CN110200763A - A kind of medical suspension bed weighing system and method - Google Patents
A kind of medical suspension bed weighing system and method Download PDFInfo
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- CN110200763A CN110200763A CN201910345138.8A CN201910345138A CN110200763A CN 110200763 A CN110200763 A CN 110200763A CN 201910345138 A CN201910345138 A CN 201910345138A CN 110200763 A CN110200763 A CN 110200763A
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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
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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
- A61G7/05—Parts, details or accessories of beds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
- A61M5/16845—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion by weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/44—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons
- G01G19/445—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing persons in a horizontal position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
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Abstract
The present invention discloses a kind of medical suspension bed weighing system and method, and system is made of bed base unit, tension-compression sensor carrier unit, silicon sand support unit, silicon sand storage warehouse, main control module and communication module.Tension-compression sensor carrier unit uses six high-precision tension-compression sensors, is placed in same level and is uniformly distributed in suspension bed supporting point, acquires weighing data in real time.The method of weighing data application Spline Wavelets Analysis is handled, and eliminates noise therein, the weighing data of output energy adjuvant clinical.According to clinical demand, in the time range of setting, the increasing of record storage patient's weight, decrement provide corresponding sound-light alarm.Nursing staff sets the suggestion of expert system referring in, carries out fluid infusion or adjustment fluid infusion velocity.Have benefited from high-precision weighing system and the interior expert system set, can the timely fluid infusion of assisted care personnel, effectively prevent patient to lose liquid and excessively suffer a shock, while reducing the working strength of nursing staff.
Description
Technical field
The invention belongs to medical suspension bed technology scopes.It refers in particular to manage using six pull pressure sensor using spline wavelets
By filtering out noise；Expert system handles weight signal, assists the medical suspension bed of patient's fluid infusion.
Background technique
Infection is burns unit important topic, and the surface of a wound of fire victim provides good culture medium for bacterial growth, is suitable for temperature
Humidity is more advantageous to mass propagation of the bacterium on the surface of a wound.Medical suspension bed use can be effectively reduced wound infection rate and add
Fast wound repair.It is medical suspension bed include control system, cooling system, high-temperature heating decontamination system, weighing system, and comprising
The suspension that efficient air intake filter, heat drying device, high pressure blower, micro-porous permeable diffuser plate (PE material), silicon are husky, dedicated filter is single
Fluid system.With fluid mechanics principle, pretreated clean compressed air contains a large amount of micropore (diameters by bed body bottom
4-25 μm), and uniformly sprayed upwards with the ventilative diffuser plate of bed bottom homalographic, pass through and hold up filled in upper bed body it is a large amount of
Tiny silicon is husky (70-140 μm of diameter, the gross mass ≈ 600Kg of silicon sand), is formed on its surface the state of similar water " boiling ", greatly
" the sand bubble " of amount does not stop to roll upwards, generates buoyancy upwards.These silicon sand surfaces are covered with the dedicated filter that mesh diameter is 35 μm
Single, to prevent silicon sand from passing through, patient lies at receives treatment thereon.The buoyancy that silicon sand driftization is formed in suspension bed can reduce patient bed
The pressure that unit body surface area and the surface of a wound are born；Xeothermic air can pass through filter and singly pour on the surface of a wound, make to filter Dan Shangwei life
The dry inactivation of object cell, while accelerating the dry incrustation of wounds；The sepage of patient is coagulated after being absorbed by silicon sand to agglomerate, and is sunk to
On the sieve at bed bottom, the further contact of bacterium and patient body-surface is prevented, provides good condition for the healing of burn wound.
Medical suspension bed two classes that are divided into substantially: one kind is sand air-fluidized bed；One kind is multi-faceted pneumatic suspension bed.The two
Compare, the former core component need to consume a large amount of raw material, and processing technology is complicated, and technical difficulty is low；The latter does not need with solid
Grain, processing technology is relatively easy, but technical threshold is high, and the main producer headed by the U.S. develops multi-faceted pneumatic suspension
Bed belongs to such product.According to China's national situation, medical suspension bed research and development evening, the lower sand air-fluidized bed of technical difficulty are relatively suitble to me
State and medium level country promote and apply.II type of Clinitron that imported product has U.S. HILLROM to produce is fluid suspended to be controlled
Treat instrument, the air jet suspension bed of U.S. KCL production, and the Redactron suspension burn-healing bed of Holland；Domestic Ningbo is stepped on
The medical suspension bed occupation rate of market of bright medical equipment Co., Ltd production is higher, using sand flow body.
It is general medical suspension bed equipped with weighing device, including four weighing sensors, it is mounted below four angles of bracket, uses
It is converted to acquire bracket, groove body and the weight of patient, weight signal through A/D, send CPU to handle and show, can measure patient's
Weight value.Based on ergonomics theory, using " ergonomics diagram " data, when human body is liied in bed, sampling head and foot
If 4 load cell signals, the point of application of the force-detecting position far from human body main by weight cause measurement accuracy to decline, therefore need to be
This adds 2 weighing sensors.There are various disturbance factors in view of generally medical suspension bed, weighing data is caused to have biggish mistake
Difference.When nursing staff is to fire victim's fluid infusion, the biggish weighing data of error dare not be used.But patient's weight change need to mend in time
Liquid causes nursing staff that must pay close attention to for a long time.Fire victim lies in persistently high thermal current for a long time and dry filter is single
On, body moisture is largely evaporated, and normal physiology goes to the toilet, and is further exacerbated by loss of moist.In group burn event, doctor
It is inadequate to protect personnel amount, a large amount of debridement work, Yi Fasheng fluid infusion is not in time；The Water-Electrolyte of patient is uneven, suffers from causing
Person's hyperosmotic dehydration, critical life.Therefore, it is necessary to be accurate to the patient of milliliter fluid infusion, lie on dynamic suspension bed, accurately
Changes of weight is shown and timely fluid infusion is alarmed, it appears particularly necessary.
Suspension bed is mingled with various disturbances when weighing, and be broadly divided into: (1) loss of fire victim's body fluid and volatilization cause
Changes of weight.This change procedure is extremely slow, is characterized as low frequency signal.Sensor, A/D conversion in dynamic weighing hardware platform
There are various electronic components for circuit etc., generate high-frequency signal.The high-frequency signal of useful low frequency signal and interference is mingled with, and is not easy to obtain
Take correct amount signal.To meet clinical demand, weighing-up wave high-frequency noises need to be eliminated.Signal noise silencing processing is actually one
A signal filtering processing.Wavelet analysis is analyzed better than Fourier, it has good localization in time domain and frequency domain simultaneously
Matter.Its principle, if { Vj}j∈zIt is L2(R) a multiresolution analysis, WjIt is VjIn Vj+1In the orthogonal complement space.Enable PjAnd QjPoint
It is not L2(R) V is arrivedjAnd WjOn rectangular projection.Equipped with signal f (t) ∈ L2(R), it is through the noise-containing signal that instrument measures
Pjf∈Vj, then have
The process that signal is decomposed with wavelet transformation, be exactly successively the various frequency contents in signal from high to low
Gradually it is separated into the process of different frequency bands.To B-spline scaling functionFor wavelet function ψ, frequency band be approximately respectively [-
π, π] and [- 2 π ,-π] U [π, 2 π], therefore, QjF frequency range is approximately [- 2j+1π,-2jπ]U[2jπ,2j+1π].If filtered
The frequency of noise is located at QjF frequency band orientation, then only need to be during signal reconstruction by QjF is set as zero.As needed, it also can be used small
Wave packet decomposes, by QjF is further decomposed.(2) support bracket deformation, the interference that patient floats and sand body flowing generates.General doctor
It is heavier with suspension bed body, silicon sand and patient's gross weight, about 1 ton, the buttocks of long 2.25m, especially patient and the load-bearing of bed body middle
Pressure is big, only has fulcrum there are four angle, bracket middle is easily-deformable, recessed；Patient can also generate a tentering with the sand of fluidisation
The movement of degree；The integral level degree of bed, airflow direction, patient's center of gravity etc. have certain disturbance.Various interference lead to existing title
The error of weight system is larger.
The gross area of burning is greater than 30% body surface area or III degree of burn surface area is greater than 10% body surface area.Or the gross area is insufficient
31%, but have the one of following situations: systemic conditions are serious or have shock person；Having combined injury or associated injury, (such as severe trauma is changed
Learn poisoning etc.)；In, the patient of moderate and severe inhalation.Infant's head are burnt more than 5%.Clinically it is diagnosed as severe burn.
It reduces by 3 behaves of severe burn patients malpractice probability of happening: basing oneself upon existing suspension bed structure, add patient's buttocks two
A high-precision pull pressure sensor, acquires initial data in real time.With the method for Spline Wavelets Analysis, making an uproar for initial data is eliminated
Sound, output meet the weighing-up wave of clinical requirement, error within the allowable range.According to clinical demand, clinical auxiliary unit energy
In the time range of setting, judges that patient's weight increases, is reduced, provides corresponding sound-light alarm and the interior expert system set,
Judge fluid infusion or adjustment fluid infusion velocity.The more representational intellectual property Summary on research results of medical suspension bed weighing system and method
It is as follows:
Patent of invention " high-precision weighing device for medical suspension bed " (CN201120215066.4) proposes that a kind of reduction claims
The high-precision weighing device for medical suspension bed of weight error is mounted between bracket and weighting platform, is used to using four weighing sensors
The weight for bearing weighing platform, groove body and patient, send CPU individually to handle measured signal, analog quantity is digitized respectively, can measure
Patient body weight.
Patent of invention " double perseverance laminar flows are medical suspension bed " (CN201410598290.4) proposes that a kind of double permanent laminar flows are medical
Suspension bed is capable of providing the closing warehouse of constant-temperature constant-humidity environment and can provide constant-temperature constant-humidity environment from bottom to top, guarantees patient
The back side and front Suitable therapeutic environment humidity, temperature, and have the space of independently recuperating of locomotive function.Equipped with sterilization group
Part ensure that patient treats under clean environment.
It is above-mentioned to benefit our pursuits, there is certain reference value, but explore achievement and still deposit limitation.Therefore, it is necessary to base oneself upon existing
Research achievement makees in-depth study on medical suspension bed weighing system and availability.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of medical suspension bed weighing system and method.
System is by bed base unit, tension-compression sensor carrier unit, silicon sand support system, silicon sand storage warehouse, main control module
It is formed with communication module；Tension-compression sensor carrier unit includes every group of 2 tension-compression sensors, three groups of totally 6 tension-compression sensors
Original weight data collection point；The filter list that silicon sand storage warehouse sets up isolation silicon sand and patient directly contacts, filter are single by silica gel pressure
Item is fixed；
Tension-compression sensor carrier unit includes 6 tension-compression sensors, model YP-L1/200Kg, and fixed sensor
Bracket composition, one of tension-compression sensor is fixed on the right side of the head of a bed at the fulcrum of bracket, a tension-compression sensor is fixed on bed
At the fulcrum of middle right side bracket, a tension-compression sensor is fixed on the right side of tailstock at the fulcrum of bracket, a tension-compression sensor is consolidated
It is scheduled at the fulcrum of tailstock left side brackets, a tension-compression sensor is fixed in bed at the fulcrum of left side brackets, a tension and compression pass
Sensor is fixed at the fulcrum of head of a bed left side brackets, and 6 tension-compression sensors are in same level；
Suspension bed follows existing mainstream suspension bed structure, is additionally arranged 2 tension-compression sensors among bed body.It obtains because of bracket
Intermediate deformation and the data lost, obtain weighing data more comprehensively, it is more acurrate.
The tension-compression sensor analog signal processing using 24 A/D converter HX711 chips as core, power supply with
HX711 foot 1, foot 16 are connected；Triode Q1 base stage is connected with HX711 foot 2, and Q1 emitter is connected with the one end capacitor C1, and C1's is another
One end is connected to the ground；Q1 collector, tension-compression sensor foot 1, one end of R1, C2 one end be connected with HX711 foot 3；R1's is another
It holds, one end of R2 is connected with HX711 foot 4；The R2 other end, the other end of C2, C3 one end be connected and be grounded with HX711 foot 5；C3
The other end be connected with HX711 foot 6；The one end C4, the one end R3 are connected with HX711 foot 7, the other end and tension-compression sensor foot 3 of R3
It is connected；One end of R4, the other end of C4 are connected with HX711 foot 8, and the other end of R4 is connected with tension-compression sensor foot 4；Terminal
DI201 is connected with HX711 foot 12, corresponding to access main control unit ATmega128 foot 60；Terminal DO201 is connected with HX711 foot 11,
Corresponding access main control unit ATmega128 foot 36.For convenient for narration, remaining sensor main control unit input terminal be DI202,
DI203,DI204,DI205,DI206；Output end is DO202, DO203, DO204, DO205, DO206, is also turned using 24 A/D
Parallel operation HX711 chip, peripheral circuit are similar.
The main control module using ATmega128 chip as core, distinguish by ATmega128 foot 60,59,58,57,56,55
With terminal DI201、DI202、DI203、DI204、DI205、DI206It is connected；ATmega128 foot 36,37,38,39,40,41 respectively with end
Sub- DO201、DO202、DO203、DO204、DO205、DO206It is connected；Main control module is connected through communication module with monitoring center.
Original weight data is passed to MCU by the tension-compression sensor, using the suspension bed denoised based on spline wavelets
Weighing analytic approach, comprising the following steps:
(1) suspension bed weighing-up wave is acquired；
(2) suspension bed weighing-up wave is stored；
(3) suspension bed weighing data is extracted after the weighing data denoising acquired；
(4) t minutes and t+15 minutes moment suspension bed weighing-up wave are extracted, difference send MCU to handle.
The step (3) the following steps are included:
(3-1) to original suspension bed weighing-up wave with the number of plies be 4 layers of progress wavelet decomposition, obtain small echo high frequency layer and small echo
Low frequency layer；
(3-2) filters out original suspension bed weighing-up wave using generic threshold value in the 2nd layer of wavelet low frequency layer:
To signaling point S to be processed, the territory of k step-length is selected；
K mode processed is put on the basis of S point, the arithmetic for calculating separately data absolute value in the territory of each mode is flat
Mean value selects maximum average value therein as S point feature value, with the original amplitude of S point feature value substitution S point；
S point feature value after substitution is compared with generic threshold value, when S point feature value is greater than generic threshold value, signal
Point all retains original amplitude；When S point feature value is less than or equal to generic threshold value, zero setting is carried out to signaling point；
K is natural number, and the maximum value value of k is the half of signal pulsewidth；
The calculation formula of generic threshold value σ are as follows:
σ is noise criteria variance, and n is the length of signal；
Arithmetic mean of instantaneous value calculation formula are as follows:
(3-3) directly resets small echo high frequency layer, filters out to high-frequency noise and 50hz industrial frequency noise；
(3-4) reconstructs the original suspension bed weighing-up wave extracted, as next step original suspension bed weighing-up wave
Input signal.
The application method of the weighing data adjuvant clinical fluid infusion of the medical suspension bed weighing system, it is characterised in that including
Following steps:
1) suspension bed power supply is connected, the log of suspension bed expert system is verified, weighing system real-time display does not suspend
The weight of state, including upper bed body, particulate material weight, unlatching blower fan system, the weight of weighing system real-time display suspended state,
Under the state weighing system reset after, patient is put on suspension bed, weighing system show patient, infusion segment leather hose and
Tied up gauze weight, if the time point is t0, weight G0；To t after Δ t0+ Δ t (clinic generally sets Δ t as 15 minutes),
Weight increases to G0+ Δ G (clinic generally sets Δ G as 500 grams)；
2) weighing system reads G0, set Δ t and Δ G value；
3) judge that Δ G is positive and negative；
3-1) judge Δ G for timing；
3-1-1) infusion increases, and is green light, returns 3)；It is no, into 3-1-2；
3-1-2) nasal feeding increases, and is green light, returns 3)；It is no, into 3-1-3；
It 3-1-3) feeds, is green light, return 3)；It is no, into 3-1-4；
It 3-1-4) intakes, is green light, return 3)；
When 3-2) judging that Δ G is negative；
3-2-1) surface of a wound evaporates, and is, alarms, red light is bright, into 4)；It is no, it returns 3)；
Blood oozing from the wound surface is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Wound exudate is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Vomiting is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Stool is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Urine is to alarm, red light is bright, into 4)；It is no, it returns 3)；
It perspires, is, alarm, red light is bright, into 4)；It is no, it returns 3)；
Autogenous cutting evaporation is to alarm, red light is bright, into 4)；It is no, it returns 3)；
VSD drainage is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Dialysis is to alarm, red light is bright, into 4)；It is no, it returns 3)；
4) medical staff confirms, alarm is effective, fluid infusion；It returns 3).
Compared with the background technology, the present invention, it has the beneficial effect that
This system adds two high-precision tension-compression sensors in the buttocks of patient, i.e. bed body middle, avoids losing and occupies
The signal of the interposition buttocks of human body main by weight.Crude sampling weight data is handled by Spline Wavelets Analysis method, into one
Step eliminates noise therein and interference, and output meets the weighing-up wave of clinical requirement, error within the allowable range.Expert system
Then according to clinical demand, it can judge that patient's weight increases, is reduced in the time range of setting, provide corresponding sound-light alarm.Doctor
Shield personnel judge fluid infusion or adjustment fluid infusion velocity according to the interior process set.Have benefited from high-precision weighing system and suspension bed is special
Family's system, can effectively assist the timely fluid infusion of medical staff, prevent patient from losing the excessive shock death of liquid, reduce the work of medical staff
Intensity and operating pressure eliminate the hidden danger of malpractice.
Detailed description of the invention
Fig. 1 is medical suspension bed main view and top view；
Fig. 2 is high-precision tension-compression sensor A/D conversion circuit figure；
Fig. 3 is main control unit circuit diagram；
Fig. 4 is the signal graph without spline wavelets denoising；
Fig. 5 is the signal graph denoised through spline wavelets；
Fig. 6 is weighing-up wave flow chart；
Fig. 7 is the operating mode flow chart of suspension bed expert system.
In figure, bed base unit 100, tension-compression sensor carrier unit 200, full sand support system 300, storage sand warehouse 400,
Silica gel press strip 500；Main control module 600 and communication module 700, the 1st tension-compression sensor 201 and its fulcrum 21, the 2nd tension and compression pass
Sensor 202 and its fulcrum 22, the 3rd tension-compression sensor 203 and its fulcrum 23, the 4th tension-compression sensor 204 and its fulcrum 24,
5th tension-compression sensor 205 and its fulcrum 25, the 6th tension-compression sensor 206 and its fulcrum 26；1st tension-compression sensor input
Main control unit signal end DI201, the 2nd tension-compression sensor input main control unit signal end DI2023rd tension-compression sensor input master
Control cell signal end DI203, the 4th tension-compression sensor input main control unit signal end DI204, the 5th tension-compression sensor input master
Control mono signal end DI205, the 6th tension-compression sensor input main control unit signal end DI206；Main control unit is defeated by the 1st tension and compression and is passed
Sensor signal end is DO201, main control unit be defeated by the 2nd tension-compression sensor signal end be DO202, main control unit be defeated by the 3rd drawing
Pressure sensor signal end DO203, main control unit be defeated by the 4th tension-compression sensor signal end DO204, main control unit be defeated by the 5th drawing
Pressure sensor signal end DO205, main control unit be defeated by the 6th tension-compression sensor signal end DO206。
Specific embodiment
As shown in Figure 1, system by bed base unit 100, tension-compression sensor carrier unit 200, silicon sand support unit 300,
Silicon sand storage warehouse 400, main control module 600 and communication module 700 form；Tension-compression sensor carrier unit 200 includes every group of 2 drawings
The original weight data collection point of pressure sensor, three groups of totally 6 tension-compression sensors；Silicon sand storage warehouse 400 set up isolation silicon sand and
The filter list that patient directly contacts, filter is single to be fixed by silica gel press strip 500；
Tension-compression sensor carrier unit 200 includes 6 tension-compression sensors, model YP-L1/200Kg, and fixed sensor
Bracket composition, wherein tension-compression sensor 201 is fixed on the right side of the head of a bed at the fulcrum 21 of bracket, tension-compression sensor 202 is fixed on
In bed at the fulcrum 22 of right side bracket, tension-compression sensor 203 be fixed on the right side of tailstock at the fulcrum 23 of bracket, tension-compression sensor
204 are fixed at the fulcrum 24 of tailstock left side brackets, tension-compression sensor 205 is fixed at the fulcrum 25 of left side brackets in bed, draw
Pressure sensor 206 is fixed at the fulcrum 26 of head of a bed left side brackets, and tension-compression sensor 201, tension-compression sensor 202, tension and compression biography
Sensor 203, tension-compression sensor 204, tension-compression sensor 205 and tension-compression sensor 206 are in same level；
Suspension bed follows existing mainstream suspension bed structure, is additionally arranged among bed body centre tension-compression sensor 202 and bed body
Tension-compression sensor 205.By tension-compression sensor among bed body is added, the letter for occupying the interposition buttocks of human body main by weight is obtained
Number, obtain weighing data more comprehensively, it is more acurrate.
2, as shown in Fig. 2, 201 analog signal processing of tension-compression sensor is with 24 A/D converter HX711 chips
Core, power supply are connected with HX711 foot 1, foot 16；Triode Q1 base stage is connected with HX711 foot 2, Q1 emitter and the one end capacitor C1
It is connected, the other end of C1 is connected to the ground；Q1 collector, 201 foot 1 of tension-compression sensor, one end of R1, one end of C2 and HX711 foot 3
It is connected；The other end of R1, one end of R2 are connected with HX711 foot 4；The R2 other end, the other end of C2, one end of C3 and HX711 foot 5
It is connected and is grounded；The other end of C3 is connected with HX711 foot 6；The one end C4, the one end R3 are connected with HX711 foot 7, the other end of R3 with
201 foot 3 of tension-compression sensor is connected；One end of R4, the other end of C4 are connected with HX711 foot 8, the other end and tension-compression sensor of R4
201 feet 4 are connected；Terminal DI201 is connected with HX711 foot 12, corresponding to access main control unit ATmega128 foot 60；Terminal DO201 with
HX711 foot 11 is connected, corresponding to access main control unit ATmega128 foot 36.For convenient for narration, remaining sensor is defeated in main control unit
Entering end is DI202, DI203, DI204, DI205, DI206；Output end be DO202, DO203, DO204, DO205, DO206, also
Using 24 A/D converter HX711 chips, peripheral circuit and tension-compression sensor 201 are similar.
3, as shown in figure 3, main control module 600 is using ATmega128 chip as core, ATmega128 foot 60,59,58,57,
56,55 respectively with terminal DI201、DI202、DI203、DI204、DI205、DI206It is connected；ATmega128 foot 36,37,38,39,40,41
Respectively with terminal DO201、DO202、DO203、DO204、DO205、DO206It is connected；Main control module 600 is through in communication module 700 and monitoring
The heart is connected.
4, as shown in Figure 4, Figure 5, original weight data is passed to MCU by tension-compression sensor, is gone using based on spline wavelets
The suspension bed weighing analytic approach made an uproar, comprising the following steps:
(1) suspension bed weighing-up wave is acquired；
(2) suspension bed weighing-up wave is stored；
(3) suspension bed weighing-up wave is extracted after carrying out denoising to original suspension bed weighing-up wave；
(4) t minutes and t+15 minutes moment suspension bed weighing-up wave are extracted, difference send MCU to handle.
The step (3) the following steps are included:
(3-1) to original suspension bed weighing-up wave with the number of plies be 4 layers of progress wavelet decomposition, obtain small echo high frequency layer and small echo
Low frequency layer；
(3-2) filters out original suspension bed weighing-up wave using generic threshold value in the 2nd layer of wavelet low frequency layer:
To signaling point S to be processed, the territory of k step-length is selected；
K mode processed is put on the basis of S point, the arithmetic for calculating separately data absolute value in the territory of each mode is flat
Mean value selects maximum average value therein as S point feature value, with the original amplitude of S point feature value substitution S point；
S point feature value after substitution is compared with generic threshold value, when S point feature value is greater than generic threshold value, signal
Point all retains original amplitude；When S point feature value is less than or equal to generic threshold value, zero setting is carried out to signaling point；
K is natural number, and the maximum value value of k is the half of signal pulsewidth；
The calculation formula of generic threshold value σ are as follows:
σ is noise criteria variance, and n is the length of signal；
Arithmetic mean of instantaneous value calculation formula are as follows:
(3-3) directly resets small echo high frequency layer, filters out to high-frequency noise and 50hz industrial frequency noise；
(3-4) reconstructs the original suspension bed weighing-up wave extracted, as next step original suspension bed weighing-up wave
Input signal.
5, as shown in Figure 6, Figure 7, a kind of weighing data adjuvant clinical fluid infusion using medical suspension bed weighing system is answered
With method, include the following steps:
1) suspension bed power supply is connected, the log of suspension bed expert system is verified, weighing system real-time display does not suspend
The weight of state, including upper bed body, particulate material weight, unlatching blower fan system, the weight of weighing system real-time display suspended state,
Under the state weighing system reset after, patient is put on suspension bed, weighing system show patient, infusion segment leather hose and
Tied up gauze weight, if the time point is t0, weight G0；To t after Δ t0+ Δ t (clinic generally sets Δ t as 15 minutes),
Weight increases to G0+ Δ G (clinic generally sets Δ G as 500 grams)；
2) weighing system reads G0, set Δ t and Δ G value；
3) judge that Δ G is positive and negative；
3-1) judge Δ G for timing；
3-1-1) infusion increases, and is green light, returns 3)；It is no, into 3-1-2；
3-1-2) nasal feeding increases, and is green light, returns 3)；It is no, into 3-1-3；
It 3-1-3) feeds, is green light, return 3)；It is no, into 3-1-4；
It 3-1-4) intakes, is green light, return 3)；
When 3-2) judging that Δ G is negative；
3-2-1) surface of a wound evaporates, and is, alarms, red light is bright, into 4)；It is no, it returns 3)；
Blood oozing from the wound surface is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Wound exudate is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Vomiting is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Stool is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Urine is to alarm, red light is bright, into 4)；It is no, it returns 3)；
It perspires, is, alarm, red light is bright, into 4)；It is no, it returns 3)；
Autogenous cutting evaporation is to alarm, red light is bright, into 4)；It is no, it returns 3)；
VSD drainage is to alarm, red light is bright, into 4)；It is no, it returns 3)；
Dialysis is to alarm, red light is bright, into 4)；It is no, it returns 3)；
4) medical staff confirms, alarm is effective, fluid infusion；It returns 3).
Claims (5)
1. a kind of medical suspension bed weighing system, which is characterized in that system is by bed base unit (100), tension-compression sensor branch
Frame unit (200), silicon sand support unit (300), silicon sand storage warehouse (400), silica gel press strip (500), main control module (600) and logical
Believe module (700) composition；Tension-compression sensor carrier unit (200) include every group of 2 tension-compression sensors, three groups totally 6 tension and compression pass
The weight data collection point of sensor；Silicon sand storage warehouse (400) sets up isolation silicon sand and the filter list that directly contacts of patient, filter it is single by
Silica gel press strip (500) is fixed；
Tension-compression sensor carrier unit (200) further includes 6 tension-compression sensors, model YP-L1/200Kg, and fixed sensor
Bracket；6 tension-compression sensors make axial symmetry distribution using the length axis of bed as symmetry axis；Tension-compression sensor one (201) is drawn
Pressure sensor two (202), tension-compression sensor three (203) are separately fixed at the fulcrum one (21) of bracket on the right side of the head of a bed, right side in bed
At the fulcrum two (22) of bracket, the fulcrum three (23) of tailstock right side bracket, tension-compression sensor four (204), tension-compression sensor five
(205), tension-compression sensor six (206) is similar, and 6 tension-compression sensors are located on same level mounting surface；Tension-compression sensor two
(202) it is located among bed body with tension-compression sensor five (205).
2. the medical suspension bed weighing system of one kind according to claim 1, which is characterized in that the tension-compression sensor
(201) using 24 A/D converter HX711 chips as core, power supply is connected analog signal processing with HX711 foot 1, foot 16；Three poles
Pipe Q1 base stage is connected with HX711 foot 2, Q1 emitter and capacitor C1One end is connected, C1The other end be connected to the ground；Q1Collector, drawing
Pressure sensor (201) foot 1, R1One end, C2One end be connected with HX711 foot 3；R1The other end, R2One end and HX711 foot 4
It is connected；R2The other end, C2The other end, C3One end be connected and be grounded with HX711 foot 5；C3The other end and 6 phase of HX711 foot
Even；C4One end, R3One end is connected with HX711 foot 7, R3The other end be connected with tension-compression sensor (201) foot 3；R4One end, C4's
The other end is connected with HX711 foot 8, R4The other end be connected with tension-compression sensor (201) foot 4；Terminal DI201With 12 phase of HX711 foot
Even, corresponding to access main control unit ATmega128 foot 60；Terminal DO201It is connected with HX711 foot 11, accordingly accesses main control unit
ATmega128 foot 36；Remaining sensor is DI in main control unit input terminal202、DI203、DI204、DI205、DI206；Output end is
DO202、DO203、DO204、DO205、DO206, also use 24 A/D converter HX711 chips, peripheral circuit and tension-compression sensor
(201) similar.
3. the medical suspension bed weighing system of one kind according to claim 2, which is characterized in that the main control module
(600) using ATmega128 chip as core, ATmega128 foot 60,59,58,57,56,55 respectively with terminal DI201、DI202、
DI203、DI204、DI205、DI206It is connected；ATmega128 foot 36,37,38,39,40,41 respectively with terminal DO201、DO202、DO203、
DO204、DO205、DO206It is connected；Main control module (600) is connected through communication module (700) with monitoring center.
4. a kind of weighing method using medical suspension bed weighing system as described in claim 1, which is characterized in that described
The weight data of acquisition is passed to MCU by tension-compression sensor, using the suspension bed weighing analytic approach denoised based on spline wavelets, including
Following steps:
(1) suspension bed weighing-up wave is acquired；
(2) suspension bed weighing-up wave is stored；
(3) suspension bed weighing data is extracted after the weighing data denoising acquired；
(4) t minutes and t+15 minutes moment suspension bed weighing-up wave are extracted, difference send MCU to handle；
The step (3) the following steps are included:
(3-1) obtains small echo high frequency layer and wavelet low frequency to suspension bed weighing-up wave is acquired with the number of plies as 4 layers of progress wavelet decomposition
Layer；
(3-2) filters out acquisition suspension bed weighing-up wave using generic threshold value in the 2nd layer of wavelet low frequency layer:
To signaling point S to be processed, the territory of k step-length is selected；
K mode processed is put on the basis of S point, calculates separately the arithmetic average of data absolute value in the territory of each mode
Value selects maximum average value therein as S point feature value, with the acquisition amplitude of S point feature value substitution S point；
S point feature value after substitution is compared with generic threshold value, when S point feature value is greater than generic threshold value, signaling point is complete
Portion retains acquisition amplitude；When S point feature value is less than or equal to generic threshold value, zero setting is carried out to signaling point；
Wherein, k is natural number, and the maximum value value of k is the half of signal pulsewidth；
The calculation formula of generic threshold value σ are as follows:
σ is noise criteria variance, and n is the length of signal；
Arithmetic mean of instantaneous value calculation formula are as follows:
(3-3) directly resets small echo high frequency layer, filters out to high-frequency noise and 50hz industrial frequency noise；
(3-4) reconstructs the original suspension bed weighing-up wave extracted, the input as next step original suspension bed weighing-up wave
Signal.
5. a kind of method of the weighing data adjuvant clinical fluid infusion using medical suspension bed weighing system as described in claim 1,
It is characterized by comprising the following steps:
1) suspension bed power supply is connected, the log of suspension bed expert system, the non-suspended state of weighing system real-time display are verified
Weight, including upper bed body, particulate material weight open blower fan system, the weight of weighing system real-time display suspended state, the shape
After weighing system is reset under state, patient is put on suspension bed, weighing system shows patient, infusion segment leather hose and tied up
Gauze weight, if the time point is t0, weight G0；To t after Δ t0+ Δ t, weight increase to G0+ΔG；
2) weighing system reads G0, set Δ t and Δ G value, Δ t=15 minutes, Δ G=500g；
3) judge that Δ G is positive and negative；
3-1) when Δ G is timing；
3-1-1) judge whether it is infusion to increase, if it is, 3) green light, returns；It is no, into 3-1-2；
Nasal feeding increase 3-1-2) is judged whether it is, if it is, 3) green light, returns；It is no, into 3-1-3；
Feed 3-1-3) is judged whether it is, if it is, 3) green light, returns；It is no, into 3-1-4；
3-1-4) judge whether it is into water, if it is, 3) green light, returns；
3-2) when Δ G is negative；
3-2-1) judge whether it is surface of a wound evaporation, if it is, alarm, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is blood oozing from the wound surface, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is wound exudate, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is vomiting, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is stool, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is urine, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is perspiration, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is autogenous cutting evaporation, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is VSD drainage, be, alarms, red light is bright, into 4)；It is no, it returns 3)；
Judge whether it is dialysis, be, alarms, red light is bright, into 4)；It is no, it returns 3)；4) medical staff confirms, alarm effectively, is mended
Liquid；It returns 3).
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