CN102818754B

CN102818754B - Method and device of improving online monitoring accuracy of engine oil metal abrasive particles

Info

Publication number: CN102818754B
Application number: CN201210326744.3A
Authority: CN
Inventors: 林俊明
Original assignee: Eddysun Xiamen Electronic Co Ltd
Current assignee: Eddysun Xiamen Electronic Co Ltd
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2014-08-27
Anticipated expiration: 2032-09-06
Also published as: CN102818754A

Abstract

The invention discloses a method and a device of improving online monitoring accuracy of engine oil metal abrasive particles, designing a detection device capable of improving the online monitoring accuracy of the metal abrasive particles in engine oil and integrating an absolute electromagnetic detection technology, a differential motion electromagnetic detection technology and an array electromagnetic detection technology. According to the method and the device disclosed by the invention, online dynamic detection is carried out on the metal abrasive particles in the engine oil by adopting an integrated combination detection mode of absolute electromagnetic detection, differential motion electromagnetic detection and array electromagnetic detection, so that antijamming capability, monitoring accuracy and monitoring sensitivity of the device are improved, quality of the metal abrasive particles which pass through an oil return pipeline of an engine can be effectively measured in real time, and material quality is simultaneously separated by utilizing the characteristics that magnetic conductivity and electric conductivity of metal abrasive particles of copper abrasive particles, aluminum abrasive particles, iron abrasive particles and the like are different, so that the abrasion condition of the engine is judged, and alarm is sent out when abrasion loss reaches a preset upper limit threshold value, thereby timely eliminating safety hidden dangers due to abrasion of the engine and ensuring normal work of the engine.

Description

A kind of method and device that improves engine fluid metal worn particle on-line monitoring precision

Technical field

The present invention relates to a kind of lossless detection method and device, particularly relate to a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision.

Background technology

Engine be a kind of can another kind of being converted into of other form can machine, be a kind of mechanical hook-up that produces power, engine is widely used on all kinds of transport facilitys, such as aircraft, steamer, train, automobile etc.Engine belongs to " heart " parts in transport facility, the working condition of engine will directly have influence on travelling and safety of transport facility, if the building block of engine has in use produced larger wearing and tearing, will have influence on the normal work of engine, therefore, the state of wear of engine is monitored and fault diagnosis, could ensure the normal work of engine.In prior art, the state of wear of engine is detected and normally adopts fluid detection method, fluid detection method is a kind of method of in the situation that not disintegrating engine, engine scuffing situation being monitored, it analyzes judgement by the lubricating oil extracting in engine to engine scuffing state, and the fluid detection method of prior art mainly contains Oil Spectral Analysis method and fluid method for analyzing iron spectrum.In two kinds of above-mentioned methods, no matter be that one, all need to from engine, extract lubricating oil, and then in laboratory, the metal worn particle in the lubricating oil extracting is analyzed, belong to the offline inspection to engine fluid, the sense cycle of this offline inspection mode is long, can not find in time the potential safety hazard that engine exists.Online electromagnetism fluid monitoring device detection speed is fast, be easy to realize dynamic monitoring, external existing a small amount of online electromagnetic detection and method at present, but installation method is comparatively single, designed electromagnetic detection sensor mostly is single magnetic test coil, because the common working environment of engine is comparatively severe, therefore, there are normal wearing and tearing, produce minute abrasive group relatively uniformly, and absolute electromagnetic detection coil can detect the minute metallic abrasive particle group's who passes through continuously concentration change, this point does not embody in existing square law device, differential electromagnetic magnetic test coil (is for example greater than 100 μ detection sensitivity m) high compared with absolute type to larger metal worn particle, antijamming capability is stronger simultaneously, because electromagnetic detection coil is very sensitive to the induction of electromagnetic field, vibration and external electromagnetic noise can produce undesired signal and be sent to electromagnetic detection instrument, the advantage of differential electromagnetic magnetic test coil group is, the secondary reflection field signal that the actual measurement metal worn particle of process produces and undesired signal difference are very large, differential electromagnetic magnetic test coil group receives and transfers to the secondary reflection field signal of the actual measurement metal worn particle generation of electromagnetic detection instrument, in electromagnetic detection instrument impedance plane display mode, it is the detection signal figure of similar 8 fonts, two intensity are identical, the figure of the signal splicing of single spin-echo, and undesired signal there will not be 8 font signal graphs of above-mentioned symmetry, electromagnetic detection instrument can be identified differentiation by the mode that warning gate is set, but when part metals abrasive particle depart from engine oil return pipe axis flow time, due to the impact of eddy effect, detection signal can be bigger than normal, cause erroneous judgement, affect the normal work of engine, due to many reasons such as above-mentioned, online electromagnetism fluid monitoring device cannot really be widely applied so far.

Summary of the invention

The object of the invention is to overcome the deficiency of prior art, a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision is provided, design a kind of integrated absolute Electromagnetic Testing Technology that can improve metal worn particle On-Line Dynamic Monitoring precision in engine fluid, the monitoring device of differential electromagnetic detection technique and array Electromagnetic Testing Technology, adopt absolute electromagnetic detection, differential electromagnetic detects and the integrated combination detection mode of array electromagnetic detection is carried out On-Line Dynamic Monitoring to the metal worn particle in engine fluid, by the mode of " memory " characteristic signal, set up associated databases, the various form differences of passing through in comparison scavenge pipe in real time, became uneven, the metal worn particle that material is different, by the sorting to various metal worn particles and analysis, judge in time the abrasion condition of engine, to determine whether to produce alerting signal, thereby can eliminate in time the potential safety hazard existing due to the wearing and tearing of engine, ensure the normal work of engine.

The technical solution adopted for the present invention to solve the technical problems is: a kind of device that improves engine fluid metal worn particle on-line monitoring precision, and device is made up of tubular type electromagnetism integrated sensor, sensor wire, electromagnetic detection instrument; Described tubular type electromagnetism integrated sensor is made up of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, sensor output multi-core socket, nonmetal pipe, metallic shield pipe, two metal adapter rings; The absolute electromagnetic detection coil of described jacket-type is made up of an outer electromagnetic detection coil that is wound around, its absolute output terminal is connected to sensor output multi-core socket, the material of the absolute electromagnetic detection coil of jacket-type is red copper enameled wire, dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require definite, and the axial cover width of the absolute electromagnetic detection coil of jacket-type is larger than the axial cover width of jacket-type differential electromagnetic magnetic test coil group; Described jacket-type differential electromagnetic magnetic test coil group is by two anti-phase connecting to form of outer winding electromagnetic detection coil, its differential output end is connected to sensor output multi-core socket, material, size, the wound convolution number of two outer winding electromagnetic detection coils are identical, material is red copper enameled wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require to determine; Described annular flexible array electric magnetic probe group is uniformly arranged and fixed and is formed on flexible PCB by multiple array element coils, annular flexible array electric magnetic probe group is circumferentially evenly wrapped on nonmetal pipe appearance, and the output terminal of each array element coil is connected to respectively sensor output multi-core socket by flexible PCB; The material of each array element coil, size, wound convolution number are identical, and material is red copper enameled wire or other wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution and sensitivity require to formulate; The quantity of array element coil is definite according to the diameter of nonmetal pipe and accuracy of detection requirement, and nonmetal pipe diameter is larger, accuracy of detection requires the quantity of higher array element coil more; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group are fixedly wrapped in respectively between nonmetal pipe outside surface and metallic shield pipe; Described nonmetal round tube inside diameter is identical with engine oil return bore, and the length of nonmetal pipe is greater than the summation of the width of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, sensor output multi-core socket; Metallic shield length of tube is identical with nonmetal pipe length, and sensor output multi-core socket is fixed on nonmetal pipe outside surface, and penetrating metal shielded-plate tube tube wall, for connecting sensor cable; The core of sensor output multi-core socket is counted specification and is determined according to the output terminal quantity of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group; Two described metal adapter rings are fixed on metallic shield pipe two ends, and the internal diameter of metal adapter ring is identical with the external diameter of engine oil return pipe, and metal adapter ring inside surface has screw thread, for connecting engine scavenge pipe; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, nonmetal pipe, metallic shield pipe, two metal adapter rings are coaxial.

A method that improves engine fluid metal worn particle on-line monitoring precision, comprises and demarcates first and survey two processes.

Described calibration process is first, in the time of operative installations first, device need to be demarcated, and calibration process comprises the steps: first

A. the two ends of tubular type electromagnetism integrated sensor and the engine oil return pipe of demarcating use are connected and fixed, with sensor wire connecting circular tube type electromagnetism integrated sensor and electromagnetic detection instrument, open electromagnetic detection instrument, electromagnetic detection instrument is to the absolute electromagnetic detection coil of jacket-type in tubular type electromagnetism integrated sensor, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group applies the pulse excitation signal of predetermined frequency, make the absolute electromagnetic detection coil of jacket-type in tubular type electromagnetism integrated sensor, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group produces respectively corresponding transient state alternating electromagnetic field,

B. allow the demarcation metal worn particle group's of containing known material and quality model engine fluid with constant speed by the tubular type electromagnetism integrated sensor of described demarcation use, described known material and the demarcation metal worn particle group of quality contain that material is identical, evenly close small demarcation metal worn particle group and the large metal worn particle of demarcation that several keep at a certain distance away and quality is larger of quality, conventionally demarcate metal worn particle group and are flowed in the axis along tubular type electromagnetism integrated sensor; Known quality is demarcated metal worn particle group will flow through the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group successively;

C. first, when the demarcation metal worn particle group of known material and quality flows through the absolute electromagnetic detection coil of jacket-type, be subject to the excitation of the transient state alternating electromagnetic field that the absolute electromagnetic detection coil of jacket-type produces and produce corresponding secondary reflection magnetic field, the absolute electromagnetic detection coil of jacket-type picks up the absolute signal in this secondary reflection magnetic field, and this absolute signal is sent to electromagnetic detection instrument; Electromagnetic detection instrument is processed into described absolute signal the detection data that become corresponding relation with this demarcation metal worn particle group's known material with known quality mean value, and show corresponding absolute signal figure or numerical value, detect data and comprise signal strength data and signal phase data, the corresponding known quality mean value of signal strength data, the corresponding known material of signal phase data.Generally, in fluid, minute metallic abrasive particle group is relatively even when mobile, and the absolute electromagnetic detection coil of jacket-type can detect it; And the number of large metal worn particle is relatively less, therefore from superposition principle, jacket-type differential electromagnetic magnetic test coil group can be given and being distinguished.Therefore, the absolute electromagnetic detection coil of jacket-type aims at the mean value that detects minute metallic abrasive particle group, and jacket-type differential electromagnetic magnetic test coil group aims at and detects large metal worn particle, and annular flexible array electric magnetic probe group is used for revising the detection data of differential winding;

D. subsequently, the demarcation metal worn particle group of known material and quality is in the time flowing through jacket-type differential electromagnetic magnetic test coil group, be subject to jacket-type differential electromagnetic magnetic test coil group produce transient state alternating electromagnetic field excitation and produce corresponding secondary reflection magnetic field, because jacket-type differential electromagnetic magnetic test coil group is by two anti-phase connecting to form of jacket-type electromagnetic detection coil, two transient state alternating electromagnetism field strengties that produce are identical, single spin-echo, two secondary reflection magnetic field intensitys that produced so the demarcation metal worn particle group of known material and quality encourages are identical, single spin-echo, when the described demarcation minute metallic abrasive particle group in the demarcation metal worn particle group of known material and quality is with constant speed uniform-flow during through jacket-type differential electromagnetic magnetic test coil group, the secondary reflection magnetic field intensity of generation is evenly unchanged, in the time that described in the demarcation metal worn particle group of known material and quality demarcated large metal worn particle and flow through jacket-type differential electromagnetic magnetic test coil group, secondary reflection magnetic field intensity increases suddenly, jacket-type differential electromagnetic magnetic test coil group is picked up the differential relatively detection signal in this secondary reflection magnetic field increasing suddenly, and this differential relatively detection signal is sent to electromagnetic detection instrument, electromagnetic detection instrument is processed into this differential relatively detection signal to have demarcated the known material of large metal worn particle with described in this demarcation metal worn particle group and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential relatively detection signal figure, detect data and comprise signal strength data and signal phase data, the corresponding known quality of signal strength data, the corresponding known material of signal phase data,

E. next, known quality is demarcated metal worn particle group in the time flowing through annular flexible array electric magnetic probe group, known quality is demarcated metal worn particle group and is subject to the excitation of the transient state alternating electromagnetic field that in annular flexible array electric magnetic probe group, each array element coil produces and produces corresponding secondary reflection magnetic field, in annular flexible array electric magnetic probe group, each array element coil picks up corresponding secondary reflection magnetic field separately, and this secondary reflection field signal is transferred to electromagnetic detection instrument, electromagnetic detection instrument is processed into described secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle group's known quality, in the time that demarcation metal worn particle group is flowed along tubular type electromagnetism integrated sensor axis with constant speed, demarcating metal worn particle group equates with the distance between each array element coil in annular flexible array electric magnetic probe group, the each secondary reflection field signal intensity producing is identical, and electromagnetic detection instrument does not record these secondary reflection field signals and detects data, in the time flowing in the described axis of having demarcated large metal worn particle stray circle cast electromagnetism integrated sensor in demarcation metal worn particle group, it is described that to have demarcated in large metal worn particle and annular flexible array electric magnetic probe group the distance between each array element coil unequal, the each secondary reflection field signal intensity producing is not identical, the described secondary reflection field signal intensity maximum of having demarcated the nearest array element coil reception of large metal worn particle of distance, the difference of these secondary reflection field signal intensity of electromagnetic detection instrument analytic record, described in being converted to, difference demarcates the modified value of large metal worn particle quality, described in correction replacement, demarcate large metal worn particle and departed from the signal strength data bigger than normal producing when jacket-type differential electromagnetic magnetic test coil group is flowed through in axis.Because the distance between size and electromagnetic detection coil and the metal worn particle of secondary reflection field signal intensity and metal worn particle is directly proportional, the larger secondary reflection field signal of metal worn particle intensity is larger, the nearlyer secondary reflection field signal of distance intensity between electromagnetic detection coil and metal worn particle is larger, the most of metal worn particle flowing in engine oil return pipe can flow along the axis of engine oil return pipe, but the engine being kept in motion (such as aloft aircraft engine) is owing to changing translational speed and the reason such as rocking, large metal worn particle in engine oil return pipe can will depart from scavenge pipe axis and flow, distance between large metal worn particle and differential electromagnetic magnetic test coil group diminishes, it is large that secondary reflection field signal intensity becomes, electromagnetic detection instrument is the size of judging metal worn particle according to signal intensity, therefore, the large metal worn particle size that now electromagnetic detection instrument is judged will be greater than actual large metal worn particle size, there is erroneous judgement false alarm,

F. constantly change is demarcated the numerical value of metal worn particle group's known quality by the known material of the engine oil return pipeline of described demarcation use, repeating step b, step c, steps d, step e, thus several different numerical value of demarcating metal worn particle group's known quality from known material obtained and become the detection data of one-to-one relationship;

G. by electromagnetic detection instrument signal processing software, above-mentioned several are detected to data and become the numerical value of the demarcation metal worn particle group's of one-to-one relationship known quality to be processed into one taking signal strength data as horizontal ordinate with these several detection data, the relation curve that the numerical value of demarcating metal worn particle group's quality is ordinate, wherein, smoothing processing between 2, this relation curve preserved in electromagnetic detection instrument record;

H. set known material by electromagnetic detection instrument signal processing software and demarcate the upper limit threshold of metal worn particle group gross mass.

Device operation first advance rower fixed after, all calibrating parameters have been saved in electromagnetic detection instrument, afterwards the tubular type electromagnetism integrated sensor in device and the engine oil return pipe of actual measurement use are connected and fixed, electromagnetic detection instrument is fixed in operating personnel operating room, is monitored by operating personnel.After this detected parameters that after each starter gear, electromagnetic detection instrument directly calls demarcation is carried out monitoring, conventionally without again demarcating.

In described actual measurement process, comprise the steps:

I. the two ends of tubular type electromagnetism integrated sensor and the engine oil return pipe of actual measurement use are connected and fixed, electromagnetic detection instrument applies the pulse excitation signal of predetermined frequency to the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group in tubular type electromagnetism integrated sensor, make the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group in tubular type electromagnetism integrated sensor produce respectively corresponding transient state alternating electromagnetic field;

J. in the time that electromagnetic detection instrument receives the absolute signal of the absolute electromagnetic detection coil transmission of jacket-type, be judged to be actual measurement metal worn particle group by the engine oil return pipe of actual measurement use, the detection data in the secondary reflection magnetic field of reading are passed through to described relation curve, obtain the numerical value of the quality of surveying the actual measurement metal worn particle passing through in the engine oil return pipe of use, this numerical value is kept in the storage medium of electromagnetic detection instrument; Described actual measurement metal worn particle group contains the large metal worn particle of actual measurement of a large amount of actual measurement minute metallic abrasive particle groups and a small amount of larger quality, conventionally surveys metal worn particle group and is flowed in the axis along tubular type electromagnetism integrated sensor;

K. in the time that electromagnetic detection instrument receives the differential comparison signal of jacket-type differential electromagnetic magnetic test coil group transmission, be judged to be the large metal worn particle of actual measurement by the engine oil return pipe of actual measurement use, the detection data in the secondary reflection magnetic field of reading are passed through to described relation curve, obtain the numerical value of the quality of surveying the large metal worn particle of actual measurement passing through in the engine oil return pipe of use, this numerical value is kept in the storer of electromagnetic detection instrument;

L., when the secondary reflection field signal intensity that collects respectively when the each array element coil of annular flexible array electric magnetic probe group in tubular type electromagnetism integrated sensor is identical, electromagnetic detection instrument does not record these secondary reflection field signals and detects data, when the secondary reflection field signal intensity that collects respectively when the each array element coil of annular flexible array electric magnetic probe group in tubular type electromagnetism integrated sensor is not identical, illustrate that surveying large metal worn particle stray circle cast electromagnetism integrated sensor axis has passed through annular flexible array electric magnetic probe group, the difference of the secondary reflection field signal intensity that the each array element coil of electromagnetic detection instrument analytic record collects respectively, difference is converted to the modified value of the large metal worn particle quality of corresponding actual measurement, and survey the detection data bigger than normal that produce when large metal worn particle departs from axis by jacket-type differential electromagnetic magnetic test coil group by this modified value correction, and by described relation curve, obtain the numerical value of the quality of the large metal worn particle of actual measurement passing through in the engine oil return pipe of revised actual measurement use, this numerical value is kept in the storage medium of electromagnetic detection instrument,

M. within a preset time period, the numerical value of the quality to all actual measurement metal worn particle groups that pass through tubular type electromagnetism integrated sensor that obtain carries out accumulation calculating, obtain an accumulated value, the upper limit threshold of this accumulated value and preset known quality being demarcated to metal worn particle group gross mass compares judgement, in the time that this accumulated value is more than or equal to the upper limit threshold of described known quality demarcation metal worn particle group gross mass, electromagnetic detection instrument sends alerting signal.

Further, in described calibration process first, the demarcation metal worn particle group of described known material and quality can be copper, aluminium and ferrous metal abrasive particle, respectively to copper, aluminium and ferrous metal abrasive particle are carried out described step a, step b, step c, steps d, step e, step f, step g, step h, obtain respectively thus one taking signal strength data as horizontal ordinate, the numerical value of the quality of copper is the relation curve of the copper of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of aluminium is the relation curve of the aluminium of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of iron is the relation curve of the iron of ordinate, copper, the material of aluminium and iron abrasive particle is by signal phase data separation, in actual measurement process, perform step respectively i, step j, step k, step l, step m obtains surveying the detection data in the secondary reflection magnetic field of the actual measurement metal worn particle group in the engine oil return pipe of use, sort out the material of demarcating metal worn particle group by signal phase data analysis, and respectively by the relation curve of copper of demarcating, the relation curve of aluminium and the relation curve of iron, obtain respectively the numerical value of the quality of copper, the numerical value of the numerical value of the quality of aluminium and the quality of iron, in actual measurement process, because engine components are made up of various metals, in engine fluid, can contain various metals abrasive particle, these metal worn particles of classification monitoring are for assessment engine behavior and have very important effect serviceable life.

Further, in described actual measurement process, execution step i, step j, step k, after step l, at least two preset time periods are set in step m, in each preset time period, the numerical value of the quality to all actual measurement metal worn particle groups that pass through tubular type electromagnetism integrated sensor that obtain carries out accumulation calculating, thereby obtain at least two accumulated values, all accumulated values are added up to obtain total accumulated value again, the quantity divided by the preset time period by total accumulated value again, obtain average accumulated value, the upper limit threshold of the demarcation metal worn particle group gross mass of this average accumulated value and preset known material and quality is compared to judgement, in the time that this average accumulated value is more than or equal to the upper limit threshold of demarcation metal worn particle group gross mass of described known material and quality, electromagnetic detection instrument sends alerting signal, the method of multiple preset time periods of this set, can further improve monitoring accuracy.

The invention has the beneficial effects as follows, a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision, adopt absolute electromagnetic detection, differential electromagnetic detects and the integrated combination detection mode of array electromagnetic detection is carried out online detection of dynamic to the metal worn particle in engine fluid, by the mode of " memory " characteristic signal, set up associated databases, the various form differences of passing through in comparison scavenge pipe in real time, became uneven, the metal worn particle that material is different, by the sorting to various metal worn particles and analysis, judge in time the abrasion condition of engine, to determine whether to produce alerting signal, thereby can eliminate in time the potential safety hazard existing due to the wearing and tearing of engine.Affect the problem of accuracy of detection and sensitivity owing to efficiently solving high temperature, vibration, external electromagnetic interference etc., make electromechanical detection method can really be applied to the work of engine fluid On-Line Dynamic Monitoring, the duty of monitoring engine, ensures its safe operation in real time.

Below in conjunction with embodiment, the present invention is described in further detail; But a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision of the present invention is not limited to embodiment.

Brief description of the drawings

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is the schematic diagram of device of first embodiment of the invention.

Fig. 2 is the tubular type electromagnetism integrated sensor schematic diagram of first embodiment of the invention.

Fig. 3 is the tubular type electromagnetism integrated sensor inner structure schematic diagram of first embodiment of the invention.

Fig. 4 is the calibration process schematic diagram of first embodiment of the invention.

Fig. 5 is the actual measurement process schematic diagram of first embodiment of the invention.

In figure, 1. tubular type electromagnetism integrated sensor, 2. sensor wire, 3. electromagnetic detection instrument, 4. the absolute electromagnetic detection coil of jacket-type, 5. jacket-type differential electromagnetic magnetic test coil group, 6. annular flexible array electric magnetic probe group, 7. array element coil, 8. flexible PCB, 9. sensor output multi-core socket, 10. nonmetal pipe, 11. metallic shield pipes, 12. metal adapter rings, 13. demarcate the engine oil return pipe of use, 14. model engine fluid, 15. demarcate metal worn particle group, 16. have demarcated minute metallic abrasive particle group, 17. have demarcated large metal worn particle, the engine oil return pipe of 18. actual measurement use, 19. actual measurement engine fluid, 20. actual measurement metal worn particle groups, 21. actual measurement minute metallic abrasive particle groups, the large metal worn particle of 22. actual measurement.

Embodiment

In the first embodiment shown in Fig. 1, Fig. 2, Fig. 3, a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision, device is made up of tubular type electromagnetism integrated sensor (1), sensor wire (2), electromagnetic detection instrument (3); Described tubular type electromagnetism integrated sensor (1) is made up of the absolute electromagnetic detection coil of jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6), sensor output multi-core socket (9), nonmetal pipe (10), metallic shield pipe (11), two metal adapter rings (12); The absolute electromagnetic detection coil of described jacket-type (4) is made up of an outer electromagnetic detection coil that is wound around, its absolute output terminal is connected to sensor output multi-core socket (9), the material of the absolute electromagnetic detection coil of jacket-type (4) is red copper enameled wire, dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require definite, and the axial cover width of the absolute electromagnetic detection coil of jacket-type (4) is generally large than the axial cover width of jacket-type differential electromagnetic magnetic test coil group (5).Described jacket-type differential electromagnetic magnetic test coil group (5) is by two anti-phase connecting to form of outer winding electromagnetic detection coil, its differential output end is connected to sensor output multi-core socket (9), material, size, the wound convolution number of two outer winding electromagnetic detection coils are identical, material is red copper enameled wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require to determine.Described annular flexible array electric magnetic probe group (6) is uniformly arranged and fixed and is formed on flexible PCB (8) by multiple array element coils (7), annular flexible array electric magnetic probe group (6) is circumferentially evenly wrapped on nonmetal pipe (10) appearance, and the output terminal of each array element coil (7) is connected to respectively sensor output multi-core socket (9) by flexible PCB (8); The material of each array element coil (7), size, wound convolution number are identical, and material is red copper enameled wire or other wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution and sensitivity require to formulate; The quantity of array element coil (7) is definite according to the diameter of nonmetal pipe (10) and accuracy of detection requirement, and nonmetal pipe (10) diameter is larger, accuracy of detection requires the quantity of higher array element coil (7) more; The absolute electromagnetic detection coil of described jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) are fixedly wrapped in respectively between nonmetal pipe (10) outside surface and metallic shield pipe (11); Described nonmetal pipe (10) internal diameter and engine oil return pipe (13,18) internal diameter is identical, and the length of nonmetal pipe (10) is greater than the summation of the width of the absolute electromagnetic detection coil of jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6), sensor output multi-core socket (9); Metallic shield pipe (11) length is identical with nonmetal pipe (10) length, and sensor output multi-core socket (9) is fixed on nonmetal pipe (10) outside surface, and penetrating metal shielded-plate tube (11) tube wall, for connecting sensor cable (2); The core of sensor output multi-core socket (9) is counted specification and is determined according to the output terminal quantity of the absolute electromagnetic detection coil of jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6); Described two metal adapter rings (12) are fixed on metallic shield pipe (11) two ends, the external diameter of the internal diameter of metal adapter ring (12) and engine oil return pipe (13,18) is identical, and metal adapter ring (12) inside surface has screw thread, for connecting engine scavenge pipe (13,18); The absolute electromagnetic detection coil of described jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6), nonmetal pipe (10), metallic shield pipe (11), two metal adapter rings (12) are coaxially.

A kind of described method that improves metal worn particle On-Line Dynamic Monitoring precision in engine fluid, comprises and demarcates first and survey two processes.

Shown in Fig. 4, in the first embodiment, described calibration process first comprises the steps:

A. the two ends of tubular type electromagnetism integrated sensor (1) and the engine oil return pipe (13) of demarcating use are connected and fixed, with sensor wire (2) connecting circular tube type electromagnetism integrated sensor (1) and electromagnetic detection instrument (3), open electromagnetic detection instrument (3), electromagnetic detection instrument (3) is to the absolute electromagnetic detection coil of jacket-type (4) in tubular type electromagnetism integrated sensor (1), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) applies the pulse excitation signal of predetermined frequency, make the absolute electromagnetic detection coil of jacket-type (4) in tubular type electromagnetism integrated sensor (1), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) produces respectively corresponding transient state alternating electromagnetic field,

B. allow the demarcation metal worn particle group's (15) of containing known material and quality model engine fluid (14) with constant speed by the tubular type electromagnetism integrated sensor (1) of described demarcation use, the demarcation metal worn particle group (15) of described known material and quality contains that material is identical, the evenly close minute metallic of demarcation abrasive particle group (16) and the large metal worn particle of demarcation (17) that several keep at a certain distance away and quality is larger of quality, and conventionally demarcating metal worn particle group (15) will flow along the axis of tubular type electromagnetism integrated sensor (1); Known quality is demarcated metal worn particle group (15) will flow through the absolute electromagnetic detection coil of jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) successively;

C. first, when the demarcation metal worn particle group (15) of known material and quality flows through the absolute electromagnetic detection coil of jacket-type (4), be subject to the absolute electromagnetic detection coil of jacket-type (4) produce transient state alternating electromagnetic field excitation and produce corresponding secondary reflection magnetic field, the absolute electromagnetic detection coil of jacket-type (4) picks up the absolute signal in this secondary reflection magnetic field, and this absolute signal is sent to electromagnetic detection instrument (3); Electromagnetic detection instrument (3) is processed into described absolute signal the detection data that become corresponding relation with this demarcation metal worn particle group's (15) known material with known quality mean value, and show corresponding absolute signal figure or numerical value, detect data and comprise signal strength data and signal phase data, the corresponding known quality mean value of signal strength data, the corresponding known material of signal phase data;

D. subsequently, the demarcation metal worn particle group (15) of known material and quality is in the time flowing through jacket-type differential electromagnetic magnetic test coil group (5), be subject to jacket-type differential electromagnetic magnetic test coil group (5) produce transient state alternating electromagnetic field excitation and produce corresponding secondary reflection magnetic field, because jacket-type differential electromagnetic magnetic test coil group (5) is by two anti-phase connecting to form of jacket-type electromagnetic detection coil, two transient state alternating electromagnetism field strengties that produce are identical, single spin-echo, two secondary reflection magnetic field intensitys that produced so the demarcation metal worn particle group (15) of known material and quality encourages are identical, single spin-echo, demarcated minute metallic abrasive particle group (16) with constant speed uniform-flow during through jacket-type differential electromagnetic magnetic test coil group (5) when described in the demarcation metal worn particle group of known material and quality, the secondary reflection magnetic field intensity of generation is evenly unchanged, in the time that described in the demarcation metal worn particle group (15) of known material and quality demarcated large metal worn particle (17) and flow through jacket-type differential electromagnetic magnetic test coil group (5), secondary reflection magnetic field intensity increases suddenly, jacket-type differential electromagnetic magnetic test coil group (5) is picked up the differential relatively detection signal in this secondary reflection magnetic field increasing suddenly, and this differential relatively detection signal is sent to electromagnetic detection instrument (3), electromagnetic detection instrument (3) is processed into this differential relatively detection signal to have demarcated the known material of large metal worn particle (17) with described in this demarcation metal worn particle group (15) and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential relatively detection signal figure, detect data and comprise signal strength data and signal phase data, the corresponding known quality of signal strength data, the corresponding known material of signal phase data,

E. next, known quality is demarcated metal worn particle group (15) in the time flowing through annular flexible array electric magnetic probe group (6), known quality is demarcated metal worn particle group (15) and is subject to the excitation of the transient state alternating electromagnetic field that in annular flexible array electric magnetic probe group (6), each array element coil (7) produces and produces corresponding secondary reflection magnetic field, in annular flexible array electric magnetic probe group (6), each array element coil (7) picks up corresponding secondary reflection magnetic field separately, and this secondary reflection field signal is transferred to electromagnetic detection instrument (3), electromagnetic detection instrument (3) is processed into described secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle group's (15) known quality, in the time that demarcation metal worn particle group (15) is flowed along tubular type electromagnetism integrated sensor (1) axis with constant speed, demarcating metal worn particle group (15) equates with the distance between each array element coil (7) in annular flexible array electric magnetic probe group (6), the each secondary reflection field signal intensity producing is identical, and electromagnetic detection instrument (3) does not record these secondary reflection field signals and detects data, in the time flowing in the described axis of having demarcated large metal worn particle (17) stray circle cast electromagnetism integrated sensor (1) in demarcation metal worn particle group (15), it is described that to have demarcated in large metal worn particle (17) and annular flexible array electric magnetic probe group (6) distance between each array element coil (7) unequal, the each secondary reflection field signal intensity producing is not identical, the described secondary reflection field signal intensity maximum of having demarcated nearest array element coil (7) reception of large metal worn particle (17) of distance, the difference of these secondary reflection field signal intensity of electromagnetic detection instrument (3) analytic record, described in being converted to, difference demarcates the modified value of large metal worn particle (17) quality, described in correction replacement, demarcate large metal worn particle (17) and departed from the signal strength data bigger than normal producing when jacket-type differential electromagnetic magnetic test coil group (4) is flowed through in axis,

F. constantly change is demarcated the numerical value of metal worn particle group's (15) known quality by the known material of the engine oil return pipeline (13) of described demarcation use, repeating step b, step c, steps d, step e, thus several different numerical value of demarcating metal worn particle group's (15) known quality from known material obtained and become the detection data of one-to-one relationship;

G. by electromagnetic detection instrument (3) signal processing software, above-mentioned several are detected to data and become the numerical value of the demarcation metal worn particle group's (15) of one-to-one relationship known quality to be processed into one taking signal strength data as horizontal ordinate with these several detection data, the relation curve that the numerical value of demarcating metal worn particle group's (15) quality is ordinate, wherein, smoothing processing between 2, this relation curve preserved in electromagnetic detection instrument (3) record;

H. set known material by electromagnetic detection instrument (3) signal processing software and demarcate the upper limit threshold of metal worn particle group (15) gross mass.

Device operation first advance rower fixed after, all calibrating parameters have been saved in electromagnetic detection instrument (3), afterwards the tubular type electromagnetism integrated sensor (1) in device and the engine oil return pipe (18) of actual measurement use are connected and fixed, electromagnetic detection instrument (3) is fixed in operating personnel operating room, is monitored by operating personnel.After this detected parameters that after each starter gear, electromagnetic detection instrument (3) directly calls demarcation is carried out monitoring, conventionally without again demarcating.

Shown in Fig. 5, in the first embodiment, described actual measurement process comprises the steps:

I. the two ends of tubular type electromagnetism integrated sensor (1) and the engine oil return pipe (18) of actual measurement use are connected and fixed, electromagnetic detection instrument (3) is to the absolute electromagnetic detection coil of jacket-type (4) in tubular type electromagnetism integrated sensor (1), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) applies the pulse excitation signal of predetermined frequency, make the absolute electromagnetic detection coil of jacket-type (4) in tubular type electromagnetism integrated sensor (1), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electric magnetic probe group (6) produces respectively corresponding transient state alternating electromagnetic field,

J. in the time that electromagnetic detection instrument (3) receives the absolute signal of the absolute electromagnetic detection coil of jacket-type (4) transmission, be judged to be actual measurement metal worn particle group (20) by the engine oil return pipe (18) of actual measurement use, the detection data in the secondary reflection magnetic field of reading are passed through to described relation curve, the numerical value that obtains the quality of surveying the actual measurement metal worn particle (20) passing through in the engine oil return pipe (18) of use, is kept at this numerical value in the storage medium of electromagnetic detection instrument (3); Described actual measurement metal worn particle group (20) contains the large metal worn particle of actual measurement (22) of a large amount of actual measurement minute metallic abrasive particle groups (21) and a small amount of larger quality, and conventionally surveying metal worn particle group (20) will flow along the axis of tubular type electromagnetism integrated sensor (1);

K. in the time that electromagnetic detection instrument (3) receives the differential comparison signal of jacket-type differential electromagnetic magnetic test coil group (5) transmission, be judged to be the large metal worn particle of actual measurement (22) by the engine oil return pipe (18) of actual measurement use, the detection data in the secondary reflection magnetic field of reading are passed through to described relation curve, the numerical value that obtains the quality of surveying the large metal worn particle of actual measurement (22) passing through in the engine oil return pipe (18) of use, is kept at this numerical value in the storer of electromagnetic detection instrument (3);

L., when the secondary reflection field signal intensity that collects respectively when the each array element coil of annular flexible array electric magnetic probe group (6) (7) in tubular type electromagnetism integrated sensor (1) is identical, electromagnetic detection instrument (3) does not record these secondary reflection field signals and detects data, when the secondary reflection field signal intensity that collects respectively when the each array element coil of annular flexible array electric magnetic probe group (6) (7) in tubular type electromagnetism integrated sensor (1) is not identical, illustrate that surveying large metal worn particle (22) stray circle cast electromagnetism integrated sensor (1) axis has passed through annular flexible array electric magnetic probe group (6), the difference of the secondary reflection field signal intensity that the each array element coil of electromagnetic detection instrument (3) analytic record (7) collects respectively, difference is converted to the modified value of the large metal worn particle of corresponding actual measurement (22) quality, and survey large metal worn particle (22) by this modified value correction and depart from the detection data bigger than normal that produce when jacket-type differential electromagnetic magnetic test coil group (5) is passed through in axis, and by described relation curve, obtain the numerical value of the quality of the large metal worn particle of actual measurement (22) passing through in the engine oil return pipe (18) of revised actual measurement use, this numerical value is kept in the storage medium of electromagnetic detection instrument (3),

M. within a preset time period, the numerical value of the quality to all actual measurement metal worn particle groups (20) that pass through tubular type electromagnetism integrated sensor (1) that obtain carries out accumulation calculating, obtain an accumulated value, the upper limit threshold of this accumulated value and preset known quality being demarcated to metal worn particle group (15) gross mass compares judgement, in the time that this accumulated value is more than or equal to the upper limit threshold of described known quality demarcation metal worn particle group (15) gross mass, electromagnetic detection instrument (3) sends alerting signal.

In a second embodiment, the difference of the present invention and the first embodiment is:

Further, in described calibration process first, the demarcation metal worn particle group (15) of described known material and quality can be copper, aluminium and ferrous metal abrasive particle, respectively to copper, aluminium and ferrous metal abrasive particle are carried out described step a, step b, step c, steps d, step e, step f, step g, step h, obtain respectively thus one taking signal strength data as horizontal ordinate, the numerical value of the quality of copper is the relation curve of the copper of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of aluminium is the relation curve of the aluminium of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of iron is the relation curve of the iron of ordinate, copper, the material of aluminium and iron abrasive particle is by signal phase data separation, in actual measurement process, perform step respectively i, step j, step k, step l, step m obtains surveying the detection data in the secondary reflection magnetic field of the actual measurement metal worn particle group (20) in the engine oil return pipe (18) of use, sort out the material of demarcating metal worn particle group (15) by signal phase data analysis, and respectively by the relation curve of copper of demarcating, the relation curve of aluminium and the relation curve of iron, obtain respectively the numerical value of the quality of copper, the numerical value of the numerical value of the quality of aluminium and the quality of iron, in actual measurement process, because engine components are made up of various metals, in engine fluid, can contain various metals abrasive particle, these metal worn particles of classification monitoring are for assessment engine behavior and have very important effect serviceable life.

In the 3rd embodiment, the difference of the present invention and the first embodiment is:

Further, in described actual measurement process, execution step i, step j, step k, after step l, at least two preset time periods are set in step m, in each preset time period, the numerical value of the quality to all actual measurement metal worn particle groups (20) that pass through tubular type electromagnetism integrated sensor (1) that obtain carries out accumulation calculating, thereby obtain at least two accumulated values, all accumulated values are added up to obtain total accumulated value again, the quantity divided by the preset time period by total accumulated value again, obtain average accumulated value, the upper limit threshold of demarcation metal worn particle group (15) gross mass of this average accumulated value and preset known material and quality is compared to judgement, in the time that this average accumulated value is more than or equal to the upper limit threshold of demarcation metal worn particle group (15) gross mass of described known material and quality, electromagnetic detection instrument (3) sends alerting signal, the method of multiple preset time periods of this set, can further improve monitoring accuracy.

Above-described embodiment is only used for further illustrating a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision of the present invention; but the present invention is not limited to embodiment; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all fall in the protection domain of technical solution of the present invention.

Claims

1. a device that improves engine fluid metal worn particle on-line monitoring precision, is characterized in that: device is made up of tubular type electromagnetism integrated sensor, sensor wire, electromagnetic detection instrument; Described tubular type electromagnetism integrated sensor is made up of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, sensor output multi-core socket, nonmetal pipe, metallic shield pipe, two metal adapter rings; The absolute electromagnetic detection coil of described jacket-type is made up of an outer electromagnetic detection coil that is wound around, its absolute output terminal is connected to sensor output multi-core socket, the material of the absolute electromagnetic detection coil of jacket-type is red copper enameled wire, dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require definite, and the axial cover width of the absolute electromagnetic detection coil of jacket-type is larger than the axial cover width of jacket-type differential electromagnetic magnetic test coil group; Described jacket-type differential electromagnetic magnetic test coil group is by two anti-phase connecting to form of outer winding electromagnetic detection coil, its differential output end is connected to sensor output multi-core socket, material, size, the wound convolution number of two outer winding electromagnetic detection coils are identical, material is red copper enameled wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution, precision and sensitivity require to determine; Described annular flexible array electric magnetic probe group is uniformly arranged and fixed and is formed on flexible PCB by multiple array element coils, annular flexible array electric magnetic probe group is circumferentially evenly wrapped on nonmetal pipe appearance, and the output terminal of each array element coil is connected to respectively sensor output multi-core socket by flexible PCB; The material of each array element coil, size, wound convolution number are identical, and material is red copper enameled wire or other wire, and dimensions electromagnetic detection frequency relevant with the several certificates of wound convolution and sensitivity require to formulate; The quantity of array element coil is definite according to the diameter of nonmetal pipe and accuracy of detection requirement, and nonmetal pipe diameter is larger, accuracy of detection requires the quantity of higher array element coil more; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group are fixedly wrapped in respectively between nonmetal pipe outside surface and metallic shield pipe; Described nonmetal round tube inside diameter is identical with engine oil return bore, and the length of nonmetal pipe is greater than the summation of the width of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, sensor output multi-core socket; Metallic shield length of tube is identical with nonmetal pipe length, and sensor output multi-core socket is fixed on nonmetal pipe outside surface, and penetrating metal shielded-plate tube tube wall, for connecting sensor cable; The core of sensor output multi-core socket is counted specification and is determined according to the output terminal quantity of the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group; Two described metal adapter rings are fixed on metallic shield pipe two ends, and the internal diameter of metal adapter ring is identical with the external diameter of engine oil return pipe, and metal adapter ring inside surface has screw thread, for connecting engine scavenge pipe; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group, nonmetal pipe, metallic shield pipe, two metal adapter rings are coaxial.

2. a method that improves engine fluid metal worn particle on-line monitoring precision, is characterized in that: described monitoring method comprises demarcates and survey two processes first;

B. allow the demarcation metal worn particle group's of containing known material and quality model engine fluid with constant speed by the tubular type electromagnetism integrated sensor of described demarcation use, described known material and the demarcation metal worn particle group of quality contain that material is identical, evenly close minute metallic abrasive particle group and several keep at a certain distance away and quality the is larger large metal worn particle of demarcation demarcated of quality, conventionally demarcate metal worn particle group and are flowed in the axis along tubular type electromagnetism integrated sensor; Known quality is demarcated metal worn particle group will flow through the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electric magnetic probe group successively;

C. first, when the demarcation metal worn particle group of known material and quality flows through the absolute electromagnetic detection coil of jacket-type, be subject to the excitation of the transient state alternating electromagnetic field that the absolute electromagnetic detection coil of jacket-type produces and produce corresponding secondary reflection magnetic field, the absolute electromagnetic detection coil of jacket-type picks up the absolute signal in this secondary reflection magnetic field, and this absolute signal is sent to electromagnetic detection instrument; Electromagnetic detection instrument is processed into described absolute signal the detection data that become corresponding relation with this demarcation metal worn particle group's known material with known quality mean value, and show corresponding absolute signal figure or numerical value, detect data and comprise signal strength data and signal phase data, the corresponding known quality mean value of signal strength data, the corresponding known material of signal phase data;

D. subsequently, the demarcation metal worn particle group of known material and quality is in the time flowing through jacket-type differential electromagnetic magnetic test coil group, be subject to jacket-type differential electromagnetic magnetic test coil group produce transient state alternating electromagnetic field excitation and produce corresponding secondary reflection magnetic field, because jacket-type differential electromagnetic magnetic test coil group is by two anti-phase connecting to form of jacket-type electromagnetic detection coil, two transient state alternating electromagnetism field strengties that produce are identical, single spin-echo, two secondary reflection magnetic field intensitys that produced so the demarcation metal worn particle group of known material and quality encourages are identical, single spin-echo, demarcated minute metallic abrasive particle group with constant speed uniform-flow during through jacket-type differential electromagnetic magnetic test coil group when described in the demarcation metal worn particle group of known material and quality, the secondary reflection magnetic field intensity of generation is evenly unchanged, in the time that described in the demarcation metal worn particle group of known material and quality demarcated large metal worn particle and flow through jacket-type differential electromagnetic magnetic test coil group, secondary reflection magnetic field intensity increases suddenly, jacket-type differential electromagnetic magnetic test coil group is picked up the differential relatively detection signal in this secondary reflection magnetic field increasing suddenly, and this differential relatively detection signal is sent to electromagnetic detection instrument, electromagnetic detection instrument is processed into this differential relatively detection signal to have demarcated the known material of large metal worn particle with described in this demarcation metal worn particle group and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential relatively detection signal figure, detect data and comprise signal strength data and signal phase data, the corresponding known quality of signal strength data, the corresponding known material of signal phase data,

E. next, known quality is demarcated metal worn particle group in the time flowing through annular flexible array electric magnetic probe group, known quality is demarcated metal worn particle group and is subject to the excitation of the transient state alternating electromagnetic field that in annular flexible array electric magnetic probe group, each array element coil produces and produces corresponding secondary reflection magnetic field, in annular flexible array electric magnetic probe group, each array element coil picks up corresponding secondary reflection magnetic field separately, and this secondary reflection field signal is transferred to electromagnetic detection instrument, electromagnetic detection instrument is processed into described secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle group's known quality, in the time that demarcation metal worn particle group is flowed along tubular type electromagnetism integrated sensor axis with constant speed, demarcating metal worn particle group equates with the distance between each array element coil in annular flexible array electric magnetic probe group, the each secondary reflection field signal intensity producing is identical, and electromagnetic detection instrument does not record these secondary reflection field signals and detects data, in the time flowing in the described axis of having demarcated large metal worn particle stray circle cast electromagnetism integrated sensor in demarcation metal worn particle group, it is described that to have demarcated in large metal worn particle and annular flexible array electric magnetic probe group the distance between each array element coil unequal, the each secondary reflection field signal intensity producing is not identical, the described secondary reflection field signal intensity maximum of having demarcated the nearest array element coil reception of large metal worn particle of distance, the difference of these secondary reflection field signal intensity of electromagnetic detection instrument analytic record, described in being converted to, difference demarcates the modified value of large metal worn particle quality, described in correction replacement, demarcate large metal worn particle and departed from the signal strength data bigger than normal producing when jacket-type differential electromagnetic magnetic test coil group is flowed through in axis,

H. set known material by electromagnetic detection instrument signal processing software and demarcate the upper limit threshold of metal worn particle group gross mass;

Described actual measurement process, comprises the steps:

3. a kind of method that improves engine fluid metal worn particle on-line monitoring precision according to claim 2, it is characterized in that: further, in described calibration process first, the demarcation metal worn particle group of described known material and quality can be copper, aluminium and ferrous metal abrasive particle, respectively to copper, aluminium and ferrous metal abrasive particle are carried out described step a, step b, step c, steps d, step e, step f, step g, step h, obtain respectively thus one taking signal strength data as horizontal ordinate, the numerical value of the quality of copper is the relation curve of the copper of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of aluminium is the relation curve of the aluminium of ordinate, article one, taking signal strength data as horizontal ordinate, the numerical value of the quality of iron is the relation curve of the iron of ordinate, copper, the material of aluminium and iron abrasive particle is by signal phase data separation, in actual measurement process, perform step respectively the detection data in the secondary reflection magnetic field of the actual measurement metal worn particle group in the engine oil return pipe that i, step j, step k, step l, step m obtain surveying use, sort out the material of demarcating metal worn particle group by signal phase data analysis, and respectively by relation curve, the relation curve of aluminium and the relation curve of iron of copper of demarcating, obtain respectively numerical value, the numerical value of quality of aluminium and the numerical value of the quality of iron of the quality of copper.

4. a kind of method that improves engine fluid metal worn particle on-line monitoring precision according to claim 2, it is characterized in that: further, in described actual measurement process, execution step i, step j, step k, after step l, at least two preset time periods are set in step m, in each preset time period, the numerical value of the quality to all actual measurement metal worn particle groups that pass through tubular type electromagnetism integrated sensor that obtain carries out accumulation calculating, thereby obtain at least two accumulated values, all accumulated values are added up to obtain total accumulated value again, the quantity divided by the preset time period by total accumulated value again, obtain average accumulated value, the upper limit threshold of the demarcation metal worn particle group gross mass of this average accumulated value and preset known material and quality is compared to judgement, in the time that this average accumulated value is more than or equal to the upper limit threshold of demarcation metal worn particle group gross mass of described known material and quality, electromagnetic detection instrument sends alerting signal.