CN113359541A - Multi-sensory-mode continuous attention monitoring system and method - Google Patents
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Abstract
The invention discloses a multi-sensory-mode continuous attention monitoring system and a method, comprising front-end monitoring equipment, a server and a display terminal; the front-end monitoring equipment is connected with the server and used for setting and presenting visual stimulation pictures or auditory stimulation sounds, receiving key response and collecting state video information of a testee in the monitoring process; the server carries out data analysis according to the collected user response signals and the video information, and is connected with the display terminal; the display terminal is provided with a graphical display interface for replaying the video of the state in the monitoring process of the user; the invention has simple structure and convenient use, comprises two modes of vision and hearing, monitors the tested state by a video method at the same time of monitoring, and ensures the effectiveness of the test; the periodic signal percentage is provided as an index for monitoring continuous attention, the multi-movement condition of the testee in different periods is described, more comprehensive and detailed information can be provided for the monitoring of the continuous attention, and simultaneous monitoring of multiple persons is realized.
Description
Technical Field
The invention relates to the field of cognitive ability monitoring, in particular to a multi-sensory-mode continuous attention monitoring system and method.
Background
The continuous attention refers to the ability to focus attention on a specific target for a long time, and has important significance for the learning and the life of people. The vehicle driving, the military training and the like all need continuous attention participation, and in addition, many neuropsychiatric diseases have symptoms of continuous attention deficit, such as attention deficit hyperactivity disorder, light brain trauma and the like. Therefore, the continuous attention of accurate monitoring and evaluation has very important application value. For continuous assessment, the traditional method is mainly a scale questionnaire, which is subjective and the test result is subject to deviation. Some behavior testing methods have also been proposed in recent years in the research field, however, these behavior tests have the following problems:
firstly, a single visual mode test is adopted, and monitoring of continuous attention of other modes, such as an auditory mode, is omitted;
secondly, the tested indexes mainly relate to the error rate of target reaction in the monitoring process, however, more and more researches show that the retesting reliability of the error rate is low, so that the accuracy of related technologies is low;
thirdly, whether the user is tested according to the requirements is monitored without adopting technical means;
fourthly, only one person can be tested;
therefore, the prior art still has great limitation in application.
For example, chinese patent CN202010075211.7 discloses an attention assessment method and system. Based on different attention levels of different users, the attention of the subjects is scored intelligently, but the method only adopts a single visual mode test, and the test results have larger deviation.
Disclosure of Invention
The invention mainly solves the problems of single sensory modality, low accuracy and low applicability of continuous attention monitoring in the prior art; the multi-sensory-mode continuous attention monitoring system and method are simple in structure and convenient to use, and can be used for monitoring the fluctuation condition of the continuous attention of a user.
The technical problem of the invention is mainly solved by the following technical scheme: a multi-sensory-mode continuous attention monitoring system comprises front-end monitoring equipment, a server and a display terminal; the front-end monitoring equipment is connected with the server and used for setting and presenting visual stimulation pictures or auditory stimulation sounds, receiving key response and collecting video information of the state of a testee in the monitoring process; the server carries out data analysis according to the collected user response signals and the video information, and is connected with the display terminal; the display terminal is provided with a graphical display interface, plays back videos of states in a user monitoring process, sets a linked list corresponding to the color and the reaction time fluctuation values, and visually displays the different reaction time cycle fluctuation values in different modes with different colors. When the system is set as a front-end monitoring device, the front-end monitoring device is directly connected with a server, when a plurality of front-end monitoring devices are set, one more gateway device can be set, the plurality of front-end monitoring devices transmit data to the gateway device, the gateway device transmits the data to a data analysis end after concentrating the data, the front-end monitoring devices transmit reaction keys and reaction time numbers of a testee to the server, the server analyzes the data, the continuous attention condition of the testee is analyzed periodically and displayed visually through a display terminal, the monitoring person can judge the continuous attention condition of the testee by observing the visual graph displayed by the display terminal through visually displaying the visual graph of the visual graph displayed by the display terminal when reacting under visual and auditory modes of the testee with different periods, and the state of the testee is recorded in a video screen mode while monitoring, so that the test reliability is high. The evaluation method of periodic fluctuation in reaction time is adopted, so that the test result is more comprehensive.
Preferably, the front-end monitoring device comprises a reactor unit, a video monitoring unit, a stimulation presenting unit, a central processing unit, a storage unit, a data transmission unit, a human-computer interaction unit, a power supply battery and a battery management unit; the reactor unit is used for detecting a subject reaction key and is connected with the central processing unit; the video monitoring unit is used for collecting body state information in the test process of a subject and is connected with the central processing unit; the stimulation presenting unit is used for presenting stimulation of visual or auditory modalities according to a user setting mode and is connected with the central processing unit; the central processing unit consists of one or more microprocessors and is used for reading and recording the stimulus presentation time, the reactor response and the response triggering time and the video information acquired by the monitoring camera; the central processing unit is connected with the server through the data transmission unit; the storage unit is connected with the central processing unit; the human-computer interaction unit is connected with the central processing unit; the power supply battery supplies power to the central processing unit, the reactor unit and the video monitoring unit, and is connected with the battery management unit; the battery management unit is connected with the central processing unit. And the multi-sensory-mode test of the tested personnel is realized through the reactor unit and the video monitoring unit.
Preferably, the data transmission unit includes a wired transmission unit and a wireless transmission unit, the wired transmission unit includes USB transmission, and the wireless transmission unit includes WIFI transmission or bluetooth transmission. The reaction key is transmitted to the server through wireless transmission, and the reaction time and the state video digital signals are transmitted to the server, so that the sensor is more convenient to install, a wire is not required, and meanwhile, the cost is effectively reduced.
Preferably, the human-computer interaction unit comprises a plurality of keys and a plurality of indicator lights, and the indicator lights comprise an equipment power supply indicator light, an equipment running state indicator light, a network connection state indicator light and a data receiving and transmitting state indicator light. Set up the warning light, the stability that suggestion equipment began to get into operating condition and equipment operating condition, when equipment broke down, can be better find the position that equipment broke down, makes things convenient for equipment maintenance.
A multi-sensory-modality continuous attention monitoring method comprises the following steps:
step S1: connecting a front-end monitoring device, setting a monitoring mode and related parameters, and completing monitoring under visual and auditory modalities by a subject;
step S2: the server receives the response data transmitted by the stimulation presentation equipment and performs data analysis, and the analysis result is graphically and visually displayed through the display terminal;
step S3: and performing continuous attention evaluation according to the graph displayed by the display terminal.
Preferably, in step S2, the method for the server to analyze the data includes:
step S21: calculating reaction time according to the stimulus presentation time point and the reaction time point, and forming a time domain signal for the reaction time in each single mode testing process;
step S22: performing band-pass filtering on the time domain signals in each mode at the interval of 0.05 Hz to obtain reaction time signals in different periods, and calculating the signal change percentage according to the filtered reaction time data of each frequency band;
step S23: calculating the average value of the change percentage of the visual reaction time and the auditory reaction time for each frequency band to obtain the fluctuation condition of the reaction time of different periods;
step S24: and displaying the signal change percentage of each frequency band reaction time in each mode and the comprehensive signal percentage of each frequency band reaction time in the two modes in a graphical mode respectively.
Preferably, the analysis method of the band-pass filtering in step S22 is as follows:
wherein: eta (t) ═ e-t/2(ii) a Epsilon is a band-pass width expansion parameter; omegaKThe modulation parameters of the band-pass center frequency are k equal to 1,2, …, N is the number of the set frequency band units,
for the signal in response, the percent change in signal was calculated as:
wherein: xiIs the signal density at a point in time, n is the wholeThe number of time-domain time points, μ, is the mean of the filtered time series.
The invention has the beneficial effects that: (1) the continuous attention system provided by the invention is equipment for detecting and evaluating the continuous attention of a person, has a simple structure, is convenient to use, comprises two modes of vision and hearing, monitors the state of the person to be tested by a video method while monitoring, and ensures the validity of the test; (2) the periodic signal percentage is provided as an index for monitoring continuous attention, the multi-movement condition of the testee in different periods is described, more comprehensive and detailed information can be provided for the monitoring of the continuous attention, and simultaneous monitoring of multiple persons is realized.
Drawings
Fig. 1 is a block diagram of a continuous attention monitoring system according to a first embodiment of the present invention.
Fig. 2 is a block diagram of a front-end monitoring device according to a first embodiment of the present invention.
Fig. 3 is a schematic flow chart of a data analysis method according to a first embodiment of the present invention.
In the figure, 1, a front-end monitoring device, 2, a server, 3, a display terminal, 4, a reactor unit, 5, a video monitoring unit, 6, a stimulation presenting unit, 7, a central processing unit, 8, a storage unit, 9, a data transmission unit, 10, a man-machine interaction unit, 11, a power supply battery and 12, a battery management unit are arranged.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The first embodiment is as follows: a multi-sensory-modality continuous attention monitoring system is shown in fig. 1 and comprises a front-end monitoring device 1, a server 2 and a display terminal 3; the front-end monitoring device 1 is used for collecting key reaction and video information, and the front-end monitoring device 1 is connected with the server 2; the server 2 analyzes data according to the collected reaction and the reaction time, and the server 2 is connected with the display terminal 3; the display terminal 3 is provided with a graphical display interface, can select the video state monitoring data of any monitoring device to display in real time or display in a playback mode, is provided with a linked list corresponding to the reaction time in colors, and visually displays different periodic fluctuation conditions in the reaction time under different modes in different colors.
As shown in fig. 2, the front-end monitoring device 1 includes a reactor unit 4, a video monitoring unit 5, a stimulus presentation unit 6, a central processing unit 7, a storage unit 8, a data transmission unit 9, a human-computer interaction unit 10, a power supply battery 11 and a battery management unit 12; the reactor unit 4 is used for detecting reaction, and the reactor unit 4 is connected with the central processing unit 7; the video monitoring unit 5 is used for recording state videos, and the video monitoring unit 5 is connected with the central processing unit 7; the stimulation presenting unit 6 is used for presenting stimulation signals of a fixed sensory modality according to user settings, and is connected with the data central processing unit 7; the central processing unit 7 consists of one or more microprocessors and is used for reading the reaction and reaction time points detected by the reactor unit 4 and the time points of the state video recorded by the video monitoring unit 5 and the stimulus presentation of the stimulus presentation unit 6, and the central processing unit 7 is connected with the server 2 through a data transmission unit 9; the storage unit 8 is connected with the central processing unit 7; the data transmission unit 9 is connected with the central processing unit 7; the man-machine interaction unit 10 is connected with the central processing unit 7; the power supply battery supplies power for the central processing unit 7, the reactor unit 4 and the video monitoring unit 5, and the power supply battery 11 is connected with the battery management unit 12; the battery management unit 12 is connected with the central processing unit 7, the data transmission unit 9 comprises a wired transmission unit and a wireless transmission unit, the wired transmission unit comprises USB transmission, and the wireless transmission unit comprises WIFI transmission or Bluetooth transmission.
The human-computer interaction unit 10 comprises a plurality of keys and a plurality of indicator lights, wherein the indicator lights comprise a device power supply indicator light, a device running state indicator light, a network connection state indicator light and a data receiving and sending state indicator light.
A multi-sensory-modality continuous attention monitoring method comprises the following steps:
step S1: the front end monitoring unit is connected with the testing unit and used for setting testing parameters. In visual modality monitoring, the subject presses the left or right key of the key press according to "<" or ">". In auditory modality monitoring, the subject presses the left or right key of the keypad according to 90 db pure tone at "1000 hz" or "2000 hz".
Step S2: the server 2 receives the pressure value detected by each sensor and performs data analysis, and the analysis result is graphically and visually displayed through the display terminal 3; as shown in fig. 3, the method of data analysis comprises the steps of:
step S21: calculating reaction time according to the stimulus presentation time point and the reaction time point, and forming a time domain signal for the reaction time in each single mode testing process;
step S22: performing band-pass filtering on the time domain signals in each mode during reaction at intervals of 0.05 Hz to obtain reaction signals with different periods; calculating the signal change percentage according to the reaction time data after each frequency band filtration, wherein the calculation method of the band-pass filtration comprises the following steps:
wherein: eta (t) ═ e-t/2(ii) a Epsilon is a band-pass width expansion parameter; omegaKThe modulation parameters of the band-pass center frequency are k equal to 1,2, …, N is the number of the set frequency band units,
for the signal in response, the percent change in signal was calculated as:
wherein: xiIs the signal density of the time points, n is the number of the time points of the whole time domain, mu is the mean value of the filtered time sequence;
step S23: the average of the percent change in visual and auditory responses was calculated for each band. So as to obtain the fluctuation conditions of different periods of reaction time;
step S24: the signal change percentage of each frequency band reaction time in each mode and the comprehensive signal percentage of each frequency band reaction time in the two modes are respectively displayed in a graphical mode.
Step S3: and performing continuous attention evaluation judgment according to the result displayed by the display terminal 3.
The second embodiment, a multi-sensory-modality continuous attention monitoring system, the first embodiment is compared with the first embodiment, the difference lies in that the first embodiment sets up a plurality of front-end monitoring devices 1, a gateway device is added at the same time, the plurality of front-end monitoring devices 1 are connected with the gateway device, the gateway device is connected with a server 2, a plurality of display areas are set up in a graphical display interface of a display terminal 3, the collected data of different front-end monitoring devices 1 are visually displayed, each front-end monitoring device 1 is numbered, when the plurality of front-end monitoring devices 1 transmit data to the gateway device at the same time, the data and the serial number of the device are transmitted to the server 2 after corresponding, and the server 2 displays the data of the corresponding serial number through the display interface after analyzing the data.
In specific application, when a single individual is continuously monitored, reaction and reaction time points detected by the key device unit 4 are converted into digital signals and are directly connected with the server 2 through the data transmission unit 9, reaction time fluctuation of different modes and different periods is visually displayed through a data analysis method, in a certain period of time in a real-time monitoring process, attention of a testee is not concentrated, the reaction time fluctuation is increased, if the attention is not concentrated caused by an accidental event, low-frequency fluctuation in the reaction time is increased, and if the attention is not concentrated caused by a frequent event, high-frequency fluctuation in the reaction time is increased; the image visually displayed on the graphical display interface of the display terminal 3 changes, the attention fluctuation of a person is periodic according to the scientific research result, and a monitor can accurately judge the continuous attention condition and the comprehensive condition of continuous attention of different sensory modalities of a testee by observing the image change periodicity of the display terminal 3; when monitoring many people, need set up a plurality of front end monitoring facilities 1, install respectively, number every monitoring facilities, concentrate the data that monitoring facilities detected through the gateway and then give server 2 with concentrated data transfer for data processing's time, increase the timeliness of data processing and monitoring.
The continuous attention monitoring system is equipment for detecting the continuous attention of people, has a simple structure, is convenient to use, can collect the response of a user to a stimulation signal under different sensory modalities, and ensures the effectiveness of the test through video monitoring; the system provides the periodic reaction time percentage fluctuation amplitude as an index for monitoring continuous attention, and the attention fluctuation conditions of different periods of the testee are described, so that more comprehensive and detailed information can be provided for attention monitoring.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (7)
1. A multi-modality continuous attention monitoring system, comprising: the system comprises front-end monitoring equipment, a server and a display terminal;
the front-end monitoring equipment is connected with the server and used for setting and presenting visual stimulation pictures or auditory stimulation sounds, receiving key response and collecting video information of the state of a testee in the monitoring process;
the server carries out data analysis according to the collected user response signals and the video information, and is connected with the display terminal;
the display terminal is provided with a graphical display interface, plays back videos of states in a user monitoring process, sets a linked list corresponding to the color and the reaction time fluctuation values, and visually displays the different reaction time cycle fluctuation values in different modes with different colors.
2. The multi-modality continuous attention monitoring system of claim 1,
the front-end monitoring equipment comprises a reactor unit, a video monitoring unit, a stimulation presenting unit, a central processing unit, a storage unit, a data transmission unit, a man-machine interaction unit, a power supply battery and a battery management unit; the reactor unit is used for detecting a subject reaction key and is connected with the central processing unit; the video monitoring unit is used for collecting body state information in the test process of a subject and is connected with the central processing unit; the stimulation presenting unit is used for presenting stimulation of visual or auditory modalities according to a user setting mode and is connected with the central processing unit; the central processing unit consists of one or more microprocessors and is used for reading and recording the stimulus presentation time, the reactor response and the response triggering time and the video information acquired by the monitoring camera; the central processing unit is connected with the server through the data transmission unit; the storage unit is connected with the central processing unit; the human-computer interaction unit is connected with the central processing unit; the power supply battery supplies power to the central processing unit, the reactor unit and the video monitoring unit, and is connected with the battery management unit; the battery management unit is connected with the central processing unit.
3. The multi-modality continuous attention monitoring system of claim 2,
the data transmission unit comprises a wired transmission unit and a wireless transmission unit, the wired transmission unit comprises USB transmission, and the wireless transmission unit comprises WIFI transmission or Bluetooth transmission.
4. A multi-sensory modality continuous attention monitoring system according to claim 2 or 3,
the man-machine interaction unit comprises a plurality of keys and a plurality of indicator lamps, and the indicator lamps comprise an equipment power supply indicator lamp, an equipment running state indicator lamp, a network connection state indicator lamp and a data receiving and sending state indicator lamp.
5. Multi-sensory-modality continuous attention monitoring method, which is applied to the multi-sensory-modality continuous attention monitoring system according to any one of claims 1 to 4, characterized by comprising the steps of:
step S1: connecting a front-end monitoring device, setting a monitoring mode and related parameters, and completing monitoring under visual and auditory modalities by a subject;
step S2: the server receives the response data transmitted by the stimulation presentation equipment and performs data analysis, and the analysis result is graphically and visually displayed through the display terminal;
step S3: and performing continuous attention evaluation according to the graph displayed by the display terminal.
6. The multi-modality continuous attention monitoring method of claim 5,
in step S2, the method for the server to analyze the data includes the following steps:
step S21: calculating reaction time according to the stimulus presentation time point and the reaction time point, and forming a time domain signal for the reaction time in each single mode testing process;
step S22: performing band-pass filtering on the time domain signals in each mode at the interval of 0.05 Hz to obtain reaction time signals in different periods, and calculating the signal change percentage according to the filtered reaction time data of each frequency band;
step S23: calculating the average value of the change percentage of the visual reaction time and the auditory reaction time for each frequency band to obtain the fluctuation condition of the reaction time of different periods;
step S24: and displaying the signal change percentage of each frequency band reaction time in each mode and the comprehensive signal percentage of each frequency band reaction time in the two modes in a graphical mode respectively.
7. The multi-modality continuous attention monitoring method of claim 6,
the analysis method of the bandpass filtering in step S22 includes:
wherein: eta (t) ═ e-t/2(ii) a Epsilon is the band-pass width expansion parameter；ωKThe modulation parameters of the band-pass center frequency are k equal to 1,2, …, N is the number of the set frequency band units,
for the signal in response, the percent change in signal was calculated as:
wherein: xiN is the number of time points in the whole time domain, and mu is the mean value of the filtered time series.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242077A1 (en) * | 2021-05-19 | 2022-11-24 | 杭州师范大学 | Multi-sensory-modality sustained attention monitoring system and method |
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| WO2022242077A1 (en) | 2022-11-24 |
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