 |
 |
 |
| |
A liquid-filled electrolytic transducer comprises the sensing element of the digital tiltmeter.
The biaxial transducer is excited and read by stable, low-noise electronics. The clinometer incorporates
a BL1510 that performs A/D conversion, processes the analog data, provides digital I/O, and stores
calibration constants in non-volatile memory. Resolution is better than 0.01 degree.
The Z-World BL1510 |
|
 |
 |
 |
| Shakin' All Over |
| Product: BL1500 Micro-G2 |
Geodetic surveys are often used to determine tilt and movement of the earth's surface. A method of
surveying is to collect tilt data through a network of GPS (Global Positioning System) antennas. The
system incorporates tilt-meters (clinometers) placed at the top of towers. A tower shifts as the ground
shifts. Tilt caused by foundation settlement, earthquake, vehicle collision, vandalism, or wind loading
results in a displacement from a surveyed position. For instance, one degree of tilt of a 4-meter tower
would produce a displacement of 7 centimeters. A company designed a tiltmeter, based on a Z-World controller,
that is used in a GPS geodetic array network in Japan. The network detects crustal strain in the Japanese
island arc system.
Control System Requirements:
- Interface with a GPS module
- Analog to digital conversion of tilt information
- Provide tilt data linearization
- Embed with other electronics in a NEMA 4X box
To satisy the requirements of this system, developers combined Z-World's Dynamic C® software
development system with the BL1500 SBC. A biaxial tiltmeter is mounted to permanent GPS towers, and
the measured tilt angle is sent directly to a GPS receiver. Data parsed to compute the ground location
at the base of the tower with respect to the antenna position at the top. A key component of each are
digital tiltmeter is the Z-World BL1510 SBC.
The BL1510 performs A/D conversion, preprocesses the tilt data and provides digital communication
between the tiltmeter and the GPS receiver.
Why Z-World?
- Fast development because of integrated tilt data preprocessor, I/O, serial communication, and A/D
on one board.
- The BL1510 form factor fit nicely within a specific NEMA enclosure.
- Cost-effective solution with tested software development system.
|
