JP2780464B2 - Sleep evaluation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleep evaluation device for evaluating the quality of sleep.

Conventional technology Conventionally, this type of sleep evaluation device, as represented by, for example, a polysomnography device, attaches an electrode to a human body, and filters a minute bioelectric potential such as an electroencephalogram, an eyeball potential, a myoelectric potential,
Sleep was evaluated by recording on a recorder via an amplifier or the like and determining the sleep stage based on the criteria.
The work of determining the sleep stage is often performed by visual observation of the data. However, a device that processes the brain wave data with a frequency analyzer or the like to determine the sleep stage is also considered.

Problems to be Solved by the Invention However, the sleep evaluation device of the above technology has a high cost of the device, requires the electrodes to be attached to the human body, and requires field work such as occupational health and home health care. However, there is a problem that it is not easy to use and is not practical.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a practical sleep evaluation device which can be easily used even in fields requiring field work such as occupational health and home health management.

Means for Solving the Problems To solve the above problems, the sleep evaluation device of the present invention is:
Body movement detecting means for detecting body movement at bedtime, first calculating means for calculating the number of body movements per unit time based on an output signal of the body movement detecting means, and an output signal of the body movement detecting means A second calculating means for calculating an average time of the body motion appearance interval based on the first calculating means; and a display means for displaying output signals of the first calculating means and the second calculating means.

Operation The sleep evaluation device of the present invention operates as follows by the above configuration. That is, when the user goes to bed, the body movement until the user wakes up is detected by the body movement detection means. Based on the detected body movement data, the first calculation means determines the number of body movements per unit time by the second calculation means. In, the average time of the body motion appearance interval is calculated, and the calculated data is displayed by the display means.

Hereinafter, a sleep evaluation device according to a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of the embodiment, and FIG. 2 is a block diagram of the embodiment. In FIGS. 1 and 2, reference numeral 1 denotes a body movement detecting means, which is a flexible piezoelectric element 2, a filter circuit 3, an amplifier circuit 4, a rectifier circuit 5, an integration circuit 6, a comparison circuit 7, a body movement storage circuit. 8. Here, the piezoelectric element 2 is provided on the mattress 14 of the bed. The body motion storage circuit 8 stores the time at which the body motion occurred. 9 is a first calculating means, 10 is a second calculating means, 11 is a display means, a display 12, a display button
It has 13 and is fixed to the bed.

The operation of the above configuration will be described below. When the user enters the bed and the body motion occurs, the piezoelectric element 2 is deformed to generate a voltage, and only a predetermined frequency component is extracted from the generated signal by the filter circuit 3 and then amplified, rectified and integrated. , Is compared with a predetermined threshold value Vo by the comparison circuit 7. Here, the output V from the integration circuit 6 is Vo
In the above case, the output signal of the comparison circuit 7 is set to the Hi state assuming that the body motion has occurred, and if V is less than Vo, the output signal of the comparison circuit 7 is set to the Lo state assuming that no body motion has occurred. The body motion storage circuit 8 sequentially stores the time when the output signal of the comparison circuit 7 becomes Hi state. The above operation is continued until the user presses the display button 13.

By the way, between body movement and feeling of sleep, it is recognized that there is a tendency that when the awakening feeling is refreshing, the number of body movements per unit time tends to be small and the average time of body movement appearance intervals tends to be long. Based on this knowledge, sleep can be evaluated from the number of body movements per unit time and the average time of body movement appearance intervals.
That is, when the user presses the display button 13 at the time of getting up, the first calculating means 9 changes the number of times of body movement per unit time No based on the body movement data stored in the body movement storage circuit 8 to the second number. The calculating means 10 calculates the average time To of the body motion appearance interval. The calculated data is displayed on the display 12 by the display means 11. At this time, as shown in FIG.
The display 12 displays two-dimensional coordinates using the number of body movements N per unit time and the average time T of body movement appearance intervals as vertical and horizontal axes, respectively, and further clearly shows the sleep area G. The data No. and To are displayed in these coordinates (P in the figure). The user can evaluate the sleep of the night by seeing whether or not the coordinates P are in the sleep area G.

According to the above operation, according to the sleep evaluation device of the present embodiment,
Based on events that are relatively easy to detect, such as body movements, it is possible to evaluate sleep based on simple indices such as the number of body movements per unit time and the average time between body movement appearance intervals. There is an effect that sleep evaluation can be performed in a practical form. In particular, a practical sleep evaluation device that can be easily used in fields requiring field work such as occupational health and home health management can be realized.

Second Embodiment A sleep evaluation device according to a second embodiment of the present invention will be described below. This embodiment is different from the above-described embodiment in that, as shown in FIG. 4, the display means 11 includes an input unit 15 which allows a user to input a sleep degree based on a subjective evaluation, A first storage unit 16 that stores the obtained sleep degree, the number of body movements per unit time at that time, and an average time of body movement appearance intervals, and stores a sleep area G based on data stored in the first storage unit 16. And a learning unit 17 for learning. Here, the sleep level is input, for example, using the sleep level as a 5-level scale.

With the above configuration, when the user inputs a sleep level based on a subjective evaluation when the user wakes up, the input sleep level, the number of body movements per unit time at that time, and the average time of body movement appearance intervals are stored. Then, the sleep area G is learned based on the stored data.

With the above operation, the sleep area G according to the user is set by learning, so that there is an effect that the evaluation of sleep is improved as compared with the above embodiment.

Third Embodiment A sleep evaluation device according to a third embodiment of the present invention will be described below. This embodiment is different from the above embodiment in that the display means 11
Is a second storage unit that stores the date of bedtime, the number of body movements per unit time at that time, and the average time of body movement appearance intervals
18 in that the number of body movements per unit time, the average time of body movement appearance intervals, sleep days, and the like can be displayed in chronological order.

As a result, sleep can be evaluated in chronological order, which is effective in terms of sleep management and health management. In this case, the second storage unit 18 may be constituted by a storage medium capable of storing and managing personal data such as an IC card. There is a practical effect that analysis can be performed by the above method.

In the above embodiment, the body movement was detected by the piezoelectric element.
A configuration in which a sensor for detecting a change in capacitance is provided on a mattress, or a configuration in which an infrared sensor, an ultrasonic sensor, or the like is installed on a headboard of a bed to detect body movement may be adopted.

Effect of the Invention As described above, in the sleep evaluation device of the present invention, based on an event that is relatively easy to detect, such as body motion during sleep, a simple evaluation such as the number of body motions per unit time and the average time of body motion appearance intervals is performed. It is possible to evaluate sleep based on the index,
There is an effect that sleep evaluation can be performed in a more practical form than before. In particular, it can be easily used and practical in fields requiring field work such as occupational health and home health management.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sleep evaluation device according to an embodiment of the present invention, and FIG.
FIG. 3 is a block diagram of the device, FIG. 3 is a perspective view of display means of the device, and FIG. 4 is a block diagram of a sleep evaluation device according to a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Body motion detection means, 2 ... Piezoelectric element, 3 ... Filter circuit, 4 ... Amplifier circuit, 5 ... Rectifier circuit, 6 ... Integration circuit, 7 ... Comparison circuit, 8 ... Body motion storage Circuit 9, First
... Second computing means, 11... Display means.

Claims (6)

(57) [Claims] A body movement detecting means for detecting a body movement at bedtime;
A first calculating means for calculating the number of body movements per unit time based on an output signal of the body movement detecting means, and a second calculating means for calculating an average time of body movement appearance intervals based on an output signal of the body movement detecting means. Calculating means, the first calculating means and the second
And a display means for displaying an output signal of the calculating means. 2. The sleep evaluation device according to claim 1, wherein the display means performs a two-dimensional display on the display using the number of body movements per unit time and the average time of body movement appearance intervals as vertical and horizontal axes, respectively. 3. The display device according to claim 1, wherein said display means clearly indicates a sleep area.
Or the sleep evaluation device according to 2. 4. A display means for inputting a sleep level based on a subjective evaluation by a user, the input sleep level, the number of body movements per unit time and body movement at that time. The sleep evaluation device according to claim 1 or 2, further comprising: a first storage unit that stores an average time of appearance intervals; and a learning unit that learns a sleep area based on data stored in the first storage unit. 5. The display means has a second storage unit for storing the date of bedtime, the number of body movements per unit time at that time, and the average time of body movement appearance intervals, and the number of body movements per unit time. The sleep evaluation device according to claim 1, wherein the sleep evaluation device can display the average time of the body motion appearance interval in a time series. 6. The sleep evaluation device according to claim 5, wherein the second storage unit is a storage medium capable of storing and managing personal data such as an IC card.