Test and evaluate a linear position sensor Essay Example

in order to minimize error. I ensured that when applying weights to the mechanical contact of the sensor, I did not force them down, but instead allowed them to rest freely while keeping the string taut enough to keep the weights upright without constraint. This approach ensured that the experiment's conditions for taking measurements remained constant and helped improve accuracy. The experiment's results reveal that increasing the mass on the mechanical contact, or the force on it, reduces the output P.D or voltage. As a result of the force on the mechanical contact, its resistance decreases and it is pushed inward.

As per the equation V=IR, a potential divider circuit generates a lower voltage output when the sensor's resistance varies due to environmental factors such as an applied force. Thus, the circuit monitors the proportion of P.D. across the sensor to generate an output P.

Based on the outcomes, it can be observed that the highest voltage output is 4.95V, indicating that the voltage across the static resistor in the first circuit is zero.

05 V. Anomalies occurred during the experiment where low output P.D readings were recorded for the 950g-850g masses when starting with maximum weight and gradually decreasing. This was due to improper balancing of weights on the mechanical contact leading to inaccurate readings as experiment conditions changed.

Based on the information presented, we can conclude that the sensor's estimated operating force falls within the range of 2.0 N to 7.8 N. This supports the accuracy of my experiment, as it closely aligns with the manufacturer's reported estimate of 2.

Both sets of results and corresponding graphs demonstrated that the sensor's output P.D readings were higher when

gradually adding weights ranging from 0 N to 7.5 N than those recorded when gradually decreasing the applied weights. These differences might be due to random or even systematic errors, as the average difference of 0.05 V is evident across the board.

The graph displays a smooth curve, but its accuracy is uncertain. The weights were balanced consistently on the mechanical contact, but without a guarantee of exactness. Furthermore, the contact's inefficiency and friction make it difficult to detect precise details or smaller changes with lighter weights or force, resulting in sudden jumps in output P.

During the experiment, it was observed that the lighter weights produced lower readings due to friction. Although WD 40 was applied to reduce friction and improve the movement of the mechanical contact, the problem persisted. This issue also affects the sensor's sensitivity, as minor changes may not be detected until they reach a certain point, causing a sudden jump in readings. Therefore, we can conclude that utilizing a linear position sensor in a potential divider circuit results in an output P.

A change in the resistance of a sensor in response to its environment results in a corresponding change in output voltage or P.D. Specifically, an increase in the force exerted on the sensor's mechanical contact leads to a decrease in the sensor's resistance and output voltage or P.D. Based on this experiment and prior sensor research, I recommend contact linear position sensors for automotive applications.

The reason for the necessity of a sensor is due to the need for continuous monitoring of the engine compartments, specifically the activity of the cylinders and pistons. This sensor is durable and suitable for

the harsh conditions within an engine compartment where high temperatures are common. It also has a prolonged lifespan and can be customized to meet the specific requirements of the consumer while being an economical solution.