CN2528005Y - Double scattered light turbimeter - Google Patents
Double scattered light turbimeter Download PDFInfo
- Publication number
- CN2528005Y CN2528005Y CN 01253067 CN01253067U CN2528005Y CN 2528005 Y CN2528005 Y CN 2528005Y CN 01253067 CN01253067 CN 01253067 CN 01253067 U CN01253067 U CN 01253067U CN 2528005 Y CN2528005 Y CN 2528005Y
- Authority
- CN
- China
- Prior art keywords
- scattered light
- photoelectric cell
- light
- turbidity
- sample groove
- 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.)
- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 abstract 2
- 239000000725 suspension Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004879 turbidimetry Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a double scattering-light turbiditor belonging to an instrument for measuring liquid turbidity, a comparative photoelectric tank is added in the specimen slot room of the general scattering-light turbiditor, the comparative photoelectric tank and the prior photoelectric tank simultaneously receive the scattering-light signal generated by liquid turbidity and then perform differential output, so that interference electric noises in the signal are counteracted, thereby measuring the turbidity of the to-be-measured liquid accurately.
Description
A kind of enviromental protection instrument that utilizes two scattered light drive test quantity of fluid turbidity.
The principle that how much is directly proportional with its scattered light according to what of outstanding absurd creature in the liquid.Utilize a photoelectric cell that the light of suspension scattering is carried out opto-electronic conversion, measure the size of current after the photoelectric cell opto-electronic conversion, obtain suspended particle in the suspension, thereby draw the turbidity value of this suspension what of amount of light scatter.But when measuring liquid turbidity with said method and since the electric signal that the turbidity in the liquid produces a little less than.The photoelectric cell variation of temperature, the electrical noise signal that the fluctuation of voltage produces in the circuit is stronger, the current signal that seriously disturbs the outstanding absurd creature scattered light of particle to obtain after the photoelectric cell conversion.Make the turbidity value error of measuring big, poor repeatability, sensitivity is low, and this problem does not solve both at home and abroad so far as yet fully.
Provide a kind of doubly scattered light turbidimeter order of the present utility model.It can be offset in the turbidimetry by the photoelectric cell temperature variation with two photoelectric cell work, and the electrical noise signal that the circuit voltage fluctuation produces can be applicable to the place that various need are accurately measured liquid turbidity.
The purpose of this utility model is to realize like this.There are two logical light quantities different but can accept the photoelectric cell of measured liquid sample scattered light simultaneously in the turbidimeter sample groove chamber.When surveying zero degree water, adding an electric current, to make the difference between current that produces behind the logical light of two photoelectric cells be zero.Two photoelectric cell working environments are identical.The temperature variation noise signal that fluctuation produces with circuit voltage is the same, cancels each other.Because luminous flux is different, the particle scattered light is how much different in the photoelectric cell reception measured liquid sample when the suspending liquid of measuring tape turbidity, and the photocurrent that the conversion back produces varies in size.Because the electric current that other adds is not subjected to illumination effect, can not change, be a constant.Therefore two different electric currents subtract each other by connecting photronic differential circuit, and the difference that obtains is exactly the photoelectricity flow valuve that photoelectric cell luminous flux difference produces particle scattered light in the suspending liquid.By amplifying back output, draw the turbidity value of this suspending liquid.
Owing to adopt two photoelectric cells that working environment is the same.Temperature variation, the electrical noise that voltage fluctuation produces in the circuit is identical, is suppressed to offset by differential circuit.Therefore can accurately draw the turbidity value of tested suspension.
Below in conjunction with accompanying drawing, embodiment the utility model is further specified
Figure one doubly scattered light turbidimeter external form figure
Figure two doubly scattered light turbidimeter structural representations
Figure three doubly scattered light turbidimeter electrical schematic diagrams
Among the figure 1, body 2, sample groove chamber 3, photoelectric cell 4, photoelectric cell 5, sample groove 6, circuit 7, gauge outfit 8, contact-making switch 9, school zero current potentiometer 10, reference current potentiometer 11, illuminator 12, lens.
The photoelectric cell of doubly scattered light turbidimeter (3) and (4) are contained in the both sides of sample groove chamber (2) respectively.Receive the scattered light of tested suspension in the sample groove (5).Wherein the light receiving window of photoelectric cell (3) is less than photoelectric cell (4).First calibration operation point before the work.Method is with sample groove (5) the zero degree reference water of packing into, put into sample groove chamber (2) at this moment the electric current that produces of photoelectric cell (4) be I2.The electric current that photoelectric cell (3) produces is I1, and light receiving window varies in size, I1 ≠ I2.Adjust reference current potentiometer (10) and make its output current I4+I2=I1, the working point calibration is promptly finished.Consider air to scattering of light rate ≠ zero degree water to the scattering of light rate, in sample groove chamber (2), load onto contact-making switch (8), control its closure by sample groove (5).Sample groove (5) takes out back contact-making switch (8) closure, and high-ranking officers' zero potential device (9) is connected circuit, provides electric current I 3 to compensate.Rotation school zero potential device (9) makes electric current I 4+I2=I3+I1, is zero behind differential the subtracting each other in circuit (6), and gauge outfit (7) does not have indication.After the school benchmark finished, after the sample groove (5) that suspension is housed was put into sample groove (12), contact-making switch (8) disconnected, and school zero potential device (9) disconnects simultaneously with circuit.The light of illuminator (11) is scattered to photoelectric cell (3) by the suspended particle in the interior suspension of sample groove (5), and on (4), the logical light quantity of photoelectric cell (4) is greater than photoelectric cell, (3), so the electric current I 1 that produces greater than photoelectric cell (3) of the electric current I 2 that produces of photoelectric cell (4).Because it is a constant that reference current potentiometer (10) provides the electric current I 4 of photoelectric cell (4).This moment, electric current I 2+I4 was greater than I1.It is non-vanishing to subtract each other the back difference in circuit, is amplified to output, and the gauge outfit (7) that makes connecting circuit (6) output terminal is indicated the turbidity value of this suspending liquid by electric current.The utility model is less demanding to circuit (6).General general dc operational amplifier gets final product.
Existing scattered light turbidimeter is owing to temperature variation both at home and abroad, and voltage fluctuation is disturbed, and error is big, poor repeatability.The doubly scattered light turbidimeter has overcome this shortcoming, can accurately reflect the turbidity of fluid to be measured.
Claims (1)
1, the doubly scattered light turbidimeter is a kind of instrument of measuring liquid turbidity, by body (1) sample groove chamber (2) photoelectric cell (3), (4) sample groove (5), circuit (6), contact-making switch (8), illuminator compositions such as (9), it is characterized in that the interior photoelectric cell in sample groove chamber (2) (3) (4) window size difference, connecting circuit (6) is with the differential output of scattered light signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253067 CN2528005Y (en) | 2001-08-14 | 2001-08-14 | Double scattered light turbimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253067 CN2528005Y (en) | 2001-08-14 | 2001-08-14 | Double scattered light turbimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2528005Y true CN2528005Y (en) | 2002-12-25 |
Family
ID=33662634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01253067 Expired - Fee Related CN2528005Y (en) | 2001-08-14 | 2001-08-14 | Double scattered light turbimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2528005Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590146A (en) * | 2010-12-28 | 2012-07-18 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Method for determining a measured variable of a medium, especially for turbidity measurement |
-
2001
- 2001-08-14 CN CN 01253067 patent/CN2528005Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590146A (en) * | 2010-12-28 | 2012-07-18 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Method for determining a measured variable of a medium, especially for turbidity measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |