5 papers
Temperature dependence of broadband seismometer sensitivity
Tomofumi Shimoda, Wataru Kokuyama, Hideaki Nozato
Broadband seismometers are widely used in global observation networks deployed for geophysics research. Recently, the calibration of their sensitivity has become an important facto…
Accurate laboratory testing of low-frequency triaxial vibration sensors under various environmental conditions
Tomofumi Shimoda, Wataru Kokuyama, Hideaki Nozato
Triaxial vibration sensor are widely used used in various application. Recently, low-cost sensors based on micro electro mechanical system (MEMS) technology are also becoming more…
Optical sound pressure measurement using Fabry-Pérot cavity for primary acoustic standards
Koto Hirano, Wataru Kokuyama, Hajime Inaba +5
Optical sound pressure measurement is a promising technology to establish primary acoustic standards without reliance on specific types of microphones. We developed a precision opt…
Measurement of the intrinsic sensitivity for a single-ended accelerometer without the influence of the mounting condition
Tomofumi Shimoda, Wataru Kokuyama, Hideaki Nozato
The calibration technique for accelerometers has been internationally developed for up to 20 kHz to ensure the reliability of vibration measurement. However, it has been establishe…
TOrsion-Bar Antenna: A Ground-Based Detector for Low-Frequency Gravity Gradient Measurement
Satoru Takano, Tomofumi Shimoda, Yuka Oshima +12
The Torsion-Bar Antenna (TOBA) is a torsion pendulum-based gravitational detector developed to observe gravitational waves in frequencies between 1 mHz and 10 Hz. The low resonant…