< 概要>
ROHM, a world-famous semiconductor manufacturer, has developed a photoelectric pulse sensor 'BH1792GLC' that enables high-speed sampling at 1024 Hz and pressure measurement and blood vessel age measurement for wearable devices such as smart watches and smart wristbands.
'BH1792GLC' is ROHM Pulse Sensor's second generation new product which is highly praised for its 'high accuracy' and 'low power consumption'. Its low power consumption achieves the industry's smallest level of power consumption of 0.44mA (measurement of pulse rate). It helps to drive the application for a longer time. In addition, it supports high-speed sampling at 1024 Hz. Compared with the conventional products, the pulse measurement speed is as much as 32 times faster, which satisfies the vital signs such as pressure measurement and blood vessel age measurement that require high-speed sampling. Times demand.
This product was sold in September 2017 (sample price: 700 yen/set: not included in tax). It is estimated that it will be put into mass production with a monthly output of 500,000 in December 2017. The production base of the previous process For ROHM Apollo Co., Ltd. (Fukuoka, Japan), the production process for the later process is ROHM Electronics Philippines Inc. (Philippines). In addition, the pulse sensor for the sensor expansion board of the general-purpose microcontroller development board 'Arduino Uno' can be connected. The evaluation board 'BH1792GLC-EVK-001' has also been launched in two online sales platforms, AMEYA360 and RightIC, since March 2018. In the future, ROHM will continue to be developed in the field of wearable devices with increasingly popular applications. Safe, comfortable social products.
< 背景>
In recent years, with the improvement of people's health awareness, in order to achieve care and staff health management, wearable devices are no longer required only for pulse rate measurement, but also wish to measure various vital signs including pressure and blood vessel age. The demand is increasing. To measure complex vital signs, you need to increase the sampling frequency and increase the number of measurements per unit of time. However, there is a problem of increased power consumption and shortened application driving time.
ROHM has used its unique infrared removal technology and accumulated technical experience in the field of photosensors to develop a low-power pulse sensor that can measure with high accuracy even in strong infrared environments such as sunlight and strong sunlight. ROHM further optimizes these technologies and develops high-speed sampling pulse sensors that meet the needs of the times.
< 特点详情>
1. Supports vital signs measurement, meets the needs of the times and achieves 1024Hz high-speed sampling, which can meet the needs of complex vital signs measurement such as pressure and blood vessel age measurement. In addition, this product also has built-in infrared sensor for determination, wearable equipment The sensors needed are all available, which greatly contributes to the simplification of the system.
2. Using ROHM's unique optical filters to achieve high-precision detection
The photoreceptor consists of an infrared cutoff filter and a Green filter. ROHM's unique optical filters that only penetrate green wavelengths are used, successfully reducing the influence of infrared and infrared light interferences to less than 1/10 of that of general products. This enables high-precision pulse measurement under intense movements such as sports and strong infrared rays such as sunlight.
3. Realize the industry's smallest level of low power consumption, which helps the application of long-term drive
By selecting an external green LED (ROHM-produced 'SMLMN2ECT') that is ideally suited to the sensitometric properties of the pulse sensor and optimizing the optical design, the industry's smallest level of low-consumption current of 0.44mA is achieved (when measuring pulse rate).
In addition, new FIFO (First in First out) functions for reducing the power consumption of the HOST (microcontroller) are incorporated as compared with the conventional products, and the power consumption of the pulse sensor and the microcontroller is reduced, and the application can be realized for a long time. drive.
4. The very popular sensor expansion board is synchronised with the evaluation board, making it easier and easier to import
In sync with the sample sales of this product, it is possible to connect the sensor expansion board 'SensorShield-EVK-001' of the universal microcontroller development board 'Arduino Uno' with the pulse sensor evaluation board 'BH1792GLC-EVK-001' Two online sales platforms AMEYA360 and RightIC start selling.
At the same time, the various documents and software required to use the evaluation board to verify physical signs can be downloaded from the following web page. http://www.rohm.com.cn/web/china/sensor-shield-support/heart-rate- Sensor2
< 应用例>
● Smart bracelets, wearable devices such as smart watches ● Smartphones ● Other devices that require vital signs data