CN107479448A - A kind of device and method for eliminating signal transmitting and receiving delay - Google Patents
A kind of device and method for eliminating signal transmitting and receiving delay Download PDFInfo
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- CN107479448A CN107479448A CN201710857819.3A CN201710857819A CN107479448A CN 107479448 A CN107479448 A CN 107479448A CN 201710857819 A CN201710857819 A CN 201710857819A CN 107479448 A CN107479448 A CN 107479448A
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- signal
- audio signal
- eeg signals
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The invention discloses a kind of device and method for eliminating signal transmitting and receiving delay, its device includes computer, defiber, signal processing unit, audio signal divider and earphone, computer is connected with earphone, audio signal divider respectively by defiber, and signal processing unit is connected with earphone, audio signal divider, computer respectively；Audio signal divider is connected by audio signal transmission wire with signal processing unit, and EEG signals pass through EEG signals transfer wire input signal processing unit；It is divided into two-way through defiber in the audio signal that the COBBAIF of computer gathers, audio signal is by producing EEG signals all the way after earphone input human brain, and another way audio signal is after audio signal divider with EEG signals in same time entering signal processing unit.The present invention is mark without using the stimulation time of origin of computer record, and uses the time caused by sound reality to eliminate the delay of signal transmitting and receiving as mark.
Description
Technical field
The invention belongs to Electrophysiology field, a kind of device and method for eliminating signal transmitting and receiving delay.
Background technology
In Evoked ptential and event related potential in use, sending stimulus signal and gathering prolonging between EEG signals
When be insoluble problem.No matter how quick hardware, software development be, and stimulus signal (i.e. voice signal) is issued to from computer
Always there is not eliminable delay between eeg signal acquisition recovery, according to different software and hardware structures, the delay can be with
From a few tens of milliseconds to hundreds of milliseconds.And for Evoked ptential and the eeg signal acquisition of event related potential, this period
Delay may cause the global displacement of final signal, simultaneously because signal delay has certain randomness, for there is additive process
Signal acquisition, more signal may be caused the situation of distortion occur.
The content of the invention
For solve prior art present in technical problem, the present invention provide it is a kind of eliminate signal transmitting and receiving delay device and
Method, it is mark without using the stimulation time of origin of computer record, and uses the time caused by sound reality to be eliminated as mark
The delay of signal transmitting and receiving.
The present invention eliminates the device of signal transmitting and receiving delay, including computer, defiber, signal processing unit, audio signal
Divider and earphone, computer are connected with earphone, audio signal divider respectively by defiber, signal processing unit difference
It is connected with earphone, audio signal divider, computer；Audio signal divider passes through audio signal transmission wire and signal transacting
Unit connects, and EEG signals pass through EEG signals transfer wire input signal processing unit；Gathered in the COBBAIF of computer
Audio signal be divided into two-way through defiber, audio signal after earphone input human brain by producing EEG signals, another way all the way
Audio signal is after audio signal divider with EEG signals in same time entering signal processing unit.
Preferably, the signal processing unit includes controller, USB interface, two-way operational amplifier, two-way analog-to-digital conversion
Device, operational amplifier, analog-digital converter, controller are sequentially connected, and controller is connected by USB interface with computer, is transported all the way
Calculate amplifier and receive EEG signals, another way operational amplifier reception signal.
The method that the present invention eliminates signal transmitting and receiving delay, the device being delayed based on above-mentioned elimination signal transmitting and receiving, including it is following
Step：
S1, computer COBBAIF collection output audio signal；
S2, the audio signal gathered are divided into two-way after defiber, after audio signal is by earphone input human brain all the way
Produce EEG signals, another way audio signal input audio signal divider；
S3, by the audio signal and EEG signals of audio signal divider in same time input signal processing unit；
S4, EEG signals and audio signal are reclaimed after signal processing unit processes by computer, and computer is to returning
The audio signal of receipts come determine stimulus signal reach human ear time point.
Preferably, in step S3, signal processing unit is to the processing procedure of audio signal and EEG signals：First put
Big processing, then carries out analog-to-digital conversion by the signal of amplification, converts analog signals into data signal, and last controller will be changed
Data signal afterwards is transmitted to computer by USB interface.
The present invention compared with prior art, has the following advantages that and beneficial effect：Perfect can solve physics latency issue,
Separated different from stimulus signal and EEG signals the amplification record of prior art, during due to stimulation generation without using computer record
Between for mark, and use caused by sound reality the time as marking, it is more accurate than prior art；Meanwhile it also avoid piercing
Energizing signal and EEG signals record caused delay respectively.
Brief description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention；
Fig. 2 is the circuit diagram of signal processing unit；
Fig. 3 is EEG signals figure；
Fig. 4 is voice signal figure.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment
As shown in figure 1, the device that the present invention eliminates signal transmitting and receiving delay includes computer 5, defiber 1, signal transacting list
Member 3, audio signal divider 7 and earphone 6, computer 5 are connected with earphone 6, audio signal divider 7 respectively by defiber 1
Connect, signal processing unit 3 is connected with earphone, audio signal divider 7, computer 5 respectively.Audio signal divider passes through audio
Signal transmission wire 8 is connected with signal processing unit 3, and EEG signals are single by the processing of the input signal of EEG signals transfer wire 2
Member 3.
By the present invention in that with easy audio signal divider, stimulus signal (is handled through audio signal divider
Audio signal) have passed through in signal processing unit with EEG signals identical signal processing, with EEG signals quilt jointly
Record, so as to eliminate due to latency issue caused by signal transmission.EEG signals and audio signal are through signal processing unit processes
Reclaimed afterwards by computer, computer determines that stimulus signal (i.e. voice signal) reaches human ear to the audio signal of recovery
Time point, simultaneously because voice signal and EEG signals have passed through identical circuit (i.e. signal processing unit 3) after collection,
Its time shaft is in Complete Synchronization state with EEG signals, and identified time point does not have physics delay.
Such as Fig. 2, signal processing unit includes controller U5, USB interface, two-way operational amplifier (i.e. amplifier U2), two-way
Analog-digital converter, operational amplifier, analog-digital converter, controller are sequentially connected, and USB interface is connected with controller, all the way computing
Amplifier receives EEG signals, and another way operational amplifier receives voice signal.In signal processing unit, EEG signals enter
The amplifier U2 (CLC1200) of signal processing unit is amplified, and the signal of uV levels is amplified into mV levels；Then by the brain electricity of amplification
Signal carries out analog-to-digital conversion U4 (ADS1258), converts analog signals into data signal, last controller U5
(STM32F103RCT6) data signal after conversion is transmitted to computer by USB interface U6 (FT245L), by the brain of collection
Electric signal is uploaded to host computer processing, is finally gathered in computer end.As seen from the figure, the audio gathered in the COBBAIF of computer
Signal is divided into two-way through defiber, and audio signal after earphone input human brain by producing EEG signals all the way；Another way audio is believed
Number after audio signal divider, with EEG signals same time entering signal processing unit carries out operation amplifier, modulus turns
Change, by identical processing procedure, finally got off by computer record.
There is notable difference on wave amplitude by having voice signal to input and inputting gathered waveform without voice signal,
Noise when having the wave amplitude of voice signal can be than no signal is higher by dozens to one hundred times, so the judgement that use uses below is patrolled
It volume can be very good to search out the particular location of time that each voice signal is sent on EEG signals time shaft, and in phase
Answer and marked a little on the EEG signals figure of position, and superposition is proceeded by from mark point, as shown in Figure 3,4, such method
Can solve mark inaccuracy caused by being delayed, while also allow stimulation mode that there is more free change space.The judgement is patrolled
Collect and be：Assuming that in the signal now gathered, the lead of audio is gathered, signal has notable difference on wave amplitude, then starting point is just
Labeled as 1, other points are labeled as 0, mark result as shown in Figure 4.In Fig. 3,4,21 be EEG signals waveform, and 22 be brain telecommunications
Number, 23 be sound signal waveform, and 24 be mark point, and 25 be superposition section, and 26 be sound signal data.
The present embodiment signal is marked identification from Matlab programs, and its process is as follows：First by all data points
Positive number is converted into, then calculates average value, number of twice more than average value takes 1, and number of twice less than average is taken as 0.When one 1 number
According to preceding 500ms without 0 and when 100ms has more than 10 1 below, it is believed that this point uses measuring point to stimulate the time occurred
The data original position average as EEG signals data investigation.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (7)
1. a kind of device for eliminating signal transmitting and receiving delay, it is characterised in that including computer, defiber, signal processing unit, sound
Frequency signal divider and earphone, computer are connected with earphone, audio signal divider respectively by defiber, signal transacting list
Member is connected with earphone, audio signal divider, computer respectively；Audio signal divider passes through audio signal transmission wire and letter
The connection of number processing unit, EEG signals pass through EEG signals transfer wire input signal processing unit；Connect in the audio of computer
The audio signal of mouthful collection is divided into two-way through defiber, and audio signal is after earphone input human brain by producing EEG signals all the way,
Another way audio signal is after audio signal divider with EEG signals in same time entering signal processing unit.
2. the device according to claim 1 for eliminating signal transmitting and receiving delay, it is characterised in that the signal processing unit bag
Include controller, USB interface, two-way operational amplifier, two-way analog-digital converter, operational amplifier, analog-digital converter, controller according to
Secondary connection, controller are connected by USB interface with computer, and operational amplifier receives EEG signals all the way, and another way computing is put
Big device reception signal.
3. the device according to claim 2 for eliminating signal transmitting and receiving delay, it is characterised in that the operational amplifier uses
CLC1200。
4. the device according to claim 2 for eliminating signal transmitting and receiving delay, it is characterised in that the controller uses
STM32F103RCT6。
5. the device according to claim 2 for eliminating signal transmitting and receiving delay, it is characterised in that the analog-digital converter uses
ADS1258。
6. based on the method for eliminating signal transmitting and receiving delay for the device that signal transmitting and receiving delay is eliminated described in claim 1, its feature
It is, comprises the following steps：
S1, computer COBBAIF collection output audio signal；
S2, the audio signal gathered are divided into two-way after defiber, and audio signal after earphone input human brain by producing all the way
EEG signals, another way audio signal input audio signal divider；
S3, by the audio signal and EEG signals of audio signal divider in same time input signal processing unit；
S4, EEG signals and audio signal are reclaimed after signal processing unit processes by computer, and computer is to recovery
Audio signal come determine stimulus signal reach human ear time point.
7. the method according to claim 6 for eliminating signal transmitting and receiving delay, it is characterised in that in step S3, signal transacting
Unit is to the processing procedure of audio signal and EEG signals：Enhanced processing is first carried out, the signal of amplification is then subjected to modulus
Conversion, converts analog signals into data signal, last controller transmits the data signal after conversion to meter by USB interface
Calculation machine.
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| CN201710857819.3A CN107479448B (en) | 2017-09-21 | 2017-09-21 | A kind of device and method for eliminating signal transmitting and receiving delay |
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| CN201710857819.3A CN107479448B (en) | 2017-09-21 | 2017-09-21 | A kind of device and method for eliminating signal transmitting and receiving delay |
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| CN107479448B CN107479448B (en) | 2019-11-26 |
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Citations (7)
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| CN2753290Y (en) * | 2004-11-22 | 2006-01-25 | 中国科学院心理研究所 | Event-related potential instrument for collecting human neurobiological electric signal |
| CN101507606A (en) * | 2008-12-09 | 2009-08-19 | 上海理工大学 | Brain evoked potential collection method |
| JP5219202B2 (en) * | 2008-10-02 | 2013-06-26 | 学校法人金沢工業大学 | Sound signal processing device, headphone device, and sound signal processing method |
| CN103494608A (en) * | 2013-10-16 | 2014-01-08 | 上海谱康电子科技有限公司 | Electroencephalogram detection signal synchronization circuit and method and electroencephalogram detection system |
| CN103716744A (en) * | 2012-10-08 | 2014-04-09 | 奥迪康有限公司 | Hearing device with brain-wave dependent audio processing |
| CN104257380A (en) * | 2014-10-22 | 2015-01-07 | 南京邮电大学 | Electroencephalograph collecting and processing system |
| US20160320840A1 (en) * | 2015-04-30 | 2016-11-03 | Samsung Electronics Co., Ltd. | Sound Outputting Apparatus, Electronic Apparatus, and Control Method Thereof |
-
2017
- 2017-09-21 CN CN201710857819.3A patent/CN107479448B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2753290Y (en) * | 2004-11-22 | 2006-01-25 | 中国科学院心理研究所 | Event-related potential instrument for collecting human neurobiological electric signal |
| JP5219202B2 (en) * | 2008-10-02 | 2013-06-26 | 学校法人金沢工業大学 | Sound signal processing device, headphone device, and sound signal processing method |
| CN101507606A (en) * | 2008-12-09 | 2009-08-19 | 上海理工大学 | Brain evoked potential collection method |
| CN103716744A (en) * | 2012-10-08 | 2014-04-09 | 奥迪康有限公司 | Hearing device with brain-wave dependent audio processing |
| CN103494608A (en) * | 2013-10-16 | 2014-01-08 | 上海谱康电子科技有限公司 | Electroencephalogram detection signal synchronization circuit and method and electroencephalogram detection system |
| CN104257380A (en) * | 2014-10-22 | 2015-01-07 | 南京邮电大学 | Electroencephalograph collecting and processing system |
| US20160320840A1 (en) * | 2015-04-30 | 2016-11-03 | Samsung Electronics Co., Ltd. | Sound Outputting Apparatus, Electronic Apparatus, and Control Method Thereof |
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| CN107479448B (en) | 2019-11-26 |
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