When it comes to EMC laboratories, it is a hot topic in the semiconductor industry. Semiconductors are the most widely used in the automotive electronics industry, and the current automobile is also a product of the increasing household allocation rate among consumer products. Therefore, our laboratory construction for the development of these precision semiconductors actually needs to be continuously optimized with the progress of the times. The construction of EMC laboratory is characterized by large investment scale, high technical content, and strong professionalism. Its complexity is much higher than that of other laboratory projects. However, in the face of millions and tens of millions of investment and equipment manufacturers, there are divergent opinions. , Undoubtedly increase the user's selection difficulty and investment risk, what's more, after the completion of the laboratory, there will be sequelae, which will leave irreparable technical defects for future testing work. Therefore, building a professional electromagnetic compatibility laboratory is the goal that every laboratory integration service provider has been pursuing. This type of laboratory needs to pay attention to the content and complexity in the construction, so CEIDI Xidi is doing related science popularization work in this article, and also hopes that more professional knowledge can be absorbed by more laboratory practitioners.

EMC laboratory (Electro Magnetic Compatibility Lab) electromagnetic compatibility laboratory refers to the ability of equipment or system to operate in compliance with the requirements in its electromagnetic environment and not produce intolerable electromagnetic interference to any equipment in its environment. Therefore, EMC includes two requirements: on the one hand, it means that the electromagnetic interference generated by the equipment in the normal operation process cannot exceed a certain limit; on the other hand, it means that the equipment has a certain degree of electromagnetic interference in the environment. The degree of immunity, that is, electromagnetic susceptibility.

The general electromagnetic compatibility laboratory design and construction content/process includes the following seven aspects:

1. Determination of the construction target of the electromagnetic compatibility laboratory

2. Determination of the design plan for the construction of the electromagnetic compatibility laboratory

3. Bidding for the construction of electromagnetic compatibility laboratory

4. Construction of electromagnetic compatibility laboratory

5. Completion and acceptance of the electromagnetic compatibility laboratory

6. Operation and maintenance of electromagnetic compatibility laboratory

7. Other tasks for establishing an electromagnetic compatibility laboratory

The construction of an EMC laboratory is expensive and difficult to modify after completion. Before the start of construction, CEIDI Xidi will remind the project demand unit to fully consider and improve it before starting the construction, including considering the room for technological upgrading in the next 5 years. Usually EMC laboratory planning and design include the following aspects:  

a) Determine the scope of the task of EMC laboratory: EMC research and experiment scope is very wide, from printed circuit board (PCB),   to stand-alone design,   to system. From the perspective of the nature of the task,  some have completed appraisal experiments, or completed pre-tests in production and scientific research,  some have implemented military standards, and some have implemented civilian standards;

b) Determine the main technical indicators of the laboratory: the measurement systems and experimental facilities required for different technical indicators are very different, and the funding gap is very large, so the technical indicators should be provided appropriately, not the higher the better;

c) Determine the best cost-effective implementation plan;

d) Determine advanced and reasonable key technical measures. A successful planning and design should be able to meet the current and future experimental tasks developed and tested in a relatively long period of time; it can complete the main functions while taking into account other functions; the expenditure is reasonable; the laboratory technical indicators are advanced, Foresight and scalability.

The shielded semi-dark room is the most important component in the EMC laboratory. Its performance affects the main technical indicators of the entire EMC laboratory, and the required cost accounts for a large proportion of the entire EMC laboratory.

The overall layout design of the EMC laboratory usually consists of the following units:

a) Shielded semi-dark room

It is a shielded room, the ceiling and 4 side walls are covered with absorbing materials, and the floor is a conductive surface. Mainly used for radiation emission (RE) experiment and radiation sensitivity (RS) experiment.

b) Conduction test room

It is a shielded room, which is mainly used to conduct conducted emission (CE) and conducted sensitivity (CS) experiments.

c) Control room

It is a shielded room where EMI and EMS test systems are placed.

d) Power amplifier room

It is a shielded room where the power amplifier of the RS measurement system is placed.

e) Power distribution room

Provide power for the above a)-d). 

f) Ventilation and air conditioning system

Provide ventilation and temperature control for the above a)-d).

g) Automatic fire alarm system and fire-fighting facilities 

Provide fire alarm and fire-fighting facilities for the above a)-d).

h) TV monitoring system 

Provides TV monitoring and experimental site video recording functions for shielded semi-dark rooms, as well as fire monitoring functions.

i) Load room