How does a borehole extensometer work?
What is a Borehole Extensometer? An extensometer is a measuring device designed to measure changes in the length of a specific object. When mounted in a fixed position relative to a bank of soil or a rock face, extensometers are capable of measuring displacement (movement) with a high degree of accuracy.
How do you use an extensometer?
And axial strain by clicking the zero balance besides. The next thing we’ll do is we’ll remove the pin from the extensometer. Black thing that’s in the back and lets it.
How does a contact extensometer work?
The principle works by illuminating the specimen surface with a laser, the reflections from the specimen surface are then received by a CCD camera and processed by complex algorithms.
What is the difference between extensometer and strain gauge?
The extensometer strain measurement method was found to be capable to measure the strain in higher quality compared to crosshead. In contrast, the strain gauge is not capable to measure strain beyond yield point, due to the no contact between the sample and strain gauge.
Why is an extensometer used?
Extensometers are generally used in industries where manufacturers need to test tensile strength of the materials they use, to determine if they can withstand the amount of strain typically put on them. Extensometers are also used in field settings, such as mines.
What is the least count of extensometer?
0.001 mm
Electronic Mechanical Extensometer (Model : EE – 2)
| Technical Data : | ||
|---|---|---|
| 1) | Measuring Range (Extension) | 0-2 mm |
| 2) | Least Count | 0.001 mm |
| 3) | Guage Length (Adjustable) | 25, 30, 45 & 50 mm |
| 4) | Thickness or diameter of specimen | 1 to 20 mm |
What are the basic requirements of extensometer?
The requirements for an extensometer are determined primarily by the characteristics of the material to be tested. This includes its shape and dimensions, test requirements and the formal standards that must be met. These define the gage length, accuracy, test sequence and environmental conditions.
What is the output of an extensometer?
Most extensometers have either a strain gage bridge or a “high-level” analog output (usually ±10V or 0-10V).
Why do you need an extensometer?
How do you calibrate an extensometer?
Instron 3366 – Calibration of Extensometer – YouTube