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The Eötvös (or often Eötvös-Pekár) torsion balance was designed to experimentally show equivalence between gravitational and inertial mass in physics. Since the measuring principle can also be exploited to determine the local gradient of the gravitational field, such devices were also widely used to detect underground oil resources roughly a century ago. To provide more accurate measurements, the device’s operation has been recently automated, which eliminates the necessity for human readings and manual rotations to change the azimuth of the balance. The paper presents a tailor-made, programmable rotation mechanism using a high-accuracy (under 0.7 arcsecond) optical rotation sensor designed to smoothly turn the apparatus and record the azimuths with high precision. The rotation device needs to meet special specifications due to the physics of the measurement. The device’s architecture, its simple control algorithm and the supervision and teleoperation software are presented, and the operational experiences are discussed.

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High-Precision Teleoperated Rotating Mechanism for the Eötvös Torsion Balance

  • 会议论文

  • 发表日期：

    2026年

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  • Bálint Kiss,
  • Gábor Péter,
  • Gyula Tóth,
  • Lajos Völgyesi,
  • György Szondy,
  • Edit Fenyvesi,
  • Gergely G. Barnaföldi,
  • Péter Lévai,
  • Péter Kovács,
  • Máté Pszota,
  • Emőke Imre,
  • Péter Ván

摘要

The Eötvös (or often Eötvös-Pekár) torsion balance was designed to experimentally show equivalence between gravitational and inertial mass in physics. Since the measuring principle can also be exploited to determine the local gradient of the gravitational field, such devices were also widely used to detect underground oil resources roughly a century ago. To provide more accurate measurements, the device’s operation has been recently automated, which eliminates the necessity for human readings and manual rotations to change the azimuth of the balance. The paper presents a tailor-made, programmable rotation mechanism using a high-accuracy (under 0.7 arcsecond) optical rotation sensor designed to smoothly turn the apparatus and record the azimuths with high precision. The rotation device needs to meet special specifications due to the physics of the measurement. The device’s architecture, its simple control algorithm and the supervision and teleoperation software are presented, and the operational experiences are discussed.