CN105891057A - Double-excitation solenoid type particle sensitive detection device adopting full-band filtering - Google Patents
Double-excitation solenoid type particle sensitive detection device adopting full-band filtering Download PDFInfo
- Publication number
- CN105891057A CN105891057A CN201610311409.4A CN201610311409A CN105891057A CN 105891057 A CN105891057 A CN 105891057A CN 201610311409 A CN201610311409 A CN 201610311409A CN 105891057 A CN105891057 A CN 105891057A
- Authority
- CN
- China
- Prior art keywords
- module
- solenoid
- wall
- excitation
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 239000002245 particle Substances 0.000 title abstract description 52
- 238000011896 sensitive detection Methods 0.000 title abstract 2
- 230000005291 magnetic effect Effects 0.000 claims abstract description 93
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 230000006698 induction Effects 0.000 claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 230000005284 excitation Effects 0.000 claims description 76
- 239000012530 fluid Substances 0.000 claims description 57
- 239000010410 layer Substances 0.000 claims description 47
- 239000004531 microgranule Substances 0.000 claims description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 41
- 229910052782 aluminium Inorganic materials 0.000 claims description 41
- 230000002441 reversible effect Effects 0.000 claims description 41
- 238000004804 winding Methods 0.000 claims description 40
- 238000013016 damping Methods 0.000 claims description 39
- 230000035945 sensitivity Effects 0.000 claims description 35
- 238000001179 sorption measurement Methods 0.000 claims description 35
- 238000000465 moulding Methods 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 21
- 239000000084 colloidal system Substances 0.000 claims description 21
- 229910052742 iron Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims 1
- 229910021426 porous silicon Inorganic materials 0.000 claims 1
- 230000005415 magnetization Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract 2
- 230000008859 change Effects 0.000 description 22
- 230000000694 effects Effects 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 230000005294 ferromagnetic effect Effects 0.000 description 16
- 230000010349 pulsation Effects 0.000 description 15
- 230000033001 locomotion Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000002923 metal particle Substances 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- 239000008187 granular material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000003302 ferromagnetic material Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009527 percussion Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000010721 machine oil Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000009828 non-uniform distribution Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000005408 paramagnetism Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0019—Means for transferring or separating particles prior to analysis, e.g. hoppers or particle conveyors
Landscapes
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention relates to a double-excitation solenoid type particle sensitive detection device adopting full-band filtering. The device is arranged on a hydraulic pipeline, and comprises a filter, a separation and absorption module, a rotary shaping module, an exciting coil I, an induction coil and an exciting coil II which are sequentially arranged on the hydraulic pipeline; the exciting coil I and the exciting coil II are in series-opposing connection; the induction coil is positioned in the center of a part between the exciting coil I and the exciting coil II; an electronic control unit (ECU) is respectively and electrically connected with and used for controlling the filter, the separation and absorption module, the rotary shaping module, the exciting coil I, the exciting coil II and the induction coil; a full-band filter is adopted as the filter; the separation and absorption module consists of a mechanical centrifugal module, a magnetization module, a magnetic absorption module, an electrification module and an electric absorption module which are sequentially connected. The double-excitation solenoid type online wear particle detection system adopts a non-contact measurement way, and has the advantages of being good in signal consistency, high in reliability, strong in detection signals, low in error, and the like.
Description
[technical field]
The present invention relates to a kind of hydraulic oil wear particle detection equipment, be specifically related to a kind of bidifly using full frequency band to filter
Encourage solenoid type microgranule sensitivity detection equipment, belong to technical field of hydraulic equipment.
[background technology]
Abrasion is one of principal element of component of machine inefficacy, and wear particle is monitoring wear process and diagnosis abrasion
The most directly information word of failure type.Statistics both domestic and external show, hydraulic machinery 70% fault be derived from fluid
Grain pollutes.Therefore, the metallic wear particles in fluid is carried out on-line monitoring and has become minimizing abrasion and hydraulic system clamping card
One of important channel of puckery fault.
Inductance type transducer belongs to non-contact measurement, and in fluid, material and the quantity of contained metallic wear particles make biography
Sensor equivalent inductance changes, thus realizes the on-line monitoring of wear particle.Chinese invention patent the 201310228772.6th
Number disclosing a kind of fluid metal worn particle on-line monitoring system, this fluid metal worn particle on-line monitoring system includes sensor, micro-
Processor and circuit, its sensor is solenoid type inductance sensor.When using this system to carry out on-line monitoring, first by two
The excitation coil parallel connection of identical sensor accesses excitation AC signal generator, by two induction coil differential concatenations and with two
The big resistance of the resistance such as individual is connected into AC bridge;Then make the oil circuit of a fluid sensor from which passes through.Work as sensor
In an oil circuit containing excitation coil and induction coil by the fluid containing metal worn particle, another is obstructed out-of-date, metal
Abrasive particle affects the magnetic field intensity of sensor, destroys the balance of electric bridge, the alternating voltage of induction coil output respective magnitudes.Output electricity
Pressure size and metal worn particle concentration are directly proportional, and the metal worn particle concentration contained in fluid is the biggest, and output voltage values is the biggest.Logical
Cross system processing module to output signal collection and process, reach the purpose to fluid metal worn particle concentration on-line monitoring.
But, there is the deficiency of following several respects in above-mentioned monitoring method:
1. the magnetic fluctuation that metallic wear particles causes when flowing through test coil is the faintest, the output result of detection coil
Affected relatively big by microgranule Negotiation speed, in pipeline, pressure and the flowed fluctuation of fluid will have a strong impact on having of inductance method detection of particulates
Effect property and concordance.
2. the galling abrasive particle in machine oil can be divided into ferromagnetics microgranule (such as ferrum) and non-according to its electromagnetic property
Ferromagnetics microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalent inductance of cell winding, and non-ferromagnetic material microgranule then weakens biography
The equivalent inductance of sensor coil.When two kinds of microgranules are simultaneously by detection coil, this monitoring device will lose efficacy.
The particle diameter of metallic wear particles is less the most under normal circumstances, at about 5um, and predominantly ball milling grain, its fiber number is little
In other abrasive particles, cell winding is relatively weak to its power of test.Such as patent documentation 1, can only to process the metal of about 10um micro-
Grain, it is impossible to the premature wear of monitoring parts.
4. the magnetic induction density B in solenoid is non-uniform Distribution along its axis direction, and this will cause serious measurement by mistake
Difference;The inductance of the most same model is greater than the power of test to copper granule to the power of test of Ferrous particles, and this equally can
Bring measurement error.
Therefore, for solving above-mentioned technical problem, the double excitation using full frequency band filtering of a kind of innovation of necessary offer
Solenoid type microgranule sensitivity detection equipment, to overcome described defect of the prior art.
[summary of the invention]
For solving above-mentioned technical problem, it is an object of the invention to provide a kind of employing non-contacting metering system, signal
The double excitation solenoid type microgranule sensitivity using full frequency band filtering that concordance is good, reliability is high, detection signal is strong and error is little
Detection equipment.
For achieving the above object, the technical scheme that the present invention takes is: a kind of double excitation helical using full frequency band to filter
Tubular type microgranule sensitivity detection equipment, it is arranged on fluid pressure line, and it includes wave filter, separates adsorption module, rotates moulding mould
Block, excitation coil I, excitation coil II, induction coil and ECU;Wherein, described wave filter, separate adsorption module, rotate moulding
Module, excitation coil I, induction coil, excitation coil II are successively set on fluid pressure line;Described excitation coil I and excitation line
Circle II differential concatenation;Described induction coil central authorities between excitation coil I and excitation coil II;Described ECU is the most electrically
Connect and control wave filter, separate adsorption module, rotate moulding module, excitation coil I, excitation coil II and induction coil;Institute
State wave filter and include input pipe, shell, outlet tube, corrugated tube, elastic thin-wall and colloid damping layer;Described input pipe is connected to
One end of shell;Described outlet tube is connected to the other end of shell, and it extends in shell;Described elastic thin-wall is along the footpath of shell
In being installed on shell;Described input pipe, outlet tube and elastic thin-wall are collectively forming a K-type wave filter;Described elastic thin-wall and
The resonance cavity volume of cylinder is formed between shell;Some conical damping holes, taper is uniformly had in the axial direction of described elastic thin-wall
Damping hole connection resonance cavity volume;Described corrugated tube is wound on outside resonance cavity volume in the shape of a spiral, and resonance cavity volume is inserted by multiple tapers
Enter pipe connection;Described corrugated tube is connected by some arms between respectively enclosing, and arm is provided with switch;Described corrugated tube and resonance are held
Chamber composition plug-in type spiral isomery cascaded H mode filter;Described separation adsorption module is by the mechanical centrifugal module being sequentially connected with, magnetic
Change module, magnetic suck module, electrification module and electric adsorption module composition.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
State the axis of input pipe and outlet tube the most on the same axis;The described wider place of conical damping hole opening is positioned at resonance cavity volume,
Its taper angle is 10 °;Described taper is inserted the wider place of tube opening and is positioned at corrugated tube, and its taper angle is 10 °;Described taper is inserted
Mutually stagger in the position of pipe and conical damping hole;The internal layer of described colloid damping layer and outer layer are respectively outer layer elastic thin-wall and interior
Layer elastic thin-wall, is connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall;Described outer layer elastic thin-wall
And in the interlayer between internal layer elastic thin-wall, it is filled with the pure water adding antifreezing agent, it is suspended with Bio-sil in pure water;Described
Colloid damping layer is connected with shell near one end of outlet tube;Described colloid damping layer is provided with one and lives near one end of outlet tube
Plug.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
Stating mechanical centrifugal module uses eddy flow to be centrifuged module;Described eddy flow is centrifuged module to include eddy flow tube wall, the first flow deflector, second leads
Flow, motor and flow transducer;Wherein, described first flow deflector is provided with 3, and these 3 first flow deflectors are along tube wall
Inner periphery is uniformly distributed every 120 °, and its laying angle is set to 18 °;Described second flow deflector and the first flow deflector structure are identical, and it sets
Put after the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C;Described first
The long limit of flow deflector is connected with tube wall, and minor face extends along the axis of tube wall;Its leading edge frustrates into obtuse, and trailing edge is processed into wing, its
It is highly 0.4 times of tube wall diameter, 1.8 times of a length of tube wall diameter;Described motor connects and drives the first flow deflector
With the second flow deflector, to regulate laying angle;Described flow transducer is arranged on the central authorities in tube wall.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
State magnetized module and include aluminum matter pipeline, some windings, iron shell and flange;Wherein, described some windings are rotating around at aluminum
Outside matter pipeline;Described iron shell is coated on aluminum matter pipeline;Described flange welding is at the two ends of aluminum matter pipeline.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
Stating magnetic suck module and use homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, forward helical
Pipe, reverse solenoid and irony magnetic conduction cap;Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring shape pipeline
In, both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole;Described ferrum
Matter magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, and it is positioned at forward solenoid and reverse solenoid adjacent, Yi Jizheng
To solenoid and the intermediate point of reverse solenoid axis.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
Stating magnetic suck module and use the homopolarity adjacent type absorbing ring of charged hammer, the homopolarity adjacent type absorbing ring of this charged hammer includes aluminum
Matter circulating line, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet;Described forward spiral shell
Spool and reverse solenoid are respectively arranged in aluminium ring shape pipeline, and both are connected with electric current in opposite direction so that forward helical
Pipe and reverse solenoid adjacent produce like pole;Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, its
It is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the intermediate point of reverse solenoid axis;Described
Dividing plate is between forward solenoid and reverse solenoid;Described electric shock hammer and electric magnet are between dividing plate;Described electric magnet
Connect and electric shock hammer can be promoted, making electric shock hammer tap aluminium ring shape inner-walls of duct.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
State electrification module and include some electrodes and an electrode controller;Described some electrodes are installed on fluid pressure line, and it connects respectively
It is connected to electrode controller.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
State electric adsorption module and include aluminum matter pipeline, positive plate, minus plate and pole plate controller;Wherein, described positive plate, minus plate divide
It is not arranged on aluminum matter pipeline, and in being oppositely arranged;Described positive plate, minus plate are respectively and electrically connected on pole plate controller;
Described pole plate controller is electrically connected to ECU, and by ECU control.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is further arranged to: institute
State the moulding module of rotation and include aluminum matter pipeline, some windings, iron shell, flange and some rotations moulding electric current output mould
Block;Wherein, described some windings are rotating around outside aluminum matter pipeline;Described iron shell is coated on aluminum matter pipeline;Described flange
It is welded on the two ends of aluminum matter pipeline;The moulding current output module of each rotation is connected to a winding.
The double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention is also configured to: described sharp
Encouraging coil I and excitation coil II and all comprise some windings, each winding is made up of positive winding and inverse winding, and each winding is respectively connecting to
One exciting current output module, this exciting current output module is controlled by ECU module.
Compared with prior art, there is advantages that present invention introduces oil liquid pressure flowed fluctuation suppresses
Technology and microgranule timesharing release measure, to ensure effectiveness and the concordance of detection;By mechanical centrifugal, magnetization absorption, electrification
The technology such as absorption by ferromagnetics microgranule and non-ferromagnetic material separation of particles, affect testing result preventing two kinds of microgranules from interfering with each other;
By aggregation of particles and rotating excitation field moulding increase grain diameter and change its form, to improve the sensitivity of detection;By changing
Enter the uniformity along its axis direction of the magnetic induction in solenoid coil structural adjustment solenoid, to reduce detection error;
Construct zero magnetic field, the outside field coil differential concatenation (double excitation solenoid) that two are driven by high-frequency ac power, the magnetic of generation
Field direction is contrary, can make to be placed exactly in magnetic field at central sensory coil at tube interior and cancel out each other, be zero magnetic field, it is ensured that magnetic
The biggest variation rate of magnetic flux can be obtained when variations of flux is less, to improve detection sensitivity, reduce follow-up signal and process electricity
Road requirement.
[accompanying drawing explanation]
Fig. 1 is the overall structure of the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering of the present invention
Schematic diagram.
Fig. 2 is the structural representation of the wave filter in Fig. 1.
Fig. 3 is plug-in type H mode filter schematic diagram.
Fig. 4 is the H mode filter frequency characteristic constitutional diagram of single H mode filter and series connection.Wherein, solid line is single
H mode filter frequency characteristic.
Fig. 5 is the structural representation of K-type wave filter.
Fig. 6 is the cross sectional representation of elastic thin-wall.
Fig. 7 is the Longitudinal cross section schematic of colloid damping layer.
Fig. 8 is the connection diagram separating adsorption module in Fig. 1.
Fig. 9-1 is the horizontal schematic diagram of the mechanical centrifugal module in Fig. 8.
Fig. 9-2 is the radial direction schematic diagram of the mechanical centrifugal module in Fig. 8.
Figure 10 is the structural representation of the magnetized module in Fig. 8.
Figure 11-1 be the magnetic suck module in Fig. 8 be the structural representation of homopolarity adjacent type absorbing ring.
Figure 11-2 is the structural representation of the adjacent type absorbing ring of the homopolarity that magnetic suck module is charged hammer in Fig. 8.
Figure 12 is the structural representation of the electrification module in Fig. 8.
Figure 13 is the structural representation of the electric adsorption module in Fig. 8.
Figure 14 is the structural representation rotating moulding module in Fig. 1.
Figure 15-1 is the structural representation of the winding of the detection coil in Fig. 1.
Figure 15-2 is the circuit diagram of the exciting current output module in Figure 15-1.
Figure 16 is the annexation figure of the ECU module in Fig. 1.
[detailed description of the invention]
Referring to shown in Figure of description 1 to accompanying drawing 16, the present invention is a kind of double excitation helical using full frequency band to filter
Tubular type microgranule sensitivity detection equipment, it is arranged on fluid pressure line 7, its by wave filter 8, separate adsorption module 2, rotate moulding mould
Several parts compositions such as block 3, excitation coil I4, induction coil 5, excitation coil II6 and ECU1.
Wherein, described wave filter 8, separate adsorption module 2, rotate moulding module 3, excitation coil I4, induction coil 5, swash
Encourage coil II6 to be successively set on fluid pressure line 7.Described ECU1 is electrically connected with and controls wave filter 8, separates adsorption module
2, moulding module 3, excitation coil I4, excitation coil II5 and induction coil 5 are rotated.
Owing to the flow velocity of fluid is very big on detection characteristic impact, along with the increase of oil flow, the sensitivity of detection and
Output voltage all will occur significant change;Meanwhile, the flow of fluid also has large effect to detection output, when flow increases
Time, output voltage is as well as change, and this is very big, to this end, the present invention is in inspection to concordance and the availability influence of testing result
Wave filter 8 stable hydraulic system pressure and flow is added before survey.
Described wave filter 8 is hindered by input pipe 81, shell 89, outlet tube 811, corrugated tube 83, elastic thin-wall 87 and colloid
Several parts compositions such as Buddhist nun's layer 88.
Wherein, described input pipe 81 is connected to one end of shell 89, is used for inputting fluid;Described outlet tube 811 is connected to
The other end of shell 89, itself and separation adsorption module 2 dock.Described elastic thin-wall 87 is installed on shell 89 along the radial direction of shell
In.The axis of described input pipe 81 and outlet tube 811 the most on the same axis, so can improve the filtering effect of more than 10%
Really.
Described input pipe 81, outlet tube 811 and elastic thin-wall 87 are collectively forming a K-type wave filter, thus hydraulic pressure system of decaying
System high frequency pressure pulsations.The filter transmission coefficient obtained after processing by lumped-parameter method is:
Velocity of sound ρ fluid density d in a medium2Plug-in type outlet tube diameter Z characteristic impedance.
From above formula, K-type wave filter is similar with the electric capacity effect in circuit.The pressure pulse wave of different frequency is by being somebody's turn to do
During wave filter, transmission coefficient is different with frequency.Frequency is the highest, then transmission coefficient is the least, and this shows the pressure pulse wave of high frequency
Decay the most severe when device after filtering, thus serve the effect eliminating high frequency pressure pulsations.
The design principle of described K-type wave filter is as follows: when in pipeline, the fluctuating frequency of pressure is higher, pressure oscillation acts on stream
On body, convection cell produces pinch effect.When the flow of change enters K-type wave filter cavity volume by input pipe, liquid stream exceedes averagely
Flow, the cavity volume of expansion can absorb unnecessary liquid stream, and releases liquid stream when less than average discharge, thus absorption pressure pulsating energy
Amount.
Described elastic thin-wall 87 weakens hydraulic system medium-high frequency pressure fluctuation by being forced to mechanical vibration.By lumped parameter
The elastic thin-wall natural frequency that method obtains after processing is:
K elastic thin-walled structures coefficient h elastic thin-wall thickness R elastic thin-wall radius
The mass density of the Young's modulus ρ elastic thin-wall of E elastic thin-wall
The Poisson's ratio of the current-carrying factor mu elastic thin-wall of η elastic thin-wall.
Substitute into actual parameter, above formula is carried out simulation analysis it is found that the natural frequency generally ratio H type of elastic thin-wall 87
The natural frequency of wave filter is high, and its attenuation band is also wide than H mode filter.In relatively wide frequency band range, elastic
Thin-walled has good attenuating to pressure fluctuation.Meanwhile, the elastic thin-wall radius in the filter construction of the present invention is bigger
And relatively thin, its natural frequency, closer to Mid Frequency, can realize the effective attenuation to the medium-high frequency pressure fluctuation in hydraulic system.
The design principle of described elastic thin-wall 87 is as follows: when producing intermediate frequency pressure fluctuation in pipeline, Double-pipe plug-in type cavity volume
Wave filter is more weak to the damping capacity of pressure oscillation, flows into the periodically pulsing pressure continuous action of Double-pipe plug-in type cavity volume at bullet
Property thin-walled inside and outside wall on, owing to having between inside and outside wall, pillar is fixing to be connected, and inside and outside elastic thin-wall is simultaneously by the frequency of fluctuation pressure
Rate does periodic vibration, and this forced vibration consumes the pressure fluctuation energy of fluid, thus realizes the filtering of Mid Frequency pressure.By void
Merit principle understands, and the ability that elastic thin-wall consumes fluid pulsation pressure energy is straight with potential energy during its forced vibration and kinetic energy sum
Connecing relevant, in order to improve Mid Frequency filtering performance, the radial design of elastic thin-wall is much larger than pipe radius, and the thickness of thin-walled
Less, representative value is less than 0.1mm.
Further, the resonance cavity volume 85 of cylinder is formed between described elastic thin-wall 87 and shell 89.Described Thin Elastic
Some conical damping holes 86 are uniformly had, to ensure all can realize plug-in type in the range of whole wave filter in the axial direction of wall 87
Connection in series-parallel filters.Conical damping hole 86 connection resonance cavity volume 85.The described wider place of conical damping hole opening is positioned at resonance cavity volume,
Its taper angle is 10 °, for broadening frequency filtering scope, the wave filter natural angular frequency obtained after processing by lumped-parameter method
For:
Velocity of sound L damping hole long S damping hole cross-sectional area V parallel resonance cavity volume volume in a medium.
Described corrugated tube 83 is wound on outside resonance cavity volume 85 in the shape of a spiral, and resonance cavity volume 85 inserts pipe 82 by multiple tapers
Connection.Described taper insert the wider place of pipe 82 opening be positioned at corrugated tube 83, its taper angle be 10 ° for broadening frequency filtering model
Enclose.Described taper is inserted the position of pipe 82 and conical damping hole 86 and is mutually staggered.Described corrugated tube 83 passes through some between respectively enclosing
Arm 810 connects, and arm 810 is provided with switch 84.Described corrugated tube 83 and resonance cavity volume 85 form plug-in type spiral isomery string
Connection H mode filter.
As shown in Figure 4, cascaded H mode filter has 2 natural angular frequencies, and at crest, filter effect is preferable, and at trough
Place does not has filter effect the most substantially;The corrugated tube 83 that have employed spiral isomery in plug-in type spiral isomery cascaded H mode filter is tied
Structure, corrugated tube itself has elasticity, when flow and the pressure fluctuation of hydraulic system cause liquid through corrugated tube, fluid media (medium)
Pressure-spring system vibrates, and offsets Wave energy, thus plays filter action;Meanwhile, the some arms between each circle corrugated tube 83
The connection of 810 or disconnection, cause interference and the superposition of ripple, thus change the frequency characteristic of cascaded H mode filter;Reasonable arrangement is filtered
Ripple device parameter and the connection quantity of arm and position, can make the trough of the frequency characteristic of cascaded H mode filter raise, make filtering
Device has good filtering performance at whole medium and low frequency Duan Jun, it is achieved the entire spectrum filtering of medium and low frequency section.
The inner side of described elastic thin-wall 87 is provided with colloid damping layer 88.Internal layer and the outer layer of described colloid damping layer 88 divide
Not Wei outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82, if by the Heavenly Stems and Earthly Branches between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82
Post 814 is fixing to be connected.It is filled with in interlayer between outer layer elastic thin-wall 81 and internal layer elastic thin-wall 82 and adds the pure of antifreezing agent
Water 816, is suspended with Bio-sil 815 in pure water 816.Described colloid damping layer 88 is near one end of outlet tube 811 and shell
89 are connected;Described colloid damping layer 88 is additionally provided with a piston 817 near one end of outlet tube 811.
Due to outer layer elastic thin-wall 81 with internal layer elastic thin-wall 82 spacing is the least and is connected, at pressure by pillar 814 is fixing
When pulsation acts perpendicularly to thin-walled, inside and outside wall produces and is close to consistent deformation, and colloid damping layer thickness is kept approximately constant, to pressure
Power pulsation does not has damping action;The flow pulsation in 817 sensation level directions of piston of colloid damping layer 88, flow pulsation strengthens
Time, piston 817 pressurized makes colloid damping layer shrink, and squeezing action makes the water in colloid damping layer 88 by nanoscale transfer passage
Enter micron order central void;When flow pulsation weakens, piston 817 is by back-pressure, and now colloid damping layer expands, colloid damping layer
In water from central void through passage discharge.In the process, due to mechanics effect, the channel table of silica gel 815 microchannel sorption
The roughness effect of face molecular scale and chemistry heterogeneous body effect, piston follow colloid damping layer shrink and expansion process is done " gas-
Liquid-solid " interfactial work on border, thus flow systolic implementation is decayed, its substantially parallel R mode filter.This filtering
Device is relative to the advantage of general liquid condenser: it is decayed flow by the way of the interfactial work on " gas-liquid-solid " border
Pulsation, can absorb a large amount of mechanical energy in the case of not producing heat, and energy expenditure does not relies on piston speed, decay effect
Rate is obviously improved.
The present invention can also the pulsation decay of solid line operating mode self-adaptive pressure.When hydraulic system working conditions change, both executive components
Suddenly stop or running, and when the opening of valve changes, the characteristic impedance of pipe-line system can be caused to undergo mutation, so that former pipe
Pressure curve with change in location in time in road changes the most therewith, then the position of pressure peak also changes.Due to the present invention
The axial length of wave filter be designed as pulsing wavelength, and the plug-in type spiral isomery series connection of wave filter more than system main pressure
The cavity volume length of H mode filter, the length of K-type wave filter and the length of elastic thin-wall and wave filter axial length are equal, it is ensured that
Pressure peak position is constantly in the effective range of wave filter;And plug-in type spiral isomery cascaded H mode filter
Conical damping hole 86 is opened on elastic thin-wall 87, is uniformly distributed in the axial direction, the corrugated tube 83 of spiral isomery winding and resonance
Taper between cavity volume 85 is inserted pipe and is axially being uniformly distributed so that pressure peak change in location to the performance of wave filter almost without
Impact, it is achieved thereby that operating mode adaptive-filtering function.Suitable in view of three kinds of filter structure axial dimensions and wave filter, this
Bigger size also ensure that hydraulic filter possesses stronger pressure fluctuation damping capacity.
The method that the pressure fluctuation restraining device using the present invention carries out hydraulic pulsation filtering is as follows:
1), hydraulic fluid enters K-type wave filter by input pipe, and the cavity volume of expansion absorbs unnecessary liquid stream, completes high frequency pressure
The filtering of power pulsation;
2), by elastic thin-wall 87 forced vibration, consume the pressure fluctuation energy of fluid, complete the filter of intermediate frequency pressure fluctuation
Ripple;
3), by plug-in type spiral isomery cascaded H mode filter, insert pipe by conical damping hole, taper and fluid produces
Raw resonance, consumes pulsation energy, completes the filtering of low frequency pulsation;
4), the axial length of wave filter is designed as more than hydraulic system main pressure pulsation wavelength, and plug-in type string is also
Connection H mode filter length, filter length and elastic thin-wall 87 length are equal with filter length, make pressure peak position always
It is in the effective range of wave filter, it is achieved the filtering of pressure fluctuation when system condition changes.
Galling abrasive particle in machine oil can be divided into ferromagnetics microgranule (such as ferrum) and non-ferric according to its electromagnetic property
Magnetic substance microgranule (such as copper, aluminum).Ferromagnetics microgranule strengthens the equivalent inductance of cell winding, and non-ferromagnetic material microgranule then weakens sensing
The equivalent inductance of device coil.When two kinds of microgranules are simultaneously by detection coil, this monitoring device will lose efficacy.To this end, the present invention uses
Separate adsorption module 2 and separate both microgranules.Described separation adsorption module 2 is by the mechanical centrifugal module 21 being sequentially connected with, magnetic
Change module 22, magnetic suck module 23, electrification module 24 and electric adsorption module 25 to form.
Wherein, described mechanical centrifugal module 21 makes fluid under the action of the centrifugal, and the solid particle that quality is bigger is thrown toward chamber
Wall, it uses the mode of energy loss, and its design principle is as follows: arrange the water conservancy diversion of the distortion of certain altitude and length in the duct
Sheet, and make blade face tangent line angled with axis, fluid can be made to produce spiral flow in pipes, this spiral shell because pipe flow border changes
Eddy flow can be analyzed to the circumferential flow around pipe axle and axial straight flowing, and the particulate matter carried in fluid produces off-axis alignment heart spiral shell
Rotation motion.This eddy flow centrifugal device 21 is by eddy flow tube wall the 211, first flow deflector the 212, second flow deflector 213, motor 214
And several parts such as flow transducer 215 composition, described motor 214 and flow transducer 215 are electrically connected to ECU1.
Wherein, described first flow deflector 212 is provided with 3, these 3 first flow deflectors 212 along tube wall 211 inner periphery every 120 °
Being uniformly distributed, its laying angle (angle between the first flow deflector 212 and eddy flow tube wall 211) is set to 18 °, optimal tangential to ensure
Flowing.Described second flow deflector 213 is identical with the first flow deflector 212 structure, after it is arranged on the first flow deflector 212, and and the
One flow deflector 212 staggers 60 ° and is connected in tube wall 211, and its laying angle is set to 36 DEG C, is used for reducing resistance and strengthening circumferential flow
Intensity.It addition, the 3rd or more flow deflector can be arranged the most again according to actual separation effect, laying angle gradually increases.Institute
State motor 214 connect and drive the first flow deflector 212 and the second flow deflector 213, to regulate laying angle, thus can obtain more
Good centrifugal effect, knows and makes flow deflector 212,213 adapt to different operating modes.Described flow transducer 215 is arranged on tube wall 211
Interior central authorities, the ECU1 numerical analysis cyclonic separation effect by reading flow quantity sensor 215, and control motor accordingly
214, motor 214 regulates the laying angle of each flow deflector 212,213, to obtain more separating effect.
Further, the long limit of described first flow deflector 212 is connected with tube wall 211, and minor face 213 is along the axis of tube wall 211
Extend;For reducing resistance, its leading edge frustrates into obtuse;For avoiding streaming, trailing edge is processed into wing;Its height is tube wall 211 diameter
0.4 times, make the spiral flow of formation have bigger intensity;1.8 times of a length of tube wall 211 diameter, bigger right to ensure
The sphere of action of fluid.
Described magnetized module 22 is force-magnetized by the ferromagnetic metal wear particle that carries in fluid, and makes micron-sized
Wear particle aggregates into bulky grain, can improve the output signal strength of sensor.Described magnetizing assembly 22 is by aluminum matter pipeline
221, some windings 222, iron shell 223 and flange 224 form.Wherein, described aluminum matter pipeline 221 makes fluid flow from which
Cross and by magnetization treatment, and the pcrmeability of aluminum is the lowest, can make to obtain in pipeline 221 higher magnetic field intensity.
Described some windings 222, rotating around outside aluminum matter pipeline 221, are coated insulation by the copper wire of a diameter of about 1.0mm
Paint is made.Described iron shell 223 is coated on aluminum matter pipeline 221, and the material of irony can mask most magnetic flux.Described
Flange 224 is welded on the two ends of aluminum matter pipeline 221.
Described magnetic suck module 23 is polymerized big microgranule for adsorpting aggregation in the magnetization of near-wall, and it can use homopolarity phase
Adjacent type absorbing ring.This homopolarity adjacent type absorbing ring by aluminium ring shape pipeline 231, forward solenoid 232, reverse solenoid 233 with
And the parts such as irony magnetic conduction cap 234 composition.Wherein, described forward solenoid 232 and reverse solenoid 233 are respectively arranged in aluminum matter
In circulating line 231 and by ECU1 control, both are connected with electric current in opposite direction so that forward solenoid 232 and reverse helical
Pipe 233 adjacent produces like pole.Described irony magnetic conduction cap 234 is arranged on the inwall of aluminium ring shape pipeline 231, and it is positioned at
Forward solenoid 232 and reverse solenoid 233 adjacent and forward solenoid 232 and the centre of reverse solenoid 233 axis
Point.
The design principle of described homopolarity adjacent type absorbing ring is as follows: energising forward solenoid 232, reverse solenoid 233, phase
Adjacent forward solenoid 232, reverse solenoid 233 are connected with electric current in opposite direction so that forward solenoid 232, reverse helical
Pipe 233 adjacent produces like pole;Meanwhile, aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens the magnetic field at inner-walls of duct
Intensity, strengthens the irony magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse solenoid 233 electric current
Directly controlled by ECU1, can be different with concentration and change, to obtain optimal adsorption performance according to the size of granule.
Further, the homopolarity adjacent type absorbing ring that described magnetic suck module 23 may be used without charged hammer, this band shocks by electricity
The homopolarity adjacent type absorbing ring of hammer is by aluminium ring shape pipeline 231, forward solenoid 232, reverse solenoid 233, irony magnetic conduction cap
234, dividing plate 235, the parts such as hammer 236 and electric magnet 237 that shock by electricity form.Wherein, described forward solenoid 232 and reverse helical
Pipe 233 is respectively arranged in aluminium ring shape pipeline 231 and by ECU1 control, and both are connected with electric current in opposite direction so that forward
Solenoid 232 and reverse solenoid 233 adjacent produce like pole.Described irony magnetic conduction cap 234 is arranged in aluminium ring shape pipe
On the inwall in road 231, it is positioned at forward solenoid 232 and reverse solenoid 233 adjacent and forward solenoid 232 and anti-
Intermediate point to solenoid 233 axis.Described electric shock hammer 236 and electric magnet 237 are between dividing plate 235.Described electric magnet 237
Connect and electric shock hammer 236 can be promoted, making electric shock hammer 236 percussion aluminium ring shape pipeline 232 inwall.Described ECU1 is electrically connected with and controls
Forward solenoid 232 processed, reverse solenoid 233 and electric magnet 237.
The design principle of the homopolarity adjacent type absorbing ring of described charged hammer is as follows: energising forward solenoid 232, reverse spiral shell
Spool 233, adjacent forward solenoid 232, reverse solenoid 233 are connected with electric current in opposite direction so that forward solenoid
232, reverse solenoid 233 adjacent produces like pole;Meanwhile, aluminium ring shape pipeline 231 can improve magnetic circuit, strengthens pipeline
Magnetic field intensity at inwall, strengthens the irony magnetic conduction cap 234 capture absorbability to granule.Each forward solenoid 232, reverse spiral shell
Spool 233 electric current is directly controlled by ECU1, can be different with concentration and change, to obtain optimal adsorption according to the size of granule
Performance.And by the setting of electric shock hammer 236, prevent granule bulk deposition at irony magnetic conduction cap 234, affect adsorption effect.This
Time, controlled the inwall of electric shock hammer 236 percussion pipeline 231 by electric magnet 237 so that adsorbed granule scatter to both sides.
Meanwhile, when cleaning pipeline 231, the percussion of electric shock hammer 236 can also improve cleaning performance.
After described magnetic suck module 23 has been adsorbed, ECU1 controls electric magnet power-off, and paramagnetism aluminum matter pipeline loses magnetism,
It is attached to magnetic polymeric bulky grain on inner-walls of duct will be disengaged from tube wall and enter electrification module 24 with fluid along tube wall with low speed.
Described electrification module 24 makes the non-ferromagnetic metal wear particle in hydraulic oil charged, its by some electrodes 241 with
And one electrode controller 242 form.Described some electrodes 241 are installed on fluid pressure line 7, and it is respectively connecting to electrode controller
242.Described electrode controller 242 is electrically connected with and applies voltage to electrode 241, makes the particulate matter in fluid charged.
Non-ferromagnetic metal wear particle in fluid is adsorbed on tube wall by described electric adsorption module 25, and it is by aluminum matter pipe
Road 251, positive plate 252, minus plate 253 and pole plate controller 254 form.Wherein, described positive plate 252, minus plate 253 points
It is not arranged on aluminum matter pipeline 251, and in being oppositely arranged;Described positive plate 252, minus plate 253 are respectively and electrically connected to pole plate
On controller 254;Described pole plate controller 254 is electrically connected to ECU1, and by ECU1 control.
The operation principle of described electric adsorption module 25 is as follows: charged non-ferromagnetic material metallic wear particles with fluid with speed
V flows into electric adsorption module 25 along tube wall, and two electrodes of the negative and positive of electric adsorption module 25 525,253 are controlled by pole plate controller 254
Produce the uniform electric field vertical with speed V direction, then charged corpuscle is subject to be perpendicular to velocity attitude in electric field is centrifuged module
The effect of electric field force, makes charged particle do parabolic motion to pole plate under this force, and charged corpuscle is inhaled along the direction of motion
Other microgranule attached forms polymeric macroparticle.This parabolic motion specifically refer to charged corpuscle axially follow fluid do straight line fortune
Dynamic, radially then do at the uniform velocity or variable motion under electric field force effect, changing electric field intensity by pole plate controller 254 can change
Movement velocity, makes charged polymeric bulky grain be adsorbed onto on tube wall.After having adsorbed, when ECU1 controlling plate controller 254 power-off
Time, it is attached to magnetic polymeric bulky grain on inner-walls of duct and will be disengaged from tube wall and enter rotation moulding mould with fluid along tube wall with low speed
Block 3.
The moulding module of described rotation 3 is for improving the sensitivity of detection.Research shows: the inductance rate of change of cell winding
It is directly proportional to the cube of abrasive particle radius.Meanwhile, the form of magnetizing mediums more trends towards elongate, and its demagnetizing factor is the least, magnetization
Intensity is the biggest, and magnetizing field field intensity is the biggest.Change on sensor equivalent inductance affects the biggest.The moulding module of this rotation 3 is by aluminum matter
A few part groups such as pipeline 31, some windings 32, iron shell 33, flange 34 and the moulding current output module of some rotations 35
Become.Wherein, described some windings 32 are rotating around outside aluminum matter pipeline 31;Described iron shell 33 is coated on aluminum matter pipeline 31;
Described flange 34 is welded on the two ends of aluminum matter pipeline 31;The moulding current output module of each rotation 35 is connected to a winding 32.
The design principle of the moulding module of described rotation 3 is as follows: polymeric macroparticle enters with fluid after rotating moulding module 3,
ECU1 controls to rotate moulding current output module 35, makes to flow through three-phase symmetrical electric current in the moulding current output module of rotation 35, should
Electric current produces rotating excitation field in aluminum matter pipeline 31.Magnetized particles is acted on by magnetic field force under rotating excitation field effect, and
Spirally advancing under the effect of this power, magnetic microparticles defines a lot of acicular texture along magnetic line of force direction, these acicular textures
Magnetic field will be followed spin motion when magnetic field rotating, and specifically move along a straight line axially following fluid, radially then follow rotation
Turn magnetic field to spin motion.Adjust three-phase symmetrical electric current and can change speed and the track of screw.Needle-like knot when motion
When metal particle on structure and movement locus meets with, it is combined with one another to bulky grain polymer.By rotating moulding module 3, make oil
The particle diameter of the metal particle in liquid increases form simultaneously and becomes elongated acicular texture so that the fiber number of metal particle increases the most greatly
Add, further enhancing the sensitivity of Double-coil type detection.
Metallic wear particles is non-uniform Distribution in oil circuit, and variations in flow patterns is sufficiently complex, when particle size and material become
During change, its changes of magnetic field caused is the faintest, if detection Magnetic field inhomogeneity will cause serious measurement error, makes detection spirit
Sensitivity reduces;Requiring that the characteristic of excitation coil I and excitation coil II is completely the same, this is usually extremely difficult to simultaneously, for this
The excitation coil I and excitation coil II needing design has the function of on-line automatic regulation.Specifically, described excitation coil I4
All comprising some windings with excitation coil II6, each winding is made up of positive winding 41 and inverse winding 42, and each winding is respectively connecting to one
Exciting current output module 43.This exciting current output module 43 is by ECU1 control, and its digital potentiometer used is AD5206,
There is the output of 6 passages, can and ECU1 between realize single bus data transmission.ECU1 is realized magnetization winding by monobus
The current settings of polylith exciting current output module 73 and output.Amplifier AD8601 and metal-oxide-semiconductor 2N7002 are real by negative feedback
Show the output of high-precision voltage follow.Constant High-current output have employed the high voltage of Texas Instrument (TI), the fortune of big electric current
Put OPA 549.
The operation principle of described detection coil 7 is as follows: in order to produce the magnetic field in same polarity direction and make up breach and make simultaneously
The magnetic field become is unbalanced, and positive winding 41 is identical with the current characteristics in inverse winding 42, arranges on the axis direction of conduit under fluid pressure 7
There is multipair forward and reverse winding, control electric current by different exciting current output modules 43, it is possible to form the uniform magnetic of system requirements
?.
Because the abrasive particle in liquid is the least, the impact on former magnetic field is the least, and the flux change amount i.e. produced is the least,
The sensitivity high in order to ensure sensor, needs to obtain big induction electromotive force in induction coil.According to Faradic electricity magnetic strength
Answering law, the size of induced electromotive force and being directly proportional by the rate of change of the magnetic flux of conductor circuit, its direction depends on magnetic field
Direction and situation of change.When magnetic flux change is less, big to make its rate of change, its approach has two kinds: one to be to increase former line
The number of turn of circle, but sensor bulk so can be caused excessive, inadvisable;One be former magnetic field magnetic flux be zero, be i.e. in zero magnetic field
In.Based on this, three groups of coils of the employing of the sensor of this design.Excitation coil I4 and excitation coil II6 is handed over by high frequency
Stream power drives, two coil differential concatenations, the magnetic direction of generation is contrary, and described induction coil 5 be positioned at excitation coil I4 and
Central authorities between excitation coil II6, can make magnetic field at induction coil 5 cancel out each other, be zero magnetic field.Induction coil 5 and ECU
Connect.When in fluid by there being metal bulky grain, cause disturbance of magnetic field, cause induction coil 5 to produce induction electromotive force, utilize
Ferromagnetics and the non-ferromagnetic material metal particle otherwise impact to former magnetic field, cause phase of output signal contrary, can distinguish in fluid
Wear particle type;Magnetic media grain is the biggest, and fiber number is the biggest, and the biggest on magnetic field impact, the amplitude of output signal is the biggest, detection
Sensitivity is the highest.
The concrete grammar using above-mentioned supervising device to be monitored hydraulic oil is as follows:
1), the fluid in fluid pressure line 7 passes through wave filter 8, the high, medium and low frequency range that wave filter 8 is decayed in hydraulic system
Fluctuation pressure, and suppression flowed fluctuation;
2), fluid enters the mechanical centrifugal module 21 separating adsorption module 2 afterwards, makes the wear particle in fluid be polymerized also
Realizing initial centrifugation, the polymeric macroparticle making quality bigger gets rid of to near-wall;
3), make ferromagnetic metal polymeric macroparticle force-magnetized by magnetized module 22;
4), magnetic suck module 23 adsorbs the big microgranule of magnetized metal polymerization;
5), by electrification module 24, the non-ferromagnetic metal wear particle charged polymeric in fluid is made;
6), charged particle flows into electric adsorption module 25 with speed v subsequently, and electric adsorption module 25 is controlled to produce and speed by ECU1
The uniform magnetic field that degree v direction is vertical, charged particle is subject to be perpendicular to the Lip river logical sequence of velocity attitude and magnetic direction in segregation apparatus
The effect of magnetic force, makes charged particle under this force to aluminum matter vessel wall motion, so that the non-ferromagnetic metal in fluid
Wear particle " separates " out from fluid, and absorption is on tube wall.
7), after magnetic suck and electro-adsorption to enough particle concentrations, ECU1 first controls electric adsorption module 25 by electric field side
To first reversely, then cancel electric field, then adsorb non-ferromagnetic metal wear particle on tube wall and start to depart from tube wall delay from static
Slow-motion enters to rotate moulding module 3, and electric adsorption module 25 the most then recovers original electric field.Meanwhile, ECU1 controls magnetic suck mould
Block 23 power-off, paramagnetism aluminum matter pipeline loses magnetism, and is attached to magnetic polymeric bulky grain on inner-walls of duct and will be disengaged from tube wall, electrification
The power-off of module 24, ferromagnetic particle flows through electrification module 24 and electric adsorption module 25 with low speed with fluid, enters rotation moulding
Module 3.Subsequently, magnetic suck module and the electrification original duty of module recovery.
8), charged nonferromagnetic microgranule and magnetized ferromagnetic particle successively enter and rotate moulding module 3, now ECU1
Controlling to flow through three-phase symmetrical electric current in three-phase symmetric winding, this electric current produces rotating excitation field in aluminum matter pipeline.Magnetized particles exists
Being acted on by magnetic field force under rotating excitation field effect, and the most spirally advance, magnetic microparticles is along the magnetic line of force
Direction defines a lot of acicular texture, and these acicular textures will be followed magnetic field and be spinned motion when magnetic field rotating, when motion
When metal particle in acicular texture and movement locus meets with, it is combined with one another to bulky grain polymer.
9), by rotating moulding module 3, make the particle diameter of the metal particle in fluid increase form simultaneously and become elongated needle-like
Structure so that the fiber number of metal particle is also greatly increased, further enhancing the sensitivity of Double-coil type detection.This two class subsequently
Microgranule enters excitation coil I4, ECU1 with the state of low speed, high concentration, bulky grain and big fiber number in batches and controls exciting current holding
The magnetic field homogeneity of excitation coil I4, simultaneously because the power of test of Ferrous particles is greater than copper by the inductance of same model
The power of test of granule, need ECU1 regulation exciting current to compensate this difference, with keep output concordance.
10), excitation coil I4 and excitation coil II6 is driven by high-frequency ac power, two coil differential concatenations, the magnetic of generation
Field direction is contrary, is positioned at magnetic field at the induction coil 5 of both central authorities and cancels out each other, when in fluid by there being metal bulky grain,
Cause disturbance of magnetic field, cause induction coil 5 to produce significant induction electromotive force.Utilize ferromagnetics and non-ferromagnetic material metal particle pair
The otherwise impact in former magnetic field, causes phase of output signal contrary, can distinguish wear particle type in fluid, and induction electromotive force
Power may determine that the quantity of abraded metal particle, thus realizes that signal conformance is good, reliability is high, detection signal is strong and error
Little contactless detection of particulates.
Above detailed description of the invention is only the preferred embodiment of this creation, not in order to limit this creation, all in this wound
Any modification, equivalent substitution and improvement etc. done within the spirit made and principle, should be included in this creation protection domain it
In.
Claims (10)
1. using the double excitation solenoid type microgranule sensitivity detection equipment that full frequency band filters, it is arranged on fluid pressure line,
It is characterized in that: include wave filter, separate adsorption module, rotate moulding module, excitation coil I, excitation coil II, induction coil
And ECU;Wherein, described wave filter, separate adsorption module, rotate moulding module, excitation coil I, induction coil, excitation coil
II is successively set on fluid pressure line;Described excitation coil I and excitation coil II differential concatenation;Described induction coil is positioned at excitation
Central authorities between coil I and excitation coil II;Described ECU is electrically connected with and controls wave filter, separates adsorption module, rotation
Moulding module, excitation coil I, excitation coil II and induction coil;Described wave filter includes input pipe, shell, outlet tube, ripple
Pipe, elastic thin-wall and colloid damping layer;Described input pipe is connected to one end of shell;Described outlet tube is connected to the another of shell
One end, it extends in shell;Described elastic thin-wall is installed in shell along the radial direction of shell;Described input pipe, outlet tube and
Elastic thin-wall is collectively forming a K-type wave filter;The resonance cavity volume of cylinder is formed between described elastic thin-wall and shell;Described bullet
Property thin-walled axial direction on uniformly have some conical damping holes, conical damping hole connection resonance cavity volume;Described corrugated tube is helically
Shape is wound on outside resonance cavity volume, inserts pipe with resonance cavity volume by multiple tapers and connects;Described corrugated tube passes through some between respectively enclosing
Arm connects, and arm is provided with switch;Described corrugated tube and resonance cavity volume composition plug-in type spiral isomery cascaded H mode filter;
Described separation adsorption module is inhaled by the mechanical centrifugal module being sequentially connected with, magnetized module, magnetic suck module, electrification module and electricity
Attached module forms.
2. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: the axis of described input pipe and outlet tube is the most on the same axis;The described wider place of conical damping hole opening is positioned at resonance
In cavity volume, its taper angle is 10 °;Described taper is inserted the wider place of tube opening and is positioned at corrugated tube, and its taper angle is 10 °;Described
Taper is inserted the position of pipe and conical damping hole and is mutually staggered;It is elastic that the internal layer of described colloid damping layer and outer layer are respectively outer layer
Thin-walled and internal layer elastic thin-wall, connected by some pillars are fixing between outer layer elastic thin-wall and internal layer elastic thin-wall;Described outer layer
It is filled with the pure water adding antifreezing agent in interlayer between elastic thin-wall and internal layer elastic thin-wall, in pure water, is suspended with porous silicon
Glue;Described colloid damping layer is connected with shell near one end of outlet tube;Described colloid damping layer sets near one end of outlet tube
There is a piston.
3. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: described mechanical centrifugal module uses eddy flow to be centrifuged module;Described eddy flow is centrifuged module and includes eddy flow tube wall, the first water conservancy diversion
Sheet, the second flow deflector, motor and flow transducer;Wherein, described first flow deflector is provided with 3, these 3 first water conservancy diversion
Sheet is uniformly distributed along tube wall inner periphery every 120 °, and its laying angle is set to 18 °;Described second flow deflector and the first flow deflector structure phase
With, after it is arranged on the first flow deflector, and and the first flow deflector stagger 60 ° and be connected in tube wall, its laying angle is set to 36 DEG C;Institute
The long limit stating the first flow deflector is connected with tube wall, and minor face extends along the axis of tube wall;Its leading edge frustrates into obtuse, and trailing edge is processed into the wing
Shape, its height is 0.4 times of tube wall diameter, 1.8 times of a length of tube wall diameter;Described motor connects and drives first to lead
Flow and the second flow deflector, to regulate laying angle;Described flow transducer is arranged on the central authorities in tube wall.
4. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: described magnetized module includes aluminum matter pipeline, some windings, iron shell and flange;Wherein, described some windings are respectively
It is wound on outside aluminum matter pipeline;Described iron shell is coated on aluminum matter pipeline;Described flange welding is at the two ends of aluminum matter pipeline.
5. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
Being: described magnetic suck module uses homopolarity adjacent type absorbing ring, this homopolarity adjacent type absorbing ring includes aluminium ring shape pipeline, just
To solenoid, reverse solenoid and irony magnetic conduction cap;Described forward solenoid and reverse solenoid are respectively arranged in aluminium ring
In shape pipeline, both are connected with electric current in opposite direction so that forward solenoid and reverse solenoid adjacent produce like pole;
Described irony magnetic conduction cap is arranged on the inwall of aluminium ring shape pipeline, its be positioned at forward solenoid and reverse solenoid adjacent,
And forward solenoid and the intermediate point of reverse solenoid axis.
6. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: described magnetic suck module uses the homopolarity adjacent type absorbing ring of charged hammer, the homopolarity adjacent type absorption of this charged hammer
Ring includes aluminium ring shape pipeline, forward solenoid, reverse solenoid, irony magnetic conduction cap, dividing plate, electric shock hammer and electric magnet;Institute
Stating forward solenoid and reverse solenoid is respectively arranged in aluminium ring shape pipeline, both are connected with electric current in opposite direction so that
Forward solenoid and reverse solenoid adjacent produce like pole;Described irony magnetic conduction cap is arranged in the interior of aluminium ring shape pipeline
On wall, it is positioned at forward solenoid and reverse solenoid adjacent and forward solenoid and the centre of reverse solenoid axis
Point;Described dividing plate is between forward solenoid and reverse solenoid;Described electric shock hammer and electric magnet are between dividing plate;Described
Electric magnet connects and can promote electric shock hammer, makes electric shock hammer tap aluminium ring shape inner-walls of duct.
7. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: described electrification module includes some electrodes and an electrode controller;Described some electrodes are installed on fluid pressure line, its
It is respectively connecting to electrode controller.
8. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: described electric adsorption module includes aluminum matter pipeline, positive plate, minus plate and pole plate controller;Wherein, described positive plate,
Minus plate is separately positioned on aluminum matter pipeline, and in being oppositely arranged;Described positive plate, minus plate are respectively and electrically connected to pole plate control
On device processed;Described pole plate controller is electrically connected to ECU, and by ECU control.
9. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
It is: the moulding module of described rotation includes aluminum matter pipeline, some windings, iron shell, flange and the moulding electric current of some rotations
Output module;Wherein, described some windings are rotating around outside aluminum matter pipeline;Described iron shell is coated on aluminum matter pipeline;Institute
State the flange welding two ends at aluminum matter pipeline;The moulding current output module of each rotation is connected to a winding.
10. the double excitation solenoid type microgranule sensitivity detection equipment using full frequency band filtering as claimed in claim 1, its feature
Being: described excitation coil I and excitation coil II all comprises some windings, each winding is made up of positive winding and inverse winding, respectively around
Group is respectively connecting to an exciting current output module, and this exciting current output module is controlled by ECU module.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610311409.4A CN105891057A (en) | 2016-05-12 | 2016-05-12 | Double-excitation solenoid type particle sensitive detection device adopting full-band filtering |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610311409.4A CN105891057A (en) | 2016-05-12 | 2016-05-12 | Double-excitation solenoid type particle sensitive detection device adopting full-band filtering |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105891057A true CN105891057A (en) | 2016-08-24 |
Family
ID=56702717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610311409.4A Pending CN105891057A (en) | 2016-05-12 | 2016-05-12 | Double-excitation solenoid type particle sensitive detection device adopting full-band filtering |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105891057A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108465550A (en) * | 2018-02-12 | 2018-08-31 | 徐州德坤电气科技有限公司 | A kind of impurity or foreign body separator of continuous moving medium |
CN108480039A (en) * | 2018-02-12 | 2018-09-04 | 徐州德坤电气科技有限公司 | A kind of impurity or foreign body separator control method of continuous moving medium |
CN109725050A (en) * | 2018-12-14 | 2019-05-07 | 天津大学 | A kind of magnetic induction measurement topological structure with Diamagnetic loop |
CN114137062A (en) * | 2021-11-15 | 2022-03-04 | 大连海事大学 | High-sensitivity and high-flux oil-liquid multi-pollutant detection sensor, detection method and manufacturing method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4878019A (en) * | 1985-05-02 | 1989-10-31 | Aeroquip Corporation | Electrical sensing system for measuring ferrous particles within a fluid with temperature compensation circuit |
CN1546198A (en) * | 2003-11-28 | 2004-11-17 | 邝念曾 | Method and system for purifying hydraulic-oil |
CN101465307A (en) * | 2007-12-17 | 2009-06-24 | 中芯国际集成电路制造(上海)有限公司 | Standard mechanical interface equipment with microparticle adsorption pad |
CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
CN103558127A (en) * | 2013-11-12 | 2014-02-05 | 北京理工大学 | Differential online oil abrasive particle sensor testing system |
CN103998141A (en) * | 2011-12-23 | 2014-08-20 | 曼·胡默尔有限公司 | Centrifugal-force separator and filter arrangement having a centrifugal-force separator of said type |
CN104697905A (en) * | 2015-03-20 | 2015-06-10 | 桂林电子科技大学 | Oil abrasive particle detecting sensor and design method thereof |
CN204461949U (en) * | 2015-03-20 | 2015-07-08 | 桂林电子科技大学 | A kind of oil liquid abrasive grain pick-up unit |
-
2016
- 2016-05-12 CN CN201610311409.4A patent/CN105891057A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4878019A (en) * | 1985-05-02 | 1989-10-31 | Aeroquip Corporation | Electrical sensing system for measuring ferrous particles within a fluid with temperature compensation circuit |
CN1546198A (en) * | 2003-11-28 | 2004-11-17 | 邝念曾 | Method and system for purifying hydraulic-oil |
CN101465307A (en) * | 2007-12-17 | 2009-06-24 | 中芯国际集成电路制造(上海)有限公司 | Standard mechanical interface equipment with microparticle adsorption pad |
CN103998141A (en) * | 2011-12-23 | 2014-08-20 | 曼·胡默尔有限公司 | Centrifugal-force separator and filter arrangement having a centrifugal-force separator of said type |
CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
CN103558127A (en) * | 2013-11-12 | 2014-02-05 | 北京理工大学 | Differential online oil abrasive particle sensor testing system |
CN104697905A (en) * | 2015-03-20 | 2015-06-10 | 桂林电子科技大学 | Oil abrasive particle detecting sensor and design method thereof |
CN204461949U (en) * | 2015-03-20 | 2015-07-08 | 桂林电子科技大学 | A kind of oil liquid abrasive grain pick-up unit |
Non-Patent Citations (2)
Title |
---|
杜润: "液压系统脉动衰减器的特性分析", 《中国博士学位论文全文数据库工程科技Ⅱ辑》 * |
桑青青: "多薄板振动式脉动衰减器滤波机理与特性分析", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108465550A (en) * | 2018-02-12 | 2018-08-31 | 徐州德坤电气科技有限公司 | A kind of impurity or foreign body separator of continuous moving medium |
CN108480039A (en) * | 2018-02-12 | 2018-09-04 | 徐州德坤电气科技有限公司 | A kind of impurity or foreign body separator control method of continuous moving medium |
CN108480039B (en) * | 2018-02-12 | 2020-09-15 | 徐州德坤电气科技有限公司 | Control method of impurity or foreign matter separation device for continuously moving medium |
CN109725050A (en) * | 2018-12-14 | 2019-05-07 | 天津大学 | A kind of magnetic induction measurement topological structure with Diamagnetic loop |
CN114137062A (en) * | 2021-11-15 | 2022-03-04 | 大连海事大学 | High-sensitivity and high-flux oil-liquid multi-pollutant detection sensor, detection method and manufacturing method |
CN114137062B (en) * | 2021-11-15 | 2023-08-25 | 大连海事大学 | High-sensitivity and high-flux oil multi-pollutant detection sensor, detection method and manufacturing method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105891057A (en) | Double-excitation solenoid type particle sensitive detection device adopting full-band filtering | |
CN106053300A (en) | Double excitation solenoid type particle sensitive detection method adopting full band filtering | |
CN205786203U (en) | A kind of microgranule sensitivity detection equipment of full frequency band structure changes operating mode adaptive-filtering | |
CN105865987A (en) | Method for monitoring oil by means of full-frequency-band variable-structure filtering, adsorbing and molding | |
CN205786210U (en) | With operating mode adaptive-filtering, absorption and moulding twin coil Oil Monitoring device | |
CN105973776A (en) | Double-exciting solenoid type particle sensing method adopting working condition adaptive filtering | |
CN106018215A (en) | Double-exciting solenoid type abrasion particle online detecting method with filter | |
CN205786206U (en) | A kind of double excitation solenoid type wear particle on-line detecting system using wave filter | |
CN106018191A (en) | Double-excitation solenoid type particle detection method achieved through full-frequency-band work condition self-adaptive filtering | |
CN205786205U (en) | With full frequency band structure changes operating mode adaptive-filtering and moulding Oil Monitoring equipment | |
CN106018192A (en) | Double-coil oil monitoring method with wave suppression, separation and molding | |
CN106018189A (en) | Particle sensitivity detection method using full-band variable-structure working condition adaptive filtering | |
CN206114472U (en) | Adopt full frequency channel operating mode adaptive filtering , separation and moulding fluid monitoring device | |
CN105954156A (en) | Double-excitation-solenoid particle sensitive device adopting variable-structure working condition adaptive filtering | |
CN105891059A (en) | Double-excitation solenoid type online wear particle detection system adopting filter | |
CN205786207U (en) | A kind of double excitation solenoid type microgranule sensitive equipment of full frequency band structure changes filtering | |
CN106018187A (en) | Double-exciting solenoid type particle online detecting method with variable structure filtering | |
CN105891055A (en) | Particle sensitive detecting equipment using full-band variable structure working condition self-adaptive filtering | |
CN106018217A (en) | Double-exciting solenoid type particle sensitive method with wave suppression | |
CN105865986A (en) | Oil monitoring equipment based on full-band variable-structure working condition adaptive filtering and molding | |
CN105865985A (en) | Double-excitation solenoid type particle online detection system with variable-structure filtering function | |
CN205786204U (en) | Use structure changes filtering, separate and moulding twin coil Oil Monitoring system | |
CN105954167A (en) | Dual exciting solenoid type particle sensitive device adopting working condition adaptive filtering | |
CN106018190A (en) | Oil monitoring method using full-band working condition adaptive filtering, separation and shaping | |
CN105891061A (en) | Liquid oil monitoring device adopting full-band and variable-structure filtering, absorbing and shaping |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |
|
RJ01 | Rejection of invention patent application after publication |