Hi Team,
I would like to get some help regarding the customer request for a microwave radar chip to sense human presence at a distance of roughly 20 to 30 cm.
The customer would need roughly 100k units so I hope you can help with the following information from the customer:
"The idea is to limit the sensing to a region of a persons head in front of the device
that is at a distant of roughly 25 cm
an angular resolution for vital sign detection of roughly <10° would be preferable
further, a distinction between the reflection of vital tissue and static object reflection would be helpful
Other questions:
I would also be interested in clarification of the following 2 aspects (if possible):
1.) is it theoritically feasible to measure the heart rate from a region of a humans face via na mmWave sensor. As far as I understand the TI-examples on the TI-Website on this subject the heart rate is usually measured from microscopic movements of a person's chest (predominantly).
(https://www.ti.com/lit/wp/spry315/spry315.pdf)
2.) How exact can the distance to a face be resolved at a distance of 25cm (since I would expect that multiple echo signals from the irregular surface of the face are received at the sensor). Is my understanding correct that the mmWaveSensor delivers a range mapping of the reflected signals?
Please let me know if you have any questions with the customer.
Regards,
Jonathan Geronga
Texas Instruments Customer Support
