Abstract
Objective:To focus on a device development for measuring the weight-bearing on feet while simultaneously reporting data on smartphone usage. Secondly, the output data from this device are tested for the accuracy.Methods:Researcher used eight pieces of 50 kg Body Load Cell Weighing Sensor Resistance strain Half-bridge Original (four pieces per foot), two pieces of HX711 amplifier, MCS-51 AT89 C51 microcontroller and HC-05-Bluetooth to develop the device. This device that is called the Wireless Weight-Shifting Detector (WWSD) is used to measure weight-bearing on feet by being attached to sandals. The output data are simultaneously reported on smartphonevialine-graphs [load (kg) per sampling data] and numeric by FootpressV1 application. The device was tested using accurate measuring data with standard weights and calculated in percentage of accuracy (%). After that, WWSD was used to compare the weight-bearing measurement during standing with forceplate (AMTI; OR6-7 Platform).Results:The percentage of accuracy of WWSD was more than 97% and the error values from the measuring standard weights ranged under ±0.23 kg. The accuracy of measurement was more than 95% when compared with the force plate.Conclusion:WWSD can report simultaneously the weight-bearing on feet with rather accurate data on smartphone. It may be helpful in assisting physical therapists while training patients in clinic.
Highlights
The weight-bearing on feet is a method of physical therapy assessment
Wireless Weight-Shifting Detector (WWSD) can report simultaneously the weight-bearing on feet with rather accurate data on smartphone
It may be helpful in assisting physical therapists while training patients in clinic
Summary
The weight-bearing on feet is a method of physical therapy assessment. An information about the weight-bearing between the left-side and the right-side refers to the effectiveness of balance system and shows a good alignment and normal functioning of the back and the legs [1 - 3]. The weight-bearing on feet is used for the physical therapy assessment on both neurological [4, 5] and orthopedics assessments [6 - 8]. The clinical assessment of weight-bearing on feet uses typically the scales (spring scale or digital scale), there are some limitations. The spring scale has a problem with the reading data. The digital scale reports only a value per measurement, it cannot continuously report the output data. The user must read the output only on the screen, it is very difficult to achieve feedback information for training patients
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