Razvoj telemetrijskog sustava za bolid Formula Student

master's thesis

• Title (english): Development of telemetry system for Formula Student race car
• Author: Leon Malnar
• Mentor: Danijel Pavković (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2020-07-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U svrhu praćenja stanja Formula Student bolida u realnom vremenu bez mogućnosti fizičkog spajanja na njegove komunikacijske kanale tijekom vožnje, razvijen je telemetrijski sustav. Sustav se sastoji od tri glavna dijela. Prvi je M2M (Machine to Machine) uređaj koji prikuplja podatke s vozila i šalje ih prema serveru preko MQTT protokola. Drugi dio je sam server koji prima, obrađuje i sprema podatke. Treći dio je grafičko sučelje koje služi za praćenje podataka.
M2M je uređaj čija je glavna komponenta tiskana pločica. Pločica razvijena u okviru ovog rada ima nekoliko periferija, od kojih su najznačajniji CAN primopredajnici koji služe za primanje podataka s CAN mreže, GNSS prijemnik koji se koristi za dobivanje podatka o lokaciji, modul za mobilnu mrežu koji se koristi za povezivanje na Internet, te sučelje za SD karticu koja se koristi u slučaju slabe veze s mobilnom mrežom. Uz to, konstruirano je prikladno, vodo-nepropusno kućište koje je izrađeno FDM aditivnom tehnologijom.
Server je postavljen preko AWS Educate računa. To je računalo na mreži bazirano na Ubuntu koji koristi InfluxDB kao bazu podataka, Mosquitto kao MQTT broker, i Grafana-u kao grafičko sučelje. Python skripta koja služi kao veza između primljenih poruka i baze podataka se stalno izvodi u pozadini.
Grafana je potpuno kompatibilna s InfluxDB bazom podataka i nikakva dodatna integracija nije bila potrebna. Podaci su sortirani u panele s prikladnom vizualizacijom što korisničku ploču (eng. dashboard) čini preglednom i vizualno privlačnom. Svaki korisnik s dozvolom može pratiti podatke u realnom vremenu ili u definiranom vremenskom rasponu, i može ih preuzeti za daljnju analizu.

Abstract (english)

In order to enable tracking the data of a Formula Student vehicle in real time, without the ability to physically connect to its communication channels, a telemetry system has been developed. The system is composed of three main components. The first one is an M2M (Machine to Machine) device that collects data from the vehicle and sends them to the server through MQTT protocol. The second one is the server itself, which receives, processes and stores that data. The third one is a graphical interface that is used to view the data.
M2M is a device whose main component is a printed circuit board. The board designed in this work has a couple of peripherals, with the most notable ones being CAN transceivers used to receive data from CAN bus, GNSS receiver used to receive location data, cellular network module used to connect to the Internet, and SD card interface that’s used to store the data in case of a bad cellular connection. Also, a suitable, waterproof housing was designed and manufactured with FDM additive technology.
The server is created using AWS educate account. It’s an Ubuntu based cloud computer that uses InfluxDB as database, Mosquitto as MQTT broker, and Grafana as graphical interface. A Python script that’s used as a link between received messages and database is always running in the background.
Grafana has native compatibility with InfluxDB so no additional integration was required. The data is sorted into panels with appropriate visualizations which makes dashboard appealing and organized. Every user with permission can view the data in real-time or in a custom timeframe and can download it for further analysis.

• Keywords: Telemetrija; Formula Student; Vulpes R; M2M; IoT; MQTT; CAN; mobilna mreža; InfluxDB; Grafana; logiranje
• Keywords (english): Telemetry; Formula Student; Vulpes R; M2M; IoT; MQTT; CAN; cellular network; InfluxDB; Grafana; logging
• Language: croatian
• URN:NBN: urn:nbn:hr:235:285665
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-07-07 10:49:52