CN220801016U - Electrocardiogram acquisition device based on wireless transmission - Google Patents

Abstract

The utility model provides an electrocardio acquisition device based on wireless transmission, which comprises: the system comprises an analog front end, a microprocessor and a Bluetooth module; the analog front end is connected with the microprocessor, and is used for collecting dual-channel electrocardio analog signals and sending the signals to the microprocessor; the microprocessor processes the electrocardio analog signals to obtain electrocardio digital signals; the Bluetooth module is connected with the microprocessor and used for transmitting the two-channel electrocardio digital signals. The wireless transmission of data is realized, and repeated wire plugging is not needed.

Description

Electrocardiogram acquisition device based on wireless transmission

Technical Field

The utility model relates to the field of electrocardiograph monitoring, in particular to an electrocardiograph acquisition device based on wireless transmission.

Background

Heart disease is sudden and unpredictable and is a large killer threatening human life. According to the daily-encountered electrocardiographic monitoring system, a large electrocardiographic detection workstation is seen in a hospital, and the workstation has great advantages in processing speed, storage capacity and analysis capacity. But the large-sized workstation has larger volume, high price and strong professional performance, does not have wireless transmission capability, limits the wide application in home health care and community service, and the wireless electrocardiograph monitoring system can timely acquire electrocardiograph information of patients so as to timely discover abnormal conditions, and adopts corresponding treatment measures, thereby being one of effective means for reducing the death rate of heart diseases.

With the advancement of science and technology and the development of human society, the development of global medical instruments is also a daily change. With the improvement of living standard and health consciousness, people need to monitor the health of the heart at any time and can diagnose and treat the heart in time under the condition of relatively critical conditions. Therefore, the development of the wireless electrocardiograph monitoring system has very important significance.

The automatic, excitatory and conductive properties of electrocardio are all based on bioelectricity. Changes in cardiac electrical activity are closely related to the occurrence of certain cardiac diseases, particularly various types of arrhythmias. Electrocardiogram is a record of the electrical activity of the heart and has important value in resolving the rhythmic changes and conduction conditions of the heart.

Therefore, there is a need in the art for a wireless electrocardiographic monitoring system that is small and convenient to use.

Disclosure of utility model

The present utility model has been made in view of the above problems, and it is an object of the present utility model to provide an electrocardiographic acquisition device based on wireless transmission that overcomes or at least partially solves the above problems.

According to one aspect of the present utility model, there is provided an electrocardiograph acquisition device based on wireless transmission, the electrocardiograph acquisition device comprising: the system comprises an analog front end, a microprocessor and a Bluetooth module;

The analog front end is connected with the microprocessor, and is used for collecting dual-channel electrocardio analog signals and sending the signals to the microprocessor;

the microprocessor processes the electrocardio analog signals to obtain electrocardio digital signals;

The Bluetooth module is connected with the microprocessor and used for transmitting the two-channel electrocardio digital signals.

Optionally, the analog front end adopts an ADS1292R medical ADC chip for acquiring dual-channel electrocardio analog signals;

and sending the electrocardio analog signal to the microprocessor through an SPI bus.

Alternatively, the microprocessor uses STM32F103C8 as the master controller,

And the STM32F103C8 reads the electrocardio analog signals of the ADS1292R through an SPI bus, and performs AD conversion on the electrocardio analog signals to obtain the electrocardio digital signals.

Optionally, the STM32F103C8 transmits the electrocardiographic digital signal to the bluetooth module through DMA; transmitting the data to an upper computer through the Bluetooth module;

And the upper computer displays and stores the electrocardiosignals in real time.

The utility model provides an electrocardio acquisition device based on wireless transmission, which comprises: the system comprises an analog front end, a microprocessor and a Bluetooth module; the analog front end is connected with the microprocessor, and is used for collecting dual-channel electrocardio analog signals and sending the signals to the microprocessor; the microprocessor processes the electrocardio analog signals to obtain electrocardio digital signals; the Bluetooth module is connected with the microprocessor and used for transmitting the two-channel electrocardio digital signals. The wireless transmission of data is realized, and repeated wire plugging is not needed.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an ADS1292R pin diagram provided in an embodiment of the present utility model;

Fig. 2 is a diagram of an hc_05 bluetooth pin provided in an embodiment of the present utility model;

Fig. 3 is an STM32F103C8 pin diagram provided by an embodiment of the present utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The terms "comprising" and "having" and any variations thereof in the description embodiments of the utility model and in the claims and drawings are intended to cover a non-exclusive inclusion, such as a series of steps or elements.

The technical scheme of the utility model is further described in detail below with reference to the accompanying drawings and the examples.

Firstly, a standard electrocardio three-lead electrode plate is used for collecting two-channel analog signals, and an electrocardio digital signal is obtained by utilizing a 24-bit analog front end ADS 1292R. The digital signal is transmitted to a microprocessor taking STM32F103C8 as a core through an SPI interface. The microprocessor carries out relevant control on the ADS1292R through the SPI bus, and the method comprises the steps of receiving and AD converting a received analog signal, simultaneously transmitting a digital signal to the Bluetooth module through DMA, transmitting the digital signal to the upper computer through the Bluetooth module, and displaying and storing electrocardiosignals in real time by the upper computer, so that convenience is provided for further analysis and research.

As shown in fig. 1, the internal registers of the ADS1292R can perform main functions such as changing the input mode, amplification, sampling rate of the signal. The ADS1292R is initialized prior to acquiring the electrocardiographic data.

Firstly, pulling up the DRDY pin, and powering up the inside of the chip; and pulling down the RESET pin, resetting the chip, pulling down the CS pin, and selecting the SPI interface. Then send SDATAC command and WREG command, configure CONFIG1, CONFIG2 registers and registers for each channel, set additional functions. And finally, data sampling is carried out, ADS1292R waits for reading, and the initialization flow is finished.

ADS1292R communicates with the microprocessor through SPI interface to realize synchronous receiving and transmitting of data. The SPI communication of ADS1292R is four-wire including clock signal SCLK, data input line DIN, data output line DOUT, and chip select line CS. ADS1292R can only operate in a slave mode of SPI communication.

STM32F103C8 is operated in SPI main mode, and is mainly responsible for configuring on-off of each input end of ADS1292R, setting up the register of ADS1292R, the amplification factor of programmable amplifier PGA and the value of sampling frequency. The programmable amplifier PGA in this system has a 1 amplification factor and a 500Hz sampling frequency. After detecting the DRDY falling edge signal, the singlechip starts to read the digital signal converted by the ADS 1292R.

The utility model makes electrocardiosignals carry out analog-to-digital conversion on signals through an ADS1292R integrated chip, then the signals are connected to an STM32F103C8 singlechip through SPI protocol transmission, the STM32F103C8 singlechip processes the data, the processed data is transmitted to a Bluetooth module HC_05 through DMA, the Bluetooth module HC_05 transmits the data to a DAC module connected to a PC, the data is converted into analog signals and transmitted to the PC, and a visualized electrocardio pattern is generated after the filtering one process of the PC.

As shown in FIG. 3, STM32F103C8 is an Integrated Circuit (IC) of an embedded microcontroller, the core size is 32 bits, the main frequency speed is 72MHz, the program memory capacity is 64KB, the program memory type is FLASH, and the RAM capacity is 20K.

The resources owned by STM32F103C8 include: 6-20KB SRAM, 32-128KB FLASH, DMA controller (total 7 channels), 2 SPIs, 7 timers (3 16-bit timers, motor control PWM timers, 2 watchdog timers (independent and window), sysTick timers of 24 bits), 9 communication interfaces.

STM32F103C8: STM32 represents a 32-bit microcontroller of ARM Cortex-M3 core. F represents a chip sub-series. 103 represents an enhanced series. The term C represents pin count, where T represents 36 pins, C represents 48 pins, R represents 64 pins, V represents 100 pins, and Z represents 144 pins. 8, wherein 6 represents 32K bytes Flash,8 represents 64K bytes Flash, B represents 128K bytes Flash, C represents 256K bytes Flash, D represents 384K bytes Flash, and E represents 512K bytes Flash.

SPI function of STM32F103C8

1. SPI communication:

SPI, serial peripheral interface. SPI is a high-speed, full duplex, synchronous communication bus to occupy four lines on the pin of chip, practiced thrift the pin of chip, save space for the overall arrangement of PCB simultaneously, provide the convenience, just because this kind of simple easy-to-use characteristic, more and more chips have now integrated communication protocol.

SPI has the signal line few, and the agreement is simple, and the data rate is high advantage. The data transfer rate is up to a few MB/s. The maximum clock frequency for SPI communication by STM32F103C8 is 18MHz.

2. SPI communication pin introduction:

Standard SPI uses 4Pin for data transfer:

(1) MOSI-master data out, slave data in.

ADS1292R transmits the sampled digital signal to STM32F103C8 through SPI interface, and STM32F103C8 processes the data (format conversion) and then transmits the processed data to HC_05 through DMA for further processing.

As shown in fig. 2, the bluetooth module BT-hc_05 is a high-performance bluetooth serial module.

The Bluetooth module can be used for pairing various computers, bluetooth hosts, mobile phones, PDAs and PSP intelligent terminals with Bluetooth module BT-HC_05 module functions.

The wide baud rate is in the range of 4800-1382400, and the module is compatible with a singlechip system.

After the two Bluetooth modules in the master-slave mode are successfully paired, the wireless Bluetooth module can be changed into a wireless Bluetooth module.

And (3) data processing: one HEX (hexadecimal) byte of the converted data is converted into two ASCII codes for transmission. One frame data includes a frame header (4) +valid data (4*2) +checksum (1), 13 bytes in length.

The beneficial effects are that: the portability, the prior electrocardio acquisition system with the wire prevents the free movement of a patient, and the signal acquisition of the electrocardio system with the wire can possibly generate bad contact and other influences due to the movement of the patient. The system changes the wired transmission into wireless transmission, thereby facilitating the activities of patients.

From the perspective of doctors, the problem of excessive lead wires on the monitor is avoided, convenience is brought, and repeated wire plugging is not needed.

The monitor appearance becomes more neat and there is not much lead wire wrap.

The anxiety of the patient can be relaxed, and the patient can calm without seeing too many overlong lead wires.

The foregoing detailed description of the utility model has been presented for purposes of illustration and description, and it should be understood that the utility model is not limited to the particular embodiments disclosed, but is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and principles of the utility model.

Claims (3)

1. An electrocardio collection system based on wireless transmission, its characterized in that, electrocardio collection system includes: the system comprises an analog front end, a microprocessor and a Bluetooth module;

The analog front end is connected with the microprocessor, and is used for collecting dual-channel electrocardio analog signals and sending the signals to the microprocessor;

the microprocessor processes the electrocardio analog signals to obtain electrocardio digital signals;

The Bluetooth module is connected with the microprocessor and used for transmitting the two-channel electrocardio digital signals;

The microprocessor uses STM32F103C8 as the master controller,

And the STM32F103C8 reads the electrocardio analog signal of the analog front end ADS1292R through an SPI bus, and performs AD conversion on the electrocardio analog signal to obtain the electrocardio digital signal.

2. The electrocardio acquisition device based on wireless transmission as claimed in claim 1, wherein the analog front end adopts an ADS1292R medical ADC chip for acquiring electrocardio analog signals of two channels;

and sending the electrocardio analog signal to the microprocessor through an SPI bus.

3. The wireless transmission-based electrocardiograph acquisition device according to claim 1, wherein the STM32F103C8 transmits the electrocardiograph digital signal to the bluetooth module through DMA; transmitting the data to an upper computer through the Bluetooth module;

And the upper computer displays and stores the electrocardiosignals in real time.