技术领域technical field
本实用新型涉及神经电生理学技术领域，尤其涉及一种基于声音刺激的脑电信号采集系统。The utility model relates to the technical field of neuroelectrophysiology, in particular to an electroencephalogram signal acquisition system based on sound stimulation.
背景技术Background technique
随着科技的进步以及工业的发展，人类生活的环境充斥着各种各样的声音，既包括我们喜欢的声音(例如音乐、虫鸣等)也包括噪音(例如工业噪音、交通噪音等)。随着脑电技术的发展，应用成熟的脑电技术进行声音对动物的影响研究已经十分普遍，现有技术中通过将动物放置于声音刺激环境下的屏蔽室中，通过采集实验对象的脑电信号，用以分析声音对实验对象的影响。With the advancement of science and technology and the development of industry, the environment of human life is full of various sounds, including our favorite sounds (such as music, insects, etc.) and noises (such as industrial noise, traffic noise, etc.). With the development of EEG technology, it is very common to use mature EEG technology to study the impact of sound on animals. In the prior art, animals are placed in a shielded room under the sound stimulation environment, and the EEG of the experimental subjects is collected. Signals used to analyze the effects of sound on test subjects.
然而，现有技术只采集有声音刺激环境下的脑电信号，在实验过程中只分析有声音刺激环境下的脑电信号，导致实验结果准确度低。However, the existing technology only collects the EEG signals in the environment with sound stimulation, and only analyzes the EEG signals in the environment with sound stimulation during the experiment, resulting in low accuracy of the experimental results.
实用新型内容Utility model content
为了解决现有技术只采集有声音刺激环境下的脑电信号，在实验过程中只分析有声音刺激环境下的脑电信号，导致实验结果准确度低的问题，本实用新型提供了一种基于声音刺激的脑电信号采集系统，脑电放大器先采集处于无声音刺激环境下的实验对象的脑电信号，之后单片机和音频功率放大器向屏蔽舱发送声音刺激信号，使屏蔽舱内形成声音刺激环境，脑电放大器再采集处于声音刺激环境下的实验对象的脑电信号，后续根据采集到的无声音刺激环境下和有声音刺激环境下的脑电信号分析声音对实验对象的影响。In order to solve the problem that the existing technology only collects the EEG signals in the environment with sound stimulation, and only analyzes the EEG signals in the environment with sound stimulation during the experiment, resulting in low accuracy of the experimental results, the utility model provides a method based on The EEG signal acquisition system for sound stimulation, the EEG amplifier first collects the EEG signals of the experimental subjects in an environment without sound stimulation, and then the single-chip microcomputer and audio power amplifier send sound stimulation signals to the shielding cabin to form a sound stimulation environment in the shielding cabin , the EEG amplifier collects the EEG signals of the experimental subjects in the sound stimulation environment, and then analyzes the influence of the sound on the experimental subjects according to the collected EEG signals in the environment without sound stimulation and the environment with sound stimulation.
本实用新型的目的是，提供一种基于声音刺激的脑电信号采集系统，所述基于声音刺激的脑电信号采集系统包括脑电放大器、单片机、音频功率放大器和屏蔽舱；The purpose of this utility model is to provide a kind of EEG signal acquisition system based on sound stimulation, said EEG signal acquisition system based on sound stimulation includes an EEG amplifier, a single-chip microcomputer, an audio power amplifier and a shielding cabin;
其中，所述脑电放大器，连接位于所述屏蔽舱内的实验对象，用于采集所述实验对象的脑电信号；Wherein, the EEG amplifier is connected to the experimental subject located in the shielded cabin, and is used to collect the EEG signal of the experimental subject;
所述单片机，连接所述音频功率放大器，用于向所述音频功率放大器发送声音刺激信号；The single-chip microcomputer is connected to the audio power amplifier, and is used to send a sound stimulation signal to the audio power amplifier;
所述音频功率放大器，连接所述屏蔽舱，用于接收所述声音刺激信号，进行放大处理后，向所述屏蔽舱发送所述声音刺激信号，以使所述屏蔽舱内形成声音刺激环境；The audio power amplifier is connected to the shielding cabin, and is used to receive the sound stimulation signal, and after performing amplification processing, send the sound stimulation signal to the shielding cabin, so that a sound stimulation environment is formed in the shielding cabin;
所述脑电放大器，还用于采集处于声音刺激环境下的所述实验对象的所述脑电信号。The EEG amplifier is also used to collect the EEG signals of the experimental subject under the sound stimulation environment.
可选的，所述单片机，连接所述脑电放大器，还用于向所述脑电放大器发送第一脉冲信号；Optionally, the single-chip microcomputer is connected to the EEG amplifier, and is also used to send a first pulse signal to the EEG amplifier;
所述脑电放大器，还用于接收所述第一脉冲信号，输出第一标记信号；The EEG amplifier is also used to receive the first pulse signal and output a first marker signal;
所述单片机，还用于当发送所述声音刺激信号时，向所述脑电放大器发送第二脉冲信号；The single-chip microcomputer is also used to send a second pulse signal to the EEG amplifier when sending the sound stimulation signal;
所述脑电放大器，还用于接收所述第二脉冲信号，输出第二标记信号。The EEG amplifier is also used to receive the second pulse signal and output a second marker signal.
可选的，所述单片机包括晶振电路、STC89C52芯片和PC817芯片；Optionally, the single-chip microcomputer includes a crystal oscillator circuit, an STC89C52 chip and a PC817 chip;
其中，所述晶振电路，连接所述SCT89C52芯片，用于向所述SCT89C52芯片发送时钟频率信号；Wherein, the crystal oscillator circuit is connected to the SCT89C52 chip for sending a clock frequency signal to the SCT89C52 chip;
所述STC89C52芯片，连接所述PC817芯片，用于接收所述时钟频率信号，向所述PC817芯片发送所述第一脉冲信号；The STC89C52 chip is connected to the PC817 chip for receiving the clock frequency signal and sending the first pulse signal to the PC817 chip;
所述STC89C52芯片，还用于当接收一开关信号时，向所述PC817芯片发送所述第二脉冲信号；The STC89C52 chip is also used to send the second pulse signal to the PC817 chip when receiving a switch signal;
所述PC817芯片，用于接收所述第一脉冲信号和所述第二脉冲信号，进行电平转换，输出电平转换后的第一脉冲信号和电平转换后的第二脉冲信号；The PC817 chip is used to receive the first pulse signal and the second pulse signal, perform level conversion, and output the first pulse signal after the level conversion and the second pulse signal after the level conversion;
所述STC89C52芯片，还用于向所述音频功率放大器发送所述声音刺激信号。The STC89C52 chip is also used to send the sound stimulation signal to the audio power amplifier.
可选的，所述音频功率放大器包括LM386芯片和扬声器；Optionally, the audio power amplifier includes an LM386 chip and a loudspeaker;
其中，所述LM386芯片，连接所述扬声器，用于接收所述声音刺激信号，进行放大处理后，发送给所述扬声器；Wherein, the LM386 chip is connected to the speaker for receiving the sound stimulation signal, amplifies it, and sends it to the speaker;
所述扬声器，设置于所述屏蔽舱内，用于播放所述声音刺激信号。The loudspeaker is arranged in the shielding cabin and is used to play the sound stimulation signal.
可选的，所述基于声音刺激的脑电信号采集系统还包括：Optionally, the EEG signal acquisition system based on sound stimulation also includes:
存储设备，连接所述脑电放大器，用于存储所述脑电信号、所述第一标记信号和所述第二标记信号。A storage device, connected to the EEG amplifier, for storing the EEG signal, the first marker signal and the second marker signal.
可选的，所述基于声音刺激的脑电信号采集系统还包括：Optionally, the EEG signal acquisition system based on sound stimulation also includes:
显示设备，连接所述存储设备，用于显示所述脑电信号、所述第一标记信号和所述第二标记信号。A display device, connected to the storage device, for displaying the EEG signal, the first marker signal and the second marker signal.
可选的，所述基于声音刺激的脑电信号采集系统还包括：Optionally, the EEG signal acquisition system based on sound stimulation also includes:
供电降压设备，连接所述脑电放大器、所述存储设备、所述显示设备、所述单片机和所述音频功率放大器，用于向所述脑电放大器、所述存储设备、所述显示设备、所述单片机和所述音频功率放大器供电。A power supply step-down device, connected to the EEG amplifier, the storage device, the display device, the single-chip microcomputer and the audio power amplifier, for supplying the EEG amplifier, the storage device, and the display device , the single-chip microcomputer and the audio power amplifier are powered.
可选的，所述供电降压设备包括供电装置和降压转流装置；Optionally, the power supply step-down device includes a power supply device and a step-down switching device;
其中，所述供电装置，连接所述降压转流装置，用于向所述降压转流装置发送高电压交流电；Wherein, the power supply device is connected to the step-down switching device, and is used to send high-voltage alternating current to the step-down switching device;
所述降压转流装置，用于将所述高电压交流电转换成低电压直流电。The step-down switching device is used to convert the high-voltage alternating current into low-voltage direct current.
可选的，所述降压转流装置包括数量相同的多个变压器和多个桥接二极管，所述变压器和所述桥接二极管对应连接；Optionally, the step-down converter device includes a plurality of transformers and a plurality of bridge diodes of the same number, and the transformers and the bridge diodes are correspondingly connected;
其中，所述变压器，用于将所述高电压交流电转换成低电压交流电，并发送给所述桥接二极管；Wherein, the transformer is used to convert the high-voltage alternating current into a low-voltage alternating current and send it to the bridge diode;
所述桥接二极管，由多个二极管桥接组成，用于接收所述低电压交流电，转换成所述低电压直流电。The bridge diode is composed of a plurality of diode bridges, and is used to receive the low-voltage alternating current and convert it into the low-voltage direct current.
本实用新型的有益效果在于，提供了一种基于声音刺激的脑电信号采集系统，单片机首先向脑电放大器发送第一脉冲信号，脑电放大器采集无声音刺激环境下的实验对象的脑电信号并输出第一标记信号，之后单片机发送声音刺激信号的同时向脑电放大器发送第二脉冲信号，脑电放大器采集有声音刺激环境下的实验对象的脑电信号并输出第二标记信号，后续根据所述第一标记信号和第二标记信号，区分无声音刺激下的脑电信号和有声音刺激下的脑电信号，来分析声音对实验对象的影响。The beneficial effect of the utility model is that a kind of EEG signal acquisition system based on sound stimulation is provided, the single-chip microcomputer first sends the first pulse signal to the EEG amplifier, and the EEG amplifier collects the EEG signal of the experimental subject under the environment without sound stimulation And output the first marking signal, then send the second pulse signal to the EEG amplifier while the single-chip microcomputer sends the sound stimulation signal, and the EEG amplifier collects the EEG signal of the experimental subject under the sound stimulation environment and outputs the second marking signal. The first marker signal and the second marker signal distinguish the EEG signals without sound stimulation and the EEG signals under sound stimulation, so as to analyze the influence of sound on the experimental subject.
为让本实用新型的上述和其他目的、特征和优点能更明显易懂，下文特举较佳实施方式，并配合所附图式，作详细说明如下。In order to make the above and other objectives, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below, together with the attached drawings, and are described in detail as follows.
附图说明Description of drawings
为了更清楚地说明本实用新型实施方式或现有技术中的技术方案，下面将对实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiment of the utility model or the prior art, the accompanying drawings that need to be used in the description of the embodiment or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description These are only some implementations of the present utility model, and those skilled in the art can obtain other drawings based on these drawings without creative work.
图1为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式一的结构示意图；Fig. 1 is a structural schematic diagram of Embodiment 1 of an EEG signal acquisition system based on sound stimulation provided by the present invention;
图2为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式二的结构示意图；Fig. 2 is the structural schematic diagram of Embodiment 2 of the EEG signal acquisition system based on sound stimulation provided by the present invention;
图3为本实用新型提供的单片机的结构示意图；Fig. 3 is the structural representation of the single-chip microcomputer provided by the utility model;
图4为本实用新型提供的音频功率放大器与屏蔽舱的连接示意图；Fig. 4 is the schematic diagram of the connection between the audio power amplifier and the shielding cabin provided by the utility model;
图5为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式三的结构示意图；FIG. 5 is a schematic structural diagram of Embodiment 3 of the EEG signal acquisition system based on sound stimulation provided by the present invention;
图6为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式四的结构示意图；Fig. 6 is a structural schematic diagram of Embodiment 4 of the EEG signal acquisition system based on sound stimulation provided by the present invention;
图7为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式五的结构示意图；7 is a schematic structural diagram of Embodiment 5 of the EEG signal acquisition system based on sound stimulation provided by the present invention;
图8为本实用新型供电降压设备的结构示意图；Fig. 8 is a schematic structural diagram of a power supply step-down device of the present invention;
图9为本实用新型降压转流装置的结构示意图。Fig. 9 is a structural schematic diagram of the step-down switching device of the present invention.
具体实施方式detailed description
下面将结合本实用新型实施方式中的附图，对本实用新型实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本实用新型一部分实施方式，而不是全部的实施方式。基于本实用新型中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Way. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
本实用新型针对目前现有技术中声音的频率复杂且不稳定以及不采集处于无声音刺激环境下的实验对象的脑电信号的问题，提出了一种基于声音刺激的脑电信号采集系统。The utility model aims at the problems in the prior art that the frequency of sound is complex and unstable and the EEG signal of the experimental subject in the environment without sound stimulation is not collected, and proposes an EEG signal acquisition system based on sound stimulation.
图1为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式一的结构示意图，如图1所示，基于声音刺激的脑电信号采集系统包括脑电放大器10、单片机20、音频功率放大器30和屏蔽舱40。Fig. 1 is the structure schematic diagram of the embodiment one of the EEG signal acquisition system based on sound stimulation provided by the utility model, as shown in Fig. Power amplifier 30 and shielded cabin 40.
其中，脑电放大器10，连接位于屏蔽舱40内的实验对象，用于采集实验对象的脑电信号，脑电放大器10可以通过铜金属电极线连接位于屏蔽舱40内的实验对象，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定。Wherein, the EEG amplifier 10 is connected to the experimental subject in the shielding cabin 40, and is used to collect the EEG signals of the experimental subject. The EEG amplifier 10 can be connected to the experimental subject in the shielding cabin 40 through copper metal electrode lines, or can be connected to the experimental subject in the shielding cabin 40 through Other commonly used cables in the field are used for connection, which is not limited in the present invention.
单片机20，连接音频功率放大器30，用于向音频功率放大器30发送声音刺激信号，单片机20可以通过3.5mm的音频线连接音频功率放大器30，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定，声音刺激信号可以是20Hz到20000Hz的单频率声音刺激信号也可以是其他范围混合频率的声音刺激信号，本实用新型不作限定。The single-chip microcomputer 20 is connected to the audio power amplifier 30, and is used to send sound stimulation signals to the audio power amplifier 30. The single-chip microcomputer 20 can be connected to the audio power amplifier 30 through a 3.5mm audio line, or can be connected through other common cables in the field. The invention is not limited, and the sound stimulation signal can be a single-frequency sound stimulation signal from 20 Hz to 20,000 Hz, or a sound stimulation signal with mixed frequencies in other ranges, which is not limited by the present invention.
音频功率放大器30，连接屏蔽舱40，用于接收声音刺激信号，进行放大处理后，向屏蔽舱40发送声音刺激信号，以使屏蔽舱40内形成声音刺激环境，音频功率放大器30可以通过3.5mm的音频线连接屏蔽舱40，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定，屏蔽舱40内侧安装有用于隔离外界声音干扰的屏蔽材料41，屏蔽材料41可以使用本领域常用的屏蔽材料，本实用新型不作限定。Audio power amplifier 30, connect shielding cabin 40, be used to receive sound stimulation signal, after amplifying, send sound stimulation signal to shielding cabin 40, so that the sound stimulation environment is formed in the shielding cabin 40, audio power amplifier 30 can pass 3.5mm The audio cable connected to the shielding cabin 40 can also be connected through other commonly used cables in the field. The utility model is not limited. A shielding material 41 is installed inside the shielding cabin 40 for isolating external sound interference. The shielding material is not limited in the present invention.
脑电放大器10，还用于采集处于声音刺激环境下的实验对象的脑电信号。The EEG amplifier 10 is also used to collect the EEG signals of the experimental subjects under the sound stimulation environment.
在本实用新型的实施方式一的具体实施中，脑电放大器10可以采用新拓NT9200脑电放大器，也可以采用本技术领域中满足本实用新型要求的其他脑电放大器，本实用新型不作限定。In the specific implementation of Embodiment 1 of the present utility model, the EEG amplifier 10 can be the Xintuo NT9200 EEG amplifier, or other EEG amplifiers in the technical field that meet the requirements of the present utility model, which are not limited by the present utility model.
在本实用新型的实施方式一中，通过脑电放大器10采集处于无声音刺激环境下的实验对象的脑电信号，通过单片机20向音频功率放大器30发送声音刺激信号，音频功率放大器30将声音刺激信号放大处理后向屏蔽舱40发送声音刺激信号，以使屏蔽舱40内形成声音刺激环境，通过脑电放大器10采集处于声音刺激环境下的实验对象的脑电信号，从而得到实验对象处于无声音刺激环境下和有声音刺激环境下的脑电信号。In the first embodiment of the present utility model, the EEG signal of the experimental subject under no sound stimulation environment is collected by the EEG amplifier 10, and the sound stimulation signal is sent to the audio power amplifier 30 by the single-chip microcomputer 20, and the audio power amplifier 30 stimulates the sound Send the sound stimulation signal to the shielding cabin 40 after the signal amplification processing, so that the sound stimulation environment is formed in the shielding cabin 40, and the EEG signal of the experimental subject under the sound stimulation environment is collected by the EEG amplifier 10, thereby obtaining the experimental subject in the soundless environment. EEG signals in a stimulating environment and in a sound stimulating environment.
图2为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式二的结构示意图，如图2所示，单片机20，连接脑电放大器10，还用于向脑电放大器10发送第一脉冲信号，单片机20可以通过RS232线连接脑电放大器10，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定。Fig. 2 is the structural representation of the embodiment two of the EEG signal acquisition system based on sound stimulation that the utility model provides, as shown in Fig. For a pulse signal, the single-chip microcomputer 20 can be connected to the EEG amplifier 10 through the RS232 line, and can also be connected through other common cables in the field, which is not limited in the present invention.
脑电放大器10，还用于接收第一脉冲信号，输出第一标记信号。The EEG amplifier 10 is also used to receive the first pulse signal and output the first label signal.
单片机20，还用于当发送声音刺激信号时，向脑电放大器10发送第二脉冲信号。The single-chip microcomputer 20 is also used to send the second pulse signal to the EEG amplifier 10 when the sound stimulation signal is sent.
脑电放大器10，还用于接收第二脉冲信号，输出第二标记信号。The EEG amplifier 10 is also used to receive the second pulse signal and output the second mark signal.
在本实用新型实施方式二的一种具体应用中，当单片机20向脑电放大器10发送的第一脉冲信号为高电平脉冲信号时，此时屏蔽舱40内的实验对象处于无声音刺激环境下，脑电放大器10实时采集实验对象的脑电信号，并输出第一标记信号，第一标记信号为全0。In a specific application of the second embodiment of the present invention, when the first pulse signal sent by the single-chip microcomputer 20 to the EEG amplifier 10 is a high-level pulse signal, the experimental subjects in the shielding cabin 40 are in a sound-free environment. Next, the EEG amplifier 10 collects the EEG signals of the subject in real time, and outputs the first flag signal, which is all 0s.
当单片机20向脑电放大器10发送的第二脉冲信号为低电平脉冲信号时，此时单片机20同时向音频功率放大器30发送声音刺激信号，音频功率放大器30将声音刺激信号进行放大后发送给屏蔽舱40，此时屏蔽舱40内的实验对象处于有声音刺激环境下，脑电放大器10实时采集实验对象的脑电信号，并输出第二标记信号，该第二标记信号在脑电放大器10接收到第二脉冲信号后标记为全1。When the second pulse signal sent by the single-chip microcomputer 20 to the EEG amplifier 10 was a low-level pulse signal, the single-chip microcomputer 20 sent the sound stimulation signal to the audio power amplifier 30 at the same time, and the audio power amplifier 30 amplified the sound stimulation signal and sent it to Shielded cabin 40, now the experimental subject in the shielded cabin 40 is under the sound stimulation environment, the EEG amplifier 10 collects the EEG signal of the experimental subject in real time, and outputs the second mark signal, and the second mark signal is generated in the EEG amplifier 10 It is marked as all 1s after receiving the second pulse signal.
在本实用新型实施方式二的另一种具体应用中，单片机20可以先发送第二脉冲信号，当触发同步操作后，发送第一脉冲信号，同样，脑电放大器10可以先输出第二标记信号，当触发同步操作后，输出第一标记信号，本实用新型不再赘述。In another specific application of the second embodiment of the present invention, the single-chip microcomputer 20 can first send the second pulse signal, and when the synchronous operation is triggered, send the first pulse signal, and similarly, the EEG amplifier 10 can first output the second mark signal , when the synchronous operation is triggered, the first marker signal is output, which will not be described in detail in the present invention.
在本实用新型的实施方式二中，通过单片机20向脑电放大器10发送第一脉冲信号和发送声音刺激信号时向脑电放大器10发送第二脉冲信号，脑电放大器10对应的输出第一标记信号和第二标记信号，以供后续根据第一标记信号和第二标记信号区分无声音刺激环境下的脑电信号和有声音刺激环境下的脑电信号，进而根据采集到的实验对象在无声音刺激环境下和有声音刺激环境下的脑电信号来分析声音对实验对象的影响。In the second embodiment of the present utility model, when the first pulse signal and the sound stimulation signal are sent to the brain electric amplifier 10 by the single-chip microcomputer 20, the second pulse signal is sent to the brain electric amplifier 10, and the corresponding output first mark of the brain electric amplifier 10 signal and the second marker signal, so as to distinguish the EEG signal in the environment without sound stimulation and the EEG signal in the environment with sound stimulation according to the first marker signal and the second marker signal, and then according to the collected experimental subjects in the The EEG signals under the sound stimulation environment and the sound stimulation environment were used to analyze the influence of sound on the experimental subjects.
图3为本实用新型提供的单片机20的结构示意图，如图3所示，单片机20包括晶振电路21、STC89C52芯片22和PC817芯片23。FIG. 3 is a schematic structural view of a single-chip microcomputer 20 provided by the present invention. As shown in FIG. 3 , the single-chip microcomputer 20 includes a crystal oscillator circuit 21 , an STC89C52 chip 22 and a PC817 chip 23 .
其中，晶振电路21，连接SCT89C52芯片22，用于向SCT89C52芯片22发送时钟频率信号。Wherein, the crystal oscillator circuit 21 is connected to the SCT89C52 chip 22 for sending a clock frequency signal to the SCT89C52 chip 22 .
STC89C52芯片22，连接PC817芯片23，用于接收时钟频率信号，向PC817芯片23发送第一脉冲信号。The STC89C52 chip 22 is connected to the PC817 chip 23 for receiving the clock frequency signal and sending the first pulse signal to the PC817 chip 23 .
STC89C52芯片22，还用于当接收一开关信号时，向PC817芯片23发送第二脉冲信号，开关信号可以是压力开关信号，也可以是定时器开关信号，还可以是本技术领域其他开关信号，本实用新型不作限定。STC89C52 chip 22 is also used to send a second pulse signal to PC817 chip 23 when receiving a switch signal. The switch signal can be a pressure switch signal, a timer switch signal, or other switch signals in the technical field. The utility model is not limited.
PC817芯片23，用于接收第一脉冲信号和第二脉冲信号，进行电平转换，输出电平转换后的第一脉冲信号和电平转换后的第二脉冲信号。The PC817 chip 23 is used for receiving the first pulse signal and the second pulse signal, performing level conversion, and outputting the first pulse signal after level conversion and the second pulse signal after level conversion.
STC89C52芯片22，还用于向音频功率放大器30发送声音刺激信号。The STC89C52 chip 22 is also used to send the sound stimulation signal to the audio power amplifier 30 .
在本实用新型的一种具体应用中，STC89C52芯片22向PC817芯片23发送第一脉冲信号，第一脉冲信号的电压为5V，PC817芯片23接收到第一脉冲信号后，通过电平转换，输出电平转换后的第一脉冲信号，电平转换后的第一脉冲信号的电压为0V，同理，STC89C52芯片22向PC817芯片23发送第二脉冲信号，第二脉冲信号的电压为0V，PC817芯片23接收到第二脉冲信号后，通过电平转换，输出电平转换后的第二脉冲信号，电平转换后的第二脉冲信号的电压为9V。In a specific application of the present utility model, the STC89C52 chip 22 sends the first pulse signal to the PC817 chip 23, and the voltage of the first pulse signal is 5V. After the PC817 chip 23 receives the first pulse signal, it converts the level to output The first pulse signal after level conversion, the voltage of the first pulse signal after level conversion is 0V, similarly, STC89C52 chip 22 sends the second pulse signal to PC817 chip 23, the voltage of the second pulse signal is 0V, PC817 After receiving the second pulse signal, the chip 23 outputs the second pulse signal after level conversion through level conversion, and the voltage of the second pulse signal after level conversion is 9V.
在本实用新型中，通过STC89C52芯片22向PC817芯片23发送第一脉冲信号和第二脉冲信号，PC817芯片23通过电平转换，得到脑电放大器10可识别的电压范围的电平转换后的第一脉冲信号和电平转换后的第二脉冲信号，脑电放大器10接收电平转换后的第一脉冲信号和电平转换后的第二脉冲信号，输出对应的第一标记信号和第二标记信号。In the utility model, the first pulse signal and the second pulse signal are sent to the PC817 chip 23 by the STC89C52 chip 22, and the PC817 chip 23 obtains the first pulse signal after the level conversion of the voltage range recognizable by the EEG amplifier 10 through level conversion. A pulse signal and the second pulse signal after the level conversion, the EEG amplifier 10 receives the first pulse signal after the level conversion and the second pulse signal after the level conversion, and outputs the corresponding first mark signal and the second mark Signal.
图4为实用新型提供的音频功率放大器与屏蔽舱的连接示意图，如图4所示，音频功率放大器30包括LM386芯片31和扬声器32。FIG. 4 is a schematic diagram of the connection between the audio power amplifier provided by the utility model and the shielding cabin. As shown in FIG. 4 , the audio power amplifier 30 includes an LM386 chip 31 and a speaker 32 .
其中，LM386芯片31，连接扬声器32，用于接收声音刺激信号，进行放大处理后，发送给扬声器32，LM386芯片31可以通过3.5mm的音频线连接扬声器32，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定。Among them, the LM386 chip 31 is connected to the loudspeaker 32 to receive the sound stimulation signal, and after amplified processing, it is sent to the loudspeaker 32. The LM386 chip 31 can be connected to the loudspeaker 32 through a 3.5mm audio cable, or through other commonly used cables in this field. Connect, the utility model is not limited.
扬声器32，设置于屏蔽舱40内，用于播放声音刺激信号。The loudspeaker 32 is arranged in the shielding cabin 40 and is used for playing sound stimulation signals.
图5为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式三的结构示意图，如图5所示，基于声音刺激的脑电信号采集系统还包括：Fig. 5 is a schematic structural diagram of Embodiment 3 of the EEG signal acquisition system based on sound stimulation provided by the present invention. As shown in Fig. 5, the EEG signal acquisition system based on sound stimulation also includes:
存储设备50，连接脑电放大器10，用于存储脑电信号、第一标记信号和第二标记信号。存储设备50可以通过USB串行线连接脑电放大器10，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定。The storage device 50 is connected to the EEG amplifier 10 and used for storing the EEG signal, the first marker signal and the second marker signal. The storage device 50 can be connected to the EEG amplifier 10 through a USB serial cable, or can be connected through other commonly used cables in the field, which is not limited by the present invention.
在本实用新型的实施方式三中，将脑电信号、第一标记信号和第二标记信号存储于存储设备50中，以便后续处理。In the third embodiment of the present invention, the EEG signal, the first marker signal and the second marker signal are stored in the storage device 50 for subsequent processing.
图6为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式四的结构示意图，如图6所示，基于声音刺激的脑电信号采集系统还包括：Fig. 6 is a schematic structural diagram of Embodiment 4 of the EEG signal acquisition system based on sound stimulation provided by the present invention. As shown in Fig. 6, the EEG signal acquisition system based on sound stimulation also includes:
显示设备60，连接存储设备50，用于显示脑电信号、第一标记信号和第二标记信号，显示设备60可以通过HDMI连接线或VGA连接线或DVI连接线连接存储设备50，也可以通过本领域其他常用线缆进行连接，本实用新型不作限定。The display device 60 is connected to the storage device 50, and is used to display the EEG signal, the first marker signal and the second marker signal. The display device 60 can be connected to the storage device 50 through an HDMI connection line or a VGA connection line or a DVI connection line, or can be connected to the storage device 50 through Other commonly used cables in the field are used for connection, which is not limited in the present invention.
在本实用新型的实施方式四中，脑电信号、第一标记信号和第二标记信号直接显示于显示设备60中，方便实时查看脑电信号、第一标记信号和第二标记信号，用以区分有无声音刺激环境下的脑电信号，并分析声音刺激对实验对象的影响。In Embodiment 4 of the present utility model, the EEG signal, the first marker signal and the second marker signal are directly displayed on the display device 60, which is convenient for real-time viewing of the EEG signal, the first marker signal and the second marker signal, for Distinguish the EEG signals in the environment with and without sound stimulation, and analyze the effect of sound stimulation on the experimental subjects.
图7为本实用新型提供的基于声音刺激的脑电信号采集系统的实施方式五的结构示意图，如图7所示基于声音刺激的脑电信号采集系统还包括：Fig. 7 is a schematic structural diagram of Embodiment 5 of the EEG signal acquisition system based on sound stimulation provided by the present invention. As shown in Fig. 7, the EEG signal acquisition system based on sound stimulation also includes:
供电降压设备70，连接脑电放大器10、存储设备50、显示设备60、单片机20和音频功率放大器30，用于向脑电放大器10、存储设备50、显示设备60、单片机20和音频功率放大器30供电。Power supply step-down device 70, connect EEG amplifier 10, storage device 50, display device 60, single-chip microcomputer 20 and audio power amplifier 30, for to EEG amplifier 10, storage device 50, display device 60, single-chip microcomputer 20 and audio frequency power amplifier 30 power supply.
在本实用新型具体应用中，供电降压设备70向脑电放大器10、存储设备50、显示设备60提供220V交流电，向单片机20提供5V和9V直流电，向音频功率放大器30提供12V直流电，供电降压设备70也可以根据用电设备的实际需求提供相应的电压，本实用新型不作限定。In the specific application of the utility model, the power supply step-down device 70 provides 220V AC power to the EEG amplifier 10, the storage device 50, and the display device 60, provides 5V and 9V DC power to the single-chip microcomputer 20, and provides 12V DC power to the audio power amplifier 30. The voltage device 70 can also provide corresponding voltage according to the actual demand of the electrical equipment, which is not limited in the present invention.
图8为本实用新型供电降压设备70的结构示意图，如图8所示，供电降压设备70包括供电装置71和降压转流装置72。FIG. 8 is a schematic structural diagram of a power supply step-down device 70 of the present invention. As shown in FIG. 8 , the power supply step-down device 70 includes a power supply device 71 and a step-down switching device 72 .
其中，供电装置71，连接降压转流装置72，用于向降压转流装置72发送高电压交流电。Wherein, the power supply device 71 is connected to the step-down commutating device 72 for sending high-voltage alternating current to the step-down commutating device 72 .
降压转流装置72，用于将高电压交流电转换成低电压直流电。The step-down switching device 72 is used to convert high-voltage AC power into low-voltage DC power.
在本实用新型具体应用中，供电设备71将220V交流电发送给降压转流设备72，降压转流设备72输出多种满足用电设备的低压直流电，该低压直流电可以是12V、9V和5V，可以根据用电设备的实际需求降压转流至相应的低压直流电，本实用新型不作限定，其中5V直流电用于单片机20的STC89C52芯片22和PC817芯片23供电，9V直流电用于单片机20的PC817芯片23的电平转换电压，12V直流电用于音频功率放大器30供电。In the specific application of the utility model, the power supply device 71 sends 220V AC to the step-down converter device 72, and the step-down converter device 72 outputs a variety of low-voltage direct currents that meet the requirements of the electrical equipment. The low-voltage direct current can be 12V, 9V and 5V , according to the actual needs of the electrical equipment, it can be stepped down and switched to the corresponding low-voltage direct current, which is not limited in the present invention, wherein the 5V direct current is used for the STC89C52 chip 22 and the PC817 chip 23 of the single-chip microcomputer 20 to supply power, and the 9V direct current is used for the PC817 of the single-chip microcomputer 20 The level conversion voltage of the chip 23, 12V DC, is used to power the audio power amplifier 30.
图9为本实用新型降压转流装置72的结构示意图，如图9所示，降压转流装置72包括数量相同的多个变压器721和多个桥接二极管722，变压器721和桥接二极管722对应连接。Fig. 9 is a structural schematic diagram of the step-down switching device 72 of the present invention. As shown in Fig. 9, the step-down switching device 72 includes a plurality of transformers 721 and a plurality of bridge diodes 722 with the same number, and the transformers 721 and bridge diodes 722 correspond to connect.
其中，变压器721，用于将高电压交流电转换成低电压交流电，并发送给桥接二极管722。Among them, the transformer 721 is used to convert the high-voltage AC power into a low-voltage AC power and send it to the bridge diode 722 .
桥接二极管722，由多个二极管723桥接组成，用于接收低电压交流电，转换成低电压直流电，其中桥接二极管722可以由4个二极管723桥接组成，也可以由其他数量的二极管723组成，本实用新型不作限定。The bridge diode 722 is composed of a plurality of diodes 723, and is used to receive low-voltage alternating current and convert it into low-voltage direct current. The bridge diode 722 can be composed of four diodes 723 or other numbers of diodes 723. This practical The new type is not limited.
为了进一步理解本实用新型提供的基于声音刺激的脑电采集系统具体实施方式，下面根据图7所示的实施方式五对本实用新型提供的基于声音刺激的脑电采集系统具体工作过程进行详细介绍，本实用新型也可依据其他实施方式进行具体实施，本实用新型不再赘述。In order to further understand the specific implementation of the EEG acquisition system based on sound stimulation provided by the present invention, the specific working process of the EEG acquisition system based on sound stimulation provided by the present invention will be introduced in detail below according to Embodiment 5 shown in FIG. 7 . The utility model can also be specifically implemented according to other implementation modes, and the utility model will not be repeated here.
(1)实验人员将实验对象放置在屏蔽舱40内，将铜金属电极线一端的电极片紧贴在实验对象头部，用于感应实验对象的脑电信号，将铜金属电极线的另一端连接脑电放大器10，通过脑电放大器10采集实验对象的脑电信号，之后，实验人员开启供电降压设备70，为脑电放大器10、单片机20、音频功率放大器30、存储设备50、显示设备60进行供电。(1) The experimenter places the test subject in the shielding cabin 40, and sticks the electrode plate at one end of the copper metal electrode wire to the head of the test subject to sense the brain signal of the test subject, and puts the other end of the copper metal electrode line Connect the EEG amplifier 10, collect the EEG signal of the experimental subject through the EEG amplifier 10, after that, the experimenter turns on the power supply step-down device 70, which is the EEG amplifier 10, the single-chip microcomputer 20, the audio power amplifier 30, the storage device 50, and the display device 60 for power supply.
(2)此时单片机20向脑电放大器10发送第一脉冲信号，此时屏蔽舱40内的实验对象处于无声音刺激环境辖，脑电放大器10通过铜金属电极线实时采集实验对象的脑电信号，并输出第一标记信号，该第一标记信号为全0，脑电放大器10将采集到的脑电信号和输出的第一标记信号存储于存储设备50中，并在显示设备60中进行显示，以便对实验对象的脑电信号进行实施观察和分析。(2) this moment single-chip microcomputer 20 sends the first pulse signal to EEG amplifier 10, and the experimental subject in the shielding cabin 40 is in the environment without sound stimulation this moment, and EEG amplifier 10 collects the EEG of the experimental subject in real time by the copper metal electrode wire signal, and output the first mark signal, the first mark signal is all 0, the EEG amplifier 10 stores the collected EEG signal and the output first mark signal in the storage device 50, and performs the process on the display device 60. Display, in order to observe and analyze the EEG signals of the experimental subjects.
(3)实验人员设置单片机20的声音刺激信号的频率，之后通过开关信号触发同步操作，此时单片机20向音频功率放大器30发送声音刺激信号并同时向脑电放大器10发送第二脉冲信号，音频功率放大器30接收到单片机20发送的声音刺激信号后，进行放大处理，通过扬声器32播放该声音刺激信号，此时屏蔽舱40内的实验对象处于有声音刺激环境下，脑电放大器10采集实验对象的脑电信号，并输出第二标记信号，该第二标记信号在脑电放大器10接收到单片机20发送的第二脉冲信号后标记为全1，脑电放大器10将采集到的脑电信号和输出的第二标记信号存储于存储设备50中，并在显示设备60中进行显示，以便对实验对象的脑电信号进行实施观察和分析。(3) The experimenter sets the frequency of the sound stimulation signal of the single-chip microcomputer 20, and then triggers the synchronous operation by the switch signal. At this time, the single-chip microcomputer 20 sends the sound stimulation signal to the audio power amplifier 30 and sends the second pulse signal to the EEG amplifier 10 simultaneously. After the power amplifier 30 receives the sound stimulation signal sent by the single-chip microcomputer 20, it performs amplifying processing, and plays the sound stimulation signal through the loudspeaker 32. At this moment, the experimental subject in the shielding cabin 40 is in a sound stimulating environment, and the EEG amplifier 10 collects the experimental subject. The EEG signal, and output the second mark signal, this second mark signal is marked as all 1 after the EEG amplifier 10 receives the second pulse signal sent by the single-chip microcomputer 20, and the EEG amplifier 10 collects the EEG signal and The output second marker signal is stored in the storage device 50 and displayed on the display device 60, so as to observe and analyze the EEG signal of the subject.
(4)实验人员停止实验，关闭脑电放大器10、单片机20和音频功率放大器30。(4) The experimenter stops the experiment and turns off the EEG amplifier 10 , the single-chip microcomputer 20 and the audio power amplifier 30 .
(5)实验人员通过显示设备60显示的脑电信号、第一标记信号和第二标记信号，得出对应第一标记信号的脑电信号为实验对象处于无声音刺激环境下的脑电信号，对应第二标记信号的脑电信号为实验对象处于有声音刺激环境下的脑电信号，通过分析采集到的实验对象在无声音刺激环境下和有声音刺激环境下的脑电信号分析声音刺激对生物的影响。(5) The experimenter draws the EEG signal corresponding to the first marker signal through the EEG signal, the first marker signal and the second marker signal displayed by the display device 60 as the EEG signal of the experimental subject in an environment without sound stimulation, The EEG signal corresponding to the second marker signal is the EEG signal of the experimental subject in the sound stimulation environment, and the sound stimulation effect is analyzed by analyzing the collected EEG signals of the experimental subject in the sound stimulation environment and the sound stimulation environment. Biological effects.
本实用新型的优点是：The utility model has the advantages of:
(1)脑电放大器既采集无声音刺激环境下的实验对象的脑电信号，又采集有声音刺激环境下的实验对象的脑电信号。(1) The EEG amplifier not only collects the EEG signals of the experimental subjects in the environment without sound stimulation, but also collects the EEG signals of the experimental subjects in the environment with sound stimulation.
(2)通过单片机向脑电放大器发送第一脉冲信号以及发送声音刺激信号时向脑电放大器发送第二脉冲信号，脑电放大器对应的输出第一标记信号和第二标记信号，以供后续根据第一标记信号和第二标记信号区分在无声音刺激环境下的脑电信号和有声音刺激环境下的脑电信号。(2) Send the first pulse signal to the EEG amplifier by the single-chip microcomputer and send the second pulse signal to the EEG amplifier when sending the sound stimulation signal, and the corresponding output first mark signal and the second mark signal of the EEG amplifier for follow-up basis The first marker signal and the second marker signal distinguish the EEG signals in the environment without sound stimulation and the EEG signals in the environment with sound stimulation.
(3)在分析声音对实验对象的影响中可以对采集到的有声音刺激环境下的和无声音刺激环境下的脑电信号进行对比分析，得出准确的实验结果。(3) In the analysis of the influence of sound on the experimental object, the collected EEG signals in the environment with sound stimulation and in the environment without sound stimulation can be compared and analyzed, and accurate experimental results can be obtained.
本实用新型中应用了具体实施方式对本实用新型的原理及实施方式进行了阐述，以上实施方式的说明只是用于帮助理解本实用新型的方法及其核心思想；同时，对于本领域的一般技术人员，依据本实用新型的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本实用新型的限制。Application of specific embodiment in the utility model has set forth the principle and implementation of the utility model, and the description of the above embodiment is only used to help understand the method of the utility model and its core idea; meanwhile, for those of ordinary skill in the art According to the idea of the present utility model, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as a limitation of the present utility model.
| Application Number | Priority Date | Filing Date | Title |
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| CN201621210035.9UCN206576859U (en) | 2016-11-09 | 2016-11-09 | Eeg signal acquisition system based on sonic stimulation |
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| CN201621210035.9UCN206576859U (en) | 2016-11-09 | 2016-11-09 | Eeg signal acquisition system based on sonic stimulation |
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| CN201621210035.9UActiveCN206576859U (en) | 2016-11-09 | 2016-11-09 | Eeg signal acquisition system based on sonic stimulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107802264A (en)* | 2017-11-27 | 2018-03-16 | 徐州医科大学 | A kind of toy sound discrimination and synchronous electricity physiological signal tape deck |
| CN109431496A (en)* | 2018-10-16 | 2019-03-08 | 北京工业大学 | A kind of assessment system and method using EEG signals assessment brain ability |
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| CN107802264A (en)* | 2017-11-27 | 2018-03-16 | 徐州医科大学 | A kind of toy sound discrimination and synchronous electricity physiological signal tape deck |
| CN109431496A (en)* | 2018-10-16 | 2019-03-08 | 北京工业大学 | A kind of assessment system and method using EEG signals assessment brain ability |
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