Components

Bed Sensor Panel

The BSP, 22” square and 1” thick, consists of the UWB motion sensor, four transmitting and receiving antenna arrays and a communication module. The motion sensor generates extremely low power (~50 nanowatt) and very short duration (~2 nanoseconds) pulses that are sent toward the patient’s body at a radio frequency of four gigahertz via transmitting antenna arrays.

The pulses, which are about 20 million times weaker than those produced by a common cell phone or baby monitor, penetrate the mattress, clothing and body tissues and reflect off the moving lung and heart surfaces.

The reflected signal, containing the heart rate and respiration rate data, undergoes a sophisticated electronic filtering using embedded digital signal processing algorithms designed to separate these two signals and filter out the ambient electronic noise. The filtered signals are then digitally processed and wirelessly transmitted to the closest RBS.

The BSP is installed under the patient's mattress in the head portion of the bed frame directly under the patient’s upper torso. The BSP transmits pulses only when the weight of the patient’s body is detected by the load cells installed inside the BSP enclosure.