Development of a mid-infrared sensor system for early fire identification in cotton harvesting operations.
Analyst
; 148(1): 74-84, 2022 Dec 20.
Article
em En
| MEDLINE
| ID: mdl-36444614
ABSTRACT
To realize early fire identification in cotton harvesting operations, a mid-infrared carbon monoxide (CO) sensor system was developed. To match the broadband light source with a 15° divergence angle, a multipass gas cell (MPGC) with an effective path length of 180 cm was designed to improve sensor sensitivity, leading to a limit of detection (LoD) of 0.83 parts-per-million by volume (ppmv). A damping module with springs at the bottom and front/back sides was fabricated, which can effectively reduce the vibration intensity by >80%. The sensor system can operate normally from -40 °C to 85 °C by stabilizing the temperature of the optical module through heating or cooling as well as using automotive electronic components. An adaptive early fire identification algorithm based on a dual-parameter threshold alarming method was proposed to avoid false and missing alarms. Field deployments on a harvester verified the good practicability of the sensor system.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Monóxido de Carbono
/
Temperatura Baixa
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article