Model: PDML-4800
Dam safety monitoring instruments
How a dam body moves under load is one of the key measures of its stability. The PDML-4800 automatic laser pendulum reader measures the pendulum wire position on the X and Y axes to 0.01 mm, stores it and sends it to a PC for the dam stability software. The group also includes opening measurement for spillway and intake gates (submerged gates too) and automatic logging from about 1,000 dam-body sensors.
Features
- Contactless laser measurement to 0.01 mm on the X and Y axes
- Works with direct and inverted pendulums; mounts on the existing base in the dam body
- MMC memory, internal clock and data kept through power cuts
- LCD, dust- and water-proof keypad, and a password for settings
- RS-485 Modbus port for data-acquisition networks and central monitoring
- Allowed and critical deflection limits, with automatic alarms, for example during floods and earthquakes
- Gate opening measured over distances up to 3 km
Applications
- Dams and hydrometric stations
- Hydroelectric plants
Installed in
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PDML-4800 laser pendulum reader catalogue
PDML-4800 design goals and general data
PDML-4800 electrical, software and mechanical data
Technical data
| Accuracy | ±0.01 mm (X, Y) |
|---|---|
| Supply | 220 V AC |
| Communication | RS-485 · Modbus |
Related projects
- Laser crydoscope for precise dam-body deflection monitoringManjil · 2005
- Laser crydoscope for dam monitoringAras · 2013
- Opening measurement for 11 dam gates over distances up to 3 km, with instrument testing and calibrationLatian · 2004
- Opening indication for six submerged intake gatesLatian · 2004
- Microprocessor-based spillway gate opening system: supply, installation and commissioningKaraj · 2013
- Automatic data logging from about 1000 dam-body sensorsKaraj