abstract
- © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.The ergonomic assessment is based on the detection of the worker¿s risk factors. The official Mexican standard 036 (NOM-036) establishes the elements to identify, analyze, prevent and control ergonomic risk factors for manual material handling. The objective of this work is to present the design and implementation of a non-invasive and portable device that helps the tracking and remote evaluation of possible ergonomic risks based on the mentioned standard. A quantitative interpretation of the NOM-036 was made using a geometric GeoGebra model, in order to obtain the angular classification for the key positions of the user¿s joints. As a result, the device incorporates inertial unit measurement sensors: MPU-6050, to obtain the relative angular position of the critical joints of the human body. Data interpretation is performed by an ESP8266 microcontroller, which then transmits the information to two interfaces: a dashboard displayed in a web application, and a local desktop application developed applying the MQTT communication protocol. This ensures a robust system and accessibility to the data. The implementation of the device resulted in real data acquisition that translated into posture quality. The overall results had a low error rate: below 10% and were reported within the standard classification.