CN102818754A

CN102818754A - Method and device of improving online monitoring accuracy of engine oil metal abrasive particles

Info

Publication number: CN102818754A
Application number: CN2012103267443A
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: 2012-12-12
Anticipated expiration: 2032-09-06
Also published as: CN102818754B

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 being converted into of other form another kind of 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 or the like.Engine belongs to " heart " parts in the transport facility; The working condition of engine will directly have influence on going and safety of transport facility; If the building block of engine has in use produced bigger wearing and tearing, will have influence on the operate as normal of engine, therefore; The state of wear of engine is monitored and fault diagnosis, could ensure the operate as normal of engine.In the prior art; The state of wear of engine detected normally adopt the fluid detection method; The fluid detection method is a kind of method of under the situation of the engine that do not disintegrate, the engine scuffing situation being monitored; It carries out analysis and judgement through the lubricating oil that extracts in the engine to the engine scuffing state, and the fluid detection method of prior art mainly contains fluid spectroscopic analysis methods and fluid method for analyzing iron spectrum.In two kinds of above-mentioned methods; No matter be that is a kind of; All need from engine, extract lubricating oil, and then in the laboratory metal worn particle in the lubricating oil that extracts analyzed, belong to offline inspection engine fluid; The sense cycle of this offline inspection mode is long, can not in time find the potential safety hazard that engine exists.Online electromagnetism oil liquid monitoring device detection speed is fast, is easy to realize dynamic monitoring, external at present existing a spot of online electromagnetic detection and method; But installation method is comparatively single; Mostly the electromagnetic detection sensor that is designed is single magnetic test coil, because the common working environment of engine is comparatively abominable, therefore; There are normal wearing and tearing; Promptly produce minute abrasive crowd relatively uniformly, and absolute electromagnetic detection coil can detect the minute metallic abrasive particle crowd's who passes through continuously change in concentration, this point does not embody in existing square law device; The differential electromagnetic magnetic test coil is high than absolute type to the detection sensitivity of big metal worn particle (for example greater than 100 μ m); Antijamming capability is stronger simultaneously, because the 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 the electromagnetic detection appearance; 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 is very big with the undesired signal difference, and differential electromagnetic magnetic test coil group of received also transfers to the secondary reflection field signal of the actual measurement metal worn particle generation of electromagnetic detection appearance, in electromagnetic detection appearance impedance plane display mode, is the detection signal figure of similar 8 fonts; The i.e. figures of two intensity is identical, phase place is opposite signal splicings; And 8 font signal graphs of above-mentioned symmetry can not appear in undesired signal, and the electromagnetic detection appearance can be discerned differentiation through the mode that the warning gate is set, but depart from engine scavenge pipe axis when flowing when the part metals abrasive particle; Because the influence of eddy effect; Detection signal can be bigger than normal, causes erroneous judgement, influences the operate as normal of engine; Owing to many reasons such as above-mentioned, online electromagnetism oil liquid monitoring device can't really be applied so far.

Summary of the invention

The objective 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 monitoring device that can improve integrated absolute Electromagnetic Testing Technology, differential electromagnetic detection technique and the array Electromagnetic Testing Technology of metal worn particle line dynamic monitoring accuracy in the engine fluid; Adopt the integrated combine detection mode of absolute electromagnetic detection, differential electromagnetic detection and array electromagnetic detection that the metal worn particle in the engine fluid is carried out the line dynamic monitoring,, set up associated databases with the mode of " memory " characteristic signal; The various form differences, became uneven, the different metal worn particle of material that pass through in the comparison scavenge pipe in real time; Through sorting and analysis, in time judge the abrasion condition of engine, to determine whether to produce alerting signal to various metal worn particles; Thereby can eliminate the potential safety hazard that the wearing and tearing owing to engine exist in time, guarantee the operate as normal of engine.

The technical solution adopted for the present invention to solve the technical problems is: a kind of method and 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 appearance; Said 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 electromagnetic 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, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group fixedly are wrapped in respectively between nonmetal pipe outside surface and the metallic shield pipe; Said nonmetal round tube inside diameter is identical with engine scavenge pipe internal diameter, 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 electromagnetic probe group, sensor output multi-core socket; The 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, is used to connect sensor wire; The core of sensor output multi-core socket is counted specification and is confirmed 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 electromagnetic probe group; Said monitoring method comprises demarcates and surveys two processes first.Described two 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 scavenge pipe, and metal adapter ring inside surface has screw thread, is used to connect the engine scavenge pipe; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group, nonmetal pipe, metallic shield pipe, two metal adapter rings are coaxial.The absolute electromagnetic detection coil of described jacket-type is made up of an outer electromagnetic detection coil that twines; Its absolute output terminal is connected to sensor output multi-core socket; The material of the absolute electromagnetic detection coil of jacket-type is the red copper enameled wire; The relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm that the axial cover width of the absolute electromagnetic detection coil of the jacket-type generally axial cover width than jacket-type differential electromagnetic magnetic test coil group is big.Described jacket-type differential electromagnetic magnetic test coil group is connected to form by the anti-phase of two outer winding electromagnetic detection coils; Its differential output end is connected to sensor output multi-core socket; Two outer material, size, wound convolutions that twine the electromagnetic detection coil count up to identical entirely; Material is the red copper enameled wire, and the relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm.Described annular flexible array electromagnetic probe group is uniformly arranged and fixed by a plurality of array element coils and on flexible PCB, forms; Annular flexible array electromagnetic probe group circumferentially evenly is wrapped on nonmetal pipe appearance, and the output terminal of each array element coil is connected to sensor output multi-core socket respectively through flexible PCB; The material of each array element coil, size, wound convolution count up to identical entirely, and material is red copper enameled wire or other lead, and relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions and sensitivity require to formulate; The quantity of array element coil requires to confirm that according to the diameter and the accuracy of detection of nonmetal pipe nonmetal pipe diameter is bigger, accuracy of detection requires the quantity of high more array element coil many more.

Said monitoring method comprises demarcates and surveys two processes first.

When operative installations first, need demarcate, calibration process comprises the steps:

A. the two ends with tubular type electromagnetism integrated sensor are connected and fixed with the engine oil return pipe of demarcating usefulness; Connect tubular type electromagnetism integrated sensor and electromagnetic detection appearance with sensor wire; Open the electromagnetic detection appearance; The absolute electromagnetic detection coil of the jacket-type of electromagnetic detection appearance in tubular type electromagnetism integrated sensor; Jacket-type differential electromagnetic magnetic test coil group; Annular flexible array electromagnetic probe group applies the pulse excitation signal of predetermined frequency, makes the absolute electromagnetic detection coil of jacket-type in the tubular type electromagnetism integrated sensor; Jacket-type differential electromagnetic magnetic test coil group; Annular flexible array electromagnetic probe group produces corresponding transient state alternating electromagnetic field respectively;

B. let the demarcation metal worn particle crowd's of containing known material and quality model engine fluid with the tubular type electromagnetism integrated sensor of constant speed through said demarcation usefulness; The demarcation metal worn particle crowd of described known material and quality contains small demarcation metal worn particle crowd that material is identical, quality is evenly close and the big metal worn particle of demarcation that several keep at a certain distance away and quality is bigger, and demarcating the metal worn particle crowd usually will flow along the axis of tubular type electromagnetism integrated sensor; Known quality is demarcated the metal worn particle crowd will flow through the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group successively;

C. at first; When the demarcation metal worn particle crowd of known material and quality flows through the absolute electromagnetic detection coil of jacket-type; Receive 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 the electromagnetic detection appearance; The electromagnetic detection appearance is processed into said absolute signal the detection data that become corresponding relation with this demarcation metal worn particle crowd'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 speaking, minute metallic abrasive particle crowd is even relatively when mobile in the fluid, and the absolute electromagnetic detection coil of jacket-type can detect it; And the number of big metal worn particle is less relatively, so can be known by 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 crowd, and jacket-type differential electromagnetic magnetic test coil group aims at and detects big metal worn particle, and annular flexible array electromagnetic probe group is used for revising the detection data of differential winding;

D. subsequently; The demarcation metal worn particle crowd of known material and quality is when flowing through jacket-type differential electromagnetic magnetic test coil group; Receive the excitation of the transient state alternating electromagnetic field that jacket-type differential electromagnetic magnetic test coil group produces and produce corresponding secondary reflection magnetic field; Because jacket-type differential electromagnetic magnetic test coil group is to be connected to form by the anti-phase of two jacket-type electromagnetic detection coils; Transient state alternating electromagnetism field strength is identical, phase place is opposite for two of being produced, and the secondary reflection magnetic field intensity is identical, phase place is opposite for two of being produced so the demarcation metal worn particle crowd of known material and quality encourages; When the said demarcation minute metallic abrasive particle crowd among the demarcation metal worn particle crowd of known material and quality evenly flows through jacket-type differential electromagnetic magnetic test coil group with constant speed, the even no change of secondary reflection magnetic field intensity of generation; When said among the demarcation metal worn particle crowd of known material and quality demarcated big metal worn particle and flow through jacket-type differential electromagnetic magnetic test coil group; The 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 that increases suddenly, and should be sent to the electromagnetic detection appearance by differential relatively detection signal; The electromagnetic detection appearance will this differential relatively detection signal be processed into this demarcations metal worn particle crowd in saidly demarcated the known material of big metal worn particle and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential comparison 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 the metal worn particle crowd when flowing through annular flexible array electromagnetic probe group; Known quality is demarcated the metal worn particle crowd and is received the excitation of the transient state alternating electromagnetic field that each array element coil produces in the annular flexible array electromagnetic probe group and produce corresponding secondary reflection magnetic field; Each array element coil picks up corresponding secondary reflection magnetic field separately in the annular flexible array electromagnetic probe group; And this secondary reflection field signal transferred to the electromagnetic detection appearance, the electromagnetic detection appearance is processed into said secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle crowd's known quality; When demarcation metal worn particle crowd is flowed along tubular type electromagnetism integrated sensor axis with constant speed; Demarcate that the distance between each array element coil equates in metal worn particle crowd and the annular flexible array electromagnetic probe group; Each the secondary reflection field signal intensity that produces is identical, and the electromagnetic detection appearance does not write down these secondary reflection field signals and detects data; When flow in the said axis of having demarcated big metal worn particle stray circle cast electromagnetism integrated sensor in demarcating the metal worn particle crowd; It is said that to have demarcated in big metal worn particle and the annular flexible array electromagnetic probe group distance between each array element coil unequal; Each the secondary reflection field signal intensity that produces is inequality; The said secondary reflection field signal intensity maximum of having demarcated the nearest array element coil reception of big metal worn particle of distance; The difference of these secondary reflection field signal intensity of electromagnetic detection appearance analytic record; Convert difference into said modified value of having demarcated big metal worn particle quality, revise that replacement is said has demarcated big metal worn particle and depart from the signal strength data bigger than normal that produces when jacket-type differential electromagnetic magnetic test coil group is flowed through in the axis.Because secondary reflection field signal intensity is directly proportional with the size of metal worn particle and the distance between electromagnetic detection coil and the metal worn particle; The big more secondary reflection field signal of metal worn particle intensity is big more; The nearlyer secondary reflection field signal of distance between electromagnetic detection coil and metal worn particle intensity is big more; The most of metal worn particle that flows in the engine scavenge pipe can flow along the axis of engine scavenge pipe, but the engine that is kept in motion (for example aloft aircraft engine) is owing to changing translational speed and reason such as rocking, and the big metal worn particle in the engine scavenge pipe can will depart from the scavenge pipe axis and flow; Distance between big metal worn particle and the differential electromagnetic magnetic test coil group diminishes; It is big that secondary reflection field signal intensity becomes, and the electromagnetic detection appearance is a size of judging metal worn particle according to signal intensity, therefore; The big metal worn particle size that this moment, the electromagnetic detection appearance was judged will the erroneous judgement false alarm occur greater than the big metal worn particle size of reality;

F. change is constantly demarcated the numerical value of metal worn particle crowd's known quality through the known material of the engine oil returning tube of said demarcation usefulness; Repeating step b, step c, steps d, step e, thus the detection data that several different numerical with known material demarcation metal worn particle crowd's known quality become one-to-one relationship obtained;

G. by electromagnetic detection appearance signal processing software the above-mentioned numerical value that several detect data and the demarcation metal worn particle crowd's who becomes one-to-one relationship with these several detection data known quality being processed into one is horizontal ordinate with the signal strength data; The numerical value of demarcating metal worn particle crowd's quality is the relation curve of ordinate; Wherein, Smoothing processing between 2, this relation curve of electromagnetic detection appearance recorded and stored;

H. set the upper limit threshold that known material is demarcated metal worn particle crowd gross mass through electromagnetic detection appearance signal processing software.

After device operation first advancing rower is fixed; All calibrating parameters have been saved in the electromagnetic detection appearance; Tubular type electromagnetism integrated sensor in will installing afterwards is connected fixing with the engine scavenge pipe of actual measurement usefulness, the electromagnetic detection appearance is fixed in the operating personnel operating room, is monitored by operating personnel.After this detected parameters that the electromagnetic detection appearance directly calls demarcation behind each starter gear is carried out monitoring, need not usually to demarcate once more.

In the actual measurement process, comprise the steps:

I. the two ends with tubular type electromagnetism integrated sensor are connected and fixed with the engine oil return pipe of surveying usefulness; The absolute electromagnetic detection coil of the jacket-type of electromagnetic detection appearance in tubular type electromagnetism integrated sensor, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group apply the pulse excitation signal of predetermined frequency, make the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group in the tubular type electromagnetism integrated sensor produce corresponding transient state alternating electromagnetic field respectively;

J. when the electromagnetic detection appearance receives the absolute signal of the absolute electromagnetic detection coil transmission of jacket-type; Be judged to be the engine scavenge pipe of actual measurement metal worn particle crowd through actual measurement usefulness; The detection data in the secondary reflection magnetic field of reading are passed through said relation curve; Obtain surveying the numerical value of the quality of the actual measurement metal worn particle that passes through in the engine scavenge pipe of usefulness, this numerical value is kept in the storage medium of electromagnetic detection appearance; Described actual measurement metal worn particle crowd contains the big metal worn particle of actual measurement of a large amount of actual measurement minute metallic abrasive particle crowds and a spot of big quality, and surveying the metal worn particle crowd usually will flow along the axis of tubular type electromagnetism integrated sensor;

K. when the electromagnetic detection appearance receives the differential comparison signal of jacket-type differential electromagnetic magnetic test coil group transmission; Be judged to be the engine scavenge pipe of the big metal worn particle of actual measurement through actual measurement usefulness; The detection data in the secondary reflection magnetic field of reading are passed through said relation curve; Obtain surveying the numerical value of the quality of the big metal worn particle of actual measurement that passes through in the engine scavenge pipe of usefulness, this numerical value is kept in the storer of electromagnetic detection appearance;

When the secondary reflection field signal intensity that l. collects respectively when annular each the array element coil of flexible array electromagnetic probe group in the tubular type electromagnetism integrated sensor was identical, the electromagnetic detection appearance did not write down these secondary reflection field signals and detects data; When the secondary reflection field signal intensity that collects respectively when annular each the array element coil of flexible array electromagnetic probe group in the tubular type electromagnetism integrated sensor is inequality; Explained that surveying big metal worn particle stray circle cast electromagnetism integrated sensor axis has passed through annular flexible array electromagnetic probe group; The difference of the secondary reflection field signal intensity that each array element coil of electromagnetic detection appearance analytic record collects respectively; Difference is converted into the modified value of the big metal worn particle quality of corresponding actual measurement; And survey the detection data bigger than normal that produce when big metal worn particle departs from the axis through jacket-type differential electromagnetic magnetic test coil group through this modified value correction; And through said relation curve; The numerical value of the quality of the big metal worn particle of actual measurement that obtains passing through in the engine scavenge pipe of revised actual measurement usefulness is kept at this numerical value in the storage medium of electromagnetic detection appearance;

M. in a time period of presetting; Numerical value to all actual measurement metal worn particle crowds' that pass through tubular type electromagnetism integrated sensor that obtain quality carries out accumulation calculating; Obtain an accumulated value; The upper limit threshold of this accumulated value and the known quality that presets being demarcated metal worn particle crowd gross mass compares judgement, and when this accumulated value was demarcated the upper limit threshold of metal worn particle crowd gross mass more than or equal to said known quality, the electromagnetic detection appearance sent alerting signal.

Further; In calibration process; The demarcation metal worn particle crowd of said known material and quality can be metal worn particles such as copper, aluminium and iron; Respectively execution in step b, step c, steps d, step e, step f, step g, step h, obtaining one thus respectively is that the numerical value of the quality of horizontal ordinate, copper is the relation curve of the copper of ordinate with the signal strength data, one is that the numerical value of the quality of horizontal ordinate, aluminium is the relation curve of the aluminium of ordinate with the signal strength data; Article one, the numerical value that with the signal strength data is the quality of horizontal ordinate, iron is the relation curve of the iron of ordinate, and the material of copper, aluminium and iron abrasive particle is through the signal phase data separation; In the actual measurement process; Execution in step i, step j, step k, step l, step m obtain surveying the detection data in the actual measurement metal worn particle crowd's in the engine scavenge pipe of usefulness secondary reflection magnetic field respectively; Sort out the material of demarcating the metal worn particle crowd through the signal phase data analysis; And relation curve, the relation curve of aluminium and the relation curve of iron through the copper demarcated respectively; Obtain the numerical value of quality of numerical value and iron of quality of numerical value, the aluminium of the quality of copper respectively, in the actual measurement process, because engine components are made up of various metals; Can contain multiple metal worn particle in the engine fluid, these metal worn particles of classification monitoring are for the assessment engine behavior and important effect is arranged serviceable life.

Further, be in step m, at least two time periods of presetting are set; All the numerical value of all actual measurement metal worn particle crowds' that pass through tubular type electromagnetism integrated sensor that obtain quality is carried out accumulation calculating in each time period of presetting; Thereby obtain at least two accumulated values, all accumulated values are added up to obtain total accumulated value again, again with the quantity of total accumulated value divided by the time period of presetting; Obtain average accumulated value; The upper limit threshold of this average accumulated value and the demarcation metal worn particle crowd gross mass of the known material that presets and quality is compared judgement, and when this average accumulated value during more than or equal to the upper limit threshold of the demarcation metal worn particle crowd gross mass of said known material and quality, the electromagnetic detection appearance sends alerting signal; The method of a plurality of preset time sections 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 the integrated combine detection mode of absolute electromagnetic detection, differential electromagnetic detection and array electromagnetic detection that the metal worn particle in the engine fluid is carried out the line dynamic detection; With the mode of " memory " characteristic signal, set up associated databases, compare the various form differences, became uneven, the different metal worn particle of material that pass through in the scavenge pipe in real time; Through sorting and analysis to various metal worn particles; In time judge the abrasion condition of engine, determining whether to produce alerting signal, thereby can eliminate the potential safety hazard that the wearing and tearing owing to engine exist in time.Owing to efficiently solve the problem that high temperature, vibration, external electromagnetic interference etc. influence accuracy of detection and sensitivity; Make electromechanical detection method can really be applied to the monitoring of engine fluid line dynamic; The duty of monitoring engine ensures its safe operation in real time.

Below in conjunction with embodiment the present invention is done further explain; 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.

Below in conjunction with embodiment the present invention is described further.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

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

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

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

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

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

Among the figure, 1. tubular type electromagnetism integrated sensor, 2. sensor wire, 3. electromagnetic detection appearance; 4. the absolute electromagnetic detection coil of jacket-type, 5. jacket-type differential electromagnetic magnetic test coil group, 6. annular flexible array electromagnetic probe group, 7. array element coil; 8. flexible PCB, 9. sensor output multi-core socket, 10. nonmetal pipe, 11. metallic shield pipes; 12. the metal adapter ring, 13. demarcate the engine scavenge pipe of usefulness, 14. model engine fluid, and 15. demarcate the metal worn particle crowd; 16. demarcated minute metallic abrasive particle crowd, 17. have demarcated big metal worn particle, the engine scavenge pipe of 18. actual measurement usefulness, 19. actual measurement engine fluid; 20. actual measurement metal worn particle crowd, 21. actual measurement minute metallic abrasive particle crowds, the big metal worn particle of 22. actual measurements.

Embodiment

In Fig. 1, Fig. 2, first embodiment shown in Figure 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 appearance (3); Said 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 electromagnetic 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), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electromagnetic probe group (6) fixedly are wrapped in respectively between nonmetal pipe (10) outside surface and the metallic shield pipe (11); Said nonmetal pipe (10) internal diameter and engine scavenge 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 electromagnetic 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, is used to connect sensor wire (2); The core of sensor output multi-core socket (9) is counted specification and is confirmed 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 electromagnetic probe group (6); Said monitoring method comprises demarcates and surveys two processes first.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 scavenge pipe (13,18) is identical, and metal adapter ring (12) inside surface has screw thread; Be used to connect 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 electromagnetic probe group (6), nonmetal pipe (10), metallic shield pipe (11), two metal adapter rings (12) are coaxial.The absolute electromagnetic detection coil of described jacket-type (4) is made up of an outer electromagnetic detection coil that twines; 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 the red copper enameled wire; The relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm that the axial cover width of the absolute electromagnetic detection coil of jacket-type (4) the generally axial cover width than jacket-type differential electromagnetic magnetic test coil group (5) is big.Described jacket-type differential electromagnetic magnetic test coil group (5) is connected to form by the anti-phase of two outer winding electromagnetic detection coils; Its differential output end is connected to sensor output multi-core socket (9); Two outer material, size, wound convolutions that twine the electromagnetic detection coil count up to identical entirely; Material is the red copper enameled wire, and the relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm.Described annular flexible array electromagnetic probe group (6) is uniformly arranged and fixed by a plurality of array element coils (7) and on flexible PCB (8), forms; Annular flexible array electromagnetic probe group (6) circumferentially evenly is wrapped on nonmetal pipe (10) appearance, and the output terminal of each array element coil (7) is connected to sensor output multi-core socket (9) respectively through flexible PCB (8); Material, size, the wound convolution of each array element coil (7) counts up to identical entirely, and material is red copper enameled wire or other lead, and relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions and sensitivity require to formulate; The quantity of array element coil (7) requires to confirm that according to the diameter and the accuracy of detection of nonmetal pipe (10) nonmetal pipe (10) diameter is bigger, accuracy of detection requires the quantity of high more array element coil (7) many more.

Said a kind of method that improves metal worn particle line dynamic monitoring accuracy in the engine fluid comprises and demarcates and survey two processes first.

Among first embodiment shown in Figure 4, calibration process comprises the steps:

A. the two ends with tubular type electromagnetism integrated sensor (1) are connected fixing with the engine scavenge pipe (13) of demarcating usefulness; Connect tubular type electromagnetism integrated sensor (1) and electromagnetic detection appearance (3) with sensor wire (2); Open electromagnetic detection appearance (3); The absolute electromagnetic detection coil of the jacket-type of electromagnetic detection appearance (3) in tubular type electromagnetism integrated sensor (1) (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electromagnetic probe group (6) apply the pulse excitation signal of predetermined frequency, make the absolute electromagnetic detection coil of jacket-type (4), jacket-type differential electromagnetic magnetic test coil group (5), annular flexible array electromagnetic probe group (6) in the tubular type electromagnetism integrated sensor (1) produce corresponding transient state alternating electromagnetic field respectively;

B. let the demarcation metal worn particle crowd's (15) of containing known material and quality model engine fluid (14) with the tubular type electromagnetism integrated sensor (1) of constant speed through said demarcation usefulness; The demarcation metal worn particle crowd (15) of described known material and quality contains the minute metallic of demarcation abrasive particle crowd (16) that material is identical, quality is evenly close and the big metal worn particle of demarcation (17) that several keep at a certain distance away and quality is bigger, and demarcating metal worn particle crowd (15) usually will flow along the axis of tubular type electromagnetism integrated sensor (1); Known quality is demarcated metal worn particle crowd (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 electromagnetic probe group (6) successively;

C. at first; When the demarcation metal worn particle crowd (15) of known material and quality flows through the absolute electromagnetic detection coil of jacket-type (4); Receive the excitation of the transient state alternating electromagnetic field that the absolute electromagnetic detection coil of jacket-type (4) produces 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 appearance (3); Electromagnetic detection appearance (3) is processed into said absolute signal the detection data that become corresponding relation with this demarcation metal worn particle crowd'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 crowd (15) of known material and quality is when flowing through jacket-type differential electromagnetic magnetic test coil group (5); Receive the excitation of the transient state alternating electromagnetic field that jacket-type differential electromagnetic magnetic test coil group (5) produces and produce corresponding secondary reflection magnetic field; Because jacket-type differential electromagnetic magnetic test coil group (5) is to be connected to form by the anti-phase of two jacket-type electromagnetic detection coils; Transient state alternating electromagnetism field strength is identical, phase place is opposite for two of being produced, and the secondary reflection magnetic field intensity is identical, phase place is opposite for two of being produced so the demarcation metal worn particle crowd (15) of known material and quality encourages; When said among the demarcation metal worn particle crowd of known material and quality demarcated minute metallic abrasive particle crowd (16) when evenly flowing through jacket-type differential electromagnetic magnetic test coil group (5) with constant speed, the even no change of secondary reflection magnetic field intensity of generation; When said among the demarcation metal worn particle crowd (15) of known material and quality demarcated big metal worn particle (17) and flow through jacket-type differential electromagnetic magnetic test coil group (5); The 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 that increases suddenly, and should be sent to electromagnetic detection appearance (3) by differential relatively detection signal; Electromagnetic detection appearance (3) will this differential relatively detection signal be processed into this demarcations metal worn particle crowd (15) in saidly demarcated the known material of big metal worn particle (17) and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential comparison 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 crowd (15) when flowing through annular flexible array electromagnetic probe group (6); Known quality is demarcated metal worn particle crowd (15) and is received the excitation of the transient state alternating electromagnetic field that each array element coil (7) produces in the annular flexible array electromagnetic probe group (6) and produce corresponding secondary reflection magnetic field; Each array element coil (7) picks up corresponding secondary reflection magnetic field separately in the annular flexible array electromagnetic probe group (6); And this secondary reflection field signal transferred to electromagnetic detection appearance (3), electromagnetic detection appearance (3) is processed into said secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle crowd's (15) known quality; When demarcation metal worn particle crowd (15) is flowed along tubular type electromagnetism integrated sensor (1) axis with constant speed; Demarcate that the distance between each array element coil (7) equates in metal worn particle crowd (15) and the annular flexible array electromagnetic probe group (6); Each the secondary reflection field signal intensity that produces is identical, and electromagnetic detection appearance (3) does not write down these secondary reflection field signals and detects data; When flow in the said axis of having demarcated big metal worn particle (17) stray circle cast electromagnetism integrated sensor (1) in demarcating metal worn particle crowd (15); It is said that to have demarcated in big metal worn particle (17) and the annular flexible array electromagnetic probe group (6) distance between each array element coil (7) unequal; Each the secondary reflection field signal intensity that produces is inequality; The said secondary reflection field signal intensity maximum of having demarcated nearest array element coil (7) reception of big metal worn particle (17) of distance; The difference of these secondary reflection field signal intensity of electromagnetic detection appearance (3) analytic record; Convert difference into said modified value of having demarcated big metal worn particle (17) quality, revise the said big metal worn particle (17) of having demarcated of replacement and depart from the signal strength data bigger than normal that produces when jacket-type differential electromagnetic magnetic test coil group (4) is flowed through in the axis;

F. change is constantly demarcated the numerical value of metal worn particle crowd's (15) known quality through the known material of the engine oil returning tube (13) of said demarcation usefulness; Repeating step b, step c, steps d, step e, thus the detection data that several different numerical with known material demarcation metal worn particle crowd's (15) known quality become one-to-one relationship obtained;

G. by electromagnetic detection appearance (3) signal processing software the above-mentioned numerical value that several detect data and the demarcation metal worn particle crowd's (15) who becomes one-to-one relationship with these several detection data known quality being processed into one is horizontal ordinate with the signal strength data; The numerical value of demarcating metal worn particle crowd's (15) quality is the relation curve of ordinate; Wherein, Smoothing processing between 2, this relation curve of electromagnetic detection appearance (3) recorded and stored;

H. set the upper limit threshold that known material is demarcated metal worn particle crowd (15) gross mass through electromagnetic detection appearance (3) signal processing software.

After device operation first advancing rower is fixed; All calibrating parameters have been saved in the electromagnetic detection appearance (3); Tubular type electromagnetism integrated sensor (1) in will installing afterwards is connected fixing with the engine scavenge pipe (18) of actual measurement usefulness; Electromagnetic detection appearance (3) is fixed in the operating personnel operating room, is monitored by operating personnel.After this detected parameters that electromagnetic detection appearance (3) directly calls demarcation behind each starter gear is carried out monitoring, need not usually to demarcate once more.

Among first embodiment shown in Figure 5, the actual measurement process comprises the steps:

I. the two ends with tubular type electromagnetism integrated sensor (1) are connected and fixed with the engine oil return pipe (18) of surveying usefulness; The absolute electromagnetic detection coil of the jacket-type of electromagnetic detection appearance (3) in tubular type electromagnetism integrated sensor (1) (4); Jacket-type differential electromagnetic magnetic test coil group (5); Annular flexible array electromagnetic probe group (6) applies the pulse excitation signal of predetermined frequency, makes the absolute electromagnetic detection coil of jacket-type (4) in the tubular type electromagnetism integrated sensor (1); Jacket-type differential electromagnetic magnetic test coil group (5); Annular flexible array electromagnetic probe group (6) produces corresponding transient state alternating electromagnetic field respectively;

J. when electromagnetic detection appearance (3) receives the absolute signal of the absolute electromagnetic detection coil of jacket-type (4) transmission; Be judged to be the engine scavenge pipe (18) of actual measurement metal worn particle crowd (20) through actual measurement usefulness; The detection data in the secondary reflection magnetic field of reading are passed through said relation curve; Obtain surveying the numerical value of the quality of the actual measurement metal worn particle (20) that passes through in the engine scavenge pipe (18) of usefulness, this numerical value is kept in the storage medium of electromagnetic detection appearance (3); Described actual measurement metal worn particle crowd (20) contains the big metal worn particle of actual measurement (22) of a large amount of actual measurement minute metallic abrasive particle crowds (21) and a spot of big quality, and surveying metal worn particle crowd (20) usually will flow along the axis of tubular type electromagnetism integrated sensor (1);

K. when electromagnetic detection appearance (3) receives the differential comparison signal of jacket-type differential electromagnetic magnetic test coil group (5) transmission; Be judged to be the engine scavenge pipe (18) of the big metal worn particle of actual measurement (22) through actual measurement usefulness; The detection data in the secondary reflection magnetic field of reading are passed through said relation curve; Obtain surveying the numerical value of the quality of the big metal worn particle of actual measurement (22) that passes through in the engine scavenge pipe (18) of usefulness, this numerical value is kept in the storer of electromagnetic detection appearance (3);

When the secondary reflection field signal intensity that l. collects respectively when each array element coil (7) of the annular flexible array electromagnetic probe group (6) in the tubular type electromagnetism integrated sensor (1) was identical, electromagnetic detection appearance (3) did not write down these secondary reflection field signals and detects data; When the secondary reflection field signal intensity that collects respectively when each array element coil (7) of the annular flexible array electromagnetic probe group (6) in the tubular type electromagnetism integrated sensor (1) is inequality; Explained that surveying big metal worn particle (22) stray circle cast electromagnetism integrated sensor (1) axis has passed through annular flexible array electromagnetic probe group (6); The difference of the secondary reflection field signal intensity that each array element coil (7) of electromagnetic detection appearance (3) analytic record collects respectively; Difference is converted into the modified value of the big metal worn particle of corresponding actual measurement (22) quality; And survey big metal worn particle (22) through 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 the axis; And through said relation curve; The numerical value of the quality of the big metal worn particle of actual measurement (22) that obtains passing through in the engine scavenge pipe (18) of revised actual measurement usefulness is kept at this numerical value in the storage medium of electromagnetic detection appearance (3);

M. in a time period of presetting; Numerical value to all actual measurement metal worn particle crowds' (20) that pass through tubular type electromagnetism integrated sensor (1) that obtain quality carries out accumulation calculating; Obtain an accumulated value; The upper limit threshold that this accumulated value and the known quality that presets are demarcated metal worn particle crowd (15) gross mass compares judgement; When this accumulated value was demarcated the upper limit threshold of metal worn particle crowd (15) gross mass more than or equal to said known quality, electromagnetic detection appearance (3) sent alerting signal.

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

Further; In calibration process; The demarcation metal worn particle crowd (15) of said known material and quality can be metal worn particles such as copper, aluminium and iron; Respectively execution in step b, step c, steps d, step e, step f, step g, step h, obtaining one thus respectively is that the numerical value of the quality of horizontal ordinate, copper is the relation curve of the copper of ordinate with the signal strength data, one is that the numerical value of the quality of horizontal ordinate, aluminium is the relation curve of the aluminium of ordinate with the signal strength data; Article one, the numerical value that with the signal strength data is the quality of horizontal ordinate, iron is the relation curve of the iron of ordinate, and the material of copper, aluminium and iron abrasive particle is through the signal phase data separation; In the actual measurement process; Execution in step i, step j, step k, step l, step m obtain surveying the detection data in the actual measurement metal worn particle crowd's (20) in the engine scavenge pipe (18) of usefulness secondary reflection magnetic field respectively; Sort out the material of demarcating metal worn particle crowd (15) through the signal phase data analysis; And relation curve, the relation curve of aluminium and the relation curve of iron through the copper demarcated respectively; Obtain the numerical value of quality of numerical value and iron of quality of numerical value, the aluminium of the quality of copper respectively, in the actual measurement process, because engine components are made up of various metals; Can contain multiple metal worn particle in the engine fluid, these metal worn particles of classification monitoring are for the assessment engine behavior and important effect is arranged serviceable life.

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

Further; Be in step m; At least two time periods of presetting are set, all the numerical value of all actual measurement metal worn particle crowds' (20) that pass through tubular type electromagnetism integrated sensor (1) that obtain quality are carried out accumulation calculating, thereby obtain at least two accumulated values in each time period of presetting; All accumulated values are added up to obtain total accumulated value again; With the quantity of total accumulated value, obtain average accumulated value again, the upper limit threshold of this average accumulated value and demarcation metal worn particle crowd (15) gross mass of the known material that presets and quality is compared judgement divided by the time period of presetting; When this average accumulated value during more than or equal to the upper limit threshold of demarcation metal worn particle crowd (15) gross mass of said known material and quality; Electromagnetic detection appearance (3) sends alerting signal, and the method for a plurality of preset time sections of this set can further improve monitoring accuracy.

Claims

1. a method and a device that improves engine fluid metal worn particle on-line monitoring precision is characterized in that: install and be made up of tubular type electromagnetism integrated sensor, sensor wire, electromagnetic detection appearance; Said 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 electromagnetic 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, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group fixedly are wrapped in respectively between nonmetal pipe outside surface and the metallic shield pipe; Said nonmetal round tube inside diameter is identical with engine scavenge pipe internal diameter, 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 electromagnetic probe group, sensor output multi-core socket; The 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, is used to connect sensor wire; The core of sensor output multi-core socket is counted specification and is confirmed 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 electromagnetic probe group; Said monitoring method comprises demarcates and surveys two processes first.

2. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: described two metal adapter rings are fixed on metallic shield pipe two ends; The internal diameter of metal adapter ring is identical with the external diameter of engine scavenge pipe; Metal adapter ring inside surface has screw thread, is used to connect the engine scavenge pipe; The absolute electromagnetic detection coil of described jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group, nonmetal pipe, metallic shield pipe, two metal adapter rings are coaxial.

3. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: the absolute electromagnetic detection coil of described jacket-type is made up of an outer electromagnetic detection coil that twines; Its absolute output terminal is connected to sensor output multi-core socket; The material of the absolute electromagnetic detection coil of jacket-type is the red copper enameled wire; The relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm that the axial cover width of the absolute electromagnetic detection coil of the jacket-type generally axial cover width than jacket-type differential electromagnetic magnetic test coil group is big.

4. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: described jacket-type differential electromagnetic magnetic test coil group is connected to form by the anti-phase of two outer winding electromagnetic detection coils; Its differential output end is connected to sensor output multi-core socket; Two outer material, size, wound convolutions that twine the electromagnetic detection coil count up to identical entirely; Material is the red copper enameled wire, and the relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions, precision and sensitivity require to confirm.

5. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: described annular flexible array electromagnetic probe group is uniformly arranged and fixed by a plurality of array element coils and on flexible PCB, forms; Annular flexible array electromagnetic probe group circumferentially evenly is wrapped on nonmetal pipe appearance, and the output terminal of each array element coil is connected to sensor output multi-core socket respectively through flexible PCB; The material of each array element coil, size, wound convolution count up to identical entirely, and material is red copper enameled wire or other lead, and relevant electromagnetic detection frequency with the several certificates of wound convolution of dimensions and sensitivity require to formulate; The quantity of array element coil requires to confirm that according to the diameter and the accuracy of detection of nonmetal pipe nonmetal pipe diameter is bigger, accuracy of detection requires the quantity of high more array element coil many more.

6. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: the calibration process first in the said monitoring method does; When operative installations first, device need be demarcated, and calibration process comprises the steps:

B. let the demarcation metal worn particle crowd's of containing known material and quality model engine fluid with the tubular type electromagnetism integrated sensor of constant speed through said demarcation usefulness; The demarcation metal worn particle crowd of described known material and quality contains that material is identical, quality is evenly close demarcates minute metallic abrasive particle crowd and several keep at a certain distance away and quality the is bigger big metal worn particle of demarcation, and demarcating the metal worn particle crowd usually will flow along the axis of tubular type electromagnetism integrated sensor; Known quality is demarcated the metal worn particle crowd will flow through the absolute electromagnetic detection coil of jacket-type, jacket-type differential electromagnetic magnetic test coil group, annular flexible array electromagnetic probe group successively;

C. at first; When the demarcation metal worn particle crowd of known material and quality flows through the absolute electromagnetic detection coil of jacket-type; Receive 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 the electromagnetic detection appearance; The electromagnetic detection appearance is processed into said absolute signal the detection data that become corresponding relation with this demarcation metal worn particle crowd'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 crowd of known material and quality is when flowing through jacket-type differential electromagnetic magnetic test coil group; Receive the excitation of the transient state alternating electromagnetic field that jacket-type differential electromagnetic magnetic test coil group produces and produce corresponding secondary reflection magnetic field; Because jacket-type differential electromagnetic magnetic test coil group is to be connected to form by the anti-phase of two jacket-type electromagnetic detection coils; Transient state alternating electromagnetism field strength is identical, phase place is opposite for two of being produced, and the secondary reflection magnetic field intensity is identical, phase place is opposite for two of being produced so the demarcation metal worn particle crowd of known material and quality encourages; When said among the demarcation metal worn particle crowd of known material and quality demarcated minute metallic abrasive particle crowd when evenly flowing through jacket-type differential electromagnetic magnetic test coil group with constant speed, the even no change of secondary reflection magnetic field intensity of generation; When said among the demarcation metal worn particle crowd of known material and quality demarcated big metal worn particle and flow through jacket-type differential electromagnetic magnetic test coil group; The 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 that increases suddenly, and should be sent to the electromagnetic detection appearance by differential relatively detection signal; The electromagnetic detection appearance will this differential relatively detection signal be processed into this demarcations metal worn particle crowd in saidly demarcated the known material of big metal worn particle and the numerical value of known quality becomes the detection data of corresponding relation and shows corresponding differential comparison 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 the metal worn particle crowd when flowing through annular flexible array electromagnetic probe group; Known quality is demarcated the metal worn particle crowd and is received the excitation of the transient state alternating electromagnetic field that each array element coil produces in the annular flexible array electromagnetic probe group and produce corresponding secondary reflection magnetic field; Each array element coil picks up corresponding secondary reflection magnetic field separately in the annular flexible array electromagnetic probe group; And this secondary reflection field signal transferred to the electromagnetic detection appearance, the electromagnetic detection appearance is processed into said secondary reflection field signal the detection data that become corresponding relation with the numerical value of this demarcation metal worn particle crowd's known quality; When demarcation metal worn particle crowd is flowed along tubular type electromagnetism integrated sensor axis with constant speed; Demarcate that the distance between each array element coil equates in metal worn particle crowd and the annular flexible array electromagnetic probe group; Each the secondary reflection field signal intensity that produces is identical, and the electromagnetic detection appearance does not write down these secondary reflection field signals and detects data; When flow in the said axis of having demarcated big metal worn particle stray circle cast electromagnetism integrated sensor in demarcating the metal worn particle crowd; It is said that to have demarcated in big metal worn particle and the annular flexible array electromagnetic probe group distance between each array element coil unequal; Each the secondary reflection field signal intensity that produces is inequality; The said secondary reflection field signal intensity maximum of having demarcated the nearest array element coil reception of big metal worn particle of distance; The difference of these secondary reflection field signal intensity of electromagnetic detection appearance analytic record; Convert difference into said modified value of having demarcated big metal worn particle quality, revise that replacement is said has demarcated big metal worn particle and depart from the signal strength data bigger than normal that produces when jacket-type differential electromagnetic magnetic test coil group is flowed through in the axis;

7. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1, it is characterized in that: the actual measurement process in the described monitoring method comprises the steps:

8. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: further; In calibration process; The demarcation metal worn particle crowd of said known material and quality can be metal worn particles such as copper, aluminium and iron; Respectively execution in step b, step c, steps d, step e, step f, step g, step h, obtaining one thus respectively is that the numerical value of the quality of horizontal ordinate, copper is the relation curve of the copper of ordinate with the signal strength data, one is that the numerical value of the quality of horizontal ordinate, aluminium is the relation curve of the aluminium of ordinate with the signal strength data; Article one, the numerical value that with the signal strength data is the quality of horizontal ordinate, iron is the relation curve of the iron of ordinate, and the material of copper, aluminium and iron abrasive particle is through the signal phase data separation; In the actual measurement process; Execution in step i, step j, step k, step l, step m obtain surveying the detection data in the actual measurement metal worn particle crowd's in the engine scavenge pipe of usefulness secondary reflection magnetic field respectively; Sort out the material of demarcating the metal worn particle crowd through the signal phase data analysis; And, obtain the numerical value of quality of numerical value and iron of quality of numerical value, the aluminium of the quality of copper respectively respectively through relation curve, the relation curve of aluminium and the relation curve of iron of the copper demarcated.

9. a kind of method and device that improves engine fluid metal worn particle on-line monitoring precision according to claim 1; It is characterized in that: further; Be in step m; At least two time periods of presetting are set, all the numerical value of all actual measurement metal worn particle crowds' that pass through tubular type electromagnetism integrated sensor that obtain quality are carried out accumulation calculating, thereby obtain at least two accumulated values in each time period of presetting; All accumulated values are added up to obtain total accumulated value again; With the quantity of total accumulated value, obtain average accumulated value again, the upper limit threshold of this average accumulated value and the demarcation metal worn particle crowd gross mass of the known material that presets and quality is compared judgement divided by the time period of presetting; When this average accumulated value during more than or equal to the upper limit threshold of the demarcation metal worn particle crowd gross mass of said known material and quality, the electromagnetic detection appearance sends alerting signal.