Zvinodiwa zveUnyanzvi zveElevator Display Hardware Zvinotariswa neVatengesi Vazhinji

Chinyorwa chino chinotsanangura zvakarongeka zvinhu zvinomwe zvakakosha zvehunyanzvi zvekutenga skrini yekushambadzira yeelevator kubva pamaonero evagadziri, zvichisanganisira mhando yedisplay panel, kukwirirana kwepasi uye electromagnetic, kushandiswa kwesimba, mhinduro dzenetwork, kutevedzera kuchengetedzeka, kukwirirana pakati pemaoperating systems neCMS, uye kuchinjika kwezvakatipoteredza. Izvi zvinobatsira vagadziri veB2B kutenga kugadzira hurongwa hwakakwana hwekuongorora tekinoroji.

 1、 Hunhu hwepaneru yekuratidzwa - kupenya, resolution, uye kona yekuona

Mota yeelevator inzvimbo diki yakavharwa, uye daro rekuona rinoita kuti vafambi vamire mukati rive pasi pemamita maviri. Kusiyana nemasikirini ekunze anowanzo da zviuru zvema nit ekupenya, nzvimbo dzeelevator dzemukati dzine zvinodiwa zvakajeka zvemapaneru ekuratidzira. Tave tichipa vatengi vepasi rose kwemakore mazhinji uye takapfupisa ma core parameter akati wandei - izvi ndizvo zvinhu zvekutanga zvaunofanira kutarisa kana uchigamuchira chero sikirini yeelevator.

 1.1 Zvinodiwa pakupenya

Nzvimbo yemuchinda wemumba ine ma nit 350-500 yakakwana. Kana chinda chiri munzvimbo isina kuvhurika zvakanyanya kana munzvimbo ine zuva rakananga, zvinokurudzirwa kuti chive nema nit 700 emapaneli. Mitemo yeChina Elevator Association inosimbisawo pfungwa iyi - nzvimbo dzemumba dzemazuva ano hadzifanirwe kupenya zvakanyanya, kupenya kwakanyanya kunogona kukonzera kuneta kwekuona, uye ruzivo rwemufambi haruna kunaka munzvimbo dzakavharirwa.

 1.2 Maitiro Ekugadzirisa

1080p Full HD ndiyo nzira inoshanda pakushambadzira masikirini eelevator. Pahukuru nedaro rekuona elevator, musiyano wekuona kwevanhu wakaganhurirwa kumapaneru e4K, asi mutengo wacho wakakwira zvikuru. Standard yeChina Elevator Association inoda resolution yeasingasviki 800 × 600 uye angle yekuona yeasingasviki 70 ° munzira nhatu - iyi ndiyo nzira yekupinda, uye zvinokurudzirwa kushandisa 1080p senzira yekutanga yekutenga chaiyo.

 1.3 Kona yekuona

Nzvimbo yemota yeelevator yakamanikana, uye vafambi vanogona kuona sikirini kubva kumativi akasiyana. Panel yeIPS inopa kona yekuona yakafara 178°, ichifukidza nzvimbo dzese dziri mukati memota yeelevator. Kunyangwe mapaneru eTN akachipa, ane kona yekuona yakamanikana uye kukanganisa kukuru kwemavara kana akatariswa kubva padivi, izvo zvinoderedza zvakanyanya mhedzisiro yekushambadzira. Masikirini ese eelevator atinogadzira anouya akajairwa nemapaneru eIPS, ayo asiri ekusarudza asi chinodiwa chikuru.

Kuti uone zvese tsanangudzo ye lifti yekuratidzwa panel, unogona kutarisa peji redu rechigadzirwa, iro rinopa kuenzanisa kwakadzama kwemaparameter ehukuru hwakasiyana hwemapaneru..

Key parameter reference tsika:

 2、 Kuenderana kweMagetsi neMagetsi (EMC)

Izvi zvinowanzo furatirwa pakutenga, asi ndiwo musiyano mukuru pakati pezviratidziro zveelevator nezviratidziro zvemabhizinesi zvemazuva ese. Maelevator anogadzira kudedera kunoramba kuripo panguva yekushanda - mota inofamba ichikwira nekudzika ichitevedza nzira dzekutungamira, simba rekuvhurika nekuvharwa kwemasuo, uye kudedera kwemuchina kunokonzerwa nekushanda kwemuchina wekubata. Panguva iyi, elevator motor uye cable system zvinogadzira kupindirana kwemagetsi. Izvi zvinhu zvezvakatipoteredza zvinopa zvinodiwa zvakakosha kuti skrini yekuratidzira ive yakavimbika.

 2.1 Mapaneru emhando yeindasitiri uye MTBF

MTBF (nguva iri pakati pekukundikana) yepaneru yemhando yeindasitiri inofanira kunge iri kupfuura maawa 50000. Iyi haisi nhamba yekusarudza - inoratidza zvakananga kuvimbika kwepaneru munzvimbo inoshanda nguva dzose. Hupenyu hwekugadzira mapaneru emhando yevatengi hunowanzova hwakaderera pane uyu mwero, uye anoora nekukurumidza munzvimbo dzinotenderera dzeelevator. Mitsetse yedu yese yezvigadzirwa inoshandisa mapaneru emhando yeindasitiri, ane MTBF yemaawa angangoita 50000 pafekitori.

 2.2 Dhizaini Inoenderana Nemagetsi

Chitupa cheEMC chinovimbisa kuti chiratidziro chinoshanda zvakanaka munzvimbo ine electromagnetic yeelevator, chisingakanganiswi nekukanganiswa kunokonzera kuratidzwa kwechidzitiro chisina kujairika kana kuburitsa masaini anopindira anokanganisa sisitimu yekudzora elevator. Izvi zvakakosha pakuchengetedza—chero mudziyo unokanganisa mashandiro akajairika esisitimu yekudzora elevator unorambidzwa. Pakutenga, zvakakosha kusimbisa kuti chigadzirwa chapasa mwero wekuyedza weEMC wakakodzera.

Zviratidzo zveKutenderera kweMagetsi uye EMC Key Performance:

• MTBF ≥ Maawa zviuru makumi mashanu (Chinodiwa chikuru chemapaneru emhando yeindasitiri)
• Chitupa cheEMC: Chinovimbisa kutevedzera bvunzo dzakakodzera dzeIEC/EN
• Dhizaini yekuvaka kwepasi: Chigadziko chekumashure chakasimbiswa, chivharo chekuisa pasi chepasi
• Zvikamu zvemaindasitiri: Zvakasiyana nemhinduro dzevatengi, zvichiita kuti pave nekugadzikana kwenguva refu

Takambotaura nevamwe vatengi vakatanga vasarudza masikirini ekuratidza kuti vasashandise mari yakawanda. Zvisinei, mukati megore, matambudziko akadai sekudzima-dzima kwesikirini uye interface isina kugadzikana akaonekwa, uye mutengo wekutsiva nekugadzirisa wakakwira zvakanyanya kupfuura musiyano wekutanga wemutengo wekutenga. Ndinovimba munhu wese anogona kutora chidzidzo ichi seyambiro.

 3、 Kuwanikwa kwesimba uye kushandiswa kwesimba

Dhizaini yemagetsi ine chekuita zvakananga nekureruka kwekuisa uye mari yekushandisa kwenguva refu, uye zvakare chinhu chikuru pakutarisira dzimba dzekuvaka. Mota yeelevator inowanzo kupa AC110-2220V power interface, uye skrini yekuratidza inofanirwa kuenderana ne voltage range iyi. Panyaya yekushandisa simba, kana uchitarisira purojekiti ine mazana emaelevator, musiyano wesimba rinoshandiswa pa watt imwe neimwe uchiwedzerwa nehuwandu nenguva yekushanda, musiyano wemari yemagetsi pagore ndewechokwadi.

 3.1 Dhizaini yeVoltage Yakafara uye Simba Rakaderera

Kupinza magetsi eAC110-20V pahupamhi chinhu chakakosha, chakakodzera zvinodiwa pamagetsi munzvimbo dzakasiyana pasi rose. Simba rinoshandiswa panguva imwe chete re≤ 1W dhizaini inoenderana nezvinodiwa pasi rose zvekushandisa simba zvakanaka - mapurojekiti mazhinji anoda kuti masikirini ekushambadzira ave ari muchimiro chekumirira chine simba shoma panguva isiriyo-nguva dzekushanda pane kudzimwa zvachose, izvo zvinokanganisa zvakananga mabhiri emagetsi. Takaita gadziriso yakawanda mukutarisira magetsi, ndosaka makambani akawanda ekutarisira zvivakwa ari kusarudza mhinduro yedu.

 3.2 Simba rekutarisa rakayerwa

Simba rakatarwa rinosiyana zvichienderana nehukuru hwechidzitiro, heino huwandu hwereferensi hwakapihwa：

• Saizi diki (15-21 inches): Simba rekushanda rakajairika re25-45W
• Saizi yepakati (22-32 inches): Simba rekushandisa rakajairika 50-90W
• Saizi hombe (inopfuura 32 inches): Simba rekushanda rakajairika 100-200W

Pakutenga zvakawanda, zvinokurudzirwa kuverenga mutengo wekushandisa simba pagore zvichibva pasimba rakatarwa. Semuenzaniso, tichitora sikirini ye30inch, ine simba rekushanda re50W uye maawa gumi nematanhatu ekushanda pazuva, mutengo wemagetsi unoverengerwa zvichibva pakushandiswa kwemagetsi mumaindasitiri, uye mutengo wemagetsi wegore negore weyuniti imwe chete ungangoita madhora mashanu kusvika makumi mashanu ekuAmerica. Kana paine mazana emaelevator, bhiri remagetsi rose imutengo mukuru - nhamba iyi inofanirwa kuongororwa nekungwarira panguva yekusarudza.

 4、 Chirongwa chekubatanidza network

Mhinduro yekubatanidza network ndeimwe yezvinhu zvakaoma zvikuru pakuisa masikirini ekushambadzira eelevator. Sei uchitaura izvozvo? Nekuti elevator shaft inonyanya kushandiswa seFaraday cage - madziro emota dzesimbi uye zvivakwa zvekongiri zvakasimbi zvinodzivirira zvakanyanya masaini asina waya. Kudzikiswa kwechiratidzo cheWiFi kwakanyanya, uye masaini e4G/LTE haagone kushandiswa mutsime. Uyu musungo wakasangana nemapurojekiti mazhinji ekushambadzira elevator kekutanga.

 4.1 Chirongwa chekudzoreredza kushandiswa kwewaya newaya isina waya

Nzira yakanakisisa yatinokurudzira ndeyekugadzirisa kubatanidza newaya nerutsigiro rwewaya. Kubatana neEthernet kunopa kutapurirana kwedata kwakasimba uye kwakavimbika, zvichiita kuti ive nzira inofarirwa yekuvandudza zviri mukati uye manejimendi yemudziyo. WiFi ine mabhendi maviri (2.4GHz+5GHz) inoshanda sekubatanidza kwekuchengetedza uye inochinja otomatiki kana waya yakanganiswa. Pamamiriro ezvinhu apo mamiriro echiratidzo anobvumira, 4G module inogona kusarudzwa sedanho rechitatu rekudzivirira. mhinduro yekuratidza kukwirira kwekutengeseranas ichapa mazano ekugadzirisa network zvichienderana nemamiriro epurojekiti, kusanganisira dhizaini ye network topology uye kusarudzwa kwemidziyo.

 4.2 Kukanganiswa kwenetiweki uye kuronga kwakangwara kweAI

Sisitimu yeCMS inofanira kutsigira basa rekudzimwa kwenetwork uye kutamba - mudziyo unotamba otomatiki zviri mukati menzvimbo kana network isipo, uye unosanganisa otomatiki update mushure mekunge network yadzorerwa. Mhinduro dzakanyanya kunaka dzakaunza kuronga kwemukati kwakangwara kweAI, uko sisitimu inogadzirisa otomatiki nzira dzekugovera zvemukati zvichibva pamamiriro ebandwidth yenetwork, hunhu hwenguva, uye profile yevateereri. Semuenzaniso, tanga nekuisa zvinhu zvevhidhiyo pfupi pakutanga, batanidza zviri mukati memifananidzo nezvinyorwa panguva yebandwidth yakaderera, uye uve nechokwadi chekuti playlists dzinogara dzichienderana nenguva.

Kuenzanisa kweNetwork Solutions:

 5、 Kuchengetedzeka uye kutevedzera zvivakwa

Mumamiriro ezvinhu akakosha emaelevator, kuchengetedzeka hakusi poindi yekuwedzera, asi muganho wekupinda. Chidzitiro chekushambadza cheelevator chakaiswa chakatarisana nevafambi, uye vafambi (kusanganisira vana) vanogona kubata, kusendama, kana kutobonderana nechidzitiro. Panguva iyi, mota yeelevator inzvimbo yakavharwa, uye kudzivirira moto kwezvinhu kunokanganisa zvakananga kuchengetedzeka kwevafambi. Nyika dzakasiyana nenzvimbo dzine mitemo yadzo yekuchengetedza yekuisa michina mukati memaelevator, asi zvinodiwa zvikuru zvinoenderana.

  5.1 Zvinhu Zvinodzivirira Girazi Nemoto

Girazi rakanyoroveswa re3mm ndiro rinoshandiswa muindasitiri pakudzivirira mapaneru - rinodzivirira kukwenywa, rinodzivirira kukuvadzwa, uye haribudise zvidimbu zvakapinza kunyangwe rakatyoka. Chigadziko chegoko chinofanira kusangana nechiyero cheUL94 V-0 chinodzivirira murazvo, chinova chiyero chepamusoro-soro chekudzivirira murazvo kuti chive nechokwadi chekuti chinhu chacho hachizorambi chichitsva kana moto wavhurika. Hatimbofi takataura chokwadi panyaya iyi, sezvo chero kubvumirana panyaya dzekuchengetedza kunogona kukonzera migumisiro isingatsungiririki.

 5.2 Kuchengetedzwa kwechimiro chekuisa

Chigadziko chekuisa nezvinhu zvekugadzirisa zvinofanirwa kutsungirira mutoro wekuchengetedza wakapetwa kakawanda kupfuura huremu hwemidziyo, uye kuve nedziviriro yekuchengetedza yechipiri kudzivirira michina kuti isadonhe kana zvikamu zvikuru zvekugadzirisa zvikakundikana netsaona. Izvi zvakakosha zvikuru muindasitiri yeelevator, sezvo zvinosunga zvinogona kusuduruka nekufamba kwenguva munzvimbo dzinodedera dzemidziyo.

Zvinodiwa zvekuchengetedza uye kutevedzera mitemo:

• Dziviriro yepamberi: ≥ Girazi rinodziya re3mm (rinodzivirira kukwenya uye rinodzivirira kukuvadzwa)
• Goko rinodzoreredza moto: UL94 V-0 giredhi (chiyero chepamusoro-soro chinodzivirira moto)
• Kuiswa kwechimiro: dhizaini yekudzivirira kwekuchengetedza yechipiri (anti kuwa)
• Kutevedzera zvitupa: Wana zvitupa zvekuchengetedza zvinoenderana nemusika waunoda

Fekitori yedu inoshanda pamwe chete nemasangano anopa zvitupa panguva yekugadzira chigadzirwa kuti ive nechokwadi chekuti chigadzirwa chega chega chinosangana nemitemo yekuchengetedza yemusika wekutengesa kunze kwenyika. Kana uri kushanda papurojekiti inoyambuka miganhu, danho iri rinofanira kurongwa pachine nguva.

 6、 Kuenderana pakati pe operating system neCMS

Kusarudzwa kwesystem yekushandisa neCMS (Content Management System) kunosarudza kushanda zvakanaka uye mutengo wekushanda kwenguva refu uye manejimendi yemidziyo. Iyi haisi nyaya yehunyanzvi chete - inokanganisa zvakananga basa rekutarisira masikirini zuva nezuva. Shamwari dzakabata mazana emasikirini dzinofanira kunzwisisa zvakadzama: CMS yakanaka inogona kuita kuti mashandiro ave anoshanda, nepo CMS isina kunaka inogona kukunetesa.

 6.1 Android vs Windows

Sisitimu yeAndroid yakakodzera ruzhinji rwezviratidziro zve elevator - ine mitengo inodzoreka, ecology yakakura, uye kugadzirisa zvinhu nenzira inochinjika. Sisitimu yeWindows yakakodzera mapurojekiti anoda kumhanyisa maapplication chaiwo edesktop kana kuenderana nesoftware yekare. Sarudzo dzese dziri mbiri dzine zvadzinobatsira, zvinoenderana nezvaunoda chaizvo pakushanda. Isu tinotsigira sarudzo dzese dziri mbiri, uye vatengi vanogona kusarudza zvinoenderana nehunhu hwepurojekiti.

 6.2 Kugona kukuru kwe cloud CMS

Kukosha kukuru kwe cloud CMS kuri mukutarisira kure - hapana chikonzero chekushandisa mudziyo wega wega panzvimbo, uye zvese zvigadziriso zvemukati me terminal uye mamiriro emudziyo zvinogona kutarisirwa kuburikidza ne cloud. Mabasa makuru anofanirwa kusanganisira:

• Kutungamira kwezviri kure uye kuronga hurongwa hwezvinhu
• Kukanganiswa kwenetiweki uye kuwiriranisa otomatiki
• Kutarisa kwenguva chaiyo uye alarm yemamiriro emidziyo
• Kutarisira mapoka emasiraidhi akawanda uye mashandiro emabatch

Kudzidza maitiro kuratidzwa kwekushambadzira kwepamusoro kunobatanidzwa nepuratifomu yeCMSs, unogona kutarisa magwaro edu ehunyanzvi hwechigadzirwa. Chishandiso cheCMS chakagadzirwa nefekitori yedu chakazvimiririra chinotsigira zvese terminal yeAndroid neWindows, zvichipa vatengi ruzivo rwekugadzirisa zviri mukati kamwe chete.

 7、 Kuchinjika kwezvakatipoteredza

Maelevator anoparadzirwa munzvimbo dzakasiyana dzemamiriro ekunze nemarudzi akasiyana ezvivakwa - kubva kuzvivakwa zvekugara zvirefu zvisina kupisa munguva yechando kuchamhembe kusvika kumakomboni ekutengeserana ane hunyoro hwakawanda mumaguta ari kumahombekombe kumaodzanyemba. Chiratidziro chinofanira kuenderana nemamiriro ezvinhu aya anochinja. Kuedza kuchinjika kwezvakatipoteredza ndeimwe yematanho akaomarara mukugadzira chigadzirwa.

 7.1 Kuchinjika kwemamiriro ekunze tembiricha nehunyoro

Tembiricha yekushanda inofanira kunge iri pakati pe0-55 ℃, iyo inofukidza nzvimbo zhinji dzekuisa elevator. Tembiricha yepamusoro kana yakaderera inogona kuda imwe nzira yekudziisa kana kupisa. Hunyoro hwacho hunogona kuchinja hunenge huri pakati pe10-90% RH (hapana kunyorova), zvichiita kuti michina ikwanise kushanda zvakanaka munzvimbo dzine hunyoro hwakawanda (senge mwaka wekunaya kwemvura kumaodzanyemba).

 7.2 Kurapa kwekudzivirira kupenya

Kurapa kweAnti-glare (AG) kwakakosha zvikuru munzvimbo dzeelevator. Mwenje we fluorescent uri mukati meelevator uye zuva rakananga rinopinda mulobby zvinogona kukonzera kupenya kwakanyanya pascreen. Kupenda kweAG kunoderedza kupenya kwespecular kuburikidza ne diffuse reflection, zvichiita kuti vafambi vagone kuona zviri mukati mescreen pasi pemamiriro emwenje. Takasangana nezviitiko zvakawanda apo vatengi vakasarudza magirazi egirazi akajairwa, asi mushure mekuiswa, vaisakwanisa kuona zviri mukati zvakajeka masikati - rudzi urwu rwekugadzirisa zvakare runopfuura musiyano wemitengo wekugadzirisa kweAG pachayo.

Zvimwe zvigadzirwa zvepamusoro-soro zvakatotanga kushandisa AI intelligent brightness adjustment function, iyo inoona mamiriro emwenje yakapoteredza munguva chaiyo kuburikidza nema ambient light sensors uye inogadzirisa otomatiki kupenya kwechiso - ichivimbisa kuonekwa uku ichidzivirira kushandiswa kwesimba rakawandisa uye kusvibiswa kwechiedza. Iyi mhinduro yekuchenjera yekugadzirisa nharaunda inomiririra mafambiro ekugadzirwa kwetekinoroji ye lifti display.

Environmental anochinjika parameters:

• Kushanda tembiricha: 0-55 ℃ (inosanganisira ruzhinji rwenzvimbo dzekuisa)
• Hunyoro hwekushanda: 10-90% RH (hapana kunyorovesa)
• Kurapa kwekudzivirira kupenya: AG (Anti-Glare)
• Dziviriro: Sarudza IP level yakakodzera zvichienderana nenzvimbo yekuisa

Fekitori yedu inoita bvunzo dzekuenzanisa zvakatipoteredza pachigadzirwa chega chega chefekitori kuitira kuti ive nechokwadi chekuti kushanda kwenguva refu kwakasimba munzvimbo chaiyo yeelevator. Kana muine zvinodiwa zvakakosha nharaunda yepurojekiti, ndapota inzwa wakasununguka kutaurirana nechikwata chedu cheinjiniya zvakadzama.

 Mibvunzo Inowanzo bvunzwa

Mubvunzo 1: Ndeipi mwero wekupenya unokurudzirwa pakuisa zviratidzo zvedhijitari zve erevheta yemukati?

Kune maerevheta emukati meimba, maniti 350-500 akakwana kuti vaonekwe zviri nyore padaro rekuona riri pasi pemamita maviri. Kana elevheta iri munzvimbo yekuzorora iri pakati pekunze uye ine chiedza chezuva, inokurudzirwa kuti iverengeke zvakanaka kana ichienzaniswa nechiedza chekunze. Kupenya kwakanyanya munzvimbo dzakavharirwa kunogona kukonzera kusagadzikana kwekuona kwevafambi.

Mubvunzo wechipiri: Ndeipi mhinduro yakakodzera kuratidzwa kwekushambadzira kweelevator?

Full HD 1080p (1920x1080) ndiyo nzira inoshanda yekuratidza maekisitorendi. Zvichienderana nehukuru hushoma hwemaekisitorendi uye daro diki rekuona mumaekisitorendi, 4K resolution inopa kuvandudzwa kushoma kunoonekwa ukuwo ichikwidza mitengo yehardware zvakanyanya. China Elevator Association inoisa muganho wepasi pa800x600, asi 1080p inokurudzirwa senzira yekutanga yekutenga zvinhu zvehunyanzvi.

Mubvunzo wechitatu: Sei MTBF ichikosha pakuvimbika kwechiratidziro cheelevator?

MTBF (Nguva Yepakati Pakati Pekukundikana) pamusoro pemaawa 50,000 inoratidza kuvimbika kwemapaneru emhando yeindasitiri akagadzirirwa kushanda nguva dzose munzvimbo dzinogara dzichitenderera. Mapaneru emhando yevatengi anowanzova neMTBF ratings yakaderera zvakanyanya uye haana kugadzirwa kuti agone kutsungirira kushushikana kwemuchina kunobva mukufamba kwemaerevhisi, kukanganiswa nemasuo, uye kudedera kwemotokari. Mapaneru emhando yeindasitiri anovimbisa kushanda kwakasimba kwenguva refu uye anoderedza mari yese yekuva muridzi.

Mubvunzo wechina: Ndedzipi sarudzo dzekubatanidza network dzinodiwa pazviratidziro zveelevator?

Mashaft eelevator anoshanda seFaraday cages, achideredza zvakanyanya masaini asina waya. Nzira inokurudzirwa ndeyekubatanidza zvinhu zvisina basa: Ethernet senzira huru yekubatanidza data yakagadzikana, dual-band WiFi (2.4GHz + 5GHz) senzira yekuchengetedza, uye 4G/LTE module yesarudzo yepamusoro kana mamiriro esignal achibvumira. CMS inofanirwa kutsigira kutamba pasina internet panguva yekukanganiswa kwenetwork.

Mubvunzo 5: Ndezvipi zvitupa zvekuchengetedza zvinodiwa pakuisa zviratidziro zveelevator?

Zviratidziro zveelevator zvinoda girazi re3mm rakapfava kuti zvidzivirire kudonha kwemotokari, zvinhu zvekuchengetedza zvinodzivirira moto zveUL94 V-0, tambo dzekuchengetedza dzechipiri kudzivirira kudonha kwemidziyo, uye kutevedzera mitemo yekuchengetedza elevator yemuno. Misika yakaita seUS, EU, neChina ine zvinodiwa zvechitupa. Matanho aya ekuchengetedza anosungirwa, sezvo zviratidziro zveelevator zvichiiswa munzvimbo dzakavharika dzinosvikika kune vese vafambi kusanganisira vana.