CN103630514A - Multifunctional digital display refractometer - Google Patents
Multifunctional digital display refractometer Download PDFInfo
- Publication number
- CN103630514A CN103630514A CN201310542305.0A CN201310542305A CN103630514A CN 103630514 A CN103630514 A CN 103630514A CN 201310542305 A CN201310542305 A CN 201310542305A CN 103630514 A CN103630514 A CN 103630514A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- inverted trapezoidal
- trapezoidal prism
- multifunctional digital
- digital refractometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a multifunctional digital display refractometer, comprising a housing, a circuit board, a built-in power supply, and a light path sensing system, wherein the circuit board is arranged inside the housing; a microcontroller and a display module are arranged on the circuit board; the built-in power supply is arranged inside the housing and is connected with the circuit board; the light path sensing system is arranged inside the housing and comprises a bracket, an inverted trapezoidal prism, a measuring reservoir, a light-emitting diode (LED) lamp, and a complementary metal-oxide-semiconductor transistor (CMOS) photoelectric sensor; the bracket is arranged at one side of the circuit board; the inverted trapezoidal prism is arranged on the bracket; the measuring reservoir is arranged at the top surface of the inverted trapezoidal prism; the LED lamp is arranged at one side of the inverted trapezoidal prism and on the bracket; the CMOS photoelectric sensor is fixed on the bracket and arranged at the other side of the inverted trapezoidal prism and is in communication connection with the microcontroller. The refractometer disclosed by the invention is high in accuracy and low in cost, and the accuracy of the refractive index is 0.00005.
Description
Technical field
The present invention relates to optical instrument fields of measurement, be specifically related to a kind of multifunctional digital refractometer.
Background technology
Refractive index is one of important physical constant of material, and many materials have own exclusive refractive index.When light enters the different medium of another kind of density from a kind of medium, can produce refraction effect, refractive index of liquid n is a function relevant with incident light wave long name with its density p, the variation of temperature T and concentration C all can change the density of solution, be n=n (C, T, γ).For the solution of uniform temperature T, when its lambda1-wavelength γ is unique, between the concentration C of solution and its index of refraction n, exist one-to-one relationship, i.e. C=f
-1(n).Therefore the detection that we can change by the single wavelength light line position to through solution, calculates the variation of corresponding solution concentration.
At present, the instrument of domestic measurement liquid refractivity mainly contains hand-hold refractometer and Abbe refractometer.For example Granted publication number discloses the online digital refractometer of a kind of high precision for the Chinese utility model patent of CN201955301U.Described refractometer comprises refractometer body and control circuit for light source plate, prism, at least two catoptrons, ccd image sensor and signal processing circuit boards is thereon set; On control circuit for light source plate, be fixed with light source, at least two catoptrons are staggered on two relative sidewalls of photometer body along left and right in the short transverse of refractometer body, catoptron is used for directive ccd image sensor the light multiple reflections from prism outgoing, between control circuit for light source plate and signal processing circuit board, be electrically connected to, between signal processing circuit board and ccd image sensor, be electrically connected to.
Application number is that 91231056.1 Chinese invention patent document discloses a kind of automatic aimming Abbe refractometer, (side plane at the right angle on this relative inclined-plane of prism is test surfaces by the autocollimator that adopts slit place that photelectric receiver is set, to test prism with right angle, opposite side plane is the reflecting surface that is coated with reflectance coating), incident angle conversion scanning is done on the inclined-plane of the relative right angle test of the directional light prism that allows autocollimator send, and with simple structure, has realized and has guaranteed the larger test specification under precision.
The accuracy of these apparatus measures liquid refractivities is bigger than normal, is about 0.0003, and needs configuration purpose sem observation, and intelligent degree is low, can not remote reading and straighforward operation.For example Granted publication number discloses a kind of Handheld refractometer eye lens for the Chinese utility model patent of CN202126394U, on hand-hold refractometer, be respectively equipped with refractive power Ling Jing, enter tabula rasa, zero correction screw and rubber sleeve, at the position, rear end of hand-hold refractometer, cover has eyepiece, described eyepiece is annular, and described eyepiece inwall is compact to be connected.
The accuracy of measurement of external automatic refractometer can reach 0.0001 or less, and volume is little, good seal, directly digital display reading, has water-proof function, can be used for online measurement, but can not realize remote control, simultaneously on the high side, a Japanese digital display refractometer, more than at least needing several ten thousand Renminbi.Domestic at present about the research in this field in the starting stage, therefore develop a economical and practical and to meet the multifunctional digital refractometer of national conditions particularly important.
Summary of the invention
The invention provides a kind of multifunctional digital refractometer, accuracy of measurement is high, and accuracy can reach 0.00005, and with low cost.
A multifunctional digital refractometer, comprises shell, also comprises:
Be positioned at the circuit board of shell, microcontroller and display module are installed on this circuit board;
Be positioned at the built-in power of shell, this built-in power is connected with described circuit board;
Be positioned at the light path sensor-based system of shell, this light path sensor-based system comprises:
Be positioned at the support of circuit board one side,
Be located at the inverted trapezoidal prism on described support,
Be located at the measuring flume of described inverted trapezoidal prism end face,
Be arranged on described support and be positioned at the LED lamp of inverted trapezoidal prism one side,
And be fixed on described support and be positioned at the CMOS photoelectric sensor of described inverted trapezoidal prism opposite side, described CMOS photoelectric sensor is connected with micro-controller communications.
Multifunctional digital refractometer of the present invention, sample liquids is positioned at sample cell, the light beam that LED lamp sends enters inverted trapezoidal prism through inverted trapezoidal prism one side, the 1st index of refraction occurs to be changed, arrive inverted trapezoidal prism and sample liquids interface, part light beam enters sample liquids, refractive index occurs the 2nd time and changes, the light beam that enters sample liquids reflects at sample liquids and air interface, get back to inverted trapezoidal prism boundary, enter inverted trapezoidal prism, there is variations in refractive index the 3rd time, this light beam passes inverted trapezoidal prism in the air dielectric of incident light opposite side, the 4th generation variations in refractive index, then be mapped on CMOS photoelectric sensor, different sample liquids media, can produce different refractive indexes, the displacement meeting that light beam finally drops on CMOS photoelectric sensor changes, according to the photosignal of pattern displacement, by microcontroller, process, calculate with the built-in typical curve comparative analysis being integrated on microcontroller, finally the concentration value of the index of refraction of testing sample liquid and other indexs is transported on display module, be stored in storage module simultaneously, can derive for computer data.
In the present invention, used on the one hand the CMOS photoelectric sensor of degree of precision, on the other hand in order better to mate with CMOS photoelectric sensor, improved light path system, light path is by 2 refractions, 1 secondary reflection, displacement point collection after 2 refractions completes measurement again, this light path is by repeatedly reflecting and reflecting combination, the relative displacement that the sample liquids of different refractivity is finally obtained is poor larger with respect to other refractometers, even if fine distinction is also amplified by this light path design, in conjunction with CMOS photoelectric sensor, make the accuracy of instrument of the present invention bring up to 0.00005.
As preferably, described microcontroller is MCU microcontroller, integrated A/D modular converter and data storage module.A/D modular converter can convert signal to digital signal and output to liquid crystal display, and data storage module can store test data.
As preferably, between described inverted trapezoidal prism and photoelectric sensor, be provided with optical filter, and optical filter is narrow band pass filter, wavelength is 589nm, bandwidth 5nm.
As preferably, described LED lamp is that wavelength is the monochromatic yellow light LED lamp of 589nm.
As preferably, between described measuring flume and inverted trapezoidal prism end face, be provided with waterproof sealing gasket.Described waterproof sealing gasket acid-alkali-corrosive-resisting
As preferably, temperature sensor is also installed between described measuring flume and waterproof sealing gasket, temperature sensor is connected with circuit board by wire.Make instrument of the present invention there is temperature compensation function.
Light path system of the present invention, under the combination of above-mentioned further optimum condition, can better mate with CMOS photoelectric sensor, and the two is the collaborative precision that improves instrument of the present invention mutually.Utilize the light path system after CMOS photoelectric sensor and the present invention improve, the data accuracy obtaining is higher 10 times than existing national standard method, current national standard method, adopt Abbe refractometer, eyepiece mode least count is 0.0001, and instrument of the present invention employing digital display mode and minimum reading are 0.00001.
As preferably, bluetooth module is also installed on described circuit board.This bluetooth module is for wireless connections computer, can be by digital data transmission to computer or accept computer CPU instruction, instrument of the present invention can be used for remote reading and Remote.
As preferably, timer is also installed on described circuit board, can recording test time.
As preferably, described inverted trapezoidal prism bottom surface scribbles black coating.
As preferably, described shell is provided with button and the visual windows corresponding with display module, and described display module is LCD MODULE.
Described shell is waterproof case, and the button on shell comprises on & off switch, temperature key, correction/zeroing key, function key, read key and bluetooth key.
For convenience of the volume quantitative of testing liquid, as preferably, described measuring flume inwall is provided with internal standard line.
Compare with existing refractometer, the present invention has following beneficial effect:
Refractometer of the present invention is simple in structure, and light hand-held, weight is 200-300g only, simple to operate, and layman can use.Fast detecting, only needs 2-8s left and right just can measure a sample, is applicable to the fast detecting of field quick detection and utmost point Multi-example.Utilize LED lamp list wavelength light source, energy consumption is low, and the life-span is long, measured signal is stable, instrument accuracy grade is high, and index of refraction accuracy is 0.00005, band temperature compensation function, according to different built-in typical curves, the measurement of concetration of selecting many indexes that can working sample liquid by function key, accuracy, more than 0.1%, comprises pol, freezing point, Brix degree, salinity, alcoholic strength, soymilk concentration, specific gravity of urine, haemocyanin, ethylene glycol, propylene glycol, acid, pesticide concentration etc.The sample data of test can store in machine, can start bluetooth key and export on computer.Full machine integral waterproofing.
All parts of the present invention all can adopt commercially available prod, easy to assembly, with low cost.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional structure schematic diagram of refractometer of the present invention.
Fig. 2 is the horizontal sectional structure schematic diagram of refractometer of the present invention.
Fig. 3 is refractometer shell schematic diagram of the present invention.
Fig. 4 is refractometer measuring principle schematic diagram of the present invention.
In figure, 1, shell, 2, circuit board, 3, microcontroller, 4, display module, 5, built-in power, 6, LED lamp source, 7, inverted trapezoidal prism, 8, optical filter, 9, CMOS photoelectric sensor, 10, light path sensor-based system support, 11, measuring flume, 12, sealing gasket, 13, button, 14, bluetooth module, 15, timer, 16, temperature sensor.
Embodiment
As shown in Figures 1 to 3, a kind of multifunctional digital refractometer, comprises shell 1, is located at circuit board 2, built-in power 5 and light path sensor-based system in shell 1.
Bluetooth module 14 is for wireless connections computer, can be by digital data transmission to computer or accept computer CPU instruction, timer 15 is for recording the reading duration.
Light path sensor-based system comprises: LED lamp 6, inverted trapezoidal prism 7, optical filter 8, CMOS photoelectric sensor 9, support 10, measuring flume 11, temperature sensor 16.
CMOS photoelectric sensor 9, optical filter 8 and be parallel to each other with the side of inverted trapezoidal prism 7, installation for convenience of CMOS photoelectric sensor 9 and optical filter 8, support 10 tops are near a side of circuit board 2 with one section of downward-sloping dip plane, and optical filter 8 and CMOS photoelectric sensor 9 are arranged on this dip plane.
The bottom surface of inverted trapezoidal prism 7 scribbles black coating, end face is connected with the bottom surface of measuring flume 11, between the end face of inverted trapezoidal prism 7 and the bottom surface of measuring flume 11, sealing gasket 12 and temperature sensor 16 are set, measuring flume 11 is made for acid-alkali-corrosive-resisting material, measuring flume inwall is carved with graticule, on shell 1 with the opening corresponding with measuring flume 11.
Communication connection between CMOS photoelectric sensor 9 and microcontroller 3, receives by the photosignal of inverted trapezoidal prism 7, this photosignal is transferred on the A/D modular converter of microcontroller, carries out signal conversion.
For convenience of integrated installation, light path sensor-based system is positioned at the front end of shell 1, circuit board 2 is positioned at the rear end of shell 1, built-in power 5 is located at the below of circuit board 2, display module 4 is positioned at the centre of circuit board 2, each corresponding functional switch is positioned at the tail end place near shell 1, and each corresponding functional switch adopts conventional set-up mode.
Shell 1 adopts waterproof material, on shell 1 with the visual windows corresponding with display module 4 and with circuit board 2 on button 13 corresponding to each functional switch, button 13 comprises on & off switch, temperature key, function key, correction/zeroing key, read key, bluetooth key.
Principle of work of the present invention as shown in Figure 4, testing sample is placed in measuring flume 11, the light beam that LED lamp 6 sends enters inverted trapezoidal prism 7 through prism one side, the 1st index of refraction occurs to be changed, to inverted trapezoidal prism and sample liquids interface, light beam enters sample liquids medium, refractive index occurs the 2nd time and changes, the light beam that enters sample liquids reflects at sample liquids and air interface, get back to inverted trapezoidal prism 7 interfaces, enter inverted trapezoidal prism 7, there is variations in refractive index the 3rd time, this light beam passes inverted trapezoidal prism 7 in air dielectric, the 4th generation variations in refractive index, then be mapped on CMOS photoelectric sensor 9.
Different sample liquids media, can produce different refractive indexes, the displacement meeting that light beam finally drops on CMOS photoelectric sensor 9 changes, according to the photosignal of pattern displacement, by microcontroller, process, calculate with the typical curve comparative analysis being integrated on microcontroller, finally the concentration value of the index of refraction of testing sample liquid and other indexs is transported on display module 4, be stored in storage module simultaneously, can derive for computer data.
Using method of the present invention is as follows:
By on & off switch, switch on power, distilled water is joined in measuring flume until liquid level and inwall graticule are fair.Press temperature key, measure distilled water temperature, simultaneously the automatic open temp compensate function of instrument.Press correction/zeroing key, zeroing is proofreaied and correct; Then will treat that sample measuring liquid joins in measuring flume until liquid level and inwall graticule are fair, by function key choosing, survey the index parameter that needs mensuration, as index of refraction, then press temperature key, liquid crystal display shows sample liquid temp, and the automatic open temp compensate function of while instrument, by read key, liquid crystal display shows the concentration value under current function key selection index parameter, and general unit represents with %.
When varying liquid and not changing index, as long as the 2nd increment liquid is joined in measuring flume until liquid level and inwall graticule are fair, press temperature key, after displays temperature, by read key, can obtain the index concentration value of the 2nd sample liquid.When varying liquid and change index simultaneously, the 2nd increment liquid need to be joined in measuring flume until liquid level and inwall graticule are fair, by function key choosing, survey the index parameter that needs mensuration, then press after temperature key displays temperature, by read key, obtain the different index concentration values of the 2nd sample liquid.Instrument internal storage module can record above data at least 10000 times, and built-in counter is minute corresponding to automatic record data when pressing read key, is beneficial to searching of data.All data can output on computer by bluetooth button is disposable, have saved the trouble of on-the-spot manual record data.
Claims (10)
1. a multifunctional digital refractometer, comprises shell, it is characterized in that, also comprises:
Be positioned at the circuit board of shell, microcontroller and display module are installed on this circuit board;
Be positioned at the built-in power of shell, this built-in power is connected with described circuit board;
Be positioned at the light path sensor-based system of shell, this light path sensor-based system comprises:
Be positioned at the support of circuit board one side,
Be located at the inverted trapezoidal prism on described support,
Be located at the measuring flume of described inverted trapezoidal prism end face,
Be arranged on described support and be positioned at the LED lamp of inverted trapezoidal prism one side,
And be fixed on described support and be positioned at the CMOS photoelectric sensor of described inverted trapezoidal prism opposite side, described CMOS photoelectric sensor is connected with micro-controller communications.
2. multifunctional digital refractometer according to claim 1, is characterized in that, described microcontroller is MCU microcontroller, integrated A/D modular converter and data storage module.
3. multifunctional digital refractometer according to claim 1, is characterized in that, between described inverted trapezoidal prism and CMOS photoelectric sensor, is provided with optical filter, and optical filter is narrow band pass filter, and wavelength is 589nm, bandwidth 5nm.
4. multifunctional digital refractometer according to claim 1, is characterized in that, described LED lamp is that wavelength is the monochromatic yellow light LED lamp of 589nm.
5. multifunctional digital refractometer according to claim 1, is characterized in that, between described measuring flume and inverted trapezoidal prism end face, is provided with waterproof sealing gasket.
6. multifunctional digital refractometer according to claim 1, is characterized in that, temperature sensor is also installed between described measuring flume and waterproof sealing gasket, and temperature sensor is connected with circuit board by wire.
7. multifunctional digital refractometer according to claim 1, is characterized in that, bluetooth module is also installed on described circuit board.
8. multifunctional digital refractometer according to claim 1, is characterized in that, timer is also installed on described circuit board.
9. multifunctional digital refractometer according to claim 1, is characterized in that, described inverted trapezoidal prism bottom surface scribbles black coating.
10. multifunctional digital refractometer according to claim 1, is characterized in that, described shell is provided with button and the visual windows corresponding with display module, and described display module is LCD MODULE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310542305.0A CN103630514B (en) | 2013-11-05 | 2013-11-05 | A kind of Multifunctional digital display refractometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310542305.0A CN103630514B (en) | 2013-11-05 | 2013-11-05 | A kind of Multifunctional digital display refractometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103630514A true CN103630514A (en) | 2014-03-12 |
| CN103630514B CN103630514B (en) | 2016-09-07 |
Family
ID=50211789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310542305.0A Active CN103630514B (en) | 2013-11-05 | 2013-11-05 | A kind of Multifunctional digital display refractometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103630514B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764743A (en) * | 2015-03-23 | 2015-07-08 | 钦州华成自控设备有限公司 | A brix detector, a brix on-line detection system and a using method |
| CN105044028A (en) * | 2015-06-01 | 2015-11-11 | 西安工程大学 | Universal online industrial refractometer used for detecting solution concentration and detection method thereof |
| CN105911024A (en) * | 2016-04-14 | 2016-08-31 | 梧州市产品质量检验所 | Determination method of rosin refractive index |
| CN107607377A (en) * | 2017-09-20 | 2018-01-19 | 宁波市鄞州赛弗兑食品科技有限公司 | A kind of fruit juice device for making for refractometer |
| CN107957407A (en) * | 2017-11-22 | 2018-04-24 | 盘锦雨源新创意开发推广有限公司 | A kind of sonde-type digital display refractometer |
| CN110441263A (en) * | 2019-09-04 | 2019-11-12 | 温州一鼎仪器制造有限公司 | Refractometer |
| CN110665205A (en) * | 2019-05-07 | 2020-01-10 | 宜春学院 | Novel sports teaching sport timer |
| CN110865031A (en) * | 2019-10-30 | 2020-03-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Corrosive liquid parameter measuring device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122911A (en) * | 1994-11-11 | 1996-05-22 | 潘志文 | Liquid concentration on-line measuring apparatus |
| CN1499190A (en) * | 2002-10-30 | 2004-05-26 | ��ʽ���簮������� | Refractometer |
| US20100085560A1 (en) * | 2008-10-08 | 2010-04-08 | George Howell Coffee Company, Llc | Coffee Refractometer Method And Apparatus |
| CN201926616U (en) * | 2010-11-19 | 2011-08-10 | 华中科技大学 | Liquid multi-parameter sensor |
| JP2012026912A (en) * | 2010-07-26 | 2012-02-09 | Atago:Kk | Salinity concentration measuring instrument and salinity concentration measuring method |
| CN202974864U (en) * | 2012-11-11 | 2013-06-05 | 华中科技大学 | Measuring instrument for measuring refractive index of liquid-phase gas |
| JP2013167477A (en) * | 2012-02-14 | 2013-08-29 | Sigma Koki Kk | Method and device for measuring refractive index |
| CN203658258U (en) * | 2013-11-05 | 2014-06-18 | 杭州陆恒生物科技有限公司 | Multifunctional digital display refractometer |
-
2013
- 2013-11-05 CN CN201310542305.0A patent/CN103630514B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122911A (en) * | 1994-11-11 | 1996-05-22 | 潘志文 | Liquid concentration on-line measuring apparatus |
| CN1499190A (en) * | 2002-10-30 | 2004-05-26 | ��ʽ���簮������� | Refractometer |
| US20100085560A1 (en) * | 2008-10-08 | 2010-04-08 | George Howell Coffee Company, Llc | Coffee Refractometer Method And Apparatus |
| JP2012026912A (en) * | 2010-07-26 | 2012-02-09 | Atago:Kk | Salinity concentration measuring instrument and salinity concentration measuring method |
| CN201926616U (en) * | 2010-11-19 | 2011-08-10 | 华中科技大学 | Liquid multi-parameter sensor |
| JP2013167477A (en) * | 2012-02-14 | 2013-08-29 | Sigma Koki Kk | Method and device for measuring refractive index |
| CN202974864U (en) * | 2012-11-11 | 2013-06-05 | 华中科技大学 | Measuring instrument for measuring refractive index of liquid-phase gas |
| CN203658258U (en) * | 2013-11-05 | 2014-06-18 | 杭州陆恒生物科技有限公司 | Multifunctional digital display refractometer |
Non-Patent Citations (2)
| Title |
|---|
| 刘铁根: "《嵌入式图像检测技术》", 31 March 2008, 机械工业出版社 * |
| 邹天汉: "《轻松学数码相机使用与拍摄技巧》", 30 June 2009, 机械工业出版社 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764743A (en) * | 2015-03-23 | 2015-07-08 | 钦州华成自控设备有限公司 | A brix detector, a brix on-line detection system and a using method |
| CN104764743B (en) * | 2015-03-23 | 2018-01-19 | 钦州华成自控设备有限公司 | Brix detector, brix on-line detecting system and application method |
| CN105044028A (en) * | 2015-06-01 | 2015-11-11 | 西安工程大学 | Universal online industrial refractometer used for detecting solution concentration and detection method thereof |
| CN105044028B (en) * | 2015-06-01 | 2017-12-19 | 西安工程大学 | For detecting the universal on-line industry refractometer and detection method of solution concentration |
| CN105911024A (en) * | 2016-04-14 | 2016-08-31 | 梧州市产品质量检验所 | Determination method of rosin refractive index |
| CN107607377A (en) * | 2017-09-20 | 2018-01-19 | 宁波市鄞州赛弗兑食品科技有限公司 | A kind of fruit juice device for making for refractometer |
| CN107607377B (en) * | 2017-09-20 | 2021-01-05 | 宁波市鄞州赛弗兑食品科技有限公司 | Fruit juice preparation device for refractometer |
| CN107957407A (en) * | 2017-11-22 | 2018-04-24 | 盘锦雨源新创意开发推广有限公司 | A kind of sonde-type digital display refractometer |
| CN107957407B (en) * | 2017-11-22 | 2023-12-26 | 盘锦雨源新创意开发推广有限公司 | Probe type digital display refractometer |
| CN110665205A (en) * | 2019-05-07 | 2020-01-10 | 宜春学院 | Novel sports teaching sport timer |
| CN110441263A (en) * | 2019-09-04 | 2019-11-12 | 温州一鼎仪器制造有限公司 | Refractometer |
| CN110865031A (en) * | 2019-10-30 | 2020-03-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Corrosive liquid parameter measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103630514B (en) | 2016-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103630514A (en) | Multifunctional digital display refractometer | |
| CN104596990B (en) | Double channel optical fiber turbidimetry method and sensor | |
| CN104568946A (en) | Intelligent optical fiber pH sensor | |
| CN104374743A (en) | Turbidity sensor and turbidity measurement device | |
| CN204203101U (en) | A kind of dissolved oxygen DO pick-up unit based on fluorescence analysis and system | |
| CN102967583A (en) | Measuring apparatus and method used for measuring liquid phase gas refraction index | |
| CN104155247B (en) | Water body chlorophyll and turbidity in-situ determination method and determinator | |
| CN204188525U (en) | Turbidity transducer and turbidity meter | |
| CN102175627B (en) | Multi-wavelength multi-light-source diffuse reflection type colorimetric device and reflectivity measuring method | |
| CN203658258U (en) | Multifunctional digital display refractometer | |
| CN202794024U (en) | Sample cell used for measuring molecular spectral absorption | |
| CN201788147U (en) | Optical-fiber probe type soil nutrient tester | |
| CN203643333U (en) | Turbidity meter | |
| CN208505896U (en) | Retro-reflecting coefficient tester | |
| CN203688071U (en) | Fiber digital portable color photometer | |
| CN204302181U (en) | A kind of water salinity checkout gear | |
| CN202974864U (en) | Measuring instrument for measuring refractive index of liquid-phase gas | |
| CN206515232U (en) | Water quality detected instrument | |
| CN213337292U (en) | Portable turbidimeter | |
| CN209280566U (en) | A kind of dry air formaldehyde in-situs tester | |
| CN204882371U (en) | Digital photoelectricity biosensor | |
| CN204028001U (en) | For measuring the optical system of refractive index and a kind of small-sized apparatus for measuring refractive index | |
| CN203534965U (en) | Refractive index measuring device with large measuring range | |
| CN112255154A (en) | Portable silt concentration measuring method and device based on optical principle | |
| CN106872416B (en) | Immersion type receiving-transmitting integrated all-fiber structure liquid turbidity detection device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310017 No. 34, wubaojiu District, Pengbu Town, Jianggan District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Luheng Environmental Technology Co.,Ltd. Patentee after: Zhejiang University Address before: 310017 No. 34, wubaojiu District, Pengbu Town, Jianggan District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU LOHAND BIOLOGICAL Co.,Ltd. Patentee before: Zhejiang University |
|
| CP01 | Change in the name or title of a patent holder |