![]() ![]() The challenge is to design a sensor that can measure the airflow without disturbing the crucial parameters like temperature, humidity, and flow itself. The most suitable sensor is designed to measure airflow near the leaf. The thesis aims to investigate different types of sensors and designs capable of measuring low airflows (< 1 m/s). The thesis is part of a bigger project "Plantenna" which is a collaboration of 4 universities. Refer Sensors and transducers article which covers types, basic functions and provide links to sensors and transducers.Design of low airflow sensor to measure airflow near plants leaf. Sensor RELATED LINKSĪlso refer IoT compliant sensors which includes ambient light sensor, optical sensor, gesture sensor, proximity sensor, touch sensor, Thin platinum wire can get damage if not handled properly.Oil and dirt contaminates hot wire and hence deteriorates accuracy of sensor.Disadvantages of Hot Wire MAF Sensorįollowing are the disadvantages of Hot Wire MAF Sensor: Avoids use of separate pressure sensor and temperature sensor to determine air mass.It is durable as there are no moving parts.It is less sensitive to location as well as orientation.It responds faster to changes in air flow rate.The MAF sensor curve for air flow versus output voltage is shown in the figure-3 above.įollowing are the advantages of Hot Wire MAF Sensor: At the same time Control circuit measures current flow and proportionately puts out.When air flow increases, hot wire loses heat and control circuit compensates this by increasing.Hot wire is kept at constant temperature with respect to thermistor using electronic control.Thermistor measures incoming air temperature.Let us understand working of hot wire mass airflow sensor. The same has been depicted in the figure-2. It consists of thermistor, platinum hot wire and electronic control circuit. The Hot Wire type of MAF sensor is most common and most popular. Hot Wire MAF Sensor Mass Airflow Sensor(MAF sensor) working.The information will help for the following.įollowing are the types of Mass Airflow sensors: The Mass Airflow Sensor (MAF sensor) converts amount of air available in the engine into voltage signal.Īir volume information is essential to calculate load in the ECM (Engine Control Module). Throttle body directly in intake air stream. As shown it is placed between air cleaner and The figure-1 depicts position of Air Flow Sensor. Mass Airflow Sensor-MAF sensor construction Mass Airflow sensor and Oxygen Sensor are used together toĬontrol air/fuel ratio accurately in the engine. In each of the cylinder compare to volumetric flow sensors. MAF sensors are more useful and more appropriate to determine quantity of air intake The air mass details are required in order to balance correct amount ofĪs air density depends on temperature, altitude as well as application of forced induction, ![]() It mentions advantages and disadvantages of MAF sensor over Vane meter.ĭefinition: The sensor used to determine mass flow rate of the air is It mentions Mass airflow sensor(MAF sensor) construction and working of Mass airflow sensor(MAF sensor). This page describes basic function of Mass airflow sensor (i.e. Mass airflow sensor basics | MAF sensor working ![]()
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