1. Introduction Analyzing the vibration is one the most important technique that helps to evaluate the condition of the equipment and the causes of the vibration. The vibration in the equipment is just the movement or oscillation of the machines and components such as motor, bearing, shaft and gears (Reliable plant, n.d). By analyzing the vibration, it helps maintenance team to determine the causes of that vibration and has the right suggestions to repair the equipment. Moreover, vibration analyses equipment gives more visible condition to repair the damages before the major breakdown happen. Using the vibration devices will save the cost of breakdown in times of maintenance requirement and operation impact. Ignoring the vibration will led to a disaster especially for those industries which run the operation with very critical equipment such as turbines, pumps, …show more content…
The Principle of Operation of a Piezoelectric Accelerometer Piezoelectric accelerometer is a device or system that uses mechanical vibrations to measure acceleration on a surface. It is converting mechanical energy and motion into electrical signal proportional to the applied acceleration (Cory Janssen, n.d). Figure 1 Piezoelectric accelerometer One side of the piezoelectric material is connected with an inflexible column at the sensor base. A supposed seismic mass is appended to the next side. At the point when the accelerometer is subjected to vibration a power is produced which follows up on the piezoelectric component. This power is equivalent to the result of the speeding up and the seismic mass. Because of the piezoelectric impact a charge yield corresponding to the connected power is created. Since the seismic mass is steady the charge yield sign is corresponding to the increasing speed of the mass. More than a wide frequency range both sensor base and seismic mass have the same speeding up extent consequently the sensor measures the increasing speed of the test item (PC,
For each test, I was required to calculate the height of the pendulum required in order for it to have the same mass, or the quantity of matter affected by the external force of gravity, as my project. To find the height, it required understanding the process of the pendulum hitting my project step by step. As the pendulum is pulled back, it has its maximum potential energy, which is the energy possessed by a body by virtue of its position relative to other objects. When the pendulum is let go, it loses potential energy while gaining kinetic energy, or the energy that a body possesses by virtue of being in motion. At the bottom of the swing, kinetic energy of pendulum is the greatest because the change in potential energy equals the kinetic energy at the bottom of the swing. As the pendulum hits my project, there is an impulse, a force acting briefly on a body and producing a finite change of momentum, between the pendulum and project. As the pendulum hits my project, the project carries the momentum of the pendulum with it. By working in reverse order, the height of the pendulum required was
On Tuesday in lab, we wanted to measure the velocity and acceleration of a ball rolling down an incline. To do this, we made our table have an incline by putting wood blocks under two legs of the table. We placed meter sticks on a table so we could determine the distance the ball traveled for a certain amount of time. We placed the ball at the 0cm mark on the meter stick and let go of the ball so it could roll down the table. To make our results more accurate, we videoed the ball rolling down the table with a stopwatch on our phone following the ball. We then went through the video and paused it at every 10cm and recorded the time it took for each 10cm interval from 0cm to 150cm. We did this experiment with 2cm, 4cm, and 6cm inclines to show
internal structures of the body and returned to the transducer. The transducer converted the returning sound into electronic signals that were processed
A transducer is a mechanism that changes one form of energy to another form. A toaster is a transducer that turns electricity into heat; a loudspeaker is a transducer that changes electricity into sound. Likewise, an ultrasound transducer changes electricity voltage into ultrasound waves, and vice versa. This is possible because of the principle of piezoelectricity, which states that some materials (ceramics, quartz, and others) produce a voltage when deformed by an applied pressure. Conversely, piezoelectricity also results in production of a pressure whe...
the length of the slope can be used to calculate the speed of the car
Mechanical engineering is a wide subject with many definitions and qualities about them. A mechanical engineer uses the principles of energy, materials, and mechanics to design and manufacture machines or devices (“Mechanical Engineering Overview”). Another definition that furthers the idea of a mechanical engineer is they research, design, develop, manufacture, test tools and engines (“Mechanical Engineering Overview”). They not only design the tool or devices for customers, but they may also design them for other engineers to help do their job (“Mechanical Engineer Job Description,”). A mechanical engineer is also involved in the mechanisms and methods by which energy is used for practical purposes (Mechanical Engineer Job). A mechanical engineer must have a variety of qualities that are associated with them, as their job varies on daily or weekly basis. One quality a mechanical engineer must have is being strong in math and science, as most of their work deals with thi...
or serpentine drive belt. Check water pump for any obvious coolant leakage or damage. Check pulleys for cracks and damage.
Transducers used in a clinical setting are quiet complicated. “However, they share many of their design characteristics with simple, single crystal, unfocused probes.” Describing the components of a simple probe often helps people understand transducer characteristics as well as function. A basic ultrasound transducer has a case, a cylindrical tube that protects the internal components of the transducer. The electrical shield is a barrier which lines the inside of the case. This shield aids in prevention of electrical noise from interfering with diagnostic images. The acoustic insulator is also a barrier. However the insulator isolates the components of the transducer from the case. One of the most important parts of the transducer is the piezoelectric crystal itself which is involved in energy conversion. One of the more obvious components of a simple probe is the wire. The wire provides an electrical connection between PZT or active element and the actual ultrasound system. The last two components that I am going to talk about are the more important ones, the matching layer and the backing layer. The matching layer is at the face of the transducer in front of the PZT. “The matching layer is designed with impedance between that of the active element in the skin.” The ideal mat...
In this study, the aim is to provide information and knowledge more on aircraft maintenance safety precautions and procedures in dealing with ground handling, general maintenance like working at height, working in confined spaces, moving suspended loads, aircraft refuelling or de-fuelling, ground de-icing/anti-icing and so on.
Medical ultrasound mechanisms produce ultrasound waves and accord the imitated echoes. Brightness mode (B mode) is the frank mode that is normally used.[2] The B mode gives a two dimensional (2D) black and white picture that depends on the anatomical locale of the slice. The body can be imaged in disparate planes reliant on the locale of the probe. These slender slices are of less than 1 mm every single and can be sagittal, coronal, transverse, or oblique. Sound waves are emitted from piezoelectric crystals from the ultrasound transducer. Piezoelectric crystals are fabricated from physical that adjustments mechanical signals to mechanical vibrations and adjustments mechanical vibrations to mechanical signals.[2] As ultrasound waves bypass across assorted body tissues, they are imitated back to the transducer crafting an picture on the ultrasound screen.[3] Aural impedance is described as the confrontation for propagation of ultrasound waves. This varies according to the density of the physical ultrasound passes through. After the physical is extra solid, nex...
When a sound is made a vibration is sent through the air. The vibrations are let off by the source, and this leads to something such as an ear to pick up the noise. Once the detector has picked up the wave, the wave must be ...
Reliability is one of primary criteria of any maintenance activities. It’s an industry that requires high reliability levels throughout the operation of the aircraft. Preventive maintenance procedures are applied to maintain this reliability at an optimum level. Although higher level of Preventive Maintenance is not economical but if not performed than it may lead to failure of parts or equipment which lead to the aircraft grounded for long duration which may lead to huge economic loss to the company.
As the development of aviation industry grows, more and more aircraft crashes occur. There are many reasons that lead to aircraft crashes, but one of them, is because of improper aircraft maintenance. Why is proper aircraft maintenance so important? Proper aircraft maintenance is critical in order to keep the aircraft can function properly, every aircraft part is in good condition and ensure the safety of pilots and passengers. Proper maintenance has many parts. The most common part is inspections, which pilots do them every day; the main part is overhaul and repair of an aircraft; and maintenance documentation is another important part of aircraft maintenance which improper maintenance documentation has caused many incidents.
Mechanical engineering is a type of engineering which applies principles of physics and material science for the purpose of analyzing, designing, manufacturing and maintaining of mechanical systems (Gorp, 2005). It is involved with the production and usage of mechanical power in the operation of various machines and tools. Mechanical engineering is considered to be the most diverse engineering and has its breadth derived from the need to design tools and manufacture products which range from small individual parts to large systems. Mechanical engineering, as thought of by scholars, is related to Aerospace engineering, Manufacturing and Mechanical engineering (Van et al, 2011).
Engineering Mechanics deals with the rigorous study of mechanics, applied mathematics and related fields. This leads to an understanding of advanced analysis and leads to study in structural engineering, hydraulics, mechanics of solids and fluids, or properties of materials.