CN100338441C - High-precision automatic testing method and device for volume metering tube - Google Patents
High-precision automatic testing method and device for volume metering tube Download PDFInfo
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- CN100338441C CN100338441C CNB2004100524658A CN200410052465A CN100338441C CN 100338441 C CN100338441 C CN 100338441C CN B2004100524658 A CNB2004100524658 A CN B2004100524658A CN 200410052465 A CN200410052465 A CN 200410052465A CN 100338441 C CN100338441 C CN 100338441C
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Abstract
The present invention relates to a high-precision automatic testing method and a device thereof for the capacity of a volume metering tube. The method comprises the steps: arranging a liquid initial position detector, and a liquid final position detector; arranging a liquid capacity reference source, making the capacity of the liquid capacity reference source larger than the capacity of a measured volume metering tube, and making the liquid capacity reference source controlled to change; arranging a liquid storing container and a liquid collecting container which are used for testing; arranging a control module used for changing the liquid capacity of the liquid capacity reference source; arranging a liquid flowing pipeline; operating the control module, conveying the liquid used for testing to the reference source by the storing container, and conveying the liquid used for testing to the measured volume metering tube by the reference source; firstly operating the final position detector; continuously conveying the liquid used for testing in the redundant quantity to the measured volume metering tube; conveying the liquid used for testing to the reference source by the measured volume metering tube; starting to measure when the liquid final position detector is operated again; stopping measuring when the operation of the liquid initial position detector is stopped. The method and the device provide possibility for realizing the capacity measurement of the volume metering tube with high precision and high efficiency.
Description
Technical field
The present invention relates to be used for the method for testing and the equipment of the marked capacity of fluid, particularly relate to the method for testing and the device of volumescope buret volume, relate in particular to the method and the device that carry out the volumetric measurement of volumescope buret by accurate measuring room.
Background technology
The volumescope buret is mainly used in the metering to liquid capacity, is a kind of metrology devices.The measuring accuracy of volumescope buret itself, the direct product of use volumescope buret in the influence productions/application process is such as the overall performance of medicinal blood cytoanalyze etc.The measuring accuracy of volumescope buret itself is an important index, if volumescope buret self volume is uncertain, all can cause harmful effect to the performance of entire product.
To the test of volumescope buret, mostly be direct internal diameter in the past, calculated the volume of determining in the length then with vernier caliper test volume gauge line.Because the volumescope buret is generally glassware, its manufacture craft has determined the unevenness of its tube wall and endurance not, measures internal diameters so need choose a plurality of positions of volumescope buret, averages as end product again.Adopt the method for the direct testing length of vernier caliper, three shortcomings are arranged: at first, the tube wall of volumescope buret is inhomogeneous, and the internal diameter of test only may be a mean value, the size of reaction volume gauge line itself exactly; Secondly, the volume of volumescope buret is a micro updating, only several millimeters of internal diameters, and, increased the difficulty of vernier caliper test operation because tube wall is a curved surface, reduced the precision of test result; At last, be manual operation owing to adopt vernier caliper, different testers tests same volumescope buret can produce different results, the confidence level of data is reduced, but also have the possibility of damaging glassware.
On the other hand, the technology of carrying out the volumetric measurement of container by accurate measuring room has varied, as: the method and apparatus of the disclosed a kind of measuring vessel of Chinese patent ZL92105771, Chinese patent ZL 93112882 disclosed a kind of volume quantitative methods and realize the volume quantitative device of this method, Chinese patent ZL 01208367 disclosed a kind of hydraulic control piston type small flowmeter.
As seen,, substitute the manual metering process of existing volumescope buret volume, to improve measuring accuracy and efficiency of measurement, the solution that does not obtain all the time how in conjunction with existing technology of carrying out the volumetric measurement of container by accurate measuring room.
Summary of the invention
The technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part, and proposes a kind of by accurate measuring room high precision, high efficiency method and the device that carries out the volumetric measurement of volumescope buret.
The technical scheme that the present invention solves the problems of the technologies described above employing is, proposes a kind of high-precision automatic method of testing of volumescope buret volume, comprises step:
1., the one liquid start bit detecting device and a liquid stop bit detecting device of tested volume gauge line are set;
2., a liquid capacity reference source is set, the volume of this reference source is greater than the volume of tested volume gauge line, but and controlled change;
3., a test liquid reservoir vessel is set;
4., a test liquid collection container is set;
5., the control module that a liquid capacity reference source liquid capacity changes is set;
6., be provided with and connect test with liquid reservoir vessel and liquid capacity reference source, liquid capacity reference source and the pipeline of test with liquid collection container and liquid capacity reference source and tested volume gauge line, contain in this pipeline and accept control module and instruct the parts that carry out the pipeline switching;
7., described control module action, test is transported to reference source with liquid by reservoir vessel, be transported to tested volume gauge line by reference source again, after when liquid stop bit detecting device moves first, continuation is transported to tested volume gauge line with the test of an amount of redundancy with liquid, test is transported to reference source with liquid by tested volume gauge line then, when moving once more, liquid stop bit detecting device begins metering, move to liquid start bit detecting device, tenth skill, metering finishes, and this metering result is a measured value of the volume of tested volume gauge line, can be as the test result of the volume of tested volume gauge line.
Need to prove: after liquid arrives the stop bit detecting device in fact for the first time, for improving reliability, the liquid level shake of avoiding occurring causes the detector false action, reference source also will continue to carry the test liquid of an amount of redundancy, begin drawing liquid then, just when liquid causes that for the second time the stop bit detector state changes, just begin metering.The occurrence of described amount of redundancy depends on the needs of the inventive method practical application, and be set in the reasonable range by the those skilled in the art of the industry, and actual tested volume gauge line, there is rational distance between its metering scale and the mouth of pipe, the upper limit reference when this distance is just considered amount of redundancy.
8., 7. described step carry out repeatedly, correspondingly obtains repeatedly measured value; After test finished, test was transported to collection container with liquid.
For improving accuracy of detection, discardable primary measured value is got other mean value that remains time measured value as test result;
9., be the reliability of control detection, can also calculate CV (coefficient of variation) value of other residue time measured value, if this value confirm that described test result is effective, otherwise described test result is invalid in the scope of setting.
Described step is accepted the control module instruction in 6. and is carried out the parts that pipeline switches and refer to solenoid valve.
Described liquid capacity reference source is a syringe.
Described control module comprises a stepper motor, driving circuit, control circuit and motor transmission mechanism, and described gear train is converted into moving of syringe behaviour piston to the action of motor;
Described control circuit comprises a microprocessor;
Described step metering process 7. comprises the action by microprocessor control step motor, and stepper motor is added up at the action frequency that begins to be metered between the metering end, and microprocessor is calculated the metering result according to this accumulative total again.Because the high precision of syringe self-capacity, the distance that each action pushing syringe operation one of stepper motor is determined, thereby the corresponding high-precision volumetric metering of each action, be multiplied by from beginning to be metered into the stepper motor action accumulative total the metering terminal procedure, be high-precision metering result.
Described liquid start bit detecting device and liquid stop bit detecting device all adopt optocoupler to detect liquid level.
The technical scheme that the present invention solves the problems of the technologies described above employing also comprises, manufactures and designs a kind of device of high-precision automatic method of testing of volumescope buret volume, comprising:
Be arranged on tested volume gauge line other a liquid start bit detecting device and a liquid stop bit detecting device;
One liquid capacity reference source, the volume of this reference source is greater than the volume of tested volume gauge line, but and controlled change;
One test liquid reservoir vessel;
One test liquid collection container;
One control module;
Connect test and use liquid reservoir vessel and liquid capacity reference source, liquid capacity reference source and test, contain in this pipeline and accept the parts that the pipeline switching is carried out in the control module instruction with the pipeline of liquid collection container and liquid capacity reference source and tested volume gauge line; Described liquid start bit detecting device links to each other with control module with liquid stop bit detecting device, and, described control module is transported to reference source to test with liquid by reservoir vessel, be transported to tested volume gauge line by reference source again, after moving first to liquid stop bit detecting device, continuation is transported to tested volume gauge line with the test of an amount of redundancy with liquid, then test is transported to reference source with liquid by tested volume gauge line, when moving once more, liquid stop bit detecting device begins metering, move to liquid start bit detecting device, finish metering, this metering result is a measured value of the volume of tested volume gauge line.
Compare with prior art, the high-precision automatic method of testing and the device of volumescope buret volume of the present invention, for realize high precision, carrying out that the volumetric measurement of volumescope buret provides expeditiously may.
Description of drawings
Fig. 1 is the high-precision automatic proving installation synoptic diagram of volumescope buret volume of the present invention.
Fig. 2 is a control module electricity theory diagram of the present invention.
Fig. 3 A to 3C is the process flow diagram of microprocessor internal software in the control module of the present invention.
Fig. 4 is a control circuit principle schematic in the control module of the present invention.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
The high-precision automatic method of testing of volumescope buret volume of the present invention is by the step motor drive leading screw, and liquid is drawn or released to leading screw pushing syringe piston.Because half step of the every motion of stepper motor, the stroke of leading screw all is a fixed value, and syringe is the right cylinder of a standard, sectional area is fixed, so the liquid that makes syringe draw or release by the stepper motor motion is the standard value that can calculate, precision reaches 0.001 μ L.The liquid that allows syringe release charges into tested volume gauge line, can be by calculating the volume that the volume of releasing liquid obtains determining length inner volume gauge line, and the test value precision can reach 0.01 μ L.The 2.5mL syringe piston diameter that adopts is 7.5mm at present.In half step of stepper motor feeding, its leading screw moves 0.0255mm.Because motor leading screw and syringe piston are fastenedly connected, so syringe is with moved further 0.0255mm.Can calculate half step of motorized feed thus, the volume that syringe is released is 1.1265 μ L.The precision of these data has arrived 0.0001 μ L, so last precision can reach 0.001 μ L at least.Because syringe is the right cylinder of a standard, what each half step all can be thought propelling is a steady state value, though motor is lost the step and the screw mandrel error also can produce test error, but it is all very little, in the scope of one and half steps propelling, i.e. 1.1265 μ L, and test value is 500 μ L, so all can ignore.
The present invention adopts microprocessor to realize all control automatically.Stepper motor is carried out half step drive controlling, allow syringe release or imbitition.Volumescope buret measured length is really demarcated with two optocouplers, and when liquid process optocoupler position, the output signal of optocoupler can change, and single-chip microcomputer can be judged the position of liquid in the volumescope buret by detecting the optocoupler variation of output signals in real time.Being full of two liquid volumes between optocoupler, promptly is the result who needs test.Single-chip microcomputer can obtain this and be worth half step number that corresponding stepper motor advances.Multiply by the volume of the per half step release of syringe again with half step number, just obtained the volume of definite length inner volume gauge line.
The liquid that the present invention adopts the bigger liquid of surface tension to draw or release as syringe is stronger than water because of the surface tension of the bigger liquid of surface tension, when the bigger liquid of surface tension moves in the volumescope buret, maintenance liquid level that can be very fast, and closely contact with tube wall, can not produce and hang the liquid phenomenon, strengthen the reliability of test at tube wall.
The high-precision automatic proving installation of volumescope buret volume of the present invention, its basic structure as shown in Figure 1, the lower left is a stepper motor, is controlled by driving circuit by microprocessor, sees shown in Figure 4.Stepper motor allows syringe suck or discharged liquid with the piston motion of the mode pushing syringe of half step driving.Be an initial bit optocoupler directly over the stepper motor, after each test was finished, stepper motor all can continue motion, and the catch on syringe blocks the initial bit optocoupler, and this moment, the output signal of optocoupler can change, and stepper motor no longer moves.The effect of this initial bit optocoupler is the motion of restriction stepper motor.The top of initial bit optocoupler is exactly a syringe.The delivery outlet of syringe is connecting solenoid valve 2 and 1, two of solenoid valve all is a T-valve, and the liquid road connects shown in Figure 1.When solenoid valve 1 and solenoid valve 2 all were in normally open, microprocessor control syringe moved downward, and can draw the bigger liquid of surface tension in the reagent bucket.When solenoid valve 2 was in normal off status, microprocessor control syringe moved upward, and can enter collection container to the bigger liquid of surface tension.When solenoid valve 1 is in normal pass, when solenoid valve 2 was in normally open, microprocessor control syringe moved upward, and can push the bigger liquid of surface tension and charge into the bigger liquid of surface tension in volumescope buret or the sucking-off volumescope buret.Tested volumescope buret is installed in two level detection optocouplers: between optocoupler 1 and the optocoupler 2.When the bigger liquid of surface tension enters the volumescope buret, when passing level detection optocoupler 1 or optocoupler 2, the output signal of level detection optocoupler 1 or optocoupler 2 can change, and microprocessor detects the output signal situation of change of these two level detection optocouplers 1 or optocoupler 2 in real time.
Circuits System in the high-precision automatic proving installation of volumescope buret volume of the present invention, as shown in Figure 2, comprise the microprocessor that plays the role of a nucleus, the button 1 and 2 that is connected with this microprocessor, solenoid valve 1 and 2 control circuit, optocoupler 1 and 2, the digital display tube of LED, RS232 interface circuit and stepping motor control circuit, Fig. 4 show the circuit of microprocessor control step motor.The entire circuit system is divided into three circuit boards, one is master control borad, execution control and data processing section for native system, the folding of control electromagnetic valve, half step of control motor drives, and receives and handle the output signal of level detection optocoupler, receives and handle the button request, calculate test result, this master control borad is installed in the inside of device; One is to show and keypad, have two buttons and 5 digital display tubes of eight sections LED, be installed on the front panel of whole device, system is operated and shows current test result, the effect of a button is to start test, be called the startup feeler switch, the effect of another button is to show the volumescope buret number of having tested after this start, is called and surveys the number key; One is the level detection plate, and two level detection optocouplers are installed on this plate, and the output signal of optocoupler is passed to master control borad after by the shaping of this plate.This plate also is installed on the front panel of device, and tested volumescope buret is installed between two level detection optocouplers of this plate.
Before the test beginning, connect the liquid road, comprise correctly connecting reagent bucket and collection container, and the volumescope buret is fixed between two level detection optocouplers 1 or the optocoupler 2 by assigned address by structure shown in Figure 1.Confirm errorless after, energized is pressed the startup feeler switch, the microprocessor internal program begins to carry out, and promptly begins once to test.Microprocessor internal is carried out the flow process of test function, is illustrated by Fig. 3 A to 3C.
At first, as shown in Figure 3A, microprocessor controls solenoid valves 1 and solenoid valve 2 are normally open, drive stepping motor then, and syringe begins to move downward from the initial bit optocoupler, and syringe is drawn the bigger liquid of surface tension about 1ml from the reagent bucket.Then, forward solenoid valve 1 to normal off status, the step motor drive syringe moves upward.The liquid that surface tension is bigger will enter the volumescope buret so.When level detection optocoupler 1 or optocoupler 2 were not blocked by the bigger liquid of the surface tension in the volumescope buret, output signal was a high level, in case the bigger liquid of surface tension has blocked optocoupler 1 or optocoupler 2, output signal will become low level.After beginning to push away liquid and entering the volumescope buret, microprocessor is the output signal of monitoring level detection optocoupler 1 in real time just.After the output signal of finding level detection optocoupler 1 becomes low level, the liquid level that shows the liquid that surface tension is bigger has arrived the top of determining length, for guaranteeing reliability, motor upwards moves 80 half steps again, as seen the about 14ms of time-delay then, termination liquid level position at this moment will exceed the detection position of level detection optocoupler 1.
Then, shown in Fig. 3 B, stepper motor moves downward, and begins to suck back the bigger liquid of surface tension.When the output signal of level detection optocoupler 1 becomes high level once more, show that the bigger liquid of surface tension has moved to the position of level detection optocoupler 1 once more, begin half step number of drive stepping motor is counted this moment.Stepper motor continues to draw the bigger liquid of surface tension, and this moment, single-chip microcomputer began to monitor in real time the position of level detection optocoupler 2.In case the output signal of level detection optocoupler 2 becomes high level by low level, the liquid side that presentation surface tension force is bigger has arrived the position of level detection optocoupler 2, at this moment stop the counting of double step number, the volume of Ci Shi half step number correspondence is exactly the volume from level detection optocoupler 1 position to level detection optocoupler 2 positions so, and just we need test the volume of the volumescope buret in the measured length really.
Then, shown in Fig. 3 C, half step number be multiply by per corresponding dimension criteria value of half step, promptly obtained the volume of volumescope buret.After the bigger liquid of surface tension arrived level detection optocoupler 2 correspondence positions, stepper motor was drawn the volumes in 300 half steps again, guaranteed that the bigger liquid of all surface tension force all discharged tested volume gauge line.Solenoid valve 2 forwards normally open to then, and stepper motor moves upward and arrives the initial bit optocoupler up to syringe, and then the bigger liquid of surface tension in the syringe has been discharged into collection container, and once test is finished.
For guaranteeing the reliability of test, the volumescope buret that every velamen is surveyed all carries out 4 tests, each test interval is about 8ms, the 1st time test result not very, the arithmetic mean of getting back 3 test results is as net result, by showing and keypad output, the register that volumescope buret number surveyed in the interior record of while microprocessor adds 1.The test of a volumescope buret is finished in expression like this, only needs 1 minute time.And, the output quantity of each discovery level detection optocoupler is changed, about 10ms that all delay time, guarantee that liquid level is steady state (SS) after, detect output signal again one time, the reliability that assurance changes.Because this test is adopted is timing Design in proper order, so the size of delaying time is not had accurate requirement, is simplified design, can adopt the implementation method of software delay, so all delay times are general data, does not need degree of accuracy very high.Simultaneously, on the level detection plate, increased LED light, respectively corresponding two level detection optocoupler output signals, the state of LED light changes with level detection optocoupler variation of output signals, the corresponding level detection optocoupler of the bright expression of LED light is blocked by liquid, and LED light is gone out and represented that corresponding level detection optocoupler is not blocked by liquid.The state of operating personnel's Direct observation LED light can be judged liquid level position.
Display circuit adopts the digital display tube of 5 eight sections LED to carry out the dynamic scan demonstration.Display result is 3 integers, 2 decimals, and the acquiescence unit is a microlitre.Single-chip microcomputer not only calculates the arithmetic mean of 3 measurement results, and calculates the CV value, if scope in ± 6%, then shows " PASS " (qualified), otherwise shows " Error " (makeing mistakes).After finishing the test of a volume dose pipe, judged result and test result show that in turn each result shows about 5 seconds of time.By before starting feeler switch, this result shows in turn with continual once more.If press and survey the number key, the volumescope buret number of having tested behind this switch power supply will be shown.After operating personnel finish record, by starting feeler switch, can begin the test of next root measured tube once more.
The present invention has also increased serial ports on master control borad, realized function by serial ports and computing machine communication, can directly operate as host computer with computing machine, need not button, all test results, comprise and survey volume and surveyed number that all can be stored in automatically in the computing machine, automaticity is higher.
In a specific embodiment of the present invention, the model of part critical component is: stepper motor: Haydon company, 46342-05, level detection optocoupler: OPTEK company, OP818, initial bit optocoupler: HONEYWELL company, HOA1877, syringe: KLOEHN company, 17598.
If the present invention does corresponding change with the size of optocoupler and anchor clamps, can test the volume of the volumescope buret of different size, need to determine tested volume less than the syringe maximum volume, otherwise as long as change the syringe of bigger specification again.
Method of testing of the present invention not only at the test of volumescope buret volume, and can be applied to various special-shaped containers, the volume test of small container.
As seen, adopt the high-precision automatic method of testing and the device of volumescope buret volume of the present invention, possess following advantage:
1. accurate: method of testing of the present invention has been evaded fully because the test error that the shape of volumescope buret own is brought;
2. reliable: the present invention adopts single-chip microcomputer to finish all data processing, adds various reliability measures in the control, does not need artificial calculating and control;
3. quick: the test that the present invention finishes a volumescope buret only needs 1 fen kind, and simple to operate, has strengthened efficient greatly.
Thinking of the present invention is: the test conversion of volumescope buret volume is the quantitative test to accurate liquid volume; Further, with imbibition of step motor drive syringe and discharge opeing, detect liquid level, control all mechanisms and handle all data, promptly precisely efficient again with microprocessor with optocoupler.Based on above thinking the disclosed most preferred embodiment of the present invention is not had creationary simple replacement, change, or do further invention, all belong to the present invention's enforcement.
Claims (8)
1, a kind of high-precision automatic method of testing of volumescope buret volume is characterized in that, comprises step:
1., the one liquid start bit detecting device and a liquid stop bit detecting device of tested volume gauge line are set;
2., a liquid capacity reference source is set, the volume of this reference source is greater than the volume of tested volume gauge line, but and controlled change;
3., a test liquid reservoir vessel is set;
4., a test liquid collection container is set;
5., a control module is set;
6., be provided with and connect test with liquid reservoir vessel and liquid capacity reference source, liquid capacity reference source and the pipeline of test with liquid collection container and liquid capacity reference source and tested volume gauge line, contain in this pipeline and receive control module and instruct the parts that carry out the pipeline switching;
7., described control module action, test is transported to reference source with liquid by reservoir vessel, be transported to tested volume gauge line by reference source again, after moving first to liquid stop bit detecting device, continuation is transported to tested volume gauge line with the test of an amount of redundancy with liquid, test is transmitted back to reference source with liquid by tested volume gauge line then, when moving once more, liquid stop bit detecting device begins metering, move to liquid start bit detecting device, tenth skill, metering finishes, and this metering result is a measured value of the volume of tested volume gauge line;
8., 7. described step carry out repeatedly, correspondingly obtains repeatedly measured value; And abandon primary measured value, get the mean value of other residue time measured value, as the test result of the volume of tested volume gauge line;
9., the value for coefficient of variation of 8. described other residue time measured value of calculation procedure, if this value confirm that described test result is effective, otherwise described test result is invalid in the scope of setting.
2, the high-precision automatic method of testing of volumescope buret volume as claimed in claim 1 is characterized in that:
The 6. middle control module that receives of described step instructs the parts that carry out the pipeline switching to refer to solenoid valve.
3, as the high-precision automatic method of testing of claim 1 or 2 described volumescope buret volumes, it is characterized in that:
Described liquid capacity reference source is a syringe.
4, the high-precision automatic method of testing of volumescope buret volume as claimed in claim 3 is characterized in that:
Described control module comprises a stepper motor, driving circuit, control circuit and motor transmission mechanism, and described gear train is converted into moving of syringe piston to the action of motor.
5, the high-precision automatic method of testing of volumescope buret volume as claimed in claim 4 is characterized in that:
Described control circuit comprises a microprocessor.
6, the high-precision automatic method of testing of volumescope buret volume as claimed in claim 5 is characterized in that:
Described step metering process 7. comprises the action by microprocessor control step motor, and stepper motor is added up at the action frequency that begins to be metered between the metering end, and microprocessor is calculated the metering result according to this accumulative total again.
7, the high-precision automatic method of testing of volumescope buret volume as claimed in claim 3 is characterized in that:
Described liquid start bit detecting device and liquid stop bit detecting device all adopt optocoupler to detect liquid level.
8, realize the device of the high-precision automatic method of testing of the described volumescope buret of claim 1 volume, it is characterized in that, comprising:
Be arranged on a liquid start bit detecting device and a liquid stop bit detecting device at tested volume gauge line place;
One liquid capacity reference source, the volume of this reference source is greater than the volume of tested volume gauge line, but and controlled change;
One test liquid reservoir vessel;
One test liquid collection container;
One control module;
Connect test and use liquid reservoir vessel and liquid capacity reference source, liquid capacity reference source and test, contain in this pipeline and accept the parts that the pipeline switching is carried out in the control module instruction with the pipeline of liquid collection container and liquid capacity reference source and tested volume gauge line;
Described liquid start bit detecting device links to each other with control module with liquid stop bit detecting device, and, described control module is transported to reference source to test with liquid by reservoir vessel, be transported to tested volume gauge line by reference source again, after moving first to liquid stop bit detecting device, continuation is transported to tested volume gauge line with the test of an amount of redundancy with liquid, then test is transported to reference source with liquid by tested volume gauge line, when moving once more, liquid stop bit detecting device begins metering, move to liquid start bit detecting device, finish metering, this metering result is a measured value of the volume of tested volume gauge line.
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| CNB2004100524658A CN100338441C (en) | 2004-11-23 | 2004-11-23 | High-precision automatic testing method and device for volume metering tube |
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| CNB2004100524658A CN100338441C (en) | 2004-11-23 | 2004-11-23 | High-precision automatic testing method and device for volume metering tube |
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| CN100338441C true CN100338441C (en) | 2007-09-19 |
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| CN106092278A (en) * | 2016-07-22 | 2016-11-09 | 蚌埠大洋传感系统工程有限公司 | A kind of flow transducer intelligent checking system |
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| CN106768203B (en) * | 2016-12-28 | 2023-05-23 | 新乡航空工业(集团)有限公司 | Combined active piston liquid flow standard device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895519A (en) * | 1974-06-25 | 1975-07-22 | Mcnay Equipment Company Inc | Electronic control system for fluid measurement of a closed air space |
| US4546648A (en) * | 1982-10-14 | 1985-10-15 | Robert Bosch Gmbh | Arrangement for measuring injection quantities |
| US5608157A (en) * | 1995-10-18 | 1997-03-04 | Micromeritics Instrument Corporation | Method and apparatus for measuring envelope density |
| DE3250126C2 (en) * | 1981-11-04 | 1998-01-22 | Denso Corp | Metering device for engine fuel injection system |
| US5801308A (en) * | 1996-03-07 | 1998-09-01 | Denso Corporation | Measuring apparatus for measuring an injected quantity of liquid |
-
2004
- 2004-11-23 CN CNB2004100524658A patent/CN100338441C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895519A (en) * | 1974-06-25 | 1975-07-22 | Mcnay Equipment Company Inc | Electronic control system for fluid measurement of a closed air space |
| DE3250126C2 (en) * | 1981-11-04 | 1998-01-22 | Denso Corp | Metering device for engine fuel injection system |
| US4546648A (en) * | 1982-10-14 | 1985-10-15 | Robert Bosch Gmbh | Arrangement for measuring injection quantities |
| US5608157A (en) * | 1995-10-18 | 1997-03-04 | Micromeritics Instrument Corporation | Method and apparatus for measuring envelope density |
| US5801308A (en) * | 1996-03-07 | 1998-09-01 | Denso Corporation | Measuring apparatus for measuring an injected quantity of liquid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344778A (en) * | 2013-06-17 | 2013-10-09 | 孙卫国 | Microsample injection apparatus and sample injection method |
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| CN1779421A (en) | 2006-05-31 |
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