CN201028995Y - Multi-light beam suspended substance concentration measuring apparatus - Google Patents
Multi-light beam suspended substance concentration measuring apparatus Download PDFInfo
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- CN201028995Y CN201028995Y CNU2007200006319U CN200720000631U CN201028995Y CN 201028995 Y CN201028995 Y CN 201028995Y CN U2007200006319 U CNU2007200006319 U CN U2007200006319U CN 200720000631 U CN200720000631 U CN 200720000631U CN 201028995 Y CN201028995 Y CN 201028995Y
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- photodetector
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Abstract
The utility model discloses a concentration measurement device for the multiple beam suspended substance. Two light emitters and two photoelectric probes are used. The two light emitters send out measuring light alternatively. When one light emitter is measuring, the two photoelectric probes can inspect the intensity of the light that passes the suspended fluid and determine the concentration of the suspended fluid according to the intensity of the light detected by the photoelectric probes. The utility model can eliminate the influence of the light source intensity changes and the sensitivity of the receiver to the measuring precision, overcome the influence of light pollution at the surface of the lens, lower the measuring difference caused by the shade of the tested object, so that the utility model can be widely used in occasions including large scale sewage treatment works.
Description
Technical field
The utility model relates to a kind of apparatus for measuring concentration, can measure the concentration of the suspended material (for example various materials such as mud, ore pulp) in the fluid.Particularly relate to the photo-electric densimeter that accurately to measure the wide measurement range inner suspension substrate concentration from the low concentration to the high concentration.
Background technology
In sewage treatment project and in other engineering of water treatment, concentration of suspension is an important controlled variable.
Concentration of suspension is measured commonly used have optics and two kinds of methods of ultrasound wave.Ultrasonic method is to send ultrasound wave from a crystal, receives in another piece crystal, if suspended solid amount is big more in the tested solution, the energy of the ripple of reception is extra small.Because sonolucent is very capable, only the transmission attenuation variation is apparent in view when high value concentration of suspension, and it is used to measure the better regional of high concentration value, and when measuring the suspension of low concentration, resolving power is relatively poor.Simultaneously, ultrasonic wave measuring method is subjected to the influence of air bubbles in the mud easily, can't be used in the aeration tank of sewage treatment project.
Second method is an optical means.Optical means commonly used is to utilize a branch of light to carry out the concentration of suspension measurement through the transmission performance in mixed liquor time.
Light transmission has a light source, and light directly impinges upon on the receiving element after seeing through measured object.After the absorption of light process measured object, reflection and the scattering sub-fraction light transmissive is only arranged.Concern between the suspended solids content in the transmissivity of transmitted light and the tested sewage, can use that Lang Baite---Beer law is described, can be write as behind the simplified formula
V＝I
a·K·[exp(-β·L·c)]
V transmission light intensity
I
aLight source luminescent intensity
The K light-transmission coefficient
The absorption coefficient of β suspension
The L light path
The c concentration of suspension
The light transmission of this single beam problem in actual applications is more, mainly is that the pollution of stability of light source and sensor optical window is very big to the influence of measuring accuracy.
The utility model content
The utility model proposes the device of concentration of suspension in a kind of novel measurement suspending liquid, different with the light transmission of above-mentioned single beam, this device to tested suspending liquid projection measuring light, detect the transmission light intensity that four bundles see through from tested suspending liquid, and count in according to the intensitometers of four bundle transmitted lights and to state concentration of suspension in the tested suspending liquid.Because four bundle transmitted lights constitute one and measure matrix, the light source intensity of having cancelled out each other in calculating changes and the isoparametric influence of receptacle change of sensitivity, so this device has overcome the shortcoming of the light transmission of original single beam, have variation of the light source intensity of elimination and receiver sensitivity and change, can overcome advantages such as harmful effect that the lens surface slight pollution causes the measuring accuracy influence.
Measurement mechanism adopts two optical transmitting sets and two photodetectors, two optical transmitting sets replace emission measurement light, each optical transmitting set emission measurement light time, two photodetectors detect the light intensity that sees through from tested suspending liquid simultaneously, and the light intensity that detects according to photodetector calculates concentration of suspension in the tested suspending liquid.
Every measurement once, two optical transmitting sets replace each emission measurement light once, each detects two photodetectors and sees through light intensity twice, has four detected values, can calculate concentration of suspension with these four detected values.
Measurement mechanism comprises: first optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13, the first optical transmitting set driving circuit 14, the second optical transmitting set driving circuit 15, the first photodetector bandwidth-limited circuit 19, the first photodetector programmable gain circuit 20, the first photodetector detecting circuit 21, the second photodetector bandwidth-limited circuit 16, the second photodetector programmable gain circuit 17, the second photodetector detecting circuit 18, microcontroller circuit 22 etc.First optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13 are installed in the same housing, constitute the Sensor section of measurement mechanism; The first optical transmitting set driving circuit 14, the second optical transmitting set driving circuit 15, the first photodetector bandwidth-limited circuit 19, the first photodetector programmable gain circuit 20, the first photodetector detecting circuit 21, the second photodetector bandwidth-limited circuit 16, the second photodetector programmable gain circuit 17, the second photodetector detecting circuit 18, microcontroller circuit 22 are installed in the instrument box, constitute the secondary instrument part of measurement mechanism; Under the secondary instrument control partly of measurement mechanism, two optical transmitting sets 10,11 replace emission measurement light, each optical transmitting set emission measurement light time, two photodetectors 12,13 detect the light intensity that sees through from tested suspending liquid simultaneously, and the light intensity that detects according to photodetector calculates concentration of suspension in the tested suspending liquid.
This new measurement has the variation of the light source intensity of elimination and the receiver sensitivity variation influences measuring accuracy, can overcome lens surface harmful effect that slight pollution causes, simultaneously the advantages such as measuring error that measurand colourity causes can also be reduced, most of occasion of sewage treatment plant can be applied in.
The purpose of this utility model is to provide a kind of novel concentration of suspension measurement mechanism, this device can overcome the influence of factors such as device aging, optical window pickup, temperature variation, stable, measurement data accurately is provided, reduce maintenance workload, be particularly suitable for work on the spot environment abominable in the sewage disposal process.
Description of drawings
Fig. 1 is that the measurement mechanism light path constitutes synoptic diagram.
Fig. 2 is a measurement mechanism basic comprising synoptic diagram.
Fig. 3 is the sensor construction figure of embodiment.
Fig. 4 is the correlation curve figure of embodiment.
Embodiment
As shown in Figure 1, measuring light route first optical transmitting set 10, second optical transmitting set 11 and first photodetector 12, second photodetector 13 constitute.Two optical transmitting sets are alternately luminous, and when the 10 emission measurement light time of first optical transmitting set, second optical transmitting set 11 cuts out, and at this moment, two photodetectors 12,13 are measured the transmission light intensity simultaneously; Equally, when the 11 emission measurement light time of second optical transmitting set, first optical transmitting set 10 cuts out, and at this moment, two photodetectors 12,13 are measured the transmission light intensity simultaneously.
The formation of embodiment of the present utility model as shown in Figure 2, mainly by first optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13, the first optical transmitting set driving circuit 14, the second optical transmitting set driving circuit 15, the first photodetector bandwidth-limited circuit 19, the first photodetector programmable gain circuit 20, the first photodetector detecting circuit 21, the second photodetector bandwidth-limited circuit 16, the second photodetector programmable gain circuit 17, the second photodetector detecting circuit 18, microcontroller circuit 22 grades partly constitute.First optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13 are installed in the same housing, constitute the Sensor section of measurement mechanism; The first optical transmitting set driving circuit 14, the second optical transmitting set driving circuit 15, the first photodetector bandwidth-limited circuit 19, the first photodetector programmable gain circuit 20, the first photodetector detecting circuit 21, the second photodetector bandwidth-limited circuit 16, the second photodetector programmable gain circuit 17, the second photodetector detecting circuit 18, microcontroller circuit 22 are installed in the instrument box, constitute the secondary instrument part of measurement mechanism;
Sensor section is made of shell 1, first optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13 etc. as shown in Figure 3.The relative position of optical transmitting set and photodetector is pressed diagramatic way and is arranged.
During measurement, sensor is immersed in the tested suspending liquid, all is full of tested suspending liquid between first optical transmitting set 10, second optical transmitting set 11, first photodetector 12, second photodetector 13.
The basic process of measuring is described below.
At first, the electric signal that the microcontroller circuit 22 controls first optical transmitting set driving circuit 14 sends modulation waveform drives first optical transmitting set, 10 emission measurement light, this moment, second optical transmitting set 11 cut out, first photodetector 12 is measured the transmission light intensity that sees through tested suspension, through the first photodetector bandwidth-limited circuit, 19 filtering interference signals, carry out processing and amplifying through 20 pairs of signals of the first photodetector programmable gain circuit again, send into behind 21 pairs of signal demodulators of the first photodetector detecting circuit again that microcontroller circuit 22 is gathered and processing obtains V
1aSimultaneously, second photodetector 13 is also measured the transmission light intensity that sees through tested suspension, through the second photodetector bandwidth-limited circuit, 16 filtering interference signals, carry out processing and amplifying through 17 pairs of signals of the second photodetector programmable gain circuit again, send into behind 18 pairs of signal demodulators of the second photodetector detecting circuit again that microcontroller circuit 22 is gathered and processing obtains V
2a
Then, the electric signal that the microcontroller circuit 22 controls second optical transmitting set driving circuit 15 sends modulation waveform drives second optical transmitting set, 11 emission measurement light, this moment, first optical transmitting set 10 cut out, first photodetector 12 is measured the transmission light intensity that sees through tested suspension, through the first photodetector bandwidth-limited circuit, 19 filtering interference signals, carry out processing and amplifying through 20 pairs of signals of the first photodetector programmable gain circuit again, send into behind 21 pairs of signal demodulators of the first photodetector detecting circuit again that microcontroller circuit 22 is gathered and processing obtains V
1bSimultaneously, second photodetector 13 is also measured the transmission light intensity that sees through tested suspension, through the second photodetector bandwidth-limited circuit, 16 filtering interference signals, carry out processing and amplifying through 17 pairs of signals of the second photodetector programmable gain circuit again, send into behind 18 pairs of signal demodulators of the second photodetector detecting circuit again that microcontroller circuit 22 is gathered and processing obtains V
2b
Be mixed with the suspending liquid of variable concentrations with SiO 2 powder, demarcate the back with this embodiment and measure, actual measurement data is as shown in the table, correlation curve as shown in Figure 5, the actual measurement precision can reach ± 1%FS.
| Sequence number | 1 | 2 | 3 | 4 | 5 | 6 |
| Actual value mg/ |
0 | 1000 | 5000 | 20000 | 100000 | 400000 |
| Measured value mg/ |
0 | 1015 | 5028 | 19920 | 101100 | 402000 |
| |
0 | 0.003％FS | 0.007％FS | -0.02％FS | 0.275％FS | 0.5％FS |
Claims (2)
1. device of measuring concentration of suspension in the suspending liquid, this device is to tested suspending liquid projection measuring light, the light intensity that detection sees through from this tested suspending liquid and according to concentration of suspension the above-mentioned tested suspending liquid of this ionization meter, it is characterized in that: this measurement mechanism comprises first optical transmitting set (10), second optical transmitting set (11), first photodetector (12), second photodetector (13), two optical transmitting sets replace emission measurement light, each optical transmitting set emission measurement light time, two photodetectors detect the light intensity that sees through from tested suspending liquid simultaneously, and the light intensity that detects according to photodetector calculates concentration of suspension in the tested suspending liquid.
2. by the described measurement mechanism of claim 1, it is characterized in that: also comprise: the first optical transmitting set driving circuit (14), the second optical transmitting set driving circuit (15), the first photodetector bandwidth-limited circuit (19), the first photodetector programmable gain circuit (20), the first photodetector detecting circuit (21), the second photodetector bandwidth-limited circuit (16), the second photodetector programmable gain circuit (17), the second photodetector detecting circuit (18), microcontroller circuit (22) etc.; First optical transmitting set (10), second optical transmitting set (11), first photodetector (12), second photodetector (13) are installed in the same housing, constitute the Sensor section of measurement mechanism; The first optical transmitting set driving circuit (14), the second optical transmitting set driving circuit (15), the first photodetector bandwidth-limited circuit (19), the first photodetector programmable gain circuit (20), the first photodetector detecting circuit (21), the second photodetector bandwidth-limited circuit (16), the second photodetector programmable gain circuit (17), the second photodetector detecting circuit (18), microcontroller circuit (22) are installed in the instrument box, constitute the secondary instrument part of measurement mechanism; Under the secondary instrument control partly of measurement mechanism, two optical transmitting sets (10,11) are emission measurement light alternately, each optical transmitting set emission measurement light time, two photodetectors (12,13) detect the light intensity that sees through from tested suspending liquid simultaneously, and the light intensity that detects according to photodetector calculates concentration of suspension in the tested suspending liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200006319U CN201028995Y (en) | 2007-01-11 | 2007-01-11 | Multi-light beam suspended substance concentration measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200006319U CN201028995Y (en) | 2007-01-11 | 2007-01-11 | Multi-light beam suspended substance concentration measuring apparatus |
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|---|---|
| CN201028995Y true CN201028995Y (en) | 2008-02-27 |
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| CNU2007200006319U Expired - Lifetime CN201028995Y (en) | 2007-01-11 | 2007-01-11 | Multi-light beam suspended substance concentration measuring apparatus |
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| CN (1) | CN201028995Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398953A (en) * | 2013-08-14 | 2013-11-20 | 中山欧麦克仪器设备有限公司 | Remote control sludge concentration detector |
| CN105548018A (en) * | 2015-11-30 | 2016-05-04 | 临沂大学 | Device and method for measuring solid content of solid-liquid system |
| CN106645036A (en) * | 2017-01-17 | 2017-05-10 | 中国科学院计算技术研究所 | Liquid turbidity measuring device and measuring method thereof |
-
2007
- 2007-01-11 CN CNU2007200006319U patent/CN201028995Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398953A (en) * | 2013-08-14 | 2013-11-20 | 中山欧麦克仪器设备有限公司 | Remote control sludge concentration detector |
| CN105548018A (en) * | 2015-11-30 | 2016-05-04 | 临沂大学 | Device and method for measuring solid content of solid-liquid system |
| CN105548018B (en) * | 2015-11-30 | 2018-11-06 | 临沂大学 | The measuring device and measuring method of solid content in a kind of solid-liquid system |
| CN106645036A (en) * | 2017-01-17 | 2017-05-10 | 中国科学院计算技术研究所 | Liquid turbidity measuring device and measuring method thereof |
| CN106645036B (en) * | 2017-01-17 | 2019-06-18 | 中国科学院计算技术研究所 | Liquid turbidity measuring device and its measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Tengine Innovation Instrument Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Tengine innovation Instrument Co. Ltd. is responsible for the patent Document name: Notification to Go Through Formalities Rectification of Restoration of Right |
|
| C56 | Change in the name or address of the patentee |
Owner name: TENGINE INNOVATION (BEIJING) INSTRUMENT INC. Free format text: FORMER NAME: BEIJING TENGINE INNOVATION INSTRUMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100085, building 2, No. 66, Zhongguancun East Road, Beijing, Haidian District 1707 Patentee after: Tengine innovation (Beijing) monitoring instrument Limited by Share Ltd Address before: 100085, No. 36, 5 middle road, Haidian District, Beijing, 504 Patentee before: Beijing Tengine Innovation Instrument Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080227 |
|
| EXPY | Termination of patent right or utility model |