JP3303397B2 - 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 The inventor of the present invention has previously described a sleeping apparatus of this type using a plurality of body movement detecting means and control means to detect body movements of a sleeping person and to respond to each of the body movement detecting means. A sleeping device is provided that has a storage part storing a determination threshold value, determines body movements as coarse body movements and fine body movements, and reports a bed sore. FIG.
The block diagram is shown in FIG. As shown in this figure, the body motion signals detected by the body motion detecting means 1a to 1e are processed by the signal converting means 2. Then, using the threshold values corresponding to each of the body motion detection means stored in the storage means 3, the determination means 4 determines whether there is a fine body motion, a coarse body motion, or a human body. . Then, the timer 5 measures the time during which the determination of the fine body motion has been continued for each part, outputs the measured time, and informs the part of the bedsore.

[0003]

However, in the sleeping apparatus of the above technology, when vibration or impact due to large body movement or disturbance is applied, the vibration propagates through the bedding, and the body is roughened at a part where no body movement actually occurs. Movement was detected.
In this case, it is erroneously determined that the continuation of the fine body motion (the state in which there is no large body motion) ends and the coarse body motion has occurred. In other words, there is a problem in that the notification of a bed sore part may cause a miss in detection of a part where there is a risk of bed sore and where no body movement occurs.

[0004] It is an object of the present invention to reduce the environmental factors even if the vibration caused by body movement or disturbance propagates through the bedding and the body movement detecting means detects a part where no body movement actually occurs. The detection means detects the change in the environment caused by the body movement at the same time, and determines that the body movement is only when the body movement is detected by both the detection means, so that a part where no body movement occurs is not erroneously detected. It is an object of the present invention to provide a sleeping apparatus capable of accurately determining a body motion and presenting more accurate information regarding a notification of a bed sores.

[0005]

In order to achieve the above object, the present invention has a plurality of body movement detecting means provided on a bedding, and a signal for converting an output of the body movement detecting means into a required body movement signal. Conversion means, storage means having a plurality of thresholds corresponding to the plurality of body movement detection means, and an output of the signal conversion means based on the threshold value obtained from the storage means is used for turning over or the like, such as rolling over, A determination means for determining whether there is a thin body movement due to a human body, or a human body; and a temperature and humidity near the bedding surface and the vicinity of the bedding disposed adjacent to the body movement detection means, airflow, heat flow and other environmental factors. Among them, a plurality of environment detecting means for detecting at least one environmental factor, a calculating means for calculating a change amount of a detection value of the environment detecting means, and comparing a calculated value by the calculating means with a preset value. If the calculated value is greater than or equal to the set value A comparison means for outputting a signal, an output means for outputting a signal if the result of the judgment by the judgment means is a rough movement and a signal is also output from the comparison means, and a time duration of the output of the output means. Then, the determination unit measures the duration of the time when the body movement is determined. When the output unit outputs a signal, the timer stops the measurement, and the time when the body movement is determined.
Comprising a clock means connection time to output a signal exceeds a certain measurement time.

[0006]

The present invention operates as follows by the above configuration.

[0007] Signals due to vibrations detected by a plurality of body movement detecting means provided on the bedding are converted into necessary body movement signals by signal conversion means. Based on the threshold value stored in the storage means in the determination means, it is determined whether or not the output of the signal conversion means is a coarse body movement due to turning over, a thin body movement due to heartbeat or breathing, or a human body. On the other hand, the signals detected by the plurality of environment detecting means for detecting at least one environmental factor among the environmental factors such as temperature, humidity, air flow, and heat flow rate of the surface of the bedding provided and the vicinity thereof are calculated by the calculating means. The amount of change is calculated. Then, the value calculated by the calculating means is compared with a preset set value, and if the calculated value is equal to or greater than the set value, a signal is output from the comparing means.
If the result of the determination by the determining means is a rough movement and a signal is also output from the comparing means, the signal is output from the output means in the sense that the body movement has actually occurred. The timing means measures the time during which the determination of the body movement by the determination means continues for each part, stops the signal if there is a signal output from the output means, and outputs a signal when the measured time exceeds a certain time.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram of the present embodiment, and FIG. 2 is a schematic diagram of the present embodiment. FIG. 3 is an output waveform diagram of the signal conversion means of this embodiment. FIG.
FIG. 4 is an explanatory diagram relating to measurement in the present embodiment and signal output of each unit.

In FIGS. 1 and 2, reference numerals 1a to 1z denote piezoelectric elements as body movement detecting means. 2 is a signal conversion means, 3
Is a storage means, 4 is a judgment means, 5 is a timing means, 6 is a relay switch, 7 is a filter, 8 is an amplifier, 9 is a rectifier, 10
Is an integrator, 11a to 11z are thermocouples as a plurality of environment detecting means for detecting temperature as an environmental factor, 12 is arithmetic means, 13 is comparing means, 14 is output means, and 15 is piezoelectric elements 1a to 1z and thermoelectric elements. Pairs 11a to 11z are beddings (mats) arranged adjacent to each other. Reference numeral 16 denotes a unit having a built-in signal processing means.

The operation of the above configuration will be described below. As shown in FIG. 2, on the mat 15, the piezoelectric elements 1a to 1z and the thermocouples 11a to
11z are arranged. The piezoelectric element is a thin film made of a polymer piezoelectric material such as polyvinylidene fluoride (PVDF), and a flexible electrode film is adhered to both sides. The piezoelectric element is formed into a tape shape. The piezoelectric element is deformed by vibrations caused by minute body movements of the body due to body movements, turning over, heart beats and breathing, and a voltage is generated by the piezoelectric effect, and a signal is output. This output signal is sequentially sent by the relay switch 6 in the signal conversion means 2, passed through the filter 7, amplified by the amplifier 8, rectified by the rectifier 9, and then integrated by the integrator 10. FIG. 3 shows an output signal of the signal conversion means 2 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, turning over, etc., and when the body is at rest and in a resting state, the level is low due to the heartbeat of the human body and fine movement due to breathing An output is obtained, and the output becomes zero when the user is out of bed. Utilizing this, the determination means 4 receives information as to which signal is inputted from the body movement detecting means 1a to 1z, and stores thresholds Va and Vb corresponding to each body movement detecting means. 3 and the output from the signal conversion means 2 is V
If it is within the range of a and Vb, it is determined that the movement is fine, and if it is greater than Vb, it is determined that the movement is coarse.

Hereinafter, description will be made with reference to FIG. The horizontal axis is time, A is a part where a human body is present and body movement is actually occurring, and B is a part where there is a human body but no body movement and it has been determined that the body movement has occurred due to the vibration transmitted through the bedding. is there. From the top, (1) output from the signal conversion means 2, (indicating Sokaradado, Hosotaido, determined without human) determination result by (2) determining means 4, (3) environment detecting means der
Output from thermocouples 11a - 11b, (4) comparison means 1
(3) output, (5) output from output means 14, (6)
The presence or absence of timing by the timing means 5 and (7) a waveform diagram of the output from the timing means 5 are shown. The signals detected by the body movement detecting means 1a to 1z are converted by the signal converting means 2 into an output waveform as shown in (1) in FIG. At t1 to t4, the determination means 4 determines the slender body movement, so that the time measurement means 5 of (6) performs the time measurement at both the A and B parts. t5
From t6 to t6, a body motion occurs at A, a lie body motion occurs at B, due to the propagation of vibration, and the determination of coarse body motion is made at both parts as shown in (2). However, the environment detection means der In A
The output from the thermocouples 11a and 11b changed (3), and the comparing means 13 output a signal as shown in (4) because the amount of change exceeded the set value. On the other hand,
In B, since no body movement has actually occurred, there is no change in (3), and no signal is output in (4). In A, since there is the determination of the coarse movement and the output of the signal from the comparing means 13, a signal is output from the output means 14 in the sense that the body movement actually occurred. In B, since there is no output from the comparing means 13, it is not regarded as an actual body movement, and no signal is output. As a result, the time measurement continued in (6) is stopped in A, but is continued in B. After t6,
In the same manner as in the above operation, when it is determined by the determination means 4 that the body movement is small in A and B, the time is measured by the time counting means 5. Will be reported as

[0012] by the action in this way, in an environment detection means
A certain thermocouple 11a to 11z detects a change in the environment that occurs in conjunction with the body movement, and when a body movement actually occurs, a signal is output from the output means 14 and the body is detected using only the body movement detection means 1a to 1z. Accurate body motion determination becomes possible as compared with performing motion determination. Therefore, the timing of the continuation time of the fine body movement by the time measuring means due to the erroneous body movement determination does not stop unnecessarily, so that there is an effect that a more accurate and accurate notification of a bed sore part can be made.

It is to be noted that, based on a signal notified from the bed apparatus as a bedsore, a bedsore prevention or treatment can be taken in combination with a bedclothes or device having the effects of bedsore prevention and treatment.

[0014]

As described above, according to the sleeping apparatus of the present invention, since the occurrence of body movement due to a change in environmental factors is detected by the environment detecting means, there is a large risk that the body movement detecting means alone may cause the body movement. Vibration caused by body movements such as turning over and disturbances propagates through the bedding, and it is possible to judge accurate body movement without erroneous determination that body movement has occurred in a part where there is no actual body movement, and it is possible to accurately report bedsores There is an effect that is.

[Brief description of the drawings]

FIG. 1 is a block diagram of a sleeping device according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a plurality of piezoelectric elements provided on a bedding of the apparatus and a comparison unit.

FIG. 3 is an output waveform diagram from a signal conversion unit of the apparatus.

FIG. 4 is an explanatory diagram relating to measurement and signal output of the device.

FIG. 5 is an explanatory view of a conventional bed apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Body motion detection means 2 Signal conversion means 3 Storage means 4 Judgment means 5 Clocking means 11 Thermocouple ( environment detection means ) 12 Calculation means 13 Comparison means 14 Output means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-15517 (JP, A) JP-A-4-272746 (JP, A) JP-A-4-272744 (JP, A) JP-A-4-272746 270843 (JP, A) JP-A-4-28352 (JP, A) JP-A-4-28351 (JP, A) JP-A-4-15038 (JP, A) JP-A-3-258246 (JP, A) JP-A-4-84938 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 5/11 A61B 5/00 101-102

Claims (1)

(57) [Claims] A plurality of body movement detecting means provided on the bedding; a signal converting means for converting an output of the body movement detecting means into a required body movement signal; and a plurality of body movement detecting means. Storage means having a plurality of corresponding threshold values, and based on the threshold value obtained from the storage means, determine whether or not the output of the signal conversion means is a coarse movement due to rolling over, a thin body movement due to heartbeat or breathing, or a human body. A plurality of environments for determining at least one environmental factor among environmental factors such as temperature, humidity, air flow, and heat flow rate which are disposed on the bedding and adjacent to the body movement detecting means and are adjacent to the body movement detecting means; Detecting means, calculating means for calculating the amount of change in the detection value of the environment detecting means, and comparing the calculated value by the calculating means with a preset set value, and if the calculated value is equal to or greater than the set value, a signal is output. Output by the comparing means and the determining means. Output means for outputting a signal if the result of the determination is coarse movement and a signal is also output from the comparison means, and measuring the duration of the time when the determination by the determination means is fine movement, from the output means. A sleeping device comprising: a time-measuring means for stopping time-measurement when there is an output, and outputting a signal when the duration of the fine body movement exceeds a certain time-measurement time.