JPS6397147A - Sleeping judge apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a sleep onset determination device, and more particularly to a sleep onset determination device that determines whether a stable state of sleep has been reached based on pulse waves.

[Background technology] In today's increasingly complex society, psychological and mental stress such as anxiety, dissatisfaction, anger, and irritability is increasing.
These stresses have become a cause of insomnia and the like.

As a way to relieve such stress and encourage sleep, it is effective to give the user a comfortable level of stimulation such as sound stimulation or vibration stimulation, and to adjust the temperature and humidity in the room or bed to a comfortable level. It is known to be effective. However, conventional sleep aid devices that use sound and vibration, or devices that control the temperature and humidity inside the room or bed, have no means of determining whether the user has reached a stable state of sleep. Therefore, stimuli such as sounds and vibrations to induce sleep may continue to be applied even after falling asleep, or may stop before falling asleep.

In addition, when falling asleep, the temperature and humidity of the room and bed affect the temperature and humidity, especially the time from the time of going to bed to a stable sleep, and the time when stable sleep is reached and metabolic rate decreases and external stimulation The period when it becomes difficult to feel the temperature is a comfortable temperature,
Since humidity varies, it is necessary to adjust the temperature and humidity according to the sleep state to promote sleep onset, but since it has not been possible to identify the sleep onset state in the past, it has been difficult to adjust the temperature and humidity appropriately. It was something that didn't exist. Therefore, despite using devices that are supposed to help you fall asleep,
There was a risk that this would actually interfere with falling asleep.

As a result of research, the present inventor obtained the knowledge that as the fI sleep state stabilizes, the variance of the integral value of the pulse wave level sampled at regular intervals becomes larger. This is an attempt to determine the

[Object of the Invention] The present invention was made in view of the above, and its purpose is to achieve a stable state of sleep by calculating the dispersion of the integral value of the pulse wave level. An object of the present invention is to provide a sleep onset determination device that determines whether sleep onset has been reached.

[Disclosure of the Invention] (Structure) The sleep onset determination device according to the present invention includes a pulse wave sensor that detects the level of a pulse wave, an integrating circuit that integrates the level of the pulse wave sampled at regular intervals, and a pulse wave sensor that detects the level of the pulse wave. It is equipped with an arithmetic and judgment circuit that calculates the variance of the integral value and determines that sleep has occurred when the variance gradually increases and exceeds a predetermined value, and the integral value of the pulse wave level sampled at regular intervals. The state of falling asleep can be determined by finding the variance of .

(Example) First, the basic principle of the present invention will be explained.

Figure 2 shows the relationship between the integral value of the pulse wave level sampled at regular intervals and the posture during sleep and wakefulness. The integral value of the pulse wave level is larger than that of
It can also be seen that there is a large variation. Furthermore, Figure 3 shows the dispersion of the integral value of the pulse wave level and sleep depth.During sleep, as the sleep depth becomes deeper and a stable sleep state is achieved, the dispersion of the integral value of the pulse wave level is shown. It can be seen that the amount increases gradually. From the above results, the pulse wave level is sampled at regular intervals to find its integral value, the variance of the integral value is calculated, and the values before and after the variance arranged in time series are compared, and it is found that the variance gradually increases. If it becomes equal to or higher than a certain value, it can be determined that a stable sleep state has been reached.

A circuit configuration based on the following two principles is shown in FIG.

The pulse wave sensor 1 is attached to the human body with a band or the like so that it can be attached and detached freely.For example, a light emitting element (non-visible) is placed on one side of the fingernail or the abdomen, The blood flow (pulse wave) is detected by a light receiving element placed on the opposite side of the element, and an electrical signal corresponding to the pulse wave is obtained. The output of the pulse wave sensor 1 is input to an integrating circuit 2, and the pulse wave level sampled at fixed time intervals is integrated. The integral value of the pulse wave level, which is the output of the integrating circuit 2, is input to the calculation/determination circuit 3, and the variance thereof is determined. The calculation g-t'q determining circuit 3 memorizes the obtained variance as appropriate and compares it with the variances before and after chronologically arranged, and when the variance gradually increases and exceeds a predetermined value, it is determined that sleep has occurred. . The calculation/judgment circuit 3 is provided with an output section 4 .

Therefore, when the dispersion which is the output of the arithmetic judgment circuit 3 is less than a predetermined value, an output corresponding to the dispersion is obtained, and when the dispersion exceeds a predetermined value, the output section 4 stops outputting.
For example, in a sleep onset promoting device that provides sound stimulation or vibration stimulation, it would be possible to control the strength and pattern of stimulation depending on the depth of sleep, or stop stimulation at an appropriate timing depending on the sleep state. It is possible.

That is, the sleep onset promoting device can be feedback-controlled in accordance with the sleep state of the user, and the effectiveness of the sleep onset promoting device can be enhanced.

On the other hand, when used in a device that controls the temperature and humidity in a room or in a bed, the output section 4 is configured to determine the state of heat sensation and the depth of sleep based on the integral value of the pulse wave level and the dispersion of the integral value. It is possible to adjust the temperature and humidity inside the room or bed to create an appropriate environment.
As a result, falling asleep can be promoted.

[Effects of the Invention] As described above, the present invention includes a pulse wave sensor that detects the level of a pulse wave, an integrating circuit that integrates the level of the pulse wave sampled at regular intervals, and a dispersion of the integral value of the pulse wave level. It is equipped with an arithmetic judgment circuit that calculates the dispersion and determines that it is time to fall asleep when the dispersion gradually increases and exceeds a predetermined value. Since the state of falling asleep can be determined based on the user's sleep state, this device can be used to feedback control devices that promote sleep onset and temperature and humidity control devices in response to the user's sleep state, resulting in optimal sleep onset. It has the advantage of being able to create a comfortable environment and obtain a high sleep-promoting effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are detailed explanatory diagrams of the present invention. ] is a pulse wave sensor, 2 is an integrating circuit, and 3 is a calculation/judgment circuit. Agent Patent Attorney Ishi 1) Ai Nanakasago 1η; Sue

Claims (1)

[Claims] (1) A pulse wave sensor that detects the level of the pulse wave, an integrating circuit that integrates the level of the pulse wave sampled at regular intervals, and a dispersion of the integral value of the pulse wave level that is calculated and gradually increases to a predetermined value. A sleep onset determination device comprising: an arithmetic determination circuit that determines that sleep has occurred when the above conditions occur.