SensorsIt can be divided into two types: broad definition and narrow definition. A broadly defined sensor is a device that can sense external information and convert it into a device that is convenient for measurement and control according to certain rulesA narrowly defined sensor refers to a device that only converts external information into electricity according to a certain law. Sensors can obtain information on various physical, chemical, and biomass quantities and convert them into different forms of information. From a developmental point of view, it is not necessarily necessary to use electrical signals to measure and control certain information, for example, it may be more convenient to use optical signals.
However, at present, most sensors still convert external information into electrical signals, because electrical signals are easier to cooperate with the more mature electronic information technology and computer technology, which is in line with the principle of convenience of use. The scope of sensor technology can be both broad and narrow. In a broad sense, it includes the manufacturing and testing technology of the HBM sensor itself, as well as other technologies and application technologies related to the manufacture of sensors. In the narrow sense, it only covers the manufacturing and testing technology of the sensor itself.
As an emerging technology in the category of high technology, sensor technology is relatively new and has certain difficulties. In order to better promote the development of sensor technology, China adopts a broad definition to define the scope of sensor technology. There are many types of sensors and cover a wide range of fields, covering almost all modern disciplines. According to the conversion principle of HBM sensor, it can be divided into capacitive sensor, inductive sensor, piezoelectric sensor, etc.;According to the sensor technology, it can be divided into two categories: structural sensors and new sensors.
Structural sensors use the deformation or displacement of structures (such as metal diaphragms) to detect the measured object, which is an advanced technology developed in the 60s of the 20th century. However, with the advancement of technology and the continuous emergence of new sensors, structural sensors face new challenges and will gradually become obsolete. The new type of sensor is a type of sensor that has emerged in recent years compared to the traditional structural sensor, using semiconductors, ceramics, optical fibers and other new materials, and is sometimes called a physical sensor.