The wide application of sensors and the Internet of Things has driven the development of human society.

The word sensor is an authoritative interpretation: the sensor is a detection device that can feel the information being measured, and can transform the felt information into an electrical signal or other required form of information output according to certain laws to meet the requirements of information transmission, processing, storage, display, recording and control. This explanation is troublesome and difficult to understand, compared to this, Xiaobian prefers to see the sensor as an extension of the five senses.

Electrical features - classification of sensors

The sensor is an extension of the five features of the human body and an upgraded version of the human senses. In order to obtain information from the outside world, people must use sensory organs such as ears, nose and mouth, but the more rapid the pace of technological progress, the more we will find that human capabilities are limited. In order to cope with this situation, sensors have to be used to monitor the growing number of environmental factors. The application of sensors can more accurately and clearly show the environmental factors that people can not judge through the form of data.

According to the specific function and practical application of the sensor, the sensor is divided into resistance type, resistance strain type, piezoresistive type, variable frequency power, thermal resistance, laser, Hall element sensor seven categories. Among these sensors, most of the functions of the sensors can correspond to the human sensory organs.

Temperature/humidity/sensitization/liquid sensors - Tactile

Gas sensor - Smell

Light sensor - Vision

Acoustic sensors - Hearing

Chemical sensor - Taste

Due to the deployment of a large number of sensors, each sensor is an information source, equivalent to a sense of touch, different categories of sensors capture different information content and information format, the data obtained by the sensor is real-time, periodically collect environmental information according to a certain frequency, and constantly update the data. However, there is no sensor relying on the Internet of things, the monitoring data can only be displayed on the spot, each device is independent of each other, the staff records the data by hand, and it is impossible to comprehensively analyze the data systematically. The function of the Internet of Things is to connect all the sensors in series and analyze the uploaded data comprehensively. The Internet of Things is undoubtedly an epoch-making invention for all industries, allowing sensors that were originally only in industry to play an auxiliary role to be spread all around life.

Nervous system - Internet of Things

If the Internet of Things is the nervous system, then the sensor is the nerve endings of the Internet of things, it is not only the core components of human perception of the outside world, but also the core components of everything to perceive each other, the more development of science and technology, the higher the sensitivity of the sensor. The existence and development of sensors, so that the object has the sense of touch, taste and smell, so that the object slowly become alive. Large-scale deployment and application of various types of sensors, including intelligent industry, weather monitoring, smart home, dust monitoring, intelligent medical treatment and so on. This is equivalent to assigning a nervous system to the world, and with this nervous system, the whole world is of course more spiritual.

Sensor technology, RFID tags, embedded system technology is the three key technologies to achieve the Internet of Things!

Manage these big data through the Internet, and then manage the people, machines and equipment in real time through a super powerful central computer group, such as cloud computing. This will achieve the integration of human and physical systems, so that human production mode and life can be more precise, accurate and dynamic, to achieve the intelligent state of all things.

At present, the application of sensor technology and the Internet of Things plays an important role in economic development and social progress. Countries all over the world attach great importance to the development of this field. Sensor technology based on the Internet of Things will undoubtedly reach a qualitative leap and a new level.