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Submit, view and vote on ideas or requests
To submit support ticket, visit https://xyleminc.atlassian.net/servicedesk/customer/portal/82
Futhermore if this marker is (un)limited in power available, given it a large li-ion battery, then its possible we could combat the attenuation of the 2x 90° bends in the path between an average hydrant and ball by massively ramping up the ping power wrt. what the SB can output (limited by small battery). If we could collect all the required location data using only hydrants, we could significantly reduce the client potholes required.
Building on this, if the 40KHz-80KHz ultrasonic band is the best channel for transmission as suggested by US20110103189A1 [para 27] (Paulson et al.) we could consider a noise maker that pings in this band. Given that the SB samples at 44Ksps is cannot accurately record this sound for post processing.
1.The SB sample rate AND recording rate could either be increased to 96Ksps. This is the simplest method to capture a high frequency marker. The flash memory consumes the most power of all functions on the SB so this may significantly affect run time.
2.The SB could sample at 96Ksps perform the ToF estimation in DSP on-board and record the ToF, then downsample and record at 44Ksps. This will also have an affect on power consumption as the MCU will not be able to sleep as much but it may be better than option 1.