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VI Registro de temperatura y representación de los datos

Module by: Juan Martínez. E-mail the author

Based on: Temperature Application VI by National Instruments

Summary: En este ejercicio, se aplicarán los conocimientos adquiridos sobre estructuras, registros de desplazamiento, diagramas para formas de onda, arrays, gráficos, entrada y salida con ficheros, etc.

Exercise 1

  1. Construir un Instrumento Virtual para ejecutar las siguientes tareas:
    1. Tomar una muestra de temperatura cada segundo hasta que se detenga la ejecución o se produzca un error.
    2. Visualizar la temperatura actual y la promediada de las 3 últimas medidas en un waveform chart.
    3. Si la temperatura excede un límite determinado, encender un diodo LED.
    4. Después de cada medida, registrar la fecha, la hora, incluyendo los segundos, la temperatura, la media de las 3 últimas medidas de temperatura y un mensaje de una palabra, describiendo si la temperatura es normal o supera el límite. Registrar los datos, de tal manera que cada elemento aparezca en una columna de la hoja de cálculo como se muestra en la figura 1.
      Figura 1
      Figura 1 (tempappxls.png)
    5. Una vez finalizada la toma de muestras, plotear los valores de temperatura leídos y la curva que mejor se ajuste en un gráfico XY y mostrar las temperaturas media, máxima y mínima.

      sugerencia:

      Comenzar con el VI Temperature Logger. Para completar el ejercicio usar partes del Instrumento Virtual Análisis de temperatura.

      sugerencia:

      El VI Express Build Text está limitado a 8 entradas. Usar varios VIs Express Build Text o usar la función Format into String. También se podría construir los delimitadores en la cadena de formato para necesitar menos entradas.
      El panel frontal debiera ser similar al de la figura 2.
      Figura 2
      Figura 2 (tempapp.png)
  2. Salvar el VI como Temperature Application.vi en el directorio C:\Exercises\LabVIEW Basics I.

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