Geokon 6150F, Инструкция по эксплуатации, Страница: 9 / 32

MODEL 6150F MEMS DIGITAL ADDRESSABLE IN-PLACE INCLINOMETER | INTRODUCTION | 1
1. INTRODUCTION
The
GEOKON
Model 6150F MEMS Digital Addressable In-Place Inclinometer
system enables long-term monitoring of deformations in structures such as
dams, embankments, foundation walls, and similar applications. The basic
principle of operation is the use of tilt sensors to make accurate measurement of
inclination, over segments of a borehole, which is drilled into the structure being
studied. The instrument is designed to be installed in standard grooved
inclinometer casing, which is installed in the borehole. Constant monitoring by
the instrument allows for very precise measurement of changes in the borehole
profile. Each tilt sensor is individually serialized and calibrated. A calibration
sheet for each sensor is provided, showing the relationship between sensor
output and inclination.
Each tilt sensor is comprised of two addressable Micro-Electro-Mechanical
Systems (MEMS) devices inside a sealed stainless steel housing. The devices
measure the A and B axes of the borehole. Each sensor also contains a
thermistor for reading temperatures.
The tilt sensors are connected to each other using four-wire bus cable. Each
sensor has a length of this cable exiting both the top and bottom of the housing.
A male connector is attached to the cable exiting the top of the sensor and a
female connector is attached to the cable exiting the bottom of the sensor.
The uppermost sensor of the string connects to a customer-specified terminator
for attaching to the chosen readout (PC, datalogger, SCADA system, etc.).
The inclinometer system uses stainless steel tubing to mechanically connect the
sensors, as well as to fix them at the customer-designated intervals. The tilt
sensor housing has a wheel assembly and universal joint on its upper end. This
centralizes the sensors in the casing, allows unimpeded relative movement of
the spacer tubing, and accommodates any spiraling of the casing. The entire
string is normally supported from the top of the casing by a suspension bracket.
FIGURE 1: Model 6150F Installed