Riset lan desain sistem anti-nyolong kendharaan cerdas adhedhasar NB-IOT

Roadragon has designed a vehicle anti-theft system based on NB-IOT, which mainly uses NB-IOT wireless communication technology, GPS and Beidou dual-mode positioning technology to address the current public security problems of frequent theft of bicycles and electric motorcycles. The overall solution for the investigation after the case is reached.

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With the promotion of the concept of low-carbon travel in recent years, the use of high-end bicycles, electric vehicles, and motorcycles has increased, and the subsequent stolen and difficult-to-track vehicles have become a major problem that plagues many car owners. However, the common vehicle anti-theft solutions on the market still have many defects[1]:

(1) Solusi 2G: 2G nyuda kapasitas lan mundur saka jaringan, kanthi jangkoan sing lemah, sinyal sing ora apik, ora ana sinyal ing parkiran lemah, lan konsumsi daya dhuwur.

(2) Larutan RFID: Kendharaan umume adoh saka sepuluh meter saka tiwane pamaca RFID, sinyale ringkih banget, data ora bisa diwaca, lan terminale dipedhot; kendharaan ora bisa ditemokake utawa dilacak ing kabupaten utawa deso, lan wilayah kutha diwatesi mung nyebrang kunci; Pamaca tiang dalan kudu dipriksa lan dirawat kanthi asring.

Ngarahake kekurangan skema loro ing ndhuwur, makalah iki ngrancang sistem anti-nyolong kendharaan cerdas adhedhasar NB-IOT, sing duwe kaluwihan jangkoan, koneksi gedhe, lan konsumsi daya sithik.

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1 Arsitektur sistem

The intelligent anti-theft system based on NB-IOT mainly includes three parts: equipment terminal , background processing system and user terminal. The system terminal sensor can be connected to the operator’s IO domain intranet through NB-IOT. The background application system supports the docking of public security network interactive case data. The user can monitor the vehicle through the mobile phone, and the background management system can maintain the overall user data. Management and monitoring.

2 Rencana umume

This system transfers the GPS&Beidou satellite dual-mode positioning data and the state value of the vibration sensor to the single-chip STM32, which is then uploaded to the core network through the NB-IOT communication module, and transmitted to the cloud platform through the HTTPS protocol, and then through the cloud transparent transmission function, It is forwarded to the cloud server, then stored to MySQL and transmitted to the APP on the mobile phone.

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3 Desain perangkat keras sistem

Peralatan perangkat keras sistem iki utamane kalebu modul deteksi status kendaraan, modul posisi dual-mode GPS & Beidou lan modul komunikasi NB-IOT, modul kontrol mikrokomputer chip tunggal STM32. Kerangka perangkat keras sistem ditampilake ing Gambar 2. Fungsi modul deteksi negara getaran yaiku kanggo ndeteksi kahanan kendharaan lan apa ana gerakan kendaraan. Fungsi modul posisi dual-mode satelit GPS & Beidou yaiku kanggo nemokake posisi kendharaan, entuk nilai lintang lan garis bujur, lan kirim menyang STM32 siji-chip. NB

The function of the IOT communication module is to send the vehicle status collected by the sensors and the positioning information resolved by the main control chip to the IoT cloud platform. As the main control chip, the STM32 microcontroller is the core part of the system hardware. Its function is to implement the underlying functions of the system through code, such as obtaining the longitude and latitude data of the GPS& Beidou satellite dual-mode positioning through the serial port interrupt and detecting whether the vibration sensor inputs a high level , Pack the acquired data and upload it to the cloud server through the NB-IOT module. At the same time, it also receives the instructions issued by the mobile phone APP to determine whether the anti-theft mode should be turned on.

3.3 Analisis asil eksperimen

Bisa dingerteni saka Gambar 2 yen ing macem-macem hyperparameter Agent1 ~ 4, aliran kendaraan ing fase Agent1, Ag ent2, lan Agent3 dikendhaleni 600 veh / h, dene aliran kendaraan ing phase Agent4 dikendhaleni 500- 600 kendaraan / jam. Setelan iki Efektif bisa njamin macem-macem lan acak skenario tes. Antarane, status sinyal ing jaringan lalu lintas agen bisa diwakili kanthi dawa antrian tunggu ing prapatan; fungsi tumindak kanggo nggedhekake akumulasi angka hadiah bisa diwakili dening nilai absolut saka prabédan antara dawa antrian sisih wétan-kulon lan sisih lor-kidul. Asil eksperimen nuduhake yen, dibandhingake karo nilai fungsi jaringan saraf saka Agent1 lan Agent2, Ag

Kinerja ent3 lan Agent4 ing kontrol sinyal lalu lintas kutha luwih stabil, lan kacepetan rata-rata Agent4 luwih gedhe lan rata-rata dawa antrian tunggu luwih cilik, sing luwih apik tinimbang Agent1, Agent2, lan Agent3.

Kesimpulan

Adhedhasar sistem SCATS, negara kita ngusulake algoritma pembelajaran tulangan jero kanggo agen lalu lintas (Agen) adhedhasar jaringan kontrol sinyal lalu lintas kompleks kutha kanggo nglumpukake, model lan nganalisa data aliran lalu lintas ing wektu sing beda-beda, kalebu dununge kendharaan kutha. , Kecepatan lalu lintas global, rata-rata dawa antrian tunggu lan simulasi data liyane, asil kontrol sinyal lalu lintas kutha sing dipikolehi luwih stabil. Liwat ngoptimalake paramèter wektu sing beda lan pilihan skema rasio huruf ijo, bisa nyukupi kabutuhan kontrol sinyal lalu lintas prapatan ing wektu sing beda-beda.

4 Desain piranti lunak sistem

Desain piranti lunak sistem iki kalebu modul kontrol STM32 [2], modul posisi dual-mode GPS & Beidou, modul komunikasi data NB-IOT. Kaya sing dituduhake ing diagram alur piranti lunak 3, sistem terminal piranti diaktifake, sirkuit perangkat keras periferal lan modul komunikasi NB-IOT diinisialisasi, banjur disambungake karo platform cloud IoT. Yen sambungan ora sukses, enteni sawetara detik sadurunge nyambung maneh. Interval pangiriman 5 detik. Yen interval wektu luwih saka 5 detik, data posisi bakal dipikolehi, informasi posisi bakal dikirim menyang platform cloud, lan konter bakal dibersihake, mula data bali platform bakal dipikolehi, yen data bali ora kosong, data deteksi bakal dileksanakake, banjur gelung bakal dilebokake Ing awak, terus entuk lan ngirim informasi lokasi.

4.1 Desain perangkat lunak modul kontrol STM32

Modul kontrol STM32 nggunakake fungsi inisialisasi kanggo nyetel prioritas prioritas lan prioritas respons port serial lan pin interrupt external. Port serial tanggung jawab nampa data GPS lan ngirim lan nampa data saka modul NB-IOT, lan pin interupsi eksternal ndeteksi input level sensor kejut.

4.2 Desain perangkat lunak modul posisi GPS & Beidou dual-mode

Setel dhisik modul posisi Beidou menyang mode pangukuran, banjur entuk data posisi Beidou, ngetung sudut sumbu Z, banjur atur modul posisi Beidou menyang mode siyaga, lan bali menyang posisi ngganggu fungsi utama. Aktifake port serial sing nampa terminal lan atur prioritas gangguan. Fungsi pemrosesan port serial ngganggu data sing dikirim nganggo modul posisi GPS & Beidou mode loro lan nganalisa nilai lintang lan garis bujur sing dibutuhake.

4.3 Desain perangkat lunak modul komunikasi data NB-IOT

Modul komunikasi NB-IOT [4] nggunakake printah AT kanggo dakwaan, sub-fungsi inisialisasi modul komunikasi ngatur parameter NB-IOT, nyetel NB-IOT menyang mode CMD, lan nyetel alamat IP lan nomer port awan transmisi transparan. Data serial sing ditampa NB-IOT STM32 diunggah menyang server cloud liwat protokol HTTPS. Transmisi data yaiku ngirim pesen kanthi format heksadesimal, lan nampa lan nglakokake instruksi liwat fungsi pangolahan port serial kanggo entuk resepsi data.

4.4 Desain terminal pangguna

Kerangka umum terminal pangguna ditampilake ing Gambar 5. Sisih pangguna sistem iki nggunakake alat pangembang web WeChat kanggo ngembangake applet WeChat. Bagian piranti lunak terminal pangguna utamane nyakup informasi pangguna pangguna, ngakses peralatan pangguna, entuk data peralatan pangguna, lan nampilake data peralatan pangguna Ngenteni patang bagean.

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5 Tes lan analisis sistem

Sistem iki didhukung dening batere lithium lan duwe voltase catu daya eksternal: 12V-40V, suhu kerja: 40 ° C ~ 70 ° C, asor: <95% RH, pita frekuensi dhukungan LTE-FDD B3 / B5 / B8, LTE-M1, LTE-NB1.

5.1 Tes fungsi piranti lunak sistem

Liwat pangukuran lapangan, nalika kendharaan pindhah, weker dipicu lan informasi alarm diunggah menyang méga. Sistem kasebut bisa nemokake informasi kendaraan kanthi nyata, kayata ing Gambar 6; nalika kendaraan kedher, bakal menehi weker geter kendaraan sing ora normal, kaya sing ditampilake ing Gambar 7; lan ponsel bisa ndeleng informasi alarm sing cocog.

6 Kesimpulan

The intelligent vehicle anti-theft system designed in this paper adopts NB-IOT technology to realize wireless data transmission, which can ensure the speed and quality of data transmission, and has a wider coverage; it adopts GPS & Beidou dual-mode positioning system, which can still be used after the vehicle is stolen. See the real-time location of the vehicle from the mobile terminal, so as to quickly find the stolen vehicle, which provides an effective means for prevention before the case and investigation after the case.


Wektu kiriman: Sep-18-2020