CN109632588B - Device and method for detecting pollution of oil particulate matters - Google Patents
Device and method for detecting pollution of oil particulate matters Download PDFInfo
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- CN109632588B CN109632588B CN201811649294.5A CN201811649294A CN109632588B CN 109632588 B CN109632588 B CN 109632588B CN 201811649294 A CN201811649294 A CN 201811649294A CN 109632588 B CN109632588 B CN 109632588B
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- detection
- flow cell
- particulate matters
- oil
- detection unit
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- 238000000034 method Methods 0.000 title claims description 17
- 238000001514 detection method Methods 0.000 claims abstract description 122
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 239000013618 particulate matter Substances 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims description 27
- 238000001228 spectrum Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000008277 atmospheric particulate matter Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
-
- G01N15/075—
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
- G01N2015/0238—Single particle scatter
-
- G01N2015/1022—
Abstract
The invention discloses an oil particulate matter pollution detection device, which comprises a flow cell, a liquid inlet pipe, a liquid outlet tank, a first detection point, a second detection point, a first detection unit, a second detection unit and a photoelectric detection circuit.
Description
Technical Field
The invention relates to the field of oil particulate matter detection, in particular to an oil particulate matter pollution detection device and method.
Background
Oil such as hydraulic oil and lubricating oil has wide application in the fields of machinery, electric power, national defense, aircraft and the like. During the operation of the system, due to mutual friction among various components, a plurality of particles are generated, and after the particles enter oil, the performance of the whole system is adversely affected. Therefore, the pollution degree of particles in the oil liquid needs to be detected. When the particulate matter concentration in the oil is found to exceed the standard, clean filtration of the oil or replacement of new clean oil is required. In addition, the particulate matters in the oil liquid are monitored, and whether the running condition of the system is normal can be judged according to the information of the particulate matters. For example, when the concentration of the particulate matter in the oil is found to be changed drastically, it may be determined that the mechanical movement device of the system is likely to be abnormal. The components of the particulate matters are analyzed, so that the component of the system, which causes the particulate matters in the oil liquid, can be known, and the place where the problem occurs can be found out more accurately.
The particle concentration detection can be used for solving the particle size and concentration distribution in the oil by using an oil particle counter. Component detection of particulate matter is mainly a method using iron spectrum and spectrum. The concentration detection of the particulate matter and the component detection of the particulate matter need to be measured by two different instruments respectively. For component detection of particulate matters, no matter how the iron spectrum and the spectrum are, the particulate matters in the oil liquid are filtered and sampled, the particulate matters are enriched on filter paper, and then the particulate matters are measured off-line. The detection efficiency is low, and the detection process is complex; and only the total composition information of the particulate matters can be obtained, but the composition information of the single particulate matters cannot be obtained.
Disclosure of Invention
The invention aims to provide a detection device and a detection method capable of detecting the concentration, the diameter and the components of particulate matters in oil.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides an fluid particulate matter pollutes detection device, includes straight tubular flow cell, connect the feed liquor pipe of the first tip of flow cell, set up the play liquid pool of the second tip below of flow cell, set up the first check point in the flow cell, set up the second tip outer end of flow cell outside is close to the second check point that the flow cell set up, be used for detecting the first check point the particulate matter concentration and the first detection element of diameter, be used for detecting the second check point the second detection element of particulate matter composition, and connect first detection element with the photoelectric detection circuit of second detection element, the photoelectric detection circuit is according to the velocity of liquid in the flow cell calculates the particulate matter is from first check point to the time T that the second check point needs, the second detection element detects after the first detection element detects the particulate matter the time T.
Preferably, the second detection point is located on a central axis extension of the flow cell.
Preferably, the first detection unit includes a first light source, a first condensing lens group condensing the detection light emitted from the first light source to the first detection point, and a photodetector collecting the detection light after passing through the first detection point.
Further preferably, the first light source is a laser of continuous optical power.
Further preferably, the particles are irradiated by the detection light when passing through the first detection point, and the particles scatter and block the detection light, so that the light intensity received by the photodetector becomes smaller, and the photodetector generates a negative pulse signal with a pulse amplitude proportional to the diameter of the particles.
Further preferably, the photoelectric detection circuit sends a detection signal to the second detection unit after receiving the negative pulse signal, and the second detection unit starts detection after delaying the detection signal by the time T.
Preferably, the second detection unit includes a second light source, a second condensing lens group condensing detection light emitted from the second light source to the second detection point, a detection lens group collecting a spectrum of radiation passing through the second detection point, and a spectrometer.
Further preferably, the second light source includes a pulse laser and a pulse laser trigger for triggering the pulse laser to emit pulse laser, and the photoelectric detection circuit is connected with the first detection unit and the pulse laser trigger.
The oil particulate matter pollution detection method adopts the atmospheric particulate matter detection device to detect the concentration, the diameter and the components of the atmospheric particulate matters.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
because the invention adopts the first detection unit to detect the concentration and the diameter of the particulate matters in the oil liquid in the flow cell, and the particulate matters still remain columnar within a certain range due to the action of inertia after the oil liquid leaves the flow cell, when the first detection unit detects the particulate matters on the first monitoring point, the particulate matters move to the first detection point outside the flow cell after the time T passes, and the second detection unit is used for detecting the particulate matters to carry out spectral analysis and determine the components of the particulate matters.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the above figures: 1. a flow cell; 2. a liquid inlet pipe; 3. discharging the liquid pool; 41. a first detection point; 42. a second detection point; 51. a continuous optical power laser; 52. a first converging lens group; 53. a photodetector; 6. a photoelectric detection circuit; 71. a pulsed laser; 72. a pulsed laser trigger; 73. a second converging lens group; 74. a detection lens group; 75. and a spectrometer.
Detailed Description
The invention is further described below with reference to an embodiment shown in the drawings in which:
referring to fig. 1, an apparatus for detecting pollution of particulate matters in oil liquid comprises a straight tubular flow cell 1, a liquid inlet pipe 2 connected with a first end of the flow cell 1, a liquid outlet cell 3 arranged below a second end of the flow cell 1, a first detection point 41 arranged in the flow cell 1, a second detection point 42 arranged outside the flow cell 1 and close to the flow cell 1 at a second end, a first detection unit for detecting concentration and diameter of particulate matters in the first detection point 41, a second detection unit for detecting components of particulate matters in the second detection point 42, and a photoelectric detection circuit 6 connected with the first detection unit and the second detection unit. Specifically, the second detection point 42 is located on the central axis extension of the flow cell 1, after the liquid leaves the flow cell 1, a concentrated beam of liquid is maintained due to the effect of inertia, and then falls into the liquid outlet cell 3 below, at this time, the liquid is not blocked by the flow cell 1, and the second detection unit can be used to detect the impurity type therein.
The photoelectric detection circuit 6 calculates a time T required for the particulate matter to move from the first detection point 41 to the second detection point 42 according to the flow rate of the liquid in the flow cell 1, and the second detection unit detects the particulate matter after the first detection unit detects the time T. At this time, the particulate matter in the liquid detected by the second detecting unit is the particulate matter in the liquid at the first detecting position before the time T. From this, the concentration, diameter and composition of the particulate matter can be determined.
Specifically, the first detection unit includes a continuous light power laser 51, a first condensing lens group 52, and a photodetector 53.
The laser light is emitted by the continuous light power laser, and the laser light is converged to the first detection point 41 by the first convergence lens group 52, so that when particles in the oil liquid enter the flow cell 1 through the liquid inlet pipe 2, part of light is blocked and scattered by the particles when the particles pass through the first detection point 41, and the light intensity reaching the photoelectric detector 53 becomes small. The photodetector circuit 6 amplifies and processes the weak signal output from the photodetector 53 to obtain a negative pulse signal. The pulse signal amplitude is proportional to the size of the particulate matter. The number of the pulses is counted to obtain the particle number of the oil liquid sample, and the particle size can be obtained according to the amplitude of the pulse signals, so that the particle size and the particle concentration in the oil liquid are detected.
The second detection unit includes a pulse laser 71, a pulse laser trigger 72, a second converging lens group 73, a detection lens group 74, and a spectrometer 75, and the photodetector 53 and the pulse laser trigger 72 are connected by the photodetector circuit 6.
The pulse signal generated when the particles in the oil liquid pass through the first detection point 41 in the flow cell 1 is transmitted to the pulse laser trigger 72 by the photoelectric detection circuit 6, after the pulse laser trigger 72 receives the trigger signal, the pulse laser 71 is triggered to emit light after the delay time T, so that the pulse laser 71 emits high-energy pulse laser, and the high-energy pulse laser is converged into a fine light spot at the second detection point 42 by the second convergence lens group 73. The particulate matter in the oil liquid detected by the first detecting unit moves to the second detecting point 42 after the time T passes, and is just irradiated by the high-energy pulse laser emitted by the pulse laser 71, so that the particulate matter is excited and ionized, and a radiation spectrum is generated. The radiation spectrum is collected by the detection lens group 74 to the spectrometer 75, and the wavelength of the radiation spectrum is read out by the spectrometer 75, thereby obtaining the component information of the particulate matter. Since the particle size of the particles is already known in the detection zone 5, the particle size and the particle composition can be determined simultaneously by the device.
Through counting and counting the particulate matters, the diameter, concentration and component information of the particulate matters in the oil liquid sample pool to be detected can be detected at the same time by using the device of the embodiment.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (7)
1. A method for detecting pollution of oil particulate matters is characterized by comprising the following steps: detecting the concentration, diameter and composition of the oil particles by adopting an oil particle detection device;
the oil particulate matter pollution detection device comprises a straight tubular flow cell, a liquid inlet pipe connected with a first end part of the flow cell, a liquid outlet pool arranged below a second end part of the flow cell, a first detection point arranged in the flow cell, a second detection point arranged outside the flow cell and close to the flow cell, a first detection unit for detecting the concentration and the diameter of particulate matters of the first detection point, a second detection unit for detecting the components of the particulate matters of the second detection point, and a photoelectric detection circuit connected with the first detection unit and the second detection unit, wherein the photoelectric detection circuit calculates the time T required for the particulate matters to move from the first detection point to the second detection point according to the flow rate of liquid in the flow cell, and the second detection unit detects the time T of the particulate matters detected by the first detection unit;
the second detection point is positioned on the central axis extension line of the flow cell.
2. The method for detecting pollution of oil particulate matters according to claim 1, wherein the method comprises the following steps: the first detection unit comprises a first light source, a first converging lens group and a photoelectric detector, wherein the first converging lens group converges detection light emitted by the first light source to the first detection point, and the photoelectric detector collects the detection light after passing through the first detection point.
3. The method for detecting pollution of oil particulate matters according to claim 2, wherein the method comprises the following steps: the first light source is a laser of continuous optical power.
4. The method for detecting pollution of oil particulate matters according to claim 2, wherein the method comprises the following steps: when the particles pass through the first detection point, the particles are irradiated by detection light, and the particles scatter and block the detection light, so that the light intensity received by the photoelectric detector is reduced, and the photoelectric detector generates a negative pulse signal with the pulse amplitude being in direct proportion to the diameter of the particles.
5. The method for detecting pollution of oil particulate matter according to claim 4, wherein: the photoelectric detection circuit sends a detection signal to the second detection unit after receiving the negative pulse signal, and the second detection unit starts detection after delaying the time T after receiving the detection signal.
6. The method for detecting pollution of oil particulate matters according to claim 1, wherein the method comprises the following steps: the second detection unit comprises a second light source, a second converging lens group for converging detection light emitted by the second light source to the second detection point, a detection lens group for collecting the radiation spectrum passing through the second detection point and a spectrometer.
7. The method for detecting pollution of oil particulate matter according to claim 6, wherein: the second light source comprises a pulse laser and a pulse laser trigger for triggering the pulse laser to emit pulse laser, and the photoelectric detection circuit is connected with the first detection unit and the pulse laser trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811649294.5A CN109632588B (en) | 2018-12-30 | 2018-12-30 | Device and method for detecting pollution of oil particulate matters |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811649294.5A CN109632588B (en) | 2018-12-30 | 2018-12-30 | Device and method for detecting pollution of oil particulate matters |
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| CN109632588A CN109632588A (en) | 2019-04-16 |
| CN109632588B true CN109632588B (en) | 2024-03-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112303060A (en) * | 2020-09-22 | 2021-02-02 | 河北雷萨重型工程机械有限责任公司 | Hydraulic oil detection system and hydraulic system |
| CN114459965A (en) * | 2021-12-30 | 2022-05-10 | 中船重工安谱（湖北）仪器有限公司 | Aerosol monitoring system and method |
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