CN2551992Y - Brine concentration measurer - Google Patents
Brine concentration measurer Download PDFInfo
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- CN2551992Y CN2551992Y CN 02240516 CN02240516U CN2551992Y CN 2551992 Y CN2551992 Y CN 2551992Y CN 02240516 CN02240516 CN 02240516 CN 02240516 U CN02240516 U CN 02240516U CN 2551992 Y CN2551992 Y CN 2551992Y
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Abstract
The utility model relates to a brine concentration measurer which is mainly composed of a helium-neon (He Ne) laser source, a referential water tank, a measuring water tank, a right angle reflection prism, an inclined optical transmission window, a convergent lens, a narrow band light filtering sheet, a photoelectric position sensing device (PSD), a data processing circuit, a computer signal processing and displaying unit. The device measures the salinity by the offset of an incident ray caused by measuring the refractive difference of the distilled water and the brine with certain concentration, and avoids the problem that the measurement of the salinity is influenced by temperature drift. Simultaneously, the utility model uses a differential measurement method of a PSD two-way output to reduce the influence of the factors of light source fluctuation, medium absorption, light scattering, etc. on the intensity of signal light. The utility model adopts a light filtering sheet to filter environmental irregular scattering light to reduce the influence of fluctuation of the environmental irregular scattering light. The device has strong practicability and low cost. The resolution of the measurement of the salinity can reach 0.002%. The utility model can be used for the field of the measurement of the concentration of liquid, chemical assay and others in the fields of seas, petroleum, chemical industry, etc.
Description
Technical field
The utility model relates to a kind of measurement mechanism of liquid salinity, relates in particular to a kind of brine concentration measurement mechanism that detects principle based on differential refractive index.
Technical background
In scientific research and industrial and agricultural production process, often need monitor the concentration of salt solusion, in the stable operation process such as the solar pond device, the salinity gradient in the pond must keep relative stability, in case salinity gradient changes in the pond, just need in time adjust.Salinity is an important parameter of seawater, and it is monitored accurately, will have important practical value for marine environmental monitoring, sea-farming, seasonal climate prediction etc.Freighter Weight by Draft field in the foreign trade of harbour, the measurement of port, harbour water-mass density also has very important application prospect for the economic loss that improves cargo survey precision, minimizing country.
The measuring method of some brine concentrations was proposed at present, both at home and abroad.As (the Jin Yuanyue of Xi'an Communications University, Chen Zhongqi, Wang Qijie. measure the laser fiber technology of solar pond salinity. solar energy journal .1994, Vol.15, No.2:198-200) utilize the multimode plastic optical fiber of a simple U type to pop one's head in, based on the different principle of the propagation characteristic of light in the different refractivity medium, measure the brine density of solar pond.System architecture is simple, volume is little, realize online automatic measurement and signal transmission at a distance easily, but, form sediment easily and directly influence measuring reliability at the interface of optical fiber and testing liquid because exposed fiber core directly contacts fluid to be measured.The applicant had once proposed the patented claim of " a kind of seawater salinity and temperature be online test method and device simultaneously ", and (application number: 02117422.9), its structure comprises that centre wavelength is that the led light source of 880nm, the incident optical that has GRIN Lens, vertical measuring unit (comprising the slanted glass plate of measuring tank, the reference tank that fills distilled water, 30 °～60 ° of placements, temperature-sensitive reflector element etc.), the array with filtering net film receive optical fiber and CCD photoelectricity testing part etc.; Its principal feature is by Optical Fiber Transmission emission and the light signal that receives, detects principle and semiconductor optical principle of absorption based on differential refractive index, simultaneously can obtain seawater salinity and temperature information by CCD to the separation detection of signal, be characterized in being suitable for the on-the-spot remote real time on-line monitoring in ocean, owing to adopted devices such as array fibre and high precision CCD, made its cost than higher.
The utility model content
The object of the present invention is to provide a kind of measurement mechanism of brine concentration, make its not only have cost low, measure characteristics such as sensitivity height, and easy to use, visuality is good, antijamming capability is strong, be convenient in the laboratory, use.
The technical solution of the utility model is as follows:
A kind of measurement mechanism of brine concentration, mainly comprise illuminating source, measuring unit, data processing circuit, Computer signal processing and display unit and the power supply of powering to system, described measuring unit is mainly by measuring tank, fill the reference tank of distilled water, the optical transmission window that tilts, being contained in the right-angle reflecting prism of measuring in the tank forms, it is characterized in that: in the light path of right-angle reflecting prism reflection, be provided with convergent lens successively, photodetector, before the photosurface of photodetector, be packaged with narrow band pass filter, the output terminal of its photodetector links to each other by the input end that two-way I/V conversion and A/D two-way are gathered transition card simultaneously respectively, and the output terminal of A/D capture card links to each other with the computing machine that contains the software processes program.
It is the helium-neon laser of 633nm that illuminating source described in the utility model is selected centre wavelength for use.Described photodetector adopts linear array optoelectronic position sensing detector.
Described measuring unit adopt with reference to tank preceding, measure tank after horizontal type structure.Described right-angle reflecting prism and photodetector are contained on the five times regualting frame respectively.
The utility model proposes a kind of based on the double differential method, utilize the refractive index difference of variable concentrations salt solution to cause the skew of light, realize the brine concentration measurement mechanism that facula position is measured by PSD, this device has following advantage:
(1) utilize light in the light path to replace optical fiber as signal transmission passage, make its cost low, be adapted under the laboratory condition brine concentration being measured;
(2) the variate method of utilizing the PSD two-way to export has reduced plain influence to signal light intensity such as light source fluctuation, medium absorption, scattering; Antijamming capability is strong, measurement stability good, practical;
(3) easy to use, simple in structure, experiment test is visual good;
(4) measure Measurement Resolution highly sensitive, brine concentration and can reach 0.02 ‰.
Description of drawings
Fig. 1 is the structural principle synoptic diagram of the utility model embodiment.
Fig. 2 is the fundamental diagram of the photoelectric position sensor spare (PSD) in the utility model enforcement.
Fig. 3 is PSD output pre-process circuit and a data acquisition system (DAS) block diagram among the utility model embodiment.
Fig. 4 is the system data capture card calibration measurement data among the utility model embodiment.
Fig. 5 is the error of fitting of data collecting card least square fitting calibration curve among the utility model embodiment.
Fig. 6 is the calibration curve of the brine concentration measurement characteristics of the utility model embodiment.
Fig. 7 is the utility model embodiment data processing software program flow diagram.
Embodiment
Further specify structure of the present utility model, the course of work, measuring principle and embodiment below in conjunction with accompanying drawing:
Fig. 1 is the one-piece construction and the measuring principle synoptic diagram of device.This device mainly comprises He-Ne Lasers light source 1, by measure tank 4, fill distilled water reference tank 5, the optical transmission window 2 that tilts, be contained in and measure the measuring unit that the right-angle reflecting prism 3 in the tank is formed, convergent lens 7, photodetector 9, data processing circuit 11, Computer signal processing and display unit 12 and the power supply of powering to system.Before the photosurface of photodetector, be packaged with narrow band pass filter 8, the output terminal of its photodetector links to each other by the input end that two-way I/V conversion and A/D two-way are gathered transition card simultaneously respectively, and the output terminal of A/D capture card links to each other with the computing machine that contains the software processes program.Photodetector 9 adopts photoelectric position sensor spare (PSD).
During system works, opening power at first, start computing machine, measuring unit is gone in the ruddiness along continuous straight runs direct projection that He-Ne Lasers light source 1 sends, at first through the reference tank 5 of distilled water is housed, enter measurement tank 4 through tilted-putted optical transmission window 2 backs with certain refraction angle, because two kinds of liquid refractive index differences, therefore the ray refraction skew can take place at inclination optical surface place in light, again through right-angle prism 3 reflections, right-angle prism is fixed on can five on the adjusting bracket 6 regulated of dimension, the position of accommodation reflex prism and angle, emergent light is just reached on the center of photoelectric position sensor spare 9, detect light skew (facula position on the receiver photosurface changes) signal that is loaded with salinity information by photoelectric position sensor spare (PSD) at last, carry out pre-service by the signal after 11 pairs of opto-electronic conversion of signal processing circuit module again, handle and display unit 12 and final processing of software program realization data and demonstration by Computer signal.Measuring unit mainly can be divided into two parts, and a part is the tank that is equipped with respectively with reference to distilled water and salt solution to be measured, and distilled water is encapsulated in the organic glass of the optical transmission window with 45 ° of inclinations with reference in the tank 5, and salt solution to be measured is contained in to be measured in the tank 4; Another part is a right-angle reflecting prism 3, is used to change optical path direction.During measurement, need accurately to regulate the five times regualting frame 10 that PSD is housed, make its photosurface vertical, and the offset direction of light is changed along the long axis direction that is parallel to PSD with incident ray.
The measurement of brine concentration is based on the variation of measuring the light refraction angle that almost is directly proportional with salinity and causes that facula position on the detector photosurface changes and realize.And have the fast linear array PSD (GD3191Z) of high resolving power, response speed as the Sensitive Apparatus impression because the refraction angle changes the side-play amount that causes light, and its position resolution is 0.5 μ m, spectral response range is 350～1100nm.Before actual measurement, the measurement characteristics of system is demarcated by the salt solution of normal concentration preparation with sodium chloride (chemical pure) and distilled water, then nominal data is deposited in the computing machine; During actual measurement, computing machine is that the facula position relevant with salinity that record changes pairing salinity value and be presented on the computer screen by the method for tabling look-up with PSD.Fig. 2 has provided the measuring principle of PSD to light spot position signal, PSD is made up of P layer, I layer, N layer three-decker, at the two ends of P layer an output electrode 21 and 22 are arranged respectively, there is a common electrode 23 at place, base at the N layer, provide a bias voltage VR by common electrode to PSD, when light 20 is radiated on certain position of P layer, just have photogenerated current I0 produces at the two poles of the earth of PSD, behind its two-way output current signal I1 and I2 the circuit and data acquisition system (DAS) processing, carry out calculation process by computer software by Fig. 3.
Fig. 4 has provided the calibration experiments test curve of system data capture card, calibration is by giving A/D acquisition system input normal voltage from small to large, gather normal voltage, calibration by capture card, can avoid the non-linear of capture card and of the influence of output voltage at zero point measuring.
Fig. 5 has provided the deviation between capture card measurement data and the least square fitting curve.Fig. 6 is the calibration curve of device for the brine concentration measurement characteristics.From these curves, we as can be seen, the data acquisition error of device is within 0.03%, the sensitivity that brine concentration is measured can reach the every variation 1 ‰ of salinity, PSD has the output of 25 μ m, and the PSD position resolution is 0.5 μ m, and the resolution that can estimate the brine concentration measurement can reach 0.02 ‰.
Fig. 7 is the data processing software process flow diagram, after measuring beginning, at first to gathering through the two paths of signals after the I/V conversion by PSD output, each measurement point is gathered 30 data, utilize " algorithm of rejecting gross error " that measurement data is handled then, reject because the data that accidental error causes with gross error, then remaining data are averaged as measured value, the two paths of signals of the above-mentioned processing of process is through difference and compare computing, just can obtain being varied to the light offset value of direct ratio with salinity, what take here is the mode of acquisition process of going the same way, to eliminate the measuring error that some common mode factors cause; Method by tabling look-up is utilized and is realized that demarcation light side-play amount well---salinity concerns, just can show measurement result on computer screen then.
Claims (5)
1. brine concentration measurement mechanism, mainly comprise illuminating source, measuring unit, data processing circuit, Computer signal processing and display unit and the power supply of powering to system, described measuring unit is mainly by measuring tank, fill the reference tank of distilled water, the optical transmission window that tilts, being contained in the right-angle reflecting prism of measuring in the tank forms, it is characterized in that: in the light path of right-angle reflecting prism reflection, be provided with convergent lens successively, photodetector, before the photosurface of photodetector, be packaged with narrow band pass filter, the output terminal of its photodetector links to each other by the input end that two-way I/V conversion and A/D two-way are gathered transition card simultaneously respectively, and the output terminal of A/D capture card links to each other with the computing machine that contains the software processes program.
2. according to the described brine concentration measurement mechanism of claim 1, it is characterized in that: it is the helium-neon laser of 633nm that described illuminating source is selected centre wavelength for use.
3. according to claim 1 or 2 described brine concentration measurement mechanisms, it is characterized in that: described photodetector adopts linear array optoelectronic position sensing detector.
4. according to the described measurement mechanism of claim 3, it is characterized in that: described measuring unit adopt with reference to tank preceding, measure tank after horizontal type structure.
5. according to the described brine concentration measurement mechanism of claim 1, it is characterized in that: described right-angle reflecting prism and photodetector are contained on the five times regualting frame respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02240516 CN2551992Y (en) | 2002-06-14 | 2002-06-14 | Brine concentration measurer |
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| CN 02240516 CN2551992Y (en) | 2002-06-14 | 2002-06-14 | Brine concentration measurer |
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| CN2551992Y true CN2551992Y (en) | 2003-05-21 |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128810A (en) * | 2010-12-24 | 2011-07-20 | 山东省科学院海洋仪器仪表研究所 | Seawater salinity detection device with prism model capable of refracting for multiple times |
| CN102507506A (en) * | 2011-11-18 | 2012-06-20 | 江苏大学 | Method and device utilizing laser for on-line detecting concentration of mixed chemicals |
| CN101699262B (en) * | 2009-10-23 | 2012-07-04 | 武汉理工大学 | Mica pulp concentration tester |
| CN103063594A (en) * | 2013-01-08 | 2013-04-24 | 四川大学 | Method for automatically determining salinity in seawater |
| CN104931457A (en) * | 2015-05-21 | 2015-09-23 | 中国科学院武汉岩土力学研究所 | Concentration field monitoring device for salt rock indoor water-soluble cavity construction test |
| CN104464480B (en) * | 2014-11-17 | 2016-09-07 | 河南理工大学 | A kind of experimental technique of analog solar heating salt gradient solar pond |
| CN106940297A (en) * | 2017-03-27 | 2017-07-11 | 江苏农牧科技职业学院 | Mixed concentration on-line measurement device |
| CN107014775A (en) * | 2017-03-02 | 2017-08-04 | 珠江水利委员会珠江水利科学研究院 | Based on optical water body concentration field measurement method |
| CN107091820A (en) * | 2017-06-27 | 2017-08-25 | 成都上甲光电科技有限公司 | Laser scattering type water turbidity measuring instrument |
| CN107205583A (en) * | 2015-01-28 | 2017-09-26 | 三星电子株式会社 | Cooking apparatus and its control method |
| CN108507979A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of brine, syrup concentration assay method based on Intelligent water cup for kitchen use |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
| CN108613948A (en) * | 2018-05-24 | 2018-10-02 | 中国人民解放军91663部队 | A method of measuring water-ethylene glycol nonflame hydraulic fluid moisture |
| CN109490138A (en) * | 2018-09-26 | 2019-03-19 | 江西理工大学 | A kind of salt-bath scaled model experimental system and measurement method |
| WO2020098230A1 (en) * | 2018-11-15 | 2020-05-22 | 微山宏瑞电力科技有限公司 | Culinary salinity detection apparatus and manufacturing method therefor |
| CN111744066A (en) * | 2020-07-25 | 2020-10-09 | 昆明医科大学第一附属医院 | Anticoagulant hollow fiber membrane and filter |
| CN112964658A (en) * | 2021-04-13 | 2021-06-15 | 彦旭科技(武汉)有限公司 | Liquid concentration measuring method and device based on illumination attenuation |
| US11064570B2 (en) | 2015-01-28 | 2021-07-13 | Samsung Electronics Co., Ltd. | Cooking appliance and method for controlling the same |
-
2002
- 2002-06-14 CN CN 02240516 patent/CN2551992Y/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699262B (en) * | 2009-10-23 | 2012-07-04 | 武汉理工大学 | Mica pulp concentration tester |
| CN102128810B (en) * | 2010-12-24 | 2012-05-30 | 山东省科学院海洋仪器仪表研究所 | Seawater salinity detection device with prism model capable of refracting for multiple times |
| CN102128810A (en) * | 2010-12-24 | 2011-07-20 | 山东省科学院海洋仪器仪表研究所 | Seawater salinity detection device with prism model capable of refracting for multiple times |
| CN102507506A (en) * | 2011-11-18 | 2012-06-20 | 江苏大学 | Method and device utilizing laser for on-line detecting concentration of mixed chemicals |
| CN103063594A (en) * | 2013-01-08 | 2013-04-24 | 四川大学 | Method for automatically determining salinity in seawater |
| CN104464480B (en) * | 2014-11-17 | 2016-09-07 | 河南理工大学 | A kind of experimental technique of analog solar heating salt gradient solar pond |
| CN107205583A (en) * | 2015-01-28 | 2017-09-26 | 三星电子株式会社 | Cooking apparatus and its control method |
| US11064570B2 (en) | 2015-01-28 | 2021-07-13 | Samsung Electronics Co., Ltd. | Cooking appliance and method for controlling the same |
| CN104931457A (en) * | 2015-05-21 | 2015-09-23 | 中国科学院武汉岩土力学研究所 | Concentration field monitoring device for salt rock indoor water-soluble cavity construction test |
| CN107014775B (en) * | 2017-03-02 | 2019-09-24 | 珠江水利委员会珠江水利科学研究院 | Based on optical water body concentration field measurement method |
| CN107014775A (en) * | 2017-03-02 | 2017-08-04 | 珠江水利委员会珠江水利科学研究院 | Based on optical water body concentration field measurement method |
| CN106940297A (en) * | 2017-03-27 | 2017-07-11 | 江苏农牧科技职业学院 | Mixed concentration on-line measurement device |
| CN107091820A (en) * | 2017-06-27 | 2017-08-25 | 成都上甲光电科技有限公司 | Laser scattering type water turbidity measuring instrument |
| CN108613948A (en) * | 2018-05-24 | 2018-10-02 | 中国人民解放军91663部队 | A method of measuring water-ethylene glycol nonflame hydraulic fluid moisture |
| CN108593599A (en) * | 2018-05-29 | 2018-09-28 | 莆田市烛火信息技术有限公司 | A kind of brine for kitchen use, syrup concentration measure Intelligent water cup |
| CN108507979B (en) * | 2018-05-29 | 2020-11-24 | 义乌兰思体育用品有限公司 | Method for measuring concentration of saline water and sugar water based on intelligent water cup for kitchen |
| CN108507979A (en) * | 2018-05-29 | 2018-09-07 | 莆田市烛火信息技术有限公司 | A kind of brine, syrup concentration assay method based on Intelligent water cup for kitchen use |
| CN109490138A (en) * | 2018-09-26 | 2019-03-19 | 江西理工大学 | A kind of salt-bath scaled model experimental system and measurement method |
| CN109490138B (en) * | 2018-09-26 | 2020-12-08 | 江西理工大学 | Brine model experiment system and measurement method |
| WO2020098230A1 (en) * | 2018-11-15 | 2020-05-22 | 微山宏瑞电力科技有限公司 | Culinary salinity detection apparatus and manufacturing method therefor |
| CN111744066A (en) * | 2020-07-25 | 2020-10-09 | 昆明医科大学第一附属医院 | Anticoagulant hollow fiber membrane and filter |
| CN112964658A (en) * | 2021-04-13 | 2021-06-15 | 彦旭科技(武汉)有限公司 | Liquid concentration measuring method and device based on illumination attenuation |
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