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CN108335742A - A kind of aseptic Medical hospital bed control system Internet-based - Google Patents

A kind of aseptic Medical hospital bed control system Internet-based Download PDF

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CN108335742A
CN108335742A CN201711192354.0A CN201711192354A CN108335742A CN 108335742 A CN108335742 A CN 108335742A CN 201711192354 A CN201711192354 A CN 201711192354A CN 108335742 A CN108335742 A CN 108335742A
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positioning
node
distance
power
microcontroller
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颜振刚
赵庆利
王洪飞
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/50—Image enhancement or restoration using two or more images, e.g. averaging or subtraction
    • 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
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J7/00—Devices for administering medicines orally, e.g. spoons; Pill counting devices; Arrangements for time indication or reminder for taking medicine
    • A61J7/04—Arrangements for time indication or reminder for taking medicine, e.g. programmed dispensers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • 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
    • A61G2203/12—Remote controls
    • 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
    • A61G2203/16—Touchpads
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20212—Image combination
    • G06T2207/20221—Image fusion; Image merging

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  • Medical Informatics (AREA)
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  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The invention belongs to ward management technical fields, disclose a kind of aseptic Medical hospital bed control system Internet-based, are provided with the microcontroller for carrying out data operation and processing；It is connected with microcontroller, for realizing the power supply module of supply of electric power；It is connected with microcontroller, the lifting module adjusted for realizing sick bed height；It is connected with microcontroller, for realizing the rescue module sought help to nurse station；It is connected with microcontroller, the buzzer reminded for realizing drug administration；It is connected with microcontroller, the gate inhibition's module opened for realizing ward door；It is connected with microcontroller, for sending out instruction, the touch screen of control single chip computer operation to microcontroller.Microcontroller is controlled by touch screen, instruction is sent out to microcontroller, realizes the function of lifting, relief, alarm respectively as needed, user can remote control ward situation, the people into ward is checked, outer infections are prevented, the consideration that patient can not be looked after yet at one's side.

Description

Internet-based hospital bed control system for medical department and capable of preventing infection
Technical Field
The invention belongs to the technical field of ward management, and particularly relates to an anti-infection hospital bed control system for a medical department based on the internet.
Background
At present, with the rapid development of the world economy, the field of electronic video transmission has also made great progress, and the combination of the interactive transmission and the control field becomes the current hot. In the medical care field, the technology can be well utilized. When family and concerned people stay in hospital, if relatives are accompanied by other things, they cannot attend the hospital all the time.
In summary, the problems of the prior art are as follows: when family members and concerned people are in hospital, if relatives sometimes can not accompany the hospital all the time due to other affairs.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an anti-infection medical sickbed control system based on the Internet.
The invention is realized in such a way that the Internet-based infection-preventing hospital bed control system for the internal medicine is provided with a singlechip for data operation and processing;
the power supply module is connected with the singlechip and used for realizing power supply;
the lifting module is connected with the singlechip and used for realizing height adjustment of the sickbed;
the rescue module is connected with the singlechip and used for seeking help to the nurse station;
the help module wireless positioning method specifically comprises the following steps:
the coordinate of the anchor node in the communication range of the node O to be positioned is Ai(xi，yi) Wherein i is 0,1, …, n (n is more than or equal to 4);
the method comprises the following steps: sampling a received signal r (t) by a node to be positioned to obtain a sampling signal r (N), wherein N is 0,1, …, N-1, N represents the number of subcarriers contained in an OFDM symbol, and simultaneously recording a sending node of the received signal as Ai(xi,yi)；
Step two: and calculating a cross-correlation value E according to the sampling signal r (n):
step three: according to the logarithmic distance path loss model, the node to be positioned and the anchor node A are calculated according to the following formulaiThe distance between:
Pr(d′i)＝Pr(d0)-10·γlg(d′i)+Xσ；
wherein, Pr (d'i) Representing distance d 'from transmitting end'iTime-derived cross-correlation value, Pr (d)0) Indicating distance from sender d0The cross-correlation value obtained at 1 meter, γ represents the path loss factor, lg (·) represents a logarithmic operation with a base of 10, XσObeying a Gaussian distribution with a mean value of 0 and a standard deviation of sigma;
the distances d between each anchor node and the node O to be positioned are calculated by the formulai' the coordinates of the corresponding anchor nodes are A respectivelyi(xi,yi) Where i is 0,1,2, …, n;
step four: estimating the coordinates O (x, y) of the node to be positioned according to a self-adaptive distance correction algorithm;
the specific method of the second step comprises the following steps:
firstly, constructing a correlation window consisting of continuous sampling sequences with the length of l at the same sampling position in m continuous OFDM symbols, and then expressing a log-likelihood function Λ (τ) corresponding to the correlation window as follows:
where the argument τ denotes a correlation window start point, and m denotes the number of consecutive OFDM symbols.
And secondly, sliding the correlation window by the length of N + L sampling points to obtain the maximum value of the log-likelihood function Lambda (tau), wherein the sampling time corresponding to the maximum value is the initial position of the OFDM symbol
Wherein,representing the value of an independent variable tau when the function obtains the maximum value, representing a log-likelihood function by Λ (tau), representing the number of continuous OFDM symbols by m, representing the length of continuous sampling sequences at the same sampling position by L, representing a sampling signal by r (N), representing the number of subcarriers contained in the OFDM symbols by N, representing the number of sampling points of a cyclic prefix part in the OFDM symbols by L, and being a modulo operator by L;
thirdly, according to the starting position of the OFDM symbolCalculating a cross-correlation value E:
the fourth step specifically comprises:
firstly, selecting a differential correction point, determining a coordinate of a positioning intersection point and a plurality of positioning intersection points, and calculating the distance between the positioning intersection points;
from di' (i is 0,1,2, …, n) selecting anchor node A with minimum distance value0For the difference correction point, the 3 smallest distance values are extracted from the remaining distance values, assuming that these 3 are distance values d'1、d′2And d'3The coordinates of the corresponding anchor nodes are respectively A1(x1,y1)、A2(x2,y2) And A3(x3,y3) Respectively with anchor nodes Ai(xi,yi) As a center of a circle, diThe method comprises the following steps that' three positioning circles i are made of radii, wherein i is 1,2 and 3, 6 intersection situations of the three positioning circles exist, two intersection points exist between the two circles, and the two intersection points are two equal real intersection points or two unequal real intersection points or two complex intersection points; selecting one intersection point with a smaller distance from the center coordinates of the third positioning circle from two intersection points of the two positioning circles as a positioning intersection point to participate in positioning of the node to be positioned; the three positioning intersections and the number m ' of the plurality of positioning intersections are determined by the 3 positioning circles, and the coordinates of the positioning intersections determined by the positioning circles 2 and 3 are A ' (x '1,y′1) And the coordinates of the positioning intersection points determined from positioning circle 1 and positioning circle 3 are B '(x'2,y′2) The coordinates of the positioning intersection determined by the positioning circle 1 and the positioning circle 2 are C '(x'3,y′3) The distances between the positioning intersection points A 'and B', B 'and C', A 'and C' are d12、d23、d13：
Secondly, setting a threshold T, an individual difference coefficient correction coefficient omega and a parameter lambda (lambda > 0);
thirdly, according to the distances d between the three positioning intersection points12、d23And d13Judging whether d 'is needed'1、d′2、d′3Make a correction if d12<T、d23<T、d13<T, then do not need to be d'1、d′2、d′3Correcting, executing the fifth step, otherwise, d 'needs to be corrected'1、d′2、d′3Correcting and executing the fourth step;
fourthly, adjusting direction correction factors lambda of three measuring distances1、λ2And λ3D 'is corrected according to the following adaptive distance correction formula'1、d′2、d′3Obtaining a corrected distance d1、d2、d3：
Wherein d isiRepresenting the node to be positioned and the anchor node AiCorrected distance between d0iRepresenting a differential correction point A0And anchor node AiActual distance between, d'0iRepresenting a differential correction point A0And anchor node AiA measured distance therebetween, ω represents an individual difference coefficient correction coefficient, λiRepresents the directional correction factor, exp (-) represents the exponential function;
according to the corrected distance d1、d2、d3Re-solving the distance d between the three corrected positioning intersections12、 d23、d13Returning to the third step;
fifthly, calculating the positioning coordinate O (x) of the node to be positioned according to the following formula0,y0)：
Wherein, α1、α2、α3Respectively represent x'1、x′2、x′3β weight of1、β2、β3Are respectively y'1、y′2、y′3The weight of (c);
the buzzer is connected with the singlechip and used for realizing medicine taking reminding;
the entrance guard module is connected with the singlechip and used for opening a ward door;
the touch screen is connected with the singlechip and used for sending instructions to the singlechip and controlling the singlechip to operate;
the image fusion method of the touch screen comprises the following specific steps:
1) applying a sliding window technique to a source image XA,XBIn the above, the two images are respectively changed intoA size ofImage of (2)Blocking, and then changing the divided image blocks into an n-dimensional column vector form;
2) for i image block of source image j (j ═ A, B)First subtract their mean valueObtaining the image block after the average value is subtractedThen obtaining a common sparse coefficient by solving the formulaAnd two different sparse coefficients
3) Substituting the obtained sparse coefficients into formulaObtaining the fused coefficients
4) By passingObtaining a fused image XFI image block of
5) Using transformation methods to obtainBecome of sizeThe image block of (1); obtaining a fused image X by weighted averagingF；
The method for eliminating the bottleneck effect of the single-chip microcomputer MIMO-CCRN comprises the following steps:
step one, the set of relays to be selected is made asSelecting relay nodes
Step two, calculating the signal-to-noise ratio of the link formed by the PT and each relay node rAnd obtain
Step three, calculating a candidate set of relay nodesSignal-to-noise ratio of link with PRWherein
Step four, comparingAndthe size of (d);
step five, ifSelecting a single relay r that achieves maximum end-to-end spectral efficiencyopt(ii) a In the first phase, the transmitting end PT of the user is authorized to powerBroadcast message spCognitive user ST1With powerTo SR1Transmitting data s1(ii) a If the selected relay node is SR1，SR1Respectively recover spAnd s1(ii) a If the selected relay node is ST2，ST2To spReception, SR1To s1Receiving; in the second stage, roptWith powerForwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，roptTransmission power to assist primary user data transmissionThe calculation is as follows,
step six, ifSelecting two relay SRs1And ST2(ii) a In the first phase, the user transmitting terminal PT is authorized to send powerBroadcasting messages s to cognitive userspCognitive user ST1With powerTo SR1Transmitting data s1，ST2Recovery spAnd eliminate the signal from ST1Interference of (2), SR1Respectively recover spAnd s1，SR2To spReceiving; in the second stage, SR1And ST2Respectively with powerAndforwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，SR2Need to eliminate the signal from SR1And ST2Interference of (ST)2Designing a transmission mode to transmit s2No interference is generated to PR; SR1And ST2Total power to assist primary user data transmissionThe calculation is as follows:
each relay has a power for granting data transmission of
Further, a solar cell panel is installed at the power end of the power supply module, and the solar cell panel is electrically connected with the power supply module.
Furthermore, an angle scale is arranged on the hospital bed, and a fluorescent layer is stuck on the surface of the angle scale.
Furthermore, the outer side of the touch screen is wrapped with a waterproof film.
The invention has the advantages and positive effects that: the touch screen is used for controlling the single chip microcomputer, sending instructions to the single chip microcomputer, and realizing the functions of lifting, rescuing and alarming respectively according to needs, so that a user can remotely control the state of a ward, examine people entering the ward, prevent external infection, and attach the body of a patient for care without being at the side.
Drawings
Fig. 1 is a schematic diagram of an internet-based infection-prevention medical bed control system according to an embodiment of the present invention.
In the figure: 1. a single chip microcomputer; 2. a power supply module; 3. a lifting module; 4. a rescue module; 5. a buzzer; 6. An access control module; 7. a touch screen.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail with reference to fig. 1.
The Internet-based infection-preventing hospital bed control system for the internal medicine is provided with a singlechip 1 for data operation and processing;
a power supply module 2 connected with the singlechip 1 and used for realizing power supply;
the lifting module 3 is connected with the singlechip 1 and is used for realizing height adjustment of the sickbed;
a rescue module 4 connected with the singlechip 1 and used for realizing help seeking to a nurse station;
the buzzer 5 is connected with the singlechip 1 and is used for reminding taking medicines;
the entrance guard module 6 is connected with the singlechip 1 and used for opening a sick house door;
and the touch screen 7 is connected with the singlechip 1 and used for sending instructions to the singlechip 1 and controlling the singlechip 1 to operate.
As a preferred embodiment of the present invention, a solar panel is installed at a power end of the power supply module 2, and the solar panel is electrically connected to the power supply module 2.
As a preferred embodiment of the invention, the hospital bed is provided with an angle scale, and a fluorescent layer is stuck on the surface of the angle scale.
In a preferred embodiment of the present invention, the touch screen 7 is wrapped with a waterproof film.
The method for eliminating the bottleneck effect of the single-chip microcomputer MIMO-CCRN comprises the following steps:
step one, the set of relays to be selected is made asSelecting relay nodes
Step two, calculating the signal-to-noise ratio of the link formed by the PT and each relay node rAnd obtain
Step three, calculating a candidate set of relay nodesSignal-to-noise ratio of link with PRWherein
Step four, comparingAndthe size of (d);
step five, ifSelecting a single relay r that achieves maximum end-to-end spectral efficiencyopt(ii) a In the first phase, the transmitting end PT of the user is authorized to powerBroadcast message spCognitive user ST1With powerTo SR1Transmitting data s1(ii) a If the selected relay node is SR1，SR1Respectively recover spAnd s1(ii) a If the selected relay node is ST2，ST2To spReception, SR1To s1Receiving; in the second stage, roptWith powerForwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，roptTransmission power to assist primary user data transmissionThe calculation is as follows,
step six, ifSelecting two relay SRs1And ST2(ii) a In the first phase, the user transmitting terminal PT is authorized to send powerBroadcasting messages s to cognitive userspCognitive user ST1With powerTo SR1Transmitting data s1，ST2Recovery spAnd eliminate the signal from ST1Interference of (2), SR1Respectively recover spAnd s1，SR2To spReceiving; in the second stage, SR1And ST2Respectively with powerAndforwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，SR2Need to eliminate the signal from SR1And ST2Interference of (ST)2Designing a transmission mode to transmit s2No interference is generated to PR; SR1And ST2Total power to assist primary user data transmissionThe calculation is as follows:
each relay has a power for granting data transmission of
The help module wireless positioning method specifically comprises the following steps:
the coordinate of the anchor node in the communication range of the node O to be positioned is Ai(xi，yi) Wherein i is 0,1, …, n (n is more than or equal to 4);
the method comprises the following steps: sampling a received signal r (t) by a node to be positioned to obtain a sampling signal r (N), wherein N is 0,1, …, N-1, N represents the number of subcarriers contained in an OFDM symbol, and simultaneously recording a sending node of the received signal as Ai(xi,yi)；
Step two: and calculating a cross-correlation value E according to the sampling signal r (n):
step three: according to the logarithmic distance path loss model, the node to be positioned and the anchor node A are calculated according to the following formulaiThe distance between:
Pr(d′i)＝Pr(d0)-10·γlg(d′i)+Xσ；
wherein, Pr (d'i) Representing distance d 'from transmitting end'iTime-derived cross-correlation value, Pr (d)0) Indicating distance from sender d0The cross-correlation value obtained at 1 meter, γ represents the path loss factor, lg (·) represents a logarithmic operation with a base of 10, XσObeying a Gaussian distribution with a mean value of 0 and a standard deviation of sigma;
calculating the distances d 'between each anchor node and the node O to be positioned by utilizing the formula'iThe coordinates of the corresponding anchor nodes are respectively Ai(xi,yi) Where i is 0,1,2, …, n;
step four: estimating the coordinates O (x, y) of the node to be positioned according to a self-adaptive distance correction algorithm;
the specific method of the second step comprises the following steps:
firstly, constructing a correlation window consisting of continuous sampling sequences with the length of l at the same sampling position in m continuous OFDM symbols, and then expressing a log-likelihood function Λ (τ) corresponding to the correlation window as follows:
where the argument τ denotes a correlation window start point, and m denotes the number of consecutive OFDM symbols.
And secondly, sliding the correlation window by the length of N + L sampling points to obtain the maximum value of the log-likelihood function Lambda (tau), wherein the sampling time corresponding to the maximum value is the initial position of the OFDM symbol
Wherein,representing the value of an independent variable tau when the function obtains the maximum value, representing a log-likelihood function by Λ (tau), representing the number of continuous OFDM symbols by m, representing the length of continuous sampling sequences at the same sampling position by L, representing a sampling signal by r (N), representing the number of subcarriers contained in the OFDM symbols by N, representing the number of sampling points of a cyclic prefix part in the OFDM symbols by L, and being a modulo operator by L;
thirdly, according to the starting position of the OFDM symbolCalculating a cross-correlation value E:
the fourth step specifically comprises:
firstly, selecting a differential correction point, determining a coordinate of a positioning intersection point and a plurality of positioning intersection points, and calculating the distance between the positioning intersection points;
from d'i(i-0, 1,2, …, n) selecting the anchor node A with the smallest distance value0For the difference correction point, the 3 smallest distance values are extracted from the remaining distance values, assuming that these 3 are distance values d'1、d′2And d3The coordinates of the corresponding anchor nodes are respectively A1(x1,y1)、A2(x2,y2) And A3(x3,y3) Respectively with anchor nodes Ai(xi,yi) Is the center of a circle, d'iThree positioning circles i are set for the radius, wherein i is 1,2 and 3, the intersection conditions of the three positioning circles are 6 in total, two intersection points exist between the two circles, and the two intersection points are two equal real number intersection pointsOr two non-equal real number intersections, or two complex number intersections; selecting one intersection point with a smaller distance from the center coordinates of the third positioning circle from two intersection points of the two positioning circles as a positioning intersection point to participate in positioning of the node to be positioned; the three positioning intersections and the number m ' of the plurality of positioning intersections are determined by the 3 positioning circles, and the coordinates of the positioning intersections determined by the positioning circles 2 and 3 are A ' (x '1,y′1) And the coordinates of the positioning intersection points determined from positioning circle 1 and positioning circle 3 are B '(x'2,y′2) The coordinates of the positioning intersection determined by the positioning circle 1 and the positioning circle 2 are C '(x'3,y′3) The distances between the positioning intersection points A 'and B', B 'and C', A 'and C' are d12、d23、d13：
Secondly, setting a threshold T, an individual difference coefficient correction coefficient omega and a parameter lambda (lambda > 0);
thirdly, according to the distances d between the three positioning intersection points12、d23And d13Judging whether d 'is needed'1、d′2、d′3Make a correction if d12<T、d23<T、d13<T, then do not need to be d'1、d′2、d′3Correcting, executing the fifth step, otherwise, d 'needs to be corrected'1、d′2、d′3Correcting and executing the fourth step;
the fourth step, adjust threeDirection correction factor lambda of individual measured distances1、λ2And λ3D 'is corrected according to the following adaptive distance correction formula'1、d′2、d′3Obtaining a corrected distance d1、d2、d3：
Wherein d isiRepresenting the node to be positioned and the anchor node AiCorrected distance between d0iRepresenting a differential correction point A0And anchor node AiActual distance between, d'0iRepresenting a differential correction point A0And anchor node AiA measured distance therebetween, ω represents an individual difference coefficient correction coefficient, λiRepresents the directional correction factor, exp (-) represents the exponential function;
according to the corrected distance d1、d2、d3Re-solving the distance d between the three corrected positioning intersections12、 d23、d13Returning to the third step;
fifthly, calculating the positioning coordinate O (x) of the node to be positioned according to the following formula0,y0)：
Wherein, α1、α2、α3Respectively represent x'1、x′2、x′3β weight of1、β2、β3Are respectively y'1、y′2、 y′3The weight of (c);
the image fusion method of the touch screen comprises the following specific steps:
1) applying a sliding window technique to a source image XA,XBIn the above, the two images are respectively changed intoA size ofThen the divided image blocks are changed into an n-dimensional column vector form;
2) for i image block of source image j (j ═ A, B)First subtract their mean valueObtaining the image block after the average value is subtractedThen obtaining a common sparse coefficient by solving the formulaAnd two different sparse coefficients
3) Substituting the obtained sparse coefficients into formulaObtaining the fused coefficients
4) By passingObtaining a fused image XFI image block of
5) Using transformation methods to obtainBecome of sizeThe image block of (1); obtaining a fused image X by weighted averagingF；
The working principle of the invention is as follows: solar cell panel converts solar energy into the electric energy, for power module 2 provides power supply, power module 2 supplies power for singlechip 1(STM32F103C8T 6). The single chip microcomputer 1 is controlled through the touch screen 7(ATMEGA32U4), instructions are sent to the single chip microcomputer 1, the functions of lifting, rescue and alarming are respectively realized according to needs, a user can remotely control the state of a ward, examine people entering the ward, prevent external infection, and can be attached to a body which can be used for caring patients when the user is not at hand. The adjustment of the sickbed angle is realized through the lifting module 3, so that the comfort is improved; the buzzer 5 is used for timing, so that the reminding of the medication time is realized.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (4)

1. An infection-preventing medical sickbed control system based on the internet is characterized in that the infection-preventing medical sickbed control system based on the internet is provided with a singlechip for data operation and processing;
the power supply module is connected with the singlechip and used for realizing power supply;
the lifting module is connected with the singlechip and used for realizing height adjustment of the sickbed;
the rescue module is connected with the singlechip and used for seeking help to the nurse station;
the help module wireless positioning method specifically comprises the following steps:
the coordinate of the anchor node in the communication range of the node O to be positioned is Ai(xi，yi) Wherein i is 0,1, …, n (n is more than or equal to 4);
the method comprises the following steps: sampling a received signal r (t) by a node to be positioned to obtain a sampling signal r (N), wherein N is 0,1, …, N-1, N represents the number of subcarriers contained in an OFDM symbol, and simultaneously recording a sending node of the received signal as Ai(xi,yi)；
Step two: calculating a cross-correlation value E according to the sampling signal r (n);
step three: according to the logarithmic distance path loss model, the node to be positioned and the anchor node A are calculated according to the following formulaiThe distance between:
Pr(d′i)＝Pr(d0)-10·γ lg(d′i)+Xσ；
wherein, Pr(d′i) Indicating a distance d from the transmitting endi' time derived cross-correlation value, Pr (d)0) Indicating distance from sender d0The cross-correlation value obtained at 1 meter, γ represents the path loss factor, lg (·) represents a logarithmic operation with a base of 10, XσObeying a Gaussian distribution with a mean value of 0 and a standard deviation of sigma;
calculating the distances d 'between each anchor node and the node O to be positioned by utilizing the formula'iThe coordinates of the corresponding anchor nodes are respectively Ai(xi,yi) Where i is 0,1,2, …, n;
step four: estimating the coordinates O (x, y) of the node to be positioned according to a self-adaptive distance correction algorithm;
the specific method of the second step comprises the following steps:
firstly, constructing a correlation window consisting of continuous sampling sequences with the length of l at the same sampling position in m continuous OFDM symbols, and then expressing a log-likelihood function Λ (τ) corresponding to the correlation window as follows:
wherein, the argument τ represents the starting point of the correlation window, and m represents the number of consecutive OFDM symbols;
and secondly, sliding the correlation window by the length of N + L sampling points to obtain the maximum value of the log-likelihood function Lambda (tau), wherein the sampling time corresponding to the maximum value is the initial position of the OFDM symbol
Wherein,representing the value of an independent variable tau when the function obtains the maximum value, representing a log-likelihood function by Λ (tau), representing the number of continuous OFDM symbols by m, representing the length of continuous sampling sequences at the same sampling position by L, representing a sampling signal by r (N), representing the number of subcarriers contained in the OFDM symbols by N, representing the number of sampling points of a cyclic prefix part in the OFDM symbols by L, and being a modulo operator by L;
thirdly, according to the starting position of the OFDM symbolCalculating a cross-correlation value E:
the fourth step specifically comprises:
firstly, selecting a differential correction point, determining a coordinate of a positioning intersection point and a plurality of positioning intersection points, and calculating the distance between the positioning intersection points;
from d'i(i-0, 1,2, …, n) selecting the anchor node A with the smallest distance value0For the difference correction point, the 3 smallest distance values are extracted from the remaining distance values, assuming that these 3 are distance values d'1、d′2And d'3The coordinates of the corresponding anchor nodes are respectively A1(x1,y1)、A2(x2,y2) And A3(x3,y3) Respectively with anchor nodes Ai(xi,yi) Is the center of a circle, d'iThree positioning circles i are made for the radius, wherein i is 1,2 and 3, 6 intersection conditions of the three positioning circles exist, two intersection points exist between the two circles, and the two intersection points are two equal real number intersection points or two unequal real number intersection points or two complex number intersection points; selecting one intersection point with a smaller distance from the center coordinates of the third positioning circle from two intersection points of the two positioning circles as a positioning intersection point to participate in positioning of the node to be positioned; the three positioning intersections and the number m ' of the plurality of positioning intersections are determined by the 3 positioning circles, and the coordinates of the positioning intersections determined by the positioning circles 2 and 3 are A ' (x '1,y′1) And the coordinates of the positioning intersection points determined from positioning circle 1 and positioning circle 3 are B '(x'2,y′2) The coordinates of the positioning intersection determined by the positioning circle 1 and the positioning circle 2 are C '(x'3,y′3) The distances between the positioning intersection points A 'and B', B 'and C', A 'and C' are d12、d23、d13：
Secondly, setting a threshold T, an individual difference coefficient correction coefficient omega and a parameter lambda (lambda > 0);
thirdly, according to the distances d between the three positioning intersection points12、d23And d13Judging whether d 'is needed'1、d′2、d′3Make a correction if d12<T、d23<T、d13<T, then do not need to be d'1、d′2、d′3Correcting, executing the fifth step, otherwise, d 'needs to be corrected'1、d′2、d′3Correcting and executing the fourth step;
fourthly, adjusting direction correction factors lambda of three measuring distances1、λ2And λ3D 'is corrected according to the following adaptive distance correction formula'1、d′2、d′3Obtaining a corrected distance d1、d2、d3：
Wherein d isiRepresenting the node to be positioned and the anchor node AiCorrected distance between d0iRepresenting a differential correction point A0And anchor node AiActual distance between, d'0iRepresenting a differential correction point A0And anchor node AiA measured distance therebetween, ω represents an individual difference coefficient correction coefficient, λiRepresents the directional correction factor, exp (-) represents the exponential function;
according to the corrected distance d1、d2、d3Re-solving the distance d between the three corrected positioning intersections12、d23、d13Returning to the third step;
fifthly, calculating the positioning coordinate O (x) of the node to be positioned according to the following formula0,y0)：
Wherein, α1、α2、α3Respectively represent x'1、x′2、x′3β weight of1、β2、β3Are respectively y'1、y′2、y′3The weight of (c);
the buzzer is connected with the singlechip and used for realizing medicine taking reminding;
the entrance guard module is connected with the singlechip and used for opening a ward door;
the touch screen is connected with the singlechip and used for sending instructions to the singlechip and controlling the singlechip to operate;
the image fusion method of the touch screen comprises the following specific steps:
1) applying a sliding window technique to a source image XA,XBIn the above, the two images are respectively changed intoA size ofThen the divided image blocks are changed into an n-dimensional column vector form;
2) for i image block of source image j (j ═ A, B)First subtract their mean valueObtaining the image block after the average value is subtractedThen obtaining a common sparse coefficient by solving the formulaAnd two different sparse coefficients
3) Substituting the obtained sparse coefficients into formulaObtaining the fused coefficients
4) By passingObtaining a fused image XFI image block of
5) Using transformation methods to obtainBecome of sizeThe image block of (1); obtaining a fused image X by weighted averagingF；
The method for eliminating the bottleneck effect of the single-chip microcomputer MIMO-CCRN comprises the following steps:
step one, the set of relays to be selected is made asSelecting relay nodes
Step two, calculating PT and each relay nodeSignal to noise ratio of formed linkAnd obtain
Step three, calculating a candidate set of relay nodesSignal-to-noise ratio of link with PRWherein
Step four, comparingAndthe size of (d);
step five, ifSelecting a single relay that achieves maximum end-to-end spectral efficiencyIn the first phase, the transmitting end PT of the user is authorized to powerBroadcast message spCognitive user ST1With powerTo SR1Transmitting data s1(ii) a If the selected relay node is SR1，SR1Respectively recover tospAnd s1(ii) a If the selected relay node is ST2，ST2To spReception, SR1To s1Receiving; in the second stage of the process,with powerForwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，Transmission power to assist primary user data transmissionThe calculation is as follows,
step six, ifSelecting two relay SRs1And ST2(ii) a In the first phase, the user transmitting terminal PT is authorized to send powerBroadcasting messages s to cognitive userspCognitive user ST1With powerTo SR1Transmitting data s1，ST2Recovery spAnd eliminate the signal from ST1Interference of (2), SR1Respectively recover spAnd s1，SR2To spReceiving; in the second stage, SR1And ST2Respectively with powerAndforwarding authorized user data s to PRp，ST2With powerTo SR2Transmitting data s2，SR2Need to eliminate the signal from SR1And ST2Interference of (ST)2Designing a transmission mode to transmit s2No interference is generated to PR; SR1And ST2Total power to assist primary user data transmissionThe calculation is as follows:
each relay has a power for granting data transmission of
2. The internet-based infection-preventing hospital bed control system for medical department according to claim 1, wherein a solar panel is installed at a power end of the power supply module, and the solar panel is electrically connected with the power supply module.
3. The internet-based infection-preventing hospital bed control system for medical department according to claim 1, wherein an angle scale is installed on the hospital bed, and a fluorescent layer is adhered on the surface of the angle scale.
4. The internet-based infection-preventing hospital bed control system for medical department according to claim 1, wherein the touch screen is wrapped with a waterproof film on the outside.
CN201711192354.0A 2017-11-24 2017-11-24 A kind of aseptic Medical hospital bed control system Internet-based Pending CN108335742A (en)

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Application publication date: 20180727