Tiltmeter

Devices

According to your needs we develop different versions of tiltmeters for you. All tiltmeters are characterised by their high resolution better than 1 nrad or 0.2 mseca – and their low power consumption.

2-K High Resolution Tiltmeter (HRTM)

1-K Miniature Tiltmeter

Borehole Tiltmeter

2-Component Platform Tiltmeter

Test of resolution

Signal source: A person in the first floor of a building moves back and forth in a room. The sensor was installed in the cellar below.

Result: A 70 nrad input signal is clearly resolved with high signal-to-noise ratio.

High Resolution 1-K Platform Tiltmeter

The tiltmeter was used at the Geodetic Base Station Wettzell in SE Germany. In April 2000 a large ring laser has been installed there to observe the rotation of the earth at high resolution. It was necessary to monitor the tilt of the base of the system with extremely high accuracy (in the subnanorad range).

Commercially available borehole tiltmeters have sufficient resolution (of about 1 nrad) – however, due to the large size of those instruments with a length of the order of 1 m such borehole tiltmeters could not be used. Another constraint was a very low power consumption of the tilt sensors, because any temperature change could interfere with the ring laser measurements.

For this purpose a tiltmeter was developed in accordance to the key data probably the tiltmeter with the highest resolution throughout the world at the moment.

Current data you will find here: www.wettzell.ifag.de

Comparative measurements with Askania Borehole Tiltmeter

Tides of the solid earth, first results at BFO: Traces 1 and 3 (from above): LGM Tiltmeter; traces 2 and 4: Askania Borehole Tiltmeter

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Cooperation partners

• Institute of Geodesy / Leibniz Universität Hannover – Schwerefeldforschung (more...)
• Geodätisches Observatorium Wettzell – Bundesamt für Kartographie und Geodäsie (more...)

Publications

• Tiltmeter im Tiefenlabor des Großringlasers – Ringlaserprojekt / Geodätisches Observatorium Wettzell, 2009 (more...)
• Die digitalen Zenitkamerasysteme TZK2-D und DIADEM zur hochpräzisen Geoidbestimmung. Hirt C et al., 2005 (more...)
• HOBIT-The new Hamburg Ocean Bottom Tiltmeter: A First Deployment at Columbo Seamount, Aegean Sea. Hort M et al., 2007 (more...)
• Hochpräzise Neigungsmessung mit dem elektronischen Einachspendelsystem HRTM. Kahlmann T et al., 2004 (more...)
• The tide-dependent dynamics of the Ekström Ice Shelf, Antarctica. Kobarg W, 1988 (more...)