The paper "Automotive Fuel Level Indicators" is a wonderful example of a report on design and technology. Automotive fuel level indicators are vital instruments that depict the amount of fuel remaining in a tank. These may also be deployed for checking liquid levels for underground storage tanks which are considered inaccessible for sounding purposes. The existing systems have however been found to be notoriously inaccurate thus the resolution to find other better means of measuring fuel levels. The old technique relies on analogue resistive gauges whose nature of the operation is fast fading and becomes unfavourable for the future.
This paper explores the potential deployment of Hall Effect Sensor in nulling the shame that drivers may face due to inaccuracies of the existing system of fuel level measurement. Description of the Project This project seeks to find a suitable replacement for the analogue resistive automotive fuel level indicator which has proven to be inaccurate. The Hall Effect Sensor is based on magnetic field variation in order to vary the output voltage in a linear manner. Electricity is carried through a separate conductor which produces electromagnetism without interrupting the circuit.
This is done through a wound core which surrounds the conductor to be measured. This system is applicable since the automotive fuel tank is constructed of ferromagnetic materials which can practically rely on this new technology. The working mechanism is that the Hall Effect Sensor shall be fixed at the top of the tank with a permanent magnet in place of the electromagnet in order to avoid any explosions. The magnetic field shall automatically increase on the addition of fuel and vice versa when fuel reduces thereby resulting to a voltage increase and reduction respectively (Divakar, 2014). Figure 1: Hall Effect (Honeywell, 2013). Implementation Abstracting the Problem The problem with the existing fuel level indicators squarely lies in their inability to give accurate feedback due to shifts in weather conditions and other environmental conditions that affect the resistivity of a given material.
Temperature conditions, for example, are likely to lower or raise the resistance of the float type sensors which are considered as inferior to the Hall Effect Sensors. The gauge unit that is incorporated to the float type sensors is also considered as an analogue system that has to be overhauled owing to the digitization of most existing technologies.
Therefore, this system shall be embedded with microcontrollers or microprocessors on the output section in order to provide the end-user with an accurate digital user interface that is also friendly to laymen. Division of Tasks The tasks of this instrumentation exercise shall be broken down as shown in the diagram below. First of all, it shall be important that the quantity to be measured be known in order to choose the correct sensor mechanism to be deployed since there exist several types of Hall Effect Sensors.
Some of these sensors include linear hall sensors which can be used to measure the level of fluid with regard to the major parameter (height) and rotating level sensors which are diametrically magnetized (Jain, 2012). Once the quantities have been established, the input interface of the sensor has to be designed in order to come up with a user friendly and readily integral system. The hall element should not, however, be ignored as this is the heart of this system thus an analysis should be carried out on the Hall Effect theory prior to the digitization of the output.
Once the nature of the output is established through mathematical analyses, it shall be tallied against the user interface values to ease the automation process. This shall automatically be in form of electrical voltage which has to be converted to tank level for the end-user to distinguish between an empty and a full tank while driving.