CN110652298A

CN110652298A - Nursing bed capable of monitoring sleeping behaviors and states of old people and monitoring method

Info

Publication number: CN110652298A
Application number: CN201911045027.1A
Authority: CN
Inventors: 任林燕; 陈玉霞; 郭勇; 骆攀攀; 殷媛媛; 张锦龙; 翁蓓蓓; 石允娇; 石兰兰
Original assignee: Anhui Agricultural University AHAU
Current assignee: Anhui Agricultural University AHAU
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-01-07
Anticipated expiration: 2039-10-30
Also published as: CN110652298B

Abstract

The invention discloses a nursing bed capable of monitoring sleeping behaviors and states of old people and a monitoring method, wherein a bed screen is fixed at one end of a bed underframe, and a skeleton frame and a mattress are sequentially installed on the bed underframe in a matched manner from bottom to top; the surface of the mattress is provided with a luminous fabric, and a plurality of linear induction synchronizers are uniformly arranged in the mattress in a left-right partition mode to form a linear induction synchronizer matrix; the linear induction synchronizer matrix collects electromotive force variable quantities under the use states of the left side and the right side, the continuously collected electromotive force variable quantities are transmitted to the host processor through the information collector, the host processor counts the electromotive force variable quantities through calculation to obtain human-bed interface depression quantity matrix information, the human-bed interface depression quantity matrix information is analyzed to monitor sleeping behaviors, breathing conditions and bed leaving time, the monitoring information is sent to the mobile phone, and an alarm is given through the host processor when abnormal information is monitored; the surface luminous fabric of the mattress is controlled to shine or darken when the old people get up or sleep at night.

Description

Nursing bed capable of monitoring sleeping behaviors and states of old people and monitoring method

Technical Field

The invention relates to the technical field of living beds, in particular to a nursing bed capable of monitoring sleeping behaviors and states of old people and a monitoring method.

Background

The world health organization emphasizes that sleep is the third most important factor affecting human health beyond diet and exercise. 2017, Chinese sleep quality analysis reports indicate that sleep health problems are gradually increased along with the increase of ages, wherein about 70% of old people over 60 have sleep quality problems such as insufficient deep sleep, short sleep time and the like. The low sleep quality is an important reason for diseases such as hypertension, heart disease, hyperglycemia, Alzheimer's disease and the like of the old. With the increasingly serious aging of China and the increase of the sleep health problems of the old people, the sleep monitoring problem of the old people becomes a problem to be solved urgently in the industrial economy and society.

The bed system is often considered to be an important external factor affecting the quality of sleep, during which the bed system is in constant contact with the body, supporting it, relaxing the muscles of the body and recovering the intervertebral discs. When the old people sleep on the bed system, various sleep behaviors and posture adjustments such as turning over can exist so as to avoid the situation that local muscles and soft tissues are continuously pressed to influence blood circulation, and on the other hand, the sleep behaviors and the posture adjustments in the sleep process cannot be too frequent, otherwise, the sleep quality can be influenced, and the problems of sleep disorders such as restless leg syndrome, periodic limb actions and the like are mostly expressed as the increase of action behaviors in the sleep process, so that the sleep is intermittent and difficult to maintain. Meanwhile, the old also has a series of actions of getting out of bed, such as thirst, getting up at night, and the like during the night sleep. Medical data shows that 60% to 70% of the elderly have a habit of getting up at night, and some elderly need to get up at night two to three times a day in the evening. The old people have too many times of getting up at night, and the brain is not clear when getting up at night, so the old people are easy to fall down, in particular to the old people with Alzheimer's disease. The unreasonable design of the night lamp is one of the main objective factors causing the old to fall down, such as the lamp switch needs to be found out in dark, the lamp light is too dark and cannot be clearly illuminated, and the like. On the other hand, researches show that the light adaptation time of people needs about 1 minute, and the visual nerve of the old people is stimulated when the light of the night lamp is too bright or the light of the night lamp is too fast, so that the old people have difficulty in falling asleep for the second time. Meanwhile, the World Health Organization (WHO) statistics show that 65 years old people die, 70% of which are related to falls, which have become the first killers of disability, disability and death in the elderly population. Of these, over 51% of the elderly fall at night due to the night and subsequent disability or death. The untimely rescue after the old falls down after getting up at night is the main reason for death of the old. In addition, the night frequency, the breathing condition and the like are also one of the important bases for reflecting the health problems of the old. Therefore, the sleep behavior, the bed leaving time, the breathing condition and the like of the old people are accurately recorded, so that nursing staff or guardians can be reminded in time when accidents happen, and the basis indexes are provided for the sleep health report of the old people, so that the method has important significance for the health safety of the old people.

At present, the sleeping behavior test methods mainly include a polysomnography method, a body movement record chart analysis method and a camera shooting method. The polysomnography can only be completed in a laboratory, a multi-conductive electrode needs to be placed on a human body, and the physical activity recording graph analysis method needs to wear physical activity recording devices at multiple positions of limb parts of the human body, and can affect the sleep to a certain degree. Although the camera shooting method can test the sleeping posture and the sleeping action behavior on the premise of not disturbing the sleep, the method does not respect the privacy of the testee and can not accurately test the subtle action behavior and the action behavior covered by bedding. The existing medical bed for monitoring the sleep of the old in the market is mainly a medical bed, and the medical bed only monitors physiological parameters of the old, such as respiration, heart rate and the like, and cannot comprehensively reflect the sleep behaviors and states of the old. And, when monitoring the breathing of old person, rhythm of the heart etc. mainly through wearing bracelet, many conductive electrode or upper and middle part in the mattress, the heart position sets up a breathing, rhythm of the heart and detects the area, can cause the influence of certain degree to normal sleep.

Disclosure of Invention

The invention aims to provide a nursing bed capable of monitoring sleep behaviors and states of an old person and a monitoring method.

The invention adopts the following technical scheme to solve the technical problems:

a nursing bed capable of monitoring sleep behaviors and states of old people comprises a bed screen, a bed bottom frame, a skeleton frame, a mattress, a plurality of linear induction synchronizers, an information collector, a host processor and a mobile phone;

the bed screen is fixed at one end of the bed underframe, and the bed underframe is sequentially provided with the skeleton frame and the mattress in a matching way from bottom to top; the surface of the mattress is provided with a luminous fabric, and the linear induction synchronizers are uniformly arranged in the mattress in a left-right partition mode to form a linear induction synchronizer matrix; the linear induction synchronizer matrix collects electromotive force variable quantities under the use states of the left side and the right side, continuously collected electromotive force variable quantities are transmitted to the host processor through the information collector, the host processor counts the electromotive force variable quantities through calculation to obtain human-bed interface indentation quantity matrix information, the human-bed interface indentation quantity matrix information is analyzed to monitor sleeping behaviors, breathing conditions and bed leaving time, monitoring information is sent to the mobile phone, and when abnormal information is monitored, an alarm is given through the host processor; the surface luminous fabric of the mattress is controlled to shine or darken when the old people get up or sleep at night.

As one preferable mode of the invention, the bed screen comprises a screen frame and a soft bag fixed on the screen frame; the soft bag comprises fiber cotton, sponge, latex filling materials and a knitted fabric wrapping the filling materials, and is divided into a head support and a back support from top to bottom.

As one of the preferable modes of the invention, the bed underframe comprises a bed tail plate, two bed side plates, a bed bottom plate, four corner connectors and a plurality of metal sheets; the bed tail plate, the two bed side plates and the bed bottom plate are fixed through four corner connectors, and the corner connectors and each metal block are installed at the same height and used for supporting the skeleton frame.

As one of the preferable modes of the invention, the bed also comprises foldable guardrails which are arranged at two sides of the bed underframe; and the foldable guardrail is provided with an adjusting button.

As one of the preferable modes of the invention, the skeleton frame comprises a steel frame and a plurality of bamboo skeleton strips arranged in the steel frame, each bamboo skeleton strip comprises two or three layers of bamboo elastic sheets, two metal sleeve heads sleeved at two ends of the two or three layers of bamboo elastic sheets and a hardness adjusting device connected to the bottoms of the two metal sleeve heads, and the hardness adjusting device is used for adjusting the pressure when the surfaces of the two or three layers of bamboo elastic sheets are stressed.

As one of the preferable modes of the invention, the hardness adjusting device comprises a supporting base, a movable sliding block, a metal supporting block, an elastic metal round bar and a supporting rod; the bottoms of the two metal sleeve heads are respectively connected with two supporting rods, and each two supporting rods are clamped at two sides of one end of the supporting base and are fixed with the supporting base; the middle part of the supporting base is fixedly sleeved with two metal supporting blocks, one end of the outer side of the two metal supporting blocks, opposite to the supporting base, is respectively sleeved with two movable sliding blocks in a sliding mode, the elastic metal round rods are four round rods which are tightly attached to the two sides of the supporting base respectively and sequentially penetrate through the through holes of the metal supporting blocks and the through holes of the movable sliding blocks to be fixedly connected with the through holes of the bottoms of the supporting rods on the corresponding sides, the supporting rods are fixedly connected with the through holes of the metal supporting blocks, and the supporting rods are connected with the through holes of the movable sliding.

In a preferred embodiment of the present invention, the support base has a scale mark in a sliding range of the movable slider; the movable sliding block is provided with a bolt, the movable sliding block moves left and right on the supporting base through loosening the bolt, and the movable sliding block is fixed on the supporting base through tightening the bolt, so that the hardness adjustment of the nursing bed is completed; the upper end of the metal sleeve head is provided with two holes with grooves in parallel for directly fixing three layers of bamboo elastic sheets, or bayonets for placing the bamboo inserting sheets are arranged in the grooves of the holes for fixing two layers of bamboo elastic sheets; the steel frame includes outer frame and connects in the vertical braces of outer frame middle part, a plurality of bamboo raft ribs pass through the vertical braces divides into double and align to grid in outer frame, vertical braces and outer frame all are equipped with the jack that is used for connecting the bamboo raft ribs on the corresponding terminal surface of connecting the bamboo raft ribs, bamboo raft ribs both ends are equipped with the tenon with jack matched with.

In a preferred embodiment of the present invention, the rib cage is divided into 7 regions of the head, the shoulder and back, the waist, the hip, the thigh, the calf, and the foot in the longitudinal direction.

In a preferred mode of the invention, the mattress comprises a bedding layer, a core layer and a fabric composite layer covering the bedding layer and the core layer; the fabric composite layer comprises an outer fabric, hard sponge or sponge material and an inner fabric; the outer fabric is a luminous fabric which slowly brightens and darkens, and the host processor controls the luminous fabric to shine or darken; the inner fabric is a knitted fabric; the hard sponge or sponge material is filled between the outer fabric layer and the inner fabric, and the inner fabric layer and the outer fabric layer are directly and fixedly connected through quilting; the bedding layer is divided into an upper bedding layer and a lower bedding layer, the upper bedding layer and the lower bedding layer are respectively filled with memory cotton, latex sponge and polyurethane sponge filling materials from top to bottom, and the thickness of the upper bedding layer is larger than that of the lower bedding layer; the core layer is a foam sponge block or a latex sponge block which coats a plurality of rows of high-low spring bags; each high-low spring bag is made of non-woven fabrics wrapping the high-low spring, the high-low spring specifically comprises a large spring which is vertically arranged and two small springs which are respectively fixed at the upper end and the lower end of the large spring, and a gap is formed between the two small springs; and a linear induction synchronizer matrix is fixed in the fabric composite layer.

The invention also discloses a method for monitoring the sleep behavior and the state of the old by adopting the nursing bed, which comprises the following steps:

s1, continuously collecting electromotive force variation under the use states of the left side and the right side by the linear induction synchronizer matrix, and transmitting the electromotive force variation to the host processor through the information collector;

s2, processing the electromotive force variable quantity by the host processor, wherein the host processor calculates and analyzes the indentation displacement quantity of each region of the mattress, the indentation area of each region, the ratio of the indentation displacement quantity and the ratio of the indentation area to determine the sleeping behavior;

s3, the host processor determines the breathing condition by calculating and analyzing the sum of derivatives of electromotive force output by the linear induction synchronizer matrix on the mattress to relative time;

s4, the host computer processor determines the out-of-bed condition by calculating and analyzing the total depression displacement and the total depression area of the human-bed interface.

In a preferred embodiment of the present invention, the host processor converts the electromotive force variation of the linear synchronous inductor into a displacement by the following formula:

the function of displacement D (x)_i,x_j) Comprises the following steps:

wherein E is electromotive force; k is an electromagnetic coupling coefficient; x is a displacement amount; w is the winding pitch; um and w are the amplitude and frequency of the excitation voltage; d (x)_i,x_j) Is located on the mattress (i, j)) Displacement of the linear synchronous sensor at the position; e (x)_i,x_j) Is the output electromotive force of a linear synchronous inductor (6) positioned at the position of a mattress (i, j);

and the host processor combines the calculated displacement of the plurality of linear synchronous sensors into a human-bed interface depression displacement matrix and stores the matrix, and the host processor processes the human-bed interface depression displacement matrix to obtain sleep behavior, breathing condition and bed leaving condition.

As one of the preferred modes of the present invention, the step of the host processor determining the sleep behavior comprises:

(a) the information collector collects the electromotive force variable quantity of the linear synchronous inductor below the pillow and transmits the electromotive force variable quantity to the host processor, and the host processor calculates and obtains the depression displacement A generated by the pillow on the mattress;

(b) calculating the indentation displacement, the indentation area, the indentation displacement ratio and the indentation area ratio of each region of the mattress by using a host processor, wherein the indentation displacement of each region of the mattress is the indentation displacement D of the crus_LLaterally asymmetric indentation displacement D_cAnd absolute value | D of lateral asymmetric indentation displacement_cL, the laterally asymmetric indentation displacement D_cThe total amount of the indentation displacement on two sides of a symmetrical central curve formed after the shoulder, the waist and the hip are indented, and the indentation area of each area of the mattress is the total indentation area S_tLaterally asymmetric crush area S_cAnd absolute value | S of laterally asymmetric indentation area_cThe ratio of the indentation displacement is the ratio R of the head-hip indentation displacement_hhThe head-hip depression displacement ratio R_hhThe ratio of total depression displacement of the head area except the pillow to total depression displacement of the hip area, and the ratio of depression area is the ratio R of upper trunk depression area to hip depression area_thThe ratio R of the upper trunk area to the hip area_thThe ratio of the sum of the press-fit areas of the shoulder and back parts and the waist part to the press-fit area of the leg part;

displacement D of the leg indentation_LThe calculation formula of (2) is as follows:

the lateral asymmetric indentation displacement D_cThe calculation formula of (2) is as follows:

absolute value | D of the lateral asymmetric indentation displacement_cThe formula for | is:

the indentation area is obtained by calculating indentation displacement D (x) of each region_i,x_j) The sum of the points greater than zero, and then judging the area size of the area generating the displacement:

when D (x)_i,x_j)>0, S (x)_i,x_j)＝K

When D (x)_i,x_j) When equal to 0, S (x)_i,x_j)＝0

The total pressure sink area S_tThe calculation formula of (2) is as follows:

the lateral asymmetric indentation area S_cThe calculation formula of (2) is as follows:

absolute value | S of the lateral asymmetric indentation area_cThe formula for | is:

the head-hip depression displacement ratio R_hhThe calculation formula of (2) is as follows:

the ratio R of the upper trunk area to the hip area_thThe calculation formula of (2) is as follows:

wherein d is_legIs a matrix of displacement of depression of the lower leg, d_headIs a head indentation displacement matrix, d_hipThe matrix is a hip indentation displacement matrix, K is an indentation area coefficient, m is a transverse indentation amount test point number, n is a longitudinal indentation amount test point number, n1, n2, n3 and n4 are longitudinal indentation amount test point numbers of head, upper trunk, hip and lower leg regions respectively, l is a longitudinal total indentation amount test point number of shoulder, waist and hip, and m, n1, n2, n3, n4 and l take natural numbers;

(c) the amount D of the depression displacement of the lower leg is measured by a Z-score data standardization method_LLaterally asymmetric indentation displacement D_cAbsolute value | D of lateral asymmetric indentation displacement_cTotal pressure sink area S_tLaterally asymmetric crush area S_cAbsolute value of lateral asymmetric indentation area | S_cDisplacement ratio R of head and hip depression_hhAnd the ratio R of the upper trunk area to the hip area_thEight indexes are normalized to form feature vectors for identifying five sleeping postures of supine, left side lying, right side lying, standing up and back sitting, and the host processor utilizes the vector machine classifier to process the feature vectors obtained by calculation to identify the sleeping postures;

(c1) by absolute value | D of displacement for lateral asymmetric indentation_cAbsolute value of | and lateral asymmetric crush area | S_cI, judging when D_cI and I S_cIf the |, judging the user to lie on side, entering the step (c2), otherwise, entering the step (c3) if the user is in a supine or sitting posture;

(c2) judging whether the left side lies or the right side lies by the positive or negative of the lateral asymmetric indentation displacement Dc and the lateral asymmetric indentation area Sc;

(c3) judging the total pressure subsidence area St, judging the supine position when St is large, if the supine position is the situation, finishing the recognition, otherwise, entering the step (c 4);

(c4) when the head and hip indentation displacement is smaller than Rhh, the crus indentation quantity DL is large, and the ratio Rth of the upper trunk indentation area to the hip indentation area is small, the sitting up is judged, and if the head and hip indentation displacement is larger than Rhh, the crus indentation quantity DL is close to zero, and the ratio Rth of the upper trunk indentation area to the hip indentation area is large, the sitting up is judged as the backrest sitting;

(d) after the host processor identifies the sleeping postures, the host processor judges and records the sleeping posture keeping time, the sleeping posture time distribution, the sleeping behavior generation time, the turnover times and the times of the occurrence of the immobile segments exceeding the preset time, and determines the sleeping behavior.

As one of the preferred modes of the present invention, the step of determining the breathing condition by the host processor further comprises:

(e) the host processor calculates the sum of derivatives of electromotive force output by the linear synchronous sensor on the mattress with respect to relative time, wherein the peak value of each pulse wave of f (t) is the signal of the upper trunk breathing mode and the sleeping action behavior;

wherein, E (x)_i,x_j) Is the output electromotive force of a logarithmic potentiometer located at the position of the mattress (i, j);

(f) the host processor draws a waveform diagram of the breathing mode of the upper trunk part and the signals of the sleep behaviors relative to time, correspondingly marks the generation time of the sleep behaviors on the waveform diagram, and takes the waveforms corresponding to the time without the sleep behaviors as the signals of the breathing mode of the upper trunk part;

(g) the host processor analyzes the waveform of the upper trunk breathing mode signal, marks an apnea event, records and utilizes the duration of a single breathing cycle, the total number of apneas and the duration thereof, an apnea index, an apnea rate and a time node index of the occurrence of the apneas to determine the breathing condition, wherein the apnea index is the ratio of the total time of the apneas to the total number of the apneas, and the apnea rate is the ratio of the total time of the apneas to the total sleep time.

As one of the preferred modes of the present invention, the step of the host processor determining the out-of-bed condition further comprises:

(h) the host processor calculates the total pressure sink displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is zero, determining to leave the bed;

the host processor calculates the total pressure sink displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is more than zero, determining to return to the bed;

(i) the host processor records the bed leaving time, records and determines the bed leaving condition by using the total bed leaving times, the total bed leaving time, the single bed leaving time, the bed leaving index, the bed leaving rate and the time node index of the occurrence of the bed leaving behavior, wherein the bed leaving index refers to the ratio of the total bed leaving time to the total bed leaving times, and the bed leaving rate refers to the ratio of the total bed leaving time to the total sleep time, and when the host processor judges that the bed leaving time is overtime, the host processor can automatically give an alarm.

Compared with the prior art, the invention has the advantages that: (1) the invention overcomes the limitation that the prior sleep behavior identification and evaluation technology needs to wear a testing device on a human body or does not sufficiently respect the privacy of a subject, utilizes the human-bed interface indentation displacement to identify the sleep behavior, not only can ensure the privacy of the subject, but also can realize the non-interference identification and real-time monitoring of the sleep behavior. (2) The invention overcomes the limitation that the prior respiratory condition monitoring needs to wear a bracelet, a multi-conductive electrode or a respiration and heart rate detection belt arranged at the middle upper part of a mattress and around the heart position, can affect normal sleep, extracts respiration variation waves by using the change of the human-bed interface indentation amount, realizes interference-free respiratory condition monitoring, records and analyzes the apnea condition, and judges whether the senile Sleep Apnea Syndrome (SAS) symptom exists. (3) The adjustable mattress frame realizes the design of adjustable softness of the old people nursing bed subareas and each area, and can realize the adjustment of the softness of the mattress frame by adopting the mattress frame with adjustable softness, utilizing the difference of the density, the elastic modulus, the carbonization degree and the layer number of the bamboo spring pieces and combining the design of adjustable elasticity size of the resin round bars of the mattress frame, thereby adjusting the softness of different areas and meeting the requirements of people with different body types. (4) The mattress adopts the high-low springs, the large springs and the small springs are combined, the indentation displacement is small at the positions with small stress, the large springs are independently supported, the pressure can be effectively relieved, and the indentation displacement is large at the positions with large stress, and the large springs and the small springs are jointly supported, so that the elasticity and the stability of the mattress can be ensured. The different supports in different regions of bed can be realized to the subregion design that combines the skeleton of arranging, makes old person's backbone be in the natural bending state in the sleep process, and it is healthy to effectively protect old person's backbone, realizes that pressure alleviates. (5) The invention provides a novel bed leaving time monitoring method, which records the bed leaving time of a user by utilizing the change (whether the change is zero) of the indentation displacement of a human-bed interface, carries out the personalized design of the bed leaving time alarm according to the specific conditions of the user and effectively avoids the condition that old people cannot timely rescue and cause disability or death after falling over at night. (6) The invention provides a night automatic lighting method, which utilizes the indentation displacement and the indentation area change condition of a human-bed interface, automatically judges the getting-off and getting-back behaviors of the old through recognizing the rising posture of the old, controls the on-off of a bed lamp, and effectively avoids the collision phenomenon caused by turning on and off the lamp when the old is dark. (7) The invention overcomes the limitation that the prior sleep monitoring can only record the physiological parameters of the middle-aged and the elderly in the sleeping process, can not evaluate the sleeping quality of the middle-aged and the elderly, and can not assist in improving the sleeping, and provides an auxiliary treatment suggestion for healthy sleeping by analyzing the sleeping behavior, the breathing condition and the bed leaving time and combining the human engineering theory and the healthy sleeping research.

Drawings

Fig. 1 is an external view schematically showing a nursing bed of the present embodiment;

FIG. 2 is a schematic view showing a foldable usage state of the guard rail of the nursing bed of the present embodiment;

FIG. 3 is a schematic view of the whole bed frame of the bed screen of the nursing bed of the present embodiment;

FIG. 4 is a schematic view of the skeleton frame of the nursing bed of the present embodiment;

FIG. 5 is a schematic view of a skeleton row of the nursing bed of the present embodiment;

FIG. 6 is a schematic view of a split frame of the nursing bed of the present embodiment;

FIG. 7 is a schematic view of the bamboo rib strip (with 3 bamboo splints) according to the embodiment;

FIG. 8 is a schematic view of the bamboo rib strip (with 2 bamboo splints) according to the embodiment;

FIG. 9 is a schematic view of the metal sleeve and the bamboo insert of the present embodiment;

FIG. 10 is a schematic sectional view of the metal sleeve head and the bamboo inserting sheet according to the present embodiment;

FIG. 11 is an assembly view of the bamboo rib strip (with 3 bamboo splints) of the present embodiment;

FIG. 12 is an assembly view of the bamboo rib strip (with 2 bamboo splints) of the present embodiment;

FIG. 13 is a schematic view of the bamboo rib (with 3 bamboo splints) of the present embodiment in a stressed state after moving the sliding block;

FIG. 14 is an overall view of the bamboo rib strip (with 2 layers of bamboo splints) of the present embodiment in a stressed state after moving the sliding block;

FIG. 15 is an overall schematic view of a mattress of the nursing bed of the present embodiment;

FIG. 16 is a longitudinal sectional view of a mattress of the nursing bed of the present embodiment;

FIG. 17 is a horizontal section view 1 of the nursing bed of the present embodiment, i.e., a horizontal distribution diagram of the linear induction synchronizer matrix;

FIG. 18 is a horizontal section view 2 of the nursing bed of the present embodiment, i.e., the horizontal distribution of the high and low spring packs;

FIG. 19 is a sectional view of the high and low spring package of the present embodiment;

FIG. 20 is a schematic view of the assembly of the high-low spring pack and the foam sponge (or latex sponge) body of the present embodiment;

FIG. 21 is a schematic view showing the entire assembly of the nursing bed of the present embodiment;

FIG. 22 is a general sectional view of a sleeper lying on its side on an experimental bed with acquisition of the human-bed interface indentation displacement;

fig. 23a1, 23a2 and 23a3 are diagrams of the present embodiment showing the compression displacement of the human-bed interface in the lying state;

FIG. 23b1, FIG. 23b2, FIG. 23b3 are diagrams of the collected collapse displacement of the human-bed interface in the supine position of the present embodiment;

fig. 23c1, fig. 23c2 and fig. 23c3 are diagrams of the human-bed interface indentation displacement in the standing up and sitting state collected in the present embodiment;

fig. 23d1, 23d2 and 23d3 are the compression displacement diagrams of the human-bed interface in the sitting state of the backrest collected in the present embodiment;

FIG. 24 is a waveform diagram of a sleep behavior and respiration situation signal obtained by the present embodiment;

FIG. 25 is a flowchart of the continuous acquisition of the indentation amount matrix of the human-bed interface according to the embodiment.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

As shown in fig. 22-23: in the figure 10 is the user, 11 is the curve of the spine in the coronal plane; when a user 10 changes the sleeping posture and acts during sleeping, the weight distribution of each part of the human body on the mattress can be changed, the human-bed interface indentation area and the indentation displacement can also be changed, and the change of the electric signal output by the linear induction synchronizer synchronous with the human-bed interface indentation change is utilized to obtain signals of the sleeping posture change and the action event occurrence of the sleeper; this is taken as the actual theoretical basis for monitoring.

Example 1

Based on the above design idea, see fig. 1-3 and fig. 21: a nursing bed capable of monitoring sleep behaviors and states of old people comprises a bed screen 1, a bed underframe 2, a skeleton 3, a mattress 5, a plurality of linear induction synchronizers 6, an information collector 7, a host processor 8 and a mobile phone 9;

the bed screen 1 is fixed at one end of a bed underframe 2, and the bed underframe 2 is sequentially provided with a skeleton arrangement frame 3 and a mattress 5 in a matching way from bottom to top; the surface of the mattress 5 is provided with a luminous fabric, and the linear induction synchronizers 6 are uniformly arranged in the mattress 5 in a left-right partition mode to form a linear induction synchronizer matrix; the linear induction synchronizer matrix collects electromotive force variable quantities under the use states of the left side and the right side, the continuously collected electromotive force variable quantities are transmitted to the host processor 8 through the information collector 7, the host processor 8 counts the electromotive force variable quantities through calculation to obtain human-bed interface depression quantity matrix information, the human-bed interface depression quantity matrix information is analyzed to monitor sleeping behaviors, breathing conditions and bed leaving time, the monitoring information is sent to the mobile phone 9, and when abnormal information is monitored, an alarm is given through the host processor 8; when the old people get up or sleep at night, the surface luminous fabric of the mattress 5 is controlled to emit light or dim.

Explanation of the operation principle and process of light emitting fabric: the luminous fabric is a fabric which is woven by adding POFs with different specifications in the weaving process, then performing warp knitting or weft knitting according to a certain weaving process, and finally connecting the POF cluster in the fabric with LED lamp beads, wherein the LED emits light under the control of an IC, and the POF guides the light into the fabric to enable the fabric to emit light. Meanwhile, in consideration of the influence of light on the visual nerves and the sleep quality of the old, the light-emitting fabric emits warm light, and the brightness and the darkening of the light-emitting fabric are both provided with certain time gradients.

It should be noted that the outer fabric of the mattress 5 is a light-emitting fabric, and when the sleeping posture identified by the host processor 8 is the rising sitting posture, the host processor 8 controls the light-emitting fabric to slowly emit light; when the sleeping posture identified by the host processor 8 is supine, left lying or right lying, the host processor 8 controls the light-emitting fabric to slowly darken.

This embodiment can monitor the sleep behavior, and the apnea risk suggestion is from bed time monitoring, and night-light opens etc. is applicable to general old person, the old person of Alzheimer's disease.

Preferably, the bed screen 1 comprises a screen frame 11 and a soft package 12 fixed on the screen frame 11, and the whole bed screen 1 is 800mm higher than the bed surface and slightly higher than the height of the upper trunk of the human body; the soft bag 12 comprises fiber cotton, sponge, latex filling materials and knitted fabrics wrapping the filling materials, the soft bag 12 is divided into a head support 12a and a back support 12b from top to bottom, and support can be fully provided for the head and the back of a person in a sitting posture.

Further, the bed underframe 2 comprises a bed tail plate 21, two bed side plates 22, a bed bottom plate 23, four corner connectors 24 and a plurality of metal sheets 25; the bed tail plate 21, the two bed side plates 22 and the bed bottom plate 23 are fixed through four corner connectors 24, and the corner connectors 25 and each metal block 26 are installed at the same height and used for supporting the skeleton 3.

Further, the bed comprises foldable guardrails 4, wherein the foldable guardrails 4 are arranged on two sides of the bed underframe 2; the foldable guardrail 4 is provided with an adjusting button 41, the upper part of the foldable guardrail is 400mm away from the bed surface, the foldable guardrail has the folding function, and a user can get on or off the bed conveniently.

Referring to fig. 4, fig. 6-14: in a specific example, the skeleton frame 3 comprises a steel frame 31 and a plurality of bamboo spareribs 32 installed in the steel frame 31, and two adjacent bamboo spareribs 32 are spaced by 45mm in the longitudinal direction. Each bamboo rib strip 32 comprises two or three layers of bamboo elastic sheets 329, two metal sleeve heads 321 sleeved at two ends of the two or three layers of bamboo elastic sheets 329 and a hardness adjusting device connected to the bottoms of the two metal sleeve heads 321, wherein the hardness adjusting device is used for adjusting the pressure when the surfaces of the two or three layers of bamboo elastic sheets 329 are stressed, and the hardness adjusting device comprises a supporting base 325, a movable sliding block 326, a metal supporting block 327, an elastic metal round rod 324 and a supporting rod 323; the bottoms of the two metal sleeve heads 321 are respectively connected with the two support rods 323, and each two support rods 323 are clamped between two sides of one end of the support base 325 and fixed with the two support rods; the middle of the supporting base 325 is fixedly sleeved with two metal supporting blocks 327, two moving sliders 326 are respectively sleeved on one ends of the two metal supporting blocks 327 opposite to the outer side of the supporting base 325 in a sliding manner, the elastic metal round rods 324 are specifically four round rods which are respectively tightly attached to two sides of the supporting base 325 and sequentially penetrate through the through holes 3271 of the metal supporting blocks 327 and the through holes 3262 of the moving sliders 326 to be fixedly connected with the through holes 3231 of the bottoms of the supporting rods 323 on the corresponding sides, the supporting rods 323 are fixedly connected with the through holes 3271 of the metal supporting blocks 327, and the supporting rods 323 are connected with the through holes 3262 of the moving sliders 326 in a sliding.

Preferably, the supporting base 325 is provided with scale marks 328 within the sliding range of the movable slider 326, so as to quantify the hardness and softness adjustment; a bolt 3261 is arranged on the movable sliding block 326, the movable sliding block 326 moves left and right on the supporting base 325 by loosening the bolt 3261, and the movable sliding block 326 is fixed on the supporting base 325 by tightening the bolt 3261, so that the hardness adjustment of the nursing bed is completed; the metal sleeve head 321 is provided with two holes 3211 with grooves 3212 in parallel, and the metal sleeve head 322 is used for directly fixing three layers of bamboo spring pieces 329, or placing bayonets 3221 of the metal sleeve head 322 in the grooves 3212 of the holes 3211 for fixing two layers of bamboo spring pieces 329; the steel frame 31 includes outer frame 311 and connects in the vertical braces 312 in outer frame 311 middle part, a plurality of bamboo raft ribs 32 pass through vertical braces 312 divide into double and align to grid in outer frame 311, vertical braces 312 and outer frame 311 all are equipped with the jack 313 that is used for connecting the bamboo raft ribs on the corresponding terminal surface of connecting bamboo raft ribs 32, bamboo raft ribs 32 both ends are equipped with the tenon 3251 with jack 313 matched with.

Referring to fig. 5: specifically, the skeleton 3 can be divided into 7 areas of a head I, a shoulder and back II, a waist III, a hip IV, a thigh V, a shank VI and a foot VII according to the longitudinal direction. According to the principle of human engineering, generally, the pressure of the head I, the pressure of the shoulder and back II and the pressure of the hip IV are higher, the bamboo rib strips 32 with lower hardness are adopted, and the pressure of the waist III, the thigh V, the shank VI and the foot VII are relatively lower, and the bamboo rib strips 32 with higher hardness are adopted. On the basis, each user can also adjust according to the body shape characteristics of the user, and the spine of the old is effectively protected to be in a natural bending state. The hardness of the bamboo rib strips 32 can be adjusted by grading the density, the elastic modulus and the carbonization degree of the bamboo spring pieces and combining the number of layers of the bamboo spring pieces, and the hardness of the bamboo rib strips 32 is higher when the density of the bamboo spring pieces is higher, the elastic modulus is lower, the carbonization degree is higher, and the number of layers is higher.

On one hand, the hardness of the bamboo rib strips can be adjusted by combining the density, the elastic modulus and the carbonization degree of the bamboo spring pieces and the number of layers of the bamboo spring pieces, and the larger the density of the bamboo spring pieces, the smaller the elastic modulus, the higher the carbonization degree and the number of layers, the larger the hardness of the bamboo rib strips; on the other hand, can adjust the elasticity size of bracing piece through portable slider on the bamboo raft rib strip to adjust the hardness of bamboo raft rib strip, move to supporting the base center when removing the slider more, the resin bracing piece is easier the downwarping bamboo raft rib strip hardness is less. The bamboo spareribs with small hardness can be arranged in areas with large pressure, such as the head, the shoulders, the back and the buttocks, so that pressure relief is realized, and the bamboo spareribs with large hardness are arranged at the positions, such as the waist, the thighs, the calves, the feet and the like, so that effective support is realized. Meanwhile, customized adjustment can be performed by combining the body shape characteristics of the user, so that the spine of the user is ensured to be in a natural bending state in the sleeping process.

See fig. 15-20 and 22: the mattress 5 comprises a bedding layer (not shown), a core layer 53 and a fabric composite layer 51 covering the bedding layer and the core layer 53; wherein the fabric composite layer 51 comprises an outer fabric 511, a hard sponge or sponge material 512 and an inner fabric 513; the outer fabric 511 is a light-emitting fabric which slowly brightens and darkens, and the host processor 8 controls the light-emitting fabric to emit light or darken; the inner fabric 513 is a knitted fabric, so that the elasticity of the surface of the mattress can be increased; the hard sponge or sponge material 512 is filled between the outer fabric layer 511 and the inner fabric 513, and the inner fabric layer 511 and the outer fabric layer 513 are directly fixedly connected through quilting; the bedding layer is divided into an upper bedding layer 52a and a lower bedding layer 52b, the upper bedding layer 52a and the lower bedding layer 52b are respectively filled with memory cotton, latex sponge and polyurethane sponge filling materials 521 from top to bottom, and the thickness of the upper bedding layer 52a is larger than that of the lower bedding layer 52 b; the core layer 53 is a foam sponge block or a latex sponge block 531 which coats a plurality of rows of high-low spring bags; each high-low spring bag is made of non-woven fabrics 5321 wrapping the high-low springs 5322, each high-low spring 5322 specifically comprises a large spring 532a which is vertically arranged and two small springs 532b which are respectively fixed at the upper end and the lower end of the large spring, and a gap is formed between the two small springs 532 b; the large spring 532a is independently supported at the part with smaller stress, and is supported together with the two small springs 532b at the part with larger stress, so that the elasticity, the support property and the stability of the mattress are ensured; a linear induction synchronizer matrix is fixed in the fabric composite layer 51.

Example 2

See fig. 22-25: the embodiment also discloses a method for monitoring the sleep behavior and the sleep state of the old by adopting the nursing bed, which comprises the following steps:

s1, continuously collecting electromotive force variation under the use states of the left side and the right side by the linear induction synchronizer matrix, and transmitting the electromotive force variation to the host processor 8 through the information collector 7;

s2, the host processor 8 processes the electromotive force variable quantity, wherein the host processor 8 calculates and analyzes the indentation displacement quantity, the indentation area, the ratio of the indentation displacement quantity and the ratio of the indentation area of each region of the mattress 5 to determine the sleeping behavior;

s3, the host processor 8 determines the breathing condition by calculating and analyzing the sum of derivatives of electromotive force output by the linear induction synchronizer matrix on the mattress 5 to relative time;

s4, the host processor 8 determines the out-of-bed condition by calculating and analyzing the total depression displacement and the total depression area of the human-bed interface.

Specifically, the host processor 8 converts the electromotive force variation of the linear synchronous inductor 6 into a calculation formula of displacement amount as follows:

the function of displacement D (x)_i,x_j) Comprises the following steps:

wherein E is electromotive force; k is an electromagnetic coupling coefficient; x is a displacement amount; w is the winding pitch; um and w are the amplitude and frequency of the excitation voltage; d (x)_i,x_j) Is the displacement of the linear synchronous sensor 6 at the position of the mattress (5i, j); e (x)_i,x_j) Is the output electromotive force of the linear synchronous inductor 6 at the position of the mattress (5i, j);

the host processor 8 combines the calculated displacement of the plurality of linear synchronous sensors into a human-bed interface depression displacement matrix and stores the matrix, and the host processor 8 processes the human-bed interface depression displacement matrix to obtain sleep behavior, respiration condition and bed leaving condition.

Further, the step of the host processor 8 determining the sleep behavior comprises:

(a) the information collector 7 collects the electromotive force variation of the linear synchronous sensor 6 below the pillow and transmits the electromotive force variation to the host processor 8, and the host processor 8 calculates to obtain the depression displacement A generated by the pillow on the mattress 5;

(b) the host processor 8 calculates the indentation displacement of each region of the mattress 5, the indentation area of each region, the ratio of the indentation displacement and the ratio of the indentation area, wherein the indentation displacement of each region of the mattress 5 is the indentation displacement D of the lower leg_LLaterally asymmetric indentation displacement D_cAnd absolute value | D of lateral asymmetric indentation displacement_cL, the laterally asymmetric indentation displacement D_cThe total amount of the indentation displacement of two sides of a symmetrical central curve formed after the shoulder, the waist and the hip are indented, and the indentation area of each area of the mattress 5 is the total indentation area S_tLaterally asymmetric crush area S_cAnd absolute value | S of laterally asymmetric indentation area_cThe ratio of the indentation displacement is the ratio R of the head-hip indentation displacement_hhThe head-hip depression displacement ratio R_hhThe ratio of total depression displacement of the head area except the pillow to total depression displacement of the hip area, and the ratio of depression area is the ratio R of upper trunk depression area to hip depression area_thThe ratio R of the upper trunk area to the hip area_thThe sum of the pressing area of the shoulder, back and waist and the pressing area of the legThe ratio of the products;

when D (x)_i,x_j)>0, S (x)_i,x_j)＝K

When D (x)_i,x_j) When equal to 0, S (x)_i,x_j)＝0

The total pressure sink area S_tThe calculation formula of (2) is as follows:

(c) the amount D of the depression displacement of the lower leg is measured by a Z-score data standardization method_LLaterally asymmetric indentation displacement D_cAbsolute value | D of lateral asymmetric indentation displacement_cTotal pressure sink area S_tLaterally asymmetric crush area S_cAbsolute value of lateral asymmetric indentation area | S_cDisplacement ratio R of head and hip depression_hhAnd the ratio R of the upper trunk area to the hip area_thEight indexes are normalized to form feature vectors for identifying five sleeping postures of supine, left-side lying, right-side lying, standing up and back sitting, and the host processor 8 utilizes a vector machine classifier to process the calculated feature vectors to identify the sleeping postures;

(d) after the host processor 8 identifies the sleeping postures, the sleeping posture keeping time, the sleeping posture time distribution, the sleeping behavior generation time, the turnover times and the times of the occurrence of the immobile segments exceeding the preset time are judged and recorded, and the sleeping behavior is determined.

Further, the step of determining the breathing condition by the host processor 8 further comprises:

(e) the host processor 8 calculates the sum of derivatives of electromotive force output by the linear synchronous sensor 6 on the mattress 5 with respect to time f (t), wherein the peak value of each pulse wave of f (t) is the signal of the upper trunk breathing mode and the sleeping action behavior;

wherein, E (x)_i,x_j) Is the output electromotive force of the logarithmic potentiometer located at the position of mattress 5i, j;

(f) the host processor 8 draws a waveform diagram of the breathing mode of the upper trunk part and the signals of the sleep behaviors relative to time, correspondingly marks the generation time of the sleep behaviors on the waveform diagram, and takes the waveforms corresponding to the time without the sleep behaviors as the signals of the breathing mode of the upper trunk part; generally, the waveform is in a relatively stable, continuous state in frequency and amplitude, and when there is a problem with the user's breathing, the waveform assumes an unstable state. For example, when patients with apnea syndrome experience apnea during sleep, the time of a single breath is prolonged and the respiratory rate is reduced.

(g) The host processor 8 analyzes the waveform of the upper torso breathing pattern signal, marks an apnea event, records and determines the breathing condition by using the duration of a single breathing cycle, the total number of apneas and the duration thereof, an apnea index, an apnea rate and a time node index of the occurrence of the apneas, wherein the apnea index is the ratio of the total time of the apneas to the total number of apneas, and the apnea rate is the ratio of the total time of the apneas to the total sleep time.

Further, the step of the host processor 8 determining the out-of-bed condition further comprises:

(h) the host processor 8 calculates the total depression displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is zero, determining to leave the bed;

the host processor 8 calculates the total depression displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is more than zero, determining to return to the bed;

(i) the host processor 8 records the bed leaving time, records and determines the bed leaving condition by using the total bed leaving times, the total bed leaving time, the single bed leaving time, the bed leaving index, the bed leaving rate and the time node index of the occurrence of the bed leaving behavior, wherein the bed leaving index is the ratio of the total bed leaving time to the total bed leaving times, and the bed leaving rate is the ratio of the total bed leaving time to the total sleep time, and the host processor 8 automatically alarms when judging that the bed leaving time is overtime. The condition of the old people such as thirst, getting up at night and the like is generally adopted when the old people leave the bed, the sleep quality of the old people is influenced by the action of leaving the bed, the frequency and the time of leaving the bed are closely related to the physiological condition of the old people, and the action can be used as one of indexes for reflecting the physiological problem of the old people.

It should be noted that, due to the special physiological state, the old people are easy to have an accident in the process of getting up at night, and timely rescue can effectively avoid the old people from being injured to a deeper degree. The guardian can judge the normal bed leaving time range according to the family conditions, including the distance between the bathroom and the bedroom, the action speed of the old and the like, and set a bed leaving alarm system according to the time range. Taking 20 minutes as an example, the bed leaving alarm system is arranged to obtain the bed leaving time and the record of alarm according to the time sequence.

In a particular implementation, the sleep quality and sleep health analysis may be performed by:

a: when a sleeper lies on the mattress, the mattress is compressed and deformed under the action of the gravity of a human body, the mattress transmits the compression information to the linear induction synchronizer, and the host processor collects and identifies the relevant information of the linear induction synchronizer through the information collector and counts and summarizes actions such as sleeping postures of the user in the sleeping process;

b: evaluating the sleep action behavior pattern by indexes such as action total amount (event total amount), action total time (event duration total time), turnover frequency, occurrence frequency of immobile segments exceeding 10 minutes, occurrence frequency of immobile segments exceeding 20 minutes, occurrence frequency of immobile segments exceeding 30 minutes, retention time of each sleeping posture, time distribution of each sleeping posture, bed leaving frequency, time and the like;

c: the sleep quality is evaluated through the behavior mode, the poor sleep quality is indicated by too frequent action behaviors or too few motionless segments, and whether the action is frequent or not can be reflected by action total amount, action total time and the like; the number of times of leaving the bed and the time can reflect the physiological condition of the old to a certain extent, and the patient with more times of leaving the bed or longer time (excluding external factors such as family environment) may have certain physiological problems, so that the patient can be reminded to carry the old to perform physical examination regularly;

d: and finally, evaluating the sleep quality of the old according to the sleep state records of the old such as sleep behaviors, breathing conditions, bed leaving time and the like, and providing a healthy sleep auxiliary treatment suggestion by combining the human engineering theory and the healthy sleep research.

The monitoring information, the sleep quality and the sleep health analysis report of the embodiment can be fed back to the mobile phone APP, the records of the sleep behavior, the breathing condition and the bed leaving condition can be checked through the mobile phone, and the evaluation report and the treatment suggestion can be checked through the APP.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A nursing bed capable of monitoring sleep behaviors and states of old people is characterized by comprising a bed screen (1), a bed underframe (2), a skeleton arrangement frame (3), a mattress (5), a plurality of linear induction synchronizers (6), an information collector (7), a host processor (8) and a mobile phone (9);

the bed screen (1) is fixed at one end of the bed bottom frame (2), and the bed bottom frame (2) is sequentially provided with the skeleton frame (3) and the mattress (5) in a matching way from bottom to top; the surface of the mattress (5) is provided with a luminous fabric, and the linear induction synchronizers (6) are uniformly arranged in the mattress (5) in a left-right partition mode to form a linear induction synchronizer matrix; the linear induction synchronizer matrix collects electromotive force variable quantities under the using states of the left side and the right side, the continuously collected electromotive force variable quantities are transmitted to the host processor (8) through the information collector (7), the host processor (8) counts the electromotive force variable quantities through calculation to obtain human-bed interface depression quantity matrix information, the sleep behavior, the breathing condition and the bed leaving time are monitored through analyzing the human-bed interface depression quantity matrix information, the monitoring information is sent to the mobile phone (9), and when abnormal information is monitored, an alarm is given through the host processor (8); the surface luminous fabric of the mattress (5) is controlled to shine or darken when the old people get up or sleep at night.

2. The nursing bed capable of monitoring the sleep behaviors and the states of the old people according to claim 1, wherein the rib frame (3) comprises a steel frame (31) and a plurality of bamboo rib strips (32) arranged in the steel frame (31), each bamboo rib strip (32) comprises two or three layers of bamboo elastic sheets (329), two metal sleeve heads (321) sleeved at two ends of the two or three layers of bamboo elastic sheets (329) and a hardness adjusting device connected to the bottoms of the two metal sleeve heads (321), and the hardness adjusting device is used for adjusting the pressure when the surfaces of the two or three layers of bamboo elastic sheets (329) are stressed.

3. The nursing bed capable of monitoring the sleeping behaviors and states of the elderly according to claim 2, wherein the hardness-softness adjusting device comprises a supporting base (325), a movable slider (326), a metal supporting block (327), an elastic metal round bar (324), and a supporting bar (323); the bottoms of the two metal sleeve heads (321) are respectively connected with the two supporting rods (323), and each two supporting rods (323) are clamped at two sides of one end of the supporting base (325) and fixed with the supporting base; the middle of the supporting base (325) is fixedly sleeved with two metal supporting blocks (327), one end, opposite to the supporting base (325), of each of the two metal supporting blocks (327) is sleeved with two movable sliding blocks (326) in a sliding mode, the elastic metal round rods (324) are specifically four and tightly attached to two sides of the supporting base (325) respectively and penetrate through the through holes (3271) of the metal supporting blocks (327) and the through holes (3262) of the movable sliding blocks (326) in sequence to be fixedly connected with the through holes (3231) of the bottoms of the supporting rods (323) on the corresponding sides, the supporting rods (323) are fixedly connected with the through holes (3271) of the metal supporting blocks (327), and the supporting rods (323) are connected with the through holes (3262) of the movable sliding blocks (326) in a sliding mode.

4. The nursing bed capable of monitoring the sleeping behavior and status of the elderly according to claim 2, wherein the supporting base (325) is provided with a graduation mark (328) within the sliding range of the movable slider (326); the movable sliding block (326) is provided with a bolt (3261), the movable sliding block (326) moves left and right on the supporting base (325) by loosening the bolt (3261), and the movable sliding block (326) is fixed on the supporting base (325) by tightening the bolt (3261), so that the hardness and hardness of the nursing bed are adjusted; the metal sleeve head comprises a metal sleeve head (321) and is characterized by further comprising a bamboo inserting sheet (322), wherein the upper end of the metal sleeve head (321) is provided with two holes (3211) with grooves (3212) in parallel, and the holes are used for directly fixing three layers of bamboo elastic sheets (329), or bayonets (3221) of the bamboo inserting sheet (322) are placed in the grooves (3212) of the holes (3211) to fix two layers of bamboo elastic sheets (329); steel frame (31) include outer frame (311) and connect in vertical braces (312) in outer frame (311) middle part, a plurality of bamboo raft ribs (32) pass through vertical braces (312) divide into double and align to grid in outer frame (311), vertical braces (312) and outer frame (311) all are equipped with jack (313) that are used for connecting the bamboo raft rib on the corresponding terminal surface of connecting bamboo raft rib (32), bamboo raft rib (32) both ends are equipped with tenon (3251) with jack (313) matched with.

5. The nursing bed for monitoring the sleeping behavior and status of the elderly according to claim 1, wherein the mattress (5) comprises a bedding layer, a core layer (53) and a fabric composite layer (51) covering the bedding layer and the core layer (53); wherein the fabric composite layer (51) comprises an outer fabric (511), a hard sponge or sponge material (512) and an inner fabric (513); the outer fabric (511) is a luminous fabric, and the host processor 8 controls the luminous fabric to emit light or darken; the inner fabric (513) is a knitted fabric; the hard sponge or sponge material (512) is filled between the outer fabric layer (511) and the inner fabric (513), and the inner fabric layer (511) and the outer fabric layer (513) are directly fixedly connected through quilting; the bedding layer is divided into an upper bedding layer (52a) and a lower bedding layer (52b), the upper bedding layer (52a) and the lower bedding layer (52b) are respectively filled with memory cotton, latex sponge and polyurethane sponge filling materials (521) from top to bottom, and the thickness of the upper bedding layer (52a) is larger than that of the lower bedding layer (52 b); the core layer (53) is a foam sponge block or a latex sponge block (531) coated with a plurality of rows of high-low spring bags; each high-low spring bag is made of non-woven fabrics (5321) wrapping a high-low spring (5322), each high-low spring (5322) specifically comprises a large spring (532a) which is vertically arranged and two small springs (532b) which are respectively fixed at the upper end and the lower end of the large spring, and a gap is formed between the two small springs (532 b); the linear induction synchronizer matrix is fixed in the fabric composite layer (51).

6. A method of monitoring using a care bed according to any of claims 1-5 for monitoring the sleeping behaviour and status of elderly persons, comprising the steps of:

s1, the linear induction synchronizer matrix transmits the continuously acquired electromotive force variation under the use states of the left side and the right side to the host processor (8) through the information acquisition device (7);

s2, the electromotive force variable quantity is processed by the host processor (8), wherein the host processor (8) calculates and analyzes the indentation displacement quantity, the indentation area, the ratio of the indentation displacement quantity and the ratio of the indentation area of each region of the mattress (5) to determine the sleep behavior;

s3, the host processor (8) determines the breathing condition by calculating and analyzing the sum of derivatives of electromotive force output by the linear induction synchronizer matrix on the mattress (5) to relative time;

s4, the host computer processor (8) determines the out-of-bed condition by calculating and analyzing the total depression displacement and the total depression area of the human-bed interface.

7. The method for monitoring the nursing bed according to claim 6, wherein the host processor (8) converts the electromotive force variation of the linear synchronous sensor (6) into the displacement according to the following formula:

the function of displacement D (x)_i,x_j) Comprises the following steps:

wherein E is electromotive force; k is an electromagnetic coupling coefficient; x is a displacement amount; w is the winding pitch; um and w are the amplitude and frequency of the excitation voltage; d (x)_i,x_j) Is the displacement of the linear synchronous sensor (6) at the position of the mattress (5) (i, j); e (x)_i,x_j) Is the output electromotive force of a linear synchronous inductor (6) positioned at the position of a mattress (5) (i, j);

the host processor (8) combines the calculated displacement of the plurality of linear synchronous sensors into a human-bed interface indentation displacement matrix and stores the matrix, and the host processor (8) processes the human-bed interface indentation displacement matrix to obtain sleep behavior, respiration condition and bed leaving condition.

8. The method of monitoring a care bed as claimed in claim 7, wherein the step of the host processor (8) determining the sleep behaviour comprises:

(a) the information collector (7) collects the electromotive force variation of the linear synchronous sensor (6) below the pillow and transmits the electromotive force variation to the host processor (8), and the host processor (8) calculates to obtain the depression displacement A generated by the pillow on the mattress (5);

(b) the host processor (8) calculates the indentation displacement of each region, the indentation area of each region, the ratio of the indentation displacement and the ratio of the indentation area of the mattress (5), and the indentation displacement of each region of the mattress (5) is the indentation displacement D of the lower leg_LLaterally asymmetric indentation displacement D_cAnd absolute value | D of lateral asymmetric indentation displacement_cL, the laterally asymmetric indentation displacement D_cThe total amount of the indentation displacement on two sides of a symmetrical central curve formed after the shoulder, the waist and the hip are indented, and the indentation area of each area of the mattress (5) is the total indentation area S_tLaterally asymmetric crush area S_cAnd absolute value | S of laterally asymmetric indentation area_cThe ratio of the indentation displacement is the ratio R of the head-hip indentation displacement_hhThe head-hip depression displacement ratio R_hhThe ratio of total depression displacement of the head area except the pillow to total depression displacement of the hip area, and the ratio of depression area is the ratio R of upper trunk depression area to hip depression area_thThe ratio R of the upper trunk area to the hip area_thThe ratio of the sum of the press-fit areas of the shoulder and back parts and the waist part to the press-fit area of the leg part;

the lateral asymmetric indentation displacement D_cIs calculated byThe formula is as follows:

when D (x)_i,x_j)>0, S (x)_i,x_j)＝K

When D (x)_i,x_j) When equal to 0, S (x)_i,x_j)＝0

The total pressure sink area S_tThe calculation formula of (2) is as follows:

(c) the amount D of the depression displacement of the lower leg is measured by a Z-score data standardization method_LLaterally asymmetric indentation displacement D_cAbsolute value | D of lateral asymmetric indentation displacement_cTotal pressure sink area S_tLaterally asymmetric crush area S_cAbsolute value of lateral asymmetric indentation area | S_cDisplacement ratio R of head and hip depression_hhAnd the ratio R of the upper trunk area to the hip area_thEight indexes are normalized to form feature vectors for identifying five sleeping postures of supine, left side lying, right side lying, standing up and back sitting, and the host processor (8) utilizes a vector machine classifier to process the calculated feature vectors to identify the sleeping postures;

(d) after the sleeping postures are identified, the host processor (8) judges and records the sleeping posture holding time, the sleeping posture time distribution, the sleeping behavior generation time, the turnover frequency and the frequency of occurrence of the immobile segments exceeding the preset time, and determines the sleeping behavior.

9. The method of monitoring a care bed as recited in claim 8, wherein the step of the host processor (8) determining the breathing condition further comprises:

(e) the host processor (8) calculates the sum of derivatives of electromotive force output by the linear synchronous inductor (6) on the mattress (5) to relative time, wherein the peak value of each pulse wave of f (t) is a signal of the upper trunk breathing mode and the sleep action behavior;

wherein, E (x)_i,x_j) Is the output electromotive force of a logarithmic potentiometer located at the position of the mattress (5) (i, j);

(f) the host processor (8) draws a waveform diagram of the breathing mode of the upper trunk part and the signals of the sleep behaviors relative to time, correspondingly marks the generation time of the sleep behaviors on the waveform diagram, and takes the waveforms corresponding to the time without the sleep behaviors as the signals of the breathing mode of the upper trunk part;

(g) the host processor (8) analyzes the waveform of the upper trunk breathing mode signal, marks an apnea event, records and determines the breathing condition by using the duration of a single breathing cycle, the total number of apneas and the duration thereof, an apnea index, an apnea rate and a time node index of the occurrence of the apneas, wherein the apnea index is the ratio of the total time of the apneas to the total number of the apneas, and the apnea rate is the ratio of the total time of the apneas to the total sleep time.

10. The method of monitoring a care bed as recited in claim 8, wherein the step of the host processor (8) determining an out-of-bed condition further comprises:

(h) the host processor (8) calculates the total pressure sink displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is zero, determining to leave the bed;

the host processor (8) calculates the total pressure sink displacement D of the human-bed interface_tAnd total pressure sink area S_tWhen the time is more than zero, determining to return to the bed;

(i) the host processor (8) records the bed leaving time, records and determines the bed leaving condition by using the total bed leaving times, the total bed leaving time, the single bed leaving time, the bed leaving index, the bed leaving rate and the time node index of the occurrence of the bed leaving behavior, wherein the bed leaving index is the ratio of the total bed leaving time to the total bed leaving times, and the bed leaving rate is the ratio of the total bed leaving time to the total sleep time, and when the host processor (8) judges that the bed leaving time is overtime, an automatic alarm is given.