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Mechanical resistance detection to spot mechanical stop

IP.com Disclosure Number: IPCOM000249099D
Publication Date: 2017-Feb-06
Document File: 7 page(s) / 77K

Publishing Venue

The IP.com Prior Art Database

Abstract

Through the resistance change from the resistance strain gauge it is clear to detect mechanical resistance and stop. If the part where the resistance strain gauge is placed claims pull or push forces the voltage value of the bridge circuit will change. This value Change shows mechanical stops and resistivity as well as pull or push forces.

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Slide 1 of 7

Mechanical Resistance Detection to Spot Mechanical Stop

Through the resistance change from the resistance strain gauge it is clear to detect mechanical resistance and stop. If the part where the resistance strain gauge is placed claims pull or push forces the voltage value of the bridge circuit will change. This value change shows mechanical stops and resistivity as well as pull or push forces.


Slide 2 of 7

Mud

Oil

p

tensile force

Blades extended

Sealed

Sealed

Mud

Oil

p

compressive force

Blades retracted

Sealed

Sealed

[This slide contains 2 pictures or other non-text objects]


Slide 3 of 7

Blades extended: tensile force extend the resistance strain gauge

Blades retracted: compressive force compress the resistance strain gauge

After noticed peak blades are extended or

retracted. Now, signal doesn´t matter furthermore

it´s just to see whether the blades are out or in.

To check that the blades are stay extended control

the hydraulic pressure as long as pressure is

Available the blades are extended.

Signal

peak

time

Advantages: No calibration of the sensor because

only the peak is important.

The Tool can be much shorter (no LVDT anymore)

Depth

time

Start activate

blades


Slide 4 of 7

Abstract: Through the resistance change from the resistance strain gauge it is clear to detect

mechanical resistance and stop. If the part where the resistance strain gauge is placed

claims pull or push forces the voltage value of the bridge circuit will change. This value

Change shows...