TWI612942B - Apparatus and method for detecting and analyzing mobility on bed - Google Patents

Abstract

The invention relates to a device and a method for detecting and analyzing a subject's activity in a bed, the device comprising a plurality of force measuring devices respectively arranged on a bed, a processing unit for processing signals from the force measuring device, and a converting unit Receiving the signal transmitted by the processing unit and performing analog-to-digital conversion, an analysis unit calculates and integrates the signal transmitted by the conversion unit to obtain activity dynamic parameters such as turning distance, speed and force, and further evaluating the measured Activity on the bed, as a reference for care.

Description

Bed activity detection and analysis device and method

The invention relates to a bed activity detecting and analyzing device and method, in particular to detecting a subject's activity in bed and mechanically analyzing the measured data, which can be used as a nursing reference for reducing acne in bedridden patients. Incidence and anti-fall.

With the advancement of medical technology, the life span of human beings is gradually prolonged, and the society of the old age is the problem facing the future. The health problems caused by the elderly society, such as the disability caused by chronic diseases such as stroke and heart disease, make long-term bedridden patients There will be more and more, and long-term bedridden patients will have many complications, such as hemorrhoids, falls after getting out of bed, etc. These complications will use a lot of medical resources. For long-term bedridden patients, "beds" become their biggest living and activity interface. Therefore, a good interaction with the bed can minimize the complication caused by low activity.

The cause of hemorrhoids is that the bedridden person puts the body in the same position for a long time, so that the compression time of the subcutaneous tissue is too long, the blood circulation is poor, and finally the tissue hypoxia and necrosis occurs. In order to prevent the bedridden person from maintaining the same posture for a long time, the Republic of China Utility Model Patent No. M43319 proposes a distal posture monitoring mattress, which is mainly a bed frame and uses the data measured by sensing the foot of each bed. The comparison is to know the posture change, but it is still only detecting the change of the bedridden posture, and can not analyze the activity of the bedridden in the bed, and does not further analyze the measured force, and the detector of the system needs Used on this particular bed.

Therefore, it is necessary to provide a bed activity detecting and analyzing device and method, which can further convert the measured force into a plurality of various factors for the activity mechanics analysis, and can further understand the bed patient bed without comparing the database. The distribution of force and the effect of the frequency of movement on acne.

In view of the above problems, the main object of the present invention is to provide a device and method for active force on a mattress having detection and analysis functions without personal privacy and affecting comfort. Without the above problems, the present invention provides a device and method for simultaneously detecting and analyzing the activity on a mattress to analyze the force distribution on the bed, the distance and speed of the center of gravity movement, and the magnitude of the force of the center of gravity. The ability of bedriddens to turn over will further help reduce the incidence of acne in bedridden patients.

The invention provides a detecting and analyzing vitality device on a mattress, which is used for detecting and analyzing the activity mechanics on the mattress, and comprises a plurality of force measuring devices, a processing unit, a converting unit and an analyzing unit, and the measuring device is measuring The force is processed by a processing unit to amplify and filter the measured force, and the processed signal is output to a conversion unit, which converts the analog signal into a digital signal and calculates the center of gravity through an analysis unit. Move the situation to determine whether there is a rollover, and whether the subject has the behavior of getting out of bed. The so-called force-bearing behavior of detecting the human body refers to the use of a sensor to judge the movement behavior of the human body carried on the bed; for example, turning, getting up, leaving the bed, and other bed movements. A further activity mechanics analysis can be made by detecting that the bedridden performs these actions.

10‧‧‧ Bed activity detection and analysis device

100‧‧‧ dynamometer

110‧‧‧Processing unit

120‧‧‧Transfer unit

130‧‧‧Analysis unit

140‧‧‧ display

S200, 201, 202, 203, 204‧‧‧ steps

1 is a block diagram of a bed activity detecting and analyzing device according to an embodiment of the present invention.

2 is a flow chart of a method for detecting and analyzing bed activity in the embodiment of the present invention.

FIG. 3 is a diagram showing the relationship between force/position and time detected by the bed activity detecting and analyzing device according to the embodiment of the present invention, wherein (a) is a diagram showing the position of the center of gravity and the time when turning over; (b) The figure is the relationship between the force distribution and the time when turning over; (c) is the relationship between the force distribution and time when sitting up in Figure 3.

In the following, the structural features of the present invention and the intended effects thereof are described in the preferred embodiments, and are not intended to limit the scope of the invention as claimed.

1 is a block diagram of a bed activity detecting and analyzing device 10 according to an embodiment of the present invention. The bed activity detecting and analyzing device 10 includes a plurality of load cells 100, a processing unit 110, a converting unit 120, and an analyzing unit. 130 and display 140. The plurality of load cells 100 are disposed on a bed. In the embodiment, the force measuring devices 100 are a group of four, and are respectively detachably disposed under the four beds of the bed for measuring. The bed-bed (subject) applies the force applied to the bed on the bed and sends a force signal. The processing unit 110 processes the signal transmitted by the force measuring device, for example, the process of amplifying and filtering the signal, but is not limited thereto. The processed signal is still analogous at this time. The processing unit 110 sends the processed analog signal to the conversion unit 120, and the conversion unit 120 converts the analog signal sample into a digital signal and outputs the digital signal to the analysis unit 130. The analyzing unit 130 receives the signal output by the converting unit 120, and analyzes the values of the various parameters by using the built-in algorithm therein. For example, the center of gravity of the subject can be calculated based on the measured force and the position calculation. According to the present embodiment, the analysis unit 130 converts the calculated result into a graph output for display on the display 140. For example, the analysis unit 130 analyzes the force/center of gravity position for a predetermined period of time, and outputs a force versus time map and a center of gravity position versus time map. The analysis unit 130 further provides activity force parameters such as rollover distance, time, speed, and can evaluate the subject's ability to turn over based on the parameters.

2 is a flow chart of a method for detecting and analyzing bed activity in accordance with an embodiment of the present invention. Hereinafter, a method for detecting the activity of the bed force according to the embodiment of the present invention will be described with reference to FIG. 2, and reference is also made to FIG. In step S200, the force applied to the bed by the subject in bed is measured by the plurality of force measuring devices 100 first. The force measuring devices 100 are defined as different coordinate positions, for example, the coordinates of the first load cell are (x0, y0), the coordinates of the second force measuring device are (x1, y0), and the third force measuring device The coordinates are (x0, y1) and the coordinates of the fourth load cell are (x1, y1). The load cells 100 at the different coordinate positions output the measured force signals to the processing unit 110. The position of the center of gravity can then be calculated from the coordinates of each of the force measuring devices 100 and the force measured by each of the force measuring devices 100.

In step S201, the processing unit 110 transmits the process of amplifying and filtering the force signal to the conversion unit 120, and in the step S202, the signal is converted into analog-to-digital conversion via the conversion unit, and converted. The digital signal is transmitted to the analysis unit 130 Analysis.

In step S203, the analyzing unit 130 measures the force signal and the position (ie, coordinates (x0, y0), (x1, y0), according to each of the force measuring devices 100 by the following formulas (a) and (b). (x0, y1), (x1, y1)) can calculate the position of center of pressure (CoP): CoPx = f (x, y, F1, F2, F3, F4, t) (a)

CoPy=g(x,y,F1,F2,F3,F4,t) (b) In the above formula, x and y are in the coordinate position of each load cell 100 in this embodiment, and F1, F2, F3, and F4 are respectively The force values measured by the first to fourth load cells 10, CoPx, and CoPy are the coordinates of the position of center of pressure (CoP). The analysis unit also provides a graphical user interface for display on the display for operation.

In another embodiment of the present invention, in formulas (a) and (b), x, y may be a, b, representing the size parameters of the bed, for example, representing the length and width of the bed, respectively.

In S204, the calculated position of the center of gravity and the force are collected by the analyzing unit to collect the position and force of the center of gravity for a period of time, respectively outputted with the time relationship diagram and displayed on the display, thereby obtaining the turning distance and speed. The mechanical parameters of the activity such as the number of times are further analyzed. In addition, the analysis unit 130 can be configured to issue a warning signal if the subject is lying on the bed for a certain period of time without moving, or if the data indicates that the child has left the bed.

In view of the above, please refer to FIG. 3, which is a diagram showing the force/center of gravity position and time detected by the bed activity detecting and analyzing device 10 according to an embodiment of the present invention, wherein (a) is a center of gravity A map of location versus time. When the subject performs the turning action, the position of the center of gravity changes accordingly. When the next turning action is completed, the position of the center of gravity returns to the level. When the waveform changes (a), it is raised or decreased, which is a turn over. The action can be calculated from (a) the figure in which the number of rises or falls of the pattern change is the number of rollovers, and the slope of the rising and falling edges of the waveform can be used to know the speed of the rollover, wherein the waveform change time with the slope is the rollover time. When the subject performs a turning motion, the force on the bed changes. (b) The graph shows the force distribution changing with time. The waveform change can be found in comparison with (a) the waveform change (b). The change in the force produced by the turning of the figure, and it can be known that the moment of turning over will produce the greatest force. If the posture of turning over is greater, the relative force will be greater. From (b) the figure shows the change of the force in each group of the waveform change (that is, the change of the force generated by one turning action), and the maximum peak value is the turning force at the moment of each action. (c) The picture shows the distribution of forces generated when sitting up is time dependent As shown in Fig., it can be seen that the change in the peak value in (c) is more obvious than that in (b). Therefore, the bed posture change can be analyzed according to the force distribution and time relationship diagram.

Table 1 shows the actual actual data obtained by experimental testing of 5 subjects using a device according to an embodiment of the present invention. From the position of the center of gravity and the analysis of the force signal, the turning time, the turning distance of the center of gravity, the turning speed, the time of the center of gravity, the maximum force of turning over, the maximum force of the turning over, the weight of the turning body, the weight of the body, and the weight of the turning body are known. Wait. For example, in terms of gender, the statistics reveal the turning distance of the center of gravity, the turning speed, the turning time, the turning distance of the reply center, the reply speed, the turning time, the turning time, the turning force, and the turning over force. There are significant differences between men and women in terms of turning over force, weight, weight, and weight. In this way, it can be inferred that the boys turn over the distance, the strength is greater than the girls and the speed of turning over is also faster, but the weight of the girls after the weight correction is rather large.

Statistical results indicate significant differences: * p <.05; ** p < .001

In summary, the present invention provides a device and method for simultaneously detecting and analyzing the activity of a bed to analyze the force distribution on the bed, the distance and speed of the center of gravity movement, and the magnitude of the force to understand the ability of the bedridden to turn over. Further, it can be used as a reference for nursing care to reduce the incidence of acne and prevent falls in bedridden patients.

Although the present invention has been described above with reference to the preferred embodiments, the preferred embodiments of the present invention are not intended to limit the present invention, and any one skilled in the art can make it without departing from the spirit and scope of the present invention. All kinds of changes and retouchings, the changes and refinements made by them are within the scope of this creation. The scope of protection of this creation is subject to the definition of the patent application scope attached.

10‧‧‧ Bed activity detection and analysis device

100‧‧‧ dynamometer

110‧‧‧Processing unit

120‧‧‧Transfer unit

130‧‧‧Analysis unit

140‧‧‧ display

Claims (26)

A bed activity detecting and analyzing device, in particular for judging a subject's ability to turn over, the bed activity detecting and analyzing device comprises: a plurality of force measuring devices arranged on a bed for measuring a subject to be applied to The force of the bed and the sending of the force signal; and an analyzing unit for calculating the force signal of the force measuring device to obtain a turning force time or a replying force time to represent the subject's turning ability, wherein The analyzing unit collects the force signal for a period of time, and outputs a relationship diagram between the force and the time. In the relationship between the force and the time, the largest waveform change in each waveform change group is the maximum instantaneous force of the action, and the turning effect The force time is the time elapsed when the waveform starts to change to the maximum instantaneous force of the action, and the reply force time is the time that the waveform begins to change to the maximum instantaneous force of the action when the grading is lying. For example, the bed activity detecting and analyzing device of the first application patent scope includes a processing unit for amplifying and filtering the force signal outputted by the force measuring device. For example, the bed activity detecting and analyzing device of the second application of the patent scope further includes a converting unit that receives the force signal processed by the processing unit and converts it into a digital signal. For example, in the scope of claim 1, the bed activity detecting and analyzing device, wherein each of the force measuring devices defines a target position. For example, in claim 4, the bed activity detecting and analyzing device, wherein the analyzing unit calculates the position of the center of gravity by using the coordinate position of the force measuring device and the force signal. For example, in the scope of claim 5, the bed activity detecting and analyzing device, wherein the analyzing unit collects the position of the center of gravity for a period of time, and outputs a map of the position of the center of gravity and the time. For example, in the scope of claim 6, the bed activity detecting and analyzing device, wherein each waveform change of the position of the center of gravity and the time map represents an action. For example, in the scope of claim 6, the bed activity detecting and analyzing device, wherein the slope of the rising and falling of the waveform of the position of the center of gravity and the time of the graph represents the turning speed. For example, in the scope of claim 6, the bed activity detecting and analyzing device, wherein the position of the center of gravity and the time map have a slope change time is the turning time. For example, in the patent scope of claim 1, the bed activity detecting and analyzing device, wherein the analyzing unit calculates the position of the center of gravity according to the length and width dimensions of the bed and the force signal. For example, in claim 10, the bed activity detecting and analyzing device, wherein the analyzing unit collects the position of the center of gravity for a period of time, and outputs the position of the center of gravity into a relationship with time. For example, in the claim 11, the bed activity detecting and analyzing device, wherein each waveform change of the position of the center of gravity and the time map represents an action. For example, in the application for patent scope, the bed activity detecting and analyzing device, wherein the slope of the rising and falling of the waveform change of the position of the center of gravity and the time represents the turning speed. For example, in the application for patent scope, the bed activity detecting and analyzing device is heavy. The heart position versus time graph has a slope with a waveform change time of the rollover time. For example, in the scope of claim 1, the bed activity detecting and analyzing device, wherein the force measuring devices are respectively disposed under the bed of the bed when in use. The utility model relates to a method for detecting and detecting the activity of a bed, in particular for determining the ability of the subject to turn over. The method for detecting and detecting the activity of the bed comprises the following steps: setting a plurality of force measuring devices on a bed, and measuring the force measuring devices by using the force measuring devices The subject applies the force applied to the bed and sends a force signal; and calculates the force signal of the force measuring device to obtain a turning force time or a reply force time to represent the subject's turning ability The analysis unit collects the force signal for a period of time, and outputs a relationship diagram between the force and the time. In the relationship between the force and the time, the largest waveform change in each waveform change group is the maximum instantaneous force of the action. The turning-over force time is the time that the waveform begins to change to the maximum instantaneous force of the action when the body is turned over, and the replying force time is the time that the waveform begins to change to the maximum instantaneous force of the action when the grading is lying. For example, the method for analyzing the activity of the bed in the 16th item of the patent application further includes defining the coordinate positions of the respective force measuring devices. For example, the method for analyzing the activity of the bed on the 17th item of the patent application further includes calculating the position of the center of gravity by using the coordinate position of each force measuring device and the force signal. For example, in the application for patent scope range 18 bed activity detection analysis method, further includes collecting the position of the center of gravity for a period of time, and outputting the relationship between the position of the center of gravity and the time. For example, in claim 19, the bed activity detection and analysis method, wherein each waveform change of the position of the center of gravity and the time map represents an action. For example, in claim 19, the bed activity detecting and analyzing method, wherein the slope of the waveform change of the position of the center of gravity and the time map represents the turning speed. For example, the method for detecting the activity of the bed on the 16th item of the patent application further includes calculating the center of gravity according to the length and width dimensions of the bed and the force signal. Set. For example, in the patent application scope 22, the activity detection detection method of the bed, wherein the analysis unit further collects the position of the center of gravity of a period of time, and outputs a map of the position of the center of gravity and the time. For example, in the scope of claim 23, the activity detection detection method of the bed, wherein each waveform of the position of the center of gravity and the time diagram represents one action at a time. For example, in the 23rd item of the patent application, the method for detecting and detecting the activity of the bed, wherein the slope of the rising and falling of the waveform of the position of the center of gravity and the time of the graph represents the turning speed. For example, in the scope of claim 25, the method for analyzing the activity of the bed, wherein the position of the center of gravity and the time map have a slope change time is the turning time.