TWI418338B - Brainwave monitoring device during sleeping - Google Patents

Description

Sleep brain wave monitoring device

The invention relates to a sleep brain wave monitoring device, in particular to a sleep brain wave monitoring device capable of achieving health management of a user's sleep by monitoring and analyzing a user's sleep brain wave signal in real time.

Many people have problems with poor sleep quality. In order to solve this problem, medical staff often need to collect the sleep brainwaves of patients and analyze them offline to understand the sleep situation and quality of patients. However, such an approach requires additional interpretation time and is also plagued by the diagnosis of medical personnel. In addition, the traditional off-line brainwave interpretation method not only has the disadvantage of extra interpretation time, but also cannot immediately respond to the patient's sleep wave condition, and therefore can not immediately respond to the patient's sleep situation and immediately apply relative measures. Therefore, it may be impossible to immediately adjust the corresponding medical treatment for the user's sleep situation, resulting in a decrease in the medical quality of the patient and even impairing the health of the patient.

Based on the above problems, there is a need for a sleep brainwave monitoring device capable of judging the sleep quality of a patient by immediately monitoring and analyzing the brain wave signal of the patient.

The invention provides a sleep brain wave monitoring device, which can quickly adjust the subsequent medical work content by monitoring and analyzing the brain wave signal of the patient during sleep, and omitting the cumbersome analysis of brain waves by professionals. Homework, to achieve the efficiency and convenience of brain wave interpretation, for its purpose.

In addition, since the sleep brain wave monitoring device of the present invention is a portable device, the patient can be used at home to achieve the effect of self-health management of the patient, and another purpose thereof.

In order to achieve the foregoing object, the technical means and the functions that can be achieved by the technical method include: a sleep brain wave monitoring device, comprising a signal sensing module and an operation module. The signal sensing module is for sensing a brain wave signal of a judgment time. The computing module is coupled to the signal sensing module and includes a feature value capturing unit, a brain wave phase determining unit, an arithmetic unit and a signal output port. The feature value extraction unit calculates at least one characteristic value signal of the brain wave signal. The brain wave phase determining unit receives the at least one feature value signal, and compares the at least one feature value signal with a comparison threshold value to determine one of the brain wave signal A phase signal and a B phase signal. The operation unit determines an electroencephalogram cycle mode time in which the brain wave signal is switched between the A phase signal and the B phase signal, and calculates an electroencephalogram cycle in which the brain wave cycle alternate mode time is relative to the judgment time. Alternate mode ratio. The signal output system is coupled to the arithmetic unit for outputting an output signal representing one of the brain wave cyclic alternating mode ratios.

The above and other objects, features and advantages of the present invention will become more <RTIgt; A block diagram of a sleep brainwave monitoring device in accordance with a preferred embodiment of the present invention is shown. The sleep brain wave monitoring device is preferably a portable device, and includes a signal sensing module 1, a computing module 2, a display unit 3 and a storage unit 4, wherein the computing module 2 comprises a cutting The unit 21, a feature value capturing unit 22, an electroencephalogram phase determining unit 23, an arithmetic unit 24, and a signal output port 25. The signal sensing module 1 is coupled to the cutting unit 21 of the computing module 2 . The cutting unit 21, the feature value capturing unit 22, the brain wave phase determining unit 23, the computing unit 24, and the signal output port 25 of the computing module 2 are coupled in series between the signal sensing module 1 and the display unit 3. The storage unit 4 is also coupled to the signal output port 25 of the computing module 2, and the storage unit 4 can be a memory card (SD card), a flash memory (Flash memory), a hard disk (Hard Drive) or An optical storage medium (Optical Storage) and so on.

The signal sensing module 1 senses a brain wave signal during a judgment time when the user is in a sleep state, and transmits the brain wave signal to the cutting unit 21 of the computing module 2. The structure of the signal sensing module 1 and the method by which the brain wave is sensed are understood by those skilled in the art. In addition, the sleep state of the user can be divided into four stages, a shallow sleep period of the first and second sleep stages, a deep sleep period of the third sleep stage, and a sleep period of the fourth sleep stage, and the judgment time can be any During the above four sleep stages.

The cutting unit 21 of the computing module 2 is configured to receive the brain wave signal within the determining time, cut the determining time into a plurality of unit time, and sequentially send the brain wave signals in the unit time to the feature value capture. The unit 22 is configured such that the computing module 2 processes the brain wave signals individually for each unit time. The length of the unit time is preferably 0.4 seconds (but not limited thereto), and the adjacent unit time may have a time overlap, which is preferably 50% of the unit time. For example, if the judgment time is one hour and the length of each unit time is 0.4 seconds, the cutting unit 21 cuts the judgment time into 17999 unit time, and the adjacent two unit time has 50% time. Overlap (ie 0.2 seconds).

The feature value capturing unit 22 calculates a feature value signal for each brain wave signal of the unit time. The characteristic value signal may be an average value, an average absolute error, a root mean square value, a variance number, a standard deviation, or any combination of the above values of the brain wave signal in the unit time. That is, for any unit time, the feature value extracting unit 22 calculates the feature value signal of the unit time.

The brain wave phase determining unit 23 presets a comparison threshold TH corresponding to the value of the feature value signal, and when the feature value signal is greater than the comparison threshold TH, the brain wave phase determining unit 23 determines the unit time The brain wave signal is an A phase signal; otherwise, when the eigenvalue signal is less than the comparison threshold TH, the brain wave phase determining unit 23 determines that the brain wave signal of the specific unit time is a B phase signal. In detail, the comparison threshold TH can be calculated according to the following formula: the comparison threshold TH = a characteristic threshold of the brain wave signal in the sleep stage in which the judgment time is located + K * the sleep stage in which the judgment time is located A variant of the brainwave signal.

The value threshold of the feature is similar to the feature value signal, and may be an average value, an average absolute error, a root mean square value, a variance, a standard deviation, or the above values of the brain wave signal in a specific sleep stage. Any combination and so on. For example, in an embodiment, if the judgment time is in the deep sleep period of the third sleep stage, the third sleep of the user can be used by previously recording the brain wave signal during the previous sleep process. The brain wave signal of the stage determines the threshold of the feature, and the threshold of the feature is the average value, the average absolute error, the root mean square value, the variation number, the standard deviation or any of the above values of all brain wave signals in the third sleep stage. Combination and so on. Or, in another embodiment, if the judgment time within the deep sleep period of the third sleep stage is to be determined, but the user has not previously recorded the brain wave signal in the previous sleep process for reference, The predetermined length of time is less than a predetermined time of the determination time, and the average value, the average absolute error, the root mean square value, the variance, the standard deviation, or any combination thereof of the brain wave signal within the predetermined time is regarded as the feature. threshold.

In the above formula for comparing the threshold value TH, K is a variation characteristic coefficient whose value corresponds to the first and second sleep stages is set to 1, corresponding to the third sleep stage is set to 1.5, and corresponds to the fourth sleep stage. Set to 2. In addition, the variation characteristics of the brain wave signal can be obtained by standard deviation, variation number, or other characteristic signals representing the variation characteristics of the brain wave signal. According to this, the electroencephalogram phase judging unit 23 judges the phases of the electroencephalogram signals (which belong to the A phase signal and the B phase signal) for each unit time one by one, and sends the result of the judgment to the arithmetic unit 24. Please refer to FIG. 2, which shows an example of the brainwave signal of the user. In the example of FIG. 2, the segment located between the left asterisk "*" and the right asterisk "*" of one of the brainwave signals is the A phase signal, and the brainwave signal outside the segment is It belongs to the B phase signal.

The operation unit 24 receives the output result of the brain wave phase determining unit 23, calculates a Cyclic Alternating Pattern (CAP) time (CAP time), and further calculates the CAP time relative to the judgment. The percentage value of time is used as a CAP rate, and finally an output signal is outputted by the signal output 埠25. In detail, when the phase of the brain wave signal at each unit time in the judgment time is known, the manner in which the arithmetic unit 24 calculates the CAP time is preferably as follows. The operation unit 24 first performs a correction step to check whether the duration of any B phase signal is less than an adjustment time. If the result is YES, the judgment result of the B phase signal is adjusted to the A phase signal. The adjustment time is for adjusting the false positive result of the brain wave phase judging unit 23 according to the regularity of the conventional brain wave signal, and the length of the adjustment time is preferably selected to be 2 seconds. Then, the computing unit 24 performs a cyclic alternate mode determining step of determining whether the duration of each of the B phase signals is less than a standard time. If the determination result is "Yes", the previous A phase signal and the B phase signal are The total duration is defined as a phase alternation time; if the result of the determination is "NO", the duration of the previous A phase signal and the standard time are defined as the phase alternate time, wherein the standard time is preferably set. It is 60 seconds. Thereby, the arithmetic unit 24 can sum up all the phase alternate times in the determination time to obtain the CAP time. Finally, the CAP time is divided by the judgment time to obtain the CAP ratio. In addition, the output signal outputted by the signal output port 25 indicates the CAP ratio, and the level of the CAP ratio represents the degree of sleep of the user. In detail, in general, when the CAP ratio is higher than 40%, it means that the user is in a shallow sleep state; conversely, when the CAP ratio is lower than 40%, it means that the user is deeper. In the sleep state.

Accordingly, any electronic medical instrument connected to the signal output port 25 can adjust the medical dose or medical treatment according to the output signal of the signal output 埠25, so as to quickly adjust the medical content according to the sleep brainwave detected by the instant detection. For example, when the electronic medical device connected to the signal output port 25 is a positive pressure auxiliary breathing device, the positive pressure assisted breathing device can preset at least one air pressure output level to output the signal at the output signal output 25 Thereafter, the gas pressures of various values are output corresponding to different brain wave cycle alternating mode proportional values. For example, when the ratio of the brain wave circulation alternating mode is high, indicating that the user's sleep state is relatively shallow, the positive pressure assisted breathing apparatus can increase the air pressure output level to increase the output air pressure value to promote the use. The person returned to a deeper sleep state again. Conversely, when the ratio of the brain wave circulation alternating mode is low, the positive pressure assisted breathing apparatus can lower the air pressure output level to reduce the output air pressure value, and avoid excessively consuming the oxygen storage amount of the positive pressure auxiliary breathing apparatus.

In addition, the display unit 3 connected to the signal output port 25 can receive the output signal and display the cerebro wave cyclic alternating mode ratio value calculated by the operation unit 24. In addition, the signal sensing module 1 , the brain wave phase determining unit 23 and the computing unit 24 may also be coupled to the display unit 3 and the storage unit 4 . In this way, the display unit 3 can also display the state of the brain wave signal, the switching situation between the A phase signal and the B phase signal, and the ratio of the brain wave cyclic alternating mode. At the same time, the storage unit 4 can also store the state of the brain wave signal, the switching situation between the A phase signal and the B phase signal, and the ratio of the brain wave cycle alternating mode for subsequent medical analysis and judgment. use.

According to the sleep brain wave monitoring device of the present invention, the cumbersome operation of the medical staff to analyze the brain waves afterwards can be omitted, and the effect of improving the convenience of brain wave interpretation can be achieved. In addition, since the sleep brain wave monitoring device is a portable device, the patient can be used at home to achieve the self-health management effect of the patient.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . Signal sensing module

2. . . Computing module

twenty one. . . Cutting unit

twenty two. . . Eigenvalue extraction unit

twenty three. . . Brain wave phase judgment unit

twenty four. . . Arithmetic unit

25. . . Signal output埠

3. . . Display unit

4. . . Storage unit

Figure 1 is a block diagram of a sleep brainwave monitoring device in accordance with a preferred embodiment of the present invention.

Fig. 2 is a diagram showing an example of a user brain wave signal according to a preferred embodiment of the present invention.

1. . . Signal sensing module

2. . . Computing module

twenty one. . . Cutting unit

twenty two. . . Eigenvalue extraction unit

twenty three. . . Brain wave phase judgment unit

twenty four. . . Arithmetic unit

25. . . Signal output埠

3. . . Display unit

4. . . Storage unit

Claims (8)

A sleep brain wave monitoring device includes: a signal sensing module for sensing a brain wave signal; and an operation module coupled to the signal sensing module and including a feature value a capture unit, a brain wave phase determination unit, an operation unit, and a signal output unit, wherein the feature value extraction unit calculates at least one characteristic value signal of the brain wave signal, and the brain wave phase determination unit receives the at least one The characteristic value signal, and comparing one of the A-phase signal and the B-phase signal of the brain wave signal by comparing the at least one characteristic value signal with a comparison threshold value, the operation unit determines the brain wave signal to the A-phase signal And a brainwave cycle alternate mode time switched between the B phase signal, and calculating a ratio of the brain wave cycle alternating mode time to one of the determination time of the brain wave cycle alternating mode, the signal output system is coupled to the operation a unit for outputting an output signal representing one of the brainwave cycle alternating mode ratios, wherein the determining time corresponds to one of a plurality of sleep stages, the comparison threshold value being: the determining time a characteristic threshold of the brain wave signal at the sleep stage plus a K value multiplied by a variation characteristic coefficient of the brain wave signal at the sleep stage at which the judgment time is located, and the K value is corresponding to the sleep stage One constant. The sleep brain wave monitoring device according to claim 1, further comprising a storage device coupled to the signal output port and configured to store the brain wave cycle alternating mode ratio. The sleep brainwave monitoring device according to item 1 of the patent application scope, wherein The at least one characteristic value signal is at least one of an average value, an average absolute error, a root mean square value, a variance number, and a standard deviation of the brain wave signal. The sleep wave monitoring device according to claim 1, wherein the brain wave cycle alternating mode ratio is defined as the brain wave cycle alternating mode time divided by the judgment time. The sleep brain wave monitoring device according to claim 1, further comprising a display unit coupled to the signal output port, and configured to display the brain wave cycle alternating mode ratio. The sleep brain wave monitoring device according to claim 1, further comprising a cutting unit for receiving the brain wave signal within the judgment time, and cutting the judgment time into a plurality of unit time, wherein the at least one The eigenvalue signal is a plurality of eigenvalue signals, each of the eigenvalue signals is corresponding to a unit time, and the brain wave phase determining unit determines each unit time according to the eigenvalue signal corresponding to each unit time. The brain wave signal is the A phase signal or the B phase signal, and the operation unit calculates the brain wave cycle alternating mode time in the judgment time according to the judgment result of the brain wave phase determining unit. The sleep brainwave monitoring device according to claim 6, wherein the adjacent unit time has a time overlap. The sleep wave monitoring device according to claim 7, wherein the length of the time overlap is 50% of the unit time.