Electroencephalogram detection signal synchronization circuit and method and electroencephalogram detection system
A technology for detecting signals and synchronizing circuits, which is used in diagnostic recording/measurement, medical science, sensors, etc., and can solve problems such as randomness, inability to achieve real-time synchronization, and long delay time.
Active Publication Date: 2015-04-15
NCC MEDICAL
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Problems solved by technology
In the prior art, software communication is used to achieve synchronization. However, the delay time through software communication is long and random, and real-time synchronization cannot be achieved at all.
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[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0020] As a first aspect of the invention, please refer to figure 1 , providing a synchronous circuit for electroencephalogram detection signals, including: a photoelectric detection unit for detecting brain electrical stimulation images; an analog-to-digital conversion unit whose input end is connected to an output end of the photoelectric detection unit; The output end of the conversion unit is connected to the input end of the differential signal generating unit; the output end of the synchronous signal is connected to the output end of the differential signal generating unit. Preferably, please refer to figure 2 , the photodetection unit can be a phototransistor Q1, which is used to convert the light signal into an electrical signal and output...
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The invention relates to an electroencephalogram detection signal synchronization circuit and method and an electroencephalogram detection system. The electroencephalogram detection signal synchronization circuit comprises a photoelectric detection unit, an analog-digital conversion unit, a differential signal generation unit and a synchronization signal output end, wherein the photoelectric detection unit is used for detecting electroencephalogram stimulation pictures, the input end of the analog-digital conversion unit is connected with the output end of the photoelectric detection unit, the output end of the analog-digital conversion unit is connected with the input end of the differential signal generation unit, and the synchronization signal output end is connected with the output end of the differential signal generation unit. According to the electroencephalogram detection signal synchronization circuit and method and the electroencephalogram detection system, the hardware circuit method is adopted, synchronization can be built in real time as far as possible, visual stimulations can be accurately and constantly located in collected induced electroencephalogram data, therefore, shapes of induced brain waves, corresponding to the visual stimulation at a certain moment, of a subject are determined, and follow-up brain functional analysis can be conveniently carried out.
Description
technical field [0001] The invention relates to the field of medical equipment, in particular to an EEG detection signal synchronization circuit, method and EEG detection system. Background technique [0002] The EEG detection system is divided into two parts: the external visual stimulation part and the acquisition part of the EEG signal. The external visual stimulation part of the EEG signal is composed of a stimulation display and a stimulation host, the visual stimulation screen is displayed on the stimulation display, and the image control software runs on the stimulation host; the EEG signal acquisition part is composed of an amplification box and an EEG main control box. Among them, optical fiber communication is used between the amplification box and the main control box, and the main control box uses USB to transmit data to a host running an EEG signal processing program, which is called an acquisition host. [0003] In order to achieve the purpose of completely co...
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IPC IPC(8): A61B5/0484
Inventor 李晓欧张群峰吴向阳谭英超张科
Owner NCC MEDICAL