To provide a displacement measuring device capable of measuring three independent displacements in the coaxial direction with one displacement sensor.
A face bar 25 excited by a spring 24 is crimped to the end sections of three displacement transmission rods 23 in this displacement measuring device. Three displacement transmission rods 23 are arranged in parallel in the well axial direction on the same circumference, and a displacement measuring pin 26 located on the circumference parallel with that circumference is crimped to the opposite face of the face bar 25. The displacement measuring pin 26 is protruded on the end section of a rotor 27 arranged at the shaft center movably in the axial direction. The rotor 27 is pressed toward the face bar 25 by a spring 28. The rotor 27 moved in the axial direction by the rotation of the displacement measuring pin 26 transmits its axial displacement to one nonrotational displacement sensor 29.
ONODERA YUKI
SATO MASARU
KOSUGI MASAYUKI
TERA KK
GEOSCIENCE RES LAB
Yui Iigo