CN203365280U - On-line monitoring system for metal grains in oil liquid - Google Patents
On-line monitoring system for metal grains in oil liquid Download PDFInfo
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- CN203365280U CN203365280U CN 201320332042 CN201320332042U CN203365280U CN 203365280 U CN203365280 U CN 203365280U CN 201320332042 CN201320332042 CN 201320332042 CN 201320332042 U CN201320332042 U CN 201320332042U CN 203365280 U CN203365280 U CN 203365280U
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Abstract
The utility model discloses an on-line monitoring system for metal grains in oil liquid. The on-line monitoring system comprises transducers, a microprocessor and a circuit, wherein each transducer is a solenoid inductance transducer; an oil passage through which the oil liquid can pass is formed in each solenoid; an AC exciting signal generator is connected with two identical exciting coils of the transducers; the induction coils of the two transducers are connected with a signal amplifier; the signal amplifier is further connected with an RMS-DC convertor, an AD convertor, the microprocessor and a display respectively; the microprocessor further comprises a keyboard and an alarm; the monitoring system has a reasonable structure, has high sensitivity, good degree of linearity, strong anti-jamming performance and stable and reliable work in respect of monitoring of a weak signal sent by an inductance type transducer, and is convenient to operate, good in real-time performance, high in measuring accuracy and accurate and reliable in monitoring result; the on-line monitoring system can be widely applied to military use and civil use, including oil liquid contamination level, and failure monitoring and diagnosis for lubricating systems in machine equipment of various airplanes, vessels and automobiles, so that various engine accidents are prevented.
Description
Technical field
The utility model relates to mechanical equipment state monitoring, specifically oil analysis technology wherein, more specifically fluid metal worn particle on-line monitoring system.
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.With online machine oil analysis, compare, 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.Want accurately to detect the subtle change of oil liquid abrasive grain concentration, little on sensor output impact, be not subject to the impact of work under bad environment, the characteristics such as it is high that monitoring system must possess accuracy of detection, and input impedance is large, and antijamming capability is strong.
The utility model content
Precision and the antijamming capability of the utility model in order to improve online fluid detection method, carry out the metal worn particle concentration change situation in Real-Time Monitoring fluid with system simple in structure, and a kind of fluid metal worn particle on-line monitoring system is provided.
Fluid metal worn particle on-line monitoring system of the present utility model, comprise sensor, microprocessor and circuit, and its sensor is the solenoid type inductance sensor, in its solenoid, is can be by the oil circuit of fluid; The excitation AC signal generator connects the drive coil of two identical sensors, the inductive coil of these two sensors connects signal amplifier, after signal amplifier, be linked in sequence RMS-DC converter, AD converter, microprocessor and display, microprocessor also connects respectively keyboard and alarm.
Described sensor can select structure be specially: the frame center made from the magnetic-lag material arranges can be by the oil circuit of fluid, drive coil and inductive coil coaxially are wound 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 the axial midpoint of inductive coil overlaps with the axial midpoint of drive coil.
The inductive coil of such sensor is in the middle of the coil of drive coil, rational in infrastructure, has optimum sensitivity and the linearity, and antijamming capability is strong.For 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.
While using system of the present utility model to carry out on-line monitoring, at first by the drive coil of two identical sensors access excitation in parallel AC signal generator, by two inductive coil differential concatenations and with the large resistance of the resistances such as two, be connected into alternating current bridge; Then make fluid pass through from the oil circuit of one of them sensor.
Drive coil is transfused to the excitation AC field and produces alternating magnetic field, and inductive coil is due to the induction electromotive force output of the variation generation in magnetic field.The induction electromotive force differential concatenation output that the inductive coil of two sensors produces, and be connected into alternating current bridge output with the very large fixed resistance of two resistances.Another is obstructed out-of-date by the fluid that contains metal worn particle to contain an oil circuit 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.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 system processing module.
In the utility model, integrated transporting discharging U2 and high-speed buffer U3 are linked in sequence after waveform generator U1 in described excitation AC signal generator; Meet a potentiometer RP2 between potentiometer RP1 of serial connection and resistance R 1, the 1 pin and the 8th pin between the 1st pin of waveform generator U1 and the 10th pin, connect a concussion capacitor C 1 between the 5th pin and ground.
Particularly, waveform generator U1 selects MAX038, and also available other waveform generator replaces.
In described signal amplifier, the Vin+ of precision amplifier U4 is respectively with Vin-the pin be connected with the output of sensor, Vo output is the pin of the input end of access RMS-DC converter, and regulator potentiometer RP3 is serially connected with between the 1st pin and the 8th pin of precision amplifier U4.
Particularly, precision amplifier U4 selects INA114 or other instrumentation amplifiers.
The core of described RMS-DC converter adopts real effective conversion chip U5.
The simulation of 16 precision of described AD converter-digital quantizer U6 is with voltage-reference in sheet, and its 6th pin connects regulator potentiometer RP5, and the 3rd pin and the 4th pin are respectively SCL pin and the SDA pin that carries out the I2C communication with microprocessor.
Microprocessor U7 of the present utility model selects single-chip microcomputer or the processors such as ARM, FPGA, and is provided for the interface of four independent buttons.Display is selected LCD or other TFT, light-emitting diode display.
Fluid metal worn particle on-line monitoring system of the present utility model, the excitation AC signal generator produces the excitation power supply input of excitation AC signal for sensor.Pumping signal produces sinusoidal signal by waveform generator chip U1, and by amplifier, sinusoidal signal is amplified.
Signal amplifier amplifies sensor output, and the choose reasonable non-essential resistance just can arrange gain from 1 to 10000.
The RMS-DC converter converts d. c. voltage signal to, converts the alternating voltage of input to effective direct current output, for AD converter, converts the discernible digital signal of microcontroller to.
Microprocessor carries out signal identification and processes, relevant information by display displaying system, as real-time fluid metal worn particle concentration etc., when concentration surpasses the threshold values of setting, microprocessor is controlled alarm and is sent alerting signal, to remind timely replacing fluid, prevent that the metal worn particle in fluid from aggravating the wearing and tearing to machine parts, thereby reach the purpose to fluid metal worn particle concentration on-line monitoring.Keyboard is that (keystroke interface, for the parameter setting of sensor for simple 4 independent buttons.
Fluid metal worn particle on-line monitoring system of the present utility model is rational in infrastructure, and the monitoring sensitivity of the feeble signal that inductance type transducer is exported is high, and the linearity is good, and antijamming capability is strong, and working stability is reliable.Easy to operate, real-time is good, and measuring accuracy is high, and monitoring result accurately and reliably.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 the generation of all kinds of engine accidents.
The accompanying drawing explanation
Fig. 1 is fluid metal worn particle on-line monitoring system structured flowchart of the present utility model.
Fig. 2 is sensor construction schematic diagram of the present utility model.
Fig. 3 is the physical circuit schematic diagram of monitoring system of the present utility model.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Fluid metal worn particle on-line monitoring system of the present utility model is can be by the oil circuit of fluid in its sensor; The excitation AC signal generator connects the drive coil of two identical sensors, the inductive coil of these two sensors connects signal amplifier, after signal amplifier, be linked in sequence RMS-DC converter, AD converter, microprocessor and display, microprocessor also connects respectively keyboard and alarm (see figure 1).
The structure of described sensor is specially: the frame center made from the magnetic-lag material arranges can be by the oil circuit of fluid, drive coil and inductive coil coaxially are wound on skeleton, inductive coil is between drive coil and skeleton, the axial length of inductive coil is 1/3 of drive coil axial length, and the axial midpoint of inductive coil overlaps (see figure 2) with the axial midpoint of drive coil.
In the utility model, integrated transporting discharging U2 and high-speed buffer U3 are linked in sequence after waveform generator U1 in described excitation AC signal generator; Meet a potentiometer RP2 between potentiometer RP1 of serial connection and resistance R 1, the 1 pin and the 8th pin between the 1st pin of waveform generator U1 and the 10th pin, connect a concussion capacitor C 1 between the 5th pin and ground.
Particularly, waveform generator U1 selects MAX038.
In described signal amplifier, the Vin+ of precision amplifier U4 is respectively with Vin-the pin be connected with the output of sensor, Vo output is the pin of the input end of access RMS-DC converter, and regulator potentiometer RP3 is serially connected with between the 1st pin and the 8th pin of precision amplifier U4.
Particularly, precision amplifier U4 selects INA114.
The core of described RMS-DC converter adopts real effective conversion chip U5.
The simulation of 16 precision of described AD converter-digital quantizer U6 is with voltage-reference, and its 6th pin connects regulator potentiometer RP5, and the 3rd pin and the 4th pin are respectively SCL pin and the SDA pin that carries out the I2C communication with microprocessor.
Microprocessor U7 of the present utility model selects single-chip microcomputer, and is provided for four independent keystroke interface.Display is selected LCD display.
Referring to Fig. 3.The metering circuit of fluid metal worn particle on-line monitoring sensor, comprise excitation ac signal circuit 1, sensor amplifier circuit 2, RMS-DC change-over circuit 3, A/D convertor circuit 4, microcontroller and control circuit 5 thereof.Described excitation ac signal circuit, comprise waveform generator U1, integrated transporting discharging U2, high-speed buffer U3, RP1, RP2, R1 ~ R5 and C1 ~ C3.A potentiometer RP1 of serial connection and a R1 between the 1st pin of waveform generator and the 10th pin.Meet a potentiometer RP2 between the 1st pin and the 8th pin.RP1 and RP2 realize respectively coarse adjustment and the accurate adjustment of waveform signal frequency.Connect a concussion capacitor C 1 between the 5th pin and ground.The waveform signal produced amplifies by integrated transporting discharging U2, and increases the carrying load ability of output signal by high-speed buffer U3, and generation can be for the ac-excited power supply of sensor.Described sensor device amplifying circuit comprises precision amplifier U4, resistance R 6, potentiometer RP3, C4 and C5, with the Vin-pin, with sensor, output is connected the Vin+ of precision amplifier respectively, the input end of the Vo output access RMS-DC change-over circuit of amplifier, regulator potentiometer RP3 can realize the variation of amplifier gain.Described RMS-DC change-over circuit comprises RMS-DC converter U5, potentiometer RP4, R7, C6, C8, C9, can change effective direct current output that comes true during input ac voltage.Described A/D convertor circuit comprises 16 AD chips, R8, R9, D1, RP5 and C10.Can exchange zero signal to sensor by adjusting RP5 compensates.Described microprocessor controls main circuit will comprise single-chip microcomputer U7, alarm LS1, display lcd 1 and four independent keystroke interface.
Claims (10)
1. fluid metal worn particle on-line monitoring system, comprise sensor, microprocessor and signal condition and Acquisition Circuit, it is characterized in that:
Sensor is the solenoid type inductance sensor, in its solenoid, is can be by the oil circuit of fluid; The excitation AC signal generator connects the drive coil of two identical sensors, the inductive coil of these two sensors connects signal amplifier, after signal amplifier, be linked in sequence RMS-DC converter, AD converter, microprocessor and display, microprocessor also connects respectively keyboard and alarm.
2. according to the monitoring system of claim 1, it is characterized in that: the frame center of making at the magnetic-lag material of described sensor arranges can be by the oil circuit of fluid, drive coil and inductive coil coaxially are wound 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 the axial midpoint of inductive coil overlaps with the axial midpoint of drive coil.
3. according to the monitoring system of claim 1, it is characterized in that: integrated transporting discharging U2 and high-speed buffer U3 are linked in sequence after waveform generator U1 in described excitation AC signal generator; Meet a potentiometer RP2 between potentiometer RP1 of serial connection and resistance R 1, the 1 pin and the 8th pin between the 1st pin of waveform generator U1 and the 10th pin, connect a concussion capacitor C 1 between the 5th pin and ground.
4. according to the monitoring system of claim 3, it is characterized in that: waveform generator U1 selects MAX038.
5. according to the monitoring system of claim 1, it is characterized in that: in described signal amplifier, the Vin+ of precision amplifier U4 is respectively with Vin-the pin be connected with the output of sensor, Vo output is the pin of the input end of access RMS-DC converter, and regulator potentiometer RP3 is serially connected with between the 1st pin and the 8th pin of precision amplifier U4.
6. according to the monitoring system of claim 5, it is characterized in that: precision amplifier U4 selects INA114.
7. according to the monitoring system of claim 1, it is characterized in that: the core of described RMS-DC converter adopts real effective conversion chip U5.
8. according to the monitoring system of claim 1, it is characterized in that: the simulation of 16 precision of described AD converter-digital quantizer U6 is with voltage-reference, its the 6th pin connects regulator potentiometer RP5, and the 3rd pin and the 4th pin are respectively SCL pin and the SDA pin that carries out the I2C communication with microprocessor.
9. according to the monitoring system of claim 1, it is characterized in that: microprocessor U7 selects single-chip microcomputer, ARM or FPGA processor, and is provided for the interface of four independent buttons.
10. according to the monitoring system of claim 1, it is characterized in that: display is selected LCD, TFT or light-emitting diode display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320332042 CN203365280U (en) | 2013-06-09 | 2013-06-09 | On-line monitoring system for metal grains in oil liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320332042 CN203365280U (en) | 2013-06-09 | 2013-06-09 | On-line monitoring system for metal grains in oil liquid |
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| CN 201320332042 Withdrawn - After Issue CN203365280U (en) | 2013-06-09 | 2013-06-09 | On-line monitoring system for metal grains in oil liquid |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN104697910A (en) * | 2015-03-05 | 2015-06-10 | 清华大学 | On-line detection sensor for content of ferromagnetic abrasive particles in lubricating oil |
| CN105928843A (en) * | 2016-05-12 | 2016-09-07 | 绍兴文理学院 | Wear particle online monitoring device adopting rotational flow centrifugation, adsorption and adjacent capacitance |
| CN106018211A (en) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | On-line wear particle monitoring method achieved through centrifugation, electric control ring adsorption and adjacent capacitance |
| BE1023946B1 (en) * | 2016-03-14 | 2017-09-19 | Safran Aero Boosters Sa | PARTICLE SENSOR IN A FLUID OF A LUBRICATION SYSTEM |
| CN109798303A (en) * | 2019-02-26 | 2019-05-24 | 西安交通大学 | A kind of closed bearing lubricating oil state and bearing fault on-line monitoring system |
| CN111504859A (en) * | 2020-04-28 | 2020-08-07 | 沈阳顺义科技有限公司 | System and method for online monitoring and evaluation of lubricating oil abrasive particles |
| CN115639116A (en) * | 2022-11-14 | 2023-01-24 | 南京航空航天大学 | Induction type oil abrasive particle sensor signal processing system and method |
-
2013
- 2013-06-09 CN CN 201320332042 patent/CN203365280U/en not_active Withdrawn - After Issue
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344535B (en) * | 2013-06-09 | 2015-04-22 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN104697910A (en) * | 2015-03-05 | 2015-06-10 | 清华大学 | On-line detection sensor for content of ferromagnetic abrasive particles in lubricating oil |
| CN104697910B (en) * | 2015-03-05 | 2017-03-01 | 清华大学 | The detecting line sensor of ferromagnetism abrasive grain content in a kind of lubricating oil |
| EP3220168A1 (en) * | 2016-03-14 | 2017-09-20 | Safran Aero Booster S.A. | Particle sensor in a fluid of a lubrication system |
| WO2017157855A1 (en) * | 2016-03-14 | 2017-09-21 | Safran Aero Boosters S.A. | Sensor for detecting particles in a fluid of a lubrication system |
| BE1023946B1 (en) * | 2016-03-14 | 2017-09-19 | Safran Aero Boosters Sa | PARTICLE SENSOR IN A FLUID OF A LUBRICATION SYSTEM |
| CN105928843A (en) * | 2016-05-12 | 2016-09-07 | 绍兴文理学院 | Wear particle online monitoring device adopting rotational flow centrifugation, adsorption and adjacent capacitance |
| CN106018211A (en) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | On-line wear particle monitoring method achieved through centrifugation, electric control ring adsorption and adjacent capacitance |
| CN109798303A (en) * | 2019-02-26 | 2019-05-24 | 西安交通大学 | A kind of closed bearing lubricating oil state and bearing fault on-line monitoring system |
| CN109798303B (en) * | 2019-02-26 | 2020-05-22 | 西安交通大学 | Closed bearing lubricating oil state and bearing fault on-line monitoring system |
| CN111504859A (en) * | 2020-04-28 | 2020-08-07 | 沈阳顺义科技有限公司 | System and method for online monitoring and evaluation of lubricating oil abrasive particles |
| CN111504859B (en) * | 2020-04-28 | 2021-04-06 | 沈阳顺义科技有限公司 | System and method for online monitoring and evaluation of lubricating oil abrasive particles |
| CN115639116A (en) * | 2022-11-14 | 2023-01-24 | 南京航空航天大学 | Induction type oil abrasive particle sensor signal processing system and method |
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Granted publication date: 20131225 Effective date of abandoning: 20150422 |