Murata's Interpretation of the Smart Life Theme at the 2014 Hi-Tech Fair
From November 16th to 21st, Murata Manufacturing Co., Ltd. (hereinafter referred to as Murata) participated in the eighth high-tech fair electronic exhibition with the theme of "to the life 'smart' future". In addition to Murata's star ambassador, Murata, the young boy and his younger sister, Wan Tong, came to the Fair again. They also displayed technologies and products in four major areas: wearable / smart medical, Internet of Things, mobile and communication, and capacitors. The advancement of science and technology is to improve people's lives, especially with the development of wearables and the Internet of Things, the connection between technology and people's lives is getting closer and closer. The future of intelligent life needs to be achieved through the power of technology. At the same time, intelligent life is technology The source of motivation for corporate growth.
"Proactive prevention" sensors
Wearable devices are becoming more and more popular nowadays, and they are becoming more and more accepted by consumers. They are widely used in health care and other fields. They can monitor people's daily physiological data and provide an important basis for predicting health conditions and taking preventive measures. This application is in line with Murata's "active and intelligent life" concept and has become Murata's key display link at this exhibition.
In the Murata Stage Performance Area, borrowing the mountain climbing stories performed by Murata Boys and Murata Wando, the host used a Murata concept bracelet to complete a series of indicators such as body temperature, heart rate, and height of movement to show the audience that wearable devices are integrated into the future. The scene of life also showed Murata's integrated solution of sensing technology, communication technology and power management applied to wearable devices.
According to Murata technical manager Deng Shaoneng, "active prevention" and "micro-delicacy" have always been the development direction of smart medical solutions advocated by Murata. Based on this concept, Murata integrated ultra-compact light sensors, flexible film temperature sensors, and high-precision MEMS pressure sensors into the concept bracelet. The light sensor encapsulates the light-emitting element and the light-receiving element together to achieve miniaturization. It has a digital output function and uses optical plethysmography to monitor the heart rate by changing the rate of light absorption. Applying it to wearable devices, users can know the heart rate status at any time by measuring the fingers, behind the ears, or the wrist, and realize the active prevention of cardiovascular disease. Based on the development trend of multi-function and "micro" volume, wearable products have requirements for small components, low power consumption, and high accuracy. In response to this market development demand, Murata incorporates a thin-film temperature sensor in the concept bracelet. It uses Murata SMD NTC thermistors and FPC (Flexible Printed Circuit) with a thickness of about 100 μm to take advantage of miniaturization technology (length can be 10mm ~ 70mm customized, thickness is only 0.55mm), at the same time, its flexibility is good, and can be flexibly routed in complex structures and narrow spaces. Compared with ordinary metal wire type temperature sensors, Murata's thin film temperature sensors have good temperature measurement accuracy and sensitivity, and can achieve temperature monitoring with an error of not more than 0.4 ° C in the shortest time. When the product is used to monitor body surface temperature in wearable devices, it can ensure the accuracy of the measurement, and help users shorten the monitoring time and improve efficiency. Another MEMS pressure sensor uses Murata Finland's electrostatic capacitance type MEMS technology with built-in temperature compensation, which is not affected by temperature changes and reduces the noise level by 0.5Parms. The product can be converted into altitude by measuring the change of the air pressure value, and combined with GPS navigation can achieve functions such as accurate positioning and indoor navigation. At the same time, it can analyze the measured air pressure value and collect meteorological data. To further expand the application of this product, it can be combined with other sensors to accurately determine the wearer's movement mode (flat ground or climbing movement, etc.) according to the change in air pressure value, so as to more accurately calculate the actual calories consumed.
Combining development of sensing and communication technology
The Murata concept bracelet can quickly and accurately collect information. Of course, thanks to the integrated sensors and stable and low-power transmission of data, you need the support of wireless communication modules and other components. In terms of wireless communications, Murata introduced ultra-compact, low-power Bluetooth Smart modules, Bluetooth / WiFi modules, NFC antennas, RFID tag modules and other components. The size and power consumption of the Bluetooth Smart module is only 1/4 of Murata's previous products. It is an easy-to-mount connection type and built-in antenna, which can greatly reduce the resources that customers need to invest in RF design. Murata's module is currently the world's smallest low-power Bluetooth module.
Based on the combination of sensors and low-power wireless modules, Deng Shaoneng introduced the latest progress of the "Body Area Network (BAN)" concept at the "Wearable Device Industry Chain Development Forum" held concurrently with the exhibition, pointing out the so-called The human body area network is a kind of network attached to the human body. It can be composed of a set of small and movable sensors with communication functions and a body master station (or BAN coordinator). The sensor can be worn on the body or implanted in the body to monitor various physiological information of the human body, including blood pressure and joint conditions. Human body area network technology will be widely used with the development of health care and miniaturization and low power consumption of electronic products.
With the current stimulus and promotion of wearable devices being market-focused, wearable, implantable, invasive and other health monitoring devices that serve people will accelerate their introduction to the market. Products such as blood oxygen sensors worn at the fingertips, watch-type blood glucose sensors, watch-type sleep quality measuring devices, sleep physiological checkers, and implantable identification components have now appeared on the market. If there is no body area network, these sensors can only work independently. Therefore, the human body network is expected to further develop rapidly.
New application of piezoelectric thin film actuators
Murata's piezo film actuator keyboard using piezo film technology displayed in the mobile and communication exhibition area illustrates another level of "smart life". Piezo film actuator is composed of a vibration plate and a piezoelectric film. The up and down vibration of the vibration plate is controlled by the contraction and extension of the film, thereby transmitting the feedback signal. The response is more sensitive and thinner than common eccentric motors and resonators. Applying it to the keyboard can quickly feedback the tactile signals to the human body, making the keyboard lighter, thinner and more convenient to use. According to the booth staff, the keyboard thickness is only 1.5mm ~ 2mm, and the power consumption does not exceed 100mW. Considering the ultra-thin and high-sensitivity design, this technology is suitable for equipment requiring large area vibration.
Editor-in-chief: Su Yan