Abstract: Wearable devices pay great attention to the small size, users should be unbound when using, and even forget to carry a device. Therefore, the components on the wearable device should be as small as possible, the integration level should be improved as much as possible, and the power consumption should be reduced at the same time, which is the wearable device that the user is really willing to use daily.

       In the past two years, both smart home and wearable products have brought a lot of interesting use systems, and "monitoring" is one of the key points. Wireless cameras, thermostats, smart scales or sports bracelets all have their own areas of monitoring, making people's lives easier. With the development of Internet of Things technology and the maturity of the market, users have higher and higher requirements for monitoring equipment, not only limited to functions, but also more urgent for personal customization.

With the continuous development of core sensors, more complex and multi-faceted monitoring forms will be the new market trend, and air quality monitoring is one of them. By carrying more advanced sensors, dust particles, carbon dioxide, and volatile organic compounds (such as acetone, benzene, etc.) in the air can be monitored, making the performance more powerful. Monitoring the surrounding air quality anytime, anywhere, making the ultimate shape of air monitoring equipment will be wearable. At the same time, through Bluetooth, the data can be sent to the smart phone in time to remind users to pay attention to air quality and do a good job in avoiding and dealing with it.

However, to do this, we will face some difficulties in the selection of sensors, including:

1) In order to meet the user "wear" "wear" requirements, wearable devices must be small enough, light enough weight. Therefore, the space for installing the battery inside the wearable device is very small. If the battery needs to be charged or replaced frequently, the user will undoubtedly question the value and function of the device. Then, the entire circuit should consume as little power as possible when the device is running, and the power saving mode should be turned on when the device is not running, so the sensor needs to achieve low power consumption.

2) Wearable devices are mainly for people to "wear" and "wear", that is to say, they will continue to transfer with the movement of people, including changes in ambient gas composition, temperature, humidity, vibration, etc., which will affect the function of the device. Therefore, the front-end sensor components are required to have good adaptability and stability.

3) In addition to good basic performance, the sensor must ensure other advantages, such as higher integration and miniaturization, higher sensitivity, and longer life.

In the future, sports bracelets and monitors need to be equipped with more functions in addition to counting steps and monitoring heart rate, especially for monitoring the environment and air. Sensors that are smaller and can monitor more harmful gases will become more popular. However, although the regular semiconductor sensor is small enough, it is still much larger for wearable devices, and the power consumption is completely unable to guarantee the long-term use of smart devices.

In the face of these needs and trends, Figaro, Japan (FIGARO) The company has developed and launched an air quality detection sensor suitable for smart wearable devices.TGS8100, can detect smoke in the air,VOCsThe air quality of the current environment is fed back in real time to remind the user to pay attention to the air quality.

TGS8100is a new typeMEMSSemiconductor oxide sensors, based on cutting-edge micro-electromechanical systems (MEMS) Technology and rich experience in the field of metal oxide gas sensors, Figaro has successfully developed a new type of indoor air quality sensor with very low power consumption and very small volume. Due to excellent durability and stability,TGS8100It has increasingly become an ideal product for home and office environments such as air purifiers, air conditioners and ventilation equipment start-up, and can be perfectly applied to smart wearable devices. 。

Typical characteristics of the sensor:

Surface patch package;

Low power consumption;

Highly sensitive to cigarette smoke, kitchen fumes and gaseous air pollutants;

 Long life;

low cost

among them,The small size and low power consumption of the sensor (approx.15mW），The air quality sensor is enabled for smart wearable devices.