Prototip brezžičnega vgradnega cestno-vremenskega senzorja za globinsko merjenje temperature

DEBEVC, ŽIGA (author), Pustišek, Matevž (mentor)

Cestne službe za upravljanje prometa in sprejemanje odločitev o preventivnem posipavanju za pomoč pri odločanju uporabljajo cestno-vremenske informacijske sisteme (CVIS). Podatke o stanju ceste in podatke za napovedovanje stanja CVIS sistemi med drugim pridobivajo iz cestno-vremenskih (CV) postaj. V primeru okvare katerega izmed senzorjev na CV postaji se pojavi časovna vrzel v zbiranju podatkov, kar vpliva na zmožnost napovedovanja stanja cestišča. V okviru diplomskega dela je bil razvit prototip začasnega vgradnega cestno vremenskega senzorja (CVS) za merjenje temperature cestišča na treh globinah (0 cm, 5 cm in 30 cm). Prototip uporablja ESP32 razvojno ploščico, digitalne temperaturne senzorje DS18B20 in podatke brezžično pošilja drugemu, sprejemnemu ESP32 s protokolom ESP-NOW. Sprejemni ESP32 podatke posreduje na Raspberry Pi 4, kjer se lokalno shranijo. Rezultati primerjave meritev prototipnega CVS z referenčnim senzorjem Lufft IRS31Pro-UMB so pokazali, da prototip na globinah 5 cm in 30 cm zagotavlja zadostno točnost meritev, ki po zahtevah vzdrževalca CVIS znaša ±0,5 °C glede na referenčno vrednost senzorja IRS31Pro-UMB. Analiza porabe energije je potrdila, da prototip z izbranimi baterijami lahko deluje vsaj 6 dni. Prototip omogoča enostavno namestitev in pošilja podatke preko brezžične komunikacije, kar ga naredi primernega za uporabo kot začasna rešitev v primeru okvare obstoječih CV postaj.

• Language: Slovenian
• Keywords: Cestno-vremenski informacijski sistem, cestno-vremenska postaja, začasni vgradni senzor, merjenje temperature cestišča, ESP32, ESP-NOW
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2024
• PID: 20.500.12556/RUL-161616
• COBISS.SI-ID: 207655171
• Publication date in RUL: 12.09.2024

Secondary language

• Language: English
• Title: Prototype of a Wireless In-Road Weather Sensor for Deep Temperature Measurement

Abstract

Road weather information systems (RWIS) are used by road services for traffic management and decision-making regarding preventive road treatment. RWIS systems obtain data on road conditions and forecasting data from various sources, including road weather stations (RWS). In the event of a sensor failure at an RWS, a gap in data collection occurs, which affects the accuracy of road condition forecasts. As part of this thesis, a prototype temporary embedded road weather sensor (RWS) was developed to measure road temperature at three depths (0 cm, 5 cm, and 30 cm). The prototype utilizes an ESP32 development board, DS18B20 digital temperature sensors, and transmits data wirelessly to a receiving ESP32 using the ESP-NOW protocol. The receiving ESP32 then forwards the data to a Raspberry Pi 4 for local storage. The results of the comparison between the prototype RWS and the reference Lufft IRS31Pro- UMB sensor showed that the prototype provides sufficient measurement accuracy at depths of 5 cm and 30 cm, meeting the CVIS maintenance requirements of ±0.5 °C compared to the reference value of the IRS31Pro-UMB sensor. The energy consumption analysis confirmed that the prototype, with the selected batteries, can operate for at least 6 days. The prototype allows for easy installation and transmits data wirelessly, making it suitable as a temporary solution in the event of a failure of existing RWS stations.

• Keywords: Road weather information system, road weather station, temporary embedded sensor, road surface temperature measurement, ESP32, ESP-NOW