndiyo yakakosha sosiPamusoro pezvo, kune zvinyorwa zvehunyanzvi, zvakaita sebasa raLeonid Matsiev, iro rinoongorora zvakadzama matorero akazara eiyo AD5933 kugona, kugumira kwayo, uye maitiro akakwana ekugadzirisa.

Pamapuratifomu akaita seInstructables, unogona kuwana nhanho-ne-nhanho madhairekitori uye tutorials pakuita iyo AD5933 mune akasiyana maapplication, anosanganisira schematics, software mienzaniso, uye matipi ekuvandudza huchokwadi.

Iyo AD5933 yakaratidza shanduko mune zvemagetsi chiridzwa nekuda kwekugona kwayo kubatanidza chizvarwa chechiratidzo, analog-to-digital shanduko, uye kugadzirisa data kuita dunhu rimwe chete. Izvi, zvakasanganiswa nekureruka kwayo kwekutora uye kuwanikwa kwemabhodhi anofambirana ebudiriro, inoita kuti ive mhinduro yakanaka kune avo vari kutsvaga kuyera impedance nemazvo uye zvinokwanisika. Kuishandisa mumapurojekiti ebioimpedance kunovhura musuwo wezvishandiso zvitsva muhutano, mitambo, dzidzo, uye kuyedza kumba, zvichibvumira nyanzvi uye maamateurs kuwana mhinduro nekuvimbika uye nyore.