CN1513432A - Mobile type numerically controlled hydraulic external heart pressing apparatus - Google Patents

Mobile type numerically controlled hydraulic external heart pressing apparatus Download PDF

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Publication number
CN1513432A
CN1513432A CNA2003101042554A CN200310104255A CN1513432A CN 1513432 A CN1513432 A CN 1513432A CN A2003101042554 A CNA2003101042554 A CN A2003101042554A CN 200310104255 A CN200310104255 A CN 200310104255A CN 1513432 A CN1513432 A CN 1513432A
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China
Prior art keywords
universal wheel
hydraulic cylinder
push
pushing
press head
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CNA2003101042554A
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Chinese (zh)
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CN100396269C (en
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毛宝伦
杨最素
诸华丰
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Mao Baolun
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Individual
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Priority claimed from CNA031431240A external-priority patent/CN1468592A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H31/00—Artificial respiration or heart stimulation, e.g. heart massage
    • A61H31/004—Heart stimulation
    • A61H31/005—Heart stimulation with feedback for the user
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/12—Driving means
    • A61H2201/1238—Driving means with hydraulic or pneumatic drive
    • A61H2201/1246—Driving means with hydraulic or pneumatic drive by piston-cylinder systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/50—Control means thereof
    • A61H2201/5058—Sensors or detectors
    • A61H2201/5071—Pressure sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/50—Control means thereof
    • A61H2201/5058—Sensors or detectors
    • A61H2201/5087—Flow rate sensors

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

A numerally controlled movable external hydraulic heart pressing machine features that three cylinders for respectively controlling the universal wheel, pressing frame and pressing head are driven by an oil pump, the motor of oil pump, commutating electromagnetic valve, the reverse valve of step motor, proportional electromagnetic pressure valve, flow valve and hydraulic system are controlled by the sensed different signals and predefined program, and after the machine is turned on, the heart is automatically and periodically pressed according to default parameters.

Description

Movable numerically-controlled hydraulic pressure external cardiac compression machine
Affiliated technical field
The present invention relates to a kind of medical apparatus and instruments, be used for cardiac arrest patient's rescue.
Background technology
Cardiac arrest should rescue immediately once making a definite diagnosis, and carries out effective artificial respiration, sets up effective artificial blood circulation.After the sudden cardiac arrest, the cerebral tissue acute ischemia must cause anoxic brain injury, and the time of its order of severity and sudden cardiac arrest is closely related.Though part patient obtains the cardio-pulmonary resuscitation success, because of causing death, the infringement of irreversibility brain function dies or residual serious sequela eventually.At present, setting up aspect the artificial blood circulation, generally adopt the method for artificial external cardiac compression, with 80～100 times/minute frequencies thoracic wall is sunk 4～5 centimeters, its advantage is fast and convenient, but operator's technology is had very strict requirement, and compression frequency is not enough, the degree of depth is not enough, and it is undesirable to push effect; Pushed dark, firmly complication such as fracture of rib appear in inequality easily; Operator's physical demands is excessive, and fatiguability is difficult to the lasting effect that guarantees to push; When deadly infectious disease man-hours such as rescue SARS, the infected probability of operator heightens.Existing cardiac compression apparatus, portable often, its press head easily is shifted, and the support shakiness can not reach according to pressing depth enough, can't guarantee to push effect; Locate firm, often during moving charge, it as number of patent application 98249385.1 automatic cardiac depressor, reach the purpose of external cardiac compression by the driven by motor eccentric, and be furnished with manual arrangement for adjusting height, but machines cumbersome, move inconvenience, can't reach the purpose of quick rescue, and it is excessive to occupy space, patient front, influences other and rescue carrying out of step; Air operated external heart pressing device such as number of patent application are that 93117260.8 device for cardiac resuscitation and number of patent application are 01274169.8 full-automatic cardiac massage recovery instrument, because the impact of air pressure, cause fracture of rib easily, its preliminary preparation is also comparatively time-consuming; And number of patent application is 95111032.2 and 95239721.8 hydraulic multi-function computor-controlled machine for recovering heart and lung of humanbody, adopted hydraulic drive that heart is pushed, be difficult for taking place fracture of rib, ad-hoc location but patient must lie on this machine, then the hydraulic cylinder of being furnished with pectoral girdle being put into the patient front just can rescue, and to the cardiac arrest patient, carrying out external cardiac compression immediately on the spot is basic principle, thereby also can not get practical application, also there is not the external cardiac compression apparatus in " the medical apparatus and instruments classified catalogue " of State Food and Drug Administration at present.
Summary of the invention
In order to make external cardiac compression effective and rapid, stable lasting, avoid the generation of complication such as fracture of rib, reduce the medical worker by the infectious probability of deadly infectious disease, the invention provides a kind of hydraulicdriven external cardiac compression machine of movable numerically-controlled digital display that can just can come into operation in the time several seconds kinds.
The technical solution adopted for the present invention to solve the technical problems is: this machine is the electromechanical integrated product that adopts single-chip microcomputer (MCU) control technology, utilizes hydraulic transmission principle; An oil pump drags the hydraulic cylinder of three kinds of functions, one group of universal wheel hydraulic cylinder, and the lifting of control universal wheel is convenient to machine and is moved and the press head centralized positioning; Adorn one group in the side of fuselage and push the frame lifting hydraulic cylinder, the lifting that frame is pushed in control is used for press head height location; Push hydraulic cylinder and be contained in an end of pushing the frame cantilever, press head is connected the piston-rod lower end of pushing hydraulic cylinder; Force cell is housed on the press head, pushes hydraulic cylinder and be furnished with displacement sensor according to pressing depth, and the pressure transducer and the flow transducer of pushing the oil circuit flow of universal wheel upper and lower limit level sensor and measurement hydraulic system pressure are housed; Operating board is housed above the fuselage, single-chip microcomputer is by pre-set programs, according to the control of operating board button and sensor signal motor, universal wheel hydraulic cylinder solenoid directional control valve, push frame lifting hydraulic cylinder solenoid directional control valve, push reversing rotary valve, solenoid-operated proportional flow valve, solenoid-operated proportional pressure valve that hydraulic cylinder solenoid directional control valve or motor drive, and then start-stop, the lifting of universal wheel, the height of pushing frame and press head, the compression frequency of control hydraulic system, cover than (pressing down period T 1Account for the percentage ratio of whole period T), according to pressing depth, press head presses down speed, pushes intensity; Pushing preceding and pushing in the process and can regulate parameter by arrow key; The compression frequency of setting, according to pressing depth, cover ratio, push intensity and system pressure, flow shows in real time with charactron, motor rotation, universal wheel and indicate synchronously with display lamp when pushing frame and moving up and down, the press head pressing force that according to pressing depth reaches thoracic wall of living in shows synchronously with bar graphic display, and is equipped with and pushes intensity, according to pressing depth exceed the warning adjusting device.
This movable numerically-controlled hydraulic pressure external cardiac compression machine is mainly located fast, is constituted by pressing system and Single-chip Controlling display system by movable hydraulic roof.
Movable hydraulic roof locatees fast, by pressing system: drag a hydraulic pump by a single-phase 220V ac motor, push frame lifting hydraulic cylinder, one with one group of universal wheel hydraulic cylinder, one group and push hydraulic cylinder and corresponding direction, pressure, speed, balance, synchronizing control loop etc. and form hydraulic systems.
The inside of fuselage is fuel tank, tank cover the inside oil loading pump, above a side motor is installed, opposite side is a hydraulic manifold block, direction, pressure, flow control valve etc. are installed on the hydraulic manifold block, and motor, hydraulic manifold block and hydraulic valve encase with case, are operating board above the case.
The universal wheel hydraulic cylinder plays the position of universal wheel and under-chassis and makes relative motion up and down, when the universal wheel hydraulic cylinder make jump area under the universal wheel, when under-chassis is liftoff, machine can move freely on ground, so that press head is aimed at suitable position, patient front rapidly, and rise when the universal wheel hydraulic cylinder makes universal wheel, under-chassis lands, and fuselage is stable, pushes Shi Buhui and rocks.The universal wheel hydraulic cylinder can adopt universal wheel and fuselage to make relative position motion, under-chassis and fuselage fixed-site and universal wheel and fuselage fixed-site, under-chassis and fuselage and make the relative motion dual mode.
Employing universal wheel and fuselage are made relative position motion, under-chassis and fuselage fixed-site mode, and under-chassis landed when universal wheel stretched out less touch with the ground on opportunity, universal wheel withdrawal.With the cylinder base or the piston rod of single-piston rod formula hydraulic cylinder be fixed in the fuel tank base plate, the other end links to each other with the universal wheel vehicle frame, draw under-chassis under fuselage base plate four angles, a plurality of universal wheels are installed below the vehicle frame, with four jiaos a universal wheel being installed respectively is first-selection, for machine can be come into operation when needed fast, during standby, should make universal wheel be in the state of landing, on the universal wheel hydraulic cylinder, is furnished with the hydraulic control one-way valve balanced loop, effect with preventing gravity makes oil liquid leakage, fuselage slowly descends and causes under-chassis to land, and influence is promptly used.The quantity of universal wheel hydraulic cylinder can be one, also can be a plurality of, only adorn one, hydraulic cylinder is bigger, the center of gravity of machine must be by the center of hydraulic cylinder piston rod, when promoting machine because of being subjected to force unbalance, influence the sealing property of oil cylinder, easily cause the leakage of fluid, install a plurality ofly, be advisable so that 3～4 identical universal wheel hydraulic cylinders of specification to be installed, adorn 3, mid point in universal wheel vehicle frame one side is installed one, respectively adorns one on the angle, front and back of opposite side, by 1: 2 flow divider-combiner and 1: 1 flow divider-combiner, element such as electrohydraulic servo valve or proportional flow control valve is formed synchronization loop; Adorn 4, can respectively adorn 1, mix corresponding flow distributing and collecting element and form synchronization loop at universal wheel vehicle frame four jiaos.
Adopt universal wheel and fuselage fixed-site, under-chassis and fuselage are made the relative position motion mode, and when under-chassis is withdrawn, universal wheel lands, under-chassis stretches out when landing, universal wheel is liftoff.Several (is practicality with 4) hydraulic cylinders are formed synchronization loop, when adopting single-piston rod formula hydraulic cylinder, cylinder body or piston rod are fixed in four jiaos of fuselage base plate or sides, the other end is drawn under-chassis downwards, when adopting the double piston-rod hydraulic cylinder, then cylinder body and fuselage side are fixed, piston rod is drawn under-chassis downwards.
Push the frame lifting hydraulic cylinder and be contained in the side of fuselage, relative motion is up and down made in the position that is used to push frame and fuselage, regulates the press head height, 1～2 of quantity.For making the machine construction compactness, hydraulic cylinder can be contained in the fuselage medial wall.Adopt piston rod single-piston-rod hydraulic cylinder up, the stroke that piston moves up and down is longer; Adopt solid double-piston rod-type, steadiness is good when pushing, and the oil cylinder internal leakage is few.Be furnished with the hydraulic control one-way valve balanced loop at the epicoele of pushing the frame lifting hydraulic cylinder, adopt hydraulic control one-way valve to add the balanced loop of one way sequence valve at cavity of resorption.Adopt single hydraulic cylinder, pushing frame is made up of piston rod cover, cantilever, transverse arm, slide bar, sliding sleeve etc., be fixed in the piston rod upper end of pushing hydraulic cylinder by fastening nut, sliding sleeve with push the frame lifting hydraulic cylinder and parallel, be loaded on its offside, slide bar closely is enclosed within the sliding sleeve, and the upper end links to each other with the piston rod cover by transverse arm, reaches the effect that increases stability, the rotation of prevention piston, reduces the oil cylinder internal leakage when pushing.When pushing the oil-feed of frame lifting hydraulic cylinder epicoele, push frame and move down, drive and push hydraulic cylinder and press head decline, then push on the frame when pushing the oil-feed of frame lifting hydraulic cylinder cavity of resorption and move, drive and push hydraulic cylinder and press head rising.Adopt hollow double-piston rod-type, piston rod two is fixed, cylinder body is up and down, pushes the frame crane and links to each other with cylinder body, and when its epicoele oil-feed, cylinder body raises, and drives and pushes frame, press head rises, and the cavity of resorption oil-feed is then opposite.Adopt 2 hydraulic cylinders, change slide bar, the sliding sleeve of offside into hydraulic cylinder, form synchronization loop.
Universal wheel hydraulic cylinder, universal wheel and push the frame lifting hydraulic cylinder, push frame and form the movable hydraulic roof quick positioning system.
Hydraulic pressure constitutes with the press head that is loaded on its piston-rod lower end by being connected in the hydraulic cylinder of pushing of pushing frame cantilever outer end by pressing system.Can adopt piston rod single bar hydraulic cylinder or double piston-rod hydraulic cylinder of living down, adopt the outward appearance of single-piston-rod hydraulic cylinder succinct, but when piston is capable when arriving the below end, may because of the press head discontinuity to a lateral deviation.Adopt the double piston-rod hydraulic cylinder then can avoid off normal.In the middle of the two-layer plectane of press head a force cell is housed, upwards draw several guide rods from the certain angle in upper strata plectane interval, in the side of pushing hydraulic cylinder the guide rail or the collar are housed, guide rod passes through from the guide rail or the collar, guide rod not only can stop that press head rotates, off normal but also the force cell lead-in wire is drawn from its center, and as the carrier of displacement transducer moving part.Employing double-piston rod-type, the upper end of guide rod links to each other with the piston upper boom.Thin rubber planchet of cover below the press head.The range of pushing hydraulic cylinder piston fixes on about 6 centimeters, and when pushing the oil-feed of hydraulic cylinder epicoele, press head moves down, to the lower compression thoracic wall, make heart penetrate blood to tremulous pulse, during the cavity of resorption oil-feed, press head is replied, the thoracic wall resilience, venous return reaches the purpose of external cardiac compression.
For the direction control problem of pushing hydraulic cylinder, owing to require the compression frequency per minute 80～100 times, the commutation response speed is fast, can select wet type AC type 3-position 4-way solenoid directional control valve for use, but frequent commutation has very high requirement to its quality.Also can adopt the reversing rotary valve of step motor control.One end of reversing rotary valve valve body has oil-in, oil return opening, the other end has two actuator port A, B, there is A the both sides of the radially stifled oil section of spool, B two grease chambeies, hydraulic fluid port A, B then communicates with separately annular groove, annular groove passes through oil duct and A separately, the B grease chamber communicates, the rotating shaft of spool is driven by motor, rotation along with spool, oil-in, oil return opening and actuator port A, the variation of the break-make situation generating period of B, block oil-in and oil return opening as the stifled oil section of the spool of original position, each oil pipe is not connected, and press head is in 0, when driving spool, motor clockwise rotates, oil-in and A mouth are connected, and when oil return opening and B mouth are connected, push the oil-feed of hydraulic cylinder epicoele, piston moves down, and pushes thoracic wall downwards; When motor makes spool forward the half cycle position to, be plugged again into and out of hydraulic fluid port, each oil pipe is not connected again, press head be positioned at push require degree of depth place; Motor makes spool continue to clockwise rotate, and oil-in is communicated with the B mouth, when oil return opening communicates with the A mouth, moves on the piston, and press head is upwards replied; When press head was got back to 0, motor made spool get back to original position immediately, blocked once more into, oil return opening, so went round and began again, and spool whenever circles, and finished once the complete process of pushing, loosen.
The control display system: single-chip microcomputer is by pre-set programs, according to the control of operating board button and sensor signal motor, universal wheel hydraulic cylinder solenoid directional control valve, push frame lifting hydraulic cylinder solenoid directional control valve, push reversing rotary valve that hydraulic cylinder solenoid directional control valve or motor drive, the action of solenoid-operated proportional flow valve, solenoid-operated proportional pressure valve, and then height, the compression frequency of the lifting of the start-stop of control hydraulic system, universal wheel, press head, cover ratio, according to pressing depth, press head presses down speed, pushes intensity.
The single-chip microcomputer input information is from operating board button and pick off.
16 buttons are arranged on the operating board, are respectively: ON/OFF switch, universal wheel rise strong, universal wheel puts down key, push frame rising key, push frame decline key, push frame lifting stop key, push the program initiating key, push the program stop key, frequency raises key, frequency downconverts key, the degree of depth raise key, degree of depth down key, cover than raising key, cover than down key, pushing intensity and raise key, push the intensity down key.
Pick off: two Boolean value output sensors, universal wheel upper limit pick off that the liftoff under-chassis of perception universal wheel lands and perception universal wheel land the liftoff universal wheel lower limit pick off of under-chassis; Analog sensor has four, force cell is contained in the middle of the two-layer plectane of press head, quiet of displacement transducer is fixed in the sidewall of pushing hydraulic cylinder, moving part is contained on the guide rod that press head links to each other, the pressure of pressure transducer examining system, flow transducer is surveyed the flow of pressing hydraulic circuit, links to each other with the single-chip processor i/o interface by transmitter, A/D converter.
Output control motor, hydraulic directio control valve, pressure-control valve, flow control valve and the display alarm system of single-chip microcomputer.
The output of single-chip microcomputer is pushed frame rising coil, is pushed frame decline coil through driver, AC type photoisolator control motor, solenoid directional control valve universal wheel rising coil, universal wheel decline coil, solenoid directional control valve, and then the control running of oil pump and the operation of hydraulic system, the ascending, descending of universal wheel, the ascending, descending of pushing frame, driving mouth separately also connects a LED light, to show residing state.
The control of pushing hydraulic cylinder there is dual mode according to the selection by the reversal valve of hydraulic circuit.
Adopt solenoid directional control valve control press head to move, single-chip microcomputer also passes through driver, AC type photoisolator to the control of electromagnetic switch valve coil.
The employing motor drives the reversing rotary valve mode, and single-chip microcomputer is exported through stepper motor driver control step motor.Each pushes advance step number the architectural characteristic decision by step angle and the reversing rotary valve of motor of cycle motor in the cycle each minute, for improving the response speed of reversing rotary valve, the radially stifled oil section of the spool of rotary valve is a bit larger tham into, oil return opening, make A, the covering of the fan radian of B two grease chambeies is big as far as possible, advance, when oil return opening will be connected with actuator port from closed condition, as long as motor is walked a small step and is just achieved the goal, the motor stepping is positioned at the radially stifled oil section of rotary valve spool will to block into then, the position of oil return opening, the speed of stepping is by compression frequency, cover than waiting decision, to the requirement of setting or when being returned to 0, motor can drive rotary valve spool immediately and block into when according to pressing depth, oil return opening.The motor step angle is excessive, influences the hydraulic fluid port closing velocity, and the step number that the little person of step angle then circles is too many, can reach ideal control effect with less step angle and less step number by change-speed gearing is installed between motor and rotary valve rotating shaft.
Reversing rotary valve also can be realized by forward and reverse rotation of motor the moving direction of pushing hydraulic cylinder piston.If the radially stifled oil section of spool will be advanced during initial 0mm position, oil return opening is blocked, motor stops after just changeing certain step number, A mouth and oil-in are connected, and B mouth and oil return opening are connected, and push the oil-feed of hydraulic cylinder epicoele, press head descends, after the degree of depth of setting, the step number that the motor reversing is same, the radially stifled oil section of spool is got back to original position, oil circuit is obstructed, and piston stops to move.Motor continues to stop after the certain step number of reversing, and B mouth and oil-in are connected, and A mouth and oil return opening are connected, push the oil-feed of hydraulic cylinder cavity of resorption, press head is upwards replied, behind 0mm, the step number that motor is just changeing certain makes spool get back to original position, so repeats control and pushes process.
The output of single-chip microcomputer, current intensity through multichannel D/A converter, direct current driven device control solenoid-operated proportional pressure valve, the current intensity of regulating system pressure, control solenoid-operated proportional flow valve, the flow of oil circuit is pushed in adjusting, and then control the pressing down and answer speed of press head, and with required according to pressing depth adapting.
Compression frequency, the degree of depth, cover ratio, push intensity, system pressure and push parameter such as loop flow, based on the requirement of the artificial external cardiac compression that generally adopts at present, make default setting, give the suitable value of fluctuating again.
Heart rate when normal adult is quiet is 60～100 times/minute, the requirement of the outer heart compression frequency of prosthesis is 80～100 times/minute at present, someone records 110～130 times/minute compression frequency can reach maximum cardiac output (Chinese critical illness emergency medicine, rolled up the 77th～78 page of the 2nd phase in 1993 the total the 5th), frequency setting with acquiescence is 90 times/minute for this reason, the upper limit 130 times/minute, lower limit 60 times/minute.
According to pressing depth be generally 40～50mm, cross complication such as dark easily generation fracture of rib, the shallow excessively poor effect of pushing, the big and tall especially person of physique need press more deeply, and child, modest person then will press more shallowly, default depth are made as 45mm for this reason, upper limit 60mm, lower limit 25mm.Automatic sound-light alarm when according to pressing depth surpassing setting value 3mm, red lamp is bright, and buzzer call, LED charactron show actual measurement maximum and flicker, turn down solenoid-operated proportional flow valve current intensity.
Normal person's atrium and ventricular systole are asynchronous, Atrial systole accounts for 1/8th of cardiac cycle, and the auricular diastole ventricle begins to shrink subsequently, and Ventricular systole accounts for 3/8ths of cardiac cycle, ventricular diastole enters relaxing period whole-heartedly then, and relaxing period accounts for half of cardiac cycle whole-heartedly.Atrium after heart beating stops, ventricle make cardiac ejection by extruding synchronously before and after the thoracic wall of external cardiac compression.Present pressing down and loosen time ratio and require to equate to artificial external cardiac compression, promptly cover than being 50%, but the maximized ideal of cardiac output is covered than still needing by testing further mensuration, can do the animal experiment with pig earlier by this machine, for this this machine covers acquiescence than being made as 50%, the upper limit 55%, lower limit 40%.This value can be done rationally to adjust according to experimental result, ideal covering than (be slightly less than 50% probability bigger) is set at default value.Push hydraulic cylinder and adopt the single-piston rod formula, the cavity of resorption piston area is less than epicoele, and answer speed helps the abundant resilience venous return of thoracic wall faster than the speed of pressing down.Push hydraulic cylinder and adopt the double-piston rod-type, for guaranteeing to reply the backflow of abundant resilience of cycle thoracic wall and venous blood, can cover than the diameter of determining to go up lower piston rod according to ideal, cover than being slightly less than 50% as ideal, the diameter of last lower piston rod can equate; As equal 50%, can make the upper piston rod diameter be slightly less than lower piston rod; As greater than 50%, then should make the upper piston rod diameter less than lower piston rod; As be significantly less than 50%, then the upper piston rod diameter can slightly be coarser than lower piston rod.
The hydraulic drive press head equals the resilience force of thoracic wall to press head to the pressing force of thoracic wall, when general adult is pressed into desired depth, thoracic wall to the resilience force of press head in 45Kg, big and tall especially person may be high, and the child is as long as very little pressing force is just much of that, set press head the acquiescence of thoracic wall is pushed intensity is 45Kg for this reason, can on be transferred to 60Kg, be lowered to 10Kg.The pressing force that force cell is measured exceed setting push intensity the time automatic sound-light alarm, red lamp is bright, buzzer call, LED charactron show actual measurement maximum and flicker, turn down solenoid-operated proportional pressure valve current intensity.
The cps of setting/minute, three figure places, DU mm, two figure places, cover than unit %, two figure places, push volume unit Kg, two figure places with the demonstration in real time on operating board of LED charactron, below charactron, all be furnished with upper and lower arrow and regulate button, click, relevant parameters is towards unit of direction of arrow change, pin then change continuously,, unclamp on the relevant parameter that then is set in charactron demonstration this moment midway until bound.
The epicoele oil inlet quantity equals cavity area and takes advantage of according to pressing depth when pushing, and the cavity of resorption oil inlet quantity equals cavity area down and according to pressing depth product during answer.Press head presses down period T 1Comprise that the press head of pushing the oil-feed of hydraulic cylinder epicoele moves down the period and pushes the back reversal valve that puts in place and close press head and rest on the set depth period, replys period T 2Comprise that then moving period and reversal valve on the press head cavity of resorption oil-feed press head closes press head and rest on 0 period, the flow of pushing the control of oil circuit solenoid-operated proportional flow valve should be able to guarantee press head move down the period can finish setting according to pressing depth the time make stop the period short as far as possible, on move the period and in time be returned to 0.Flow get epicoele oil inlet quantity/move down period and cavity of resorption oil inlet quantity/on move the big person of period and float 5%, when beginning, the program of pushing pushes the required flow of oil circuit by the control of solenoid-operated proportional flow valve electric current is exported, in the process of pushing,, automatically adjust by data that displacement transducer is surveyed because factors such as oil temperature variation make the flow of setting and actual needs deviation to some extent.Flow value shows with the LED charactron on operating board after flow transducer records.
System pressure is a hydraulic oil from the come out pressure of the total oil circuit behind check valve of oil pump, because the pressure loss when fluid process valve port and oil pipe, the pressure of pushing the hydraulic cylinder epicoele when pushing is less than system pressure, when flow one timing, press head press down in the process (reversal valve make push the oil-feed of hydraulic cylinder epicoele and piston is not at the end) press head to the pressing force of thoracic wall (with the resilience force of thoracic wall to press head, the measured data of force cell equate) with system pressure definite corresponding relation is arranged, thereby can be according to pushing the desirable value that intensity is determined the solenoid-operated proportional pressure valve, when the program of pushing begins by to the control of solenoid-operated proportional pressure valve electric current and control system pressure, force cell institute dynamometry is lower than setting value, the enough big press head of flow can not arrive the degree of depth of setting then by transferring big solenoid-operated proportional pressure valve current intensity that system pressure is raise on time, and force cell institute dynamometry is higher than the current intensity that setting value is then turned down the solenoid-operated proportional pressure valve.The data that pressure transducer records show it with the LED charactron on operating board.
Pre-set programs makes single-chip microcomputer connect motor when starting shooting by the ON/OFF switch, drives oil pump running, hydraulic system running, and solenoid-operated proportional pressure valve control electric current is in maximum rating, makes working connection pressure be in maximum, can adapt to the needs of fuselage lifting; Whether the press head of detecting position displacement sensor is in 0, then makes as non-0 and pushes the oil-feed of hydraulic cylinder cavity of resorption and make press head be returned to 0; Enter major cycle immediately, information such as inquiry warning, fault, running parameter, button is also made corresponding processing; As detect closing key, then only at the universal wheel lifting electromagnetic valve coil of wire, push frame lifting electromagnetic valve coil, just respond shutdown command when pushing the off working state of program.
By universal wheel lifting solenoid directional control valve universal wheel is risen by the strong single-chip microcomputer of universal wheel rising, under-chassis lands, solenoid directional control valve was got back to meta after universal wheel upper limit sensor senses put in place to the universal wheel rising, universal wheel stops to rise, simultaneously single-chip microcomputer by push frame lifting solenoid directional control valve make push frame, push hydraulic cylinder, press head descends.
Put down the key single-chip microcomputer by universal wheel and make jump area under the universal wheel by universal wheel lifting solenoid directional control valve, under-chassis is liftoff, machine can freely promote, when universal wheel lower limit sensor senses move down to universal wheel put in place after solenoid directional control valve reset, universal wheel no longer descends.
Can calculate according to the capacity in the upper and lower chamber of universal wheel hydraulic cylinder group and flow system flow that universal wheel puts down or the required maximum duration that rises, thus the way that can after putting down key or lifting key, delay time some seconds and substitute the universal wheel limit sensors by universal wheel.Consider move on the universal wheel be under emergency for making under-chassis land the stable needs that rescue of fuselage, from safe angle, universal wheel upper limit pick off should keep.
Make and push frame and rise by pushing frame lifting solenoid directional control valve by pushing frame rising key single-chip microcomputer.Then just in time make on the contrary and push frame and descend by pushing frame decline key.Then make solenoid directional control valve get back to meta by pushing frame lifting stop key, push frame and stop lifting.When pushing frame and move down, single-chip microcomputer chooses A/D converter force cell passage to inquire about, in case press head touches thoracic wall, force cell measure press head to the pressing force of thoracic wall after single-chip microcomputer make immediately and push frame lifting solenoid directional control valve and get back to meta and push frame and stop to move, and start the program of pushing automatically.Can calculate it equally according to the upper and lower capacity of pushing the frame lifting hydraulic cylinder and flow system flow and be elevated to limit position required time, when raising strong or the strong back as do not stop strong and force cell is not measured resistance by pushing the frame lifting of descending by pushing frame, the certain hour of then delaying time (the time length of calculating) single-chip microcomputer makes to be pushed frame lifting solenoid directional control valve and automatically resets.
The program of pushing can by by push the program initiating key or in pushing the frame folding process force cell measure pressing force and start.Single-chip microcomputer by the acquiescence compression frequency, the degree of depth, cover ratio, intensity is carried out external cardiac compression, as pushing preceding or pushing in the process parameter carried out adjusting and then push with adjusted parameter, solenoid-operated proportional flow valve, solenoid-operated proportional pressure valve adapt to automatically pushes the needs of process.
The program of pushing is because of by the different difference to some extent of the selected reversal valve of hydraulic circuit.
The employing solenoid directional control valve, because after the Single-chip Controlling signal is cancelled, only when being zero, just turn-offs the bidirectional triode thyristor load current flowing through, and the maximum turn off delay time of 50Hz alternating current power supply is 10ms, for avoiding solenoid directional control valve two lateral coils to switch on simultaneously, pressing down period T 1And answer period T 2Respectively establish the interval of a 10ms before the end, i.e. be T the longest control electric current conduction time that the solenoid of hydraulic cylinder epicoele oil-feed is pushed in control 1-10ms, be T the longest control electric current conduction time of the solenoid of control cavity of resorption oil-feed 2-10ms.
T 1Timing begins, solenoid directional control valve makes pushes the oil-feed of hydraulic cylinder epicoele, press head moves down since 0, per 3～the 5ms of single-chip microcomputer samples to displacement transducer, with identical frequency force cell is sampled, send bar graphic display to show sampled result, and with according to pressing depth set or push intensity and compare, at T 1A half from flow transducer sampling 1 time and send demonstration, surpass setting value or intervalometer timing to T in case according to pressing depth put, push intensity in place 1-10ms, single-chip microcomputer resets solenoid directional control valve, piston stops to move, and to pressure transducer sampling 1 time, if unusual automatic warning arranged, surpass setting value as force cell and then institute is surveyed the highest pressing force and send the LED charactron to show and flicker, turn down solenoid-operated proportional pressure valve control electric current automatically and reduce system pressure, surpass as the degree of depth and set value 3mm, then the depth capacity of being surveyed send the LED charactron to show and flicker, turns down the control electric current of solenoid-operated proportional flow valve automatically and pushes the oil circuit flow with reduction.T 2Timing begins, and solenoid directional control valve makes pushes the oil-feed of hydraulic cylinder cavity of resorption, and single-chip microcomputer is same regularly to be sampled, show, compares, at T displacement transducer, force cell 2Half flow sensor sampling 1 time and send demonstration, the degree of depth is returned to 0 or intervalometer timing to T 2-10ms, solenoid directional control valve resets.If by being pressed in T 195～100% of-10ms arrives and to require the degree of depth and at T 2Be returned to 0 or in-the 10ms at T 1Arrive in-the 10ms and require the degree of depth and at T 2-10ms 95～100% in be returned to 0, then to press down speed suitable for press head, flow is suitable; Both all are shorter than 95%, illustrate that press head presses down excessive velocities, and flow is too big, and the control electric current of turning down the solenoid-operated proportional flow valve reduces pushes the oil circuit flow; If there is one can not put in place on time, considered when design press head can be replied fast that generally speaking, press head can be at T owing to push the upper and lower piston rod of hydraulic cylinder 2In time be returned to 0 in-the 10ms, it may be underfed, the control electric current of heightening the solenoid-operated proportional flow valve also may be an insufficient pressure to increase flow, does not surpass setting value as pressing force and heightens the control electric current of solenoid-operated proportional pressure valve simultaneously to increase system pressure.So go round and begin again and finish automatic external cardiac compression.
The employing motor drives reversing rotary valve, T 1Timing begins, the Single-chip Controlling motor is done clockwise stepping immediately and is rotated, the reversing rotary valve spool makes to be pushed oil circuit and transfers the A mouth to from closed condition and communicate with oil-in, press head moves down since 0, motor continues stepping makes the radially stifled oil section of spool of reversing rotary valve wait near the position of blocking into and out of hydraulic fluid port, single-chip microcomputer is identical with the mode that adopts the solenoid directional control valve commutation to the sampling of sampling, demonstration, comparison and the flow transducer of displacement transducer, force cell, in case according to pressing depth put in place, pressing force transfinites, T 1Finish motor stepping immediately valve port is closed, single-chip microcomputer is to pressure transducer sampling 1 time, T 2Timing begins, motor forwards the position that reversing rotary valve B mouth communicates with oil-in to makes press head begin to reset, motor be rotated further make the stifled oil section of rotary valve spool again near into and out of oil port (with last time holding fix differ 180 degree angles) wait, in case be returned to 0 or T 2Finishing motor makes rotary valve spool get back to original position will to push oil circuit and close.Single-chip microcomputer to the analysis of the process of pushing with adopt the basic identical of solenoid directional control valve, T just 1, T 2Need not subtract 10ms.The uniform rotation of when finishing the work, trying one's best of the same external cardiac compression that realizes of so going round and beginning again, the stepping rate of motor.
After being returned to 0, finishes press head the program of pushing by pushing program stop key single-chip microcomputer, single-chip microcomputer makes and pushes frame and rise by pushing frame lifting solenoid directional control valve subsequently, press head leaves thoracic wall, as not adding intervention, push frame and will be raised to the upper limit, time-delay certain hour solenoid directional control valve is got back to meta automatically, as then making press head rest on corresponding height by pushing frame lifting stop key in elevation process.
By expansion ROM, RAM, adopt LCD Chinese to show, can further strengthen the Presentation Function of machine.
Beneficial effect of the present invention is mainly reflected in following several respects: the one, and the electronics numerical control, simple to operate, flexibly and fast, manually press the start key during standing-by state operation, promoting machine makes the press head location suitable, press the universal wheel lifting key, machine just carries out automatic external cardiac compression by the fast operating conditions that enters of pre-set programs, can not stop over the rescue to patient; The 2nd, intuitive display can pushed preceding or push in the process parameter is regulated, and can regulate frequency, the degree of depth of pushing easily, covers ratio, push the intensity preset value to reach the best effect of pushing by the arrow key on the operating board; The 3rd, have determined curative effect, stablize persistent advantage with manually pushing to compare; The 4th, the safety coefficient height, hydraulic drive, press head presses down at the uniform velocity, steadily, do not have impact, is difficult for taking place complication such as fracture of rib, pressing force, according to pressing depth transfinites and reports to the police automatically, regulates; The 5th, press head is small and exquisite, and it is little to take up space in patient's front, helps the expansion of other rescue work; The 6th, can allow the doctor free hand to, take further emergency measures such as electric defibrillation, electric pace-making, recover autonomous cardiac rhythm as early as possible, in order to the success rate that improves recovery; The 7th, rescue the deadly infectious disease man-hour, reduced the infected probability of medical worker.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
3 single-piston rod formula universal wheel hydraulic cylinders of embodiment are formed synchronization loop, cylinder base and fuselage base plate are fixed, universal wheel links to each other with hydraulic cylinder piston rod by the universal wheel vehicle frame, push 1 of frame lifting hydraulic cylinder and select two solid piston rod-types for use, push hydraulic cylinder and also be two solid piston rod-types, push oil circuit and adopt solenoid directional control valve and motor reversing rotary valve dual mode.
Fig. 1 is the profile sketch map of this movable numerically-controlled hydraulic pressure external cardiac compression machine.
Fig. 2 is operating board button and displaying alarm distribution schematic diagram.
Fig. 3 is hydraulic circuit figure.
Fig. 4 is the reversing principle sketch map of reversing rotary valve.
Fig. 5 is the Single-chip Controlling theory diagram, selects solenoid directional control valve or motor reversing rotary valve to get one according to pushing directional control valve in the frame of broken lines.
Fig. 6 is the main program flow block diagram.
1. fuselages among the figure, 2. fuselage base plate, 3. under-chassis, 4. universal wheel, 5. universal wheel vehicle frame, 6. left side universal wheel hydraulic cylinder, 7. right front universal wheel hydraulic cylinder, 8. right back universal wheel hydraulic cylinder is 9. pushed the frame lifting hydraulic cylinder, 10. left side universal wheel hydraulic cylinder piston, 11. left side universal wheel hydraulic cylinder piston rods, 12. left side universal wheel hydraulic cylinder epicoeles, 13. left side universal wheel hydraulic cylinder cavity of resorption, 14. right front universal wheel hydraulic cylinder pistons, 15. right front universal wheel hydraulic cylinder piston rods, 16. right front universal wheel hydraulic cylinder epicoele, 17. right front universal wheel hydraulic cylinder cavity of resorptions, 18. push frame lifting hydraulic cylinder piston, 19. push frame lifting hydraulic cylinder upper piston rod, 20. push frame lifting hydraulic cylinder lower piston rod, 21. push frame lifting hydraulic cylinder epicoele, 22. push frame lifting hydraulic cylinder cavity of resorption, 23. push frame, 24. piston rod covers, 25. fastening nut, 26. cantilevers, 27. transverse arms, 28. slide bar, 29. sliding sleeves, 30. push hydraulic cylinder, 31. push hydraulic cylinder piston, 32. push the hydraulic cylinder upper piston rod, 33. push the hydraulic cylinder lower piston rod, 34. push the hydraulic cylinder epicoele, 35. push the hydraulic cylinder cavity of resorption, 36. press heads, 37. force cell, 38. guide rods, 39. force cells lead-in wire, 40. the collar, 41. displacement transducers, 42. universal wheel upper limit pick offs, 43. universal wheel lower limit pick off, 44. universal wheel limit sensors blocks, 45. hydraulic manifold blocks, 46. operating board, 47. ON/OFF switches, 48. motor display lamps, 49. ten thousand and the wheel lifting key, 50. universal wheel rising display lamps, 51. universal wheels put down key, 52. universal wheel puts down display lamp, 53. push frame rising key, and 54. push frame lifting stop key, 55. push frame decline key, 56. push frame rising display lamp, 57. push frame decline display lamp, 58. push the program initiating key, 59. push the program stop key, 60. pressing force bar graphic display, 61. bar graphic display according to pressing depth, the digital tube display of 62. frequencies, 63. frequencies raise key, 64. frequency downconverts key, 65. set depth charactron display, 66. degree of depth raise key, 67. degree of depth down key, cover than charactron display 68. set, 69. cover than raising key, 70. cover than down key, intensity charactron display is pushed in 71. settings, raise key 72. push intensity, 73. push the intensity down key, 74. alarm lamps, 75. buzzers, 76. system pressure charactron display, 77. push the digital tube display of oil circuit flow, 78. right back universal wheel hydraulic cylinder pistons, 79. right back universal wheel hydraulic cylinder piston rods, 80. right back universal wheel hydraulic cylinder epicoele, 81. right back universal wheel hydraulic cylinder cavity of resorption, 82. fuel tanks, 83. filters, 84. oil pump, M. oil pump motor, 85. check valves, 86. solenoid-operated proportional pressure valve, 87. solenoid-operated proportional flow valve, 88. flow transducer, 89. pressure transducers, 90. push the reversal valve oil inlet pipe, 91. push the reversal valve oil return pipe, 92. push solenoid directional control valve, 93. oil pipes, 94. oil pipes, 95. push frame lifting reversal valve oil inlet pipe, 96. push frame lifting solenoid directional control valve, 97. oil pipes, 98. one way sequence valve balanced loops, 99. overflow valve, 100. oil pipe, 101. check valves, 102. control oil circuits, 103. oil pipe, 104. oil pipe, 105. hydraulic control one-way valves, 106. oil pipes, 107. control oil circuit, 108. oil pipe, 109. hydraulic control one-way valves, 110. oil pipes, 111. control oil circuit, 112. oil pipe, 113. universal wheel solenoid directional control valves, 114. oil pipes, 115. control oil circuit, 116. oil pipe, 117. hydraulic control one-way valves, 118. oil pipes, 119. oil pipe, 120. oil pipe, 121. oil pipes, 122. oil pipes, 123. oil pipe, 124. oil pipe, 125. oil pipes, 126. oil pipes, 127. electrohydraulic servo valve, 128.1: 2 flow divider-combiners, 129.1: 1 flow divider-combiners, 130. oil pipes, 131. oil pipe, 132. oil pipe, 133. oil pipes, 134. electrohydraulic servo valves, 135. steel band, 136. balance plate, 137. assembly pulleys, 138. differential transformers, 139. servo valve amplifier, 140. steel band, 141. assembly pulleys, 142. differential transformers, 143. servo valve amplifier, 144. universal wheel vehicle frame left and right directions pulley bracket, 145. universal wheel vehicle frame fore-and-aft direction pulley brackets, 146. reversing rotary valves and valve body, 147. rotary valve spool, 148. rotating shaft, 149. motors, 150. A of grease chamber, 151. the B of grease chamber, 152. oil-in, 153. oil return openings, 154. oil duct A, 155. oil duct B, 156. annular groove B, 157. annular groove A, 158. hydraulic fluid port B, 159. hydraulic fluid port A, YA 1. universal wheel rising solenoid, YA 2. universal wheel decline solenoid, YA 3. push frame rising solenoid, YA 4. push frame decline solenoid, YA 5. press head lower piezoelectric magnetic coil, YA 6. press head is replied solenoid.
The specific embodiment
In order to make machine can drop into rescue when needed rapidly, should make machine be in standing-by state at ordinary times.The three-terminal polarized plus plug of soft sheathed conductor is inserted single-phase three sockets, and conductor length can guarantee that machine moves freely in the rescue place, and machine is near as far as possible from emergency bed's position.Energising back single-chip microcomputer enters holding state after initialization 1 and safety detection.
By ON/OFF switch (47), single-chip microcomputer is connected Oil pump electrical machinery (M) power supply, make motor (M) running, motor display lamp (48) is bright, driving oil pump (84) rotates, fluid is from fuel tank (82), suck oil pump (84) through filter (83), pressure oil arrives total oil circuit through check valve (85), this moment universal wheel solenoid directional control valve (113), push frame lifting solenoid directional control valve (96) and push solenoid directional control valve (92) or reversing rotary valve (146) all is in closed condition, hydraulic system pressure raises rapidly, the initial adjustment pressure that surpasses solenoid-operated proportional pressure valve (86), the oil circuit conducting, pressure oil is through solenoid-operated proportional pressure valve (86) oil sump tank (82).When connecting Oil pump electrical machinery (M) power supply, single-chip microcomputer carries out initialization 2 operations and detects, and makes solenoid-operated proportional pressure valve (86) electric current maximum, hydraulic system pressure maximization, can adapt to the needs that fuselage (1) raises; Displacement transducer (41) detects press head (36) and whether is in 0, as is non-0, then automatically resets, and pushes oil circuit and adopts solenoid directional control valve (92) to commutate, and single-chip microcomputer makes the press head of pushing solenoid directional control valve (92) reply solenoid (YA 6) energising, spool moves to right, pressure oil enters through solenoid-operated proportional flow valve (87), oil pipe (90), solenoid directional control valve (92), oil pipe (94) and pushes hydraulic cylinder cavity of resorption (35), piston moves on (31), driving press head (36) upwards replys, push hydraulic cylinder epicoele (34) fluid through oil pipe (93), push solenoid directional control valve (92), oil return pipe (91) oil sump tank (82), single-chip microcomputer is regularly inquired about, shows, is compared displacement transducer (41) simultaneously, in case press head (36) is returned to 0, single-chip microcomputer makes solenoid (YA immediately 6) dead electricity, spool is got back to meta, closes oil circuit, and press head stops to move; Push oil circuit and adopt motor (149) to drive reversing rotary valve (146) commutation, single-chip microcomputer also makes pushes hydraulic cylinder cavity of resorption (35) oil-feed, and press head (36) rises (back has detailed principle to tell about), closes oil circuit after being returned to 0; With compression frequency, the degree of depth of acquiescence, cover ratio, push intensity and the detected system pressure of pressure transducer (89) and send charactron to show; Enter major cycle immediately, information such as inquiry warning, fault, running parameter, button is also made corresponding processing.
Put down key (51) by universal wheel, single-chip microcomputer makes the universal wheel decline solenoid (YA of universal wheel solenoid directional control valve (113) 2) energising, it is bright that universal wheel puts down display lamp (52), spool moves to right, universal wheel solenoid directional control valve oil inlet pipe (112) is pressed logical with oil pipe (116), pressure oil is through oil pipe (116), hydraulic control one-way valve (117), oil pipe (118), arrive left side universal wheel hydraulic cylinder epicoele (12) through oil pipe (120) respectively behind the oil pipe (119), oil pipe (122) is to right front universal wheel hydraulic cylinder epicoele (16), oil pipe (121) is to right back universal wheel hydraulic cylinder epicoele (80), promote left side universal wheel hydraulic cylinder piston (10) and left side universal wheel hydraulic cylinder piston rod (11), right front universal wheel hydraulic cylinder piston (14) and right front universal wheel hydraulic cylinder piston rod (15), right back universal wheel hydraulic cylinder piston (78) and right back universal wheel hydraulic cylinder piston rod (79) move down, and make universal wheel vehicle frame (5), universal wheel (4) descends; The oil return of right front universal wheel hydraulic cylinder cavity of resorption (17) through the oil return of oil pipe (131), right back universal wheel hydraulic cylinder cavity of resorption (81) through oil pipe (130) to 1: 1 flow divider-combiner (129) converge after to oil pipe (124), the oil return of left side universal wheel hydraulic cylinder cavity of resorption (13) is to oil pipe (123), fluid again from oil pipe (123) and oil pipe (124) after 1: 2 flow divider-combiner (128) to oil pipe (114), universal wheel solenoid directional control valve (113) oil sump tank (82).Along with the universal wheel (4) that moves down of piston constantly descends, after universal wheel (4) landed, under-chassis (3) beginning was liftoff, and single-chip microcomputer makes universal wheel decline solenoid (YA after universal wheel lower limit pick off (43) detects universal wheel limit sensors block (44) 2) dead electricity, universal wheel puts down display lamp (52) and goes out, spool is got back to meta, close oil circuit, universal wheel (4) descends and to put in place, and this moment, the deadweight of machine had the fluid that makes 3 the universal wheel hydraulic cylinder epicoeles tendency through universal wheel solenoid directional control valve (113) backflow leakage, and hydraulic control one-way valve (117) has been blocked the leak path of fluid, guarantee that universal wheel (4) is in the state of landing for a long time, fuselage (1) can freely be passed on ground.
By pushing frame rising key (53), push frame rising solenoid (YA 3) energising, it is bright to push frame rising display lamp (56), pushing frame lifting solenoid directional control valve (96) spool moves to left, pressure oil is through oil pipe (95), solenoid directional control valve (96), oil pipe (97), oil pipe (100), check valve (101), oil pipe (103), oil pipe (104), hydraulic control one-way valve (105), oil pipe (106) is to pushing frame lifting hydraulic cylinder cavity of resorption (22), hydraulic control one-way valve this moment (109) still is in closed condition, pushing frame lifting hydraulic cylinder piston (18) can not move up, in-line pressure is raise rapidly, the pressure of control oil circuit (107) rises, hydraulic control one-way valve (109) conducting immediately, push frame lifting hydraulic cylinder epicoele (21) fluid through oil pipe (108), hydraulic control one-way valve (109), oil pipe (110), push frame lifting solenoid directional control valve (96) and get back to fuel tank (82), push on the frame lifting hydraulic cylinder piston (18) and move, frame (23) is pushed in drive, push hydraulic cylinder (30), press head (36) rises, after press head (36) is elevated to a little higher than sick bed and fat patient's thoracic wall anteroposterior diameter sum, by pushing frame lifting stop key (54), single-chip microcomputer makes pushes frame rising solenoid (YA 3) dead electricity, push frame rising display lamp (56) and go out, to push frame lifting solenoid directional control valve (96) and reset, oil circuit is closed, and pushes frame (23), press head (36) height by hydraulic control one-way valve (109) and hydraulic control one-way valve (105) locking.
By ON/OFF switch (47), single-chip microcomputer cuts out output, and motor (M) stops operating, and motor display lamp (48) is closed, and demonstration stops.
Machine universal wheel this moment (4) lands and can move freely on ground, and press head (36) is highly suitable, can just drop into rescue work in the kind at several seconds, and promptly machine is in standing-by state.
When standing-by state will come into operation, 3 steps of manually-operated: at first by ON/OFF switch (47), next promotes machine makes press head (36) aim at patient front suitable position, press lifting on the universal wheel (49) at last, machine begins external cardiac compression automatically by the parameter of acquiescence, as to pushing parameter adjustment, then machine adapts to adjusted parameter automatically.As earlier press head (36) being aimed at the patient front,, then can stop over the rescue time of preciousness in a few second because of motor (M) starting time-delay factor again by ON/OFF switch (47).
After pressing universal wheel lifting key (49), single-chip microcomputer makes universal wheel rising solenoid (YA 1) energising, universal wheel rising display lamp (50) is bright, universal wheel solenoid directional control valve (113) spool moves to left, pressure oil is through oil pipe (112), solenoid directional control valve (113), oil pipe (114) divides two-way to 1: 2 flow divider-combiner (128) back, three/arrive left side universal wheel hydraulic cylinder cavity of resorption (13) once oil pipe (123), 2/3rds through oil pipe (124), 1: 1 flow divider-combiner (129) divide equally after respectively through oil pipe (130) to right back universal wheel hydraulic cylinder cavity of resorption (81), oil pipe (131) is to right front universal wheel hydraulic cylinder cavity of resorption (17), because of hydraulic control one-way valve (117) is in closed condition at this moment, in-line pressure is raise rapidly, control oil circuit (115) pressure raises and makes hydraulic control one-way valve (117) conducting, oil return from universal wheel left side hydraulic cylinder epicoele (12) through oil pipe (120), the right front hydraulic cylinder epicoele of universal wheel (16) is through oil pipe (122), the right back hydraulic cylinder epicoele of universal wheel (80) converges to oil pipe (118) after hydraulic control one-way valve (117) through oil pipe (121), oil pipe (116), universal wheel solenoid directional control valve (113) is to fuel tank (82), 3 universal wheel lifting hydraulic cylinder pistons (10), (14), (78) go up the moving universal wheel vehicle frame (5) of shipper pole, universal wheel (4) rises; After universal wheel (4) was liftoff, under-chassis (3) landed, and fuselage (1) is stable; After universal wheel upper limit pick off (42) detected universal wheel limit sensors block (44), single-chip microcomputer made universal wheel rising solenoid (YA 1) dead electricity, universal wheel rising display lamp (50) goes out, and universal wheel solenoid directional control valve (113) spool is got back to meta, closes universal wheel lifting oil circuit, makes simultaneously to push frame decline solenoid (YA 4) energising, it is bright to push frame decline display lamp (57), pushing frame lifting solenoid directional control valve (96) spool moves to right, pressure oil from oil pipe (95) through solenoid directional control valve (96), oil pipe (110), hydraulic control one-way valve (109), oil pipe (108) is to pushing frame lifting hydraulic cylinder epicoele (21), because the one-way check of hydraulic control one-way valve (105), in-line pressure rises rapidly, control oil circuit (111) pressure raises, hydraulic control one-way valve (105) conducting, the loop is from pushing frame lifting hydraulic cylinder cavity of resorption (22) through oil pipe (106), hydraulic control one-way valve (105), oil pipe (104) is to the one way sequence valve loop (98) of playing the effect that steadily moves down, because check valve (101), stopping of overflow valve (99), oil pipe (104), pressure in the control oil circuit (102) raises, the pretightning force that surpasses overflow valve (99), overflow valve (99) conducting, fluid from oil pipe (104) through overflow valve (99), oil pipe (97), solenoid directional control valve (96) oil sump tank (82); Push frame lifting hydraulic cylinder piston (18) move down drive push frame (23), push hydraulic cylinder (30), press head (36) descends; Single-chip microcomputer inquiry force cell (37) signal, in case detect the pressing force of press head (36) to thoracic wall, single-chip microcomputer makes immediately pushes frame decline solenoid (YA 4) dead electricity, push frame decline display lamp (57) and go out, open the program of pushing simultaneously; Push frame decline solenoid (YA 4) after the dead electricity, solenoid directional control valve (96) spool is got back to meta, push frame lifting oil circuit and close, because the lock cylinder effect of hydraulic control one-way valve (109) and hydraulic control one-way valve (105) is pushed frame (23) and can be shifted in the process of pushing.
Left side universal wheel hydraulic cylinder (6) was by 1: 2 flow divider-combiner (128), tensioning steel band (135), differential transformer (138), servo amplifier (139), low discharge servo valve (127) is formed left and right sides synchronization loop with right side two universal wheel hydraulic cylinders, one end of steel band (135) is fixed in fuselage base plate (2), the other end is fixed in draws the balance plate (136) that is parallel to fuselage base plate (2) from under-chassis (3) through being fixed in assembly pulley (137) on the universal wheel vehicle frame left and right directions pulley bracket (144), when the piston of the two universal wheel hydraulic cylinders on left side universal wheel hydraulic cylinder piston (10) and right side moves when asynchronous, after differential transformer (138) detects synchronous error, through servo amplifier (139) control electrohydraulic servo valve (127); Right front universal wheel hydraulic cylinder (7) passes through 1: 1 flow divider-combiner (129) with right back universal wheel hydraulic cylinder (8), tensioning steel band (140), differential transformer (142), servo amplifier (143), synchronization loop before and after low discharge servo valve (134) is formed, one end of steel band (140) is fixed in fuselage base plate (2), through the assembly pulley (141) that is fixed on the universal wheel vehicle frame fore-and-aft direction pulley bracket (145) other end is connected in balance plate (136), when right front universal wheel hydraulic cylinder piston (14) and right back universal wheel hydraulic cylinder piston (78) mobile asynchronous, differential transformer (142) detects synchronous error after servo amplifier (143) is controlled electrohydraulic servo valve (134); In the uphill process of universal wheel hydraulic cylinder piston, electrohydraulic servo valve (138) and electrohydraulic servo valve (142) make the in-line of leading cylinder be bled off by bypass, and the oil return line of backward cylinder is bled off from bypass, thereby guarantee accurately synchronously.
After the program of pushing is opened, single-chip microcomputer is regulated according to the needs of pushing parameter automatically to the control electric current of solenoid-operated proportional pressure (86) and solenoid-operated proportional flow valve (87), and the system pressure that pressure transducer (89) records is presented at the oil circuit flow of pushing that charactron display (76), flow transducer (88) record is presented on the charactron display (77).Pushing preceding or pushing in the process by raising key (63) by frequency, frequency downconverts key (64) is adjusted compression frequency, raise key (66) by the degree of depth, degree of depth down key (67) is to according to pressing depth setting, push accounting and raise key (69), cover than down key (70) covering than regulating, raise key (72) by pushing intensity, push intensity down key (73) and set, compression frequency charactron display (62) pushing intensity, degree of depth charactron display (65), cover than charactron display (68), pushing intensity charactron display (71) shows in real time to the parameter of setting of pushing.
Oil circuit commutation, T are pushed in employing solenoid directional control valve (92) control 1Timing begins, press head lower piezoelectric magnetic coil (YA 5), solenoid directional control valve (92) spool moves to left, the pressure oil that comes out from total oil circuit is through solenoid-operated proportional flow valve (87), oil pipe (90), solenoid directional control valve (92), oil pipe (93) is to pushing hydraulic cylinder epicoele (34), the oil return of pushing hydraulic cylinder cavity of resorption (35) is through oil pipe (94), solenoid directional control valve (92), oil pipe (91) oil sump tank (82), pushing hydraulic cylinder piston (31) moves down, drive press head (36) and push thoracic wall, per 3～the 5ms of single-chip microcomputer samples to displacement sensing (41), send bar graphic display (61) demonstration according to pressing depth with sampled result, and according to pressing depth compare with set; With identical frequency force cell (37) is sampled, send pressing force bar graphic display (60) to show the result, and compare with the set intensity of pushing; At T 1A half send demonstration 1 time from flow transducer (88) sampling; In case according to pressing depth put in place, push intensity and surpass setting value or intervalometer timing to T 1-10ms, single-chip microcomputer make press head lower piezoelectric magnetic coil (YA 5) dead electricity, solenoid directional control valve (92) resets, and piston (31), press head (36) stop to move, and to pressure transducer (89) sampling 1 time, send system pressure charactron display (76) to show; If unusual red alarm lamp (74), buzzer (75) are arranged reports to the police, control electric current reduction system pressure as force cell (37) above setting value then to send LED charactron (71) to show institute's the highest pressing force of survey and glimmer, turn down automatically solenoid-operated proportional pressure valve (86), surpass setting value 3mm as the degree of depth, then the depth capacity of being surveyed send LED charactron (65) to show and flicker, turns down the control electric current of solenoid-operated proportional flow valve (87) automatically and pushes the oil circuit flow with reduction.T 2Timing begins, and press head is replied solenoid (YA 6), solenoid directional control valve (92) spool moves to right, pressure oil enters through solenoid directional control valve (92), oil pipe (94) from oil pipe (90) and pushes hydraulic cylinder cavity of resorption (35), oil return is from pushing hydraulic cylinder epicoele (31) through oil pipe (93), solenoid directional control valve (92), oil pipe (91) oil sump tank, single-chip microcomputer is same regularly to be sampled, show, compares, at T displacement transducer (41), force cell (37) 2A half flow sensor (88) sampling 1 time and send demonstration, the degree of depth is returned to 0 or intervalometer timing to T 2-10ms, press head is replied solenoid (YA 6) dead electricity, solenoid directional control valve (92) resets.If by being pressed in T 195～100% of-10ms arrives and to require the degree of depth and at T 2Be returned to 0 or in-the 10ms at T 1Arrive in-the 10ms and require the degree of depth and at T 2-10ms 95～100% in be returned to 0, then to press down speed suitable for press head (36), flow is suitable; Both all are shorter than 95%, illustrate that press head (36) presses down excessive velocities, and flow is too big, and the control electric current of turning down solenoid-operated proportional flow valve (87) reduces pushes the oil circuit flow; If having one, can not to put in place may be underfed on time, the control electric current of heightening solenoid-operated proportional flow valve (87) is to increase flow, also may be insufficient pressure, not surpass setting value as pressing force and heighten the control electric current of solenoid-operated proportional pressure valve (86) simultaneously to increase system pressure.So go round and begin again and finish automatic external cardiac compression.
The oil circuit direction is pushed in employing motor (149) drive reversing rotary valve (146) control, before the program of pushing begins, rotary valve spool (147) is in position shown in Fig. 4-1, and oil-in (152), oil return opening (153) are blocked by spool (147), push oil circuit and are in closed condition.T 1Timing begins, Single-chip Controlling motor (149) is done clockwise stepping immediately and is rotated, driving rotary valve spool (147) clockwise rotates, make and push oil circuit and transfer the state shown in Fig. 4-2 to from closed condition, pressure oil enters the oil-in (152) of reversing rotary valve (146) to the A of grease chamber (150) from oil pipe (90), again through oil duct A (154), annular groove A (157), actuator port A (159) enters to oil pipe (93) and pushes hydraulic cylinder epicoele (34), the oil return of pushing hydraulic cylinder cavity of resorption (35) enters reversing rotary valve (146) through oil pipe (94), through actuator port B (158), annular groove B (156), oil duct B (155), the B of grease chamber (151), oil return opening (153) back is to oil return pipe (91) oil sump tank (82), press head (36) moves down since 0, motor (149) continues stepping makes the radially stifled oil section of rotary valve spool (147) at the approaching oil-in (152) of blocking, wait for the position of oil return opening (153), single-chip microcomputer is to displacement transducer (41), the sampling of force cell (37), show, relatively more identical with the mode that adopts solenoid directional control valve (92) commutation with the sampling of flow sensor (88), in case according to pressing depth put in place, pressing force transfinites, T 1Finishing motor (149) stepping immediately makes rotary valve spool (147) be in the position shown in Fig. 4-3, oil-in (152), oil return opening (153) are closed, push hydraulic cylinder piston (31), press head (36) stops to move, single-chip microcomputer is to pressure transducer (89) sampling 1 time and send demonstration, T 2Timing begins, motor (149) makes rotary valve spool be in the state shown in Fig. 4-4, pressure oil enters the B of grease chamber (151) of reversing rotary valve (146) through oil-in (152) from oil pipe (90), through oil duct B (155), annular groove B (156), actuator port B (158), oil pipe (94) is to pushing hydraulic cylinder cavity of resorption (35), the oil return of pushing hydraulic cylinder epicoele (34) is through oil pipe (93), actuator port A (159), annular groove A (157), oil duct A (154), the A of grease chamber (150), oil return opening (153), oil pipe (91) oil sump tank (82), press head (36) begins to reset, motor (149) is rotated further the stifled oil section of rotary valve spool is arrived again near oil-in (152), oil return opening (153) locate (with last time holding fix differ 180 degree angles) wait for, in case be returned to 0 or T 2Finishing motor (149) makes rotary valve spool (147) get back to original position will to push oil circuit and close.Single-chip microcomputer to the analysis of the process of pushing with adopt the basic identical of solenoid directional control valve (92), T just 1, T 2Need not subtract 10ms.The uniform rotation of when finishing the work, trying one's best of the same external cardiac compression that realizes of so going round and beginning again, the stepping rate of motor (149).
Push end, finish the program of pushing by pushing program stop key (59) single-chip microcomputer after press head (36) is returned to 0, single-chip microcomputer makes and pushes frame rising solenoid (YA subsequently 3) energising, it is bright to push frame rising display lamp (56), pushes frame lifting solenoid directional control valve (96) and makes and push frame (23) and rise, press head (36) leaves thoracic wall, as not adding intervention, to push frame (23) and will be raised to the upper limit, the time-delay certain hour is pushed frame rising solenoid (YA 3) dead electricity, as being elevated to certain position and then can making press head (36) rest on corresponding height pushing frame (23), push frame rising display lamp (56) and go out by pushing frame lifting stop key (54).
Put down key (51) by universal wheel, universal wheel decline solenoid (YA 2) energising, universal wheel decline display lamp (52) is bright, and universal wheel (4) moves down, after universal wheel (4) lands, under-chassis (3) is liftoff, universal wheel lower limit pick off (43) detects universal wheel limit sensors block (44), universal wheel decline solenoid (YA 2) dead electricity, universal wheel decline display lamp (52) goes out, and pushes machine open; By ON/OFF switch (47), machine enters standing-by state again.
As under under-chassis (3) lands state, will use the time, must be earlier by ON/OFF switch (47), put down key (51) by universal wheel again, after landing, universal wheel (4) promotes machine immediately, as the position of pushing frame (23), press head (36) is too low, then makes press head (33) arrive proper height surely by pushing frame rising key (53), with press head (36) to case people front suitable position, press universal wheel lifting key (49), machine operates by pre-set programs.

Claims (10)

1. the external cardiac compression machine of a mobile hydraulic transmission digital-control digital-display, it is characterized in that: locate fast by movable hydraulic roof, hydraulic pressure presses pressing system and the Single-chip Controlling display system constitutes, a hydraulic pump drives the hydraulic cylinder of three kinds of difference in functionalitys, the universal wheel hydraulic cylinder is used to control the relative position of universal wheel and under-chassis, so that machine moves freely on ground or fixing, install in the fuselage side and to push the frame lifting hydraulic cylinder and be used for regulating and push frame and press head height, portable quick positioning system has been formed in the flexible and location that moves down automatically of pushing frame of universal wheel, pushing hydraulic cylinder is installed in and pushes on the frame, single-chip microcomputer is pressed pre-set programs according to button and force cell, displacement transducer, limit sensors, pressure transducer, flow sensor signal control motor, solenoid directional control valve, the motor reversing rotary valve, the solenoid-operated proportional pressure valve, the solenoid-operated proportional flow valve, and then the start-stop of control hydraulic system, the lifting of universal wheel, push the frame lifting, compression frequency, the degree of depth, cover ratio, push intensity, press head presses down and answer speed, and be equipped with display lamp, charactron, bar graphic display, the residing state of alarm device display device, when the machine that is in standing-by state uses manually by the ON/OFF switch, promoting machine makes press head aim at the position, press the universal wheel lifting key, machine with regard to fast by pre-set programs with certain frequency, the degree of depth, cover ratio, press down speed and intensity and carry out automatic external cardiac compression.
2. the universal wheel hydraulic cylinder that is used to control universal wheel and under-chassis relative position according to claim 1, it is characterized in that: comprise that universal wheel and fuselage do relative position motion, under-chassis and fuselage fixed-site and universal wheel and fuselage fixed-site, under-chassis and fuselage are made the relative motion dual mode, employing universal wheel and fuselage are made the relative motion mode, the cylinder base or the piston rod of single-piston rod formula hydraulic cylinder are fixed in the fuel tank base plate, the other end links to each other with the universal wheel vehicle frame, draw under-chassis under fuselage base plate four angles, adorn a plurality of universal wheels below the universal wheel vehicle frame, respectively adorn 1 for commonly used with four jiaos, the quantity of hydraulic cylinder can be 1, also can be a plurality of, hydraulic cylinder with 3～4 same sizes, cylinder body is fixed in the fuselage base plate, piston rod connects the universal wheel vehicle frame, being equipped with corresponding flow divider-combiner and electrohydraulic servo valve composition synchronization loop is preferred version, the employing universal wheel is fixed in the fuselage mode, several (is practicality with 4) hydraulic cylinders are formed synchronization loop, when adopting single-piston rod formula hydraulic cylinder, cylinder body or piston rod can be fixed in fuselage base plate or side, the other end is drawn under-chassis downwards, when adopting the double piston-rod hydraulic cylinder, then cylinder body and fuselage side are fixed, piston rod is drawn under-chassis downwards, when making universal wheel, the universal wheel hydraulic cylinder lands, when under-chassis is liftoff, machine can move freely on ground, when the universal wheel hydraulic cylinder makes universal wheel liftoff, when under-chassis lands, machine is fixed in ground, pushes Shi Buhui and rocks.
3. according to claim 1ly be contained in that fuselage is lateral to be pushed the frame lifting hydraulic cylinder and push frame, it is characterized in that: 1～2 of hydraulic cylinder quantity, can adopt single-piston rod formula hydraulic cylinder, two solid piston rod-type hydraulic cylinders or two hollow piston rod-type, employing single-piston rod formula or two solid piston rod-type hydraulic cylinders, pushing frame links to each other with the upper end of piston rod, the two hollow piston bar hydraulic cylinders of employing, pushing frame links to each other with the hydraulic cylinder upper end, push frame and outwards rise from cantilever, push frame lifting hydraulic cylinder quantity and be 1, adorn 1 sliding sleeve in that the offside of hydraulic cylinder is parallel with it, there is slide bar to pass through in the cover, slide bar with push the frame transverse arm and link to each other, push hydraulic cylinder quantity and be 2, both form synchronization loops by the parallel fuselage offside that is loaded on.
4. the hydraulic cylinder of pushing according to claim 1, it is characterized in that: adopt single-piston rod formula or two solid piston rod-type, cylinder body is fixed in the outer end of pushing the frame cantilever, press head is loaded on piston-rod lower end, adorns 1 force cell between the two-layer plectane of press head, and press head upper strata plectane upwards draws some guide rods, from the guide rail of pushing the hydraulic cylinder sidewall or the collar, pass through, quiet sidewall that is fixed in hydraulic cylinder of displacement transducer, moving part is contained on the guide rod, can move up and down with press head.
5. motor reversing rotary valve according to claim 1, it is characterized in that: motor drives reversing rotary valve control and pushes the upper and lower cavity of hydraulic cylinder into and out of oil, reversing rotary valve changeed for 1 week or is just changeing certain angle, reversing and replying, reverse certain angle, positive reply, make press head after 0 degree of depth that is moved down into setting, press head is upwards replied again to 0, and motor can directly drive reversing rotary valve also can control reversing rotary valve by change-speed gearing.
6. according to the described button of claim 1, it is characterized in that: 16, to be that ON/OFF switch, universal wheel rise respectively strong, universal wheel puts down key, push frame rising key, push frame decline key, push frame lifting stop key, push the program initiating key, push the program stop key, frequency raises key, frequency downconverts key, the degree of depth raise key, degree of depth down key, cover than raising key, cover than down key, pushing intensity and raise key, push the intensity down key, and separately function and title adapt.
7. pick off according to claim 1, it is characterized in that: 1 universal wheel upper limit pick off, after the universal wheel rising puts in place, make universal wheel rising solenoid directional control valve coil blackout, and make and push frame decline solenoid directional control valve coil electricity, 1 universal wheel lower limit pick off, after putting in place, universal wheel decline makes universal wheel decline solenoid directional control valve coil blackout, 1 force cell detects the pressing force of press head to thoracic wall, in pushing frame decline process, when detecting press head to the pressing force of thoracic wall, it opens the external cardiac compression program automatically, 1 displacement transducer, detect the press down degree of depth of press head to thoracic wall, 1 pressure transducer detects hydraulic system pressure, 1 flow transducer detects and pushes the oil circuit flow.
8. display lamp according to claim 1, charactron, bar graphic display, alarm device, it is characterized in that: motor, the universal wheel liter, the electromagnetic switch valve coil falls, push the frame liter, show with display lamp when falling the solenoid directional control valve coil electricity, compression frequency, set according to pressing depth, push intensity, cover ratio, hydraulic system pressure, pushing the oil circuit flow shows in real time with charactron, according to pressing depth, press head shows with bar graphic display synchronously to the pressing force of thoracic wall, surpass setting value when pushing intensity, sound and light alarm when according to pressing depth surpassing capping 3mm, the red alarm lamp is bright, buzzer rings, the actual measurement pressing force or according to pressing depth maximum on charactron separately, glimmer, pass through expansion ROM, RAM, adopt LCD Chinese to show, can further strengthen the Presentation Function of machine.
9. pre-set programs according to claim 1, it is characterized in that: after the start, the press head of pushing hydraulic cylinder automatically reverts to 0, to button, corresponding processing is inquired about and made to sensor signal, the program of pushing can by by push the program initiating key or push frame when descending force cell detect press head the pressing force of thoracic wall started, system pressure, quantity adapts to compression frequency automatically, the degree of depth, cover ratio, push the isoparametric needs of intensity, when pushing intensity or according to pressing depth surpassing setting value, report to the police and also turn down solenoid-operated proportional pressure valve and solenoid-operated proportional flow valve current intensity automatically.
10. the parameter of pushing according to claim 9, it is characterized in that: frequency acquiescence 90 times/minute, the upper limit 130 times/minute, lower limit 60 times/minute, degree of depth acquiescence 45mm, upper limit 60mm, lower limit 25mm, push intensity acquiescence 45Kg, upper limit 60Kg, lower limit 10Kg, cover than acquiescence 50%, the upper limit 55%, lower limit 40% can pushed preceding or push in the process and by arrow key parameter is regulated, click, parameter is pinned then change continuously until bound to 1 unit of direction of arrow change, unclamps then to be set on the relevant parameter that charactron shows this moment midway.
CNB2003101042554A 2003-06-11 2003-10-27 Mobile type numerically controlled hydraulic external heart pressing apparatus Expired - Fee Related CN100396269C (en)

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CN03143124.0 2003-06-11
CNA031431240A CN1468592A (en) 2003-06-11 2003-06-11 Movable digitally controlled hydraulic extracorporeal heart pressing machine
CNB2003101042554A CN100396269C (en) 2003-06-11 2003-10-27 Mobile type numerically controlled hydraulic external heart pressing apparatus

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101788793A (en) * 2009-08-21 2010-07-28 河南迈松医用设备制造有限公司 Cardio-pulmonary resuscitation machine sensing control device featuring accurate regulation according to pressing depth
CN104224502A (en) * 2014-09-02 2014-12-24 于燕 External chest massaging device for upright tilt-table testing
CN109044800A (en) * 2018-06-26 2018-12-21 深圳市安保科技有限公司 Localization method, device, equipment and the storage medium of pressing plate
CN110379528A (en) * 2019-08-01 2019-10-25 岭澳核电有限公司 Display and control device applied to nuclear power station dish platform system
CN110412918A (en) * 2019-08-01 2019-11-05 岭澳核电有限公司 Display and setting device applied to nuclear power station dish platform system
CN110473454A (en) * 2018-05-11 2019-11-19 北京医模科技股份有限公司 A kind of CPR simulation press device
CN113018065A (en) * 2019-12-24 2021-06-25 沈阳恒天机器人制造股份有限公司 Adjustable human body horizontal examination bed for cancer cell imaging detection
CN114224698A (en) * 2022-01-18 2022-03-25 深圳均整沛健康管理有限公司 Uniform machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996028128A1 (en) * 1995-03-15 1996-09-19 Johns Hopkins University Improved pneumatic control system design for a cardiopulmonary resuscitation system
CN2225856Y (en) * 1995-05-08 1996-05-01 中国人民解放军海军医学高等专科学校教务部 Hydraulic multifunctional computerized human cardio-pulmonary resuscitation apparatus
CN1135327A (en) * 1995-05-08 1996-11-13 中国人民解放军海军医学高等专科学校教务部 Hydraulic multi-function computor-controlled machine for recovering heart and lung of humanbody

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101788793A (en) * 2009-08-21 2010-07-28 河南迈松医用设备制造有限公司 Cardio-pulmonary resuscitation machine sensing control device featuring accurate regulation according to pressing depth
CN101788793B (en) * 2009-08-21 2013-11-13 河南迈松医用设备制造有限公司 Cardio-pulmonary resuscitation machine sensing control device featuring accurate regulation according to pressing depth
CN104224502A (en) * 2014-09-02 2014-12-24 于燕 External chest massaging device for upright tilt-table testing
CN104224502B (en) * 2014-09-02 2016-03-16 青岛市市立医院 The outer breast of a kind of head-up tilt test is rubbed by device
CN110473454A (en) * 2018-05-11 2019-11-19 北京医模科技股份有限公司 A kind of CPR simulation press device
CN109044800A (en) * 2018-06-26 2018-12-21 深圳市安保科技有限公司 Localization method, device, equipment and the storage medium of pressing plate
CN110379528A (en) * 2019-08-01 2019-10-25 岭澳核电有限公司 Display and control device applied to nuclear power station dish platform system
CN110412918A (en) * 2019-08-01 2019-11-05 岭澳核电有限公司 Display and setting device applied to nuclear power station dish platform system
CN113018065A (en) * 2019-12-24 2021-06-25 沈阳恒天机器人制造股份有限公司 Adjustable human body horizontal examination bed for cancer cell imaging detection
CN114224698A (en) * 2022-01-18 2022-03-25 深圳均整沛健康管理有限公司 Uniform machine

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