CN204744156U - Guardianship device based on wireless biomedical sensing - Google Patents

Abstract

The utility model relates to a monitoring device based on wireless biomedical sensing, which belongs to a medical detection device. The biomedical signal electrodes are respectively connected to the EEG signal acquisition module and the ECG signal acquisition module, and the EEG signal acquisition module and the ECG signal acquisition module are respectively connected to the signal transfer module, and the signal transfer module is connected to the Bluetooth transmission module. The advantages are novel structure, small size, low power consumption, light weight, high signal accuracy, stable transmission, good scalability, and accurate detection and processing of biological signals. This device can be perfected into wearable devices such as watches, belts, earmuffs, earphones, etc., which can meet the requirements of portable clinical ECG and EEG monitoring, mobile ECG and EEG monitoring and expert systems, long-term sleep research, sports training monitoring, entertainment, etc. Occasion needs, with strong practicality.

Description

Monitoring Device Based on Wireless Biomedical Sensing

technical field

The utility model belongs to a medical detection device, in particular to a monitoring device based on wireless biomedical sensing.

Background technique

ECG and EEG signals are important biomedical signals for humans. On the one hand, they can be used for the detection and research of cardiovascular and cerebrovascular diseases, and on the other hand, they can be used as an important reference for daily physical health assessment. With the development of modern medical technology, portable, wearable, remote and other intelligent daily health monitoring has been paid more and more attention, which makes the development of wireless biomedical sensing very fast. Because of its small size, light weight, easy to carry, low use conditions, stable signal, and low price, it poses a great challenge to traditional human heart computer monitoring products. At present, with the high stability of wireless technology, the high integration of biomedical sensors and the rapid development of embedded technology, a single wireless monitoring device for physiological signals such as ECG, EEG, body temperature, and respiration has gradually matured. A wireless monitoring device integrating multiple signal sensors has not been reported. Therefore, it is of great significance and significance to design a portable, miniaturized, intelligent, low power consumption, and wearable wireless monitoring device for human body multi-parameter physiological signals using highly integrated biomedical sensing modules combined with wireless transmission technology. Clinical practical value.

Contents of the invention

The utility model provides a monitoring device based on wireless biomedical sensing to solve the problem that various signal sensors are not integrated at present.

The technical solution adopted by the utility model is: the biomedical signal electrodes are respectively connected to the EEG signal acquisition module and the ECG signal acquisition module, and the EEG signal acquisition module and the ECG signal acquisition module are connected to the signal transfer module respectively, and the signal transfer module The connection module is connected with the Bluetooth transmission module;

The biomedical signal electrodes include EEG forehead electrodes, ear clips and ECG electrodes;

The electrocardiographic electrode adopts silver-silver chloride electrode or finger clip electrode;

The EEG signal acquisition module includes sequentially connected analog signal amplification module 1, filter module 1, analog-to-digital conversion module 1, digital filter module 1, and EEG data frequency band extraction module;

The ECG signal acquisition module includes sequentially connected analog signal amplification module 2, filter module 2, analog-to-digital conversion module 2, digital filter module 2, and ECG heart rate data extraction module.

The utility model has the advantages of novel structure, small volume, low power consumption, light weight, high signal precision, stable transmission, good expansibility, and can accurately detect and process biological signals. This device can be perfected into wearable devices such as watches, belts, earmuffs, earphones, etc., which can meet the requirements of portable clinical ECG and EEG monitoring, mobile ECG and EEG monitoring and expert systems, long-term sleep research, sports training monitoring, entertainment, etc. Occasion needs, with strong practicality. It can also comprehensively analyze the detected ECG signal and EEG signal data after being transmitted to the host computer, which can more comprehensively and objectively evaluate, check and monitor people's heart and brain health status.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

The biomedical signal electrodes 1 are respectively connected to the EEG signal acquisition module 2 and the ECG signal acquisition module 3, and the EEG signal acquisition module 2 and the ECG signal acquisition module 3 are respectively connected to the signal transfer module 4, and the signal transfer module is connected to the Bluetooth transmission module 5 connection;

The biomedical signal electrode 1 includes an EEG forehead electrode 101, an ear clip 102 and an ECG electrode 103;

The electrocardiographic electrode 103 adopts a silver-silver chloride electrode or a finger clip electrode;

The EEG signal acquisition module 2 includes sequentially connected analog signal amplification module one 201, filter module one 202, analog-to-digital conversion module one 203, digital filter module one 204, EEG data sub-frequency band extraction module 205;

The ECG signal acquisition module 3 includes a second analog signal amplification module 301 , a second filter module 302 , a second analog-to-digital conversion module 303 , a second digital filter module 304 , and an ECG heart rate data extraction module 305 connected in sequence.

working principle:

(1) First of all, the device uses EEG forehead electrodes and ear clips to collect EEG signals from the human body. Unlike wet sensors used in traditional medicine, which need to be coated with conductive glue, the electrodes of this device can be directly connected to dry contact points. The channel has 3 contact points: EEG (EEG acquisition point), REF (reference point), GND (ground point), among which the ear clip is used to achieve grounding; the ECG electrode adopts ECG silver-silver chloride electrode or finger Clip electrodes to obtain the ECG signal of the human body. Use Dupont wires to connect the finger-clip electrodes at the signal input end, and connect the shielding wires of the two Dupont wires to the ground of the signal transfer module to achieve the purpose of shielding interference, which is different from disposable surface-mounted ECG electrodes. , The finger clip electrode test is more convenient and flexible, and can be measured multiple times, reducing the cost of electrode consumables.

(2) The ECG and EEG signals collected by the electrodes are very weak and are easily disturbed, so analog amplification and filtering processing must be performed in the subsequent signal acquisition module. The device adopts BMD101 ECG signal acquisition module in the ECG signal path, which has advanced analog front-end circuit and flexible and powerful digital signal processing structure, and can amplify and filter ECG signals from uV to mV through the low-noise amplifier of the analog front-end Processing, and using a 16-bit high-precision analog-to-digital converter to convert the analog signal into a digital signal, the BMD101 ECG signal acquisition module outputs digital ECG signals and heart rate values, which are sent to the signal transfer module system through the serial port.

(3) The EEG signal is acquired by the forehead electrode and ear clip (grounding circuit) and enters the TGAM EEG signal acquisition module. The TGAM EEG signal acquisition module can detect the original EEG signal at 512Hz. This biosignal sensor chip is easy to use, Contact with the human body requires only a simple dry contact point. At the same time, it has advanced noise filtering technology, strong anti-interference, low energy consumption, and is suitable for battery-powered equipment for portable consumer products. The EEG signal in the device is connected to the TGAM EEG signal acquisition module through dry electrodes, and outputs original EEG and digital signals of EEG in different frequency bands. And send it to the next-level signal conversion module unit through the serial port.

(4) The signal transfer module receives and saves the digital signals obtained by the BMD101 ECG signal acquisition module and the TGAM EEG signal acquisition module in real time through the serial port. The digital ECG signal is transmitted to the host computer or mobile terminal 7 in real time through the bluetooth interface for further analysis and processing. Due to the small size, low power consumption, low cost and strong anti-interference ability of Bluetooth, it is very suitable for application in portable devices. This device adopts the integrated ATK-HC05 Bluetooth module for the design of wireless communication module. After successful pairing, the HC05 Bluetooth module can be used as a full-duplex serial port.

Claims (5)

1. A monitoring device based on wireless biomedical sensing, characterized in that: the biomedical signal electrodes are connected to an electroencephalogram acquisition module and an electrocardiogram acquisition module respectively, and the electroencephalogram acquisition module and the electrocardiogram acquisition module are respectively connected with The signal conversion module is connected, and the signal conversion module is connected with the bluetooth transmission module. 2. A monitoring device based on wireless biomedical sensing according to claim 1, characterized in that: said biomedical signal electrodes include EEG forehead electrodes, ear clips and ECG electrodes. 3. A monitoring device based on wireless biomedical sensing according to claim 2, characterized in that: the electrocardiographic electrodes are silver-silver chloride electrodes or finger clip electrodes. 4. a kind of monitoring device based on wireless biomedical sensing according to claim 1, is characterized in that: described EEG signal acquisition module comprises analog signal amplification module one, filtering module one, analog-to-digital conversion module connected in sequence 1. Digital filtering module 1. EEG data frequency band extraction module. 5. A monitoring device based on wireless biomedical sensing according to claim 1, characterized in that: the electrocardiographic signal acquisition module includes a sequentially connected analog signal amplification module two, a filter module two, and an analog-to-digital conversion module 2. Digital filtering module 2. ECG heart rate data extraction module.