Miniature multifunctional biomedical sensor engineering--BioSensor

The core of the BioSensor project is an integrated multi-parameter health monitoring module designed by us. It measures and tracks processes including HR (heart rate), ECG (electrocardiogram) and SPO2 (blood oxygen saturation) that are currently common on the market. It also supports RESP (respiration rate), GSR (electrodermal activity), human body impedance (such as BIA) Body composition such as body fat), EMG (myoelectricity), weight, body temperature, EEG (electroencephalogram) or other types of sensor signals (such as piezoelectric sensors for non-contact heart rate, respiration and body movement measurement) access.

Currently, the single-chip solution for wearable multi-parameter health collection on the market mainly supports three hardware functions: HR (heart rate), ECG (electrocardiogram) and SPO2 (blood oxygen saturation); such as TI, ADI, MAXIM and MTK. of chips. However, for human health assessment, it is far from enough to analyze only these three functional data. Therefore, we developed this sensing module BioSensor with richer functions. BioSensor can be applied to watches (rings), mobile phones or any other smart health and medical devices. The main hardware functions of BioSensor are as follows:

1. Integrated red (660nm), green (530nm) and infrared (940nm) light transceiver sensing to realize PPG related applications, such as heart rate, blood oxygen, blood pressure trend, etc.;
2. Supports access to up to 8 electrodes to realize applications related to human body electrical and impedance activities, such as ECG, EMG, EEG, respiratory rate, electrodermal activity, analysis of human body fat composition, etc.;
3. Embedded medical temperature sensor with an accuracy of 0.1 degrees Celsius, used for body temperature measurement, etc.;
4. Embedded biosensing analog front-end supports access to various types of special sensors, such as piezoelectric films (for non-contact heart rate, respiration and body movement measurement), weighing and other sensors;
5. MCU/DSP unit with 24-bit ADC, the running algorithm core can complete data analysis such as filtering and comprehensive human health management;
6. Hardware interface supports I2C, SPI or UART;
7. 13.8x10.6mm ultra-small size, suitable for bracelet (watch) applications, and can be customized.

BioSensor’s advantages: complete software and hardware open source platform:

For the application and evaluation of BioSensor, we provide a complete software and hardware open source platform. As shown in the figure below of the hardware reference evaluation framework, the hardware evaluation board currently supports mainstream MCUs such as STM32, ESP32 or NRF52;

The hardware evaluation board consists of two parts:

1>**BioSensor module interface board** (as shown below).       

2>**BioSensor main control board** (as shown below).

Evaluate open source software:

In terms of software, we provide an open source framework HDF (Healthcare Development Framework), the open source hosting address is  https://github.com/feelkit/HDF ;

It also provides Bluetooth firmware applications based on NRF52, open source hosting address  https://github.com/feelkit/bioModule_NRF52_BLE ;

On the PC side, an open source evaluation software package based on Labwindows CVI is provided, and the open source hosting address is https://github.com/feelkit/bioDemo_labwindows_cvi ;

An Android-based evaluation APK is also under development. Based on this project, we will continue to provide more innovative health and medical applications.

Video operation: Please refer to the link---- https://v.youku.com/v_show/id_XNDM3MTU3OTYyNA==.html?sharefrom=iphone&sharekey=726892ea5c4af67e0eefaa20bad668c70