Since the birth of the sensor in the 1860s, it has been more than 150 years. Now with the rapid development of the Internet of Things industry, more and higher requirements are put forward for sensor technology.
Sensors are regarded as an important enabling technology for the Internet of Things. In 2017, the global sensor market will reach US$4 billion, and by 2021 it will reach US$65 billion. MEMS sensors are an important growth point. During the Munich (Shanghai) Electronics Show, Bosch Sensortec highlighted three products: BMA400, BMI085, and interactive projection modules.
During the conference, the author was fortunate enough to interview the head of Bosch Sensortec MEMS products.
Mr. Ralf Schellin discussed the future of IoT sensors and other related issues.
Mr. Ralf Schellin, Head of Bosch Sensortec MEMS Products
Intelligence - scenario needs upgrade
Evolution of three major categories of sensors
The huge growth space of IoT wearable devices, AR\VR, smart home appliances, smart industries, robots, drones, etc. brings opportunities for various types of sensors, including inertia, pressure, temperature and humidity, and gas sensors. As the world's largest supplier of MEMS sensors, Bosch currently ships about 1.5 billion units a year, with approximately 5 million chips per day, with an average market share of around 40%. Founded in 2005 by Bosch Automotive Electronics' MEMS Sensors division, Bosch Sensortec specializes in providing MEMS sensor applications for consumer electronics. From the beginning of the mobile phone market to the MEMS products for wearable devices, and now optimistic about IoT market opportunities, Bosch Sensortec has been at the forefront of the market, exploring the future of IoT sensors and experiencing different stages of the scene. And these requirements correspond to the three major categories of sensors.
The first category is a sensor with specific functions.
Leopold Beer, president of Bosch Sensortec Asia Pacific, said that this type of sensor has a simple interrupt mechanism, which is mainly used for relatively simple application interfaces, such as picture stabilization, horizontal screen vertical screen or the use of some games, most of which are native data. As soon as the sensor is detected, a data is provided to allow the design engineer to design the application.
The second category, pre-programmed sensors.
As applications are upgraded, sensor diversification needs are not met by a simple interruption, and pre-edited features need to be embedded. For example, the use of pedometers in the bracelet, the application of tap recognition, these require a pre-programmer to optimize for complex usage scenarios.
The third category, the "AI" sensor.
Customization - fragmentation market hits
Three core products highlight the power of technology
Ultra-low power and high performance combined BMA400
Open the VR/AR smart world door BMI085
The BMI085 is a high-performance 6-axis inertial measurement unit (IMU) BMI085 that combines a 3-axis 16-bit MEMS accelerometer with a 3-axis 16-bit MEMS gyroscope for demanding VR, AR and other applications. Such as navigation, body/human motion tracking and high-end games. The compact MEMS sensor package combines features such as extremely low drift gyroscopes and low noise accelerometers to significantly reduce unpleasant motion sickness. Its ultra-precise transient detection of head motion shortens the time delay to an almost imperceptible minimum. As a result, electronics manufacturers are able to create more realistic and immersive virtual and augmented reality experiences, enabling headset users to integrate into virtual environments for longer periods of time without having to rest frequently.
Ralf Schellin further stated that the extremely low latency of the new BMI085 enables headset manufacturers to eliminate image drift and provide a realistic real-world experience. The IMU offers low motion to photon delays of less than 3 ms and is capable of near perfect stability in high temperature fluctuations often encountered in continuous head mounted displays (HMD) or augmented reality headset scenarios. This system further enhances accuracy and is critical for today's lightning-fast HD augmented reality/virtual reality applications.
Flexible interactive projection module
The interactive projection module mainly provides a more flexible use of the interactive interface, so that the use of the Internet of Things can be more diversified. The product uses Bosch's exclusive MOEMS laser scanning technology for projecting and sensing interactive images. It enables focus-free laser projection and the flexibility to transform any surface into a particularly intuitive and visually appealing virtual user interface (UI) that is ideal for use with home appliances, smart speakers, augmented reality glasses, wearables, etc. use.
In fact, it is an interactive projection module based on a micro-scanner. It is an optical micro-system with a size of roughly 7mm, a width of 30mm and a length of 30mm (reference design size). Its main feature is the focus-free, laser-side technology, which scans each point directly through the laser, performs automatic docking, can be projected on different geometric surfaces, or even at any different distance (Leopold Beer says, “Because it is The interface of the networked device does not need to be far away; in addition, the distance can be upgraded by the laser module, and the laser module of the higher power can be made clear and variable, but this will hurt the eyes.)
Convergence - technology with innovative applications
Technology integration and market demand feedback
As we all know, in the field of MEMS Sensors, Bosch is the world's largest supplier. Faced with the saturation of the mobile phone market and the market opportunities and challenges of the continued growth of the Internet of Things, Bosch is well prepared to upgrade and transform. Leading MEMS products to upgrade to integrated solutions such as embedded software and algorithms, integrated sensor combinations, customized and intelligent products to the path of convergence.
The integration of Bosch Sensortec is reflected in two aspects: one is technology integration and innovation, and the other is the integration of multi-faceted market demand, which further defines products and promotes market-oriented applications.
In the interview, Ralf Schellin said that at present, IoT sensors have seen three major trends in technology integration:
First, the integration of Sensors and Sensors. For example, the integration of accelerometers and gyroscopes, even the integration of cross-type sensors, such as the integration of inertial sensors, environmental sensors, optical sensors.
Second, the integration of Sensors with MCUs or algorithms. Their integration will provide customers with a lower power consumption and smaller modular product, which is convenient for users to develop flexibly.
Third, the integration of Sensors and wireless communication modules. For example, the integration of modules such as Zigee, Lora, and Bluetooth facilitates data transfer between sensors at the edge, thereby facilitating the intelligent processing of the edge of the Internet of Things system.
On the other hand, Bosch is a large group with about 400,000 employees in more than 60 different countries. There are four business divisions: automobile and smart transportation, industrial technology, energy construction, and consumer goods. In 2017, it achieved sales of more than 7.8 billion euros.
to sum up
As a carrier for receiving information from the outside world in the Internet of Things, the sensor is the front end of the important sensing layer. The sensor will usher in a high-speed development period with the popularity of the Internet of Things. With the continuous exploration of advanced sensor manufacturers such as Bosch and the continuous maturity of artificial intelligence, VR\AR, edge computing, blockchain and other technologies, the sensor will be the first to open the Pandora's Box of the Internet of Things.
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