Through the experiment, students can master measurement method of
length and micro displacement and improve experimental techniques.
This apparatus is equipped with a Hall position sensor on the base
of the Laboratory apparatus for measuring Young's modulus with
bending method, and it can help students to better understand and
master the new measurement method of micro displacement with
non-electric-quantity method. The experimental device and method of
this apparatus are greatly improved comparing to old apparatus. The
original experimental contents are remained and additional
experimental contents is added, such as structure, principle,
characteristics and operation of Hall positional sensor, which will
adds to student's knowledge. The apparatus has been getting
favorable comments since being put into market. Its test data is
stable and reliable, teaching contents are advanced and rich. The
error of the apparatus in measuring Young's modulus is 3% comparing
to standard value.Â
The apparatus can be used to complete following experimental
contents:Â
1. Getting familiar with characteristics of Hall positional sensor,
measuring young's modulus of brass with bending
method;Â
2. Calibrating Hall sensor when measuring Young's
modulus;Â
3. Measuring Young's modulus of malleable cast iron with Hall
sensor.Â
Main technical indicators of the apparatus:Â
1. Reading microscope: Range 8mm resolution 0.*1mm amplification
*0Â
2. Weight: *0.0g and *0.0gÂ
3. Digital voltmeter: *-and-half; Range
**0mVÂ
4. Sample: Brass and forgeable iron
