Comparison of Different Accelerometer Types Essay

The pendulum was pulled to about 15 cm from the motion detector. In case of the mass on a spring, the mass was pulled till just a few inches away from the motion detector.

The profession of mechanical engineering is a broad discipline of engineering. Mechanical engineers research, design, develop, build, and test mechanical and thermal sensors and devices, including tools, engines, and machines. The duties in this career typically include: analyzing problems to see how mechanical and thermal devices might help solve a problem, designing, or redesigning mechanical and thermal devices or subsystems (a set of interconnected systems), using analysis and computer-aided design, developing and testing prototypes of devices they design, analyzing the test results and changing the design or system as needed, and overseeing the manufacturing process for the device. The designing and testing of the various devices shows the

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The specimen ends were not thick or had moving wedge grips to keep it secure in the holders of the servo-hydraulic load frame. The movement of the specimen in the machine causes some of the data to be an inaccuracy. Also, the transverse strain causes issues with the strain gages that are called transverse sensitivity. The transverse sensitivity affects the accuracy of the data that is being collected for the transverse strain more than the longitudinal strain. This is greatly seen in the percent difference in the strain values such as in one case the Longitudinal strain was .4% while the transverse strain was 30%. Another issue with the strain gages was that if the strain gages weren’t properly placed on the specimen the data accuracy would

Loosen the retaining screw and adjust the horizontal arm to the dimple that produce the 2nd largest radius between the spinning mass and the rotating shift. Allow the spinning mass to hang straight down, without being connected to the spring. Position the pointer directly below the tip of spinning mass and secure the pointer to the base. Use the scale located on the base to determine the radius, r, of the pointer from the rotating shaft. Record this value onto Data Sheet A. The experimental uncertainty in r is estimated to be the width of the spinning mass tip – approximately 0.2 cm.

\emph{Solutions implemented:}The key here was to make sure that experiment setup is organized in such a way that the force is applied only on the sensing part of the sensor and the readings were taken by maintaining the similar point of contact. There were total 363 readings taken for different load applied between range 0.5 grams to 625.5 grams and for each load output voltage was recorded and plotted. The final curve obtained have a much better linear response as compare with the old curve.The result section \ref{c:result} discussed about it in more

Introduction During this lab you will become more familiar with the concepts of torque. The purpose of this lab is to determine if the rotational equilibrium condition, Στ = 0, holds experimentally. Equipment Meter stick (1) - no metal ends Fulcrum (1) Clamps (4) Weight Hanger (1) Mass Set (1) Digital Scale (1)

Theory: During the early part of the seventeenth century, Galileo experimentally examined the concept of acceleration. One of his goals was to measure the acceleration due to gravity, or the acceleration of freely falling objects. Unfortunately, his timing devices were not precise enough to measure the free fall time directly. He decided to “dilute” gravity by using fluids, inclined planes, and pendulums.

Fig. 1. (a) Schematic view of the structure at rest. (b) Schematic view under external acceleration

1. There is a force being put on the bench, but no it does not pull back. Yes, if a person was holding another sensor then there would be a force from that person holding the sensor so it won’t move. That’s why we use our lab bench.

2 Solution Outline For our final project we plan to use the following sensors: sonosensor (hears the clap from the user to perform an action based on the input), an IR sensor (detects infrared waves and detects heat close to the sensor), 4 IR sensors (tracks a line on a platform to follow the path; 4 sensors for additional mobility and accuracy). After looking up more on Sound Sensors, we found that it works by detecting differences in air-pressure and then converts that into electrical signals. Hence, when it detects a loud clap, it signals the motor to stop and thereby breaks a circuit. An IR sensor works on the principal that, by using a specific light sensor to detect a select light wavelength in the Infra-Red (IR) spectrum. By using an LED which produces light at the same wavelength as what the sensor is looking for, you can look at the intensity of the received light. When an object is close to the sensor, the light from the LED bounces off the object and into the light sensor. This results in a large jump in the intensity, which can be detected using a

To understand how an accelerometer works, one must first understand the concept of vibration. One example of vibration is sound. When an object vibrates and creates a disturbance in a medium, it creates a sound wave. The sound wave travels in sinusoidal form with certain frequencies. This affect was observed in this experiment with a guitar string, a motor, and a cell phone. The vibration of these systems can be measured with an accelerometer. The accelerometer converts mechanical acceleration to an electric signal.

Puttaswamy (Sri Venkateshwara College of Engineering, Bangalore). With the help of professors from the Department of Electronics, I worked on understanding the piezoelectric effect of Lead Zirconate Titanate (PZT) disks. I was also responsible for designing and testing prototype concrete slabs embedded with PZT disks under moving vehicular loads. The tests resulted in extremely minute voltages being generated roads in the future. Overall, this was an incredible experience which not only made me realize the scope of piezoelectric material but also helped me further my understanding of concrete technology. Moreover, I was exposed to other possible applications of piezoelectric material in the form of sensors for health monitoring of

Below are two tables in which I have recorded the data which I obtained during the experiment. The first table reflects the Relationship between the deflection/flexion of the cantilever and the mass of the load and the second table reflects the relationship between the flexion of the cantilever and the length of the cantilever.

The beam was loaded the mid-length in 2.745 lbs. increments up to 6.745 lbs. The change in clearance of every load step was measured and data was recorded.