V1.1
MEMS Digital Portable Horizontal Inclinometer
09/02/2022
6
The
Geosense®
Digital Horizontal Inclinometer Probe houses a pair of extremely
sensitive Micro Electro-Mechanical System (MEMS)
Tilt Sensors
. In the Horizontal
probe, the ‘A’ axis is mounted with its ‘Null’ or ‘Zero’ output at 0
o
degrees from
horizontal. The two sensors are mounted orthogonally so that they can measure the
orientation of the probe along its length and the ’Roll’ of the probe about its axis,
simultaneously. The former is the primary measurement and referred to as the ‘A’
axis. The other axis is included for installation integrity purposes only and does not
form part of the data calculations. It is referred to as the ‘B’ axis (see sketch).
The probe is attached to a highly robust and flexible support / signal cable that is, in
turn, connected to a portable cable reel. The cable reel includes a Bluetooth
communication module and a re-chargeable battery power supply. The cable is
fitted with ‘crimped’ cable markers that securely identify 0.5 metre (or 2ft) intervals
along its length.
The Cable Reel Bluetooth module is used to connect to an
Android Smart Device
(ASD) or Ruggedized Android Mobile Phone
to the probe. The specially
dedicated horizontal Inclinometer software on the ASD first connects to the reel
modules and then to the probe at the end of the cable. Once connected the
ASD
displays the inclination of the probe in mm.
The displayed values represent the value of ‘L Sin θ’ (Figure 2: L Sin θ and roll
planes of measurement) in the ‘A’ direction and Degrees of ‘Roll’ in the ‘B’ direction.
Figure 2: L Sin θ and roll planes of measurement
