CN109959586A - The granule detecting method and system of suspended particulate in a kind of oil liquid - Google Patents
The granule detecting method and system of suspended particulate in a kind of oil liquid Download PDFInfo
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- CN109959586A CN109959586A CN201910281038.3A CN201910281038A CN109959586A CN 109959586 A CN109959586 A CN 109959586A CN 201910281038 A CN201910281038 A CN 201910281038A CN 109959586 A CN109959586 A CN 109959586A
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- 239000007788 liquid Substances 0.000 title claims abstract description 53
- 239000008187 granular material Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 238000007493 shaping process Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000005286 illumination Methods 0.000 claims description 9
- 230000005622 photoelectricity Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 40
- 238000005259 measurement Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 230000031700 light absorption Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- 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
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The granule detecting method and system of suspended particulate in oil liquid carry out task priority setting to the data processing in detection cycle；Transmitting laser beam makes laser beam pass through the surface that measuring unit is radiated at photodiode, and photodiode receives laser beam and obtains detection pulse signal；Receiving end Edge check is carried out to detection pulse signal, and obtains detection pulse signal amplitude and pulsewidth；Shaping is carried out to detection pulse signal and obtains identification pulse signal, granularity judgement is carried out according to identification pulse signal.Identification pulse data signal is exported to serial line interface or exports to CAN bus and is exported, threshold value of warning is given, when beyond threshold value of warning or lower than threshold value of warning, carries out the exceeded warning of granularity.Identify that analog current output by analog current output test result, is converted to ordinal number and continuously exported in predetermined time frame by analog interface by pulse signal.It avoids the excessively multipair equipment of suspended particulate in oil liquid from damaging, reduces unnecessary maintenance frequency and cost.
Description
Technical field
The present invention relates to a kind of granule detecting method and system of suspended particulate in oil liquid, are related to oil liquid detection technology neck
Domain.
Background technique
With the development of technology, oil contamination detection level measurement will be used wider and wider.Oil liquid is hydraulic system
Working media, the control information of hydraulic system and the transmitting of operation power will be completed by oil liquid, such as hydraulic pump, hydraulic horse
Reach, the working condition of the elements such as various valves and service life it is all closely related with the performance of hydraulic oil.Oil liquid prolonged use
After can contain solid particle, solid particle can accelerate the abrasion of Hydraulic Elements, increase interior leakage, it is serious can card plug element
Movement, causes Hydraulic Elements to damage, to cause Vehicular system failure, influences the safety and stability of vehicle, maintenance needs expend big
The economic cost of amount.Need the technical solution that suspended particulate is detected in a kind of pair of oil liquid.
Summary of the invention
It is an object of that present invention to provide a kind of granule detecting method and system of suspended particulate in oil liquid, based in oil liquid
Suspended particulate judges granularity transmitted through the intensity of illumination after oil liquid by detection laser to the characteristic of scattering and the absorption of light
Size, to realize the real-time online status monitoring to equipment.
The technical scheme to solve the above technical problems is that in a kind of oil liquid suspended particulate granule detecting side
Method is based on laser, measuring unit and photodiode, comprising the following steps:
The given cycle detection period carries out task priority setting to the data processing in the detection cycle；
Emitting laser beam by the laser makes the laser beam be radiated at the photodiode across measuring unit
Surface, photodiode receives the laser beam and obtains detection pulse signal；
Receiving end Edge check is carried out to the detection pulse signal, and obtains the detection pulse signal amplitude and arteries and veins
It is wide；
Shaping is carried out to the detection pulse signal and obtains identification pulse signal, according to identification pulse signal progress
Granularity judgement.
As the preferred embodiment of the granule detecting method of suspended particulate in oil liquid, the laser is arranged in the measurement
The other side of the measuring unit is arranged in the side of unit, the photodiode；The laser is for emitting laser
Beam, the laser beam pass through the surface that the measuring unit is radiated at the photodiode；The photodiode for pair
Light intensity of the laser beam after the suspended particulate of the measuring unit internal flow is detected.
As the preferred embodiment of the granule detecting method of suspended particulate in oil liquid, to the identification pulse signal by matching
The display screen for graphic presentation for being equipped with illumination is shown, carries out keyboard configuration to the display screen for graphic presentation, is examined by keyboard to granularity
Parameter is surveyed to be configured.
As the preferred embodiment of the granule detecting method of suspended particulate in oil liquid, the identification pulse data signal is led
Serial line interface is arrived out or exports to CAN bus and is exported, threshold value of warning is given, when beyond threshold value of warning or lower than threshold value of warning
When, carry out the exceeded warning of granularity.
As the preferred embodiment of the granule detecting method of suspended particulate in oil liquid, the identification pulse signal passes through simulation
Analog current output is converted to ordinal number and is continuously exported in predetermined time frame by analog interface by electric current output test result.
As the preferred embodiment of the granule detecting method of suspended particulate in oil liquid, to analog current output conversion
Ordinal number is verified and is calculated, with the decimal value for each character that character string forms are sent.
The embodiment of the present invention also provides a kind of granule detecting system of suspended particulate in oil liquid, including laser, measurement
The side of the measuring unit is arranged in unit and photodiode, the laser, and the photodiode is arranged described
The other side of measuring unit；For emitting laser beams, the laser beam passes through the measuring unit and is radiated at the laser
The surface of the photodiode；The photodiode is used to pass through the measuring unit internal flow to the laser beam
Light intensity after suspended particulate is detected.
It further include giving module and preferential the period as the preferred embodiment of the granule detecting system of suspended particulate in oil liquid
Grade setting module, the period give the granularity cycle detection period that module is used to give suspended particulate in oil liquid；It is described excellent
First grade setting module is used to carry out task priority setting to the data processing in the detection cycle.
It further include signal detection module and shaping as the preferred embodiment of the granule detecting system of suspended particulate in oil liquid
Module, the signal detection module is used to carry out receiving end Edge check to the detection pulse signal, and obtains the inspection
Survey pulse signal amplitude and pulsewidth；The Shaping Module is used to carry out the detection pulse signal shaping and obtains identification pulse letter
Number, granularity judgement is carried out according to the identification pulse signal.
As the preferred embodiment of the granule detecting system of suspended particulate in oil liquid, to the identification pulse signal by matching
The display screen for graphic presentation for being equipped with illumination is shown, carries out keyboard configuration to the display screen for graphic presentation, is examined by keyboard to granularity
Parameter is surveyed to be configured；The identification pulse data signal is exported to serial line interface or exports to CAN bus and is exported, is given
Determine threshold value of warning, when beyond threshold value of warning or lower than threshold value of warning, carries out the exceeded warning of granularity；The identification pulse signal
By analog current output test result, analog current output is converted into ordinal number and is connected in predetermined time frame by analog interface
Continuous output.
The beneficial effects of the present invention are: in the given cycle detection period, it is excellent to carry out task to the data processing in detection cycle
First grade setting；Emitting laser beam by laser makes laser beam pass through the surface that measuring unit is radiated at photodiode, photoelectricity
Diode receives laser beam and obtains detection pulse signal；Receiving end Edge check is carried out to detection pulse signal, and obtains inspection
Survey pulse signal amplitude and pulsewidth；Shaping is carried out to detection pulse signal and obtains identification pulse signal, according to identification pulse signal
Carry out granularity judgement.The present invention is based on suspended particulates in oil liquid to the characteristic of scattering and the absorption of light, by detecting laser
Granularity size is judged transmitted through the intensity of illumination after oil liquid, to realize to the real-time online status monitoring of equipment, avoids oil
The excessively multipair equipment of suspended particulate damages in liquid, reduces unnecessary maintenance frequency and cost.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Fig. 1 is the granule detecting method flow schematic diagram of suspended particulate in the oil liquid provided in the embodiment of the present invention；
Fig. 2 is the granule detecting system schematic of suspended particulate in the oil liquid provided in the embodiment of the present invention；
Fig. 3 is the granule detecting signal shaping schematic diagram of suspended particulate in the oil liquid provided in the embodiment of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Referring to Fig. 1 and Fig. 3, a kind of granule detecting method of suspended particulate in oil liquid is provided, it is single based on laser, measurement
Member and photodiode, comprising the following steps:
S1: the given cycle detection period carries out task priority setting to the data processing in the detection cycle；
S2: emitting laser beam by the laser makes the laser beam be radiated at two pole of photoelectricity across measuring unit
The surface of pipe, photodiode receive the laser beam and obtain detection pulse signal；
S3: receiving end Edge check is carried out to the detection pulse signal, and obtains the detection pulse signal amplitude
And pulsewidth；
S4: to the detection pulse signal carry out shaping obtain identification pulse signal, according to the identification pulse signal into
The judgement of row granularity.
In oil liquid in one embodiment of the granule detecting method of suspended particulate, the laser is arranged in the measurement
The other side of the measuring unit is arranged in the side of unit, the photodiode；The laser is for emitting laser
Beam, the laser beam pass through the surface that the measuring unit is radiated at the photodiode；The photodiode for pair
Light intensity of the laser beam after the suspended particulate of the measuring unit internal flow is detected.Specifically, laser beam is logical
It crosses measuring unit and reaches opposite photodiode.If particle is by laser beam, the luminous intensity that photodiode detects
It reduces.Particle is bigger, and strength reduction is bigger.Persistently monitoring cleannes can rapidly detect the variation of machine, and warning is prompted to permit
Perhaps it takes measures before pollution increases to damage whole system equipment.
In oil liquid in one embodiment of the granule detecting method of suspended particulate, to the identification pulse signal by matching
The display screen for graphic presentation for being equipped with illumination is shown, carries out keyboard configuration to the display screen for graphic presentation, is examined by keyboard to granularity
Parameter is surveyed to be configured.The identification pulse data signal is exported to serial line interface or exports to CAN bus and is exported, is given
Determine threshold value of warning, when beyond threshold value of warning or lower than threshold value of warning, carries out the exceeded warning of granularity.
In oil liquid in one embodiment of the granule detecting method of suspended particulate, the identification pulse signal passes through simulation
Analog current output is converted to ordinal number and is continuously exported in predetermined time frame by analog interface by electric current output test result.
The ordinal number of analog current output conversion is verified and calculated, with the decimal system for each character that character string forms are sent
Value.
Specifically, measurement result can export (4-20mA) transmission by analog current.It, can be with for standard ISO4406:99
The function of being exported using simulation order data.Four sequences are continuously exported in predetermined time frame by analog interface (4-20MA)
Number.Each sequence is started with 20mA signal, for 4 seconds.
Referring to figs. 2 and 3, the embodiment of the present invention also provides a kind of granule detecting system of suspended particulate in oil liquid, packet
Laser 1, measuring unit 2 and photodiode 3 are included, the side of the measuring unit 2, the light is arranged in the laser 1
The other side of the measuring unit 2 is arranged in electric diode 3；The laser 1 for emitting laser beams, wear by the laser beam
Cross the surface that the measuring unit 2 is radiated at the photodiode 3；The photodiode 3 is for wearing the laser beam
Light intensity after crossing the suspended particulate of 2 internal flow of measuring unit is detected.
Specifically, granule detecting system is connect pressure line, flow direction is arbitrary, and at tie point, should preferably be had
There is constant pressure condition.Pressure may be different, but must not have pressure peak or surging.Volume flow must be permanent
It is fixed, between 50 and 400ml/min.Always flow control or decompression are installed in the downstream of granule detecting system, because this
Turbulent flow or bubble can be generated, a bit so as to cause measurement error.Required flow is generated if necessary to pump, then should be low pulse
Pump, it should be mounted in pressure piping, because the negative pressure of suction side will lead to bubble, so as to cause measurement error.If system
In there is bubble, then can generate one be about hose form tranquil part.
It further include giving module 4 and excellent in the period in oil liquid in one embodiment of the granule detecting system of suspended particulate
First grade setting module 5, the period give the granularity cycle detection period that module 4 is used to give suspended particulate in oil liquid；Institute
Priority level initializing module 5 is stated for carrying out task priority setting to the data processing in the detection cycle.
It further include signal detection module 6 and whole in oil liquid in one embodiment of the granule detecting system of suspended particulate
Shape module 7, the signal detection module 6 is used to carry out receiving end Edge check to the detection pulse signal, and obtains institute
State detection pulse signal amplitude and pulsewidth；The Shaping Module 7 is used to carry out shaping to the detection pulse signal to obtain identification
Pulse signal carries out granularity judgement according to the identification pulse signal.
In oil liquid in one embodiment of the granule detecting system of suspended particulate, to the identification pulse signal by matching
The display screen for graphic presentation 8 for being equipped with illumination is shown, is carried out keyboard 9 to the display screen for graphic presentation 8 and is configured, by keyboard 9 to particle
Degree detection parameters are configured；The identification pulse data signal is exported into serial line interface or export to CAN bus carry out it is defeated
Out, threshold value of warning is given, when beyond threshold value of warning or lower than threshold value of warning, carries out the exceeded warning of granularity；The identification arteries and veins
Signal is rushed by analog current output test result, analog current output is converted into ordinal number by analog interface in the predetermined time
It is continuously exported in frame.
Specifically, granule detecting system should be mounted on and be easy in order to read graphic alphanumeric display and use keyboard 9
Close position.With the length of hose, the risk of larger particles sedimentation increases.In addition, especially in viscosity higher and use
When hose, it is necessary to ensure that the sufficiently high flow to generate 50 to 400ml/min of pressure.Connection can be carried out by other connectors
Exchange.Maximum screw-down torque must not exceed 25Nm.When replacing jointing, there must not be dust, clast or other pollutants enter
Inside equipment.
Specifically, the signal received is expressed as r0(n) (n=0,1 ...).It is smoothly received by low-pass filter
Signal, impulse response coefficient are expressed as h (n) (n=0,1 ...).Then, the amplitude of filtering signal can be usedIt indicates, the search from maximum search to minimum can be passed through using positive edge detection algorithm
Trickle amendment is suitable for negative edge and detects.
1): parameter initialization
N0, n=1, δc=-1, δm=0, var_N0=0
Wherein N0It is some integer, n is the index for receiving sequence, δcIt is r0(n) threshold value that (n=0,1 ...) is defined just
Initial value, δmIt is the local maximum for refreshing, var_N0It is as meeting r0(n) measurement of (n=0,1 ...) conditional connects
Continue the variable of number.
2): if (((Mc(n) > Mc(n-1))and(Mc(n) > Mc(n+1))))
if(Mc(n) > δm)
{δm=Mc(n)；}
Goto step3；s
else
Goto step4；
3):
if(δc==- 1)
{δc=Mc(n)；δm=Mc(n)；}
Goto step4；
4):
if(Mc(n) > δc)
{var_N0=var_N0+1；
if(var_N0> N0)
{n0=n；STS or frame arrives and returns；}
else
{var_N0=0；}}
else
{δc=δm；N=n+1；Goto step2；}
The present invention gives the cycle detection period, carries out task priority setting to the data processing in detection cycle；Pass through
Laser 1, which emits laser beam, makes laser beam pass through the surface that measuring unit 2 is radiated at photodiode 3, and photodiode 3 receives
Laser beam obtains detection pulse signal；Receiving end Edge check is carried out to detection pulse signal, and obtains detection pulse signal
Amplitude and pulsewidth；Shaping is carried out to detection pulse signal and obtains identification pulse signal, granularity is carried out according to identification pulse signal
Judgement.The present invention is based on suspended particulates in oil liquid to the characteristic of scattering and the absorption of light, by detecting laser transmitted through oil liquid
Intensity of illumination afterwards judges granularity size, to realize the real-time online status monitoring to equipment, avoids suspension in oil liquid
The excessively multipair equipment of grain damages, and reduces unnecessary maintenance frequency and cost.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of granule detecting method of suspended particulate in oil liquid is based on laser, measuring unit and photodiode, special
Sign is, comprising the following steps:
The given cycle detection period carries out task priority setting to the data processing in the detection cycle；
Emitting laser beam by the laser makes the laser beam pass through the table that measuring unit is radiated at the photodiode
Face, photodiode receive the laser beam and obtain detection pulse signal；
Receiving end Edge check is carried out to the detection pulse signal, and obtains the detection pulse signal amplitude and pulsewidth；
Shaping is carried out to the detection pulse signal and obtains identification pulse signal, granularity is carried out according to the identification pulse signal
Judgement.
2. the granule detecting method of suspended particulate in a kind of oil liquid according to claim 1, which is characterized in that described to swash
The side of the measuring unit is arranged in light device, and the other side of the measuring unit is arranged in the photodiode；It is described
For emitting laser beams, the laser beam passes through the surface that the measuring unit is radiated at the photodiode to laser；Institute
Light intensity after stating suspended particulate of the photodiode for passing through the measuring unit internal flow to the laser beam is examined
It surveys.
3. the granule detecting method of suspended particulate in a kind of oil liquid according to claim 1, which is characterized in that described
Identification pulse signal is shown by the display screen for graphic presentation configured with illumination, carries out keyboard configuration to the display screen for graphic presentation,
Granule detecting parameter is configured by keyboard.
4. the granule detecting method of suspended particulate in a kind of oil liquid according to claim 1, which is characterized in that will be described
Identification pulse data signal, which exports to serial line interface or exports to CAN bus, to be exported, and threshold value of warning is given, when beyond early warning
Threshold value or be lower than threshold value of warning when, carry out the exceeded warning of granularity.
5. the granule detecting method of suspended particulate in a kind of oil liquid according to claim 1, which is characterized in that the knowledge
Other pulse signal is converted to ordinal number by analog interface predetermined by analog current output test result, by analog current output
It is continuously exported in time frame.
6. the granule detecting method of suspended particulate in a kind of oil liquid according to claim 5, which is characterized in that described
The ordinal number of analog current output conversion is verified and is calculated, with the decimal value for each character that character string forms are sent.
7. the granule detecting system of suspended particulate in a kind of oil liquid, which is characterized in that including laser, measuring unit and photoelectricity
The side of the measuring unit is arranged in diode, the laser, and the measuring unit is arranged in the photodiode
Other side；For emitting laser beams, the laser beam passes through the measuring unit and is radiated at the photoelectricity two laser
The surface of pole pipe；After the photodiode is used to pass through the laser beam suspended particulate of the measuring unit internal flow
Light intensity detected.
8. the granule detecting system of suspended particulate in a kind of oil liquid according to claim 7, which is characterized in that further include
Period gives module and priority level initializing module, and the period gives module and follows for giving the granularity of suspended particulate in oil liquid
Ring detection cycle；The priority level initializing module is used to carry out task priority to the data processing in the detection cycle to set
It is fixed.
9. the granule detecting system of suspended particulate in a kind of oil liquid according to claim 7, which is characterized in that further include
Signal detection module and Shaping Module, the signal detection module are used to carry out the inspection of receiving end edge to the detection pulse signal
It surveys, and obtains the detection pulse signal amplitude and pulsewidth；The Shaping Module is used to carry out the detection pulse signal
Shaping obtains identification pulse signal, carries out granularity judgement according to the identification pulse signal.
10. the granule detecting system of suspended particulate in a kind of oil liquid according to claim 7, which is characterized in that institute
It states identification pulse signal to be shown by the display screen for graphic presentation configured with illumination, keyboard is carried out to the display screen for graphic presentation and is matched
It sets, granule detecting parameter is configured by keyboard；The identification pulse data signal is exported into serial line interface or is led
CAN bus is arrived out to be exported, threshold value of warning is given, and when beyond threshold value of warning or lower than threshold value of warning, it is super to carry out granularity
Mark warning；Analog current output is converted to ordinal number and is passed through by the identification pulse signal by analog current output test result
Analog interface continuously exports in predetermined time frame.
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| CN201910281038.3A CN109959586B (en) | 2019-04-09 | 2019-04-09 | Method and system for detecting granularity of suspended particles in oil |
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| CN201910281038.3A CN109959586B (en) | 2019-04-09 | 2019-04-09 | Method and system for detecting granularity of suspended particles in oil |
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