Pressure fluctuations in a mixing tank can provide valuable information about the existing flow regime within the tank, which in turn influences the degree of mixing that can be achieved. In the present work, we propose a prototype for identifying the flow regime in mechanically stirred tanks equipped with four vertical baffles through the characterization of pressure fluctuations. Our innovative proposal is based on force sensors strategically placed in the baffles of the mixing tank. The signals coming from the sensors are transmitted to an electronic module based on an Arduino UNO development board. In the electronic module, the pressure signals are conditioned, amplified and sent via Bluetooth to a computer. In the computer, the signals can be plotted or stored in an Excel file. In addition, the proposed system includes a moving average filtering and a hierarchical bottom-up clustering analysis that can determine the real-time flow regime (i.e., the Reynolds number, Re) in which the tank was operated during the mixing process. Finally, to demonstrate the versatility of the proposed prototype, experiments were conducted to identify the Reynolds number for different flow regimes (static, laminar, transition and turbulent), i.e., $0\le Re\le$ 42,955. Obtained results were in agreement with the prevailing consensus on the onset and developed from different flow regimes in mechanically stirred tanks.

En muchos procesos industriales en los cuales el ensamblado de piezas está involucrado, los operadores no cuentan con información en tiempo real del ritmo de producción que llevan. En este artículo se estudia el efecto sobre el rendimiento de los operadores cuando éstos cuentan con información sobre el cumplimiento de los objetivos que les fueron encomendados, para esto, se realizaron dos casos de estudio; en primer lugar, se ensambló una chapa metálica y posteriormente, un soporte para soldar. En ambos casos, se realizó el experimento primero sin ningún tipo de información y posteriormente se incorporó un Sistema Visual de Información. Se efectuó un análisis cuantitativo sobre el efecto que se tuvo en los indicadores claves del proceso al contar con información y sin ella. Adicionalmente, se realizó un análisis cualitativo sobre la percepción que los usuarios tuvieron del sistema de información visual. Los resultados demuestran que, el sistema contribuyó a mejorar la calidad de las piezas ensambladas y a disminuir el tiempo ocioso, al permitir detectar anormalidades dentro del proceso. Por otro lado, los operadores valoraron favorablemente el sistema ya que, determinaron que el nivel de estrés y atención disminuyó, cuando se contaba con información en tiempo real. In many industrial processes in which the assembly of parts is involved, operators do not have real-time information on the rate of production they are carrying. This article studies the effect on the performance of the operators when they have information on the fulfillment of the objectives that were entrusted, for this, two case studies were carried out; First, a metal sheetwas assembled and later, support for welding. In both cases, the experiment was carried out first without any type of information and later a Visual Information System was incorporated. A quantitative analysis was carried out on the effect that was produced in the key indicators of the process when having information and without it. In addition, a qualitative analysis was carried out on the perception that users had of the visual information system. The results show that the system contributes to improving the quality of the assembled parts and reducing idle time, by allowing the detection of abnormalities within the process. On the other hand, the operators valued the system favorably since they determined that the level of stress andattention decreased when there was information in real time.