CN204827597U - Multisensor information fusion's machine oil quality on -line monitoring system - Google Patents
Multisensor information fusion's machine oil quality on -line monitoring system Download PDFInfo
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Abstract
The utility model discloses a multisensor information fusion's machine oil quality on -line monitoring system. This system is observed and controled host computer, man -machine dialogue module etc. And is formed by test oil circuit control valve, metal grit detection device, comprehensive quality detection device, viscosity detection device, machine oil cooling device, data processing module, STM32. Wherein the viscosity detection device comprises machine oil sampling device, constant temperature oil bath case, heater, constant flow pump, level sensor, oil bath temperature sensor, sample temperature sensor, pressure sensor, balanced flow sensor and pressure control valve. This ystem installation is in the low reaches of the lubricated oil circuit oil pump of automobile engine, can on -line monitoring machine oil viscosity, the pH valve of the content of metal grit and machine oil, water content etc. Synthesize the change of quality to adopt multisensor information fusion technique integrated analysis oil state, demonstrate oil state information through the display, send the early -warning singal in case of necessity.
Description
Technical field
The utility model relates to technical field of vehicle, specifically a kind of machine oil quality on-line monitoring system of multi-sensor information fusion.
Background technique
According to statistics, automobile engine oil accounts for less than a thousandth in the user cost of automobile, but to the aging effects of automobile much larger than 10%, reasonable lubrication can reduce 25% of vehicle maintenance cost.Machine oil in use for some time, due to introduced contaminants be mixed into and the oxidation of machine oil self, the reason such as decomposition and cohesion, its quality changes, greasy property declines, cause parts wear to aggravate, engine power performance declines, and causes vehicle generation catastrophe failure time serious.Therefore, to being very necessary with the monitoring of machine oil quality, the rational replacing construction of machine oil can be determined like this, reducing because machine oil goes bad the fault that causes or change the wasting of resources caused because machine oil is less than lifetime.
Present Domestic major part user still continues to use the traditional mode of " observation is changed oil " or " on schedule changing oil " to automobile oil, namely observe by rule of thumb and subjective judgement or determine the moment of changing oil according to lubricant oil life cycle.In addition, be exactly the oil monitoring and analysis method of off-line sampling, the mode namely specify by standard and sampling interval time carry out the collection of machine oil sample, then the machine oil sample of collection are sent to professional detection department, are analyzed by department professional workforce to it.But off-line sample analysis needs to use expensive precision type instrument, and there are significant limitation, the problem that ageing and whether sampling fluid is representative.Like this, not only really do not pinpoint the problems in time, also consumes large quantities of man power and material simultaneously.
In recent years, the on-line monitoring technique of automobile engine oil causes the concern of people more and more, publication No.: CN203374340U, title: a kind of Chinese patent of engine motor oil warning device, adopt the change of viscosity and temperature transducer difference monitoring machine oil viscosity and temperature, but can not detect the content of metal worn particle and the integrated quality change of machine oil, monitoring result lacks accuracy.Notification number: CN2554632Y, title: the Chinese patent of intelligent oil quality monitoring instrument, by different sensors monitoring machine oil viscosity, temperature and permittivity respectively, the integrated quality of machine oil is obtained by information fusion technology, but because it adopts high frequency oscillation measuring circuit easily to produce high-frequency magnetic field, thus very large impact is caused on the measuring accuracy of capacitive transducer.Publication No.: CN10283085A, title: the Chinese patent of the device for detecting performance of engine motor oil, by parameters such as capacitive transducer and infrared senor monitoring machine oil viscosity, moisture, acid number and metallic content, feed back to user finally by display unit.When the above-mentioned device related to is monitored engine oil viscosity, all do not meet the probe temperature requirement of 100 DEG C of GB GBT8028-2010 regulation, principle of measurement existing defects, the measurement result of engine oil viscosity has very big error.
Summary of the invention
It is simple that the utility model provides a kind of structure, can under standard environment (standard temperature, standard pressure) on-line real time monitoring at the machine oil on-line monitoring system changed with machine oil viscosity, metallic content and the integrated quality such as pH value, moisture content, and adopt multi-sensor information fusion technology, comprehensive analysis oil conditions, judge oil pollution degree, and demonstrate oil conditions information by display device, send the machine oil quality on-line monitoring system of prompting and early warning signal if desired.
Technical solutions of the utility model accompanying drawings is as follows:
A kind of machine oil quality on-line monitoring system of multi-sensor information fusion, this system is installed on the downstream of lubricating oil way of automobile engine oil pump 1, comprises test oil passage control valve 2, metal worn particle detection device 3, integrated quality detection device 5, viscosity detecting device, machine oil cooler 17, data processing module 18, measurement and control host computer 19 and human-computer dialogue module; Wherein said test oil passage control valve 2 is connected with metal worn particle detection device 3, integrated quality detection device 4, viscosity detecting device, machine oil cooler 17 successively by oil circuit; Liquid level sensor 8 in described metal worn particle detection device 3, integrated quality detection device 5, viscosity detecting device, oil bath temperature sensor 9, probe temperature sensor 10, pressure transducer (14), balanced flow sensor 15 are electrically connected with data processing module 18; Data processing module 18 is electrically connected with the input port of measurement and control host computer 19; The output terminal of measurement and control host computer 19 and human-computer dialogue module and test oil passage control valve 2 and be electrically connected; Described metal worn particle detection device 3 is outside equipped with outside the first screening arrangement 4, integrated quality detection device 5 and is provided with secondary shielding device 6; Described human-computer dialogue module comprises prior-warning device 20 and display device 21.
Described test oil passage control valve 2 is arranged on the branch road in parallel with working connection 22, and its one end, downstream passes into machine oil sampler 17; Described machine oil cooler 17 downstream passes into oil sump 23.
Described metal worn particle detection device 3 adopts Double-coil type inductive pickup, and its structure is made up of inductor coil L1, Reference coil L2, resistance R1 and resistance R2; Wherein said inductor coil L1 connects with resistance R1, and Reference coil L2 connects with resistance R2, receives excitation source two ends by after above-mentioned two lines in parallel; Be full of oil circuit to be measured in inductor coil L1, resistance R1 and resistance R2 is the balance arm of electric bridge.
Described integrated quality detection device 5 adopts dielectric constant sensor, the pipe 25 that its structure is respectively r and R by an interior outer radius forms with the two semicircular arc-shaped electrode 26 being close to this pipe 25 outer wall, the material of pipe 25 is perfluoroethylene-propylene, and the material of electrode 26 is metallic copper.
The first described screening arrangement 4 and secondary shielding device 6 all adopt the metallic aluminium screening can with high conductivity and low magnetic permeability.
Described viscosity detecting device also comprises machine oil sampler 12, thermostatical oil bath cabinet 11, heater 7, constant flow pump 13 and pressure controlled valve 16; Wherein said heater 7, oil bath temperature sensor 9 and machine oil sampler 12 are arranged in thermostatical oil bath cabinet 11, and described liquid level sensor 8 and probe temperature sensor 10 are arranged in machine oil sampler 12; The upstream of described constant flow pump 13 passes into machine oil sampler 12; The direction that described constant flow pump 13 transmits according to machine oil is connected with pressure controlled valve 16 with pressure transducer 14, balanced flow sensor 15 successively by oil circuit; Described liquid level sensor 8, oil bath temperature sensor 9, probe temperature sensor 10, pressure transducer 14, balanced flow sensor 15 are connected with measurement and control host computer 19 input port by data processing module 18; Described constant flow pump 13, heater 7 are connected with measurement and control host computer 19 output port by data processing module 18 with pressure controlled valve (16).
The beneficial effects of the utility model are: (1) the utility model adopts the many index of multisensor to machine oil to measure, and carries out overall merit by information fusion technology to machine oil quality; (2) the utility model installs screening arrangement additional to metallic detection device and integrated quality detection device, masks magnetic field and electric field to the interference of sensor, reduces measurement error; (3) the utility model can build the temperature environment of 100 DEG C that specify in the standard of changing oil, and measures in this environment to engine oil viscosity, improves the testing precision of engine oil viscosity.Pass to STM32 measurement and control host computer after the information monitored being processed by data processing module, finally feed back to user by display device and prior-warning device.
Accompanying drawing explanation
Fig. 1 is the structural representation of the machine oil quality on-line monitoring system of the utility model multi-sensor information fusion;
Fig. 2 is the machine oil quality on-line monitoring system dielectric constant sensor cross sectional representation of the utility model multi-sensor information fusion;
Fig. 3 is the machine oil quality on-line monitoring system metallic detection device Cleaning Principle circuit diagram of the utility model multi-sensor information fusion;
Fig. 4 is the multi-sensor information fusion structural drawing of the machine oil quality on-line monitoring system of the utility model multi-sensor information fusion;
Fig. 5 is the workflow diagram of the monitoring method of the machine oil quality on-line monitoring system of the utility model multi-sensor information fusion.
In figure, 1, oil pump; 2, oil passage control valve is tested; 3, metal worn particle detection device; 4, the first screening arrangement; 5, integrated quality detection device; 6, secondary shielding device; 7, heater; 8, liquid level sensor; 9, oil bath temperature sensor; 10, probe temperature sensor; 11, thermostatical oil bath cabinet; 12, machine oil sampler; 13, constant flow pump; 14, pressure transducer; 15, balanced flow sensor; 16, pressure controlled valve; 17, machine oil cooler; 18, data processing module; 19, measurement and control host computer; 20, prior-warning device; 21, display device; 22, working connection; 23, oil sump; 24, fuel filter; 25, pipe; 26, electrode.
Embodiment
Consult Fig. 1, a kind of machine oil quality on-line monitoring system of multi-sensor information fusion, this system is installed on the downstream of lubricating oil way of automobile engine oil pump 1; Comprise test oil passage control valve 2, metal worn particle detection device 3, integrated quality detection device 5, viscosity detecting device, machine oil cooler 17, data processing module 18, measurement and control host computer 19 and human-computer dialogue module; Wherein said test oil passage control valve 2 is connected with metal worn particle detection device 3, integrated quality detection device 4, viscosity detecting device, machine oil cooler 17 successively by oil circuit; Liquid level sensor 8 in described metal worn particle detection device 3, integrated quality detection device 5, viscosity detecting device, oil bath temperature sensor 9, probe temperature sensor 10, pressure transducer (14), balanced flow sensor 15 are electrically connected with data processing module 18; Data processing module 18 is electrically connected with the input port of measurement and control host computer 19; The output terminal of measurement and control host computer 19 and human-computer dialogue module and test oil passage control valve 2 and be electrically connected; Described metal worn particle detection device 3 is outside equipped with outside the first screening arrangement 4, integrated quality detection device 5 and is provided with secondary shielding device 6; Described human-computer dialogue module comprises prior-warning device 20 and display device 21.
Measurement and control host computer 19 selects model STM32.
Described test oil passage control valve 2 is arranged on the branch road in parallel with working connection 22, and its one end, downstream passes into machine oil sampler 17, is controlled the break-make of this branch road by test oil passage control valve 2; Described machine oil cooler 17 downstream passes into oil sump 23.
Consult Fig. 3, described metal worn particle detection device 3 is used for detecting metallic content in machine oil, and adopt Double-coil type inductive pickup, its structure is made up of inductor coil L1, Reference coil L2, resistance R1 and resistance R2; Wherein said inductor coil L1 connects with resistance R1, and Reference coil L2 connects with resistance R2, receives excitation source two ends by after above-mentioned two lines in parallel; Be full of oil circuit to be measured in inductor coil L1, resistance R1 and resistance R2 is the balance arm of electric bridge.
Its Cleaning Principle is: due to the effect of electromagnetic induction, the change of coil permeability can be caused during the magnetic field of metal worn particle by inductance type spiral winding, thus its inductance value is changed, and then cause the induced signal of inductor coil to change, amplitude of variation is relevant with the total volume of metal worn particle, determine the content of the metal worn particle by spiral winding thus, be delivered to measurement and control host computer 19 through data processing module 18.When oil circuit to be measured flows through without metallic, exporting electromotive force e is zero; Therefore, when having metallic to flow through in oil circuit to be measured, the inductance of inductor coil L1 will change, and cause exporting electromotive force e and change.
Consulting Fig. 1, being provided with the secondary shielding device for shielding external signal, its material adopts the metallic aluminium of high conductivity and low magnetic permeability, to reach the shielding object to high frequency magnetic field and LCF.
Consult Fig. 2, described integrated quality detection device 5 is used for detecting the integrated quality of machine oil, such as: pH value, moisture content, iron content etc., adopt dielectric constant sensor, the pipe 25 that its structure is respectively r and R by an interior outer radius forms with the two semicircular arc-shaped electrode 26 being close to this pipe 25 outer wall, two halves circular arc pole plate internal surface forms capacitor, and during use, machine oil is flow through by pipe inner chamber.This sensor construction has the following advantages: one is that columnar structure is very easily directly connected with oil line pipe, installs simple, just with realize on-line monitoring; Two is that machine oil and pole plate separate by pipe, and machine oil can not contact with metal polar plate, reduces the corrosive action to pole plate; Finally, due to the attached power of weak parent of machine oil and nonmetal tube wall, under oil pressure in certain main oil gallery, flow velocity effect, be deposited on oil film in pipe and sediments is easy to be rinsed, prevent sediments in traditional dielectric constant sensor to be attached to drawback pole plate affecting measurement sensistivity.
The material of pipe 25 is perfluoroethylene-propylene (FEP), and perfluoroethylene-propylene has following properties: 1. ease of processing: melt-processable, easy to make; 2. resistant of high or low temperature: little on the impact change of temperature, temperature range scope is wide, and Long-Time Service temperature is-195 DEG C ~ 200 DEG C; 3. corrosion-resistant: perfluoroethylene-propylene corrodes by any chemical reagent hardly; 4. hypotonicity: the permeability that gas and liquid pass through perfluoroethylene-propylene is extremely low; 5. high-lubricity: there is friction ractor (0.04) minimum in plastics; 6. surface not viscosity: known solid material all can not stick on the surface is the minimum solid material of a kind of surface energy; The above characteristic of teflon, meets the requirement of dielectric constant sensor to tube wall completely.
The material of electrode 26 is metallic copper, because metallic copper has good processing technology, cost is low, temperature coefficient is low, good toughness, the advantage such as wear-resistant.
Integrated quality detection device 5 outside is provided with the secondary shielding device for shielding external signal, and its material adopts the metallic aluminium of high conductivity and low magnetic permeability, to reach the shielding object to high frequency magnetic field and LCF.
Its Cleaning Principle is: when machine oil goes bad, and hydrocarbon partial is oxidized, and its molecular polarity changes.Such as: after having water to enter, OH is produced
-and H
+ion; Infiltrate organic acid, can RCOO be produced
-and H
+ion; Enter metallic, just have free electron and produce.When the machine oil containing polar molecule flows through dielectric constant sensor, the capacitance of dielectric constant sensor increases ε
rdoubly.By measuring the variable quantity of electric capacity, wherein dielectric permittivity ε just can be reflected
rsituation of change.Therefore when using machine oil as the dielectrics of dielectric constant sensor, by measuring ε
rchange, the degradation of machine oil can be reflected.
Consult Fig. 1, described viscosity detecting device comprises machine oil sampler 12, thermostatical oil bath cabinet 11, heater 7, constant flow pump 13, liquid level sensor 8, oil bath temperature sensor 9, probe temperature sensor 10, pressure transducer 14, balanced flow sensor 15 and pressure controlled valve 16; Wherein said heater 7, oil bath temperature sensor 9 and machine oil sampler 12 are arranged in thermostatical oil bath cabinet 11, and described liquid level sensor 8 and probe temperature sensor 10 are arranged in machine oil sampler 12; The upstream of described constant flow pump 13 passes into machine oil sampler 12; The direction that described constant flow pump 13 transmits according to machine oil is connected with pressure controlled valve 16 with pressure transducer 14, balanced flow sensor 15 successively by oil circuit; Described liquid level sensor 8, oil bath temperature sensor 9, probe temperature sensor 10, pressure transducer 14, balanced flow sensor 15 are connected with measurement and control host computer 19 input port by data processing module 18; Described constant flow pump 13, heater 7 are connected with measurement and control host computer 19 output port by data processing module 18 with pressure controlled valve (16).Wherein, the machine oil heating in machine oil sampler 12 to 100 DEG C, is built the environment of standard temperature by thermostatical oil bath cabinet 11; Constant flow pump 13 operates subsequently, pressure controlled valve 16 is started working, at constant flow pump 13 with under the effect of pressure controlled valve 16, build the machine oil environment (simulated engine machine oil actual working pressure environment) of a standard atmospheric pressure, pressure transducer 14 Real-Time Monitoring engine oil pressure between constant flow pump 13, pressure controlled valve 16, makes it keep at normal atmospheric pressure.
Machine oil cooler is arranged on pressure controlled valve downstream along oil feed line, after suitably being cooled by the machine oil of sampling, flow back to oil sump.
Consult Fig. 4, a kind of monitoring method of machine oil quality on-line monitoring system of multi-sensor information fusion, concrete steps are as follows:
Step one, metal worn particle content, integrated quality detects and sampling: first, machine oil is not had in machine oil sampler 12, liquid level sensor 8 detects that the liquid level height in machine oil sampler is less than minimum, and be delivered to measurement and control host computer 19 after this information being processed by data processing module 18, measurement and control host computer 19 controls test oil passage control valve 2 and opens (now constant flow pump 13 does not work), machine oil in oil sump 23 is carried through the downstream of the backward branch road of preliminary filtration of fuel filter 24 by oil pump 1, when machine oil flows through metal worn particle detection device 3, Double-coil type inductive pickup detects by the difference of inductance value change between inductor coil and Reference coil the metal worn particle content flowing through inductor coil, and be delivered to measurement and control host computer 19 after being processed by data processing module 18 by the signal detected, measurement and control host computer 19 calculates the content of metallic, machine oil then flows through integrated quality detection device 5, at this moment, tubular capacitor sensor flows through by detecting the integrated quality (pH value, moisture content, iron content etc.) that the dielectric constant values of machine oil between pole plate judges machine oil, and passing to measurement and control host computer 19 after being processed by data processing module 18 by the signal detected, measurement and control host computer 19 calculates the integrated quality of machine oil.After machine oil flows through metal worn particle detection device 3 and integrated quality detection device 5, be transported in machine oil sampler 12 along oil circuit, when the liquid level height that liquid level sensor 8 detects in machine oil sampler 12 reaches maximum value, measurement and control host computer 19 controls test oil passage control valve 2 and closes, and sampling process terminates.
Step 2, construction standard temperature: after sampling process terminates, heater 7 is started working.Be arranged in the oil bath temperature sensor 9 Real-Time Monitoring oil bath temperature of thermostatical oil bath cabinet 11, be arranged in the probe temperature sensor 10 Real-Time Monitoring machine oil sample oil temperature of machine oil sampler 12, now by appearance two kinds of possibilities.The first possibility: oil bath temperature not yet reaches 150 DEG C, and machine oil sample oil temperature has reached 100 DEG C, at this moment, the machine oil sample oil temperature signal collected is transported to measurement and control host computer 19 via data processing module 18 by probe temperature sensor 10, measurement and control host computer 19 recognizes after this temperature signal reaches threshold value, and control heater 7 quits work; The second possibility: when oil bath temperature reaches 150 DEG C, and machine oil sample oil temperature does not reach 100 DEG C, dimethicone is caused to be vaporized or flash burn for preventing continuing heating, now the oil bath temperature signal collected is transported to measurement and control host computer 19 via data processing module 18 by oil bath temperature sensor 9, measurement and control host computer 19 recognizes after this temperature signal reaches threshold value, control heater 7 quits work, now, the oil bath of 150 DEG C is heated to the machine oil sample oil not yet reaching 100 DEG C, until probe temperature sensor 10 detects that machine oil sample oil temperature reaches 100 DEG C.
Step 3, analog operation pressure: when probe temperature sensor 10 detects that machine oil sample oil temperature reaches 100 DEG C, STM32 measurement and control host computer 19 controls constant flow pump 13 and pressure controlled valve 16 is started working, and constant flow pump 13 is by the machine oil sample of 100 DEG C of machine oil sampler 12 li oil downstream transport.Due to the effect of constant flow pump 13 and pressure controlled valve 16, machine oil therebetween in pipeline is controlled in standard atmosphere pressure, pipeline inner engine oil pressure monitored by pressure transducer 14, Real-time Feedback is to measurement and control host computer 19, once oil pressure is unstable, measurement and control host computer 19 regulates the oil pressure in pipeline by control constant flow pump 13 and pressure controlled valve 16, machine oil is kept at normal atmospheric pressure.
Step 4, engine oil viscosity detect: when machine oil flows through balanced flow sensor 15, balanced flow sensor 15 detects oil flow rate signal, and this signal is delivered to measurement and control host computer 19 after data processing module 18 processes, measurement and control host computer 19 is according to relational model formula:
V (x)=-0.002x
3+ 1.0769x
2-203.22x+14210 calculates the kinematical viscosity value of machine oil,
Wherein, v is in the kinematical viscosity value with machine oil, and x is oil flow rate;
And according to formula:
obtain the kinematical viscosity variance ratio of machine oil further.Wherein vi is in the kinematical viscosity value with machine oil, is tried to achieve by formula V (x); V
0for the kinematical viscosity value of fresh oil, it is known quantity; η is the kinematical viscosity variance ratio of machine oil, and carries out com-parison and analysis with existing standard, and it is qualified to determine whether;
Step 5, cooling for reflux: machine oil flows through machine oil cooler 17, flow back to oil sump 23 after cooling;
Step 6, information fusion: because artificial intelligence neural networks fully can approach any complex nonlinear relation, zmodem, measurement and control host computer 19 is by engine oil viscosity information under the standard state of storage, metallic content information, integrated quality information carries out data fusion by BP network algorithm, because native system is all detect engine oil viscosity under standard temperature (100 DEG C), there is not the problem of temperature correction to engine oil viscosity and gamma correction, therefore one-level BP blending algorithm is adopted, from multi information angle oil conditions judged and classify, and compare with examination criteria, draw the state that machine oil is current.
Consult Fig. 4, the core concept of BP algorithm is: by output error with some form by hidden layer to input layer successively anti-pass, error distribution is given all unit of each layer, to revise the weights of each unit, namely a kind of " forward-propagating of signal ", " backpropagation of error " process, the forward-propagating process of signal is: input amendment-> input layer-> each hidden layer-> output layer; The back-propagation process of error is: error represents at each layer with some form, revises each layer unit weights, until the error that network exports reduces to acceptable degree.Before system uses, need to adopt MATLAB Neural Network Toolbox to train sample data;
Step 7, display, early warning: after the current state of measurement and control host computer 19 pairs of machine oil judges, judged result (normal, light contamination, severe contamination and scrap) is exported by display device, when judged result be severe contamination or scrap time, prior-warning device will send alarm of changing oil.
The utility model can under standard environment (standard temperature, standard pressure) on-line real time monitoring at the machine oil on-line monitoring system changed with machine oil viscosity, metallic content and the integrated quality such as pH value, moisture content, and adopt multi-sensor information fusion technology, comprehensive analysis oil conditions, judge oil pollution degree, and demonstrate oil conditions information by display device, send prompting and early warning signal if desired.
Claims (6)
1. the machine oil quality on-line monitoring system of a multi-sensor information fusion, it is characterized in that, this system is installed on the downstream of lubricating oil way of automobile engine oil pump (1), comprises test oil passage control valve (2), metal worn particle detection device (3), integrated quality detection device (5), viscosity detecting device, machine oil cooler (17), data processing module (18), measurement and control host computer (19) and human-computer dialogue module; Wherein said test oil passage control valve (2) is connected with metal worn particle detection device (3), integrated quality detection device (4), viscosity detecting device, machine oil cooler (17) successively by oil circuit; Liquid level sensor (8) in described metal worn particle detection device (3), integrated quality detection device (5), viscosity detecting device, oil bath temperature sensor (9), probe temperature sensor (10), pressure transducer (14), balanced flow sensor (15) are electrically connected with data processing module (18); Data processing module (18) is electrically connected with the input port of measurement and control host computer (19); The output terminal of measurement and control host computer (19) and human-computer dialogue module and test oil passage control valve (2) and be electrically connected; Described metal worn particle detection device (3) is outside equipped with outside the first screening arrangement (4), integrated quality detection device (5) and is provided with secondary shielding device (6); Described human-computer dialogue module comprises prior-warning device (20) and display device (21).
2. the machine oil quality on-line monitoring system of a kind of multi-sensor information fusion according to claim 1, it is characterized in that, described test oil passage control valve (2) is arranged on the branch road in parallel with working connection (22), and its one end, downstream passes into machine oil sampler (17); Described machine oil cooler (17) downstream passes into oil sump (23).
3. the machine oil quality on-line monitoring system of a kind of multi-sensor information fusion according to claim 1, it is characterized in that, described metal worn particle detection device (3) adopts Double-coil type inductive pickup, and its structure is made up of inductor coil L1, Reference coil L2, resistance R1 and resistance R2; Wherein said inductor coil L1 connects with resistance R1, and Reference coil L2 connects with resistance R2, receives excitation source two ends by after above-mentioned two lines in parallel; Be full of oil circuit to be measured in inductor coil L1, resistance R1 and resistance R2 is the balance arm of electric bridge.
4. the machine oil quality on-line monitoring system of a kind of multi-sensor information fusion according to claim 1, it is characterized in that, described integrated quality detection device (5) adopts dielectric constant sensor, its structure is respectively r and R pipe (25) by an interior outer radius forms with the two semicircular arc-shaped electrode (26) being close to this pipe (25) outer wall, the material of pipe (25) is perfluoroethylene-propylene, and the material of electrode (26) is metallic copper.
5. the machine oil quality on-line monitoring system of a kind of multi-sensor information fusion according to claim 1, is characterized in that, described the first screening arrangement (4) and secondary shielding device (6) all adopt metallic aluminium screening can.
6. the machine oil quality on-line monitoring system of a kind of multi-sensor information fusion according to claim 1, it is characterized in that, described viscosity detecting device also comprises machine oil sampler (12), thermostatical oil bath cabinet (11), heater (7), constant flow pump (13) and pressure controlled valve (16); Wherein said heater (7), oil bath temperature sensor (9) and machine oil sampler (12) are arranged in thermostatical oil bath cabinet (11), and described liquid level sensor (8) and probe temperature sensor (10) are arranged in machine oil sampler (12); The upstream of described constant flow pump (13) passes into machine oil sampler (12); The direction that described constant flow pump (13) transmits according to machine oil is connected with pressure controlled valve (16) with pressure transducer (14), balanced flow sensor (15) successively by oil circuit; Described liquid level sensor (8), oil bath temperature sensor (9), probe temperature sensor (10), pressure transducer (14), balanced flow sensor (15) are connected with measurement and control host computer (19) input port by data processing module (18); Described constant flow pump (13), heater (7) are connected with measurement and control host computer (19) output port by data processing module (18) with pressure controlled valve (16).
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| CN105065085A (en) * | 2015-07-31 | 2015-11-18 | 吉林大学 | On-line engine oil quality monitoring system and method adopting multi-sensor information fusion |
| CN106482938A (en) * | 2016-10-14 | 2017-03-08 | 温州大学 | Brake fluid system multi-source fusion fault predicting method based on GA BP network |
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| CN106482938A (en) * | 2016-10-14 | 2017-03-08 | 温州大学 | Brake fluid system multi-source fusion fault predicting method based on GA BP network |
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| CN108674092A (en) * | 2018-04-28 | 2018-10-19 | 徐州美驰车桥有限公司 | Controllable lubricating oil temperature and the vehicle bridge and control method for monitoring quality of lubrication oil |
| CN108674092B (en) * | 2018-04-28 | 2023-11-10 | 徐州美驰车桥有限公司 | Axle capable of controlling temperature of lubricating oil and monitoring quality of lubricating oil and control method |
| CN108613899A (en) * | 2018-06-15 | 2018-10-02 | 昆明理工大学 | A kind of adaptive oil viscosity measuring device of strain-type and method |
| CN108613899B (en) * | 2018-06-15 | 2023-12-22 | 昆明理工大学 | Strain type self-adaptive oil viscosity measurement device and method |
| CN111005785A (en) * | 2019-12-31 | 2020-04-14 | 广西玉柴机器股份有限公司 | Integrated engine oil quality monitoring device |
| US11988117B2 (en) | 2020-09-02 | 2024-05-21 | Caterpillar Energy Solutions Gmbh | Engine lubrication oil consumption and condition monitoring |
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