The key to the Internet of Things! Do you really understand the sensor?

"As the eyes, nose, ears, and skin act in the human body, it acts as a role in receiving information from the outside world in hardware." This sentence describes the sensor. Since its invention, it has been used in industrial control and other fields. As an important device front end, the function of the sensor is almost irreplaceable. Sensors have become especially important as they move into the Internet of Things era.

According to a recent report by Transparency Market Research, a US market research firm, the global wearable sensor market will continue to grow at a compound annual growth rate of 45.2% by 2020. Yole Developpement also predicts that demand for MEMS sensor products, which are an important part of sensors, has grown rapidly in recent years, with an average growth rate of 12%-13% since 2014. By 2019, the industry is expected to reach US$24 billion. .

Faced with such a huge market, many manufacturers are stepping up research and development and attacking the city.

What is a sensor

Before we analyze the sensors in detail, we need to understand what sensors are and what areas they can be applied to.

According to the national standard GB7665-87, the definition of the sensor is "a device or device that can be measured and converted into a usable signal according to a certain rule, usually composed of a sensitive component and a conversion component."

That is to say, the sensor is a detecting device, which can sense the measured information, and can transform the detected information into an electrical signal or other required form of information output according to a certain law to meet the information transmission and processing. Requirements for storage, display, recording, and control. It is the first step in achieving automatic detection and automatic control.

There are many kinds of sensors, and there are different applications in different products. For simple mobile phones, there are gravity sensors, acceleration sensors, distance sensors, light sensors, three-axis gyroscopes, electronic compasses, etc., and the future is more likely. There are thermal sensors, temperature sensors, humidity sensors, UV sensors, pressure sensors, and more. It's hard to list them all!

According to the application market, the Internet of Things industry can be divided into intelligent industry, intelligent agriculture, intelligent logistics, intelligent environmental protection, intelligent transportation, smart grid, smart medical, intelligent security, special equipment, smart city, smart home and so on. Yole Developpement data shows that the largest proportion of sensors is consumer applications, with a scale of US$5.9 billion, accounting for 45% of the sensor product market, and is expected to exceed US$10 billion by 2019, with a compound annual growth rate of approximately 11.2%. The fastest growing medical services market will grow from $2.45 billion in 2014 to around $7.2 billion in 2019, with a compound annual growth rate of nearly 30%.

2014 global MEMS sensor application market segmentation

Especially in the field of wearables, the future demand for sensors is exploding. According to IHS, a leading global leader in information, products, solutions and services, the average number of sensors used in a single wearable device will increase from 1.4 in 2013 to 4.1 in 2019, total shipments. It will rise from 67 million to 466 million. An era of sensors is coming.

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