CN110478566A - A kind of syringe pump - Google Patents
A kind of syringe pump Download PDFInfo
- Publication number
- CN110478566A CN110478566A CN201810029958.1A CN201810029958A CN110478566A CN 110478566 A CN110478566 A CN 110478566A CN 201810029958 A CN201810029958 A CN 201810029958A CN 110478566 A CN110478566 A CN 110478566A
- Authority
- CN
- China
- Prior art keywords
- guide rod
- pilot hole
- magnet
- displacement
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M2005/14208—Pressure infusion, e.g. using pumps with a programmable infusion control system, characterised by the infusion program
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
Abstract
A kind of syringe pump, comprising: pedestal；Motor on the pedestal, syringe tube briquetting, three X are mounted on to parallel guide rod；By the motor-driven lead screw；Syringe handle assemble mechanism, there are three pilot hole, a syringe handle limiting slot and a drive holes for tool；The guide rod and the pilot hole cooperatively form sliding pair；Magnet is housed on guide rod or pilot hole hole wall；The magnet coil is connected with guide rod bias amount control circuit；Eccentric amount control circuit contains displacement detecting circuit, which is converted to control signal by the controller being connected with displacement detecting circuit, the drive magnet after power amplifier amplifies, and realizes automatic centering of the guide rod in pilot hole hole wall.The medicine have the advantages that structure is simple, guiding accuracy is high, reduces vibration and noise, reduces the abrasion of guide rod and pilot hole hole wall, reduces maintenance cost.
Description
Technical field
The present invention relates to a kind of syringe pumps, more particularly to one kind to realize that guide rod is fixed in pilot hole hole wall by magnetic suspension
The syringe pump of the heart.
Background technique
Friction pair between existing syringe pump guide rod and pilot hole hole wall is direct contact type, pilot hole hole wall with
Between guide rod there are gap, in motion process, pilot hole hole wall and guide rod are prone to bias, and guiding accuracy is lower,
Vibration and noise is larger.
Summary of the invention
The present invention mainly solves in syringe pump, and pilot hole hole wall and guide rod are prone to bias, and guiding accuracy is lower,
The biggish deficiency of vibration and noise, to develop a kind of syringe pump of guide rod automatic centering in pilot hole hole wall.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: a kind of syringe pump, comprising:
Pedestal；Motor on the pedestal, syringe tube briquetting, three X are mounted on to parallel guide rod；By described motor-driven
Lead screw；Syringe handle assemble mechanism, there are three pilot hole, a syringe handle limiting slot and a drive holes for tool；The silk
Thick stick and the drive hole cooperatively form lead screw pair, and the guide rod and the pilot hole cooperatively form sliding pair；Described three are led
On three vertex for being located at equilateral triangle to the center in hole, the center of the drive hole is located at the center of the equilateral triangle
Position, the symmetry axis of the syringe handle limiting slot are overlapped with the Z-direction middle line of the equilateral triangle；
Several magnet are housed on guide rod or pilot hole hole wall；The magnet coil and guide rod bias amount control circuit phase
Connection；Eccentric amount control circuit contains displacement detecting circuit, and the controller being connected with displacement detecting circuit turns the displacement signal
It is changed to control signal, the drive magnet after power amplifier amplifies controls guide rod displacement.
Using the above scheme, guide rod self-centering in pilot hole hole wall is realized by magnetic suspension, structure is simple, guiding
Precision is high, reduces vibration and noise, reduces the abrasion of guide rod and pilot hole hole wall, reduces maintenance cost.
Preferably, displacement detecting circuit include several arrangements on the guide bar or the sensor on pilot hole hole wall,
The displacement signal of sensor output is input to controller after displacement conversion circuit transformation, is converted into control signal by controller,
The drive magnet after power amplifier amplifies controls guide rod displacement.Guide rod is detected using sensor in this programme
Relative to the displacement of pilot hole hole wall, guide rod self-centering in pilot hole hole wall is realized.
Preferably, displacement detecting circuit is used as test signal using pulse-width signal, tests in signal and be loaded with displacement
Information is input to controller after transformed, which is converted to control signal by controller, after power amplifier amplifies
Drive magnet controls guide rod displacement.In the present solution, sensor is not used, using pulse-width signal as test
Signal extracts displacement information from test signal, realizes guide rod self-centering in pilot hole hole wall.
Preferably, displacement detecting circuit is by band-pass circuit, level-one amplifying circuit, differential detection circuit, demodulator circuit, low
Bandpass filter circuit successively forms, and displacement detecting circuit is using high frequency small-signal as test signal.In the present solution, not using sensing
Device extracts displacement information from test signal using high frequency small-signal as test signal, realizes guide rod in pilot hole hole wall
Middle self-centering.
Preferably, magnet is arranged symmetrically on guide rod or pilot hole hole wall.Between guide rod and pilot hole hole wall
Radial forces autobalance realizes guide rod self-centering in pilot hole hole wall.
Preferably, being equipped with bracket on pilot hole hole wall, the magnet is rack-mount.By bracket to magnetic circuit into
Row optimization.
Preferably, the magnet is electromagnet, electromagnet dress on the guide bar, on pilot hole hole wall with electromagnetism
Permanent magnet is housed on the corresponding position of iron.The permanent magnet is bar shaped.The direction of bar permanent magnet and guide rod are relative to leading
The direction of motion to hole hole wall is consistent.By changing the change of flux magnetic force of electromagnet, realize guide rod in pilot hole hole wall
Middle self-centering；When being not easy to installation electromagnet on pilot hole hole wall, on the guide bar by electromagnet dress, on pilot hole hole wall
Permanent magnet is housed on position corresponding with electromagnet, realizes guide rod self-centering in pilot hole hole wall.
Preferably, there is axially extending bore on the guide rod, the conducting wire of electromagnet passes through from through-hole.Avoid conducting wire from leading
Conducting wire and pilot hole hole wall collide when drawing outside to bar, the service life of extension lead.
Preferably, the magnet is electromagnet, the electromagnet on the pilot hole hole wall, on the guide bar with electromagnetism
Permanent magnet is housed on the corresponding position of iron.The permanent magnet is bar shaped.The direction of bar permanent magnet and guide rod are relative to leading
The direction of motion to hole hole wall is consistent.By changing the change of flux magnetic force of electromagnet, realize guide rod in pilot hole hole wall
Middle self-centering；When being not easy to installation electromagnet on guide rod, by electromagnet on the pilot hole hole wall, on the guide bar with electricity
Permanent magnet is housed on the corresponding position of magnet, realizes guide rod self-centering in pilot hole hole wall.
Therefore, real the medicine have the advantages that being controlled by guide rod bias amount control circuit guide rod displacement
Existing automatic centering of the guide rod in pilot hole hole wall, structure is simple, and guiding accuracy is high, reduces vibration and noise, reduces
The abrasion of guide rod and pilot hole hole wall, reduces maintenance cost.
Detailed description of the invention
Attached drawing 1 is a kind of structural schematic diagram of the invention；
Attached drawing 2 is the sectional view of Fig. 1；
Attached drawing 3 is the guide rod displacement self-test schematic diagram of embodiment one；
Attached drawing 4 is the guide rod displacement self-test schematic diagram of embodiment two；
Attached drawing 5 is the guide rod displacement self-test schematic diagram of embodiment three.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment 1:
As shown in Figure 1 and Figure 2, pilot hole hole wall 2 is provided with guide rod 5.Bracket 6, this reality are installed in pilot hole hole wall 2
It applies example and uses upper layer and lower layer, electromagnet 7 is housed on bracket 6.Electromagnet shown in Fig. 2 is U-shaped.Because the inductance of coil is guide rod
The function of displacement, therefore the voltage at its both ends is also the function of guide rod displacement.
As shown in figure 3, the circuit is by band-pass circuit 1a, level-one amplifying circuit 2a, differential detection circuit 3a, demodulator circuit
4a, low-pass filter circuit 5a composition.In the input terminal of the Linear Power Amplifier of magnet coil, a high-frequency signal is injected as guide rod position
The test signal set, the voltage at both ends is other than acting on ohmically DC component, and there are also the high-frequency signals on inductance
AC compounent.Band-pass circuit 1a is used to extract 0 ingredient of centre frequency ω containing guide rod displacement, filters out DC voltage and 2 ω 0
Above alternating voltage.The consequential signal generally detected is fainter, it usually needs after level-one amplifying circuit 2a amplification, up and down
Two paths of signals subtracts each other to obtain the sinusoidal signal containing centre frequency ω 0 by differential subtraction circuit 3a again, whole by demodulator circuit 4a
The DC voltage of pulsation is converted to after stream, then AC signal is filtered off by low-pass filter circuit 5a, can be obtained inclined with guide rod
The proportional DC voltage of heart amount.Direct current signal containing guide rod displacement, via controller 6a and 8a-1 couples of power amplifier
Guide rod displacement carries out closed-loop control, and the controller of the present embodiment uses PID controller.
In the present embodiment, sensor is not used, using high frequency small-signal as test signal, extracts position from test signal
Information is moved, realizes guide rod self-centering in pilot hole hole wall.
Embodiment 2:
Fig. 4 is guide rod eccentricity self-check system schematic diagram.The circuit is by biasing circuit, detection circuit and control electricity
Road three parts composition.
The signal that pulse-width signal (PWM) generating device 9a is generated is input in biasing circuit 10a, is produced in electromagnet
Raw bias magnetic field.Since electromagnet inductance coefficent is the function of guide rod displacement, the load of PWM is extracted from control electromagnet
It include guide rod displacement information in wave voltage (or electric current) ingredient.Since control electric current removes biasing in control voltage (electric current)
Outside the carrier component for the PWM that coil mutual inductance comes, there are also control electric current control electromagnet coil on generate voltage (including from
Electrification pressure).Therefore, controlling the resonance circuit 11a extraction that the voltage exported on electromagnet coil has to pass through detection system has
The PWM carrier signal of displacement information.By the signal of extraction after full-wave rectifying circuit 12a rectification, by low-pass filter circuit 5a-
2 become the low frequency signal containing guide rod displacement information.Control signal is converted to by controller again, through power amplifier 8a-2
Drive control electromagnet after amplification carries out closed-loop control to guide rod position.The controller 6a-2 of the present embodiment uses PID control
Device.
In the present embodiment, sensor is not used, using pulse-width signal as test signal, is extracted from test signal
Displacement information realizes guide rod self-centering in pilot hole hole wall.
Embodiment 3:
In the present embodiment, sensor is housed, using sensor detection guide rod relative to pilot hole on pilot hole hole wall
Guide rod self-centering in pilot hole hole wall is realized in the displacement of hole wall.
Fig. 5 is guide rod eccentricity self-check system schematic diagram.Electricity routing sensor 14a, controller 6a-3, power are put
Two 8a-4 of big one 8a-3 of device and power amplifier, displacement conversion circuit 13a composition.
When guide rod bias, sensor 14a detects displacement signal after displacement conversion circuit 13a conversion, through controlling
Device 6a-3 and power amplifier 8a-3 is transformed to control electric current, and the electromagnetic force of regulating magnet makes pilot hole hole wall and guide rod
Automatic centering.
If use while using permanent magnet and electromagnet in above-described embodiment, the iron core of electromagnet can use E sections
The heart.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (9)
1. a kind of syringe pump, comprising: pedestal；Motor on the pedestal, syringe tube briquetting, three X are mounted on to parallel
Guide rod；By the motor-driven lead screw；Syringe handle assemble mechanism, there are three pilot holes, a syringe handle limit for tool
Position slot and a drive hole；The lead screw and the drive hole cooperatively form lead screw pair, and the guide rod is matched with the pilot hole
Conjunction forms sliding pair；The center of three pilot holes is located on three vertex of equilateral triangle, the center of the drive hole
Positioned at the center of the equilateral triangle, the symmetry axis of the syringe handle limiting slot and the Z-direction of the equilateral triangle
Middle line is overlapped；
Several magnet are housed on guide rod or pilot hole hole wall；The magnet coil is connected with guide rod bias amount control circuit
It connects；Eccentric amount control circuit contains displacement detecting circuit, and the controller being connected with displacement detecting circuit converts the displacement signal
To control signal, the drive magnet after power amplifier amplifies controls guide rod displacement.
2. syringe pump according to claim 1, it is characterised in that: displacement detecting circuit includes that several are arranged in guide rod
The displacement signal of sensor on upper or pilot hole hole wall, sensor output is input to control after displacement conversion circuit transformation
Device is converted into control signal by controller, and the drive magnet after power amplifier amplifies controls guide rod displacement.
3. syringe pump according to claim 1, it is characterised in that: displacement detecting circuit is using pulse-width signal as survey
Trial signal is tested in signal and is loaded with displacement information, controller is input to after transformed, which is converted to control by controller
Signal processed, the drive magnet after power amplifier amplifies control guide rod displacement.
4. syringe pump according to claim 1, it is characterised in that: displacement detecting circuit amplifies electricity by band-pass circuit, level-one
Road, differential detection circuit, demodulator circuit, low-pass filter circuit successively form, and displacement detecting circuit uses high frequency small-signal conduct
Test signal.
5. syringe pump according to claim 1 or 2 or 3 or 4, it is characterised in that: magnet is in guide rod or pilot hole hole wall
On be arranged symmetrically.
6. syringe pump according to claim 1 or 2 or 3 or 4, it is characterised in that: be equipped with bracket, institute on pilot hole hole wall
It is rack-mount to state magnet.
7. according to syringe pump described in claims 1 or 2 or 3 or 4, it is characterised in that: the magnet is electromagnet, the electromagnet
Dress on the guide bar, is equipped with permanent magnet on pilot hole hole wall on position corresponding with electromagnet.
8. according to syringe pump as claimed in claim 7, it is characterised in that: have axially extending bore, the conducting wire of electromagnet on the guide rod
Pass through from through-hole.
9. according to syringe pump described in claims 1 or 2 or 3 or 4, it is characterised in that: the magnet is electromagnet, the electromagnet
On pilot hole hole wall, permanent magnet is housed on the guide bar on position corresponding with electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029958.1A CN110478566A (en) | 2018-01-01 | 2018-01-01 | A kind of syringe pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029958.1A CN110478566A (en) | 2018-01-01 | 2018-01-01 | A kind of syringe pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110478566A true CN110478566A (en) | 2019-11-22 |
Family
ID=68543569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810029958.1A Pending CN110478566A (en) | 2018-01-01 | 2018-01-01 | A kind of syringe pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110478566A (en) |
-
2018
- 2018-01-01 CN CN201810029958.1A patent/CN110478566A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Sihui Yuancheng Machinery Technology Co. Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| PB01 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Hao Document name: Notice of expiration of the time limit for the trial |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Hao Document name: Deemed as a notice of withdrawal |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191122 |