JP2768196B2 - Bedtime equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed apparatus for reporting a bed sores.

[0002]

2. Description of the Related Art First, as a sleeping apparatus of this type, the present inventors have detected body movements of a sleeping person using a plurality of body movement detection means and control means, and determined that body movements were coarse and fine. We devised a bedtime device that determines a bed soreness based on body motion. FIG. 6 shows a block diagram thereof. As shown in FIG.
The signal of the body movement detected by 1e has been judged by the comparator 8 in the control means 2 for the small body movement. The determination of the fine body motion is made on condition that the output result of the body motion detecting means is within a certain range, and the result of the determination is output. As a result, the duration determined to be the slender body movement is measured by the timer 9 and the result is displayed on the display means 10, whereby it is possible to notify the bed slip position.

[0003]

The level of occurrence of body movement of the human body varies depending on the part, and there are also individual differences depending on the physique and the like. The bedsore occurs in a part where the body movement does not occur, but the manner in which the bedsore occurs also differs depending on the state of the body movement, time, and other conditions. However, in the conventional sleeping apparatus, a constant threshold value is set in the comparator of the control means, and the criterion is similarly applied to each part of the whole body. There is a problem in that an error occurs in the determination of, and it is not possible to provide high-accuracy notification of a portion where body movement does not occur, that is, a position of a bedsore.

A first object of the present invention is to determine the presence / absence of a more accurate body movement by using each part of the whole body, that is, a body movement determination threshold corresponding to a plurality of body movement detecting means as described above. It is an object of the present invention to provide a sleeping device that can make a determination and estimate a portion of a bedsore.

[0005] A second object of the present invention is to measure the continuation of the time determined to be a small body movement corresponding to a plurality of body movement detecting means, and to detect the minute body movement detected by each body movement detecting means. When the measured time exceeds a predetermined time according to the threshold level of the determination of the above, a signal is output, and information on the time and the site regarding the bedsore is provided to the caregiver.

A third object of the present invention is to provide a sleeping apparatus capable of changing the setting of a stored threshold value for body motion determination and capable of more accurately reporting a bed sores site corresponding to individual differences. is there.

[0007]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a plurality of beddings for detecting a coarse movement such as turning over of a sleeping person and a fine movement such as heartbeat and breathing. a body motion detecting means, and each of the signal converting means for processing the output signal of the body motion detecting means, it said body motion detecting means
Storage means for storing a set threshold value in response to Les, before
Corresponding to each of the cursive movement detecting means, the threshold value stored in the storing means and the output value of the signal converting means are compared, and a part of the bedding where there is a coarse movement and a fine movement of a sleeping person is provided. Judgment
At the same time, the part without coarse body motion
And a determining means for determining the value .

In order to achieve the second object , the storage means is provided for each of the plurality of body movement detecting means.
Set the setting time corresponding to the stored threshold value, and counting the duration if the determination result is fine body movement judging means, before
A timer is provided for outputting a signal when the continuation time exceeds the set time .

In order to achieve the third object, there is provided a setting value changing means for changing the setting of a plurality of threshold values stored in the storage means.

[0010]

The present invention operates as follows by the above configuration. When a human body is present on the bedding and generates coarse body motion such as turning over or fine body motion such as heartbeat or respiration, the body motion is detected by a plurality of body motion detecting means provided on the bedding and a signal is output. Each of the plurality of output signals is subjected to signal processing by signal conversion means. The storage means corresponds to each of the body movement detection means
A threshold value is stored, and the determination means includes the body movement detection means.
Corresponding to each of the threshold values stored in the storage means.
Is compared with the output value of the signal conversion means,
The part with coarse and fine body motion of the human body is determined
Then, a part without coarse body movement is determined as a bedsore part.

[0011] Further, the time measuring means may include a plurality of body movement detecting means.
According to each, according to the threshold value stored in the storage means
Time set, and the result of the judgment by the judging means is
If the duration is measured, the duration is set as described above.
Outputs a signal when the time is exceeded.

The setting of the threshold value stored in the storage means is changed by the set value changing means based on the physical characteristics such as the physique of the user.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a first embodiment of the present invention. Reference numeral 11 denotes piezoelectric elements 12a to 12e as body movement detecting means on bedding (hereinafter referred to as a bed). The piezoelectric element is formed by forming a polymer piezoelectric material such as polyvinylidene fluoride (PVDF) into a thin film and attaching a flexible electrode film to both surfaces thereof to form a tape. When a sleeping person lays down on the bed, 12a is attached to the back, 12c is attached to the waist, and 12e is attached to the foot among these body movement detecting means. Piezoelectric elements 12a to 12
The signal e is connected to the circuit unit 13.

FIG. 2 is a block diagram of the first embodiment. In FIG. 2, reference numeral 14 denotes a signal conversion unit, and reference numeral 15 denotes a relay switch so that any one signal of the body movement detection units 12a to 12e can be obtained. Reference numeral 16 allows a signal from the body movement detecting means input by the low-pass filter to pass only at a specific frequency. 17 is an amplifier, 18 is a rectifier, and 19 is an integrator. Reference numeral 20 denotes a storage unit, and reference numeral 21 denotes a determination unit.

The operation of the above embodiment will be described below. As shown in FIG. 1, the piezoelectric element is in the form of a thin film tape, so that it is easy to provide the piezoelectric element on the bed 11. In FIG. 2, when a person enters the bed 11, the piezoelectric element is deformed by vibrations caused by body movements at the time of entering the bed, turning over, and minute body movements of the heart due to heartbeats and breathing, and a voltage is generated by the piezoelectric effect. And outputs a signal. This output signal passes through a low-pass filter 16 and is amplified and rectified.
9 is integrated. FIG. 3 shows an output signal of the integrator 19 in an actual scene. As shown in the figure, there is a large output when rough body movement such as entering the bed, leaving the bed or turning over,
When the person is in the bed and is in a resting state, a low-level output is obtained due to the heartbeat of the human body and the flutter caused by breathing, and the output becomes zero when the user is out of bed. That is, as long as the human body is present on the bed 11 at bedtime, a low-level output can be obtained at least due to the above-mentioned minute movement of the human body accompanying heartbeat and respiration. Utilizing this, the determining means 21 determines whether the body movement detecting means 1
2a to 12e, and receives the information of which signal is input, fetches the thresholds Va and Vb corresponding to each body movement detecting means from the storage means 20, and outputs the signals Va and Vb from the signal converting means 14 If it is within the range,
If it is larger than Vb, it is determined that the motion is rough. By using this determination result, for example, a portion having a rough body movement and a portion having no body movement are displayed on a display, or an LED display corresponding to each part of the body is performed, thereby notifying a bed sores part without a rough body movement. Can be.

According to the above operation, the judgment threshold value corresponding to the output level of the body movement corresponding to each part of the body is stored, so that the judgment result corresponding to the body movement level of each part of the body can be obtained, and the notification of bedsores can be obtained. Also, a highly accurate one can be obtained.

Next, a second embodiment of the present invention shown in FIG. 4 will be described. Here, in addition to the first embodiment, 22
Is provided. Each of the timing means 22
Storage means 20 corresponding to each of the
A set time according to the stored threshold is set. And
If the result of the determination by the determination means 21 is the slender body movement, the duration thereof
And a signal is output when the duration exceeds the set time.
Is output. For example, a high threshold is used for a part where a large level of fluttering occurs. If not, there is a high risk of bedsores . Therefore, for the parts using the high threshold,
The fixed time is set to a short time, and a signal is output in a short time if there is no coarse movement . Conversely, for a part that uses a threshold value of a small level of fine body movement, the set time is longer than when a high threshold value is used.
Is set relatively long, and a signal is output when there is no coarse movement for a relatively long time. In addition, this output may be displayed on a display of a personal computer, for example, as information relating to the time and site to the caregiver so as to be notified.

By the above-described operation, the duration of the fine body movement exceeds a certain time, and the danger of bed soreness can be recognized along with the elapse of time. Therefore, the timing at which the caregiver causes the care-receiver to perform the body movement is instantaneous. This is effective for preventing bedsores.

Next, a third embodiment shown in FIG. 5 will be described. Here, in addition to the second embodiment, 23 setting value changing means are added. In the third embodiment, the setting value changing means 23 is added to the storage means 20. Therefore, in accordance with the physical characteristics of the sleeping person, for example, if the sleeping person is a small person, 12 e out of the threshold values stored in the storage means 20
Can be changed by the setting value changing unit 23 from the threshold value corresponding to the 12d body motion detecting unit to the threshold value of the foot unit.

With the above-described operation, the body movement can be reliably determined without any difference in the accuracy of the body movement determination depending on the sleeping person. Therefore, it is possible to provide notification of bedsore prevention that can respond to individual differences.

In this embodiment, the body movement detecting means is provided on the bed. However, the body movement detecting means may be incorporated in a bedding such as a mattress, a bed pad, a sheet, a blanket or the like.

Further, the information is passed through a bed that can be turned over or a bed that can massage a portion in contact with the floor surface or other bedding, and a portion where there is only fine movement and no rough movement occurs. On the other hand, for a part where the duration of the fine body movement exceeds a certain time, a turning over or a massage or the like having an effect equivalent to the turning over may be performed.

[0024]

As described above, according to the sleeping apparatus of the present invention, the following effects can be obtained.

Body movement detection that can detect minute vibrations generated at various parts of the body and propagated through bedding caused by the activity of the human heart or respiration as fine body movements, and body movements such as turning over as coarse body movements. By using the means, the threshold value of the body movement determination corresponding to each part of the body in each body part to be generated is stored in the storage unit, and the determination is performed using the threshold value, so that more reliable body movement information can be obtained. can get. That is, it is possible to provide a more accurate notification of a portion where there is no body movement, that is, a portion of a bedsore.

Further, since the duration of the flutter movement is measured in accordance with the site, the caregiver can know the timing at which the caregiver should perform care so as not to cause bedsores on the care recipient, which is more effective information for the caregiver. Is obtained.

Also, since the threshold value for body motion determination can be changed, bedsore notification corresponding to the physical individual difference of the care receiver is possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a bed apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the apparatus.

FIG. 3 is an output waveform diagram from an integrator of the apparatus.

FIG. 4 is a block diagram of a sleeping apparatus according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a sleeping apparatus according to a third embodiment of the present invention.

FIG. 6 is a block diagram of a conventional bed apparatus.

[Explanation of symbols]

 12 body movement detecting means 14 signal converting means 20 storing means 21 judging means 22 clocking means 23 setting value changing means

Continuation of the front page (56) References JP-A-4-272746 (JP, A) JP-A-4-272744 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61B 5 / 11

Claims (3)

(57) [Claims] 1. A plurality of body movement detecting means provided on a bedding for detecting a coarse movement such as turning over of a sleeping person and a fine movement such as a heartbeat or breathing, and an output signal of each of the body movement detecting means is provided. Each of the signal conversion means to be processed and the
Storage means for storing a threshold value set accordingly ;
Corresponding to each of the detection means, the threshold value stored in the storage means and the output value of the signal conversion means are compared to determine a part of the bedding where the sleeping person has coarse movement and fine movement, And a determining means for determining a portion having no rough body movement as a bedsore portion. Wherein corresponding to each of the plurality of body motion detecting means
Setting time according to the threshold value stored in the storage means.
2. The sleeping device according to claim 1, further comprising a timer for setting and, if the result of the judgment by the judging means is a fine body movement, measuring the duration thereof and outputting a signal when the duration exceeds the set time . 3. The sleeping apparatus according to claim 1, further comprising a set value changing means for changing a setting of the plurality of threshold values stored in the storage means.