Self-contained unit for the demonstration of the methods of noise and vibration control. Anodized aluminium structure. Main metallic elements in stainless steel.
Diagram in the front panel with similar distribution that the elements in the real unit.
Integral 240 V. electric motor and gear box together with a fan (12 V.) unit provide two noise sources. Variable control of both voltage sources allows speed control of both motors.
A rigid reinforced enclosure with acoustic lining may be placed over either noise source attachements allow investigation of sound attenuation in ducts.
Openings in both ends of the box allow demonstration of the effects of small holes in the enclosure and the transmission of mechanical and aerodynamically generated noise along ducts.
Two microphones are provided, one fixed adjacent to the noise source and the other mounted on the wand that may be moved around over the unit.
Each of the two microphones may be connected to a dBA filter and amplifier that illuminates a bar display in the panel, to show relative loudness levels.
Resilient mountings and mount bypass equipment. These allow study variation of vibration modes at various frequencies and transmission of noise through solids.
It can be controlled by computer by using control interface box and data acquisition borad to be placed in the computer solt.
Some Practical Possibilities of the Unit:
1.- Demonstration of noise and vibration control.
2.- Attenuation of mechanical or aerodynamic noise source using a rigid enclosure and combining this with an absorbent acoustic lining.
3.- Rapid degeneration in effectiveness of the enclosure method, due to minor imperfections in construction.
4.- The transmission of noise along ducts and methods of attenuation using acoustic linings.
5.- The transmission of noise along solid paths and he methods of reduction by isolation.
6.- Rigid body modes of vibration of a resiliently mounted source and the effects of mass variation on the resonant frequencies and modes of vibration.
7.- The effect of the noise frequency on the effectiveness of attenuation methods.
Other possible practices:
8.- Sensors calibration.
Practices to be done by PLC Module (PLC-PI)+PLC Control Software:
9.- Control of the TDRC unit process through the control interface box without the computer.
10.- Visualization of all the sensors values used in the TDRC unit process.
11.- Calibration of all sensors included in the TDRC unit process.
12.- Hand on of all the actuators involved in the TDRC unit process.
13.- Realization of different experiments, in automatic way, without having in front the unit.(This experiment can be decided previously).
14.- Simulation of outside actions, in the cases do not exist hardware elements. (Example: test of complementary tanks, complementary industrial environment to the process to be studied, etc).
15.- PLC hardware general use and manipulation.
16.- PLC process application for TDRC unit.
17.- PLC structure.
18.- PLC inputs and outputs configuration.
19.- PLC configuration possibilities.
20.- PLC program languages.
21.- PLC different programming standard languages (literal structured, graphic, etc.).
22.- New configuration and development of new process.
23.- Hand on an established process.
24.- To visualize and see the results and to make comparisons with the TDRC unit process.
25.- Possibility of creating new process in relation with the TDRC unit.
26. PLC Programming Exercises.
27.- Own PLC applications in accordance with teacher and student requirements.