Design of Wireless Sensing Device for Adaptive Life Signs in Deformation

A deformation-adaptive wireless vital signs sensing device has been designed to ensure the safety of firefighters during fire and rescue operations and address the compatibility issues between the protection and comfort of existing emergency rescue personal protective equipment. Based on a flexible sensor deformation adaptation model, the device employs photoplethysmography to measure the firefighter’s heart rate, blood pressure, and respiratory rate. It gauges skin temperature by analyzing changes in the resistance value of thermal resistors. Calibration experiments were conducted in five different activity intensity settings to assess the relationship between sweat volume and skin resistance values, aiming to evaluate the perspiration status of firefighters. For data transmission, the device utilizes the low-power Bluetooth 5.2 protocol to ensure efficient and stable information transfer. Testing has confirmed that the device developed in this study can monitor the vital signs of firefighters at disaster scenes in real-time and support the effective transmission of data to the command center at the rear. This facilitates commanders and firefighters in promptly understanding the operational status, playing a crucial role in ensuring the safety of firefighters and assisting command personnel in making scientific and reasonable decisions.