Mkb0908 temperature, heart rate and blood pressure monitoring scheme

1. Scheme Description:

1.1 mkb0908 temperature, heart rate and blood pressure scheme (module) realizes:

1.2 automatic gain function;

1.3 wearing status identification: automatic falling off detection, no data output;

1.4 automatic skin color recognition;

1.5 temperature, heart rate and blood pressure output;

1.6 HRV-PNN5；

1.7 PPG and ECG output (optional).

The temperature, heart rate and blood pressure monitoring scheme is mainly composed of 5 chips: 1 yk1801 pulse sensor chip, 1 hr6707 pulse chip, 1 hr6816 gain chip, 1 sfb9712 algorithm chip and 1 wd3703 temperature sensor. According to the circuit diagram provided by us, customers can make PCB boards with an area of less than 18mm * 12mm, and output UART signals of temperature, blood pressure and heart rate serial port, which is easy to extract and use.

The pulse sensor chip uses photoelectric volume pulse oscillography (PPG) to sense and extract the pulse information of human body, and outputs serial port signals such as blood pressure and heart rate through analog front-end chip hr607 + hr6816 and algorithm chip sfb9712.

Wd3703 temperature sensor is connected with sfb9712 algorithm chip through GPIO interface, and outputs temperature data from UART or IIC interface of sfb9712 algorithm chip.

The heart rate and blood pressure monitoring scheme can realize the following functions: temperature measurement, heart rate and blood pressure collection and calculation, pulse wave and ECG waveform output (optional), off wear recognition, human body surface temperature monitoring, hrv-pnn50 output and other human health indicators.

Principle of blood pressure scheme: it mainly monitors the change trend of users' blood pressure through PPG feature cognition, tracking and comparison.

Output mode: serial port or IIC (IIC needs to be reserved by the customer in advance).

Output contents: temperature, heart rate, blood pressure, PPG and ECG (optional), off wear identification, hrv-pnn50, etc.

The user implementation method is simple: the main work is only hardware design and structure arrangement, which reduces the requirements for the CPU of the whole machine and software debugging.

The biggest features of the scheme (module): automatic gain function, off wear identification and off no output; MCU algorithm is used, heart rate and blood pressure algorithm is implanted, and UART signal of serial port is directly output, which simplifies the workload of customers, is simple and reliable, and is convenient for customers to use.

2. Scheme block diagram:

Circuit description:

The whole temperature, heart rate and blood pressure part needs independent and controllable LDO power supply to ensure the purity of the power supply. The reference model is sgm2033.

3. Functional features of the scheme:

◆ small size: customers can make their own PCB board, with an area of less than 18mm * 12mm;

◆ ultra low power consumption. The power consumption of the whole module is less than 7ma. It supports long-time ambulatory heart rate and blood pressure monitoring and gives perfect consideration to other functions;

◆ output contents: temperature, heart rate, blood pressure, pulse wave and ECG waveform (optional), off wear identification, hrv-pnn50, etc;

◆ output mode: Serial uart or IIC signal (IIC needs to be reserved by the customer in advance), and the customer can directly extract temperature, heart rate, blood pressure and other values;

◆ sensitive response, instantaneous output of heart rate, blood pressure and other data;

◆ simple application, customers can directly apply to any platform;

◆ high sensitivity: accurate testing of any part of the human body for any population;

◆ the circuit is simple and there are few peripheral devices, which is convenient for development and design;

◆ customer defined use environment: active monitoring or long-term monitoring;

◆ customized functions: temperature and heart rate monitoring, pulse wave analysis, ambulatory blood pressure monitoring;

4. Unique advantages:

◆ the monitoring scheme realizes: automatic gain function; Out of wear detection, falling off without data output; Automatic skin color recognition.

◆ the algorithm MCU of the intelligent wearable blood pressure test module is embedded with the heart rate and blood pressure algorithm, which directly outputs the UART signal of the serial port, which can be directly extracted and used by customers.

◆ low cost: using the complete set of intelligent wearable blood pressure module scheme provided by yundian high tech, it has high cost performance.

◆ true and reliable: continuous temperature, heart rate and blood pressure measurement is true, reliable and high-precision.

5. Application fields:

It can be widely used in heart rate meter, wristband, bracelet, watch, headset, medical equipment, fitness equipment, etc.

6. Considerate service:

Provide all-round technical support to help customers debug to a satisfactory state.

7. List of key components (mkb0908 nesting):