CN108458760A - Wriggling pump flow rate detection apparatus and detection method - Google Patents
Wriggling pump flow rate detection apparatus and detection method Download PDFInfo
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- CN108458760A CN108458760A CN201810078782.9A CN201810078782A CN108458760A CN 108458760 A CN108458760 A CN 108458760A CN 201810078782 A CN201810078782 A CN 201810078782A CN 108458760 A CN108458760 A CN 108458760A
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- fluid path
- fluid
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- peristaltic pump
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
Abstract
The present invention is more particularly directed to a kind of wriggling pump flow rate detection apparatus and detection methods, the device includes that detection liquid generates unit, first photodetector unit, second photodetector unit and processing unit, the detection liquid generates unit and is connected with peristaltic pump by light-transmission tube, detection liquid generates the fluid path that unit generates and is composed of a section fluid column, first, second photodetector unit is for detecting the light transmittance of fluid column in light-transmission tube and exporting electric signal to processing unit, processing unit is according to the internal diameter of light-transmission tube, the test point spacing of first photodetector unit and the second photodetector unit, the light transmittance transformation period difference that first photodetector unit and the second photodetector unit detect calculates the flow of peristaltic pump.The flow of peristaltic pump, also, the light-transmission tube by selecting different inner diameters can be very easily calculated, realizes large range of range, program precision is very high, and time of measuring is fast, it is most important that can be measured in real time.
Description
Technical field
The present invention relates to flow velocity field of measuring technique, more particularly to a kind of wriggling pump flow rate detection apparatus and detection method.
Background technology
Peristaltic pump is a kind of common fluid delivery system, and principle is by alternately squeezing elastic delivery hose
Carry out trandfer fluid with release, has many advantages, such as that pollution-free, the high and low shearing force of precision, good airproof performance, maintenance are simple.Peristaltic pump makes
It is exactly the flow velocity of liquid with an important parameter in the process.In conventional methods where, generally come using volumetric method or weight method
Calculate the mean flow rate of peristaltic pump within a certain period of time.Volumetric method is generally used for the occasion of high flow velocities, by measuring one section
The volume of the liquid flowed out from peristaltic pump flow path in time, to calculate the flow velocity of peristaltic pump, volumetric method has the following disadvantages：Its
One, it is not applied for the lower occasion of flow velocity；Second, can have error when due to liquid capacity-fixed, after constant volume
Volume will produce error again when calculating flow velocity, and the result precision being finally calculated is not high.Weight method is generally used for low stream
Fast field, due to low flow velocity occasion, error is too many caused by liquid capacity-fixed, so using weight method instead to calculate the conveying of liquid
Amount, under the premise of using high-precision level, weight method is more accurate compared to volumetric method.But in lower flow velocity occasion, than
Such as microlitre order of magnitude, the measurement period of weight method is long, needs artificial on duty.Meanwhile whether volumetric method or weight method, it surveys
What is measured is all the mean flow rate in certain time, can not achieve the detection of peristaltic pump change in flow.
Invention content
The primary purpose of the present invention is that providing a kind of wriggling pump flow rate detection apparatus, can examine accurately and fast, in real time
Survey wriggling pump discharge.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of wriggling pump flow rate detection apparatus, including detection
Liquid generates unit, the first photodetector unit, the second photodetector unit and processing unit, and the detection liquid generates unit
It is connected with peristaltic pump by light-transmission tube, detection liquid generates the fluid path that unit generates and is composed of a section fluid column, and first, second
Photodetector unit is for detecting the light transmittance of fluid column in light-transmission tube and exporting electric signal to processing unit, and processing unit is according to thoroughly
The test point spacing of the internal diameter of light pipe, the first photodetector unit and the second photodetector unit, the first photodetector unit and
The light transmittance transformation period difference that second photodetector unit detects calculates the flow of peristaltic pump.
Compared with prior art, there are following technique effects by the present invention：Liquid is detected by setting and generates unit, generates one section
Section fluid column, the fluid column of segmentation has apparent difference in intersection, by will produce apparent signal intensity when photodetector unit,
Then the signal intensity is just able to detect that by the first, second photodetector unit being arranged in fluid path and can got
Transformation period is poor, thus can very easily calculate the flow of peristaltic pump, also, the light-transmission tube by selecting different inner diameters,
Realize large range of range, program precision is very high, and time of measuring is fast, it is most important that can be measured in real time.
It is another object of the present invention to provide a kind of peristaltic pump flow rate testing methods, can accurately and fast, in real time
Detect wriggling pump discharge.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of peristaltic pump flow rate testing methods include as follows
Step：(A) peristaltic pump for measuring flow velocity will be needed to install pump line and accesses detection device；(B) start peristaltic pump, for use fluid path exists
It is moved along light-transmission tube under the action of peristaltic pump；(C) when two neighboring fluid column intersection is by the first, second photodetector unit,
First, second photodetector unit detects that light transmittance changes, and processing unit is exported according to the first and second photodetector unit
Signal calculate two neighboring fluid column intersection and pass through the time t used in the first, second photodetector unit；(D) processing unit
The flow velocity v of peristaltic pump is calculated according to following formula：V=π r2L/t, wherein r are the half of light transmission bore, L first, the
Two photodetector unit test point spacing.
Compared with prior art, there are following technique effects by the present invention：Liquid is detected by setting and generates unit, generates one section
Section fluid column, the fluid column of segmentation has apparent difference in intersection, by will produce apparent signal intensity when photodetector unit,
Then the signal intensity is just able to detect that by the first, second photodetector unit being arranged in fluid path and can got
Transformation period is poor, thus can very easily calculate the flow of peristaltic pump, also, the light-transmission tube by selecting different inner diameters,
Realize large range of range, program precision is very high, and time of measuring is fast, it is most important that can be measured in real time.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention two.
Specific implementation mode
With reference to Fig. 1 and Fig. 2, the present invention is described in further detail.
Refering to fig. 1, a kind of wriggling pump flow rate detection apparatus, including detection liquid generate unit, the first photodetector unit 11,
Second photodetector unit 12 and processing unit 13, the detection liquid generate unit and pass through light-transmission tube 14 and 70 phase of peristaltic pump
Even, detection liquid generates the fluid path that unit generates and is composed of a section fluid column, and the first, second photodetector unit 11,12 is used
In the light transmittance of fluid column in detection light-transmission tube 14 and electric signal is exported to processing unit 13, and processing unit 13 is according to light-transmission tube 14
Internal diameter, the test point spacing of the first photodetector unit 11 and the second photodetector unit 12,11 and of the first photodetector unit
The light transmittance transformation period difference that second photodetector unit 12 detects calculates the flow of peristaltic pump 70.Liquid is detected by setting
Unit is generated, generates a section fluid column, the fluid column of segmentation has apparent difference in intersection, by that can be produced when photodetector unit
Raw apparent signal intensity, is then just able to detect that by the first, second photodetector unit 11,12 being arranged in fluid path
It the signal intensity and can get that transformation period is poor, thus can very easily calculate the flow of peristaltic pump 70, also, logical
The light-transmission tube for selecting different inner diameters is crossed, realizes large range of range, program precision is very high, and time of measuring is fast, most important
Be that can be measured in real time.
In order to ensure that the light transmittance that photodetector unit detects has significant change, fluid path to be measured to need apparent point
Boundary, no matter the fluid column of how many color is arranged, as long as ensureing that the color distortion of two neighboring fluid column is larger.Excessive color is set
Fluid column, the complexity of system is on the one hand provided, on the other hand without this necessity, so in the present embodiment preferably, institute
The fluid path that detection liquid generation unit generates to be stated to be composed of two kinds of fluid columns, the color of two kinds of fluid columns is different and immiscible each other,
Intersection can become apparent from this way, be more advantageous to detection.Two kinds of fluid column arranged for interval and every section of fluid column is isometric.
There are many kinds of the structures for detecting liquid generation unit, and two kinds of specific embodiments are provided for reference in the present invention.
Embodiment one prestores as shown in Figure 1, it is liquid storage pipe 20 that the detection liquid, which generates unit, in liquid storage pipe 20
Good for use fluid path, liquid storage pipe 20 can process many models, including a variety of internal diameters, different lengths, then selection as needed
Suitable liquid storage pipe 20 is connected on light-transmission tube 14, then starts peristaltic pump 70.When actual processing, liquid storage pipe 20 and light transmission
Pipe 14 is Demountable, i.e. the two is independent mutually, can arbitrarily split, combine；Or it is integrally machined.
Embodiment two, as shown in Fig. 2, it includes the first fluid reservoir 30, the second fluid reservoir 40 that the detection liquid, which generates unit,
And fluid path handover module 50, the first fluid reservoir 30 and the second fluid reservoir 40 pass through fluid path handover module 50 and 70 phase of peristaltic pump
Even, fluid path handover module 50 is connected with peristaltic pump 70 for controlling the first fluid reservoir 30 or the second fluid reservoir 40 and peristaltic pump
70 are connected to generate for use fluid path.When first fluid reservoir 30 is connected with peristaltic pump 70, peristaltic pump 70 is drawn into light-transmission tube 14
In be the fluid stored in the first fluid reservoir 30, when the second fluid reservoir 40 is connected with peristaltic pump 70, peristaltic pump 70 is drawn into
In light pipe 14 is the fluid stored in the second fluid reservoir 40, can be achieved with required fluid path in this way, and be very easy to implement,
And it can continually provide required fluid path.
Preferably, the fluid path handover module 50 includes miniature electromagnetic valve 51 and fluid path transfer block 52；Miniature electromagnetic valve
51 be the LVM125 type solenoid valves of SMC, this solenoid valve is small, low in energy consumption, and valve body cavity is minimum, substantially without dead volume, no
Easy hydrops can effectively prevent mutual vadose solution of the two-way liquid in valve body.Fluid path transfer block 52 is whole in bulk, fluid path switching
The first fluid path channel 521, the second fluid path channel 522 and liquid outlet channel 523, the first fluid path channel 521, second are provided in block 52
Fluid path channel 522 and one end of liquid outlet channel 523 all extend to micro- for connecting on one of fluid path transfer block 52 side
Type solenoid valve 51, the smooth-sided compression candles of fluid path transfer block 52, solenoid valve can pass through the O-ring and electromagnetic valve body at fluid path through-hole edge
Mounting hole be fixed in fluid path transfer block 52 with thread seal.First fluid path channel 521, the second fluid path channel 522 and go out liquid
The other end in channel 523 extends respectively on other sides of fluid path transfer block 52 and the other end in the first fluid path channel 521 connects
Lead to the first fluid reservoir 30, the other end in the second fluid path channel 522 is connected to the second fluid reservoir 40, liquid outlet channel 523 passes through light-transmission tube
14 connection peristaltic pumps 70.After fluid path transfer block 52 is set, facilitate the connection between each component.
Preferably, including mounting blocks 15, mounting blocks 15 are made of light-proof material, and mounting blocks 15 are provided centrally with through-hole confession
Light-transmission tube 14 passes through；First, second photodetector unit 11,12 is the optical coupled switch of U-shaped structure and is stuck in by U-type groove
It realizes and fixes on mounting blocks 15, the signal transmitting terminal and signal receiving end of optical coupled switch be oppositely arranged on U-shaped structure two are straight
On the inside of side, loophole 151 is provided with for light in the light path on mounting blocks 15 between signal transmitting terminal and signal receiving end
Pass through, the diameter of loophole 151 is less than or equal to the internal diameter of light-transmission tube 14, optocoupler signal can be prevented from light-transmission tube 14 in this way
Side pipe wall penetrates and causes to judge by accident.Mounting blocks 15 are set, it may be convenient to 14 and first, second photodetector unit of fixed light-transmission tube
11、12。
As the preferred embodiment of the present invention, the fluid path transfer block 52 is made of PTFE material, and liquid outlet channel 523 will use up
Possible short, its length is less than or equal to 1cm in the present invention.The size of light-transmission tube 14 can be selected according to actual demand, flow
Smaller pump, 14 internal diameter of light-transmission tube is smaller, and in the present invention, the light-transmission tube 14 is that the PFA of thin pipe wall is managed, 14 length of light-transmission tube
It is 0.5~1mm for 3~5cm, bore, under the premise of ensureing that transparency liquid can be penetrated normally by time coupling signal, to the greatest extent
Amount reduces the internal diameter of light-transmission tube 14, to ensure the movement speed of the fluid column when low flow velocity detects, improves detection sensitivity.First
Black liquor is stored in fluid reservoir 30, black liquor can select diluted black ink, be stored in the second fluid reservoir 40 saturating
Prescribed liquid, transparency liquid can select deionized water, both liquid intersolubilities are poor, and inspection time difference method is very good.Peristaltic pump 70
Output end be provided with third fluid reservoir 60 for collecting waste liquid, avoid waste liquid from discharging everywhere and pollute.
Preferably, the present invention also provides a kind of detection methods of foregoing wriggling pump flow rate detection apparatus, including such as
Lower step：(A) peristaltic pump 70 for measuring flow velocity will be needed to install pump line and accesses detection device；(B) start peristaltic pump 70, for use
Fluid path moves under the action of peristaltic pump 70 along light-transmission tube 14；(C) two neighboring fluid column intersection is examined by the first, second photoelectricity
When surveying unit 11,12, the first, second photodetector unit 11,12 detects that light transmittance changes, and processing unit 13 is according to the
One, the two neighboring fluid column intersection of signal calculating of two photodetector units 11,12 output passes through the first, second Photoelectric Detection list
Time t used in member 11,12；(D) processing unit 13 calculates the flow velocity v of peristaltic pump 70 according to following formula：V=π r2L/t,
Wherein r is the half of 14 internal diameter of light-transmission tube, and L is the first, second photodetector unit 11,12 test point spacing.By walking above
Suddenly, it may be convenient to detect the flow velocity of peristaltic pump 70, which is automatic, and processing method is also relatively more succinct, operation
It measures small.
In embodiment two, because being provided with miniature electromagnetic valve 51, therefore before performing stepb, micro electromagnetic is first controlled
Valve 51 is switched on or off with fixed frequency.This frequency can be pre-set, and under the frequency, the fluid column in light-transmission tube 14 is not
Can it is too short, can not be long, if too short, precision is not high, and if long, time of measuring is too long, selection suitable frequency when detection
Rate.
Preferably, it is stored with diluted black ink in first fluid reservoir 30, is stored in the second fluid reservoir 40 white
The deionized water of color；Time t is calculated as follows in the step C：When the front end of black fluid column is examined by the first photoelectricity
When surveying the loophole 151 at 11 position of unit, black fluid column can stop the light path of the first photodetector unit 11, the first light
The output signal of electro-detection unit 11 becomes low level from high level；Black fluid column continues to move to, when the front end of black fluid column is logical
When crossing the loophole 151 at 12 position of the second photodetector unit, black fluid column can stop the inspection of the second photodetector unit 12
Light path is surveyed, the output signal of the second photodetector unit 12 becomes low level from high level；Processing unit 13 is obtained by timer
Time difference to two signal failing edges is time t.It is of course also possible to be counted by the time by white fluid column
Calculate, at this time, it may be necessary to detect be two signal rising edges time difference.Two signal failing edges and rising edge can also be detected simultaneously
Time difference, specific practice is as follows：Stream is calculated according to first black fluid column namely first failing edge time difference t1
Measure v1；Flow v2 is calculated according to first white fluid column namely first rising time difference t2；It is black according to second
Flow v3 is calculated in color fluid column namely second failing edge time difference t3；And so on, detecting frequency in this way can be faster.
Claims (10)
1. a kind of wriggling pump flow rate detection apparatus, it is characterised in that：Unit, the first photodetector unit are generated including detection liquid
(11), the second photodetector unit (12) and processing unit (13), the detection liquid generate unit and pass through light-transmission tube (14)
It is connected with peristaltic pump (70), detection liquid generates the fluid path that unit generates and is composed of a section fluid column, the inspection of the first, second photoelectricity
Unit (11,12) is surveyed to be used to detect the light transmittance of light-transmission tube (14) interior fluid column and export electric signal to processing unit (13), processing
Unit (13) is according to the detection of the internal diameter, the first photodetector unit (11) and the second photodetector unit (12) of light-transmission tube (14)
The light transmittance transformation period difference that point spacing, the first photodetector unit (11) and the second photodetector unit (12) detect calculates
Go out the flow of peristaltic pump (70).
2. wriggling pump flow rate detection apparatus as described in claim 1, it is characterised in that：The detection liquid generates what unit generated
Fluid path is composed of two kinds of fluid columns, and the color of two kinds of fluid columns is different and immiscible each other, two kinds of fluid column arranged for interval and every section
Fluid column is isometric.
3. wriggling pump flow rate detection apparatus as claimed in claim 1 or 2, it is characterised in that：The detection liquid generates unit
For liquid storage pipe (20), liquid storage pipe (20) is interior to have prestored for use fluid path, and liquid storage pipe (20) and light-transmission tube (14) are detachable
Structure is integrally machined.
4. wriggling pump flow rate detection apparatus as claimed in claim 1 or 2, it is characterised in that：The detection liquid generates unit
Including the first fluid reservoir (30), the second fluid reservoir (40) and fluid path handover module (50), the first fluid reservoir (30) and the second storage
Flow container (40) is connected by fluid path handover module (50) with peristaltic pump (70), and fluid path handover module (50) is for controlling the first storage
Flow container (30) is connected with peristaltic pump (70) or the second fluid reservoir (40) is connected to generate for use liquid with peristaltic pump (70)
Road.
5. wriggling pump flow rate detection apparatus as claimed in claim 4, it is characterised in that：Fluid path handover module (50) packet
Include miniature electromagnetic valve (51) and fluid path transfer block (52)；Miniature electromagnetic valve (51) is the LVM125 type solenoid valves of SMC；Fluid path is transferred
Block (52) be integrally provided in bulk, in fluid path transfer block (52) the first fluid path channel (521), the second fluid path channel (522) and
One end of liquid outlet channel (523), the first fluid path channel (521), the second fluid path channel (522) and liquid outlet channel (523) extends
For connecting miniature electromagnetic valve (51), the first fluid path channel (521), second on to one of fluid path transfer block (52) side
The other end of fluid path channel (522) and liquid outlet channel (523) extends respectively on other sides of fluid path transfer block (52) and
The other end in one fluid path channel (521) is connected to the second storage of other end connection of the first fluid reservoir (30), the second fluid path channel (522)
Flow container (40), liquid outlet channel (523) are connected to peristaltic pump (70) by light-transmission tube (14).
6. wriggling pump flow rate detection apparatus as claimed in claim 5, it is characterised in that：Including mounting blocks (15), mounting blocks
(15) it is made of light-proof material, mounting blocks (15) are provided centrally with through-hole and are passed through for light-transmission tube (14)；First, second light
Electro-detection unit (11,12) is the optical coupled switch of U-shaped structure and is stuck in realization fixation, optocoupler on mounting blocks (15) by U-type groove
The signal transmitting terminal and signal receiving end of switch are oppositely arranged on the inside of two straight flanges of U-shaped structure, and mounting blocks are located on (15)
Loophole (151) is provided in light path between signal transmitting terminal and signal receiving end for light to pass through, loophole (151) it is straight
Diameter is less than or equal to the internal diameter of light-transmission tube (14).
7. wriggling pump flow rate detection apparatus as claimed in claim 5, it is characterised in that：The fluid path transfer block (52) is
PTFE material is made, and liquid outlet channel (523) length is less than or equal to 1cm；The light-transmission tube (14) is that the PFA of thin pipe wall is managed,
Light-transmission tube (14) length is 3~5cm, bore is 0.5~1mm；Black liquor, the second storage are stored in first fluid reservoir (30)
Flow container is stored with transparency liquid in (40)；The output end of peristaltic pump (70) is provided with third fluid reservoir (60) for collecting waste liquid.
8. a kind of detection method of wriggling pump flow rate detection apparatus as described in claim 1, includes the following steps：
(A) peristaltic pump (70) for measuring flow velocity will be needed to install pump line and accesses detection device；
(B) start peristaltic pump (70), for use fluid path is mobile along light-transmission tube (14) under the action of peristaltic pump (70)；
(C) when two neighboring fluid column intersection is by the first, second photodetector unit (11,12), the first, second Photoelectric Detection
Unit (11,12) detects that light transmittance changes, and processing unit (13) is defeated according to the first and second photodetector unit (11,12)
The signal gone out calculates two neighboring fluid column intersection and passes through the time t used in the first, second photodetector unit (11,12)；
(D) processing unit (13) calculates the flow velocity v of peristaltic pump (70) according to following formula：V=π r2L/t, wherein r are light-transmission tube
(14) half of internal diameter, L are the first, second photodetector unit (11,12) test point spacing.
9. peristaltic pump flow rate testing methods as claimed in claim 8, it is characterised in that：The detection liquid generates unit
First fluid reservoir (30), the second fluid reservoir (40) and fluid path handover module (50), the fluid path handover module (50) include
Miniature electromagnetic valve (51) and fluid path transfer block (52)；Miniature electromagnetic valve (51) is the LVM125 type solenoid valves of SMC；Fluid path transfer block
(52) whole in bulk, fluid path transfer block (52) is interior to be provided with the first fluid path channel (521), the second fluid path channel (522) and goes out
The one end in liquid channel (523), the first fluid path channel (521), the second fluid path channel (522) and liquid outlet channel (523) all extends to
For connecting miniature electromagnetic valve (51), the first fluid path channel (521), the second liquid on one of fluid path transfer block (52) side
The other end of paths (522) and liquid outlet channel (523) extends respectively on other sides of fluid path transfer block (52) and first
The other end in fluid path channel (521) is connected to the first fluid reservoir (30), the other end in the second fluid path channel (522) is connected to the second liquid storage
Tank (40), liquid outlet channel (523) are connected to peristaltic pump (70) by light-transmission tube (14)；Before executing step B, micro electromagnetic is first controlled
Valve (51) is switched on or off with fixed frequency.
10. peristaltic pump flow rate testing methods as claimed in claim 9, it is characterised in that：It is deposited in first fluid reservoir (30)
Diluted black ink is contained, the deionized water of white is stored in the second fluid reservoir (40)；By following step in the step C
It is rapid to calculate time t：It is black when the front end of black fluid column is by loophole (151) at the first photodetector unit (11) position
Color fluid column can stop the light path of the first photodetector unit (11), and the output signal of the first photodetector unit (11) is by height
Level becomes low level；Black fluid column continues to move to, when the front end of black fluid column passes through the second photodetector unit (12) position
When loophole (151) at place, black fluid column can stop the light path of the second photodetector unit (12), the second Photoelectric Detection list
The output signal of first (12) becomes low level from high level；Processing unit (13) obtains two signal failing edges by timer
Time difference is time t.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810078782.9A CN108458760A (en) | 2018-01-23 | 2018-01-23 | Wriggling pump flow rate detection apparatus and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078782.9A CN108458760A (en) | 2018-01-23 | 2018-01-23 | Wriggling pump flow rate detection apparatus and detection method |
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| CN108458760A true CN108458760A (en) | 2018-08-28 |
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| CN104721909A (en) * | 2015-01-04 | 2015-06-24 | 涂家海 | Air evacuation detecting device for injection pump |
| CN104807513A (en) * | 2013-11-22 | 2015-07-29 | 福禄克电子公司 | Optical flow measuring device and method of operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3970097A (en) * | 1974-09-23 | 1976-07-20 | Contraves Ag | Apparatus for measuring a volume of liquid and method of operating said apparatus |
| CN101403762A (en) * | 2008-11-13 | 2009-04-08 | 镇江奥迪康医疗仪器有限责任公司 | Calibration device and method for peristaltic pump of electrolytic analysis instrument |
| CN201628680U (en) * | 2009-08-21 | 2010-11-10 | 马三剑 | Nickel-ion online automatic monitoring device |
| CN201697681U (en) * | 2010-05-06 | 2011-01-05 | 深圳市绿恩环保技术有限公司 | Light control metering device |
| CN103091262A (en) * | 2011-11-04 | 2013-05-08 | 中国科学院电子学研究所 | Miniaturized optical device for detecting ammonia nitrogen in water and detecting method |
| CN104807513A (en) * | 2013-11-22 | 2015-07-29 | 福禄克电子公司 | Optical flow measuring device and method of operation |
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