{"id":3987,"date":"2021-12-06T01:34:26","date_gmt":"2021-12-06T01:34:26","guid":{"rendered":"https:\/\/www.ahotech.com\/?page_id=3987"},"modified":"2021-12-06T01:34:27","modified_gmt":"2021-12-06T01:34:27","slug":"intelligent-bronddaeksel-guangzhou-nb-iot-intelligent-kloakdaekselsystem","status":"publish","type":"page","link":"https:\/\/www.ahotech.com\/da\/intelligent-well-cover-guangzhou-nb-iot-intelligent-manhole-cover-system\/","title":{"rendered":"Intelligent br\u00f8ndd\u00e6ksel \u2014 Guangzhou NB-IOT intelligent kloakd\u00e6kselsystem"},"content":{"rendered":"

Intelligente byer er blevet den fjerde b\u00f8lge efter industrialisering, informatisering og elektrificering. Opf\u00f8relsen af intelligente byer er frontlinjen inden for global byudvikling. I dag er mange byr\u00f8r til regnvandsdr\u00e6ning ofte blokeret, hvilket p\u00e5virker dr\u00e6ningen alvorligt og resulterer i hyppig vandophobning p\u00e5 veje, hvilket alvorligt p\u00e5virker folks liv og transport. Derudover er br\u00f8ndd\u00e6ksler blevet stj\u00e5let og beskadiget fra tid til anden i de senere \u00e5r, hvilket nogle gange f\u00f8rer til, at fodg\u00e6ngere falder i kloakken. Og for meget trafik p\u00e5 vejene p\u00e5virker ogs\u00e5 trafiksituationen og folks transport. Derfor er det meget n\u00f8dvendigt at udf\u00f8re systematisk h\u00e5ndtering af alle aspekter af kommunale problemer. Samtidig giver det, hvad ang\u00e5r teknologiudvikling, med fremskridtene inden for intelligent sensorteknologi og tr\u00e5dl\u00f8se sensorer, den hurtige udvikling og implementering af NB-IOT mobilkommunikationsteknologi samt den hurtige popularisering af bredb\u00e5ndsinternet, ogs\u00e5 et solidt teknisk fundament for opf\u00f8relsen af "kommunal forvaltning af intelligente byer".<\/p>\n\n\n\n

\"kombination<\/figure>\n\n\n\n

1 Systemfunktion<\/p>\n\n\n\n

Vi bygger en intelligent kommunal styringsplatform til byens ledere, som kan fjernoverv\u00e5ge status for br\u00f8ndd\u00e6ksler, trafikflow, r\u00f8rledningsblokeringer og andre oplysninger, samtidig med at den kan udsende rettidig alarm, n\u00e5r der opst\u00e5r problemer, og finde mere effektive l\u00f8sninger. Produktet kan ogs\u00e5 udf\u00f8re alle operationer visuelt.<\/p>\n\n\n\n

2 Grundl\u00e6ggende designid\u00e9er<\/p>\n\n\n\n

2.1 Overv\u00e5gning af vandstr\u00f8mningstilstand<\/p>\n\n\n\n

Hver node bruger ultralydsmodulet til at detektere vandstandsh\u00f8jden og sammenligner vandstandsh\u00f8jden mellem de tilst\u00f8dende noder for at bed\u00f8mme, om der er en blokering (hvis forskellen i vandstand mellem de tilst\u00f8dende noder er stor, kan det betragtes som, at dr\u00e6nr\u00f8ret mellem de to noder er blokeret, og blokeringens omfang kan groft bed\u00f8mmes ud fra h\u00f8jdeforskellen). Det skematiske diagram over blokeringsdetektion er vist i figur 1.<\/p>\n\n\n\n

Indsamling af information om vandstanden p\u00e5 hvert tidspunkt bruges til at danne en h\u00f8jdekurve for vandstanden. N\u00e5r vandstanden stiger for hurtigt, udl\u00f8ses alarmen.<\/p>\n\n\n\n

Modulet placeres \u00f8verst i r\u00f8rledningen n\u00e6r br\u00f8nden for at eliminere p\u00e5virkningen fra uj\u00e6vnt terr\u00e6n. Princippet bag ultralydsm\u00e5ling er at m\u00e5le den tid, det tager for lydb\u00f8lgen at reflekteres tilbage fra en forhindring, efter den er affyret, baseret p\u00e5 ultralydb\u00f8lgens kendte udbredelseshastighed i luften, og beregne den faktiske afstand fra affyringspunktet til forhindringen i henhold til tidsforskellen mellem affyring og modtagelse. N\u00e5r vandstanden i tilst\u00f8dende noder er forskellig, kan det fremh\u00e6ves i den \u00f8vre computersoftware for at l\u00f8se problemet hurtigere.<\/p>\n\n\n\n

2.2 Statusdetektion af br\u00f8ndd\u00e6kning<\/p>\n\n\n\n

Gyroskopmodulet bruges til at detektere \u00e6ndringer i akseld\u00e6kslets vinkel for at bed\u00f8mme, om d\u00e6kslet er l\u00f8st eller \u00e5bent uden grund, for at realisere funktionen af tyverisikring og detektering af l\u00f8shed.<\/p>\n\n\n\n

MPU6050 har funktionen til vinkelacceleration og accelerationsdetektion, og pr\u00e6cisionen er meget h\u00f8j. Den kan detektere mikroskopiske vinkel\u00e6ndringer. I2C-kommunikationsprotokollen er meget nem at betjene. Mpu6050 kan fastg\u00f8res vandret til br\u00f8ndd\u00e6kslet. N\u00e5r br\u00f8ndd\u00e6kslet \u00e5bnes, kan modulet detektere \u00e6ndringen i vinkel og give feedback. Hvis br\u00f8ndd\u00e6kslet er l\u00f8st, og n\u00e5r en person eller et k\u00f8ret\u00f8j passerer gennem br\u00f8ndd\u00e6kslet, vil br\u00f8ndd\u00e6kslets vinkel \u00e6ndre sig en smule. Informationen fra MPU6050 kan bruges til at bed\u00f8mme, om br\u00f8ndd\u00e6kslet er l\u00f8st eller ej. Hvis br\u00f8ndd\u00e6kslets h\u00e6ldning er st\u00f8rre end 30\u00b0, vurderes det, at br\u00f8ndd\u00e6kslet er \u00e5bent. Hvis vinklen er -5\u00b0~5\u00b0 med konstant udsving, vurderes det, at det er l\u00f8st.<\/p>\n\n\n\n

2.3 Overv\u00e5gning af overflademilj\u00f8et<\/p>\n\n\n\n

Overv\u00e5g overfladetemperaturen og luftfugtigheden, vurder vejrforholdene og giv given feedback.<\/p>\n\n\n\n

2.3.1 Fugtighedsregistrering<\/p>\n\n\n\n

Ved at installere fugtighedssensoren p\u00e5 den indvendige kant af br\u00f8ndd\u00e6kslet registreres fugtighedsstatus i realtid, og der sendes feedback til det centrale processorsystem for hver node. N\u00e5r fugtigheden er h\u00f8j i regnvejr, eller overfladevand tr\u00e6nger ind i sensoren gennem kanten af br\u00f8ndd\u00e6kslet, og fugtigheden overstiger en bestemt v\u00e6rdi, vil det centrale processorsystem reagere, forbedre kommunikationsfrekvensen med v\u00e6rten og give feedback i realtid, hvilket vil v\u00e6re nyttigt for ledere at beherske mere information i tilf\u00e6lde af en n\u00f8dsituation.<\/p>\n\n\n\n

2.3.2 Temperaturdetektion<\/p>\n\n\n\n

Det er nyttigt for kommunen at montere temperatursensoren under br\u00f8ndd\u00e6kslet for at indsamle og rapportere oplysninger om overfladetemperatur, s\u00e5 den kan f\u00e5 et overblik over temperatursituationen i forskellige dele af byen og tr\u00e6ffe k\u00f8leforanstaltninger i omr\u00e5der med for h\u00f8je temperaturer. (Den \u00f8verste computer kan bruges til at generere temperatur\u00e6ndringskurven og forudsige den fremtidige temperatur)<\/p>\n\n\n\n

Temperatursensoren LM35DZ er anvendt. Chippen er lille og fleksibel i st\u00f8rrelse og har h\u00f8j n\u00f8jagtighed. Dataene kan v\u00e6re n\u00f8jagtige med to decimaler. Chippen kan anvende single-bus-kommunikationstilstand og er nem at betjene.<\/p>\n\n\n\n

2.4 Overv\u00e5gning af trafikflow<\/p>\n\n\n\n

Bildetekteringsmodulet er installeret p\u00e5 br\u00f8ndd\u00e6kslet for at registrere trafikstr\u00f8mmen og sende den til den kommunale forvaltningsafdeling som reference.<\/p>\n\n\n\n

Det er planlagt at bruge en geomagnetisk sensor til at realisere funktionen af k\u00f8ret\u00f8jsflowoverv\u00e5gning. Modulet kan registrere magnetfeltsituationen n\u00f8jagtigt. N\u00e5r der k\u00f8rer k\u00f8ret\u00f8jer forbi, vil det forstyrre magnetfeltet. Hvis modulet registrerer \u00e6ndringer i magnetfeltet, kan det vurdere, om der k\u00f8rer k\u00f8ret\u00f8jer forbi. I \u00f8jeblikket bruges modulet prim\u00e6rt til parkeringspladsdetektering. Modulets vigtigste fordele er som f\u00f8lger:<\/p>\n\n\n\n

(1) Lille og fleksibel st\u00f8rrelse. Modulet kan nemt bruges i produkter;<\/p>\n\n\n\n

(2) H\u00f8j f\u00f8lsomhed. Modulet er meget f\u00f8lsomt over for \u00e6ndringer i jordens magnetfelt og kan registrere k\u00f8ret\u00f8jets bev\u00e6gelse ud over 3 m;<\/p>\n\n\n\n

(3) Ultralavt str\u00f8mforbrug. Modulets gennemsnitlige driftsstr\u00f8m er mindre end 200 \u03bcA. Og dens driftssp\u00e6nding kan v\u00e6re s\u00e5 lav som 2,0 V, hvilket kan maksimere batteriets levetid (to nr. 5 Nanfu-batterier kan fungere i mere end 3 m\u00e5neder, professionelle industribatterier med stor kapacitet kan fungere i mere end 5 \u00e5r, og batterier med superstor kapacitet kan endda fungere i mere end 10 \u00e5r, hvilket afh\u00e6nger af batteriets levetid).<\/p>\n\n\n\n

(4) Enkel og brugervenlig. Modulet har en switch-interface og en UART seriel port. Switch-interfacet kan give h\u00f8jt og lavt niveau output. H\u00f8jt niveau betyder, at der er en bil, lavt niveau betyder, at der ikke er nogen bil; UART seriel port giver timing statusrapport, parameterindstilling og andre funktioner.<\/p>\n\n\n\n

2.5 Dataoverf\u00f8rsel<\/p>\n\n\n\n

2.5.2 NB-IOT-del<\/p>\n\n\n\n

Nb-IOT-delen bruges til at sende information behandlet af den centrale controller (Beaglebone) til internettet. Brug af NB-IOT til at overf\u00f8re data har f\u00f8lgende fordele:<\/p>\n\n\n\n

(1) NB-IOT-signalet d\u00e6kker et bredt omr\u00e5de, hvilket kan sikre en problemfri overf\u00f8rsel af alle data til internettet;<\/p>\n\n\n\n

(2) Netv\u00e6rkshastigheden kan n\u00e5 op p\u00e5 omkring 20 K pr. sekund, hvilket er nok til at overf\u00f8re data;<\/p>\n\n\n\n

(3) Sammenlignet med SMS er omkostningerne ved at bruge NB-IOT til dataoverf\u00f8rsel lavere;<\/p>\n\n\n\n

(4) Det er nemt at bruge seriel kommunikationsprotokol<\/p>\n\n\n\n

2.5.3 Serverdel<\/p>\n\n\n\n

Da den IP-adresse, der bruges af NB-IOT-modulet, tildeles tilf\u00e6ldigt, skal brugerne ogs\u00e5 logge ind p\u00e5 forskellige IP-enheder, s\u00e5 det er vanskeligt at sende de indsamlede oplysninger direkte til brugernes enheder. Derfor er det besluttet at bruge serverplatformen som dataoverf\u00f8rselsstation. Alle de indsamlede oplysninger sendes til serveren til midlertidig lagring via NB-IOT, og brugeren bruger den \u00f8vre computer til at f\u00e5 adgang til serveren for at hente dataene.<\/p>\n\n\n\n

2.7 Intelligent kontrolgr\u00e6nseflade<\/p>\n\n\n\n

Den \u00f8vre computer henter dataene fra serverplatformen og pr\u00e6senterer dem for brugeren i form af visualisering. Gennem den visuelle brugerflade kan brugeren intuitivt forst\u00e5 placeringsforholdet mellem hver node og bekvemt f\u00e5 information om vandstand, temperatur, fugtighed, br\u00f8ndd\u00e6kningsstatus, trafikflow og andre oplysninger for hver node. N\u00e5r der er forskellige unormale forhold, s\u00e5som blokering, hurtig stigning i vandstanden eller unormal br\u00f8ndd\u00e6kningsstatus, kan brugeren rettidigt give feedback p\u00e5 status- og placeringsoplysningerne.<\/p>\n\n\n\n

Den \u00f8verste computer bruger API'en fra Baidu Map til at vise kortet over det overv\u00e5gede omr\u00e5de p\u00e5 websiden, og hver node er markeret p\u00e5 kortet, hvilket er meget tydeligt. Ved hj\u00e6lp af Django-arkitekturen i Python og HTML, JS og andre sprog pr\u00e6senteres de data, der indsamles af hver node, i form af et diagram p\u00e5 websiden, og du kan kontrollere det ved at klikke p\u00e5 tagget. Samtidig kan alarmfunktionen informere brugeren om problemer i tide.<\/p>\n\n\n\n

  1. Overordnet blokdiagram<\/li><\/ol>\n\n\n\n

    Det overordnede blokdiagram for systemet er vist i figur 4, og f\u00f8lgende funktioner er endeligt realiseret:<\/p>\n\n\n\n

    (1) Indbrudsalarm, brug netv\u00e6rket til at informere kommunale afdelinger for at l\u00f8se problemet med manglende br\u00f8ndd\u00e6kning i tide.<\/p>\n\n\n\n

    (2) L\u00f8s alarm, eliminer den potentielle sikkerhedsrisiko for\u00e5rsaget af skader p\u00e5 br\u00f8ndd\u00e6ksel for fodg\u00e6ngere.<\/p>\n\n\n\n

    (3) Alarm for blokering af r\u00f8rledninger, der vises visuelt i den brugerflade, for at hj\u00e6lpe reng\u00f8ringsafdelingen med at rydde op i tide, eliminere skjulte farer og forhindre forekomsten af vandm\u00e6tning i byomr\u00e5der.<\/p>\n\n\n\n

    (4) M\u00e5l jordtemperaturen og send dataene tilbage.<\/p>\n\n\n\n

    (5) Registrer vandstanden og send dataene tilbage.<\/p>\n\n\n\n

    (6) Registrer jordens fugtighed og \u00f8g transmissionsfrekvensen, n\u00e5r fugtigheden stiger, hvilket er nyttigt til varsling om kraftig regn.<\/p>\n\n\n\n

    (7) Registrer k\u00f8ret\u00f8jsflow, send data tilbage i realtid og hj\u00e6lp til trafikstyring.<\/p>\n\n\n\n

    (8) Vis de returnerede data i visualiseringsgr\u00e6nsefladen, og udf\u00f8r den tilsvarende behandling og klassificering, hvilket giver et praktisk driftsmilj\u00f8 for kommunale afdelinger.<\/p>\n\n\n\n

    (9) Opret databasen til at gemme de returnerede data til nem brug og analyse.<\/p>\n\n\n\n

    4 Afsluttende bem\u00e6rkninger<\/p>\n\n\n\n

    Systemet sigter mod at opbygge en intelligent kommunal forvaltningsplatform for byen for at give offentligheden et mere bekvemt og sikkert liv. Ved at bruge br\u00f8ndd\u00e6kslet som et regionalt konvergenspunkt, er centraliseret transmission og intelligent behandling af de indsamlede data en v\u00e6sentlig innovation i projektet. Under hensyntagen til dr\u00e6ning, trafik, trafiksikkerhed og andre kommunale oplysninger er opbygningen af en smart by et h\u00f8jdepunkt i projektet. Selvom der stadig er nogle problemer med str\u00f8mforsyning og antenner, er de ikke sv\u00e6re for ingeni\u00f8rer at l\u00f8se, hvilket kan give en st\u00f8rre garanti for folks sikkerhed og livskvalitet.<\/p>","protected":false},"excerpt":{"rendered":"

    Intelligent city has become the fourth wave after industrialization, informatization and electrification. The construction of intelligent city is the frontier trend of global urban development. Nowadays, many urban pipes for rainwater drainage are often blocked, which seriously affected drainage, resulting in frequent water accumulation on roads, so that it seriously affected people’s life and travel. 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