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Now that vital signs such as heart rate and electrodermal activity can be easily measured with wearable devices, research and development of services using vital sign monitoring (VSM) are increasing, mainly in the healthcare and fitness fields. It's becoming more active.
"I don't have knowledge of sensors and electronic circuits, but I want to develop an application that measures vital signs." "I want to acquire and analyze raw data as easily as possible." I think there are more people who think that they want to.
Here, we will introduce Macnica 's unique evaluation platform that can easily collect the vital signs of 10 or more people at the same time using Analog Devices' Wearable VSM Sensor Evaluation Kit as a recommended solution for those facing these issues. To do.
"VSM Evaluation Platform" that can collectively manage more than 10 sensor terminals
The following challenges exist in the development and research of vital sign measurement applications using optical sensors, biopotential sensors, accelerometers, etc.
<Challenge>
・It takes time to develop an algorithm to calculate vital signs from raw data.
- Typical sensor evaluation boards have exposed parts, making them difficult to handle for evaluation while wearing them.
・You want to collect vital signs from multiple wearable devices at the same time for comparison and evaluation, but you don't want to spend time building an environment.
For those who have these issues, Macnica offers the "VSM Evaluation Platform," which allows vital signs to be collected simultaneously from 10 or more devices using Analog Devices' wearable VSM sensor evaluation kit. doing.
Key features include:
Algorithms for calculating vital signs are available, and raw data can also be obtained
Algorithms for calculating vital signs are provided in the terminal's firmware, so you can immediately start acquiring and evaluating vital signs without having to develop your own algorithms. Raw data before calculation can also be acquired, allowing analysis from various perspectives.
Real-time simultaneous data collection with Bluetooth router
Through Cassia Networks' Bluetooth router, it is possible to collect data simultaneously in real time from multiple sensor terminals. Data from multiple terminals can be efficiently aggregated without the need to import data from each terminal via Bluetooth or USB.
Terminal management and batch data display by web browser
An application developed by Macnica as a third party processes the data collected on the server. Terminal management and bulk data display are realized using a web browser. Information from all devices is displayed on one screen, making it easy to compare and evaluate results from multiple devices.
Summary of VSM Evaluation Platform Features
●Evaluation platform with sensor terminal and Bluetooth gateway
- Multiple sensor devices via Bluetooth Simultaneous connection
- Centralized management by developed application
●Sensor terminal
- ADI EVAL-HCRWATCH4Z
- ADI MAXREFDES103#, MAXREFDES105#
● Bluetooth gateway
- Cassia X2000 Enterprise Bluetooth Gateway
-10+ connections
● Application server
- Microsoft Windows 11 Pro/Home + Ubuntu2.2
(Need to prepare separately)
●Terminal management and data display by web browser
- Setting measurement mode
- Terminal name management by MAC address
- Simultaneous display of raw and algorithmic data:
Time measurement, waveform expansion
- Data can be automatically saved and downloaded in csv format
- Terminal status: RSSI, battery level, sensor connection status
UI image of VSM Evaluation Platform
Terminal connection/setting menu
Data display menu
Compatible with two VSM sensor evaluation kits from Analog Devices
The VSM Evaluation Platform supports two VSM sensor evaluation kits from Analog Devices. Let's take a look at the main features of each.
[Watch type] Vital sign monitoring (VSM) watch “EVAL-HCRWATCH4Z”
This watch-shaped evaluation kit is equipped with optical (PPG), biopotential (ECG), bioimpedance (BioZ), and motion detection sensors and can measure a wide range of vital signs.
Powered by batteries, it allows for continuous monitoring and spot measurements when needed. It can be used for module development, demonstration, and data collection for high-performance VSM applications. In addition to wirelessly acquiring data in real time using Bluetooth, it is also possible to analyze the data acquired offline using the internal Flash ROM.
The software development kit (SDK) includes sample code for Android and Python, making it easy to develop an interface from a device to an application. By using "Application Wavetool" for Windows PCs and "ADI Study Watch" for Android/iOS devices, you can monitor data for each device in real time.
Measurable parameters
・Raw data
-Optical sensor (PPG)
-Biopotential (ECG)
-Biological impedance (BioZ)
-Motion detection
-Skin Temperature
・Built-in algorithm
-Motion Compensation
-Heart Rate
-HR Variability
-Contact state detection (Skin Contact)
-Impedance analysis (BIA)
-Body composition (EDA)
-Pedometer
*The reference design is for evaluation purposes and is not a medical device.
[Wristband type] Health sensor platform "MAXREFDES103#"
This wristband-type evaluation kit is equipped with an optical sensor (PPG), a motion detection sensor, and a calculation algorithm for oxygen saturation (SpO2), heart rate (HR), and heart rate variability (HRV).
Equipped with optical analog front end (AFE) sensor "MAX86141" and biometric sensor hub "MAX32664C" with built-in algorithm to calculate heart rate and SpO2 from PPG signal. Provides highly sensitive measurement and algorithm processing capabilities for developing biosensing applications. In addition to wirelessly acquiring real-time data using Bluetooth, it is also possible to analyze data acquired offline using FlashROM.
The software development kit (SDK) includes sample code for Android, making it easy to develop an interface from a device to an application. The standard evaluation tool "Maxim Device Studio" allows real-time monitoring of measurement results for each device on a Windows PC or Android device.
Measurable parameters
・ Raw data
-Optical sensor (PPG)
-Motion detection
・Built-in algorithm
-Motion Compensation
-Heart Rate
-HR Variability
-Oxygen saturation (SpO2)
-Contact state detection (Skin Contact)
・Application algorithm
-Activity
*The reference design is for evaluation purposes and is not a medical device.
In addition, we are preparing to support the wristband type sensor platform "MAXREFDES105#", which is the same as MAXREFDES103#.
Terminals compatible with the VSM Evaluation Platform
One of the features of these two types of VSM sensor evaluation kits is that they are both wearable and easy to handle.
Proposal - Development steps for vital signs measurement
For example, in the early stage of research and development, it is possible to start measurement with one terminal, and after accumulating a certain amount of knowledge, perform simultaneous measurement of multiple terminals using the VSM Evaluation Platform. We are happy to provide detailed information and a quote upon request.
If you are interested, please feel free to contact us.
Application example
・Biological information monitoring in hospitals and nursing homes
・Activity monitoring in sports gyms
Click here for manufacturer site/other related links
- Ideal for miniaturization and battery drive! AFE (analog front end) for vital sign measurement "ADPD4100"
- Enabling multi-parameter vital signs monitoring systems has never been easier.
- Measurement of vital signs
- EVAL-HCRWATCH4Z data sheet (Various data can be downloaded from here)
- MAXREFDES103 data sheet (Various data can be downloaded from here)
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