Partner to Develop a “Fit and Forget” Wireless enabled CO2 sensor
The remote world of the IoT and building management systems (BMS) involves the connectivity of autonomous devices which require little or no maintenance – hence the term “Fit and Forget”. These “lonely” devices often consist of sensor/actuator functions which need power. The use of replaceable batteries or the provision of mains power is often not ideal due to location, cost and increasingly, user preference. To address this market need GSS, Sharp and the University of the West of Scotland (UWS) partnered to develop a self-powered wireless enabled CO2 sensor unit for environment monitoring, using Sharp’s energy harvesting technology. The development program is being supported by an Innovate UK grant.
Development Objective and Components
The objective was to develop an autonomous wireless CO2 sensing solution with integrated temperature, humidity and light measurements. The required platform had to self-power using energy harvesting techniques, and needed to perform at light levels down to 200 lux as is typically found in buildings, factories and homes. To support this requirement, the CO2 sensor node had to consume a miserly amount of power!
The Prototype System and result overview.
The prototype consists of the Sharp novel energy harvester, a charge management interface module, the GSS SmartIR CO2 sensor and a low power MCU/wireless module housed in a custom enclosure. The interface module manages the average and peak load power requirements of the storage element which can be either a rechargeable Li-ion battery or supercapacitor. The MCU module controls the various sensors and minimises system quiescent current. For this prototype activity, a proprietary wireless interface operating at 868Mhz was used. However the energy harvester powers supply module is capable of supporting state-of-the-art low power wireless formats such as LoRA, BLE, Zigbee etc. The energy harvesting system developed has proven that “Fit and Forget” self-powered, perpetual operation is achievable with the GSS CozIR® CO2 sensor at less than 200 lux.
For more information on our technology, and specifically our newly released upgrade of the CozIR®, the CozIR®LP – please contact firstname.lastname@example.org.
For more information on the PV Energy Harvester system, please contact Sharp’s spin-out “Lightricity” at: email@example.com or visit: https://lightricity.co.uk/