To obtain information from the external world, people must rely on their senses. However, when it comes to studying natural phenomena and laws, as well as in production activities, the capabilities of our own senses are far from sufficient. To address this, sensors are needed. Therefore, it can be said that sensors extend human sensory abilities, also known as "electronic senses."

In modern industrial production, especially in automated processes, various sensors are used to monitor and control various parameters during the production process, ensuring that equipment operates in a normal or optimal state, and that products achieve the best quality. It can thus be said that without numerous high-quality sensors, modern production would lose its foundation.

Sensors have already permeated extremely broad areas such as industrial production, space development, ocean exploration, environmental protection, resource surveys, medical diagnosis, biotechnology, and even cultural relic preservation. It is no exaggeration to say that from the vastness of space to the immense oceans, and to various complex engineering systems, almost every modern project is inseparable from a variety of sensors.

It is evident that the technology of sensors plays a significant role in economic development and social progress. Countries around the world place great emphasis on the development of this field. It is believed that in the near future, sensor technology will make a leap forward, reaching a new level commensurate with its important status.