CN203365278U - Transducer for on-line monitoring of metal grains in oil liquid - Google Patents
Transducer for on-line monitoring of metal grains in oil liquid Download PDFInfo
- Publication number
- CN203365278U CN203365278U CN 201320319451 CN201320319451U CN203365278U CN 203365278 U CN203365278 U CN 203365278U CN 201320319451 CN201320319451 CN 201320319451 CN 201320319451 U CN201320319451 U CN 201320319451U CN 203365278 U CN203365278 U CN 203365278U
- Authority
- CN
- China
- Prior art keywords
- transducer
- coil
- monitoring
- oil liquid
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a transducer for on-line monitoring of metal grains in oil liquid. The transducer is a mutual inductance transducer, and comprises an exciting coil and an induction coil, wherein an oil passage through which the oil liquid can pass is arranged in the center of a framework made from a magnetic inert material; the exciting coil and the induction coil are both wound on the framework; the induction coil is located between the exciting coil and the framework; the axial length of the induction coil is 1/4-1/2 of that of the exciting coil; the axial middle points of the induction coil and the exciting coil coincide. The transducer adopts a parallel measuring structure to realize zero compensation and adjustment, and is simple in structure, high in sensitivity, good in degree of linearity and strong in anti-jamming ability; when applied to on-line monitoring of metal grains in oil liquid, the transducer is convenient to operate, good in real-time performance, high in measuring accuracy and accurate and reliable in monitoring result; the transducer can be widely applied to military use and civil use, including oil liquid contamination level, wearing monitoring and failure monitoring and diagnosis for lubricating systems in machine equipment of various airplanes, vessels and automobiles, so that safety accidents are prevented.
Description
Technical field
The utility model relates to mechanical equipment state monitoring, and oil analysis technology wherein specifically, more specifically for the sensor of on-line monitoring fluid metal worn particle.
Background technology
It is modal failure mode that equipment attrition lost efficacy, and the fault of plant equipment more than 70% is relevant with wearing and tearing, and the parameter obtained by the monitoring to fluid and analysis is the lubrication and abrasion state of judgment device well.It is the new technology for the mechanical equipment state monitoring developed rapidly in recent ten years, and especially, at aspects such as engine, gear drive, bearing arrangement, hydraulic systems, this technology has obtained significant benefit, thereby is at home and abroad paid much attention to.In the country of industry prosperity, the oil analysis technology or is becoming one of indispensable method of mechanical equipment state monitoring and fault diagnosis, occupies critical role at present.The oil analysis technology is divided into off-line type and online.Traditional off-line type mainly concentrates on the aspects such as spectral analysis, analyzing iron spectrum, grain count, oil physical and chemical analysis.The analysis principle that online detection system adopts mainly contains electromagnetic method, X-ray energy spectrum, electrostatic method and photoelectric method etc.Compare with online machine oil analysis, compare with online machine oil analysis, off-line type machine oil analysis has very high monitoring accuracy.But lab analysis is time-consuming, and to grow (needing collection, transmission, processing sample and wait analysis result) and testing cost high.And in long analysis time, the variation and cause system failure in the off-line analysis process of the oil quality in machine system.Therefore off-line type exists that workload is large, feature that can not real time reaction fluid, can cause and sentence late erroneous judgement and the high shortcoming of detecting instrument cost.The monitoring plant equipment is the process of a quantitative change to qualitative change from may wear to inefficacy, and the time that this process occurs is unknown, so must at every moment to fluid, carry out on-line monitoring, just can not make the monitoring of fluid be full of contingency.The defect of the deficiency that the fluid on-line monitoring is fine has overcome that traditional laboratory off-line analysis method cost is high, complicated operation, measurement sample point are limited, become the main direction of oil liquid monitoring technical development of new generation.And the fluid on-line monitoring has a lot of disturbing factors, wanting to pinpoint the problems in time just must possess very high monitoring accuracy.
The utility model content
It is a kind of highly sensitive that the purpose of this utility model is to provide, and the linearity is good, the sensor for on-line monitoring fluid metal worn particle that antijamming capability is strong.
Sensor for on-line monitoring fluid metal worn particle of the present utility model is the mutual inductance type inductance sensor, comprise drive coil and inductive coil, in the frame center made from the magnetic-lag material, arranging can be by the oil circuit of fluid, coaxial drive coil and the inductive coil of coiling on skeleton, inductive coil is between drive coil and skeleton, the axial length of inductive coil is 1/4 ~ 1/2 of drive coil axial length, and inductive coil overlaps with the axial midpoint of drive coil.
The utility model application ANSYS software is to the solenoid coil modeling and simulating, utilize numerical analysis method to be studied sensor construction, find the magnetic field distribution situation that the motivating solenoid coil produces, zone line in solenoid coil inside form approximate uniform magnetic field and this regional magnetic field the strongest, and arrive 1/2 of central magnetic field intensity coil magnetic fidle of end strength retrogression, magnetic field intensity from centre along axis to two ends is not uniform, neither linear attenuation, but the arc decay.So the inductive coil of sensor must, in the middle of the coil of drive coil, just make sensor have optimum sensitivity and the linearity.The intermediate approximation in the magnetic field that the length of inductive coil must produce according to the drive coil length in zone is uniformly determined.
For making sensor there is optimum sensitivity, make sensor output there is the good linearity, the optimum value of the axial length of inductive coil should be 1/4 ~ 1/2 of drive coil axial length.
While using sensor of the present utility model to carry out the on-line monitoring of fluid metal worn particle:
A. the drive coil L1 of two identical sensors and L2 access excitation in parallel AC field module fd are realized to zero compensation and adjusting, be connected into alternating current bridge by two inductive coil LS1 and LS2 differential concatenation and with resistance R 1 and the R2 of the resistances such as two, sensor output two ends connect signal condition module, capacitor C and deflection machine R
pbe connected between output terminal of sensor and signal condition module;
B. fluid passes through from the oil circuit of one of them sensor, and the another one sensor does not pass into any material;
C. the output signal of sensor, after signal condition module acquisition process, obtains the relevant parameters of fluid metal worn particle.
For making monitoring result accurate, resistance R 1 is far longer than the equiva lent impedance of inductive coil.
Drive coil L1 and L2 access excitation in parallel AC field module fd, drive coil is transfused to the excitation AC field and produces alternating magnetic field, and inductive coil LS1 and LS2 are due to the induction electromotive force output of the variation generation in magnetic field.The induction electromotive force differential concatenation output that inductive coil LS1 and LS2 produce, and be connected into alternating current bridge output with the very large fixed resistance of two resistances.Capacitor C and deflection machine R
pbalance adjustment for alternating current bridge.Another is obstructed out-of-date by the fluid that contains metal worn particle to contain a brachium pontis of drive coil and inductive coil in sensor, and metal worn particle affects the magnetic field intensity of sensor, destroys the balance of electric bridge, the alternating voltage of inductive coil output respective magnitudes.When the fluid that there is no abrasive particle passes through sensor, the voltage that two induced field coils of sensor produce is identical, and bridge circuit is output as zero.Output voltage size and metal worn particle concentration are directly proportional, and the metal worn particle concentration contained in fluid is larger, and output voltage values is larger.To the output signal acquisition and processing, reach the purpose to fluid metal worn particle concentration on-line monitoring by the signal condition module.Certainly subsequent treatment also comprises some conventional data and the result treatment steps such as A/D conversion and microprocessor processes.
The relationship description of the amplitude of output signal and metal worn particle number is as follows:
The induced electromotive force of two inductive coils
with
be respectively:
In formula,
for exciting current;
for the power supply angular frequency;
for the coefficient of mutual inductance of LS1 to L1;
for LS2 to L2
coefficient of mutual inductance.
Output voltage is:
Before metal worn particle enters sensor, the inductance of generation is:
When
the time,
In formula,
for permeability of vacuum;
the number of turn that means the drive coil coil; R means the internal diameter of magnetic-lag pipe; L means the drive coil axial length.
When a metal worn particle enters sensor, the inductance increment of generation is:
In formula,
for the metal worn particle relative permeability;
for the metal worn particle radius;
for the metal worn particle axial length.
Suppose that abrasive particle is circular, 2
, above formula is reduced to:
When having n abrasive particle to enter sensor, total inductance increment is:
So the rate of change of inductance is:
Therefore, in the situation that sensor physical dimension (r, L) is definite, the relative permeability of metal worn particle
, metal worn particle quantity n larger, inductance value changes greatly, the output voltage signal amplitude is also larger, the quantity n of output signal amplitude and metal worn particle is proportional.
The sensor construction of the utility model on-line monitoring fluid metal worn particle is reasonable, highly sensitive, and the linearity is good, and antijamming capability is strong.By sensor application of the present utility model, in on-line monitoring fluid metal worn particle, method is easy to operate, and real-time is good, and measuring accuracy is high, and monitoring result accurately and reliably.
Sensor of the present utility model, can apply to dual-use field, comprise the monitoring of oil contamination degree and the malfunction monitoring diagnosis of the lubricating system of the plant equipment such as various aircrafts, naval vessel and automobile, avoid because abrasive particle in wearing and tearing or fluid too much can not be found in time and process, and cause mechanical fault.
The accompanying drawing explanation
Fig. 1 cell winding structural drawing.
Fig. 2 sensor measurement schematic diagram.
Embodiment
Further describe the utility model below in conjunction with accompanying drawing and by embodiment.
See Fig. 1.The sensor of on-line monitoring fluid metal worn particle is the mutual inductance type inductance sensor, comprise drive coil and inductive coil, the frame center of making at the magnetic-lag material arranges can be by the oil circuit of fluid, the coaxial drive coil of coiling and inductive coil on skeleton, inductive coil is between drive coil and skeleton, the axial length of inductive coil is 1/3 of drive coil axial length, inductive coil with axial midpoint drive coil, overlap, in the axial direction, the middle part of inductive coil in drive coil.
See Fig. 2.The key step that the use the sensor carries out on-line monitoring fluid metal worn particle is as follows:
A. by the drive coil L1 of two identical sensors and L2 access excitation in parallel AC field module fd, be connected into alternating current bridge by two inductive coil LS1 and LS2 differential concatenation and with resistance R 1 and the R2 of the resistances such as two, sensor output two ends connect signal condition module, capacitor C and potentiometer R
pbe connected between output terminal of sensor and signal condition module;
Resistance R 1 wherein is far longer than the equiva lent impedance of inductive coil.
B. fluid passes through from the oil circuit of one of them sensor, and the another one sensor does not pass into any material;
C. the output signal of sensor, after signal condition module acquisition process, obtains the relevant parameters of fluid metal worn particle in time: as the concentration of metal worn particle in fluid (grain number/liter or mg/litre), the relative permeability of metal worn particle and the particle diameter of metal worn particle.
Subsequent treatment also comprises some conventional data and the result treatment steps such as A/D conversion and microprocessor processes.
Claims (1)
1. for the sensor of on-line monitoring fluid metal worn particle, for mutual inductance sensor, comprise drive coil and inductive coil, it is characterized in that: the frame center of making at the magnetic-lag material arranges can be by the oil circuit of fluid, coaxial drive coil and the inductive coil of coiling on skeleton, inductive coil is between drive coil and skeleton, and the axial length of inductive coil is 1/4 ~ 1/2 of drive coil axial length, and inductive coil overlaps with the axial midpoint of drive coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320319451 CN203365278U (en) | 2013-06-05 | 2013-06-05 | Transducer for on-line monitoring of metal grains in oil liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320319451 CN203365278U (en) | 2013-06-05 | 2013-06-05 | Transducer for on-line monitoring of metal grains in oil liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203365278U true CN203365278U (en) | 2013-12-25 |
Family
ID=49813024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320319451 Withdrawn - After Issue CN203365278U (en) | 2013-06-05 | 2013-06-05 | Transducer for on-line monitoring of metal grains in oil liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203365278U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308431A (en) * | 2013-06-05 | 2013-09-18 | 桂林电子科技大学 | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor |
| CN103454189A (en) * | 2013-09-12 | 2013-12-18 | 浙江中欣动力测控技术有限公司 | Device for evaluating performance of on-line flowing oil metal particle monitoring sensor |
| CN106537113A (en) * | 2014-04-15 | 2017-03-22 | 斯派超科学股份有限公司 | Particle counter and classification system |
| CN109579894A (en) * | 2018-09-20 | 2019-04-05 | 西人马联合测控（泉州）科技有限公司 | A kind of scaling method and system of lubricating oil metal filings sensor |
| CN115372209A (en) * | 2022-07-11 | 2022-11-22 | 苏州仁正智探科技有限公司 | High-sensitivity oil abrasive particle online monitoring system and monitoring method |
| CN117129539A (en) * | 2023-10-26 | 2023-11-28 | 苏州仁正智探科技有限公司 | Compensation coil system and method for induction type oil wear debris sensor |
-
2013
- 2013-06-05 CN CN 201320319451 patent/CN203365278U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308431A (en) * | 2013-06-05 | 2013-09-18 | 桂林电子科技大学 | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor |
| CN103308431B (en) * | 2013-06-05 | 2015-06-03 | 桂林电子科技大学 | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor |
| CN103454189A (en) * | 2013-09-12 | 2013-12-18 | 浙江中欣动力测控技术有限公司 | Device for evaluating performance of on-line flowing oil metal particle monitoring sensor |
| CN103454189B (en) * | 2013-09-12 | 2015-08-05 | 浙江中欣动力测控技术有限公司 | A kind of apparatus for evaluating of flowing oil metal particle on-line monitoring sensor performance |
| CN106537113A (en) * | 2014-04-15 | 2017-03-22 | 斯派超科学股份有限公司 | Particle counter and classification system |
| CN106537113B (en) * | 2014-04-15 | 2020-06-05 | 斯派超科学股份有限公司 | Particle counter and classification system |
| CN109579894A (en) * | 2018-09-20 | 2019-04-05 | 西人马联合测控（泉州）科技有限公司 | A kind of scaling method and system of lubricating oil metal filings sensor |
| US11119026B2 (en) | 2018-09-20 | 2021-09-14 | Fatri United Testing & Control (Quanzhou) Technologies Co., Ltd | Calibration method and system for a lubrication oil metal debris sensor |
| CN115372209A (en) * | 2022-07-11 | 2022-11-22 | 苏州仁正智探科技有限公司 | High-sensitivity oil abrasive particle online monitoring system and monitoring method |
| CN115372209B (en) * | 2022-07-11 | 2023-12-22 | 苏州仁正智探科技有限公司 | High-sensitivity oil abrasive particle online monitoring system and monitoring method |
| CN117129539A (en) * | 2023-10-26 | 2023-11-28 | 苏州仁正智探科技有限公司 | Compensation coil system and method for induction type oil wear debris sensor |
| CN117129539B (en) * | 2023-10-26 | 2023-12-22 | 苏州仁正智探科技有限公司 | Compensation coil system and method for induction type oil wear debris sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103308431B (en) | Sensor for monitoring metal abrasive particles in oil liquid on line and application method for sensor | |
| CN203365278U (en) | Transducer for on-line monitoring of metal grains in oil liquid | |
| CN103344535B (en) | Oil metal abrasive particles online monitoring system | |
| CN102818754B (en) | Method and device of improving online monitoring accuracy of engine oil metal abrasive particles | |
| CN203365280U (en) | On-line monitoring system for metal grains in oil liquid | |
| CN102200528B (en) | On-line detection device for broken wires of wire ropes | |
| CN107340544B (en) | A kind of the minute metallic particle on-line detecting system and method for high sensitivity | |
| CN104697905B (en) | A kind of method for designing and oil liquid abrasive grain detection means of oil liquid abrasive grain detection sensor | |
| CN103558127B (en) | A kind of differential type oil liquid abrasive grain on-line sensor test macro | |
| CN102331389A (en) | High-sensitivity oil abrasive grain on-line monitoring sensor | |
| CN102331390B (en) | Flowing oil metal particle on-line monitoring sensor | |
| CN205620270U (en) | Online fluid metal particles detector | |
| CN109283101A (en) | A kind of high sensitivity wear particle on-line detecting system and method | |
| CN108152361B (en) | Online engine oil metal abrasive particle and temperature integrated monitoring device and method | |
| CN208953411U (en) | A kind of multi-functional mechanical equipment lubrication oil metal worn particle detector | |
| CN104155360B (en) | In-pipeline detector signal excitation and harvester and defect inspection method | |
| CN110208167A (en) | A kind of lubricant oil metal wear particle detection device that can distinguish bubble and detection method | |
| CN113125314A (en) | High-sensitivity metal wear particle detection sensor wrapped with high-permeability material | |
| CN111426614A (en) | Magnetorheological polishing solution iron powder concentration detection device based on mutual inductance method | |
| CN107121489A (en) | A kind of alternating current field measurement instrument | |
| CN201867355U (en) | Online monitoring sensor for flowing oil metal particles | |
| CN112362727A (en) | Steel wire rope on-line monitoring system and method | |
| Li et al. | Online symmetric magnetic excitation monitoring sensor for metal wear debris | |
| Xie et al. | A bridge-type inductance sensor with a two-stage filter circuit for high-precision detection of metal debris in the oil | |
| CN202886236U (en) | Device for improving online monitoring precision of engine oil metal abrasive particle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20150603 |
|
| RGAV | Abandon patent right to avoid regrant |