CN207703282U - A kind of fine liquid flow measurement device based on displacement measurement - Google Patents
A kind of fine liquid flow measurement device based on displacement measurement Download PDFInfo
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- CN207703282U CN207703282U CN201820016885.8U CN201820016885U CN207703282U CN 207703282 U CN207703282 U CN 207703282U CN 201820016885 U CN201820016885 U CN 201820016885U CN 207703282 U CN207703282 U CN 207703282U
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Abstract
The utility model discloses a kind of fine liquid flow measurement device based on displacement measurement, including bottom plate and the device body that is arranged on bottom plate by fixing device；Device body is tubular structure, and left end connects inlet；The piston being slidably matched with its inner wall is provided in device body；It further include the displacement sensor for measuring piston opposite sets body displacement；It is high, simple in structure, easy to use that the utility model measures time-consuming accuracy that is short, measuring flow.
Description
Technical field
The utility model is related to infusion pump/injection pump measuring instruments, and in particular to one kind is surveyed for infusion pump/injection pump flow
The small amount of flow measuring device based on displacement measurement of amount.
Background technology
Clinically micrometeor infusion techn is mainly used on the therapeutic equipments such as infusion pump in medical application, syringe pump, extensive use
In the injection medical act of the liquids such as nutrition supply, blood transfusion, anticancer agent, anticoagulant and anesthetic；Micrometeor infusion skill
Art can accurately control number of infusion drops and flow, ensure that drug at the uniform velocity, accurately, safely can enter to play in patient body and make
With；It realizes the liquid mode of high-precision, steady pulse free, improves efficiency and the flexibility of clinical administration operation, reduce nursing work
It measures；Infusion pump in medical application, syringe pump are widely used on clinical treatment, and equipment Risk mostlys come from instrument performance quality itself
Risk, carrying out quality control to pump housing output flow has necessity.
Infusion pump/injection pump detector production unit has in the FLUKE, Canadian DATREND and Sichuan in the U.S. at present
Survey radiation Science and Technology Ltd.；Above-mentioned three company has product in market sale；FLUKE companies and middle survey radiation science and technology are limited
Company realizes small amount of flow measuring using infrared tube Detection Techniques；Canadian DATREN companies are measured using microsampling technology
Flow；Time-consuming to small amount of flow measuring for existing measuring device, is unfavorable for the flow of the daily infusion pump of hospital, syringe pump
Quality Control works；The best infusion pump/injection pump detector of market sale performance index needs about 2 when testing 5mL/h flows
Minute, worst needs 10 minutes or so, time-consuming；And its measurement error is larger, and accuracy is poor.
Utility model content
The utility model provides a kind of shorter small amount of flow measuring device based on displacement measurement simple in structure, time-consuming.
The technical solution adopted in the utility model is：A kind of fine liquid flow measurement device based on displacement measurement, packet
The device body for including bottom plate and being arranged on bottom plate by fixing device；Device body is tubular structure, and left end connects inlet；
The piston being slidably matched with its inner wall is provided in device body；Further include for measuring piston opposite sets body displacement
Displacement sensor.
Further, institute's displacement sensors are tangent displacement sensor, perception head and the device sheet of displacement sensor
The axis of body is located at same straight line.
Further, institute's displacement sensors are fixed at by the second fixing device on bottom plate.
Further, the perception head corresponding position of institute's displacement sensors is provided with pushing block, and pushing block lower part, which is provided with, to be used for
The sliding block of fixed pushing block；Sliding block is arranged on the linear module on bottom plate；Head contact piston is perceived far from inlet one end.
Further, institute's displacement sensors are laser without contact sensor, the laser rays and device of displacement sensor
Body axis is located at same straight line.
The utility model has the beneficial effects that：
(1) the utility model measures time-consuming short, instantaneous flow value can be obtained at 1 second, measured value reaches steady after 10 seconds
It is fixed；
(2) after utility model device ontology internal diameter is calibrated, measurement error is smaller, improves and measures the accurate of flow
Property；
(3) letter of the utility model structure is answered, is easy to operate, is applicable to all infusion pump and syringe pump.
Description of the drawings
Fig. 1 is the sectional view of utility model device.
Fig. 2 is utility model device dimensional structure diagram.
In figure：1- bottom plates, 2- risers, 3- displacement sensors, the linear modules of 4-, 5- sliding blocks, 6- pushing blocks, 7- device bodies,
8- pistons, 9- fixed blocks, the first upper mounted plates of 10-, 11- bottom plates, the second upper mounted plates of 12-, 13- inlets.
Specific implementation mode
The utility model is described further in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of fine liquid flow measurement device based on displacement measurement, including bottom plate 1 and pass through fixation
The device body 7 on bottom plate 1 is arranged in device；Device body 7 is tubular structure, and left end connects inlet 13；In device body 7
It is provided with the piston 8 being slidably matched with its inner wall；Further include being passed for measuring the displacement of 8 opposite sets ontology of piston, 7 displacement
Sensor 3.
In use, inlet 13, which connects, needs the infusion pump or syringe pump of detection flows, liquid after full of inlet 13,
The liquid under pressure of infusion pump or syringe pump enters inside device body 7；It shifts piston 8 onto to move to the right, be passed by displacement
Sensor 3 measures the displacement L of piston 8.
Further, institute's displacement sensors 3 are tangent displacement sensor, the perception head and device of displacement sensor 3
The axis of ontology 7 is located at same straight line；It can guarantee the accuracy that displacement sensor 3 measures.
Further, institute's displacement sensors 3 are fixed at by the second fixing device on bottom plate 1；Second fixes dress
It is set to the case structure being made of riser 2, bottom plate 11 and the second upper mounted plate 12；The perception head of displacement sensor 3 swashs
Optical transmitting set stretches out outside the second fixing device.
Further, the perception head corresponding position of institute's displacement sensors 3 is provided with pushing block 6, and the setting of 6 lower part of pushing block is useful
In the sliding block 5 of fixed pushing block 6；Sliding block 5 is arranged on the linear module 4 on bottom plate 1；Perceive head contact piston 8 far from into
13 one end of liquid mouth；Through-hole is provided on pushing block 6 with perception head corresponding position, perception head is contacted across the through-hole with piston 8；Piston
8 move right under the pressure of liquid, while perception head being driven to move right, and obtain the displacement of piston 8.
Further, institute's displacement sensors 3 are laser without contact sensor, the laser rays and dress of displacement sensor 13
It sets 7 axis of ontology and is located at same straight line.
A kind of fine liquid flow-measuring method based on displacement measurement, includes the following steps：
7 internal diameter of device body is calibrated；
Inlet 13 connects syringe pump or infusion pump；
The displacement L in 8 unit interval of piston t and the accumulative displacement amount in the cumulative time are obtained by displacement sensor 3
LT；
Calculate the instantaneous flow ν of liquid：
In formula：R is the internal diameter of device body 7；T is the unit time；
Calculate the integrated flow value V in liquid cumulative time T：
V=π × R × R × LT。
More accurate in order to measure, the syringe of standard syringe can be used in device body 7, and piston 8 uses standard syringe
Piston, inlet 13 be syringe pull out syringe needle and syringe connecting portion；Its internal diameter of standard syringe is maximum through measurement and calibration
Allowable error is less than 0.001mm, and it is more accurate to measure；The contact displacement that existing market sale can be used in displacement sensor 3 passes
Sensor or laser without contact sensor；The perception probe of tangent displacement sensor will obtain standard syringe piston
Displacement；In use, the displacement sensor 3 in utility model device is connected microcontroller；Microcontroller is by the unit interval
The displacement of inner carrier 8 determines, the instantaneous flow value for obtaining liquid, accumulative stream can be calculated according to the internal diameter size of standard syringe
Magnitude；Similarly, the position of standard syringe piston is obtained according to reflection interval using the laser of laser without contact displacement sensor
Shifting amount, and then calculate instantaneous flow value, the integrated flow value for obtaining liquid.
Existing product small amount of flow measuring takes too long, is unfavorable for the flow matter of the daily infusion pump of hospital, syringe pump
Control work；The best infusion pump syringe pump detector of market sale performance index needs about 2 points when testing 5mL/h flows
Clock, worst needs 10 minutes or so；And the measuring device and method that the utility model is proposed can obtain instantaneous stream at 1 second
Magnitude, measured value reaches stable after 10 seconds；Sell the best infusion pump syringe pump detector flow of performance indicator in existing market
It is 1% to detect the limits of error, but the maximum of measuring device and measurement method better than 1% that the utility model is proposed permits
Perhaps error, 10ml/h to the 1000ml/h stages it is maximum allowable can reach 0.5%, improve measure flow accuracy.
Since displacement sensor 3 is high precision position detecting apparatus, small vibrations will all cause sensor signal to change,
So can acceleration transducer be introduced the present apparatus in the later stage is arranged；It, will if detecting vibration signal in measurement process
The displacement that displacement sensor 3 obtains can be rejected, improve the stability for measuring displacement.
Claims (5)
1. a kind of fine liquid flow measurement device based on displacement measurement, which is characterized in that including bottom plate (1) and pass through fixation
The device body (7) that device is arranged on bottom plate (1)；Device body (7) is tubular structure, and left end connects inlet (13)；Dress
It sets in ontology (7) and is provided with the piston (8) being slidably matched with its inner wall；Further include for measuring piston (8) opposite sets ontology
(7) displacement sensor (3) of displacement.
2. a kind of fine liquid flow measurement device based on displacement measurement according to claim 1, which is characterized in that institute
Displacement sensors (3) are tangent displacement sensor, the axis position of the perception head and device body (7) of displacement sensor (3)
In same straight line.
3. a kind of fine liquid flow measurement device based on displacement measurement according to claim 1, which is characterized in that institute
Displacement sensors (3) are fixed at by the second fixing device on bottom plate (1).
4. a kind of fine liquid flow measurement device based on displacement measurement according to claim 2, which is characterized in that institute
The perception head corresponding position of displacement sensors (3) is provided with pushing block (6), and pushing block (6) lower part is provided with for fixing pushing block (6)
Sliding block (5)；Sliding block (5) is arranged on the linear module (4) on bottom plate (1)；Head contact piston (8) is perceived far from feed liquor
Mouth (13) one end.
5. a kind of fine liquid flow measurement device based on displacement measurement according to claim 1, which is characterized in that institute
Displacement sensors (3) are laser without contact sensor, laser rays and device body (7) axis position of displacement sensor (3)
In same straight line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820016885.8U CN207703282U (en) | 2018-01-05 | 2018-01-05 | A kind of fine liquid flow measurement device based on displacement measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820016885.8U CN207703282U (en) | 2018-01-05 | 2018-01-05 | A kind of fine liquid flow measurement device based on displacement measurement |
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| CN207703282U true CN207703282U (en) | 2018-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168637A (en) * | 2018-01-05 | 2018-06-15 | 杨勇 | A kind of fine liquid flow measurement device and measuring method based on displacement measurement |
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2018
- 2018-01-05 CN CN201820016885.8U patent/CN207703282U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168637A (en) * | 2018-01-05 | 2018-06-15 | 杨勇 | A kind of fine liquid flow measurement device and measuring method based on displacement measurement |
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