CN107174428A - Medical bed for nursing care anti-drop system and method - Google Patents

Medical bed for nursing care anti-drop system and method Download PDF

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Publication number
CN107174428A
CN107174428A CN201710515619.XA CN201710515619A CN107174428A CN 107174428 A CN107174428 A CN 107174428A CN 201710515619 A CN201710515619 A CN 201710515619A CN 107174428 A CN107174428 A CN 107174428A
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China
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time
guardrail
pin
state
patient
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Inventor
丁海飞
方红薇
沈玉萍
陆乙君
徐蓉
张俊
吴明光
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No3 People's Hospital Hangzhou City
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No3 People's Hospital Hangzhou City
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/1036—Measuring load distribution, e.g. podologic studies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6891—Furniture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/0507—Side-rails
    • A61G7/0508—Side-rails characterised by a particular connection mechanism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/34—General characteristics of devices characterised by sensor means for pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Physics & Mathematics (AREA)
  • Nursing (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

The present invention discloses a kind of medical bed for nursing care anti-drop system and method, and system is made up of diaphragm pressure sensor array module, multichannel gating and scaling module, guardrail state-detection and control module, signal transacting main control module, direct current carrier communication module, nurse station monitor terminal.Diaphragm pressure sensor gathers the pressure distribution of sickbed patients, infers position during sleep；Based on pendant bed statistics, guardrail is automatically adjusted；Both pendant bed accident rate and nursing work load are reduced, and to patient there is provided the limbs free degree as big as possible.Collision bead electrical contact sensor detects guardrail state, and guardrail state is controlled using solid-state relay, simple and reliable；Anti-drop system uses 24V direct current supplys, essential safety；Guard bar lifting is realized by dovetail groove sliding pair+dead bolt/hole, dexterous practical.

Description

Medical bed for nursing care anti-drop system and method
Technical field
The invention belongs to medical nursing bed technique category, the body pressure point of diaphragm pressure sensor collection sickbed patients is particularly related to Cloth, infers position during sleep, with reference to the anti-drop system and method for pendant bed statistics regulation guardrail.
Background technology
It is medical care bed be sickbed patients be in hospital/go home treatment when indispensable standard configuration apparatus.According to use occasion Difference, can be divided into household nursing bed and medical bed for nursing care；The object positioning medical bed for nursing care being discussed herein.If from nursing function Visual angle is considered, and basic function care bed is divided into again and multifunction nursing bed；Basic function care bed passes through hand machine driving Mode is there is provided standing up, sitting and lying, the basic function such as have a meal, and automaticity is relatively low, and comfortable sexual experience is poor；It is multifunction nursing bed On basic function care bed, set up and stand up, bent leg, enter medical treatment and the hommization functions, tool such as lavatory, hair washing foot bath, life ＆ amusement There are higher automation and comfortableness.The power of basic function care bed is produced by artificial hand mode；It is multifunction nursing bed Power source then have pneumatic, hydraulic pressure and motor three types, wherein main flow type of drive is the linear electric pushrod of direct current.Letter speech It, the medical basic function care bed of traditional hand-operated mechanical formula, modern electric intelligent medical multifunctional nursing bed, in difference Change to complement each other in market and bring out the best in each other；Both comprehensive assessments TCO, O＆M the technical threshold, " river of medical basic function care bed Lake eldest child " status still " rote remains unchanged ", although the accounting of medical multifunctional nursing bed is in growing trend year by year.Medical bed for nursing care Global hit product has：Model-S-382-Vis- à-the vis of German Sandra Vōlker company are multifunction nursing bed, and the happy dream of Japan eight is public The CA-29B of department is electric care bed etc.；Medical multifunctional nursing bed is based oneself upon herein inquires into anti-drop system.
Medical multifunctional nursing bed abbreviation medical bed for nursing care, by bed structure unit, Motorized drive unit, control communication unit Member composition；Bed structure unit includes bedstead, bed panel, backrest, guardrail, additional structure (such as dining table, Infusion support)；Power drives The power source of moving cell, the linear electric pushrod of unquestionable first choice direct current, the drive mechanism of Motorized drive unit, non-connecting rod machine Structure does not belong to；Control communication unit using MCU as core, nursing is performed in accordance with doctor's advice：Bed body posture is adjusted by Motorized drive unit, Information is exchanged with nurse station monitor terminal.Medical bed for nursing care design need to take into account and be required of both function and safety；Follow《China People's republic's pharmaceuticals industry standard, medical electrical equipment (part 2)：Hospital's beddo secure private requirement (YY0571- 2005)》, the equivalent international standard IEC60601--2--38 of the standard：1996《Medical electrical equipment -- the 2nd part：Hospital is electronic Bed secure private requirement》And modification part 1：1999.
The unremitting Innovation Input of industry, promotes the persistence techniques progress of medical bed for nursing care.Bed structure unit is breached Classical adjustable three bending machines plate is designed, and the novel designs such as four, six, eight bending machine plates emerge in an endless stream, and add bed structure unit The free degree and flexibility.The Designing Linkages of Motorized drive unit, no longer adhere rigidly to function realization and the strength modification of low level, It is intended to pursue higher level experience satisfaction：It is theoretical based on ergonomics, application《Ergonomics is illustrated》Data, optimize connecting rod The structure snd size of mechanism, make the compatible degree MAX of sickbed patients center of rotation and linkage center of rotation, i.e. patient enjoys most Good experience.The intellectuality of control communication unit becomes better and approaching perfection day by day, and improves the ease for use reliability of medical bed for nursing care, and hospital Nursing quality and integration of information system degree.
Medical bed for nursing care manufacturer payes attention to the function of product, from the pre- counteracting bedsores of turning body, bends and stretches leg physical rehabilitation, continuation to life Manage parameter monitoring, assisting sleep, temperature control.Something lost is shaken, the Zhui Chuan Shi that expose when manufacturer is to nursing thus lack due Concern；Lost in understanding it is biased, there are serious mistaken ideas, simply arbitrarily Jiang Shi thus be all attributed to the carelessness faults of user, Do not attempt to improve product, polishing short slab.Manufacturer notices the harmless environmental protection of product selection, also puts forth effort to exclude switch, exposed electricity The potential danger that line gets an electric shock, or even try to avoid vision, hearing, touch from feeling the intense stimulus to patient；But it is single to perplex medical treatment for many years The Zhui Chuan Shi events of position, are not included in manufacturer's Yi Shi schedules so far, and the specific aim solution thousand for reducing or preventing Zhui Chuan Shi events is exhaled Ten thousand do not call out not come out.The actual motion environment of close examination medical bed for nursing care is investigated, a undisputable fact is that bed is fallen present in product Shi events hidden danger will at double be amplified by " actual motion environment ".
First, the medical care ratio of China is unreasonable., thousand people nurse's numbers 1.52, medical care ratio 1 in 2010： 0.85.2015 Year, thousand people nurse's numbers 2.36, registered nurse 324.1 ten thousand, medical care ratio 1:1.07；The Qun of the Daoing Zhi borders of medical care ratio must be reversed eventually. The year two thousand twenty, the Vision plan of planning commission's promulgation is defended according to country, registered nurse 4,450,000, thousand people nurse's numbers 3.14.The nurse of China Culture, longitudinal direction contrast has been made brilliant achievements；With developed country 1：3 medical care ratio is made laterally to compare, and still has a long way to go.No Hard to imagine, the daily working strength of nurse is big, and the psychology pressure born is big big.Therefore, pendant bed hidden danger hope nurse's reinforcing is patrolled Look into and remedy, it is not only unrealistic but also without may.Secondly, the present situation of nurse troop makes people worried.The huge nursing breach that nurse reserves, is leaned on The nurse of " distinct Chinese characteristics " fills up.Nurse's survey data that X is saved is as follows, M-F 13.3%：86.7%, 50-59 Sui 49.9%, the agriculture registered permanent residence 88%, primary school and following 57.9%, not trained 43.1%, " three kinds of social insurances " 64.5% are not bought, it is overall The career identity sense of troop is low.Obviously, pendant bed hidden danger hope nurse reinforcing inspection is remedied, and applying mechanically a buzzword, " you think many ".3rd, the aging process of China.2015, more than 60/80 years old old man 2.12/0.2339 hundred million, disability disabled with half 40000000；The year two thousand fifty, more than 60/80 years old old man 4.92/1.2 hundred million；Hundreds of millions of silver hair main forces are undoubtedly the of pendant bed hidden danger Three multiplier amplifiers.
Medical bed for nursing care and the more representational intellectual property Summary on research results of anti-drop system are as follows：
Patent of invention " new pattern electric nursing bed " (ZL200610047957.7), proposes to set in recessed area, area in the middle part of bed If coincideing slide plate, backboard is connected by drive mechanism with slide plate；Backboard, which is laid flat, makees common bed；Backboard is tilted with slide plate to bed body one Break away out, sofa can be made by leg is sagging, read, read newspaper, have a meal.
Patent of invention " nursing bed automatic closet device " (ZL200710175420.3), proposes to install just solution dress under bedstead Put, including Du Dian mechanisms, toilet mechanism, horizontal drive mechanism and upright driving mechanism, facilitate patient-sized just and will not be dirty Contaminate environment.
Patent of invention " bedsore prevention massage body-turning nursing bed " (ZL200810158565.7), proposes that mobile bed board passes through a left side Right connection board is connected, and left/right connecting plate is connected with two electronic cylinders that push away, and four electronic cylinders that push away are installed on movable stand.Nursing Bed patient removes a segment distance and stood up again, will not be amesiality after standing up, can pre- counteracting bedsores generation.
Patent of invention " having the intellectual nursing bed of anti-drop function " (application number 200810037052.0), proposition uses four Individual load sensor, two sets of detective devices using infrared rays, collection judge the position of centre of gravity and state of patient, the hair of pre- anti-fall bed accident It is raw.
It is above-mentioned to benefit our pursuits, propose the Multifunctional design of care bed and anti-fall behave." care bed " retrieval " title " is inputted, Invention/utility patent is up to 567/2694；Take a broad view of research outstanding achievement, Functional Design of the hot focus in care bed：Stand up anti-cotton-padded mattress Auxiliary treatment, bends and stretches the rehabilitation of four limbs, life convenient of automatic closet etc..On the other hand, it is related to care bed secure side The patent in face is few, is even more very few around the anti-fall patent of care bed.Inpatient falls bed, the body of patient harm Health, increases medical treatment cost, easily causes medical tangle.The anti-drop system of medical bed for nursing care is typical system engineering；Collect pendant The statistics of Chuan Shi events, the inherent law that Fen analyses Wa Jue Shi therefore formed, is the successful necessary condition of system engineering；Define system Restrained boundary during engineering construction, proposes targetedly technology path and solution, is the successful adequate condition of system engineering.
Analysis falls bed statistics, Zhui Chuan Shi therefore the inherent law with statistical significance：Fall bed patient age, 50 one full year of life The elderly above is in the majority；Fall bed high incidence period, the deep sleep phase of morning 1-5 points；The You of bed most relevance degree is fallen because of Shi parts Be patient after an action of the bowels, the guardrail fallen is forgotten to pull on what is urged；Therefore it is necessary to detect and automatically adjust guardrail state.In addition, patient And relatives repel the constraint body anti-drop method outside doctor's advice strongly；Therefore get over restrained boundary realize it is anti-fall.Ergonomics and《People Body engineering science is illustrated》Show, position when pendant bed is with sleep is relevant.Obviously, by diaphragm pressure sensor, the body of patient is gathered Pressure distribution；Position when inferring sleep is also necessary.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art there is provided a kind of anti-drop system of medical bed for nursing care and method.
Medical bed for nursing care anti-drop system by diaphragm pressure sensor array module, multichannel gating and scaling module, Guardrail state-detection and control module, signal transacting main control module, direct current carrier communication module, nurse station monitor terminal composition； Medical bed for nursing care number=N >=1, medical bed for nursing care anti-drop system is corresponded with medical bed for nursing care, nurse station monitor terminal number ≡ 1；Diaphragm pressure sensor array module is connected through multichannel gating and scaling module, with signal transacting main control module, protects Column state-detection and control module are connected with signal transacting main control module, and signal transacting main control module is through direct current carrier communication mould Block, it is connected with nurse station monitor terminal；Signal transacting main control module and nurse station monitor terminal networking, it then follows Modbus--RTU Agreement, nurse station monitor terminal is main frame, and signal transacting main control module is slave；
Diaphragm pressure sensor array module includes the 1st diaphragm pressure sensor, the 2nd diaphragm pressure sensor, is incremented to 32nd diaphragm pressure sensor, totally 32, diaphragm pressure sensor model A301, geometric parameter Φ=9.5mm, thickness 0.208mm； 32 diaphragm pressure sensor axial symmetry, the head/back of the body/seat/leg configurations are in length × wide=1960mm × 900mm rectangles, head Portion, back, portions, leg are respectively configured 4,12,8,8 diaphragm pressure sensors；Make the midpoint of rectangle top former for coordinate system The coordinate of 16 diaphragm pressure sensors is as follows on the right side of point, rectangle：
Sensor sequence number X-coordinate (mm) Y-coordinate (mm) Sensor sequence number X-coordinate (mm) Y-coordinate (mm)
102 50 80 104 50 160
107 100 300 108 200 300
111 100 550 112 200 550
115 100 800 116 200 800
119 100 900 120 200 900
123 100 1000 124 200 1000
127 150 1250 128 300 1250
131 150 1500 132 300 1500
Described multichannel gating and scaling module include multichannel gating circuit, scaling circuit, multichannel Gating circuit is by core of ADG732 chips, scaling circuit is using AD8615 as core；1st diaphragm pressure sensor, the 2nd Diaphragm pressure sensor, be incremented to the 32nd diaphragm pressure sensor 32 tunnels output, respectively with ADG732 pin 12,11 ..., 40 phases Even, i.e., respectively with ADG732 ports S1, S2, be incremented to S32 and be connected；ADG732 pin 15,16,17,18,19 respectively with signal The ATmega128 pin 35,36,37,38,39 for managing main control module are connected, and ADG732 pin 43 are connected with AD8615 pin 3；R221And R222 Termination AD8615 pin 4, the other end is grounded respectively, AD8615 pin 1, AD8615 pin 1 and signal transacting main control module ATmega128 pin 61 are connected；Diaphragm pressure sensor array module exports 32 road pressure signals, signal transacting master control module controls ADG732, from 32 road pressure signals select 1, output signal UD, UDU is exported after being nursed one's health through AD8615O=(1+R222/R221)×UD, The U of signal transacting main control module sampling processing AD8615 outputsO。
Described guardrail state-detection and control module include guardrail state detection circuit, shield column control circuit；Guardrail shape State detection circuit use collision bead electrical contact sensor, during guardrail " pulling on "/" falling " state, collision bead with conduction locating piece contact/ Depart from；Conductive locating piece ground connection, is half up-small and down-big round table-like body of aperture, peace is flushed with the fix bar circular arc side top of guardrail Dress, collision bead electrical contact sensor is embedded in the elevating lever of guardrail, just the fix bar center of arc point to guardrail；Collision bead passes through metal elastic Spring is interconnected, all the way through R3015V is met, another road is connected with the ATmega128 pin 25 of signal transacting main control module；Guardrail " pulls on " shape State, collision bead is grounded through conductive locating piece, and 0V is exported to ATmega128 pin 25, and guardrail " falls " state, 5V export to ATmega128 pin 25；Protect column control circuit and use IRFP150 type solid-state relays SSR401, electromagnet L401； SSR401Control Port connects the ATmega128 pin 48, SSR of signal transacting main control module401Two output ports through power supply, L401It is connected；L401 Release/locking of dead bolt when logical/dead electricity correspondence elevating lever " falls " state, dead bolt locking when elevating lever " falls " state can be borrowed The hand switch set up is helped to be transferred to release；Dead bolt and shield column control circuit are inlaid in fix bar, and dead bolt hole is reserved on elevating lever；
The mechanical device of anti-fall guardrail includes the fix bar of guardrail, the elevating lever of guardrail, and elevating lever is the length of two ends circular arc Square hexahedron, the bottom of elevating lever is installed by compression spring, elastic force F >=elevating lever gravity+20N；Fix bar uses swallow with elevating lever Stern notch sliding pair coordinates, and planar wall dovetail slot lifting of the elevating lever along fix bar circular arc rectangular parallelepiped hole is slided, lifting carriage It is related to the flow path switch of two states of " pulling on "/" falling "；" falling " State Transferring is into " pulling on " state：Stir hand switch or L401Be powered, the dead bolt of locking elevating lever " falling " is retracted release elevating lever, the compression spring of elevating lever bottom promote elevating lever to Upper to slide, until collision bead is contacted with conductive locating piece, upper limit, be converted into " pulling on " state, " pulling on " State Transferring is into " dropping Under " state：Artificial pressure elevating lever, dead bolt protrudes into dead bolt hole, locking elevating lever, lower limit, is converted into " falling " state.
Described signal transacting main control module using ATmega128 chips as core, ATmega128 pin 51,50,49 respectively with The MM1192 pin 1,5,6 of direct current carrier communication module are connected；ATmega128 controls multichannel gating circuit, gates diaphragm pressure 1 tunnel in 32 road pressure signals of sensor array module output, collection is nursed one's health Hou Gai roads pressure through scaling circuit and believed Number；ATmega128 passes through guardrail state detection circuit, shield column control circuit, detection and the state for controlling guardrail.
Described direct current carrier communication module is using MM1192 chips as core；MM1192 pin 6,1 are respectively through R2、R1Ground connection, C1Two ends are connected with MM1192 pin 3,4 respectively；MM1192 pin 15,16 are respectively through R7And C6、R6And C5Access carrier output it is negative, Anode, MM1192 pin 11 and VCCAnd C2One end is connected, C2The other end is connected with MM1192 pin 13；D1And D2Series connection, D3And D4Series connection, D2And D4The other end is grounded, D1And D3The other end is connected with MM1192 pin 14,12 respectively；R3、R4One end respectively with MM1192 pin 14th, 12 be connected, the other end respectively with MM1192 pin 9 and L1One end, pin 10 and L2One end is connected；L1、L2The other end simultaneously meets R3, point Not through C3、C4The positive and negative end of access carrier output；Signal transacting main control module and nurse station monitor terminal composition direct current carrier Modbus networks, using RTU message frame formats：The byte of address 1, the byte of function code 1, data account for 0~252 byte, CRC check 2 Between byte, message frame >=3.5 character time interval；The first character section of message frame be address, address values scope be 0~ 255, address 0 is broadcast address, and function code value is 1~255.
The anti-drop method of the medical bed for nursing care anti-drop system, method flow includes the initialization flow of anti-drop method, prevents The execution flow of drop method；
Variable declaration
High-risk time zone high risk time interval, Time_HRI, Time_HRI ∈ [1,5]
High-risk patient high risk patient, Patient_HR, 1/0=Yes/No
High-risk time high risk time, Time_HR, 1/0=Yes/No
Guardrail state guardrail state, State_guardrail, 1/0=are pulled on/fallen
Fall time lower time, Time_lower
Fall time counter lower time counter, Time_LC
Fall value lower the time0 value, Time0_LV=0min of time 0
Fall value lower the time1 value, Time1_LV=5min of time 1
Fall value lower the time2 value, Time2_LV=15min of time 2
Fall value lower the time3 value, Time3_LV=30min of time 3
Fall value lower the time4 value, Time4_LV=60min of time 4
The pressure of 1st diaphragm pressure sensor is designated as P101, by that analogy to P132
Pressure matrix Press Matrix, MP []9×4, initialization MP []9×4=FFFF
MP [1,1]=MP [Isosorbide-5-Nitrae]=MP [2,1]=MP [2,4] ≡ FFFF, FFFF characterize unused
MP[]9×4Row 1,2/3,4 storage bed a left side, in it is to the left/in the right, right cell pressure
MP[]9×4Row 1,2/3,4,5/6,7/8,9 is the head/back of the body/seat/leg cell pressure of bed
MP [1,2]=P101, MP [1,3]=P102, MP [2,2]=P103, MP [2,3]=P104
MP [3,1]=P105, MP [3,2]=P106, MP [3,3]=P107, MP [3,4]=P108
……
MP [9,1]=P129, MP [9,2]=P130, MP [9,3]=P131, MP [9,4]=P132
Sensor pressure Press Column, PC []1×4,In k=1,2,3,4 bed Portion and the horizontal position criterion on right side
Criterion 1-- centers are sleeping：PC [3] ＞ PC [4] and PC [2] ＞ PC [4]
Criterion 2-- is to the right sleeping：PC [3] ＞ PC [4] and PC [2] ＜ PC [4]
It is sleeping on the right side of criterion 3--：PC [3] ＜ PC [4] and PC [2] ＜ PC [3]
Criterion 4-- is non-, and rule are sleeping：Outside above-mentioned 3 kinds of criterions, it is included into " to the right sleeping "
Producing condition classification explanation
Operating mode 0--Patient_HR=1, Time_HR=1, right side are crouched, Time_lower=Time0_LV
Operating mode 11--Patient_HR=1, Time_HR=1, to the right sleeping, Time_lower=Time1_LV
Operating mode 12--Patient_HR=1, Time_HR=0, right side are crouched, Time_lower=Time1_LV
Operating mode 13--Patient_HR=0, Time_HR=1, right side are crouched, Time_lower=Time1_LV
Operating mode 21--Patient_HR=1, Time_HR=1, center are sleeping, Time_lower=Time2_LV
Operating mode 22--Patient_HR=1, Time_HR=0, to the right sleeping, Time_lower=Time2_LV
Operating mode 23--Patient_HR=0, Time_HR=1, to the right sleeping, Time_lower=Time2_LV
Operating mode 24--Patient_HR=0, Time_HR=0, right side are crouched, Time_lower=Time2_LV
Operating mode 31--Patient_HR=1, Time_HR=0, center are sleeping, Time_lower=Time3_LV
Operating mode 32--Patient_HR=0, Time_HR=1, center are sleeping, Time_lower=Time3_LV
Operating mode 33--Patient_HR=0, Time_HR=0, to the right sleeping, Time_lower=Time3_LV
Operating mode 4--Patient_HR=0, Time_HR=0, center are sleeping, Time_lower=Time4_LV
The initialization flow of anti-drop method
By doctor's advice Patient_HR=1/0, MP []9×4=FFFF
Time_HR=1, Time_HRI ∈ [1,5]
State_guardrail=Time_LC=Time_lower=0
Time0_LV=0, Time1_LV=5, Time2_LV=15
Time3_LV=30, Time4_LV=60
The execution flow of anti-drop method
1st, read time, reference Time_HRI, Time_HR=1 or 0
2nd, collection collision bead electrical contact sensor voltage, State_guardrail=1 or 0
3rd, the 1st~32 diaphragm pressure sensor pressure P101~P132 is read
Assignment pressure matrix MP []9×4=P101~P132
4th, row pressure PC [] is calculated1×4, based on criterion 1~4, obtain horizontal position
5th, according to Patient_HR, Time_HR, horizontal position, Time_lower is obtained
6th, 6-1State_guardrail=1, then Time_LC=0, is returned " 1 "
6-2State_guardrail=0, Time_LC timing
If Time_LC ＜ Time_lower, are returned " 1 "
Otherwise signal transacting main control module performs elevating lever " pulling on " operation
Alarm, Time_LC=0, are returned " 1 ".
The present invention has an advantageous effect in that compared with background technology：
Diaphragm pressure sensor gathers the pressure distribution of sickbed patients, infers position during sleep；Based on pendant bed statistics money Material, automatically adjusts guardrail；Both pendant bed accident rate and nursing work load are reduced, and limbs freedom as big as possible is provided to patient Degree.Collision bead electrical contact sensor detects guardrail state, and guardrail state is controlled using solid-state relay, simple and reliable；Anti-drop system Using 24V direct current supplys, essential safety；Guard bar lifting is realized by dovetail groove sliding pair+dead bolt/hole, dexterous practical.
Brief description of the drawings
Fig. 1 (a) is the theory diagram of medical bed for nursing care anti-drop system；
Fig. 1 (b) is the arrangement figure of diaphragm pressure sensor array；
Fig. 1 (c) is the structure diagram of medical bed for nursing care；
Fig. 2 is multichannel gating and the circuit diagram of scaling module；
Fig. 3 (a) is the circuit block diagram of guardrail state-detection and control module；
Fig. 3 (b) is guardrail state detection circuit figure；
Fig. 3 (c) is guardrail electric operation control circuit figure；
Fig. 3 (d) is elevating lever and guard bar structure schematic diagram；
Fig. 3 (e) is dead bolt and dead bolt hole schematic diagram；
Fig. 4 is the circuit diagram of signal transacting main control module；
Fig. 5 (a) is the circuit diagram of direct current carrier communication module；
Fig. 5 (b) is the RTU message frame formats of Modbus agreements；
Fig. 6 (a) is medical bed for nursing care anti-drop method flow chart；
Fig. 6 (b) is the initialization flowchart of anti-drop method；
Fig. 6 (c) is the execution flow chart of anti-drop method.
Embodiment
As shown in Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), medical bed for nursing care anti-drop system is by diaphragm pressure sensor array module 100th, multichannel gating and scaling module 200, guardrail state-detection and control module 300, signal transacting main control module 400th, direct current carrier communication module 500, nurse station monitor terminal 600 are constituted；Medical bed for nursing care number=N >=1, medical bed for nursing care Anti-drop system is corresponded with medical bed for nursing care, the number of nurse station monitor terminal 600 ≡ 1；Diaphragm pressure sensor array module 100 It is connected through multichannel gating and scaling module 200, with signal transacting main control module 400, guardrail state-detection and control mould Block 300 is connected with signal transacting main control module 400, and signal transacting main control module 400 is through direct current carrier communication module 500, with protecting Scholar station monitor terminal 600 is connected；Signal transacting main control module 400 and the networking of nurse station monitor terminal 600, it then follows Modbus-- Rtu protocol, nurse station monitor terminal 600 is main frame, and signal transacting main control module 400 is slave；
Diaphragm pressure sensor array module 100 includes the 1st diaphragm pressure sensor 101, the 2nd diaphragm pressure sensor 102nd, the 32nd diaphragm pressure sensor 132 is incremented to, totally 32, diaphragm pressure sensor model A301, geometric parameter Φ= 9.5mm, thickness 0.208mm；32 diaphragm pressure sensor axial symmetry, the head/back of the body/seat/leg configurations are in length × wide=1960mm In × 900mm rectangles, head, back, portions, leg are respectively configured 4,12,8,8 diaphragm pressure sensors；Make rectangle top Midpoint be coordinate origin, the coordinate of 16 diaphragm pressure sensors is as follows on the right side of rectangle：
Medical multifunctional nursing bed abbreviation medical bed for nursing care, by bed structure unit, Motorized drive unit, control communication unit Member composition；Bed structure unit includes bedstead, bed-rest, Cribguard, dining table and bed Infusion support attachment device；Control communication unit Using MCU as core, nursing is performed in accordance with doctor's advice：Bed body posture is adjusted by Motorized drive unit, with nurse station monitor terminal friendship Change information.
Illustrate 1：Consider the integrality of statement, sketch the composition of medical bed for nursing care；Medical bed for nursing care anti-drop system is independent In medical bed for nursing care.Considered for simplicity of exposition, the diaphragm pressure sensor of axial symmetry configuration only lists on the right side of bed 16 Coordinate, the coordinate that left side is 16：Y-coordinate is identical, X-coordinate take it is negative.Nurse station monitor terminal belongs in knowledge category, figure with void Wire frame is marked, and is only referred in text and is not deployed description.
As shown in Fig. 2 multichannel gating and scaling module 200 include multichannel gating circuit 210, scaling electricity Road 220, multichannel gating circuit 210 is by core of ADG732 chips, scaling circuit 220 is using AD8615 chips as core； 1st diaphragm pressure sensor 101, the 2nd diaphragm pressure sensor 102,32 roads for being incremented to the 32nd diaphragm pressure sensor 132 are defeated Go out, respectively with ADG732 pin 12,11 ..., 40 be connected, i.e., respectively with ADG732 ports S1, S2, be incremented to S32 and be connected； The ATmega128 pin 35,36,37,38,39 of ADG732 pin 15,16,17,18,19 respectively with signal transacting main control module 400 It is connected, ADG732 pin 43 are connected with AD8615 pin 3；R221And R222Termination AD8615 pin 4, the other end is grounded respectively, AD8615 pin 1, AD8615 pin 1 are connected with the ATmega128 pin 61 of signal transacting main control module 400；Diaphragm pressure sensor battle array Row module 100 exports 32 road pressure signals, the control of signal transacting main control module 400 ADG732, select from 32 road pressure signals 1, Output signal UD, UDU is exported after being nursed one's health through AD8615O=(1+R222/R221)×UD, the sampling processing of signal transacting main control module 400 The U of AD8615 outputsO。
As shown in Fig. 3 (a) -3 (e), guardrail state-detection and control module 300 include guardrail state detection circuit 310, shield Column control circuit 320；Guardrail state detection circuit 310 uses collision bead electrical contact sensor, guardrail " pulling on "/" falling " state When, collision bead and conductive locating piece contact/disengaging；Conductive locating piece ground connection, is half up-small and down-big round table-like body of aperture, with guardrail Fix bar circular arc side top be mounted flush against, collision bead electrical contact sensor is embedded in the elevating lever of guardrail, the just fix bar to guardrail Center of arc's point；Collision bead is interconnected by metal spring, all the way through R301Connect 5V, another road and signal transacting main control module 400 ATmega128 pin 25 are connected；Guardrail " pulls on " state, and collision bead is grounded through conductive locating piece, and 0V is exported to ATmega128 pin 25, guardrail " falls " state, and 5V is exported to ATmega128 pin 25；Protect column control circuit 320 and use IRFP150 type solid-state relays Device SSR401, electromagnet L401；SSR401Control port connect the ATmega128 pin 48, SSR of signal transacting main control module 400401's Two output ports are through power supply, L401It is connected；L401Release/locking of dead bolt, rises when logical/dead electricity correspondence elevating lever " falls " state Dead bolt locking when drop bar " falls " state can be transferred to release by the hand switch set up；Dead bolt and shield column control circuit 320 It is inlaid in fix bar, dead bolt hole is reserved on elevating lever；
The mechanical device of anti-fall guardrail includes the fix bar of guardrail, the elevating lever of guardrail, and elevating lever is the length of two ends circular arc Square hexahedron, the bottom of elevating lever is installed by compression spring, elastic force F >=elevating lever gravity+20N；Fix bar uses swallow with elevating lever Stern notch sliding pair coordinates, and planar wall dovetail slot lifting of the elevating lever along fix bar circular arc rectangular parallelepiped hole is slided, lifting carriage It is related to the flow path switch of two states of " pulling on "/" falling "；" falling " State Transferring is into " pulling on " state：Stir hand switch or L401It is powered, the dead bolt of locking elevating lever " falling ", which is retracted, to be discharged, and the compression spring of elevating lever bottom promotes elevating lever to slide up Dynamic, until collision bead is contacted with conduction locating piece, upper limit, be converted into " pulling on " state, " pulling on " State Transferring is into " falling " shape State：Artificial pressure elevating lever, dead bolt protrudes into dead bolt hole, locking elevating lever, lower limit, is converted into " falling " state.
Illustrate 2：In view of the systematicness of statement, has sketched the composition and workflow of anti-fall guardrail mechanical device.
As shown in figure 4, signal transacting main control module 400 is using ATmega128 chips as core, ATmega128 pin 51,50, 49 are connected with the MM1192 pin 1,5,6 of direct current carrier communication module 500 respectively；ATmega128 controls multichannel gating circuit 210,1 tunnel in 32 road pressure signals of the output of diaphragm pressure sensor array module 100 is gated, is gathered through scaling circuit 220 conditioning Hou Gai roads pressure signals；ATmega128 passes through guardrail state detection circuit 310, shield column control circuit 320, inspection Survey and control the state of guardrail.
Illustrate 3：ATmega128 is gated and scaling module 200, guardrail state-detection and control module with multichannel 300 connection, the statement with scaling module 200, guardrail state-detection and control module 300 is gated referring to multichannel, this Section is repeated no more.
As shown in Fig. 5 (a), Fig. 5 (b), direct current carrier communication module 500 is using MM1192 chips as core, MM1192 pin 6,1 Respectively through R2、R1Ground connection；C1Two ends are connected with MM1192 pin 3,4 respectively, and MM1192 pin 15,16 are respectively through R7And C6、R6And C5Connect Enter the negative, positive end of carrier wave output, MM1192 pin 11 and VCCAnd C2One end is connected, C2The other end is connected with MM1192 pin 13；D1With D2Series connection, D3And D4Series connection, D2And D4The other end is grounded, D1And D3The other end is connected with MM1192 pin 14,12 respectively；R3、R4's One end is connected with MM1192 pin 14,12 respectively, the other end respectively with MM1192 pin 9 and L1One end, pin 10 and L2One end is connected； L1、L2The other end simultaneously meets R3, respectively through C3、C4The positive and negative end of access carrier output；Signal transacting main control module 400 and nurse station Monitor terminal 600 constitutes direct current carrier Modbus networks, using RTU message frame formats：The byte of address 1, the byte of function code 1, number According to the time interval for accounting between 0~252 byte, the byte of CRC check 2, message frame >=3.5 characters；The first character section of message frame For address, address values scope is 0~255, and address 0 is broadcast address, and function code value is 1~255.
Illustrate 4：MM1192 and ATmega128 connection, referring to the statement of signal transacting main control module 400, this section is no longer Repeat.
As shown in Fig. 6 (a), Fig. 6 (b), Fig. 6 (c), medical bed for nursing care anti-drop method flow includes the initialization of anti-drop method Flow, the execution flow of anti-drop method；
Variable declaration
High-risk time zone high risk time interval, Time_HRI, Time_HRI ∈ [1,5]
High-risk patient high risk patient, Patient_HR, 1/0=Yes/No
High-risk time high risk time, Time_HR, 1/0=Yes/No
Guardrail state guardrail state, State_guardrail, 1/0=are pulled on/fallen
Fall time lower time, Time_lower
Fall time counter lower time counter, Time_LC
Fall value the lower time0value, Time0_LV=0min of time 0
Fall value the lower time1value, Time1_LV=5min of time 1
Fall value the lower time2value, Time2_LV=15min of time 2
Fall value the lower time3value, Time3_LV=30min of time 3
Fall value the lower time4value, Time4_LV=60min of time 4
The pressure of 1st diaphragm pressure sensor 101 is designated as P101, by that analogy to P132
Pressure matrix Press Matrix, MP []9×4, initialization MP []9×4=FFFF
MP [1,1]=MP [Isosorbide-5-Nitrae]=MP [2,1]=MP [2,4] ≡ FFFF, FFFF characterize unused
MP[]9×4Row 1,2/3,4 storage bed a left side, in it is to the left/in the right, right cell pressure
MP[]9×4Row 1,2/3,4,5/6,7/8,9 is the head/back of the body/seat/leg cell pressure of bed
MP [1,2]=P101, MP [1,3]=P102, MP [2,2]=P103, MP [2,3]=P104
MP [3,1]=P105, MP [3,2]=P106, MP [3,3]=P107, MP [3,4]=P108
……
MP [9,1]=P129, MP [9,2]=P130, MP [9,3]=P131, MP [9,4]=P132
Sensor pressure Press Column, PC []1×4,K=1,2,3,4
Bed middle part and the horizontal position criterion on right side
Criterion 1-- centers are sleeping：PC [3] ＞ PC [4] and PC [2] ＞ PC [4]
Criterion 2-- is to the right sleeping：PC [3] ＞ PC [4] and PC [2] ＜ PC [4]
It is sleeping on the right side of criterion 3--：PC [3] ＜ PC [4] and PC [2] ＜ PC [3]
Criterion 4-- is non-, and rule are sleeping：Outside above-mentioned 3 kinds of criterions, it is included into " to the right sleeping "
Producing condition classification explanation
Operating mode 0--Patient_HR=1, Time_HR=1, right side are crouched, Time_lower=Time0_LV
Operating mode 11--Patient_HR=1, Time_HR=1, to the right sleeping, Time_lower=Time1_LV
Operating mode 12--Patient_HR=1, Time_HR=0, right side are crouched, Time_lower=Time1_LV
Operating mode 13--Patient_HR=0, Time_HR=1, right side are crouched, Time_lower=Time1_LV
Operating mode 21--Patient_HR=1, Time_HR=1, center are sleeping, Time_lower=Time2_LV
Operating mode 22--Patient_HR=1, Time_HR=0, to the right sleeping, Time_lower=Time2_LV
Operating mode 23--Patient_HR=0, Time_HR=1, to the right sleeping, Time_lower=Time2_LV
Operating mode 24--Patient_HR=0, Time_HR=0, right side are crouched, Time_lower=Time2_LV
Operating mode 31--Patient_HR=1, Time_HR=0, center are sleeping, Time_lower=Time3_LV
Operating mode 32--Patient_HR=0, Time_HR=1, center are sleeping, Time_lower=Time3_LV
Operating mode 33--Patient_HR=0, Time_HR=0, to the right sleeping, Time_lower=Time3_LV
Operating mode 4--Patient_HR=0, Time_HR=0, center are sleeping, Time_lower=Time4_LV
The initialization flow of anti-drop method
By doctor's advice Patient_HR=1/0, MP []9×4=FFFF
Time_HR=1, Time_HRI ∈ [1,5]
State_guardrail=Time_LC=Time_lower=0
Time0_LV=0, Time1_LV=5, Time2_LV=15
Time3_LV=30, Time4_LV=60
The execution flow of anti-drop method
1st, read time, reference Time_HRI, Time_HR=1 or 0
2nd, collection collision bead electrical contact sensor voltage, State_guardrail=1 or 0
3rd, the 1st~32 diaphragm pressure sensor pressure P101~P132 is read
Assignment pressure matrix MP []9×4=P101~P132
4th, row pressure PC [] is calculated1×4, based on criterion 1~4, obtain horizontal position；
5th, according to Patient_HR, Time_HR, horizontal position, Time_lower is obtained
6th, 6-1State_guardrail=1, then Time_LC=0, is returned " 1 "；
6-2State_guardrail=0, Time_LC timing,
If Time_LC ＜ Time_lower, are returned " 1 "；
Otherwise signal transacting main control module 400 performs elevating lever " pulling on " operation
Alarm, Time_LC=0, are returned " 1 ".
Illustrate 5：A characteristic of stock is not lost, and in the middle part of the horizontal position criterion in the middle part of bed and right side, bed and left side is only discussed herein Horizontal position criterion is similar；Statistics shows that sitting posture and the pendant bed probability of oblique prostration are comparatively minimum, therefore include common prostration Position category processing.The constraint limb activity free degree can effectively reduce Zhui Chuan Shi therefore rate, but sickbed patients repel the pact of the free degree Beam；Therefore, it is necessary to take into account the demand of both sides, both equalization points are found.If diaphragm pressure sensor increases to 128；Such as Fruit acquires the diaphragm pressure sensor output under different sexes, different heights, different sleeping positions and sitting posture, different horizontal positions Pressure data, and set up sample database；Then anti-drop system collection diaphragm pressure sensor data, call sample database, base In the principle of similitude, can high-efficiency high-accuracy obtain sickbed patients sleeping position and position.

Claims (6)

1. a kind of medical bed for nursing care anti-drop system, it is characterised in that system is by diaphragm pressure sensor array module (100), many Passage is gated and scaling module (200), guardrail state-detection and control module (300), signal transacting main control module (400), direct current carrier communication module (500), nurse station monitor terminal (600) composition；Medical bed for nursing care number=N >=1, medical shield Manage bed anti-drop system to correspond with medical bed for nursing care, nurse station monitor terminal (600) counts ≡ 1；Diaphragm pressure sensor array Module (100) is connected through multichannel gating and scaling module (200), with signal transacting main control module (400), guardrail state Detection and control module (300), it is connected with signal transacting main control module (400), signal transacting main control module (400) is carried through direct current Wave communication module (500) is connected with nurse station monitor terminal (600)；Signal transacting main control module (400) is monitored eventually with nurse station Hold (600) networking, it then follows Modbus--RTU agreements, nurse station monitor terminal (600) is main frame, signal transacting main control module (400) it is slave；
Diaphragm pressure sensor array module (100) includes the 1st diaphragm pressure sensor (101), the 2nd diaphragm pressure sensor (102) the 32nd diaphragm pressure sensor (132), is incremented to, totally 32；32 diaphragm pressure sensor axial symmetry, the head/back of the body/ Seat/leg is configured in length × wide=1960mm × 900mm rectangles, and head, back, portions, leg are respectively configured 4,12,8,8 Diaphragm pressure sensor；The midpoint for making rectangle top is the seat of 16 diaphragm pressure sensors on the right side of coordinate origin, rectangle Mark is as follows：
Sensor sequence number X-coordinate (mm) Y-coordinate (mm) Sensor sequence number X-coordinate (mm) Y-coordinate (mm) 102 50 80 104 50 160 107 100 300 108 200 300 111 100 550 112 200 550 115 100 800 116 200 800 119 100 900 120 200 900 123 100 1000 124 200 1000 127 150 1250 128 300 1250 131 150 1500 132 300 1500
2. medical bed for nursing care anti-drop system according to claim 1, it is characterised in that described multichannel gating and ratio Amplification module (200) include multichannel gating circuit (210), scaling circuit (220), multichannel gating circuit (210) with ADG732 chips are core, scaling circuit (220) using AD8615 chips as core；1st diaphragm pressure sensor (101), 2nd diaphragm pressure sensor (102), the 32 tunnels output for being incremented to the 32nd diaphragm pressure sensor (132), respectively with ADG732 pin 12nd, 11 ... 40 are connected, i.e., respectively with ADG732 ports S1, S2, be incremented to S32 and be connected；ADG732 pin 15,16,17,18,19 points It is not connected with the ATmega128 pin 35,36,37,38,39 of signal transacting main control module (400), ADG732 pin 43 and AD8615 pin 3 are connected；R221And R222Termination AD8615 pin 4, the other end is grounded respectively, AD8615 pin 1, AD8615 pin 1 and signal transacting The ATmega128 pin 61 of main control module (400) are connected；Diaphragm pressure sensor array module (100) exports 32 road pressure signals, Signal transacting main control module (400) controls ADG732, selects 1, output signal U from 32 road pressure signalsD, UDNursed one's health through AD8615 Export UO=(1+R222/R221)×UD, the U of signal transacting main control module (400) sampling processing AD8615 outputsO。
3. medical bed for nursing care anti-drop system according to claim 1, it is characterised in that described guardrail state-detection and control Molding block (300) includes guardrail state detection circuit (310), shield column control circuit (320)；Guardrail state detection circuit (310) Using collision bead electrical contact sensor, during guardrail " pulling on "/" falling " state, collision bead and conductive locating piece contact/disengaging；Electric-conduction Position block ground connection, is half up-small and down-big round table-like body of aperture, is mounted flush against with the fix bar circular arc side top of guardrail, collision bead electricity is touched Point sensor is embedded in the elevating lever of guardrail, just the fix bar center of arc point to guardrail；Collision bead is interconnected by metal spring, all the way Through R3015V is met, another road is connected with the ATmega128 pin 25 of signal transacting main control module (400)；Guardrail " pulls on " state, touches Pearl is grounded through conductive locating piece, and 0V is exported to ATmega128 pin 25, and guardrail " falls " state, and 5V is exported to ATmega128 pin 25；Column control circuit (320) is protected using IRFP150 type solid-state relays SSR401, electromagnet L401；SSR401Control port connect The ATmega128 pin 48, SSR of signal transacting main control module (400)401Two output ports through power supply, L401It is connected；L401Logical/ Release/locking of dead electricity correspondence elevating lever dead bolt when " falling " state, dead bolt locking when elevating lever " falls " state can be by The hand switch set up is transferred to release；Dead bolt and shield column control circuit (320) are inlaid in fix bar, and dead bolt is reserved on elevating lever Hole；
The mechanical device of anti-fall guardrail includes the fix bar of guardrail, the elevating lever of guardrail, and elevating lever is rectangular the six of two ends circular arc Face body, the bottom of elevating lever is installed by compression spring, elastic force F >=elevating lever gravity+20N；Fix bar uses dovetail groove with elevating lever Sliding pair coordinates, and planar wall dovetail slot lifting of the elevating lever along fix bar circular arc rectangular parallelepiped hole is slided, and lifting carriage is related to The flow path switch of two states of " pulling on "/" falling "；" falling " State Transferring is into " pulling on " state：Stir hand switch or L401 It is powered, the dead bolt of locking elevating lever " falling ", which is retracted, discharges elevating lever, and the compression spring of elevating lever bottom promotes elevating lever upward Slide, until collision bead is contacted with conduction locating piece, upper limit, be converted into " pulling on " state, " pulling on " State Transferring is into " falling " State：Artificial pressure elevating lever, dead bolt protrudes into dead bolt hole, locking elevating lever, lower limit, is converted into " falling " state.
4. medical bed for nursing care anti-drop system according to claim 3, it is characterised in that described signal transacting main control module (400) using ATmega128 chips as core, ATmega128 pin 51,50,49 respectively with direct current carrier communication module (500) MM1192 pin 1,5,6 are connected；ATmega128 control multichannel gating circuits (210), gate diaphragm pressure sensor array module (100) 1 tunnel in 32 road pressure signals of output, collection nurses one's health Hou Gai roads pressure signal through scaling circuit (220)； ATmega128 detects and controlled the state of guardrail by guardrail state detection circuit (310), shield column control circuit (320).
5. medical bed for nursing care anti-drop system according to claim 4, it is characterised in that described direct current carrier communication module (500) using MM1192 chips as core；MM1192 pin 6,1 are respectively through R2、R1Ground connection, C1Two ends respectively with MM1192 pin 3,4 phases Even；MM1192 pin 15,16 are respectively through R7And C6、R6And C5The negative, positive end of access carrier output, MM1192 pin 11 and VCCAnd C2One End is connected, C2The other end is connected with MM1192 pin 13；D1And D2Series connection, D3And D4Series connection, D2And D4The other end is grounded, D1And D3Separately One end is connected with MM1192 pin 14,12 respectively；R3、R4One end be connected respectively with MM1192 pin 14,12, the other end respectively with MM1192 pin 9 and L1One end, pin 10 and L2One end is connected；L1、L2The other end simultaneously meets R3, respectively through C3、C4Access carrier output Positive and negative end；Signal transacting main control module (400) constitutes direct current carrier Modbus networks with nurse station monitor terminal (600), uses RTU message frame formats：The byte of address 1, the byte of function code 1, data are accounted between 0~252 byte, the byte of CRC check 2, message frame The time interval of >=3.5 characters；The first character section of message frame is address, and address values scope is 0~255, and address 0 is broadcast Address, function code value is 1~255.
6. a kind of anti-drop method using medical bed for nursing care anti-drop system as claimed in claim 1, it is characterised in that：Method flow Initialization flow including anti-drop method, the execution flow of anti-drop method；
Variable declaration
High-risk time interval high risk time interval, Time_HRI, Time_HRI ∈ [1,5]；
High-risk patient high risk patient, Patient_HR, 1/0=Yes/No；
High-risk time high risk time, Time_HR, 1/0=Yes/No；
Guardrail state guardrail state, State_guardrail, 1/0=are pulled on/fallen；
Fall time lower time, Time_lower；
Fall time counter lower time counter, Time_LC；
Fall value lower the time0 value, Time0_LV=0min of time 0；
Fall value lower the time1 value, Time1_LV=5min of time 1；
Fall value lower the time2 value, Time2_LV=15min of time 2；
Fall value lower the time3 value, Time3_LV=30min of time 3；
Fall value lower the time4 value, Time4_LV=60min of time 4；
The pressure of 1st diaphragm pressure sensor (101) is designated as P101, by that analogy to P132；
Pressure matrix Press Matrix, MP []9×4, initialization MP []9×4=FFFF
MP [1,1]=MP [Isosorbide-5-Nitrae]=MP [2,1]=MP [2,4] ≡ FFFF, FFFF characterize unused；
MP[]9×4Row 1,2/3,4 storage bed a left side, in it is to the left/in the right, right cell pressure；
MP[]9×4Row 1,2/3,4,5/6,7/8,9 is the head/back of the body/seat/leg cell pressure of bed；
MP [1,2]=P101, MP [1,3]=P102, MP [2,2]=P103, MP [2,3]=P104
MP [3,1]=P105, MP [3,2]=P106, MP [3,3]=P107, MP [3,4]=P108
……
MP [9,1]=P129, MP [9,2]=P130, MP [9,3]=P131, MP [9,4]=P132
Sensor pressure Press Column,Bed middle part With the horizontal position criterion on right side：
Criterion 1-- centers are sleeping：PC [3] ＞ PC [4] andPC [2] ＞ PC [4]；
Criterion 2-- is to the right sleeping：PC [3] ＞ PC [4] andPC [2] ＜ PC [4]；
It is sleeping on the right side of criterion 3--：PC [3] ＜ PC [4] andPC [2] ＜ PC [3]；
Criterion 4-- is non-, and rule are sleeping：Outside above-mentioned 3 kinds of criterions, it is included into " to the right sleeping "；
Producing condition classification explanation
Operating mode 0--Patient_HR=1, Time_HR=1, right side are crouched, Time_lower=Time0_LV；
Operating mode 11--Patient_HR=1, Time_HR=1, to the right sleeping, Time_lower=Time1_LV；
Operating mode 12--Patient_HR=1, Time_HR=0, right side are crouched, Time_lower=Time1_LV；
Operating mode 13--Patient_HR=0, Time_HR=1, right side are crouched, Time_lower=Time1_LV；
Operating mode 21--Patient_HR=1, Time_HR=1, center are sleeping, Time_lower=Time2_LV；
Operating mode 22--Patient_HR=1, Time_HR=0, to the right sleeping, Time_lower=Time2_LV；
Operating mode 23--Patient_HR=0, Time_HR=1, to the right sleeping, Time_lower=Time2_LV；
Operating mode 24--Patient_HR=0, Time_HR=0, right side are crouched, Time_lower=Time2_LV；
Operating mode 31--Patient_HR=1, Time_HR=0, center are sleeping, Time_lower=Time3_LV；
Operating mode 32--Patient_HR=0, Time_HR=1, center are sleeping, Time_lower=Time3_LV；
Operating mode 33--Patient_HR=0, Time_HR=0, to the right sleeping, Time_lower=Time3_LV；
Operating mode 4--Patient_HR=0, Time_HR=0, center are sleeping, Time_lower=Time4_LV；At the beginning of anti-drop method Beginningization flow
By doctor's advice Patient_HR=1/0, MP []9×4=FFFF
Time_HR=1, Time_HRI ∈ [1,5]
State_guardrail=Time_LC=Time_lower=0
Time0_LV=0, Time1_LV=5, Time2_LV=15
Time3_LV=30, Time4_LV=60
The execution flow of anti-drop method
1st, read time, reference Time_HRI, Time_HR=1 or 0；
2nd, collection collision bead electrical contact sensor voltage, State_guardrail=1 or 0；
3rd, the 1st~32 diaphragm pressure sensor pressure P101~P132 is read
Assignment pressure matrix MP []9×4=P101~P132；
4th, row pressure PC [] is calculated1×4, based on criterion 1~4, obtain horizontal position；
5th, according to Patient_HR, Time_HR, horizontal position, Time_lower is obtained；
6th, 6-1State_guardrail=1, then Time_LC=0, is returned " 1 "；
6-2State_guardrail=0, Time_LC timing,
If Time_LC ＜ Time_lower, are returned " 1 "；
Otherwise signal transacting main control module（400）Perform elevating lever " pulling on " operation
Alarm, Time_LC=0, are returned " 1 ".
CN201710515619.XA 2017-06-29 2017-06-29 Medical bed for nursing care anti-drop system and method Pending CN107174428A (en)

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CN110368225A (en) * 2018-04-12 2019-10-25 廖志琳 Convenient for adjusting the hospital bed guardrail equipment of height
CN113041059A (en) * 2021-03-03 2021-06-29 上海理工大学 Intelligent nursing mattress and alarm control method
CN113476230A (en) * 2021-08-13 2021-10-08 河北万瑞医疗器械有限公司 Three-column ICU (intensive care unit) intensive care bed and rollover system

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