Design of a Centrifugal Force-Based Speed Sensor for Downhole Turbodrills

Table 2

Parameter values of the sensor structure.

Parameter	Value	Note
	0.15	Pig iron-pig iron (rust prevention), no lubrication
	0.0414 kg	Cylinder, diameter 22 mm, thickness 15 mm, with a φ 6 mm through-hole
	7.5 mm
	12 mm
	30 mm
	52.29 N/m	The extreme extension amount is 25 mm