CN107340250A - Double light-metering light path COD on-line analysis measuring instruments - Google Patents
Double light-metering light path COD on-line analysis measuring instruments Download PDFInfo
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- CN107340250A CN107340250A CN201710653819.1A CN201710653819A CN107340250A CN 107340250 A CN107340250 A CN 107340250A CN 201710653819 A CN201710653819 A CN 201710653819A CN 107340250 A CN107340250 A CN 107340250A
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- light
- photoelectric receiving
- receiving tube
- loop
- analog
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- 238000004458 analytical method Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 14
- 230000029087 digestion Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004445 quantitative analysis Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to chemical on-line quantitative analysis fields of measurement, and in particular to a kind of double light-metering light path COD on-line analysis measuring instruments.Double light-metering light path COD on-line analyses measuring instruments include voltage-stabilized power supply loop, constant current loop, luminous tube, spectroscope, photoelectric receiving tube A, analog-to-digital conversion loop A, digestion pool, photoelectric receiving tube B, analog-to-digital conversion loop B and MCU processing display circuits, it is characterized in that, the light all the way that luminous tube is sent becomes two-way light by 1/2 spectroscopical Transflective, reflected light incides photoelectric receiving tube A all the way, another way transmitted light passes through the digestion pool containing sample, reaches on photoelectric receiving tube B.Usefulness of the present invention is that when the river rises the boat goes up and the water line of ship is constant using double light-metering light paths, overcomes measured value caused by temperature change and becomes minor issue.
Description
Technical field
The invention belongs to chemical on-line quantitative analysis fields of measurement, and in particular to a kind of double light-metering light path COD on-line analyses
Measuring instrument.
Background technology
Spectrophotometric method is the common method of chemical analysis measurement, and the conventional side of monitoring water quality on line measuring instrument
Method.The problems of the existing full-automatic in-line analyzers of monochromatic light road Cod temperature influences measurement result.Environment temperature raises,
Measurement result declines compared with the higher environment temperature of actual value, and measurement result is relatively low compared with actual value.Experiment is found repeatedly, and Cod is full-automatic
The luminous factor of the change of on-line analysis apparatus measuring value and luminous tube itself is relevant.Luminous tube luminous power is with environment temperature in anti-
Than：Environment temperature raises, and the luminous flux that lights declines.Actual measurement, since 30 degree Celsius, to 85 degree Celsius, light luminous flux
Electric current drop to 18 from 25, as shown in Figure 1.Obviously, the influence of luminous tube is too big！How to solve variation of ambient temperature to cause
ErrorBig marine big ship is associated, when the river rises the boat goes up, but the water line invariance principle of ship, if in optical system for testing photoelectric tube
One end of luminous light path, installs 45 degree of spectroscopes additional, and optical system for testing has reformed into straight trip light path and 90 degree of vertical reflected light paths, i.e., double
Light path.Select the spectroscope of 1/2 transmissivity, the luminous flux after double light path is divided into two, and the power of two-way light respectively accounts for half, vertically
Light path is reflected light luminous flux I1, straight trip light path is transmitted light luminous flux I2, two-way luminous flux is identical, I1=I2.Straight trip light path light
Flux I2Through digestion pool, because the solution in digestion pool absorbs, luminous flux diminishes, becomePhotoelectric tube of the direct projection to light-metering
On, complete the full-automatic in-line analyzer measurements of Cod；The I on vertical reflected light path1, also add the photoelectric tube of a light-metering, monitor hair
The power of light pipe.Thus become double light-metering light paths.Because the power of two-way light respectively accounts for half, I1=I2, risen ship according to water
High, waterline invariance principle,The requirement of optical spectroscopy COD measurement langbobier law is fully met, and now
COD measured values are unrelated with environment temperature.During practical application, double light-metering light paths are integral structures, insert and disappear in light path of keeping straight on
Xie Chi.
The content of the invention
Technical scheme：Double light-metering light path COD on-line analyses measuring instruments include voltage-stabilized power supply loop, constant current is returned
Road, luminous tube, spectroscope, photoelectric receiving tube A, analog-to-digital conversion loop A, digestion pool, photoelectric receiving tube B, analog-to-digital conversion loop B and
MCU handles display circuit, it is characterized in that, voltage-stabilized power supply loop electrical connection constant current loop, analog-to-digital conversion loop A, analog-to-digital conversion are returned
Road B and MCU processing display circuit, constant current loop electrical connection luminous tube, the parallel light connects spectroscope of luminous tube, photoelectric receiving tube A,
Digestion pool and photoelectric receiving tube B；Photoelectric receiving tube A electrically connects analog-to-digital conversion loop A, analog-to-digital conversion loop A electrical connection MCU processing
Display circuit；Photoelectric receiving tube B electrically connects analog-to-digital conversion loop B, analog-to-digital conversion loop B electrical connection MCU processing display circuits.
Described double light-metering light path COD on-line analysis measuring instruments, it is characterized in that, luminous tube selects the 600nm of integral packaging
Laser diode and 595-605nm optical filters；Photoelectric receiving tube is from integral packagingPhotovoltaic cell module, photocell load electricity
Resistance and 595-605nm optical filters；The laser all the way that 600nm laser diodes are sent passes through 595-605nm optical filters, by 1/2
Become two-way light after spectroscopical Transflective, reflected light incides photoelectric receiving tube A all the way, and another way transmitted light is then passed through containing
There is the digestion pool of sample, again pass through 595-605nm optical filters and reach on photoelectric receiving tube B.
Described double light-metering light path COD on-line analysis measuring instruments, it is characterized in that the socket of 5 pin 5.08 is selected in voltage-stabilized power supply loop
External power is electrically connected, is exported using the voltage stabilizing of LM7805 chips.
Described double light-metering light path COD on-line analysis measuring instruments, it is characterized in that constant current loop selects LM741 chips, constant current
Loop electrically connects luminous tube by the socket of 5 pin 2.54.
Described double light-metering light path COD on-line analysis measuring instruments, it is characterized in that AD420AN-32 is selected in analog-to-digital conversion loop
Chip and the socket of 5 pin 2.54, analog-to-digital conversion loop electrically connect photoelectric receiving tube by the socket of 5 pin 2.54.
Described double light-metering light path COD on-line analysis measuring instruments, it is characterized in that MCU processing display circuits select ARM740T
Chip, (normal work is shown) green LED lamp, (malfunction coefficient) red LED lamp and two sockets of 5 pin 2.54, MCU processing displays
Circuit passes through two outside display circuits of the socket of 5 pin 2.54 electrical connection.
The operation principle summary of double light-metering light path COD on-line analysis measuring instruments：Voltage-stabilized power supply loop passes through the socket of 5 pin 5.08
Peripheral hardware dc source is received, is supplied after 5V voltage stabilizings at constant current loop, analog-to-digital conversion loop A, analog-to-digital conversion loop B and MCU
Manage display circuit work.Constant current loop supply luminous tube work, constant current ensure that 600nm laser diode output light fluxs are constant not
Become.Light-receiving loopLight intensity is transformed into voltage by photovoltaic cell module and load resistance, and voltage is believed by analog-to-digital conversion into numeral
Number input MCU processing display circuit ARM740T chips；Green LED lamp is bright during normal work, and when abnormal, red LED lamp is bright；
ARM740T chips pass through the socket output digit signals of 5 pin 2.54 or pulsewidth pwm signal, for external piloting control circuit board.
The usefulness of double light-metering light path COD on-line analysis measuring instruments of the invention is that when the river rises the boat goes up using double light-metering light paths
And waterline is constant, overcomes measured value caused by temperature change and become minor issue.Double light-metering light path COD on-line analysis measuring instruments
Usefulness be measuring circuit modularization intelligent, reliable operation, long lifespan, it is convenient to change during damage, by modularization group
The on-line measurement Instrument working state of dress is obvious, safeguards directly perceived, convenient maintenance and replacement, and have intellectualized module function.
Brief description of the drawings
The luminous tube temperature characteristics of the double light-metering light path COD on-line analysis measuring instruments of Fig. 1
Double light-metering index paths of the double light-metering light path COD on-line analysis measuring instruments of Fig. 2
The module and main modular electrical connection directional light connection diagram of the double light-metering light path COD on-line analysis measuring instruments of Fig. 3
In figure：1st, voltage-stabilized power supply loop, 2, constant current loop, 3, luminous tube, 4, spectroscope, 5, photoelectric receiving tube A, 6, modulus
Conversing circuits A, 7, digestion pool, 8, photoelectric receiving tube B, 9, analog-to-digital conversion loop B, 10, MCU processing display circuits.
Embodiment
The double light-metering light path COD on-line analyses of XHX-COD2016-1 that embodiment is produced with Shanxi Xin Huaxiang Co., Ltds are surveyed
Instrument is measured, under Shanxi Xin Huaxiang Co., Ltds supervise, on the company's waste water biochemical oxygen demand monitoring point of south wind group 5, is illustrated such as
Under：Voltage-stabilized power supply loop is exported from the socket of 5 pin 5.08 electrical connection peripheral hardware 6v power supplys using the voltage stabilizing of LM7805 chips.Constant current is returned
LM741 chip constant currents are selected on road, and constant current loop electrically connects luminous tube by the socket of 5 pin 2.54.The pole of 600nm laser two of luminous tube
Pipe and 595-605nm being made of one of optical filterCylinder, it is generally called luminous tube；Photoelectric receiving tube usesPhotovoltaic cell module,
Photocell load resistance and 595-605nm optical filters also being made of oneTwo groups of cylinder, it is generally called photoelectric receiving tube；Use
When, it is only necessary to these three cylinders are matched in the optics preformed hole above and below the left and right sides of digestion instrument, the pole of 600nm laser two
The laser that pipe is sent passes through 595-605nm optical filters, incides 1/2 spectroscope, is divided into two-beam road, vertical reflected light path, thoroughly
Straight trip light path is penetrated, two-way light luminous flux is identical.Vertical reflected light path incides photoelectric receiving tube A；Transmission straight trip light path, which passes through, to be contained
There is the digestion pool of sample, incide photoelectric receiving tube B, light quantity signal becomes voltage signal.Analog-to-digital conversion loop passes through 5
The socket of pin 2.54 electrically connects photoelectric receiving tube, and voltage signal inputs MCU processing display circuits after analog-to-digital conversion.Normal work
When, green LED lamp is bright, otherwise malfunction coefficient red LED lamp is bright.MCU processing display circuits are exported by two sockets of 5 pin 2.54
0.4-2v or PWM or UART rs 232 serial interface signals.The circuit board of double light-metering light path COD on-line analysis measuring instruments of the invention uses full paster
Technique, profile only have 57.5*34.1mm.Operating voltage 5.5-6.5v, operating current are less than 100mA, interface level 5.0v, measurement
The limit, 0.08mg/L, drift are less than ± 5%. COD on-line measurement instruments suitable for surface water or sewage.
The usefulness of double light-metering light path COD on-line analysis measuring instruments of the invention is that when the river rises the boat goes up using double light-metering light paths
And waterline is constant, overcomes measured value caused by temperature change and become minor issue.Double light-metering light path COD on-line analysis measuring instruments
Usefulness be measuring circuit modularization intelligent, reliable operation, long lifespan, it is convenient to change during damage, by modularization group
The on-line measurement Instrument working state of dress is obvious, safeguards directly perceived, convenient maintenance and replacement, and have intellectualized module function.
Claims (2)
1. pair light-metering light path COD on-line analyses measuring instrument includes voltage-stabilized power supply loop, constant current loop, luminous tube, spectroscope, photoelectricity
Reception pipe A, analog-to-digital conversion loop A, digestion pool, photoelectric receiving tube B, analog-to-digital conversion loop B and MCU processing display circuits, it is special
Sign is voltage-stabilized power supply loop electrical connection constant current loop, analog-to-digital conversion loop A, analog-to-digital conversion loop B and MCU processing display circuits,
Constant current loop electrically connects luminous tube, the parallel light connects spectroscope of luminous tube, photoelectric receiving tube A, digestion pool and photoelectric receiving tube B；
Photoelectric receiving tube A electrically connects analog-to-digital conversion loop A, analog-to-digital conversion loop A electrical connection MCU processing display circuits；Photoelectric receiving tube B
Electrically connect analog-to-digital conversion loop B, analog-to-digital conversion loop B electrical connection MCU processing display circuits.
2. double light-metering light path COD on-line analysis measuring instruments as claimed in claim 1, it is characterized in that, luminous tube is sealed from one
The 600nm laser diodes and 595-605nm optical filters of dress, abbreviation luminous tube；Photoelectric receiving tube is from integral packaging
Photovoltaic cell module, photocell load resistance and 595-605nm optical filters, abbreviation photoelectric receiving tube；600nm laser diodes are sent
Laser passes through 595-605nm optical filters all the way, becomes two-way light after 1/2 spectroscopical Transflective, reflected light enters all the way
Photoelectric receiving tube A is mapped to, another way transmitted light is then passed through the digestion pool containing sample, again passes through 595-605nm optical filterings
Piece is reached on photoelectric receiving tube B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653819.1A CN107340250A (en) | 2017-07-27 | 2017-07-27 | Double light-metering light path COD on-line analysis measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653819.1A CN107340250A (en) | 2017-07-27 | 2017-07-27 | Double light-metering light path COD on-line analysis measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107340250A true CN107340250A (en) | 2017-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710653819.1A Pending CN107340250A (en) | 2017-07-27 | 2017-07-27 | Double light-metering light path COD on-line analysis measuring instruments |
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| CN (1) | CN107340250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406358A (en) * | 2018-12-10 | 2019-03-01 | 山西鑫华翔科技发展有限公司 | A kind of reflect adds transmission beam method haze particle stream concentration redundant measurement device |
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-
2017
- 2017-07-27 CN CN201710653819.1A patent/CN107340250A/en active Pending
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| KR100927847B1 (en) * | 2009-03-02 | 2009-11-23 | 정성봉 | A total organic carbon analyzer |
| US20160124078A1 (en) * | 2013-03-08 | 2016-05-05 | Jiangsu Laitz Optoelectronics Technology Co., Ltd. | Calibration method based on dual-transmitting dual-receiving phase measurement and distance-measuring device thereof |
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| CN109406358A (en) * | 2018-12-10 | 2019-03-01 | 山西鑫华翔科技发展有限公司 | A kind of reflect adds transmission beam method haze particle stream concentration redundant measurement device |
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Application publication date: 20171110 |