CN108915971A - Mobile phase ratio control method and device, high pressure constant flow pump and storage medium - Google Patents
Mobile phase ratio control method and device, high pressure constant flow pump and storage medium Download PDFInfo
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- CN108915971A CN108915971A CN201810538291.8A CN201810538291A CN108915971A CN 108915971 A CN108915971 A CN 108915971A CN 201810538291 A CN201810538291 A CN 201810538291A CN 108915971 A CN108915971 A CN 108915971A
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- high pressure
- constant flow
- flow pump
- camshaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
Abstract
The present invention discloses a kind of mobile phase ratio control method and device, high pressure constant flow pump and storage medium.The mobile phase ratio control method includes：Obtain the number and mixed proportion of mobile phase to be mixed；Corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated according to mixed proportion and in advance, obtains one or more handoff angle, and handoff angle is camshaft angle when two mobile phases are executed with handover operation；Current camshaft angle is matched with one or more handoff angle；According to matching result, the absorption object of high pressure constant flow pump is mutually switched into next mobile phase corresponding with the handoff angle of successful match from now thereof.Using the technical solution in the embodiment of the present invention, the liquid mixed-precision of high pressure constant flow pump can be improved.
Description
Technical field
The present invention relates to fluid analysis field more particularly to a kind of mobile phase ratio control method and devices, high voltage and constant current
Pump and storage medium.
Background technique
It in some fluid analysis instruments, needs to mix two-spot and the above liquid of two-spot, to execute to sample
Elution processing, reaches the separation purpose of sample.By taking blood analyser as an example, it can be isolated in blood sample by elution processing
Hemoglobin.
To mix the liquid of two-spot and two-spot or more according to predetermined ratio, needed in the prior art through pre- timing
Between ratio control high pressure constant flow pump proportioning valve, handover operation is executed to two-spot and the above liquid of two-spot, obtains meeting mixing need
The eluent asked.
But the inventors of the present application found that high pressure constant flow pump includes suction and idle running in a stroke cycle, and it is high
Constant flow pump is pressed only just to execute liquid assimilating operation in suction, and the method for predetermined time ratio in the prior art needs together
When be included in calculating to suction time and idle running time, joined redundancy time for the control operation of proportioning valve, cause high pressure permanent
The liquid mixed-precision for flowing pump is lower.
Summary of the invention
The embodiment of the invention provides a kind of mobile phase ratio control method and device, high pressure constant flow pump and storage medium,
It can be improved the liquid mixed-precision of high pressure constant flow pump.
In a first aspect, the embodiment of the present invention provides a kind of mobile phase ratio control method, the mobile phase ratio control method
Including：
Obtain the number and mixed proportion of mobile phase to be mixed；
Corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated according to mixed proportion and in advance, obtains
To one or more handoff angle, handoff angle is camshaft angle when two mobile phases are executed with handover operation；
Current camshaft angle is matched with one or more handoff angle；
According to matching result, the absorption object of high pressure constant flow pump is mutually switched to from now thereof to the switching with successful match
The corresponding next mobile phase of angle.
In a kind of possible embodiment of first aspect, the plunger rod of high pressure constant flow pump does straight line by camshaft drive
It moves back and forth；Corresponding pass between the camshaft angle and liquid absorption amount for the high pressure constant flow pump demarcated according to mixed proportion and in advance
System, before obtaining one or more handoff angle, this method further includes：When plunger rod is in decline lift, with camshaft
The product of angle corresponding plunger rod position slippage and plunger rod area, as liquid absorption amount corresponding with camshaft angle,
Obtain the corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump of pre- calibration.
In a kind of possible embodiment of first aspect, the high pressure constant flow pump demarcated according to mixed proportion and in advance it is convex
Corresponding relationship between wheel shaft angle and liquid absorption amount obtains one or more handoff angle, including：By imbibition in stroke cycle
Camshaft angle section when amount is not 0 is as absorption section；Using mixed proportion to draw section divide, obtain with respectively
Flow corresponding absorption subinterval；By the corresponding camshaft angle of node between adjacent absorption subinterval, as with phase
Neighbour draws the handoff angle of corresponding two mobile phases in subinterval.
In a kind of possible embodiment of first aspect, according to matching result, by the absorption pair of high pressure constant flow pump
After mutually switching to next mobile phase corresponding with the handoff angle of successful match from now thereof, this method further includes：It surveys
Measure the fluid pressure in the suction pipe of high pressure constant flow pump；If fluid pressure is not in preset pressure limit, according to measurement
The revolving speed of obtained liquid pressure value compensation high pressure constant flow pump.
Second aspect, the embodiment of the present invention provide a kind of mobile phase ratio control device, the mobile phase ratio control device
Including：
Module is obtained, for obtaining the number and mixed proportion of mobile phase to be mixed；
First computing module, the camshaft angle and liquid absorption amount of the high pressure constant flow pump for demarcating according to mixed proportion and in advance
Between corresponding relationship, obtain one or more handoff angle, handoff angle is when executing handover operation to two mobile phases
Camshaft angle；
Matching module, for matching current camshaft angle with one or more handoff angle；
Proportioning valve, for according to matching result, the absorption object of high pressure constant flow pump is mutually switched to from now thereof with
With the corresponding next mobile phase of successful handoff angle.
In a kind of possible embodiment of second aspect, the plunger rod of high pressure constant flow pump does straight line by camshaft drive
It moves back and forth；Device further includes the second computing module, corresponding with camshaft angle when for plunger rod to be in decline lift
The product of plunger rod position slippage and plunger rod area obtains pre- calibration as liquid absorption amount corresponding with camshaft angle
High pressure constant flow pump camshaft angle and liquid absorption amount between corresponding relationship.
In a kind of possible embodiment of second aspect, which further includes：Pressure measuring module, for measuring height
Press the fluid pressure in the suction pipe of constant flow pump；Compensating module, if for fluid pressure not in preset pressure limit,
According to the revolving speed for the liquid pressure value compensation high pressure constant flow pump that measurement obtains.
In a kind of possible embodiment of second aspect, which further includes：Angle Measurement Module, it is convex for measuring
Wheel shaft angle.
In a kind of possible embodiment of second aspect, the lowest point of the lifting curve of camshaft is provided with scarce
Mouthful, Angle Measurement Module includes photoelectric sensor and processor；Wherein, photoelectric sensor includes fixing relative to camshaft two sides
The transmitters and receivers of setting, transmitter will be acquired for launching photosignal, receiver for acquiring photosignal
To photosignal be sent to processor；Processor obtains camshaft angle according to collected photosignal.
The third aspect, the embodiment of the present invention provide a kind of high pressure constant flow pump, and high pressure constant flow pump includes flowing as described above
Phase Proportion control device.
Fourth aspect.The embodiment of the present invention provides a kind of computer readable storage medium, is stored thereon with program, program quilt
Processor realizes mobile phase ratio control method as described above when executing.
As described above, when there is flowing to mix demand, the number and mixed proportion of available mobile phase to be mixed, so
Corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated afterwards according to mixed proportion and in advance, obtain one or
The multiple handoff angles of person.Then current camshaft angle and the handoff angle matching for only needing will test, then according to matching
As a result, the absorption object of high pressure constant flow pump is mutually switched to lower one stream corresponding with the handoff angle of successful match from now thereof
Dynamic phase, it will be able to obtain and the consistent mixed liquor of the mixed proportion of demand height.
Due to being to execute handover operation to each mobile phase based on camshaft angle in the embodiment of the present invention, with the prior art
In needs the proportioning valve of high pressure constant flow pump is controlled according to predetermined time ratio, switching behaviour is executed to two-spot and the above liquid of two-spot
It compares, the embodiment of the present invention can exclude the relationship with the time, to improve the liquid mixed-precision of high pressure constant flow pump.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein,
The same or similar appended drawing reference indicates the same or similar feature.
Corresponding relationship shows between expression plunger rod position and the camshaft angle that Fig. 1 provides for first embodiment of the invention
It is intended to；
Fig. 2 is the structural schematic diagram of camshaft corresponding with Fig. 1；
Fig. 3 is the flow diagram for the mobile phase ratio control method that third embodiment of the invention provides；
Fig. 4 is one of the schematic diagram of corresponding relationship between expression camshaft angle corresponding with Fig. 1 and liquid absorption amount；
Fig. 5 is the flow diagram for the mobile phase ratio control method that fifth embodiment of the invention provides；
Fig. 6 is two of the schematic diagram of corresponding relationship between expression camshaft angle corresponding with Fig. 1 and liquid absorption amount；
Fig. 7 is three of the schematic diagram of corresponding relationship between expression camshaft angle corresponding with Fig. 1 and liquid absorption amount；
Fig. 8 is the structural schematic diagram for the camshaft angle measuring device that eighth embodiment of the invention provides；
Fig. 9 is the structural schematic diagram for the mobile phase ratio control device that ninth embodiment of the invention provides.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.
The embodiment of the present invention provides a kind of mobile phase ratio control method and device, high pressure constant flow pump and storage medium, uses
In the high pressure constant flow pump of liquid chromatograph or glycolated hemoglobin analysis.Using the technical side in the embodiment of the present invention
Case can be improved the liquid mixed-precision of high pressure constant flow pump, obtain the eluent for meeting mixing demand.
High pressure constant flow pump is a kind of reciprocating double cam plunger pump by micro computer control, with easy to operate, flow velocity is steady
Fixed, the small feature low with failure rate of pressure fluctuation.The plunger rod of high pressure constant flow pump does straight reciprocating motion by camshaft drive.
Corresponding relationship shows between expression plunger rod position and the camshaft angle that Fig. 1 provides for first embodiment of the invention
It is intended to, illustrates in a swing circle of camshaft, the corresponding relationship between camshaft angle and plunger rod position.
Abscissa shown in Fig. 1 is camshaft angle, and ordinate is plunger rod position.
As shown in Figure 1, in a swing circle of camshaft, plunger rod first rises, rear to decline.Plunger rod uphill process
In, high pressure constant flow pump executes liquid push operation；During plunger rod decline, high pressure constant flow pump executes liquid assimilating operation.
In Fig. 1, the lift minimum point of 0 ° of expression plunger rod, P1 indicates the lift highest point of plunger rod, in an example
In, P1 can be 96 °.
Fig. 2 is the structural schematic diagram of camshaft corresponding with Fig. 1.As shown in Fig. 2, camshaft is rotated in a clockwise direction,
When camshaft is rotated to 0 °, plunger rod is exactly in lift minimum point, and when camshaft is rotated to the position P1, plunger rod is just
In lift highest point.
In one example, camshaft angle is the bent wheel shaft at 0 ° of position with a thickness of 10mm, camshaft angle P1
The thickness of wheel shaft at position can be 12mm.
Fig. 3 is the flow diagram for the mobile phase ratio control method that third embodiment of the invention provides.As shown in figure 3,
The mobile phase ratio control method includes step 301 to step 304.
In step 301, the number and mixed proportion of mobile phase to be mixed are obtained.
In step 302, between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated according to mixed proportion and in advance
Corresponding relationship, obtain one or more handoff angle, handoff angle is convex when two mobile phases are executed with handover operation
Wheel shaft angle.
Illustratively, if the number of mobile phase to be mixed is 2, an available handoff angle.If flowing to be mixed
The number of phase is 4, then available three handoff angles.
In step 303, current camshaft angle is matched with one or more handoff angle.
In step 304, according to matching result, the absorption object of high pressure constant flow pump is mutually switched to from now thereof with
With the corresponding next mobile phase of successful handoff angle.
As described above, when there is flowing to mix demand, the number and mixed proportion of available mobile phase to be mixed, so
Corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated afterwards according to mixed proportion and in advance, obtain one or
The multiple handoff angles of person.Then current camshaft angle and the handoff angle matching for only needing will test, then according to matching
As a result, the absorption object of high pressure constant flow pump is mutually switched to lower one stream corresponding with the handoff angle of successful match from now thereof
Dynamic phase, it will be able to obtain and the consistent mixed liquor of the mixed proportion of demand height.
Due to being to execute handover operation to each mobile phase based on camshaft angle in the embodiment of the present invention, with the prior art
In needs the proportioning valve of high pressure constant flow pump is controlled according to predetermined time ratio, switching behaviour is executed to two-spot and the above liquid of two-spot
It compares, the embodiment of the present invention can exclude the relationship with the time, to improve the liquid mixed-precision of high pressure constant flow pump.
In one alternate embodiment, when plunger rod can be in decline lift, plunger corresponding with camshaft angle
The product of bar position slippage and plunger rod area, as liquid absorption amount corresponding with camshaft angle, to obtain pre- calibration
High pressure constant flow pump camshaft angle and liquid absorption amount between corresponding relationship.
In conjunction with Fig. 1, when plunger rod is in decline lift, corresponding camshaft angle is in [P1,360 °] range.Specifically
Can by the product of camshaft angle each in the section [P1,360 °] corresponding plunger rod slippage and plunger rod area, as
Liquid absorption amount corresponding with plunger rod position obtains corresponding between the camshaft angle of the high pressure constant flow pump of pre- calibration and liquid absorption amount
Relationship.
Fig. 4 is the schematic diagram of corresponding relationship between expression camshaft angle corresponding with Fig. 1 and liquid absorption amount.It is shown in Fig. 4
Abscissa be camshaft angle, ordinate is liquid absorption amount.
As shown in figure 4, high pressure constant flow pump starts suction operation when camshaft angle is P1, liquid absorption amount is 0 at this time, when convex
High pressure constant flow pump terminates suction operation when wheel shaft angle is 360, and liquid absorption amount is 100% at this time.
Fig. 5 is the flow diagram for the mobile phase ratio control method that fifth embodiment of the invention provides.Fig. 5's and Fig. 3
The difference is that the step in Fig. 3 can be refined as the step 3021 in Fig. 5 to step 3023.
In step 3021, camshaft angle section when using liquid absorption amount in stroke cycle not being 0 is as drawing section.
In conjunction with Fig. 1 and Fig. 4, when plunger rod can be in decline lift, camshaft angle is the angular area of [P1,360 °]
Between as draw section.
In step 3022, is divided using mixed proportion to section is drawn, obtain absorption corresponding with each flowing
Subinterval.
In step 3023, by the corresponding camshaft angle of node between adjacent absorption subinterval, as with it is adjacent
Draw the handoff angle of corresponding two mobile phases in subinterval.
In one example, as shown in fig. 6, if mobile phase to be mixed includes A phase and B phase, wherein A phase accounts for 60%, B
Mutually account for 40%, then available two absorption subintervals [P1, P2] and (P2,360 °], be respectively used to draw A phase and B phase.This two
The width ratio in a subinterval is that 3/2, P2 is handoff angle corresponding with A phase and B.
Mobile phase ratio control method based on Fig. 6 can be described as：
Start high voltage and constant current pump motor, in each stroke cycle of high pressure constant flow pump, obtain camshaft angle Pt in real time,
When Pt is equal to P1, high pressure constant flow pump executes suction operation to A phase, and when pt is equal to P2, high pressure constant flow pump will draw object from A
Mutually switch to B phase.When Pt is equal to P1, the period is controlled into next ratio.
In another example, as shown in fig. 7, A phase accounts for if mobile phase to be mixed includes A phase, B phase, C phase and D phase
50%, B phase, which account for 30%, C phase and accounts for 15%, D phase, accounts for 5%, then available four absorption subintervals [P1, P3], (P3, P4],
(P4, P5] and (P5,360 °], it is respectively used to draw A phase, B phase, C phase and D phase, the width ratio in this four subintervals is 10/6/3/
1, P3 is handoff angle corresponding with A phase and B, and P4 is handoff angle corresponding with B phase and C, and P5 is opposite with C phase and D
The handoff angle answered.
Mobile phase ratio control method based on Fig. 7 can be described as：Start high voltage and constant current pump motor, in high pressure constant flow pump
Each stroke cycle in, in real time obtain camshaft angle Pt, when Pt be equal to P1 when, high pressure constant flow pump to A phase execute absorption behaviour
Make, when pt is equal to P3, high pressure constant flow pump will draw object and switch to B phase from A phase, and when pt is equal to P4, high pressure constant flow pump will
It draws object and switches to C phase from B phase, when pt is equal to P5, high pressure constant flow pump will draw object and switch to D phase from C phase.As Pt etc.
When P1, the period is controlled into next ratio.
In embodiments of the present invention, the angle measurement unit for measuring camshaft angle includes encoder, photoelectric sensing
Device and position sensor etc..
Fig. 8 is the structural schematic diagram for the camshaft angle measuring device that eighth embodiment of the invention provides, for specifically opening up
Show the set-up mode of the angle measurement unit based on photoelectric sensor.
As shown in figure 8, a notch 801 can be arranged on camshaft, photoelectric sensor 802 includes relative to camshaft
The transmitters and receivers of two sides fixed setting, transmitter is for launching photosignal, and receiver is for acquiring photosignal.
After the electric motor starting of high pressure constant flow pump, camshaft angle can be obtained by the collected optical signal of receiver.
In one alternate embodiment, notch 801 can be set in the corresponding position of minimum point of the lifting curve of camshaft
Set place (such as at position P1 in Fig. 2).
In one alternate embodiment, the absorption object of high pressure constant flow pump is mutually being switched to and is being matched into from now thereof
After the corresponding next mobile phase of the handoff angle of function, which can also include：Measure high voltage and constant current
Fluid pressure in the suction pipe of pump, if the liquid that fluid pressure not in preset pressure limit, is obtained according to measurement
Pressure value compensates the revolving speed of high pressure constant flow pump, flow-compensated to carry out to high pressure constant flow pump, further increases high pressure constant flow pump
Liquid mixed-precision.
As noted previously, as control signal is the curve acquisition according to high-pressure pump camshaft angle with plunger rod position, and
It converted into nondimensional liquid absorption amount percentage and positional relationship curve, therefore, only need to find switching proportion under corresponding ratio
The camshaft angle of valve, then respective angles switching proportion valve, can be obtained accurate liquid fraction.That is, the present invention is real
Applying example is the condition using current motor corner (camshaft angle) as switching solenoid valve, can exclude the relationship with the time, from
And it can be avoided non-influence of the at the uniform velocity operating to liquid absorption amount nonlinear change of motor.Therefore, the embodiment of the present invention being capable of high-precision
Ground controls the liquid fraction of each mobile phase, and can be suitably used for different high-pressure pump curve movements.
In addition, the present invention can guarantee the switching of proportioning valve in imbibition effective travel, pump is transported in any rate curve
Control ratio will not be had an impact in dynamic, precise proportions can not be obtained by the axis switching control ration of division of the time by solving
Problem.
In addition, the embodiment of the present invention is not only restricted to fixed flowing phase amount, and various ratios are not only restricted to (for example, 1%
With 99% extreme ratio), and high-pressure pump motor speed profile can be detached from, there is good scalability.
Fig. 9 is the structural schematic diagram for the mobile phase ratio control device that ninth embodiment of the invention provides, as shown in figure 9,
The mobile phase ratio control device includes：Obtain module 901, the first computing module 902, matching module 903 and proportioning valve 904.
Wherein,
Obtain number and mixed proportion that module 901 is used to obtain mobile phase to be mixed.
The camshaft angle for the high pressure constant flow pump that first computing module 902 is used to demarcate according to mixed proportion and in advance and imbibition
Corresponding relationship between amount, obtains one or more handoff angle, and handoff angle is to execute handover operation to two mobile phases
When camshaft angle.
Matching module 903 is for matching current camshaft angle with one or more handoff angle.
Proportioning valve 904 is used for according to matching result, the absorption object of high pressure constant flow pump is mutually switched to from now thereof with
The corresponding next mobile phase of the handoff angle of successful match.
Wherein, proportioning valve 904 can use single channel, can also use multichannel.Those skilled in the art can search
Related data understands the specific structure of proportioning valve, herein without limiting.
In one alternate embodiment, which can also be including the second computing module (in figure not
Show), when for plunger rod to be in decline lift, plunger rod corresponding with camshaft angle position slippage and plunger rod are cut
The product of area, as liquid absorption amount corresponding with camshaft angle, obtain the camshaft angle of the high pressure constant flow pump of pre- calibration with
Corresponding relationship between liquid absorption amount.
In one alternate embodiment, which can also include pressure measuring module and compensation mould
Block (not shown).Wherein, pressure measuring module is used to measure the fluid pressure in the suction pipe of high pressure constant flow pump；Compensation
If module not in preset pressure limit, compensates high voltage and constant current according to the liquid pressure value that measurement obtains for fluid pressure
The revolving speed of pump.
In one alternate embodiment, which can also include Angle Measurement Module, for surveying
Measure camshaft angle.
In one alternate embodiment, in conjunction with Fig. 8, jagged, angle is arranged in the lowest point of the lifting curve of camshaft
Spending measurement module includes photoelectric sensor and processor (not shown).
Photoelectric sensor includes the transmitters and receivers relative to the fixed setting of camshaft two sides, and transmitter is for emitting
Collected photosignal is sent to processor for acquiring photosignal by photosignal out, receiver；Processor according to
Collected photosignal is handled, camshaft angle is obtained.
The embodiment of the present invention also provides a kind of high pressure constant flow pump, and high pressure constant flow pump includes mobile phase ratio control as described above
Device processed.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored thereon with program, is executed by processor
Shi Shixian mobile phase ratio control method as described above.
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.For device embodiment, related place may refer to the declaratives of embodiment of the method.Not office of the embodiment of the present invention
It is limited to particular step and structure described above and shown in figure.Those skilled in the art can understand the present invention in fact
It after the spirit for applying example, is variously modified, modification and addition, or the sequence between changing the step.Also, it is risen in order to concise
See, omits the detailed description to known method technology here.
However, it is desirable to clear, the embodiment of the present invention is not limited to specific configuration described above and shown in figure
And processing.Also, the detailed description to known method technology for brevity, is omitted here.In the above-described embodiments, it describes
With show several specific steps as example.But the method process of the embodiment of the present invention is not limited to described and shows
Specific steps out, those skilled in the art can be variously modified, repair after understanding the spirit of the embodiment of the present invention
Change and add, or the sequence between changing the step.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, the element of the embodiment of the present invention is used to execute the program of required task
Or code segment.Perhaps code segment can store in machine readable media program or the data by carrying in carrier wave are believed
It number is sent in transmission medium or communication links." machine readable media " may include be capable of storage or transmission information any
Medium.The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM
(EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can via such as because
The computer network of special net, Intranet etc. is downloaded.
The embodiment of the present invention can be realized in other specific forms, without departing from its spirit and essential characteristics.For example, special
Determining algorithm described in embodiment can be modified, and system architecture is without departing from the substantially smart of the embodiment of the present invention
Mind.Therefore, current embodiment is all counted as being exemplary rather than limited, the model of the embodiment of the present invention in all respects
It encloses by appended claims rather than foregoing description defines, also, falls into the meaning of claim and complete in the range of equivalent
Portion changes all to be included among the range of the embodiment of the present invention.
Claims (11)
1. a kind of mobile phase ratio control method, which is characterized in that including：
Obtain the number and mixed proportion of mobile phase to be mixed；
Corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump demarcated according to the mixed proportion and in advance, obtains
To one or more handoff angle, the handoff angle is camshaft angle when two mobile phases are executed with handover operation；
Current camshaft angle is matched with one or more of handoff angles；
According to matching result, the absorption object of the high pressure constant flow pump is mutually switched to from now thereof to the switching with successful match
The corresponding next mobile phase of angle.
2. the method according to claim 1, wherein the plunger rod of the high pressure constant flow pump is done by camshaft drive
Straight reciprocating motion；The high pressure constant flow pump demarcated according to the mixed proportion and in advance camshaft angle and liquid absorption amount it
Between corresponding relationship, before obtaining one or more handoff angle, the method also includes：
When the plunger rod is in decline lift, plunger rod corresponding with camshaft angle position slippage and plunger rod
The product of sectional area obtains the convex of the high pressure constant flow pump of the pre- calibration as liquid absorption amount corresponding with the camshaft angle
Corresponding relationship between wheel shaft angle and liquid absorption amount.
3. the method according to claim 1, wherein the high pressure demarcated according to the mixed proportion and in advance is permanent
The corresponding relationship between the camshaft angle and liquid absorption amount of pump is flowed, one or more handoff angle is obtained, including：
Camshaft angle section when using liquid absorption amount in the stroke cycle not being 0 is as drawing section；
The absorption section is divided using the mixed proportion, obtains absorption subinterval corresponding with each flowing；
By camshaft angle corresponding the adjacent node drawn between subinterval, as corresponding with the adjacent absorption subinterval
Two mobile phases handoff angle.
4. the method according to claim 1, wherein described according to matching result, by the high pressure constant flow pump
Absorption object mutually switched to from now thereof after next mobile phase corresponding with the handoff angle of successful match, the method
Further include：
Measure the fluid pressure in the suction pipe of the high pressure constant flow pump；
If the fluid pressure compensates the high pressure not in preset pressure limit, according to the liquid pressure value that measurement obtains
The revolving speed of constant flow pump.
5. a kind of mobile phase ratio control device, which is characterized in that including：
Module is obtained, for obtaining the number and mixed proportion of mobile phase to be mixed；
First computing module, the camshaft angle and liquid absorption amount of the high pressure constant flow pump for demarcating according to the mixed proportion and in advance
Between corresponding relationship, obtain one or more handoff angle, the handoff angle is that two mobile phases are executed with switching behaviour
Camshaft angle when making；
Matching module, for matching current camshaft angle with one or more of handoff angles；
Proportioning valve, for according to matching result, the absorption object of the high pressure constant flow pump is mutually switched to from now thereof with
With the corresponding next mobile phase of successful handoff angle.
6. device according to claim 5, which is characterized in that the plunger rod of the high pressure constant flow pump is done by camshaft drive
Straight reciprocating motion；Described device further includes the second computing module, and described when for the plunger rod to be in decline lift
The product of camshaft angle corresponding plunger rod position slippage and plunger rod area, as corresponding with the camshaft angle
Liquid absorption amount, obtain the corresponding relationship between the camshaft angle and liquid absorption amount of the high pressure constant flow pump of the pre- calibration.
7. device according to claim 5, which is characterized in that described device further includes：
Pressure measuring module, the fluid pressure in suction pipe for measuring the high pressure constant flow pump；
Compensating module, if being used for the fluid pressure not in preset pressure limit, the fluid pressure obtained according to measurement
Value complement repays the revolving speed of the high pressure constant flow pump.
8. device according to claim 5, which is characterized in that described device further includes：Angle Measurement Module, for measuring
The camshaft angle.
9. device according to claim 8, which is characterized in that the lowest point of the lifting curve of the camshaft is arranged
Jagged, the Angle Measurement Module includes photoelectric sensor and processor；Wherein,
The photoelectric sensor includes the transmitters and receivers relative to camshaft two sides fixed setting, the transmitter
For launching photosignal, collected photosignal is sent to by the receiver for acquiring the photosignal
The processor；
The processor obtains camshaft angle according to collected photosignal.
10. a kind of high pressure constant flow pump, which is characterized in that including the mobile phase ratio control as described in claim 5-9 any one
Device processed.
11. a kind of computer readable storage medium, is stored thereon with program, which is characterized in that described program is executed by processor
Mobile phase ratio control method of the Shi Shixian as described in claim 1-5 any one.
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| CN201810538291.8A CN108915971B (en) | 2018-05-30 | 2018-05-30 | Mobile phase ratio control method and device, high pressure constant flow pump and storage medium |
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| CN108915971B (en) | 2019-07-19 |
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