CN102611367A - Electric control device of medical machine operated at bedside - Google Patents
Electric control device of medical machine operated at bedside Download PDFInfo
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- CN102611367A CN102611367A CN2011100299999A CN201110029999A CN102611367A CN 102611367 A CN102611367 A CN 102611367A CN 2011100299999 A CN2011100299999 A CN 2011100299999A CN 201110029999 A CN201110029999 A CN 201110029999A CN 102611367 A CN102611367 A CN 102611367A
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Abstract
The invention discloses an electric control device of a medical machine operated at a bedside, belonging to the technical field of medical apparatus and instruments. The electric control device of the medical bedside machine is characterized by being composed of a data collecting circuit module, an A/D (Analogue/Digital) conversion circuit module, a single chip microcomputer circuit module, a D/A (Digital/Analogue) conversion circuit module, a motor driving circuit module, a motion protection circuit module and a motor. When a user applies force to the data collecting circuit module, an analogue voltage signal at a ratio of the force is output. The signal is sent to the single chip microcomputer circuit module through the A/D conversion circuit module. A digital output of the single chip microcomputer circuit module is sent into the motor driving circuit module through the conversion of the D/A conversion circuit module, and finally the motor is pushed to rotate by the motor driving circuit module. When a motion state is abnormal, the motion stops and the alarming and the prompt can be carried out. The electric control device disclosed by the invention has the advantages of high reliability and strong flexibility, is mainly applied to electric control of the medical machine operated at the bedside, and can be applied to various types of movable equipment.
Description
Technical field
The invention belongs to technical field of medical instruments.
Background technology
The at present homemade medical bedside machine that is used for the X ray film making is comparatively rare, and the medical bedside machine of main flow mainly concentrates on the foreign brand names such as Canon, Tianjin, island on the market.Medical bedside machine can be divided into two kinds from movement angle: electric boosted type and on-electric assistance type, and wherein the on-electric assistance type is representative with the MUX-10J of Tianjin, island company, the motion of such type all relies on user's manpower to drive, and uses comparatively inconvenience.Electric boosted type, like the SM-50HF of SEDECAL company, the Mobile DaRt of Tianjin, island company, the DR200M of China Shenzhen Lan Yun company belongs to such type.The characteristics of the electronic aspect of this type type are advancing, retreat and turning round of bedside machine, only need the very little operational motion of user can make things convenient for, realize flexibly.
The electric controller of the medical bedside machine of assistance type can be divided into following 5 aspects substantially: sensor unit, and data processing unit, electric-motor drive unit, protected location and motor are formed.Sensor unit is used for changing user's operational motion into the signal of telecommunication; Data processing unit is accepted the output signal of sensor unit; Give electric-motor drive unit through sending control signal after the analyzing and processing; Carry out the action that the user hopes by electric-motor drive unit control motor at last, thereby realize the function of user with minimum manpower control bedside machine motion.But work as the bedside machine in motion process; Use the user to be not intended to the graphic operation signal very easily changeable; This variation is obscured with the intentional operation signal of user in particular cases easily, and this has just caused data processing unit to be difficult to judge whether this operation signal is that the user is intentional.For combining of the motion state that realizes the bedside machine and user view; Realize the high sensitivity of motion control, the electric controller of the medical bedside machine of existing assistance type uses special chip or a plurality of processors mostly on sensor unit and data processing unit.Though can realize the high sensitivity of bedside machine so preferably, can bring the difficulty of the increase and the maintenance of cost, are the such medical bedside machines of unable production for some medium-sized and small enterprises.
Summary of the invention
To the above, the present invention proposes a solution, with existing steel LOAD CELLS and support circuit as sensor unit; With the single-chip microcomputer is that core is as data processing unit; Form a kind of electric controller of medical bedside machine with the driven by Brush-Less DC motor technology of maturation as electric-motor drive unit, can satisfy various clinical practice requirements, and scheme is easy to realize; With low cost, safeguard simple.
The present invention adopts following technical scheme:
A kind of electric controller of medical bedside machine; It is characterized in that forming by data acquisition circuit module, A/D change-over circuit module, single-chip microcomputer processing circuit module, motor-drive circuit module, movement protection circuit module and motor; The simulation output of data acquisition circuit is transferred to single-chip microcomputer and is handled after the A/D circuit conversion; The output of single-chip microcomputer is connected with the input of motor-drive circuit module, and motor-drive circuit module output drive signal is used to control the running of motor to motor.
The data acquisition circuit module is made up of steel LOAD CELLS and support circuit.The steel LOAD CELLS is widely used in the intelligent electronic-scale field, and supporting manufacturer is many, and circuit is ripe.LOAD CELLS that the present invention adopted and common LOAD CELLS are had any different slightly; Common LOAD CELLS can only be accepted unidirectional application of force; And the LOAD CELLS among the present invention need be responded to the application of force of two directions opposite each other, and user's forward action is in the power F1 at sensor sensing position and act on the power F2 at sensor sensing position backward.The formation principle of LOAD CELLS is: when any type of power F in outside acts on transducer, all can cause the trickle deformation of transducer external metallization structure; The deformation people of this degree can't induce; But the bridge architecture piezo-resistance of sensor internal can induce, and is converted into the discernible signal of telecommunication of circuit.After this signal amplified shaping through support circuit, being converted into circuit can identified signal S1 and S2, and S1 is corresponding to F1, and S2 is corresponding to F2.
Because S1 and S2 are analog signal, can not directly handle for single-chip microcomputer that can only processing digital signal.Therefore must be converted into digital signal to S1 and S2 with A/D change-over circuit module.Along with the digital circuit development of integration technology, the volume of single-chip microcomputer is constantly reducing, but integrated function is more and more, wherein just comprises the A/D translation function that the present invention need use.For simplified design and saving cost, the present invention adopts and comprises 8 tunnel independence A/D passages, and the AVR series monolithic of 10 conversion accuracies is as the control core of single-chip microcomputer processing circuit module.
For the motion state that makes medical bedside machine reaches consistent with user's operation intention; The bedside machine must possess the slow function of stopping when beginning of moving and end; Must adjust motor speed at any time in the motion process; For useful life and reliability higher requirement being arranged, then be nonessential still simultaneously for concrete positional information.Got rid of the use of brush motor for the requirement of electrical machinery life, because medical bedside machine belongs to portable type, this just requires to possess energy-storage units, and existing energy-storage units is main with direct current mainly, like super capacitor, and electrokinetic cell etc.Medical bedside body product space is limited, need not accurate setting movement position, so the present invention selects for use speed adjusting technique ripe, and volume is little, the dc brushless motor of long service life.The motor-drive circuit module is a core with the PWM technology, specifically can segment down following 4 unit: modulating pulse produces circuit, chopper circuit, commutating circuit and protective circuit.The modulating pulse circuit can use the pulse-width modulation special chip, like TL494, and UC3842; MC33033 etc., the type chip can produce the pulse signal of pulse width variability according to the size of external analog voltages signal, and being got through by this pulse signal can be through the copped wave device of big electric current; This type device comprises high-power MOS tube; MOSFET, IGBT, IPM etc.Big current drive signal is added on the motor load with inertia with the state of a kind of logical (ON) and disconnected (OFF); When being added on the link with inertia according to the equal and variform burst pulse of the momentum in the sampled-data control theory; The essentially identical conclusion of its effect, the time ratio that changes the state of logical (ON) and disconnected (OFF) can be realized dc brushless motor stepless speed regulation.
PWM:Pulse Wavelength Modulation, width-modulation pulse.
Metal-oxide-semiconductor: Metal-Oxid-semiconductor, metal-oxide layer-semiconductor transistor.
MOSFET:Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide layer-semiconductor-field-effect transistor.
IGBT:Insulated Gate Bipolar Transistor, insulated gate bipolar transistor, the compound full-control type voltage driven type power semiconductor of forming by BJT (double pole triode) and MOS (insulating gate type field effect tube).
IPM:Intelligent Power Module, SPM.
The fail safe of medicine equipment be all the time be in primary, particularly like this for the medical bedside machine of this packaged type that the present invention relates to, so the protective circuit module has just seemed very necessary.The electric controller of medical bedside machine of the present invention possesses the hardware and software duplicate protection; After the movement protection inductor is triggered; Can stop the related hardware circuit function immediately, can notify scm managing system simultaneously, single-chip microcomputer can stop to transmit control signal and sending alarm immediately.
The present invention possesses the advantage of being described below:
1, transducer uses the LOAD CELLS of extensive use on the market, the one side technology maturation, and reliability is high, and buying is convenient on the other hand, is convenient to change, and satisfies requirement of mass production.
2, electric controller of the present invention, the software algorithm in the single-chip microcomputer is depended in the flexibility that motion state realizes, this just provides convenience for later upgrading.
3, dc brushless motor uses the speed governing of PWM technology, and power supply plan adopts direct current 48V electrokinetic cell, and consistent with the market mainstream, along with the upgrading and the development of correlation technique, the Continual Improvement of this motion control device is achieved.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Fig. 3 is the scm software algorithm flow chart.
Embodiment
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
As shown in Figure 1; A kind of electric controller of medical bedside machine is characterized in that being made up of data acquisition circuit module 1, A/D change-over circuit module 2, single-chip microcomputer processing circuit module 3, D/A change-over circuit module 4, motor-drive circuit module 5, movement protection circuit module 6 and motor 7.Wherein data acquisition circuit 1 is by LOAD CELLS 101; Signal processing circuit 102 is formed with signaling conversion circuit 103; Motor-drive circuit module 5 produces circuit 501 by modulating pulse; Chopper circuit 502, commutating circuit 503 is formed with protective circuit 504, and motor 7 comprises revolver motor 702 and forms with right turbin generator 701.When the user applies strength in LOAD CELLS 101 induction positions; LOAD CELLS 101 outputs one and the proportional voltage signal of this strength; This voltage signal becomes the analog signal that can discern easily after handling via signal processing circuit 102 and signaling conversion circuit 103.A/D change-over circuit module 2 is integrated in the single-chip microcomputer processing circuit module 3, so the output signal of data acquisition circuit module 1 can directly be sent into single-chip microcomputer processing circuit module 3 and handles.The numeral output of single-chip microcomputer processing circuit module 3 is sent in the motor-drive circuit module 5 after being changed by D/A change-over circuit module 4, at last by 7 runnings of motor-drive circuit module 5 output drive signal pushing motors.When motion state is not within normal range (NR), will trigger movement protection circuit module 6, stop motor 7 motions immediately, send alarm by single-chip microcomputer processing circuit module 3 simultaneously.
Like Fig. 2 is circuit theory diagrams of the present invention, and transducer and signal amplification circuit are positioned at the stressed induction of LOAD CELLS position, and quantity is two.When the user applies power F and acts on the medical bedside machine that the present invention relates to; The two-way LOAD CELLS is sensed power F1 and power F2 respectively; F1 and F2 be respective sensor output signal of telecommunication S1 and S2 respectively, and S1 and S2 get into signaling conversion circuit separately respectively after amplifying through signal amplification circuit.Because there are negative voltage in S1 and S2, this can't discern for the single-chip microcomputer treatment circuit, so the effect of signaling conversion circuit is to convert S1 and S2 into single-chip microcomputer discernible positive voltage.Concrete grammar is stack positive voltage REFA on the negative voltage basis of S1 and S2, thereby is lifted to a suitable value to the voltage integral body of S1 and S2, guarantees that the magnitude of voltage of single-chip microcomputer sampling is a positive voltage.This signaling conversion circuit is made up of LM324, and U1A and U1B and accessory circuit have been formed a voltage adder, and U1C and U1D and accessory circuit are a reverse amplification circuit, and wherein multiplication factor is adjustable.L1, C1 and C2, L2, C4 and C5 form π shape filter circuit, and S1 and S2 after amplifying are carried out filtering.
S1 and S2 send into single-chip microcomputer PA0 and PA1 mouth through behind the signaling conversion circuit corresponding to signal of telecommunication Left and Right, and this mouthful inside is integrated A/D change-over circuit, and conversion accuracy is 10.Scm software is accepted Left and the Right after the A/D conversion, differentiates and handles, and specifically software flow pattern sees for details shown in Figure 3.D/A change-over circuit module of the present invention is that core is formed with D/A chip TLC5620; The voltage control signal of single-chip microcomputer output is sent among the TLC5620 after isolating through high speed photo coupling TLP113; TLC5620 is according to the digital signal output aanalogvoltage V1 and the V2 of reference voltage REFC and single-chip microcomputer output; U4 and accessory circuit are formed voltage follower, directly send into motor-drive circuit through V1 and V2 after following.The inner dedicated PWM chip of motor-drive circuit is regulated the variable pulse of duty ratio according to this voltage, and this pulse is got through the copped wave device with the state of a kind of logical (ON) and disconnected (OFF), and big current drive signal gets in the motor thus, realizes the running of motor.
The movement protection circuit is made up of sensitive switch, is present in the mechanical anti-collision structure.When the medical bedside machine that the present invention relates to advances, to retreat or will trigger this sensitive switch when accident is run into barrier when turning round, can cut off circuit for controlling motor this moment immediately, and alarm is sent in the stop motion of bedside machine simultaneously.
Claims (5)
1. the electric controller of a medical bedside machine; It is characterized in that forming by data acquisition circuit module, A/D change-over circuit module, single-chip microcomputer processing circuit module, D/A change-over circuit module, motor-drive circuit module, movement protection circuit module and motor; The simulation output of data acquisition circuit is transferred to single-chip microcomputer and is handled after the A/D circuit conversion; The output of single-chip microcomputer is connected with the input of motor-drive circuit module after D/A change-over circuit module; Motor-drive circuit module output drive signal is used to control the running of motor to motor.
2. the electric controller of medical bedside machine as claimed in claim 1; It is characterized in that: the data acquisition circuit module is made up of LOAD CELLS circuit, signal processing circuit, signaling conversion circuit; Wherein transducer is selected the steel LOAD CELLS for use; The output signal of telecommunication is as the input of signal processing circuit, and the signal after the amplification is sent into A/D change-over circuit module through behind the signaling conversion circuit.
3. the electric controller of medical bedside machine as claimed in claim 1 is characterized in that: the single-chip microcomputer of this device is the AVR series monolithic that comprises A/D change-over circuit module.
4. the electric controller of medical bedside machine as claimed in claim 1 is characterized in that: the motor-drive circuit module is a core with the PWM speed adjusting technique.
5. like the electric controller of claim 1 and 4 described medical bedside machines, it is characterized in that: motor adopts the 48V dc brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100299999A CN102611367A (en) | 2011-01-25 | 2011-01-25 | Electric control device of medical machine operated at bedside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100299999A CN102611367A (en) | 2011-01-25 | 2011-01-25 | Electric control device of medical machine operated at bedside |
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| Publication Number | Publication Date |
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| CN102611367A true CN102611367A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100299999A Pending CN102611367A (en) | 2011-01-25 | 2011-01-25 | Electric control device of medical machine operated at bedside |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287752A (en) * | 2013-07-19 | 2015-01-21 | 南京普爱射线影像设备有限公司 | Movement control method and device used for movable type X-ray machine |
| CN106325161A (en) * | 2016-08-31 | 2017-01-11 | 柳州市通顺汽车部件有限责任公司 | Mechanical oscillation control device |
| CN112152517A (en) * | 2020-09-11 | 2020-12-29 | 德沃康科技集团有限公司 | Motor control method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07250830A (en) * | 1994-03-11 | 1995-10-03 | Hitachi Medical Corp | X-ray rotary stereoscopic photographing camera |
| JP2000023957A (en) * | 1998-07-15 | 2000-01-25 | Shimadzu Corp | X-ray diagnostic instrument |
| JP2001057794A (en) * | 1999-08-10 | 2001-02-27 | Mitsuba Corp | Motor control circuit |
| CN1709660A (en) * | 2005-06-29 | 2005-12-21 | 东南大学 | Motion control device for rehabilitation medical mechanism arm |
| CN201529222U (en) * | 2009-10-10 | 2010-07-21 | 宫相聪 | Automatic lifting control device for medical bed plate |
-
2011
- 2011-01-25 CN CN2011100299999A patent/CN102611367A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07250830A (en) * | 1994-03-11 | 1995-10-03 | Hitachi Medical Corp | X-ray rotary stereoscopic photographing camera |
| JP2000023957A (en) * | 1998-07-15 | 2000-01-25 | Shimadzu Corp | X-ray diagnostic instrument |
| JP2001057794A (en) * | 1999-08-10 | 2001-02-27 | Mitsuba Corp | Motor control circuit |
| CN1709660A (en) * | 2005-06-29 | 2005-12-21 | 东南大学 | Motion control device for rehabilitation medical mechanism arm |
| CN201529222U (en) * | 2009-10-10 | 2010-07-21 | 宫相聪 | Automatic lifting control device for medical bed plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287752A (en) * | 2013-07-19 | 2015-01-21 | 南京普爱射线影像设备有限公司 | Movement control method and device used for movable type X-ray machine |
| CN106325161A (en) * | 2016-08-31 | 2017-01-11 | 柳州市通顺汽车部件有限责任公司 | Mechanical oscillation control device |
| CN112152517A (en) * | 2020-09-11 | 2020-12-29 | 德沃康科技集团有限公司 | Motor control method and device |
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Application publication date: 20120725 |