阅读说明：本技术 用于脑电信号存储、传输的植入式闭环自响应系统及方法 (Implanted closed-loop self-response system and method for storing and transmitting electroencephalogram signals ) 是由 林阿龙 陈新蕾 曹鹏 于 2021-02-05 设计创作，主要内容包括：本发明涉及一种用于脑电信号存储、传输的植入式闭环自响应系统,包括植入装置和体外装置,所述植入装置包括用于采集脑电信号的信号采集模块、用于分析脑电信号的MCU、用于存储脑电信号的存储模块、用于传输脑电的体内通讯模块；所述体外装置包括上位机,所述上位机中设置有无线通讯模块,所述MCU分别与信号采集模块、存储模块、体内通讯模块电性连接。本发明利用植入体内的MCU来缓存脑电数据,根据上位机或MCU指令开始记录时,将缓存的数据发送至存储模块中,经压缩后存储,植入体经无线通讯模块向外界传输数据,以增强植入体记录脑电的能力。(The invention relates to an implanted closed-loop self-response system for storing and transmitting electroencephalogram signals, which comprises an implanted device and an in-vitro device, wherein the implanted device comprises a signal acquisition module for acquiring electroencephalogram signals, an MCU (microprogrammed control unit) for analyzing the electroencephalogram signals, a storage module for storing the electroencephalogram signals and an in-vivo communication module for transmitting the electroencephalogram signals; the in vitro device comprises an upper computer, a wireless communication module is arranged in the upper computer, and the MCU is electrically connected with the signal acquisition module, the storage module and the in vivo communication module respectively. The invention utilizes the MCU implanted in the body to cache the electroencephalogram data, when the recording is started according to the instruction of the upper computer or the MCU, the cached data is sent to the storage module, the data is stored after being compressed, and the implant transmits the data to the outside through the wireless communication module, so as to enhance the electroencephalogram recording capability of the implant.)

1. An implanted closed-loop self-response system for storing and transmitting electroencephalogram signals is characterized by comprising an implanted device and an in-vitro device, wherein the implanted device comprises a signal acquisition module for acquiring electroencephalogram signals, an MCU (microprogrammed control unit) for analyzing the electroencephalogram signals, a storage module for storing the electroencephalogram signals and an in-vivo communication module for transmitting the electroencephalogram signals; the in vitro device comprises an upper computer, a wireless communication module is arranged in the upper computer, and the MCU is electrically connected with the signal acquisition module, the storage module and the in vivo communication module respectively.

2. The implantable closed-loop self-response system and method for brain electrical signal storage, transmission according to claim 1, wherein said storage module employs FRAM.

3. The implantable closed-loop self-response system and method for storing and transmitting electroencephalogram signals according to claim 1, wherein the signal acquisition module is internally provided with acquisition electrodes of two channels with different polarities.

4. An implanted closed-loop self-response method for storing and transmitting electroencephalogram signals, which is based on the implanted closed-loop self-response system and the implanted closed-loop self-response method for storing and transmitting electroencephalogram signals in claims 1-3, and is characterized by comprising the following steps:

s1: the implant module works in an automatic mode, the signal acquisition module continuously acquires electroencephalogram signals and inputs the acquired electroencephalogram signals into the MCU for caching;

s2: if the collected electroencephalogram signals trigger events preset in the MCU, the MCU compresses the cached electroencephalogram signals and writes the electroencephalogram signals into the FRAM;

s3: when the trigger event occurs, the MCU records the information of the trigger event and writes the information into the FRAM;

s4: the electroencephalogram signals stored in the FRAM are transmitted to an upper computer through an in-vivo communication module.

5. The implantable closed-loop self-response method for electroencephalogram signal storage and transmission according to claim 4, further comprising a manual mode, specifically: the upper computer sends out a control signal, the wireless communication module and the in-vivo communication module transmit the control signal to the MCU, the MCU sends out a control command to the acquisition electrode, the signal acquisition module acquires an electroencephalogram signal and records the electroencephalogram signal to the MCU.

6. The implantable closed-loop self-response method for brain electrical signal storage and transmission according to claim 4, wherein the brain electrical signal is compressed in a lossless manner in step S2, and data is transmitted between the in vivo communication module and the upper computer in step S4 by Bluetooth communication.

7. The implantable closed-loop self-response method for brain electrical signal storage and transmission according to claim 4, wherein said triggering event information in step S3 includes time information, event information and channel information.

8. The implantable closed-loop self-response method for brain electrical signal storage and transmission according to claims 4-7, wherein the brain electrical signal is represented by discrete and continuous sampling points, and the buffer length of the sampling points is determined according to the setting and the preset value in MCU.

9. The implantable closed-loop self-response method for storing and transmitting electroencephalogram signals according to claim 8, wherein the preset value is set to 2 minutes, specifically 1 minute before and after the real-time sampling point of the trigger event; in a conventional mode, the sampling points adopt a circular queue mode, and take a preset value as a standard to record electroencephalogram signals in an overlaying mode.

Technical Field

The invention belongs to the field of signal transmission, and particularly relates to an implanted closed-loop self-response system and method for storing and transmitting electroencephalogram signals.

Background

The electroencephalogram amplifier is a collection device for obtaining brain signals in a non-invasive mode, but because the electroencephalogram signals are submerged in environmental noise, when the noise is removed by adopting an analog circuit, the analog circuit often cannot improve the common mode rejection ratio due to the limitation of offset voltage and the like, and the noise of devices can be increased due to the increase of analog devices, so that the frequency band range of the signals collected by the conventional electroencephalogram amplifier is limited, the collected signals can also contain noise interference, the difficulty of subsequent processing is increased, and the development of medical treatment and scientific research can be influenced

Although the electroencephalogram acquisition devices disclosed in CN103519807, CN201220428883 and CN201210308665 can acquire weak signals such as electroencephalogram, compared with electrical signals of nerve nuclei in the brain, the characteristics of discharge of the electroencephalogram acquisition devices are very different from those of electroencephalogram signals. The discharge signal of the nerve nuclei in the brain is weak in amplitude and high in discharge frequency, if the signal is required to be collected, the sampling frequency must be above 2000Hz, and the electroencephalogram collection frequency is generally hundreds of Hz, which is the biggest difference from the electroencephalogram collection. Therefore, these disclosed electroencephalogram acquisition devices are not suitable for acquisition of deep brain nuclei electrical discharge signals. In addition, the power consumption and the volume of the products are very large, which is inconvenient to carry and move, and the above products are basically based on 12 or 24 bit AD conversion chips for acquisition, and the latter bits of the AD conversion chips are not credible due to the accuracy of the chips themselves, and do not meet the ideal accuracy requirement.

The implantable medical apparatus belongs to a miniature medical apparatus, and is of various types, such as an implantable cardiac pacemaker, an implantable defibrillator, an implantable nerve stimulator, an implantable muscle stimulator, an implantable physiological signal recorder, an implantable drug pump and the like, and generally comprises an internal implantation device and an external control device, and information is exchanged between the internal implantation device and the external control device through bidirectional wireless communication.

Disclosure of Invention

In order to solve the problems, the invention provides an implanted closed-loop self-response system and method for storing and transmitting electroencephalogram signals, wherein the embedded MCU can be used for caching electroencephalogram data, when recording is started according to an instruction of an upper computer or the MCU, the cached data are sent to a storage module, the data are stored after being compressed, and the implant transmits the data to the outside through a wireless communication module, so that the electroencephalogram recording capability of the implant is enhanced, and the change of the electroencephalogram signals of a human body can be conveniently checked by the outside so as to implement optimal medical measures.

The technical scheme of the invention is as follows:

an implanted closed-loop self-response system for storing and transmitting electroencephalogram signals comprises an implanted device and an in-vitro device, wherein the implanted device comprises a signal acquisition module for acquiring electroencephalogram signals, an MCU for analyzing the electroencephalogram signals, a storage module for storing the electroencephalogram signals and an in-vivo communication module for transmitting the electroencephalogram signals; the in vitro device comprises an upper computer, a wireless communication module is arranged in the upper computer, and the MCU is electrically connected with the signal acquisition module, the storage module and the in vivo communication module respectively.

Preferably, the storage module adopts FRAM.

Preferably, the signal acquisition module is provided with two channels of acquisition electrodes with different polarities.

The invention also provides an implanted closed-loop self-response method for storing and transmitting the electroencephalogram signals, and based on the implanted closed-loop self-response system and the method for storing and transmitting the electroencephalogram signals, the method comprises the following steps:

s1: the implant module works in an automatic mode, the signal acquisition module continuously acquires electroencephalogram signals and inputs the acquired electroencephalogram signals into the MCU for caching;

s2: if the collected electroencephalogram signals trigger events preset in the MCU, the MCU compresses the cached electroencephalogram signals and writes the electroencephalogram signals into the FRAM;

s3: when the trigger event occurs, the MCU records the information of the trigger event and writes the information into the FRAM;

s4: the electroencephalogram signals stored in the FRAM are transmitted to an upper computer through an in-vivo communication module.

Preferably, the method further comprises a manual mode, specifically: the upper computer sends out a control signal, the wireless communication module and the in-vivo communication module transmit the control signal to the MCU, the MCU sends out a control command to the acquisition electrode, the signal acquisition module acquires an electroencephalogram signal and records the electroencephalogram signal to the MCU.

Preferably, the manner of compressing the electroencephalogram signal in step S2 is lossless compression, and in step S4, the data is transmitted between the in-vivo communication module and the upper computer by bluetooth communication.

Preferably, the information of the trigger event in step S3 includes time information, event information, and channel information.

Preferably, the electroencephalogram signal is represented by discrete and continuous sampling points, and the buffer length of the sampling points is determined according to the setting and the preset value in the MCU.

Preferably, the preset value is set to be 2 minutes, specifically, 1 minute is respectively arranged before and after the real-time sampling point of the trigger event; in a conventional mode, the sampling points adopt a circular queue mode, and take a preset value as a standard to record electroencephalogram signals in an overlaying mode.

The invention has the beneficial effects that: the invention utilizes the MCU implanted in the body to cache the electroencephalogram data, when the recording is started according to the instruction of the upper computer or the MCU, the cached data is sent to the storage module, the data is stored after being compressed, and the implant transmits the data to the outside through the wireless communication module, so as to enhance the electroencephalogram recording capability of the implant and facilitate the outside to check the change of the electroencephalogram signals of the human body so as to implement the optimal medical measures.

Drawings

FIG. 1 is a block diagram of a system provided by the present invention.

Fig. 2 is a flow chart of the control method of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an implanted closed-loop self-response system for storing and transmitting electroencephalogram signals comprises an implanted device and an in-vitro device, wherein the implanted device comprises a signal acquisition module for acquiring electroencephalogram signals, an MCU for analyzing the electroencephalogram signals, a storage module for storing the electroencephalogram signals, and an in-vivo communication module for transmitting electroencephalogram signals; the in-vitro device comprises an upper computer, a wireless communication module is arranged in the upper computer, and the MCU is electrically connected with the signal acquisition module, the storage module and the in-vivo communication module respectively.

As an embodiment of the present invention, the memory module employs FRAM.

As another embodiment of the present invention, the signal acquisition module is provided with two channels of acquisition electrodes with different polarities.

As shown in fig. 2, an implantable closed-loop self-response method for storing and transmitting electroencephalogram signals is based on an implantable closed-loop self-response system for storing and transmitting electroencephalogram signals, and includes the following steps:

s1: the implant module works in an automatic mode, the signal acquisition module continuously acquires electroencephalogram signals and inputs the acquired electroencephalogram signals into the MCU for caching;

s2: if the collected electroencephalogram signals trigger events preset in the MCU, the MCU compresses the cached electroencephalogram signals and writes the electroencephalogram signals into the FRAM;

s3: when the trigger event occurs, the MCU records the information of the trigger event and writes the information into the FRAM;

s4: the electroencephalogram signals stored in the FRAM are transmitted to an upper computer through an in-vivo communication module.

As a specific embodiment of the present invention, the event triggered in step S2 includes a time duration change, a threshold length change, an energy change, a frequency change, a parameter change occurring in time domain and spectrum analysis utilized in electroencephalogram analysis, and the energy change is an energy analysis parameter in electroencephalogram analysis, for example, analysis of a frequency band energy characteristic, and a specific numerical range of each of the above parameters is determined according to an actual situation, and is not limited in this embodiment. As an embodiment of the invention, the time for regular acquisition can be set, the electroencephalogram signals of the user can be acquired and recorded, more data references are provided for the subsequent work, and the acquisition period can be set according to the actual situation of the user and is not limited here.

As a specific embodiment of the present invention, the automatic mode further includes a manual mode, specifically: the upper computer sends out a control signal, the wireless communication module and the in-vivo communication module transmit the control signal to the MCU, the MCU sends out a control command to the acquisition electrode, the signal acquisition module acquires an electroencephalogram signal and records the electroencephalogram signal to the MCU.

As an embodiment of the present invention, the manner of compressing the electroencephalogram signal in step S2 is lossless compression, and in step S4, the in-vivo communication module and the upper computer transmit data by bluetooth communication.

As a specific embodiment of the present invention, the information of the trigger event in step S3 includes time information, event information, and channel information. The recorded information as a trigger event is stored to the corresponding location.

As an embodiment of the invention, the electroencephalogram signal is represented by discrete and continuous sampling points, and the cache length of the sampling points is determined according to the setting and the preset value in the MCU, wherein the preset value is set to be 2 minutes, specifically, 1 minute is respectively arranged before and after the real-time sampling point of the trigger event; in a conventional mode, the sampling points adopt a circular queue mode, and take a preset value as a standard to record electroencephalogram signals in an overlaying mode.

The invention realizes the acquisition, storage and transmission of electroencephalogram signals by utilizing automatic and manual double working modes and an algorithm preset in an MCU (microprogrammed control Unit) and matching with a hardware system provided by the invention, and can check specific conditions under a preset trigger event, such as time, data of a trigger event information collection channel and the like, through an upper computer and manually acquire the information of the current electroencephalogram signals through the upper computer; the sampling point of the electroencephalogram signal records the information before and after the trigger event in a cache mode, so that the condition of a user can be better known.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.