CN102680368B - On-line oil particle sensor based on inductance measurement - Google Patents
On-line oil particle sensor based on inductance measurement Download PDFInfo
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- CN102680368B CN102680368B CN201210167540.XA CN201210167540A CN102680368B CN 102680368 B CN102680368 B CN 102680368B CN 201210167540 A CN201210167540 A CN 201210167540A CN 102680368 B CN102680368 B CN 102680368B
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- 238000005259 measurement Methods 0.000 title abstract description 17
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- 238000012360 testing method Methods 0.000 claims description 58
- 239000012530 fluid Substances 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 claims description 3
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- 238000003199 nucleic acid amplification method Methods 0.000 abstract 4
- 239000002923 metal particle Substances 0.000 abstract 3
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- 238000012544 monitoring process Methods 0.000 description 10
- 239000013528 metallic particle Substances 0.000 description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 239000003082 abrasive agent Substances 0.000 description 1
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Abstract
The invention discloses an on-line oil particle sensor based on inductance measurement. The on-line oil particle sensor comprises a sensor main body and a sensor measurement circuit arranged in the sensor main body, wherein the sensor measurement circuit comprises three parts, namely a voltage-stabilized power source part, a high frequency measurement part and a two-stage amplification part; the voltage-stabilized power source outputs 12 V and accesses to the high frequency measurement part and the second-stage operation amplifier power supply end of the two-stage amplification part; the voltage-stabilized power source outputs 5 V and accesses to the first-stage operation amplifier power supply end of the two-stage amplification part; and the high frequency measurement part outputs a signal and accesses to the signal input end of the two-stage amplification part. The high frequency measurement part generates high-frequency oscillations; when metal particles in oil flow through the measurement coil, the inductance of the measurement coil is increased, the oscillation frequency of the high frequency measurement circuit is reduced and the current of the oscillation circuit is increased; and when metal particles flow through the measurement coil, the high frequency measurement part returns to the original fixed-amplitude oscillation state. The on-line oil particle sensor can continuously monitor the distribution and generated velocity of metal particles of 10 micro in grain size on line, does not need cleaning, and avoids the internal accumulation of particles.
Description
Technical field
The present invention relates to online oil liquid monitoring field, particularly a kind of continuous coverage wear particle quantity, Size Distribution, particle produce the online fluid particle sensor of speed.
Background technology
Wearing and tearing are important indicators of reflection Tribological Systems running status, have determined to a great extent health status and the military service performance of machine, for this reason, have become the important content of machinery and equipment health status monitoring.
Canadian National Research Council (National Research Council) research shows that the wearing and tearing of being induced by particle account for 82% of wear-out failure, include three classes such as fatigue, abrasive material and corrosion, and the wearing and tearing of non-particulate induction have adhesion, fine motion and other wearing and tearing, but only account for 18%.Hence one can see that, and particle is not only the main cause of wearing and tearing, is also an important indicator of reflection equipment attrition state.Thereby abrasive particle quantity, Size Distribution, geometric shape become a kind of the most effective method of monitoring Tribological Systems state of wear in on-line continuous monitoring fluid, and realize diagnosis and the military service performance evaluation of machine health status with this.
The online fluid particle sensor of widespread use at present mainly contains two classes:
One class is the online particle collector of fluid taking the HIAC PM4000 series of products of Pacific Ocean scientific instrument company of the U.S. as representative, for the granularity of the various hydraulic and lubricating systems of Real-Time Monitoring, the I of measurable Abrasive Particle Size reaches 4 μ m, but its measurement result output form is the abrasive particle number in abrasive particle certain size interval, its grit size interval division is subject to the precision of instrument itself and the restriction of port number, typical channel number is four, and therefore the shortcoming of sensors with auxiliary electrode were is that the accurate dimension that can not export abrasive particle in fluid distributes.
Another kind of is online fluid particle sensor taking the MetalSACN of Canadian GasTOP company as representative.It is simple and reliable for structure, has been widely used at present pipeline road, marine vessel industry, and power generation industries and related industries field have been proved to be testing tool effectively and reliably.But its measurement range only limits to large abrasive particle, measurable minimum metal abrasive particle is 100 μ m, and minimum nonmetal abrasive particle is 405 μ m; And its measuring accuracy is subject to the successional impact of abrasive particle.
In typical case, gear case gear pair normal wear grit size is at length direction lower than 15 μ m, and major part is below 2 μ m; The size of overload wear abrasive particle depends on overload degree, can reach 1mm at length direction, and initial stage overload produces 150 μ m or slightly little abrasive particle.The grit size scope of wearing and tearing of overrunning is below 150 μ m; Fatigue wear grit size can reach 150 μ m at length direction, and the large abrasive particle that is greater than 15 μ m mainly drops in 15 ~ 25 μ m scopes.Gear case rolling bearing normal wear stratiform grit size is 10 ~ 30 μ m in the longitudinal direction; The sheet grit size that fatigue wear produces, below 150 μ m, drops in the scope of 15 ~ 20 μ m mostly.Gear case sliding contact normal wear, overload wear abrasive particle feature and gear wear abrasive particle feature class are seemingly; The wear debris size of overrunning depends on the degree of overrunning, and on length direction, can reach 1mm.Above-mentioned referring to " Hu Yuanzhe, the recognition feature of gear case abrasive particle on iron spectrum sheet. lubricated and sealing, 2006 (3): 148-150 page. "
Hence one can see that, and the normal wear grit size of most of pair of friction components is generally below 10 μ m, and the above abrasive particle of 10 μ m has been forgiven the sufficient state of wear information of Tribological Systems.Above-mentioned two class sensors or cannot realize the measurement of single grit size, or cannot measure near the little abrasive particle 10 μ m.Can therefore, fast, accurately monitor 10 μ m and above abrasive particle in fluid, the monitoring of the state of wear to pair of friction components be most important.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the object of the present invention is to provide a kind of online fluid particle sensor of measuring based on inductance value, can effectively detect the metallic particles of minimum 10 μ m in fluid, for online wear condition monitoring provides effective technological means, there is simple in structure, reliable feature.
In order to achieve the above object, technical scheme of the present invention is achieved in that
An online fluid particle sensor of measuring based on inductance value, comprises sensor main body and sensor test circuit is therein installed;
Sensor main body comprises base plate 1, left joint 2, shell 3, insulation oil pipe 4, test coil 6, right connector 7, test circuit 9, left joint 2, right connector 7, test circuit 9 is threaded connection respectively and is fixed on base plate 1, insulation oil pipe 4 is adhered on left joint 2 and right connector 7 by transition fit two ends, left joint 2 with on right connector 7, be respectively equipped with standard thread hole 8 for being connected rapid-acting coupling, on shell 3, have a circular hole 5, be used for drawing sensor internal power lead and signal wire, test coil 6 for enameled wire on insulation oil pipe 4 in the direction of the clock spiral winding 2.5 enclose, test coil 6 two ends are respectively welded to capacitor C 4 two ends of test circuit 9,
Sensor test circuit comprises that stabilized voltage supply, high-frequency test and two-stage amplify three parts, stabilized voltage supply input termination direct current 24V power supply, the second level operational amplifier power end that stabilized voltage supply output 12V access high-frequency test part and two-stage are amplified; Stabilized voltage supply output 5V connects the first order operational amplifier power end of two-stage amplifier section, and high-frequency test output signal connects two-stage amplifying signal input end.
Described stabilized voltage supply part comprises diode D1, resistance R 1, capacitor C 1, capacitor C 2, capacitor C 3, three-terminal voltage-stabilizing pipe U1, three-terminal voltage-stabilizing pipe U2, diode D1 positive pole meets 24V D.C. regulated power supply VCC, one end of negative pole connecting resistance R1, the input end of resistance R 1 another termination three-terminal voltage-stabilizing pipe U1 and three-terminal voltage-stabilizing pipe U2, capacitor C 1 is connected to input end and the ground of three-terminal voltage-stabilizing pipe U2, capacitor C 2 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U1, and capacitor C 3 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U2.
Described high-frequency test part comprises: resistance R 2, resistance R 3, resistance R 4, resistance R 5, inductance L 1, inductance L 2, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, triode Q1, inductance L 2 is test coil 6, the two ends of the corresponding test coil of two terminals of inductance L 2, capacitor C 4 composes in parallel frequency selection network with inductance L 2, by the collector of a termination triode Q1 after parallel connection, another termination inductance L 1, its effect is high frequency choke, between the other end of inductance L 1 and the base stage of triode and connecting resistance R2, node between capacitor C 5 one termination inductance L 1 and capacitor C 4, the base stage of another termination triode Q1, resistance R 4 one end ground connection, the emitter of another termination triode Q1, the base stage of capacitor C 6 one termination triodes, other end ground connection, resistance R 3 one end ground connection, the base stage of another termination triode Q1, capacitor C 7 is connected to resistance R 4 two ends, capacitor C 8 is attempted by capacitor C 7 two ends after connecting with resistance R 5, wherein capacitor C 8 one end ground connection, output signal is taken from capacitor C 8 both end voltage.
Described two-stage amplifier section comprises operational amplifier U3A, operational amplifier U4A, capacitor C 9, capacitor C 10, capacitor C 11, resistance R 6, electric capacity R7, electric capacity R8, electric capacity R9, electric capacity R10, electric capacity R11, electric capacity R12, capacitor C 9 one termination high-frequency test part output signals, another termination operational amplifier U3A in-phase input end, connecting resistance R6 between operational amplifier U3A in-phase input end and ground, connecting resistance R7 between inverting input and ground, between inverting input and output terminal, connect capacitor C 10, capacitor C 10 two ends connecting resistance R8, between the in-phase input end of the output terminal of operational amplifier U3A and operational amplifier U4A, connect capacitor C 11, connecting resistance R9 between the in-phase input end of operational amplifier U4A and ground, connecting resistance R10 between the inverting input of operational amplifier U4A and ground, connecting resistance R11 between the inverting input of operational amplifier U4A and output terminal, operational amplifier output terminal connecting resistance R12, signal is from resistance R 12 other end outputs.
The present invention, compared with existing fluid particle sensor, has following advantage:
1, the accurate dimension of simple and reliable for structure, small size, micrometeor on-line continuous monitoring metallic particles distributes and particle produces speed.
2, test coil insulation oil pipe in the direction of the clock spiral winding 2.5 enclose, it can measure minimum metal grain diameter is 10 μ m.
3, do not need to clean, sensor internal is difficult for packed particle.
Brief description of the drawings
Fig. 1 is main body cut-open view of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is stabilized voltage supply part connection diagram of the present invention;
Fig. 4 is high-frequency test part connection diagram of the present invention;
Fig. 5 is two-stage amplifier section connection diagram of the present invention;
Fig. 6 is the typical abrasive particle signal that the present invention is based on the online fluid particle sensor of inductance value measurement.
Embodiment
Below in conjunction with accompanying drawing, structural principle of the present invention and principle of work are described in detail.
An online fluid particle sensor of measuring based on inductance value, comprises sensor main body and sensor test circuit is therein installed;
With reference to Fig. 1, sensor main body comprises base plate 1, left joint 2, shell 3, insulation oil pipe 4, test coil 6, right connector 7, test circuit 9, left joint 2, right connector 7, test circuit 9 is threaded connection respectively and is fixed on base plate 1, insulation oil pipe 4 is adhered on left joint 2 and right connector 7 by transition fit two ends, left joint 2 with on right connector 7, be respectively equipped with standard thread hole for being connected rapid-acting coupling, shell 3 is threaded connection and is fixed on base plate 1, on shell 3, have a circular hole 5, be used for drawing sensor internal power lead and signal wire, test coil 6 for enameled wire on insulation oil pipe 4 in the direction of the clock spiral winding 2.5 enclose, test coil 6 two ends are respectively welded to capacitor C 4 two ends of test circuit 9.
With reference to Fig. 2, shell 3 is threaded connection and is fixed on base plate 1.
Sensor test circuit comprises that stabilized voltage supply, high-frequency test and two-stage amplify three parts, stabilized voltage supply input termination direct current 24V power supply, the second level operational amplifier power end that stabilized voltage supply output 12V access high-frequency test part and two-stage are amplified; Stabilized voltage supply output 5V connects the first order operational amplifier power end of two-stage amplifier section, and high-frequency test output signal connects two-stage amplifying signal input end.
With reference to Fig. 3, described stabilized voltage supply part comprises diode D1, resistance R 1, capacitor C 1, capacitor C 2, capacitor C 3, three-terminal voltage-stabilizing pipe U1, three-terminal voltage-stabilizing pipe U2, diode D1 positive pole meets 24V D.C. regulated power supply VCC, one end of negative pole connecting resistance R1, the input end of resistance R 1 another termination three-terminal voltage-stabilizing pipe U1 and three-terminal voltage-stabilizing pipe U2, capacitor C 1 is connected to input end and the ground of three-terminal voltage-stabilizing pipe U2, capacitor C 2 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U1, and capacitor C 3 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U2.
With reference to Fig. 4, described high-frequency test part comprises: resistance R 2, resistance R 3, resistance R 4, resistance R 5, inductance L 1, inductance L 2, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, triode Q1, inductance L 2 is test coil 6, the two ends of the corresponding test coil of two terminals of inductance L 2, capacitor C 4 composes in parallel frequency selection network with inductance L 2, by the collector of a termination triode Q1 after parallel connection, another termination inductance L 1, its effect is high frequency choke, between the other end of inductance L 1 and the base stage of triode and connecting resistance R2, node between capacitor C 5 one termination inductance L 1 and capacitor C 4, the base stage of another termination triode Q1, resistance R 4 one end ground connection, the emitter of another termination triode Q1, the base stage of capacitor C 6 one termination triodes, other end ground connection, resistance R 3 one end ground connection, the base stage of another termination triode Q1, capacitor C 7 is connected to resistance R 4 two ends, capacitor C 8 is attempted by capacitor C 7 two ends after connecting with resistance R 5, wherein capacitor C 8 one end ground connection, output signal is taken from capacitor C 8 both end voltage.
With reference to Fig. 5, described two-stage amplifier section comprises operational amplifier U3A, operational amplifier U4A, capacitor C 9, capacitor C 10, capacitor C 11, resistance R 6, electric capacity R7, electric capacity R8, electric capacity R9, electric capacity R10, electric capacity R11, electric capacity R12, capacitor C 9 one termination high-frequency test part output signals, another termination operational amplifier U3A in-phase input end, connecting resistance R6 between operational amplifier U3A in-phase input end and ground, connecting resistance R7 between inverting input and ground, between inverting input and output terminal, connect capacitor C 10, capacitor C 10 two ends connecting resistance R8, between the in-phase input end of the output terminal of operational amplifier U3A and operational amplifier U4A, connect capacitor C 11, connecting resistance R9 between the in-phase input end of operational amplifier U4A and ground, connecting resistance R10 between the inverting input of operational amplifier U4A and ground, connecting resistance R11 between the inverting input of operational amplifier U4A and output terminal, operational amplifier output terminal connecting resistance R12, signal is from resistance R 12 other end outputs.
Principle of work of the present invention: sensor access 24V direct supply, sensor test circuit voltage stabilizing part output 12V and 5V provide energy for high-frequency test and two-stage amplifier section, high-frequency test part produces the higher-order of oscillation, in the time that the metallic particles in fluid is flowed through test coil, make the quantitative change of test coil inductance large, high-frequency test circuit oscillation frequency diminishes, and it is large that oscillation circuit electric current becomes, when metallic particles flows through test coil, high-frequency test part comes back to original fixed ampllitude oscillatory regime.Therefore, when there being abrasive Flow out-of-date in fluid, high-frequency test part output pulse signal, is enlarged into 0-10V through two-stage amplifying circuit, a pulse signal amplitude representative size.
Shown in Fig. 6, typical abrasive particle signal of the present invention, pulse amplitude represents the size of abrasive particle.Typical case's fluid particle on-line monitoring scheme:
1, build auxiliary oil way: provide oil circulation power by micro pump, monitored fluid is introduced into micro pump from fuel tank, then export the left joint 2 of sensor to by micro pump, get back to fuel tank by 6 outputs of sensor right connector.
2, test system building: 24V D.C. regulated power supply is connected to probe power input end, and sensor output terminal is with differential mode access data capture card, and the simulating signal of this sensor output is converted to digital signal input PC by data acquisition.
3, realize on-line testing: gather experimental data, calculate pulse signal amplitude and obtain grain size, record granule content in oil, obtain accurate amounts of particles, particle size distribution and particle and produce speed, realize the continuous on-line monitoring of particle in oil.
Claims (4)
1. an online fluid particle sensor of measuring based on inductance value, comprises sensor main body and sensor test circuit is therein installed, and it is characterized in that:
Sensor main body comprises base plate (1), left joint (2), shell (3), insulation oil pipe (4), test coil (6), right connector (7), left joint (2), right connector (7), sensor test circuit (9) is individually fixed on base plate (1), insulation oil pipe (4) is adhered on left joint (2) and right connector (7) by transition fit two ends, on left joint (2) and right connector (7), be respectively equipped with standard thread hole, on shell (3), have a circular hole (5), be used for drawing sensor internal power lead and signal wire, test coil (6) for enameled wire in insulation oil pipe (4) in the direction of the clock spiral winding 2.5 enclose, test coil (6) two ends are respectively welded to capacitor C 4 two ends of sensor test circuit (9),
Sensor test circuit comprises that stabilized voltage supply, high-frequency test part and two-stage amplify three parts, stabilized voltage supply input termination direct current 24V power supply, the second level operational amplifier power end that stabilized voltage supply output 12V access high-frequency test part and two-stage are amplified; Stabilized voltage supply output 5V connects the first order operational amplifier power end of two-stage amplifier section, and high-frequency test part output signal connects two-stage amplifying signal input end.
2. a kind of online fluid particle sensor of measuring based on inductance value according to claim 1, it is characterized in that: described stabilized voltage supply part comprises diode D1, resistance R 1, capacitor C 1, capacitor C 2, capacitor C 3, three-terminal voltage-stabilizing pipe U1, three-terminal voltage-stabilizing pipe U2, diode D1 positive pole meets 24V D.C. regulated power supply VCC, one end of negative pole connecting resistance R1, the input end of resistance R 1 another termination three-terminal voltage-stabilizing pipe U1 and three-terminal voltage-stabilizing pipe U2, capacitor C 1 is connected to input end and the ground of three-terminal voltage-stabilizing pipe U2, capacitor C 2 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U1, capacitor C 3 is connected to output terminal and the ground of three-terminal voltage-stabilizing pipe U2.
3. a kind of online fluid particle sensor of measuring based on inductance value according to claim 1, it is characterized in that: described high-frequency test part comprises: resistance R 2, resistance R 3, resistance R 4, resistance R 5, inductance L 1, inductance L 2, capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7, capacitor C 8, triode Q1, inductance L 2 is test coil (6), the two ends of the corresponding test coil of two terminals of inductance L 2, capacitor C 4 composes in parallel frequency selection network with inductance L 2, by the collector of a termination triode Q1 after parallel connection, another termination inductance L 1, its effect is high frequency choke, between the base stage of the other end of inductance L 1 and triode Q1 and connecting resistance R2, node between capacitor C 5 one termination inductance L 1 and capacitor C 4, the base stage of another termination triode Q1, resistance R 4 one end ground connection, the emitter of another termination triode Q1, the base stage of capacitor C 6 one termination triode Q1, other end ground connection, resistance R 3 one end ground connection, the base stage of another termination triode Q1, capacitor C 7 is connected to resistance R 4 two ends, capacitor C 8 is attempted by capacitor C 7 two ends after connecting with resistance R 5, wherein capacitor C 8 one end ground connection, output signal is taken from capacitor C 8 both end voltage.
4. a kind of online fluid particle sensor of measuring based on inductance value according to claim 1, is characterized in that: described two-stage amplifier section comprises operational amplifier U3A, operational amplifier U4A, capacitor C 9, capacitor C 10, capacitor C 11, resistance R 6, electric capacity R7, electric capacity R8, electric capacity R9, electric capacity R10, electric capacity R11, electric capacity R12, capacitor C 9 one termination high-frequency test part output signals, another termination operational amplifier U3A in-phase input end, connecting resistance R6 between operational amplifier U3A in-phase input end and ground, connecting resistance R7 between inverting input and ground, between inverting input and output terminal, connect capacitor C 10, capacitor C 10 two ends connecting resistance R8, between the in-phase input end of the output terminal of operational amplifier U3A and operational amplifier U4A, connect capacitor C 11, connecting resistance R9 between the in-phase input end of operational amplifier U4A and ground, connecting resistance R10 between the inverting input of operational amplifier U4A and ground, connecting resistance R11 between the inverting input of operational amplifier U4A and output terminal, operational amplifier U4A output terminal connecting resistance R12, signal is from resistance R 12 other end outputs.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103471969B (en) * | 2013-09-12 | 2016-01-06 | 浙江中欣动力测控技术有限公司 | A kind of appraisal procedure of flowing oil metal particle on-line monitoring sensor performance |
| CN105588873B (en) * | 2016-03-18 | 2019-04-19 | 中国计量学院 | A kind of outer through mode low frequency electromagnetic detection device |
| CN105865987A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Method for monitoring oil by means of full-frequency-band variable-structure filtering, adsorbing and molding |
| CN106018192A (en) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | Double-coil oil monitoring method with wave suppression, separation and molding |
| CN105928844A (en) * | 2016-05-12 | 2016-09-07 | 绍兴文理学院 | Double-coil oil liquid monitoring equipment adopting wave suppression, separation and shaping |
| CN105865984A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Oil monitoring method based on full-band variable-structure working condition adaptive filtering and molding |
| CN106018190A (en) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | Oil monitoring method using full-band working condition adaptive filtering, separation and shaping |
| CN105865986A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Oil monitoring equipment based on full-band variable-structure working condition adaptive filtering and molding |
| CN105891061A (en) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | Liquid oil monitoring device adopting full-band and variable-structure filtering, absorbing and shaping |
| CN109630502B (en) * | 2018-12-28 | 2021-02-12 | 大连海事大学 | Multi-parameter oil comprehensive detection device and manufacturing method thereof |
| CN109738338A (en) * | 2019-02-12 | 2019-05-10 | 重庆邮电大学 | A kind of online metallic particles monitoring device of heavy caliber lubricant passage way and its detection method |
| CN110231396B (en) * | 2019-05-31 | 2021-03-16 | 西安交通大学 | Abrasive particle on-line monitoring sensor based on planar vortex coil penetration measurement |
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| CN2548147Y (en) * | 2002-05-28 | 2003-04-30 | 成都精新粉体测试设备有限公司 | Resistance-type grain-distribution detection instrument |
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