Knee height, forearm length, demi-span digital measurement device
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Date
2017-06
Authors
Muhammad Hammad Rauf
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Abstract
This brief shows the desire to investigate and propose the suitable device to measure knee height, forearm length and demi-span. Evaluation of nutritional status rely on accurate measurement of not only body weight but also height. However, a number of common disabilities and diseases make it difficult to accurately measure standing height in many patients. Therefore, various formulae based on bones that do not change length have been developed. These methods include knee height, forearm length and demi-span. In measuring the length of the bones, an uncomplicated, effortless, sensitive and reliable device is sought. An ultrasonic sensor HC SR04 coded by the Arduino UNO is chosen to measure the lengths added by a creative mechanism to reflect back the waves which is then displayed on a LCD display. Measurement of up to 400cm could be made with accuracy of ±0.3cm.