Dear Community
I have a requirement to measure the relative altitude between two points in space. a module containing BMP390 sensor will be deployed at a certain height. the module will communicate the absolute pressure measured to a handheld device at ground level using wireless communication. the handheld device will have a BMP390 sensor built-in which will measure the barometric pressure at ground level. the handheld device will calculate the relative altitude between the two devices using the difference in pressure reported by the two devices. the absolute accuracy of BMP390 sensor in altitude is approximately 4m whereas the relative accuracy in altitude is approximately 250mm.
I need my measurement accuracy to be +/-250mm. is there a way I can marry the two sensors and offset the absolute accuracy error?
there will be multiple devices deployed at the same time. an operator walking on the ground with the handheld device should be able to estimate the height of each of them. this means maintaining a table of calibration offset for each sensor is not very user-friendly.
the maximum height I need to measure is 30m.
pls advice me on what I can do to accomplish this?
Mahi
