Question

 I have to write a review paper of one measurement technique (any device you feel interested in or have experience with), which could be what I have learned in Mechanical Measurement course.
The main content should include how it operates, its application, changes in design with time, and future direction. Although I have to focus on recent and future development.

Would you give me any examples of devices or suggest essay topics ?

 

Answer 1

The best and easy topic you can choose is vernier caliper. You can make a full length topiconvernire caliper. As it has vast applictaion in industries due to its developments.  

The Vernier caliper is an extremely precise measuring instrument; it is used to measure internal and external distances extremely accurately – the error may be as little as 0.05 mm – depending on the make.The VERNIER is a small movable graduated scale for obtaining fractional parts of subdivisions on a fixed main scale of any measuring instrument. With a normal scale we may be able to measure down to 0.50 mm or so, while with a vernier scale the least count may be 0.10 mm. Usually vernier calipers have both imperial (inches) and metric (mm) scales. Modern calipers are digital – in the sense it has an LCD display on which the reading appears – there is no possibility of human error in reading the scale. So you can mention these developments in vernier. Modern calipers are digital – in the sense it has an LCD display on which the reading appears – there is no possibility of human error in reading the scale

One of the application ou can mention is High-Resolution Ultrasonic Distance Measurement System Using Vernier Caliper Phase Meter. An ultrasonic distance measurement system for use in air is presented. The measurement is based upon the two-frequency continuous-wave (TFCW) phase-shift method. In the system, two Vernier caliper phase meters are used to measure the phase-shift data. The phase meter circuit developed to emulate the Vernier caliper to measure the phase shift is able to eliminate the measuring error and produce higher resolution results without increasing the clock frequency. A single-chip microprocessor is used to control the TFCW phase-shift measurement and send the data to a personal computer for distance calibration and examination. The experimental results show that the accuracy of the system is ±0.1362 mm and the distance resolution is 0.04% of the wavelength corresponding to the 40-kHz ultrasonic wave at a range of 50-200 mm. Therefore, the main advantages of this system are high resolution, high accuracy, low cost, and ease of implementation