CN104121965A - Oily water detection device and detection method thereof - Google Patents
Oily water detection device and detection method thereof Download PDFInfo
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- CN104121965A CN104121965A CN201410388819.XA CN201410388819A CN104121965A CN 104121965 A CN104121965 A CN 104121965A CN 201410388819 A CN201410388819 A CN 201410388819A CN 104121965 A CN104121965 A CN 104121965A
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Abstract
The invention discloses an oily water detection device and a detection method of the oily water detection device. The oily water detection device is characterized by comprising a detection cavity, wherein the detection cavity is vertically arranged and sequentially comprises an upper pipe, an expansion pipe and a lower pipe from top to bottom, a sensor module is embedded in two lateral walls of the expansion pipe, the inner space of the expansion pipe is filled wit air or anti-explosion gas to play a role in resisting oil dirt or pollution, the sensor module is connected with an amplifying circuit, the amplifying circuit is connected with an A/D converter, and the A/D converter is connected with a single-chip microcomputer. Through the structure, liquid to be detected is separated from a sensor, and the dirt resistance of the detection device is improved.
Description
Technical field
The invention belongs to profit detection field, specifically, relate to a kind of profit pick-up unit and method based on isolation thought.
Background technology
Oil is one of most important energy substance in the world, is mainly used as fuel oil and gasoline.In the exploitation and chemical process of oil, by water effective to extract be extremely complicated.Because the density difference of various materials there will be water layer, oil reservoir and air layer etc. in detachment process, want to carry out exactly oil and water separation, just must detect accurately water-oil interface, produced profit detection technique like this.Conventional detection method has at present: capacitance method, radio frequency method, shortwave method etc.Photoelectric detecting method is also one of important detection method, but greasy dirt has fatefulue impact to existing photoelectric detecting method, and it cannot be applied for a long time.
Summary of the invention
Technical matters to be solved by this invention is the impact of pin greasy dirt on photoelectric detecting method, and a kind of profit pick-up unit and detection method thereof with resistance to/oil rub resistance or pollution is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize:
A kind of profit pick-up unit, it is characterized in that: comprise test chamber, test chamber is vertically placed, described test chamber comprises pipe, dilatation pipe and lower pipe from top to bottom successively, sensor assembly embeds in the two side of dilatation pipe, described sensor assembly is connected with amplifying circuit, and amplifying circuit connects A/D converter, and A/D converter is connected with single-chip microcomputer.
Aforesaid profit pick-up unit, is characterized in that: described sensor assembly comprises: first sensor, for detection of liquid stream thickness; The second sensor, for detection of liquid stream kind; The 3rd sensor, for detection of impurity concentration in liquid stream.
Aforesaid profit pick-up unit, is characterized in that: dilatation pipe inner space is air or anti-explosion gas, with isolation sensor and detected medium.
Aforesaid profit pick-up unit, is characterized in that: described first sensor is correlation imaging electric transducer, first sensor output electrical signals, and electric signal and the liquid of output to flow thickness d linear.
Aforesaid profit pick-up unit, is characterized in that: described the second sensor is photoelectric sensor, sonac or capacitive transducer, the second sensor output electrical signals and transmitted light intensity I
1linear.
Aforesaid profit pick-up unit, is characterized in that: described the 3rd sensor is photoelectric sensor, the 3rd sensor output electrical signals and scattered light intensity I
2linear.
The detection method of profit pick-up unit, is characterized in that, comprises the following steps:
1) test chamber is vertically placed, and inject liquid to be detected;
2) when liquid to be detected is stablized by test chamber, sensor assembly detects the electric signal obtaining, first sensor obtains the electric signal of the thickness of liquid stream to be detected, the second sensor obtains the electric signal of the composition of liquid to be detected, the 3rd sensor obtains the impurity concentration electric signal of liquid to be detected, and sensor assembly is exported corresponding three road electric signal according to testing result;
3) sensor assembly output San road electric signal amplifies through analog amplify circuit, is converting digital signal to via A/D change-over circuit;
4) digital signal of acquisition is first carried out medium filtering by single-chip microcomputer, then carry out following data processing:
41) electric signal the second sensor being obtained is converted to transmitted light intensity I
1, by transmitted light intensity I
1the transmitted light intensity I of the bright rich Beer law of substitution; The electric signal that first sensor is obtained is converted to liquid stream thickness d, and liquid is flowed to thickness d substitution langbobier law:
I
1=I
0e
-α 1din formula, I
0flow surperficial light intensity for inciding liquid to be measured, there is no the light intensity that in the situation of liquid stream, the second sensor receives; α 1 is liquid flow medium absorption coefficient, reflection liquid stream kind; D is liquid stream thickness;
42) obtain reflecting that liquid flows the liquid flow medium absorption coefficient 1 of kind;
43) electric signal the 3rd sensor being obtained converts scattered light intensity I to
2signal, by scattered light intensity I
2substitution langbobier law, i.e. I
2=I
0e
-α 2din formula, obtain reflecting another liquid flow medium absorption coefficient 2 of impurity concentration, calculate m=α 1/ α 2, search m value and concrete medium kind mapping table, obtain the medium kind of liquid stream, the m value that medium is corresponding is a scope, and oil and the water respectively scope of corresponding m value obtain according to experimental calibration.
Described first sensor is based on CCD, it is charge-coupled image sensor, correlation imaging electric transducer with parallel projection light, parallel projection light projects the upper imaging on CCD of liquid stream, because liquid stream blocks parallel projection light, the liquid imaging on CCD that fails to be convened for lack of a quorum, because light source is parallel projection light, imaging proportionate relationship be 1:1, cut apart and obtain Ye Liu projection image by OSTU method, the number of pixels N that statistics projection image is contained, liquid stream thickness d=N × b, b is CCD pixel dimension, the output electrical signals of liquid stream thickness d and first sensor is linear, demarcate by experiment scale-up factor.
Described the second sensor is photoelectric sensor, sonac or capacitive transducer, the second sensor output electrical signals and transmitted light intensity I
1linear.
The second sensor will to flow kind relevant to liquid, and such as measuring water, need to select wavelength is the 1.13um near infrared light that water absorptivity is higher, can select projection-type IR204/PT202C type infrared electro to pipe.The incident intensity I of the second sensor
0for the setting value of sensor, see through the transmitted light intensity I detecting after liquid stream
1relevant with concrete liquid stream kind, and linear with the output voltage of the second sensor, demarcate by experiment scale-up factor, in like manner, and the sound intensity that sonac detects, the voltage swing that capacitive transducer detects is all relevant with tool body fluid flow kind.
Described the 3rd sensor is photoelectric sensor, because impurity has scattering process to light, so scattered light intensity I
2relevant with impurity content, demarcate by experiment with the relation of the output voltage of the 3rd sensor.
The invention has the beneficial effects as follows by said structure and detection method, improved the resistant to pollution ability of pick-up unit, can reduce the maintenance times of device, increased serviceable life.Simultaneously simple in structure, with low cost, be easy to promote.
Brief description of the drawings
Fig. 1 is resistant to pollution oil, water and the mixed liquor structure of the detecting device schematic diagram based on isolation thought;
Fig. 2 is available a kind of analog amplify circuit figure;
Fig. 3 is available a kind of A/D change-over circuit figure.
Embodiment
Below in conjunction with drawings and Examples, patent of the present invention is further illustrated.
Structure of the detecting device as shown in Figure 1, this device adopts separation principle, be that sensor does not contact with detection medium, package unit comprises test chamber, sensor assembly, analog amplify circuit, A/D modular converter and single-chip microcomputer, wherein said test chamber is vertically placed, by upper pipe 1, 6 three part compositions of dilatation pipe 2 and lower pipe, described sensor assembly configuration embeds in the two side of dilatation pipe, when measurement due to the pressure difference of top tube and down tube, liquid to be detected flows into dilatation pipe by upper pipe, flowed out by lower pipe again, the surveyed area of passage in transit sensor but do not contact with sensor, described sensor assembly divides three parts, two parts transmitting terminals 3 of first sensor and receiving end 9 can detect liquid stream thickness, two parts transmitting terminals 4 of the second sensor and receiving end 8 are for detection of liquid stream kind, due to oil, the output electrical signals of the different in kind sensor of water and mixed liquor changes thereupon, two parts transmitting terminals 5 of the 3rd sensor and receiving end 7 are for detection of impurity concentration in liquid stream, the small electrical signals obtaining is amplified with analog amplify circuit, then convert simulating signal to digital signal with A/D converter again, again A/D converter is connected with single-chip microcomputer, Single Chip Microcomputer (SCM) program is by the signal intensity rate of the second sensor and first sensor and the 3rd sensor signal, compare with relational model to be measured, determine which kind of medium detected medium is.
Dilatation pipe inner space can be air, also can be filled with anti-explosion gas according to requirement of explosion proof, such as nitrogen etc.
First sensor used can be distinguished liquid stream thickness, can be photoelectric sensor, sonac or capacitive transducer.As first sensor is selected shading type photoelectric sensor.
The second sensor used can be distinguished detected medium, can be photoelectric sensor, sonac or capacitive transducer.As the second sensor selects projection-type IR204/PT202C type infrared electro to pipe.
The 3rd sensor used can be distinguished impurity concentration in liquid stream, can be photoelectricity scattering sensor, ultrasonic scattering sensor.As the 3rd sensor is selected reflective RBCB30 type photoelectric sensor.
First sensor and the second sensor output signal are removed noise through medium filtering, and then the signal intensity rate by the second sensor and first sensor and the 3rd sensor signal and relational model to be measured determine which kind of medium detected medium is.
The second sensor and first sensor signal intensity rate and the 3rd sensor signal and relational model to be measured obtain data by the experiment of sample to be detected, then set up corresponding detection model by fitting of a polynomial.
The detection method of profit pick-up unit, is characterized in that, comprises the following steps:
Comprise the following steps:
1) test chamber is vertically placed, and inject liquid to be detected;
2) when liquid to be detected is stablized by test chamber, sensor assembly detects the electric signal obtaining, first sensor obtains the electric signal of the thickness of liquid stream to be detected, the second sensor obtains the electric signal of the composition of liquid to be detected, the 3rd sensor obtains the impurity concentration electric signal of liquid to be detected, and sensor assembly is exported corresponding three road electric signal according to testing result;
3) sensor assembly output San road electric signal amplifies through analog amplify circuit, is converting digital signal to via A/D change-over circuit;
4) digital signal of acquisition is first carried out medium filtering by single-chip microcomputer, then carry out following data processing:
41) electric signal the second sensor being obtained is converted to transmitted light intensity I
1, by transmitted light intensity I
1the transmitted light intensity I of the bright rich Beer law of substitution; The electric signal that the second sensor is obtained is converted to liquid stream thickness d, and liquid is flowed to thickness d substitution langbobier law:
I
1=I
0e
-α 1din formula, I
0flow surperficial light intensity for inciding liquid to be measured, there is no the light intensity that in the situation of liquid stream, the second sensor receives; α 1 is liquid flow medium absorption coefficient, reflection liquid stream kind; D is liquid stream thickness;
42) obtain reflecting that liquid flows the liquid flow medium absorption coefficient 1 of kind;
43) electric signal the 3rd sensor being obtained converts scattered light intensity I to
2signal, by scattered light intensity I
2substitution langbobier law, i.e. I
2=I
0e
-α 2din formula, obtain reflecting another liquid flow medium absorption coefficient 2 of impurity concentration, calculate m=α 1/ α 2, search m value and concrete medium kind mapping table, obtain the medium kind of liquid stream, the m value that medium is corresponding is a scope, and oil and the water respectively scope of corresponding m value obtain according to experimental calibration.
Analog amplify circuit as shown in Figure 2, selects OPA690 as amplifier, and A/D modular converter as shown in Figure 3, is selected ADC0809 chip, and single-chip microcomputer is selected 8XX51 series.Detect cabin and vertically place, liquid to be detected is by flowing in upper pipe 1, during through dilatation pipe 2, the first sensor of configuration is measured liquid stream thickness, by first sensor transmitting terminal 3 utilizing emitted light signals, first sensor receiving end 9 receiving optical signals, the thickness of the electric signal obtaining reflection liquid stream; The second sensor is distinguished detected medium, infrared transmitting tube 4 by the second sensor sends infrared signal, the infrared receiving tube 8 of the second sensor receives signal, and due to oil and the difference of the degree of absorption of water to light, electric number of the output of the second sensor is not identical yet; The 3rd sensor is determined the impurity concentration in liquid stream, by the 3rd sensor emission end 7 utilizing emitted light signals, via the 3rd sensor receiving end 5 receiving optical signals after the reflection of liquid stream, utilizes photoelectricity scattering method to draw impurity concentration.Detected medium is flowed out by lower pipe 6 afterwards.Sensor assembly San road output electrical signals amplifies via the analog amplify circuit of Fig. 2, is converted into digital signal at the A/D change-over circuit through Fig. 3.Single-chip microcomputer obtains characterizing the α 1 of liquid stream kind and the α 2 of reaction impurities concentration by langbobier law, by the ratio range of the ratio of the two and the good representative oil of experimental calibration and represent the ratio range comparison of water, determines the composition of liquid to be detected.
Below announced the present invention with preferred embodiment, so it is not intended to limiting the invention, and all technical schemes of taking the scheme that is equal to replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.
Claims (7)
1. a profit pick-up unit, it is characterized in that: comprise test chamber, test chamber is vertically placed, described test chamber comprises pipe, dilatation pipe and lower pipe from top to bottom successively, sensor assembly embeds in the two side of dilatation pipe, described sensor assembly is connected with amplifying circuit, and amplifying circuit connects A/D converter, and A/D converter is connected with single-chip microcomputer.
2. profit pick-up unit according to claim 1, is characterized in that: described sensor assembly comprises: first sensor, for detection of liquid stream thickness; The second sensor, for detection of liquid stream kind; The 3rd sensor, for detection of impurity concentration in liquid stream.
3. profit pick-up unit according to claim 1, is characterized in that: dilatation pipe inner space is air or anti-explosion gas.
4. profit pick-up unit according to claim 1, is characterized in that: described first sensor is correlation imaging electric transducer, first sensor output electrical signals, and electric signal and the liquid of output to flow thickness d linear.
5. profit pick-up unit according to claim 1, is characterized in that: described the second sensor is photoelectric sensor, sonac or capacitive transducer, the second sensor output electrical signals and transmitted light intensity I
1linear.
6. profit pick-up unit according to claim 1, is characterized in that: described the 3rd sensor is photoelectric sensor, the 3rd sensor output electrical signals and scattered light intensity I
2linear.
7. the detection method of profit pick-up unit, is characterized in that, comprises the following steps:
1) test chamber is vertically placed, and inject liquid to be detected;
2) when liquid to be detected is stablized by test chamber, sensor assembly detects the electric signal obtaining, first sensor obtains the electric signal of the thickness of liquid stream to be detected, the second sensor obtains the electric signal of the composition of liquid to be detected, the 3rd sensor obtains the impurity concentration electric signal of liquid to be detected, and sensor assembly is exported corresponding three road electric signal according to testing result;
3) sensor assembly output San road electric signal amplifies through analog amplify circuit, is converting digital signal to via A/D change-over circuit;
4) digital signal of acquisition is first carried out medium filtering by single-chip microcomputer, then carry out following data processing:
41) electric signal the second sensor being obtained is converted to transmitted light intensity I
1, by transmitted light intensity I
1the transmitted light intensity I of the bright rich Beer law of substitution; The electric signal that first sensor is obtained is converted to liquid stream thickness d, and liquid is flowed to thickness d substitution langbobier law:
I
1=I
0e
-α 1din formula, I
0flow surperficial light intensity for inciding liquid to be measured, there is no the light intensity that in the situation of liquid stream, the second sensor receives; α 1 is liquid flow medium absorption coefficient, reflection liquid stream kind; D is liquid stream thickness;
42) obtain reflecting that liquid flows the liquid flow medium absorption coefficient 1 of kind;
43) electric signal the 3rd sensor being obtained converts scattered light intensity I to
2signal, by scattered light intensity I
2substitution langbobier law, i.e. I
2=I
0e
-α 2din formula, obtain reflecting another liquid flow medium absorption coefficient 2 of impurity concentration, calculate m=α 1/ α 2, search m value and concrete medium kind mapping table, obtain the medium kind that liquid flows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388819.XA CN104121965A (en) | 2014-08-08 | 2014-08-08 | Oily water detection device and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388819.XA CN104121965A (en) | 2014-08-08 | 2014-08-08 | Oily water detection device and detection method thereof |
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|---|---|
| CN104121965A true CN104121965A (en) | 2014-10-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238420A (en) * | 2016-03-28 | 2017-10-10 | 大日科技股份有限公司 | Photoelectricity is to angie type material detection device |
| CN109791067A (en) * | 2016-07-08 | 2019-05-21 | 豪夫迈·罗氏有限公司 | For the device for the treatment of of laboratory sample, laboratory automation system and for the method to laboratory sample progress liquid relief |
| CN110646059A (en) * | 2019-09-30 | 2020-01-03 | 深圳和而泰小家电智能科技有限公司 | Liquid level detection method and device |
| CN111735771A (en) * | 2020-05-06 | 2020-10-02 | 合肥新汇成微电子有限公司 | Device for preventing Coating liquid from being uncoated |
-
2014
- 2014-08-08 CN CN201410388819.XA patent/CN104121965A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 宋大鹏等: "基于红外光纤多液层检测系统的研究与设计", 《计算机测量与控制》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238420A (en) * | 2016-03-28 | 2017-10-10 | 大日科技股份有限公司 | Photoelectricity is to angie type material detection device |
| CN109791067A (en) * | 2016-07-08 | 2019-05-21 | 豪夫迈·罗氏有限公司 | For the device for the treatment of of laboratory sample, laboratory automation system and for the method to laboratory sample progress liquid relief |
| CN109791067B (en) * | 2016-07-08 | 2021-09-07 | 豪夫迈·罗氏有限公司 | Device for processing laboratory samples, laboratory automation system and method for pipetting laboratory samples |
| US11125601B2 (en) | 2016-07-08 | 2021-09-21 | Roche Diagnostics Operations, Inc. | Laboratory automation system including improved processing of a laboratory sample by optical and tip position sensing |
| CN110646059A (en) * | 2019-09-30 | 2020-01-03 | 深圳和而泰小家电智能科技有限公司 | Liquid level detection method and device |
| CN110646059B (en) * | 2019-09-30 | 2021-05-25 | 深圳和而泰小家电智能科技有限公司 | Liquid level detection method and device |
| CN111735771A (en) * | 2020-05-06 | 2020-10-02 | 合肥新汇成微电子有限公司 | Device for preventing Coating liquid from being uncoated |
| CN111735771B (en) * | 2020-05-06 | 2024-07-23 | 合肥新汇成微电子股份有限公司 | Coating liquid non-Coating prevention device |
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Application publication date: 20141029 |
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