CN203802882U - Micro guiding screw pump with magnetic resistance sensor - Google Patents
Micro guiding screw pump with magnetic resistance sensor Download PDFInfo
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- CN203802882U CN203802882U CN201420177160.9U CN201420177160U CN203802882U CN 203802882 U CN203802882 U CN 203802882U CN 201420177160 U CN201420177160 U CN 201420177160U CN 203802882 U CN203802882 U CN 203802882U
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- 238000012544 monitoring process Methods 0.000 claims description 7
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 abstract description 90
- 102000004877 Insulin Human genes 0.000 abstract description 45
- 108090001061 Insulin Proteins 0.000 abstract description 45
- 229940125396 insulin Drugs 0.000 abstract description 45
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 abstract description 7
- 239000008103 glucose Substances 0.000 abstract description 7
- 239000008280 blood Substances 0.000 abstract description 5
- 210000004369 blood Anatomy 0.000 abstract description 5
- 238000001802 infusion Methods 0.000 abstract 2
- 238000007726 management method Methods 0.000 description 9
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- -1 and pump suspends Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
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Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a micro guiding screw pump with a magnetic resistance sensor. The micro guiding screw pump can monitor rotation of a guiding screw through the magnetic resistance sensor and a MCU and can control and feed back the turning direction and speed of the guiding screw through a motor controller, so that the infusion speed to a patient can be controlled. Furthermore, the micro guiding screw pump can control the insulin infusion speed according to the blood glucose concentration of the patient monitored by a CGM. The micro guiding screw pump has the advantages of being high in flexibility, high in reliability, low in power consumption, low in cost and convenient to use.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically, relates to a kind of insulin pump being driven by miniature driving screw pump.
Background technology
Along with the quantity increase of diabetes patient in global range, the demand of insulin pump is also increasing.Insulin pump need be injected constantly basic dosage insulin or inject heavy dose of insulin to correct the too high situation of blood glucose after meal according to diabetes human needs.Because insulin pump can be according to diabetes patient's basic dose distribution map insulin injection, so the blood sugar concentration in patient blood more can keep par, patient's organ bears less pressure.Also because of aforesaid reason, insulin pump must be injected low dose of insulin (about 0.1-1.0cm continuously
3/ day), and, can in wider scope, adjust the speed (being basic dosage speed and heavy dose of speed) of injecting, to be suitable for patient's difference needs.Just because of this, on market, a lot of insulin pumps is to use miniature driving screw pump to drive; By miniature driving screw pump drive sleeve, in reservoir, moved, in the insulin input patient body in reservoir.Wherein, the motor of rotation driving screw is the motor that can accurately control rotating speed.Using the cost of motor is on the one hand the high price of insulin pump, and the price of an insulin pump can be up to 5000 dollars, and it has greatly limited patient's use.On the other hand, the number of phases and umber of beats that the precision of the control transfusion speed of motor depends on, the number of phases and umber of beats are more, and its precision is higher; Motor is prone to low-frequency vibration phenomenon when low speed; Start the too high or excessive phenomenon of easily losing step or occurring stall of load of frequency, the too high overshoot phenomenon that is prone to of rotating speed while stopping.In order to reduce the price of insulin pump, thereby the present invention uses magneto-resistor angular sensor and replaces motor together with DC motor, and the cost of the insulin pump having reduced, has improved insulin pump performance.
Summary of the invention
This utility model is the insulin pump about being driven by miniature driving screw pump, it has used magneto-resistor angular sensor and Continuous glucose monitor(CGM, continuous blood sugar monitor), coordinate Micro Control Unit(MCU, microcontroller) feedback control transfusion speed, has replaced the mode of controlling transfusion speed with stepper motor.This utility model can be used other motor to replace stepper motor, also can use together with stepper motor, has improved precision and the reliability of the transfusion speed of insulin or other liquid.
A kind of miniature driving screw pump, be installed in pump box, described miniature driving screw pump comprises motor-driven driving screw and the driving head being connected with described driving screw, described driving screw rotates in the nut that has the screw thread reverse with the screw thread of driving screw, thereby drive described driving head to promote sleeve moves in reservoir, it is characterized in that, also comprise
At least one permanent magnet with described driving screw coaxial rotation;
Can respond to the magneto-resistor angular sensor in the magnetic field that described at least one permanent magnet produce, and the magnetic field that produces at least one permanent magnet of described magneto-resistor angular sensor is unidirectional and zone of saturation in;
Receive the signal of described magneto-resistor angular sensor and control according to the signal feedback of described magneto-resistor angular sensor the MCU with speed that turns to that described motor rotates described driving screw.
Preferably, described magneto-resistor angular sensor is a kind of in the single-shaft-rotation sensor, single shaft of twin shaft rotary magnetic sensor, two quadratures or the linear Magnetic Sensor of twin shaft.
Preferably, described magneto-resistor angular sensor is AMR, GMR or TMR sensor.
Preferably, the central axis of described permanent magnet and the central axis of described driving screw are through the center of described magneto-resistor angular sensor.
Preferably, described at least one permanent magnet is an integral type permanent magnet or Separated permanent magnetic body, is disc, annular or square.
Preferably, described at least one permanent magnet is two permanent magnets, and every described permanent magnet has different a plurality of magnetic poles, and described two permanent magnets lay respectively at the two ends of driving screw or same one end that bunchiness is positioned over described driving screw.
Preferably, described MCU turning to and rotating speed by motor described in motor controller controls.
Preferably, described magnetic resistance sensor information management unit comprises the counting unit of the motor anglec of rotation of the monitoring motor anglec of rotation, calculate the driving screw position units of traveling priority position and/or the sleeve position units of the position of calculating sleeve in reservoir of driving screw, calculate the liquor capacity unit of the volume of solution in reservoir, the velocity of rotation of described driving screw is converted to the magnetic resistance sensor information management unit of the transfusion speed of described reservoir.
Preferably, described MCU has wired and/or RFDC interconnecting function.
Preferably, described MCU receives the signal that coupled CGM sends, and calculates actual required transfusion speed according to the CGM question blank being preset in described MCU.
Preferably, comprise the comparing unit of the transfusion speed that the transfusion speed of more described miniature driving screw pump and described reality are required, described MCU adjusts the velocity of rotation of described driving screw according to the data feedback of the comparison of described comparing unit.
Preferably, described motor is DC motor or motor.
Preferably, comprise the actuating device that connects described motor and described driving screw.
Preferably, comprise slideway or guide post, described slideway or guide post are parallel to described driving screw, and described driving head slides or slides along described guide post in described slideway.
Preferably, comprise antibacklass device, it is positioned on described driving screw.
Due to according to this utility model, can not use expensive stepper motor, and use common DC motor, therefore reduced the cost of insulin pump.In addition, the application of the magneto-resistor angular sensor of low-power consumption also can reduce the power consumption of insulin pump, reduces the frequency of charging, and this is an important improvement to normally battery-powered insulin pump, has facilitated use.To sum up, insulin pump of the present utility model has high sensitivity, high reliability, low-power consumption, feature low-cost and easy to use.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model.In order to be illustrated more clearly in technological means of the present utility model, and can be according to Content Implementation this utility model of description, below in conjunction with embodiment and coordinate accompanying drawing to explain this utility model.The specific embodiment of the present utility model is at length provided by following examples.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of insulin pump;
Fig. 2 is permanent magnet and direction of magnetization schematic diagram thereof;
Fig. 3 is MCU control principle drawing;
Fig. 4 is magnetic resistance sensor information management unit schematic diagram;
Fig. 5 is inversion cuver.
The specific embodiment
Fig. 1 is the schematic top plan view of miniature driving screw pump or insulin pump 2.It comprises motor 52, the driving screw 22 being driven by motor 52 and driving head 18, and it is installed in pump box 15.Pump box 15 has lid 35.Reservoir 4 have one can be mobile therein sleeve 8.Lock interface 3(Luer lock) connect the interface 5 of reservoir 4 and tube for transfusion, the interface 5 of tube for transfusion is connected to the flexible pipe of defeated insulin in patient body.
It is upper that one end that driving screw 22 connects motor 52 is rotatably mounted to front pedestal 16A, and the other end is rotatably mounted on rear pedestal 16B.In order to drive driving head 18, thereby driving screw 22 is connected to the translation that on driving head 18, its rotation is converted to driving head 18 by trace 61, and rotation in the nut 7 of the female thread that can match at the external screw thread having with driving screw 22.Nut 7 is fixed on pump box 15.Motor 52 is by changing the mechanical driving device of rotary speed, comprise one or more reduction gearing 13 and gear 31, drive the positive hour hands of driving screw 22 or inhour rotates in nut 7, thereby driving screw 22 drives driving head 18 linearly repeatedly to move along the direction parallel with slideway 17.Slideway 17 is the grooves that allow driving head 18 to slide therein, and it is parallel to driving screw 22.At motor 52, reduction gearing 13, between gear 31, in order to reduce costs, also can be used pulley and driving-belt to replace gear 31 and reduction gearing 13.Antibacklass device 19 is arranged on driving screw 22 and prevents that backlash from moving about.
Also can not use slideway 17, and adopt guide post to play stable and guide effect, this guide post is parallel to driving screw 22.The guide post that plays Stabilization can be one, can be also a plurality of.
Motor 52 can be direct current generator, alternating current generator, and motor, or servomotor etc.
Insulin pump 2 also comprise magneto-resistor angular sensor 28 and with at least one permanent magnets 30 of driving screw 22 coaxial rotatings, magneto-resistor angular sensor 28 transfixions also can be responded to the magnetic field that permanent magnet 30 produces.
On driving head 18, there is the reservoir 4 of a pair of fixedly different-diameter to be positioned at the reservoir clip 14 on same or not same syringe central axis, in order to hold sleeve 8, so, when driving screw 22 rotates in nut 7, driving head 18 linearly moves along the direction of slideway 17, thereby promote sleeve 8, in reservoir 4, moves.On pump box 15, be provided with a pair of syringe clip 12 fixedly the reservoir 4 of different-diameter be positioned on same or not same syringe central axis.
Fig. 2 A is magneto-resistor angular sensor 28 and the position relationship generalized section of permanent magnet 30 and the direction of magnetization schematic diagram that Fig. 2 B-D is permanent magnet 30.Driving screw 22 has a major axis 100, and its direction is Z-direction, perpendicular to XY plane, and through permanent magnet 30 center, and coaxial with permanent magnet 30.The central axis of the central axis of permanent magnet 30 and driving screw 22 is through magneto-resistor angular sensor 28 center.Magneto-resistor angular sensor 28 is single-shaft-rotation sensors of twin shaft rotary magnetic sensor or two quadratures, can be also a linear transducer or twin shaft linear transducer.Magneto-resistor angular sensor 28 is AMR, GMR, or TMR sensor.Fig. 2 B, 2C and 2D have shown and have partly been applicable to permanent magnet of the present utility model.Permanent magnet 30 be shaped as disc, annular or square, it is an integral type permanent magnet or split permanent magnet; Permanent magnet 30 can be also two, and every permanent magnet has a plurality of magnetic poles of different numbers.Magneto-resistor angular sensor 28 is less than at the surface area of XY plane the area that described permanent magnet 30 covers in XY plane.Permanent magnet 30 is magnetized along diameter or diagonal, and its direction of magnetization is perpendicular to the long axis direction of Z-direction or driving screw 22.Disc, annular permanent magnet are magnetized along diametric(al), and square permanent magnet is magnetized along diagonal.Permanent magnet 30 can be positioned on driving screw 22 away from motor 52 one end, also can be with motor 52 in same one end.If permanent magnet 30 is two, two permanent magnets lay respectively at the two ends of driving screw 22 or same one end that bunchiness is positioned over driving screw 22.Permanent magnet 30 can be positioned near magneto-resistor angular sensor 28, also can be away from.If two permanent magnet bunchiness are positioned over same one end of driving screw 22, magneto-resistor angular sensor 28 can be positioned near driving screw also can be away from.Magneto-resistor angular sensor 28 is positioned at unidirectional and zone of saturation, the magnetic field of permanent magnet 30.
Fig. 3 is the control principle drawing of MCU 50.Insulin pump 2 comprises MCU 50, and it receives signal from magneto-resistor angular sensor 28, and controls turning to and speed of motor 52 by coupled electric machine controller/motor control unit 48.In addition, MCU 50 also with operation keyboard 56, display 60 is connected with battery 64.Display screen 60 and keyboard 56 are positioned on lid 35.
Electric machine controller 48 is also for monitoring the output signal of magneto-resistor angular sensor 28, if find predefined sleeve position and transfusion speed, electric machine controller 48 will excite coupled siren 54.
MCU 50 is presented at the information that needs insulin pump 2 user to know on display screen 60.User also can exchange with insulin pump 2 by the keyboard connected with MCU50 56.MCU50 is connected 51 with force transducer, and force transducer 51 can detect the power putting on reservoir 4, and when this power surpasses setting value, force transducer 51 will excite siren 54 by electric machine controller 48.The modular design of force transducer 51 is bridge architectures, uses analogue signal-digital signal conversion (ADCs) and the programmable gain of difference to amplify input or ADCs and for the external difference instrument amplification of Signal Regulation.
Battery 64 provides electric elements and the required electric power of motor 52.Electric weight demonstration depends on simple cell voltage or temperature sensor 27.The reading of voltage or temperature is at ADC 23 digitizeds.MCU 50 will receive these data of Data Post after digitized and use the question blank prestoring to determine remaining electric weight.Electric weight is presented on display screen 60; When electric weight is too low, siren 54 will give the alarm.
The power management unit 66 being connected with battery 64 is being turned off supply of electric power or when insulin pump 2 is not used, is being converted thereof into the state of low-power consumption.
In the system of multivoltage, the method that produces the most simply power-on reset signal is watchdog logic power supply.When powering on, logic voltage rises to the threshold value higher than it, and the multi-voltage monitoring reset house dog 59 being connected with power management unit 66 starts reseting stage, guarantees to open in order MCU50.As long as the voltage of the power supply of main frame is in the specification of regulation, multi-voltage monitoring reset house dog 59 continues to detect supply of electric power problem or the power failure of any possibility short time.On market, existing multi-voltage monitoring reset house dog 59 can be monitored two, and three, four supply voltages even.
When user input message, should there be vision or audible signal.Display screen 60 provides dosage and the transfusion speed of insulin, remaining electric weight, time and date, the alarm of prompting and system (i.e. obstruction or residue amount of insulin are low).Display screen 60 also can provide the information of testing oneself when powering on.Sound is broadcast device 33 must self-test function, and this self-test function can, by indirectly monitoring the impedance of Microspeaker or putting a microphone on Microspeaker side, be accepted sound, to confirm that sound is in suitable level.Broadcast autoenlarging apparatus 35 that device 33 is connected for adjusting volume with sound.Display screen 60 can be touch screen; If display screen 60 is touch screens, it is preferably placed in the inner side of lid 35.
Insulin pump 2 requirements, when finding mistake, official hour to or any event that needs alarm while occurring, vision and audible alarm are provided.Siren 54 can be reported to the police when following event occurs: electric weight is low, and battery is not worked, and amount of insulin is low, in insulin bottle, without insulin, has surpassed the amount of insulin, and pump suspends, and air pump inoperative (can have a lot of different situations), stops up etc.The single led running status that also can be used for showing insulin pump 2, redness is undesired, green is normal.
Electrostatic protection 37 is by having electronic installation or the protection of Electrostatic Discharge line of built-in protection to realize.
FPDP 39 allows data to shift and downloads upgrade software, and it also allows history file to be input to application software, so that doctor helps treatment.
Wired and/or RFDC interconnect module can also be set in MCU 50.Clock source 53 and radio link 55 are accepted the data of concentration of glucose in patient body from CGM 45.If used CGM45, can use bluetooth ISM-band acknowledge(ment) signal.CGM 45 provides concentration of glucose in patient body.MCU 50 is preset CGM question blank, provides the inquiry of concentration of glucose and insulin input speed in patient body.MCU50 receives the signal that coupled CGM45 sends, and calculates actual required transfusion speed according to the CGM question blank being preset in MCU50.MCU 50 has comparing unit 47.MCU50 converts the velocity of rotation of driving screw 22 to insulin transfusion speed, on 47 comparison islets of langerhans transfusion speeds of comparing unit and CGM question blank, according to the required transfusion speed of reality of the concentration of glucose regulation in patient body, MCU 50 adjusts the velocity of rotation of described driving screw 22 according to result relatively.
Multiplexer (multiplexer or mux) 25 is for selecting to be input to the signal of ADC 23.
Real-time clock (real-time clock, RTC) 68 variations for real time record and program, also for giving the correct time and writing time.
The device no matter system is installed, the fluctuation of supply of electric power, variations in temperature, time lapse, how VREF21 provided fixing voltage.
The upper limit of electric current is used in current limiter 33 restrictions that are connected with MCU 50, to prevent short circuit or similarly problem generation.The level translator 29 connected from MCU 50 is for using the element of different voltages that transition interface is provided.Memory card 46 is the data storage devices for the electronics flash memory of current limiter 33 and level translator 29.
When using motor, except motor 52 self has the function that regulates motor speed, MCU50 can also further pass through electric machine controller 48, and the speed according to the signal feedback regulation and control motor 52 of magneto-resistor angular sensor 28, can make the speed of transfusion more accurate thus.
Fig. 4 has shown the principle of the magneto-resistor angular sensor information management unit 49 in MCU 50.The motor rotating cycle counting unit 66 that magneto-resistor angular sensor information management unit 49 comprises, driving screw position units 70, sleeve position units 74, liquor capacity unit 68 and flow velocity unit 72, and the transfusion volume of preset reservoir 4 and the conversion table of the position of sleeve 8 in reservoir 4 are, the calculation procedure of conversion table, driving screw 22 rotating cycles and driving screw 22 positions of the position of the sleeve 8 of reservoir 4 in reservoir 4 and driving screw 22 positions.
When using insulin pump 2, be necessary it to calibrate.MCU 50 can be used in calibration insulin pump 2, and can calculate volume and the speed of transfusion.Driving screw 22 rotates, and sleeve 8 moves thereupon, and according to the signal of magneto-resistor angular sensor 28, motor rotating cycle counting unit 66 records the number of turns and the time that driving screw 22 rotates.The number of turns of being rotated by driving screw 22 and be preset at driving screw 22 rotating cycles in MCU50 and the calculation procedure (algorithm) of driving screw 22 positions,
The distance of driving screw traveling priority=(anglec of rotation) * (longitudinal leadscrew pitch)
Driving screw position units 70 just can be calculated the position of driving screw 22 or the air line distance that it moves in Z-direction; Meanwhile, by the conversion table of position and the position of sleeve 8 in reservoir 4 of driving screw 22, sleeve position units 74 can be known the position of sleeve 8 in reservoir 4; Further, liquor capacity unit 68, can be known by the diameter of reservoir 4 and the conversion table of its position of sleeve 8 in reservoir 4 volume or the remaining liquid volume of transfusion; Flow velocity unit 72, according to the volume of aforesaid transfusion and time, can calculate the speed of transfusion.If preset driving screw 22 rotating cycles and the conversion table of transfusion volume of reservoir 4, flow velocity unit 72 just can record the number of turns and the time that driving screw 22 rotates according to this conversion table and motor rotating cycle counting unit 66, calculates quickly the speed of transfusion.When transfusion speed too high or too low depart from when setting value, MCU50 can adjust turning to and speed of motors 52 by indication motor controller 48.The position of the sleeve 8 providing according to sleeve position units 74 in reservoir 4, or according to the data of the transfusion volume of liquor capacity unit 68, MCU 50 can adjust turning to and speed of motor 52 by indication motor controller 48.
The calibration process of insulin pump 2: empty reservoir 4 is placed on syringe pump 2, by magneto-resistor angular sensor information management unit 49, record magnetic resistance sensor 28 and detect the position of sleeve 8 in reservoir 4, then, the liquid that adds known volume in reservoir 4, and this volume numerical value is input in MCU 50, magneto-resistor angular sensor information management unit 49 just can obtain position relationship in reservoir 4 of liquid volume and sleeve 8 and with the relation of driving screw 22 positions, calculate calibration parameter.
Fig. 5 is the transformation curve of magneto-resistor angular sensor 28.When permanent magnet 30 is along with driving screw 22 during along direction of rotation 101 rotation, the detected X-axis of magneto-resistor angular sensor 28 and Y-axis magnetic-field component with the change curve of the anglec of rotation respectively as shown in the curve 41 and 42 in Fig. 4.The magnetic field amplitude that magneto-resistor angular sensor 28 produces permanent magnet 30 is converted into analog voltage signal, and resulting analog voltage signal can directly be exported, and also can after converting digital signal to by analog-to-digital conversion circuit (ADC), export.According to the signal of output, just can learn the anglec of rotation of permanent magnet 30, be also the anglec of rotation of driving screw 22.
The manufacture method of above-mentioned miniature driving screw pump/insulin pump 2 is summarized as: by least one permanent magnet 30 be arranged on driving screw 22, make its can with driving screw 22 coaxial rotation, and the position installation magneto-resistor angular sensor 28 in the unidirectional and zone of saturation in the magnetic field producing at least one permanent magnet 30; The MCU50 with speed that turns to that controls motor 52 rotation driving screws 22 according to the signal feedback of magneto-resistor angular sensor 28 is installed again.
The foregoing is only preferred embodiment of the present utility model; be not limited to this utility model; for a person skilled in the art; this utility model can have various modifications and variations; enforcement in this utility model also can be carried out various combination variation; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (15)
1. a miniature driving screw pump, be installed in pump box, described miniature driving screw pump comprises motor, described motor drives driving screw and the driving head being connected with described driving screw, described driving screw rotates in the nut that has the screw thread reverse with the screw thread of driving screw, thereby drive described driving head to promote sleeve, in reservoir, move, it is characterized in that, also comprise
At least one permanent magnet with described driving screw coaxial rotation;
Can respond to the magneto-resistor angular sensor in the magnetic field that described at least one permanent magnet produce, and the magnetic field that produces at least one permanent magnet of described magneto-resistor angular sensor is unidirectional and zone of saturation in;
Receive the signal of described magneto-resistor angular sensor and according to the signal feedback of described magneto-resistor angular sensor, control the MCU with speed that turns to of described driving screw.
2. miniature driving screw pump according to claim 1, is characterized in that, described magneto-resistor angular sensor is a kind of in the single-shaft-rotation sensor, single shaft of twin shaft rotary magnetic sensor, two quadratures or the linear Magnetic Sensor of twin shaft.
3. miniature driving screw pump according to claim 1, is characterized in that, described magneto-resistor angular sensor is AMR, GMR or TMR sensor.
4. miniature driving screw pump according to claim 1, is characterized in that, the central axis of described permanent magnet and the central axis of described driving screw are through the center of described magneto-resistor angular sensor.
5. according to arbitrary described miniature driving screw pump of claim 1 to 4, it is characterized in that, described at least one permanent magnet is an integral type permanent magnet or Separated permanent magnetic body, is disc, annular or square.
6. according to the arbitrary described miniature driving screw pump of claim 1 to 4, it is characterized in that, described at least one permanent magnet is two permanent magnets, every described permanent magnet has different a plurality of magnetic poles, and described two permanent magnets lay respectively at the two ends of driving screw or same one end that bunchiness is positioned over described driving screw.
7. miniature driving screw pump according to claim 1, is characterized in that, described MCU turns to and rotating speed by motor described in motor controller controls.
8. miniature driving screw pump according to claim 7, it is characterized in that, described magnetic resistance sensor information management unit comprises the motor anglec of rotation counting unit of the monitoring motor anglec of rotation, calculate the driving screw position units of traveling priority position and/or the sleeve position units of the position of calculating sleeve in reservoir of driving screw, calculate the liquor capacity unit of the volume of solution in reservoir, the velocity of rotation of described driving screw is converted to the magnetic resistance sensor information management unit of the transfusion speed of described reservoir.
9. according to the miniature driving screw pump described in claim 1 or 7, it is characterized in that, described MCU has wired and/or RFDC interconnecting function.
10. according to the arbitrary described miniature driving screw pump of claim 1,7 or 8, it is characterized in that, described MCU receives the signal that coupled CGM sends, and calculates actual required transfusion speed according to the CGM question blank being preset in described MCU.
11. miniature driving screw pumps according to claim 10, it is characterized in that, the comparing unit that comprises the transfusion speed that the transfusion speed of more described miniature driving screw pump and described reality are required, described MCU adjusts the velocity of rotation of described driving screw according to the data feedback of the comparison of described comparing unit.
12. miniature driving screw pumps according to claim 1, is characterized in that, comprise that described motor is DC motor or motor.
13. miniature driving screw pumps according to claim 1, is characterized in that, comprise the actuating device that connects described motor and described driving screw.
14. miniature driving screw pumps according to claim 1, is characterized in that, comprise slideway or guide post, and described slideway or guide post are parallel to described driving screw, and described driving head slides or slides along described guide post in described slideway.
15. miniature driving screw pumps according to claim 1 is characterized in that, comprise antibacklass device, it is positioned on described driving screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177160.9U CN203802882U (en) | 2014-04-14 | 2014-04-14 | Micro guiding screw pump with magnetic resistance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177160.9U CN203802882U (en) | 2014-04-14 | 2014-04-14 | Micro guiding screw pump with magnetic resistance sensor |
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Cited By (7)
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| CN103920207A (en) * | 2014-04-14 | 2014-07-16 | 江苏多维科技有限公司 | Miniature guiding screw pump comprising magnetic resistance transducer and manufacturing method for miniature guiding screw pump |
| CN106267444A (en) * | 2016-07-23 | 2017-01-04 | 河南驼人医疗器械集团有限公司 | A kind of infusion system morphine pump |
| CN106730129A (en) * | 2016-12-22 | 2017-05-31 | 郑州万辉医疗设备有限公司 | A kind of insulin pump with Bluetooth connected mode |
| CN107812277A (en) * | 2017-09-15 | 2018-03-20 | 中国电子科技集团公司第四十研究所 | A kind of device of the accurate control syringe pump amount of infusion based on closed loop feedback |
| US10238793B2 (en) | 2014-02-20 | 2019-03-26 | Multidimension Technology Co., Ltd | Precision syringe pump and manufacturing method thereof |
| CN110430905A (en) * | 2017-01-25 | 2019-11-08 | 生物合作制造公司 | The dosage control system and its application method of injectable drug conveying device |
| CN114555151A (en) * | 2019-09-27 | 2022-05-27 | 西医药服务以色列有限公司 | Multi-rate drug delivery device and method of controlling the same |
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| US10238793B2 (en) | 2014-02-20 | 2019-03-26 | Multidimension Technology Co., Ltd | Precision syringe pump and manufacturing method thereof |
| CN103920207A (en) * | 2014-04-14 | 2014-07-16 | 江苏多维科技有限公司 | Miniature guiding screw pump comprising magnetic resistance transducer and manufacturing method for miniature guiding screw pump |
| WO2015158230A1 (en) * | 2014-04-14 | 2015-10-22 | 江苏多维科技有限公司 | Micro guiding screw pump using magnetic resistance sensor and manufacturing method therefor |
| US10232109B2 (en) | 2014-04-14 | 2019-03-19 | MultiDimension Technology Co., Ltd. | Mini lead screw pump utilizing a magnetoresistive sensor and manufacturing method thereof |
| CN106267444A (en) * | 2016-07-23 | 2017-01-04 | 河南驼人医疗器械集团有限公司 | A kind of infusion system morphine pump |
| CN106730129A (en) * | 2016-12-22 | 2017-05-31 | 郑州万辉医疗设备有限公司 | A kind of insulin pump with Bluetooth connected mode |
| CN110430905A (en) * | 2017-01-25 | 2019-11-08 | 生物合作制造公司 | The dosage control system and its application method of injectable drug conveying device |
| CN107812277A (en) * | 2017-09-15 | 2018-03-20 | 中国电子科技集团公司第四十研究所 | A kind of device of the accurate control syringe pump amount of infusion based on closed loop feedback |
| CN114555151A (en) * | 2019-09-27 | 2022-05-27 | 西医药服务以色列有限公司 | Multi-rate drug delivery device and method of controlling the same |
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