As a CAD specialist you need to develop standard mechanical engineering drawings such that it can be easily interpreted by the mechanical engineer. Before you start working on mechanical drawings, you must know how to use common mechanical symbols correctly. You have to take special care while relating various mechanical components design drawings to the overall plan of the assembly.

The most important types of CAD mechanical drawings associated with the design process are:

1. General Arrangement drawings
2. Detail drawings
3. Fabrication drawings
4. Assembly drawings

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The abbreviation PLC stands for programmable logic controller. It is used to automate any electromechanical process. The PLC is designed as a compatible input and output device suitable for extended temperature ranges. It is resistant to electrical noise, vibration and impact.

The PLC applications are highly customized systems. The Programs to control machine operations are stored in a battery which is backed by a non-volatile memory expressing the desired sequence of operations. The cost of developing and maintaining any automation system is high. For instance amusement rides, transit busses and metros, lighting fixtures and dishwashers are controlled by electro-mechanical controllers. The machinery in a factory working on assembly lines is also automatically controlled.

Today PLC has been integrated in household devices for reporting power consumption status.

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Hierarchical control concept with the continuous development of the intelligent load and increasing demand for sensors, and SoC type of product because of its low cost, small size advantage, is the solution to adapt to this development program. Infineon Technologies (China) Limited’s automotive electronics business, said Li Shiming, Senior Marketing Engineer, “a new generation of Infineon SP37 Tire Pressure Monitoring System (TPMS) single-chip solution to conform to this trend, the controller sensing unit, RF transmitter, low-frequency receiver and power supply modules integrated in a chip, the requirement to auto-on-chip. “

TPMS is a comparison of the Chinese market speculation of a concept of fire, but so far only the United States is the world’s law enforcement TPMS country. Since September 2007 all in the United States after Sell The maximum design total mass not exceeding 4536kg of four passenger cars and commercial vehicles are required to install TPMS. Although the voice of TPMS in China has been a long time, but the standard is postponed again and again, the current application is still limited to certain high-end models, but these have not prevented the semiconductor manufacturers a huge investment in this area.

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