Smart Fall Detection and Personal Safety

A radar sensor transmits a low power radio signal across the room and measures what comes back. Anything that moves alters the reflected signal, and the sensor uses those changes to build a picture of where a person is, how tall they are relative to the floor, and how quickly they are moving.

A fall produces a distinctive pattern: a rapid downward change in height followed by the person remaining at floor level. The sensor compares what it sees against that signature rather than reacting to any single movement, which is how it distinguishes a fall from someone sitting down quickly, bending to pick something up, or lying down on a bed.

Most units also detect the absence of movement. If someone has been motionless on the floor for longer than a set period, the sensor escalates even if the fall itself was not cleanly captured. Because radar reads movement rather than light, it works in complete darkness, through steam and in a bathroom, which is where a high proportion of falls happen and where other detection methods are least usable.

Radar sensors produce no image, no video and no audio. The device processes reflected radio signals locally and transmits a status, such as presence detected, fall detected or no movement, rather than anything that could identify a person or show what they were doing. This is the main reason radar has replaced cameras in care settings. Bedrooms and bathrooms are precisely the rooms where falls occur and precisely the rooms where camera monitoring is unacceptable, both to residents and under data protection law. Radar lets you monitor those spaces without the intrusion.

It is still good practice to inform residents, their families and staff that detection is in place, and to record the purpose and retention of the data in your privacy notice. The technology removes the privacy objection, but not the duty to be open about it.