CN112833955A - Method for establishing hydraulic oil quality monitoring model, monitoring method, device and system - Google Patents
Method for establishing hydraulic oil quality monitoring model, monitoring method, device and system Download PDFInfo
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Abstract
The invention provides a method for establishing a hydraulic oil quality monitoring model, a monitoring method, a device and a system, belonging to the technical field of hydraulic oil monitoring, wherein the hydraulic oil quality monitoring method comprises the steps of detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring working condition information and environment information of current equipment; performing data association on the quality evaluation index of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server; classifying the equipment according to the working condition information and the environmental information of the equipment, calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment, and establishing a hydraulic oil quality monitoring model. The method can judge the quality condition of the current hydraulic oil in real time, guarantees timeliness and effectiveness, and is simple in operation mode and more intelligent.
Description
Technical Field
The invention relates to the technical field of hydraulic oil monitoring, in particular to a method, a device and a system for monitoring the quality of hydraulic oil.
Background
The hydraulic system is widely applied to numerous fields such as engineering machinery and the like as a key technology of modern transmission and control. The hydraulic oil is used as a transmission medium of the hydraulic system, so that power can be transmitted, and the lubricating and rust-proof effects on moving parts can be achieved. Therefore, the reliability of the operation of the hydraulic system and the service life of the mechanical equipment are affected by the quality of the oil product of the hydraulic oil.
In the life cycle of the machine, normal hydraulic oil is often deteriorated and invalid due to the reasons of rainwater (emulsification), foreign matter invasion, oxidation, abrasive dust of an actuating mechanism and the like, so that the abrasion and corrosion of the machine are aggravated, and the accident risk of a hydraulic system is increased. At present, a method for replacing hydraulic oil regularly is used, namely oil replacement is carried out according to a determined period according to the structural characteristics, the operating conditions and the oil quality of a hydraulic system. However, the method is easy to cause the phenomenon that oil is maintained when oil is not changed and oil is not needed to be changed, thereby causing the waste of manpower and material resources and shortening the service life of equipment operation.
With the development of sensor technology, the on-line detection technology becomes one of the important means for monitoring the pollution of the hydraulic system, and is more and more accepted and accepted due to the real-time property and portability of the test. In the current engineering machinery industry, most of the engineering machinery industry detects mechanical hydraulic oil in various modes, and then professional technicians analyze and judge the mechanical equipment by combining working condition information and environment information according to detection data, but the methods have the following problems:
firstly, the current monitoring technology only realizes the real-time acquisition of hydraulic oil detection parameters, and cannot reflect the condition of the quality of hydraulic oil in real time.
Secondly, along with the continuous increase of engineering mechanical equipment and the continuous aggravation of the complexity of working condition environment, the timeliness and the effectiveness of monitoring the quality condition of the hydraulic oil are difficult to guarantee, and a large amount of professional technicians are needed for analysis, so that the waste of human resources is caused.
Disclosure of Invention
The invention solves the problems that the existing hydraulic oil monitoring technology only realizes the real-time acquisition of hydraulic oil detection parameters, can not reflect the quality condition of hydraulic oil in real time, is difficult to ensure the timeliness and effectiveness of the monitoring of the quality condition of the hydraulic oil, or needs a large amount of professional technicians to analyze, thereby causing at least one aspect of the waste of human resources.
In order to solve the above problems, the present invention provides a method for establishing a hydraulic oil quality monitoring model, comprising:
detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring working condition information and environment information of current equipment;
performing data association on the quality evaluation index of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server;
classifying the equipment according to the working condition information and the environmental information of the equipment, calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment, and establishing a hydraulic oil quality monitoring model.
Therefore, by establishing the hydraulic oil quality monitoring model, the quality condition of the current hydraulic oil can be judged in real time, the timeliness and the effectiveness of monitoring the quality condition of the hydraulic oil are guaranteed, the operation mode is simple, a large amount of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
Preferably, the calculating of the standard quality evaluation index of the hydraulic oil of each type of equipment includes: and respectively calculating the mean value and the standard deviation of the hydraulic oil quality evaluation indexes of the various equipment, and determining the range of the standard quality evaluation indexes of the hydraulic oil of the various equipment by using a normal distribution method.
Therefore, the normal distribution method is used for determining the range of the standard quality evaluation indexes of the hydraulic oil of various equipment, the data are convenient to analyze, a large number of technicians are not needed for analysis, and the method is more intelligent.
Preferably, the range of the standard quality evaluation indexes of the hydraulic oil of each type of equipment includes μ ± 2.58 σ, μ ± 1.96 σ or μ ± 1.64 σ, where μ is a mean value of the hydraulic oil quality evaluation indexes, and σ is a standard deviation of the hydraulic oil quality evaluation indexes.
Therefore, the range of the standard quality evaluation indexes of the various equipment hydraulic oil is limited.
Preferably, the quality evaluation index of the hydraulic oil comprises a dielectric constant or kinematic viscosity.
Therefore, the quality of the hydraulic oil can be better reflected by the dielectric constant or the kinematic viscosity.
Preferably, the operating condition information includes at least one of an operating time, a hydraulic oil temperature, a hydraulic oil pressure, an equipment operating condition, or an oil consumption.
Therefore, various working conditions influencing the quality of the hydraulic oil are acquired more comprehensively, so that the data of the subsequently established local database are more comprehensive and accurate, and the reference is stronger.
Preferably, the environmental information includes an external environmental temperature and/or humidity at which the device is currently located.
Therefore, the environmental information influencing the quality of the hydraulic oil is acquired more comprehensively, so that the data of the subsequently established local database is more comprehensive and accurate, and the referential performance is stronger.
Compared with the prior art, the method for establishing the hydraulic oil quality monitoring model has the advantages that the quality evaluation indexes of the hydraulic oil of the equipment under different working conditions and different environments in the same time period and the working condition information and the environment information of the current equipment are detected; performing data association on the quality evaluation index of the hydraulic oil of the equipment and the working condition information and the environment information of the current equipment, and storing the associated data to a server; the equipment is classified according to the working condition information and the environmental information of the equipment, the range of standard quality evaluation indexes of hydraulic oil of various equipment is calculated, a hydraulic oil quality monitoring model is established, the quality condition of the current hydraulic oil can be judged in real time, the timeliness and the effectiveness of monitoring the quality condition of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
In order to solve the above technical problem, the present invention further provides a hydraulic oil quality monitoring method, where the hydraulic oil quality monitoring model established based on the establishing method of the hydraulic oil quality monitoring model monitors the quality of the hydraulic oil, and the method includes: and judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
Compared with other advantages of the prior art, the hydraulic oil quality monitoring method and the hydraulic oil quality monitoring model establishing method have the same advantages, and are not described herein again.
Preferably, the judging the hydraulic oil quality of the current device according to the range of the standard quality evaluation index includes:
judging whether the detected quality evaluation indexes of the equipment hydraulic oil under different working conditions and different environments meet the range of the standard quality evaluation indexes,
if so, the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the hydraulic oil of the current equipment is abnormal hydraulic oil.
Therefore, a specific method for determining the quality of the hydraulic oil of the current equipment according to the range of the standard quality evaluation index is limited, and the operation is simpler and more intelligent.
In order to solve the above technical problem, the present invention further provides a hydraulic oil quality monitoring device, including:
a detection unit for detecting the position of the optical fiber,
the detection unit is used for detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period;
the detection unit is also used for detecting the working condition information and the environment information of the current equipment;
a data processing unit for processing the data received from the data processing unit,
the data processing unit is used for inputting the quality evaluation index of the equipment hydraulic oil, the working condition information and the environmental information of the current equipment into the hydraulic oil quality monitoring model established by the establishing method of the hydraulic oil quality monitoring model so as to obtain the range of the standard quality evaluation index of various equipment hydraulic oil;
a judging unit for judging whether the received signal is a signal,
and the judging unit is used for judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
The hydraulic oil quality monitoring device detects quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period and working condition information and environment information of current equipment through the detection unit; inputting the quality evaluation index of the hydraulic oil of the equipment and the working condition information and the environmental information of the current equipment into the established hydraulic oil quality monitoring model through a data processing unit, performing data association, and storing the associated data to a server; classifying the equipment according to the working condition information and the environment information of the equipment, and calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment through a calculating unit; and finally, judging the quality of the hydraulic oil of the current equipment according to the range of the standard quality evaluation index through a judging unit. The quality situation of the current hydraulic oil can be judged in real time, timeliness and effectiveness of monitoring the quality situation of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
In order to solve the technical problem, the invention further provides a hydraulic oil quality monitoring system, which comprises a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and runs to realize the hydraulic oil quality monitoring method.
Compared with other advantages of the prior art, the hydraulic oil quality monitoring system and the hydraulic oil quality monitoring method provided by the invention have the same advantages, and are not repeated herein.
Drawings
Fig. 1 is a flowchart of a hydraulic oil quality monitoring method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described in detail and clearly with reference to the accompanying drawings. In the description of embodiments of the present application, the description of the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that in the description of the embodiments of the present application, "/" indicates an OR meaning unless otherwise stated, for example, A/B may indicate A or B; "and/or" in the text is only an association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It should be noted that, the method for monitoring the quality of hydraulic oil in this embodiment specifically relates to a method for monitoring the quality of hydraulic oil of an engineering mechanical device, and accordingly, the device in this embodiment is an engineering mechanical device, and may be any one of an excavating machine, a shovel transportation machine, an engineering hoisting machine, an industrial vehicle, a compacting machine, a road surface machine, a piling machine, and a concrete machine.
As shown in fig. 1, an embodiment of the present invention provides a method for establishing a hydraulic oil quality monitoring model, including:
detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring working condition information and environment information of current equipment;
performing data association on the quality evaluation index of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server;
classifying the equipment according to the working condition information and the environmental information of the equipment, calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment, and establishing a hydraulic oil quality monitoring model.
Therefore, quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period and working condition information and environment information of the current equipment are detected; performing data association on the quality evaluation index of the hydraulic oil of the equipment and the working condition information and the environment information of the current equipment, and storing the associated data to a server; classifying the equipment according to the working condition information and the environmental information of the equipment, and calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment; and establishing a hydraulic oil quality monitoring model. The quality situation of the current hydraulic oil can be judged in real time, timeliness and effectiveness of monitoring the quality situation of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
In some preferred embodiments, the operating condition information includes at least one of an operating time, a hydraulic oil temperature, a hydraulic oil pressure, an equipment operating condition, or an oil consumption. When the hydraulic oil is used, if the temperature is higher, the viscosity of the hydraulic oil is reduced, the lubricity is reduced, the abrasion of an oil-dedicated pump and a hydraulic element is accelerated during working, and leakage is easily caused. If the temperature is lower, the viscosity of the hydraulic oil is increased, the movement flexibility of the hydraulic element is reduced, and in severe cases, the movement of the moving element cannot be performed, and the normal operation is influenced. The temperature control in the working of the general hydraulic oil is better within the range of 20-60 ℃. Therefore, various working conditions influencing the quality of the hydraulic oil are acquired more comprehensively, so that the data of the subsequently established local database are more comprehensive and accurate, and the reference is stronger.
In some preferred embodiments, the environmental information includes an ambient temperature and/or humidity at which the device is currently located. Therefore, the environmental information influencing the quality of the hydraulic oil is acquired more comprehensively, so that the data of the subsequently established local database is more comprehensive and accurate, and the referential performance is stronger.
In this embodiment, the database includes a local database and/or a cloud database, so that the hydraulic oil quality monitoring method in this embodiment can be used in a stand-alone or online situation, and the application range of the hydraulic oil quality monitoring method is widened.
In some preferred embodiments, the calculating the range of the standard quality evaluation index of each type of equipment hydraulic oil includes: and respectively calculating the mean value and the standard deviation of the hydraulic oil quality evaluation indexes of the various equipment, and determining the range of the standard quality evaluation indexes of the hydraulic oil of the various equipment by using a normal distribution method.
Therefore, the normal distribution method is used for determining the range of the standard quality evaluation indexes of the hydraulic oil of various equipment, so that the data can be conveniently analyzed without a large number of technicians, and the method is more intelligent.
In this embodiment, the mean values of the hydraulic oil quality evaluation indexes of various devices are recorded as μ 1 and μ 2, and the standard deviation of the hydraulic oil quality evaluation indexes of various devices is recorded as σ 1 and σ 1.
In some preferred embodiments, the range of the standard quality evaluation indexes of the various types of equipment hydraulic oil includes μ ± 2.58 σ, μ ± 1.96 σ or μ ± 1.64 σ, where μ is a mean value of the hydraulic oil quality evaluation indexes and σ is a standard deviation of the hydraulic oil quality evaluation indexes. Therefore, the range of the standard quality evaluation indexes of the various equipment hydraulic oil is limited.
In this embodiment, the quality evaluation index of the hydraulic oil includes a dielectric constant or a kinematic viscosity. Therefore, the quality of the hydraulic oil can be better reflected by the dielectric constant or the kinematic viscosity.
In some preferred embodiments, the method for evaluating the quality of hydraulic oil by using the dielectric constant is referred to as the dielectric constant method, and the dielectric constant method is to use the oil and the pollutants in the oil as dielectrics, when the lubricating oil is deteriorated, part of hydrocarbon molecules in the oil are oxidized to generate peroxides, acids and other chemical substances, so that the molecules are polarized. Along with the accumulation of oxidation products and thermal degradation products and the increase of external pollutants, the increase of polarized molecules in the oil can also be realized, so that the dielectric constant of the lubricating oil is changed; meanwhile, due to friction and abrasion, the dielectric constant of the lubricating oil is changed by abraded metal particles and other compounds with strong conductivity, and the dielectric constant of the lubricating oil depends on the components and the content of base oil additives and pollutants.
In some embodiments, a method for establishing a hydraulic oil quality monitoring model includes:
and step S1, detecting the dielectric constants of the equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring the working condition information and the environment information of the current equipment.
And step S2, performing data association on the dielectric constant of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server.
The server has the characteristics of high distribution, high virtualization and the like, network resources can be fully utilized, rapid supply and deployment are achieved, specific configuration of the server is not limited in the embodiment, and the server can be flexibly adjusted according to needs.
Step S3, classifying the equipment according to the working condition information and the environment information of the equipment, and respectively calculating the mean value and the standard deviation of the dielectric constant of the hydraulic oil of the various equipment to obtain the mean value of the dielectric constant of the hydraulic oil of the various equipment as mu 1 and mu 2, and the standard deviation of the dielectric constant of the hydraulic oil of the various equipment as sigma 1 and sigma 1.
And determining the standard dielectric constant range of the hydraulic oil of various equipment to be mu +/-2.58 sigma by using a normal distribution method and based on a '3 sigma' principle, and correlating the equipment type, the working condition information and the environmental information of the equipment and the standard dielectric constant of the hydraulic oil to establish a hydraulic oil quality monitoring model.
Wherein the normal step is a step with two parameters, mu and sigma2Is the mean of random variables that follow a normal distribution, σ2Is the variance of this random variable. Mu is a position parameter of normal distribution, describes the central trend position of normal distribution, and the probability law is that the probability of taking a value adjacent to mu is high, and the probability of taking a value farther from mu is lower. Σ describes the degree of dispersion of data distribution of normal distribution data, and the larger σ is, the more dispersed the data distribution is, and the smaller σ is, the more concentrated the data distribution is, which is also referred to as a shape parameter of normal distribution, and the larger σ is, the flatter the curve is, whereas the smaller σ is, the thinner the curve is.
The "3 σ" principle specifically means that, due to the "small probability event" and the basic idea of hypothesis testing, a "small probability event" generally refers to an event that has a probability of occurring less than 5%, which is considered to be almost impossible to occur in one trial. It can be seen that the probability that X falls outside (μ -3 σ, μ +3 σ) is less than three thousandths, and it is often considered that the corresponding time does not occur in practical problems, and basically, the interval (μ -3 σ, μ +3 σ) can be regarded as the actually possible value interval of the random variable X, which is called the "3 σ" principle of normal distribution.
In step S3, classifying the devices according to the operating condition information and the environmental information of the devices, and calculating the mean value and the standard deviation of the hydraulic oil dielectric constants of the various devices respectively, including classifying the devices under the same operating condition and environment into the same class, and calculating the mean value and the standard deviation of the hydraulic oil dielectric constants of the various devices under the same operating condition and environment, where the same operating condition and environment in this embodiment refer to the operating condition and environment in the same interval, and in some specific embodiments, the operating time is within 100 and 2000 hours, the same operating condition is determined, and the external environment temperature is between 10 ℃ and 15 ℃, the same environment is determined; the condition that the temperature of the hydraulic oil is between 30 and 40 ℃ can be determined as the same working condition, and the condition that the humidity of the external environment is between 30 and 40 percent can be determined as the same environment. Therefore, the information processing is faster through the interval classification method, and the classification and calculation are easier.
In the method for establishing the hydraulic oil quality monitoring model in this embodiment, the dielectric constants of the hydraulic oil of the equipment under different working conditions and different environments in the same time period and the working condition information and the environment information of the current equipment are detected; performing data association on the dielectric constant of the hydraulic oil of the equipment and the working condition information and the environment information of the current equipment, and storing the associated data to a server; the equipment is classified according to the working condition information and the environmental information of the equipment, the range of the standard dielectric constant of hydraulic oil of various equipment is calculated, a hydraulic oil quality monitoring model is established, the quality condition of the current hydraulic oil can be judged in real time, the timeliness and the effectiveness of monitoring the quality condition of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
In other embodiments, a method for establishing a hydraulic oil quality monitoring model includes:
step S1, detecting the kinematic viscosity of equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring the working condition information and the environment information of the current equipment;
step S2, performing data association on the kinematic viscosity of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server;
step S3, classifying the equipment according to the working condition information and the environment information of the equipment, namely classifying the equipment under the same working condition and environment into the same class, respectively calculating the mean value and the standard deviation of the kinematic viscosity of the hydraulic oil of various equipment, and recording the mean value of the kinematic viscosity of the hydraulic oil of various equipment as mu 1 and mu 2, and the standard deviation of the dielectric constant of the hydraulic oil of various equipment as sigma 1 and sigma 1.
Determining the standard kinematic viscosity range of the hydraulic oil of various equipment to be mu +/-1.96 sigma by using a normal distribution method and based on a '3 sigma' principle; and correlating the equipment type, the working condition information and the environment information of the equipment and the standard dielectric constant of the hydraulic oil to establish a hydraulic oil quality monitoring model.
In the method for monitoring the quality of the hydraulic oil, the kinematic viscosity of the hydraulic oil of the equipment under different working conditions and different environments and the working condition information and the environment information of the current equipment in the same time period are detected; after data association is carried out on the kinematic viscosity of the hydraulic oil of the equipment and the working condition information and the environment information of the current equipment, the associated data are stored in a server; classifying the equipment according to the working condition information and the environmental information of the equipment, calculating the range of the standard kinematic viscosity of the hydraulic oil of various equipment, and establishing a hydraulic oil quality monitoring model. The quality situation of the current hydraulic oil can be judged in real time, timeliness and effectiveness of monitoring the quality situation of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
The embodiment of the invention also provides a hydraulic oil quality monitoring method, which monitors the quality of the hydraulic oil based on the hydraulic oil quality monitoring model established by the establishing method of the hydraulic oil quality monitoring model, and comprises the following steps: and judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
In some preferred embodiments, determining the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index includes:
judging whether the detected quality evaluation indexes of the equipment hydraulic oil under different working conditions and different environments meet the range of the standard quality evaluation indexes,
if so, the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the hydraulic oil of the current equipment is abnormal hydraulic oil.
Therefore, a specific method for determining the quality of the hydraulic oil of the current equipment according to the range of the standard quality evaluation index is limited, and the operation is simpler and more intelligent.
In some preferred embodiments, the abnormal hydraulic oil comprises at least one of emulsified hydraulic oil, oxidation-modified hydraulic oil, hydraulic oil containing actuator abrasive dust, or hydraulic oil invaded by foreign matter. Therefore, according to different influence factors of the quality evaluation indexes of the hydraulic oil, the abnormal hydraulic oil is divided into multiple types, the influence factors of the quality of the hydraulic oil can be accurately distinguished, and mechanical equipment with the abnormal hydraulic oil is convenient to process so as to avoid the abnormal hydraulic oil from appearing again.
The main reason for emulsifying the hydraulic oil is that water is mixed in the hydraulic oil, when the water enters an oil pump station and contacts with the hydraulic oil, the water can be suspended in the hydraulic oil as large-cluster and large-cluster water bodies due to the mutual attraction acting force between water molecules, and is extruded by larger pressure in a hydraulic cavity through the pumping of a motor of the oil pump station, the water clusters are rapidly decomposed into small and small water molecules which are uniformly dispersed around the hydraulic oil clusters and are oxidized and deteriorated after a certain time, and the hydraulic oil can be whitened under the condition. The hydraulic system has four water inlet reasons, namely that water is inadvertently introduced in the storage and filling processes of hydraulic oil. Secondly, water is fed in the cleaning, oil changing and maintaining processes of the hydraulic system; thirdly, water pollution of a humid working environment; fourthly, the hydraulic system is poorly sealed to cause the entry of external moisture.
The oxidative deterioration of hydraulic oil mainly comprises the following reasons: high temperature, high pressure, pollution of hydraulic oil, water contained in oil, metal catalysis and air stirring.
The hydraulic oil containing the grinding dust of the actuating mechanism is generated by falling iron powder generated by abrasion of a certain moving part of a hydraulic element into the hydraulic oil.
The invasion of foreign matters into the hydraulic oil comprises that in the working process of a hydraulic system, foreign pollutants such as wind sand, solid particles, moisture, dust, moisture and the like invade the hydraulic system through various channels such as a piston rod and a pipeline joint of a hydraulic cylinder which stretch and retract back and forth, oil liquid injected into the system, splashed or condensed water drops, a backflow oil tank and the like, so that the hydraulic oil is polluted. Or contaminants introduced during refueling, oil change and maintenance, or foreign matter intrusion during rough handling during maintenance of the hydraulic system.
In some specific embodiments, determining the hydraulic oil quality of the current device according to the range of standard dielectric constants includes:
it is judged whether the dielectric constant of the device hydraulic oil detected in step S1 is between μ ± 2.58 σ,
if so, the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the hydraulic oil of the current equipment is abnormal hydraulic oil.
In other specific embodiments, determining the hydraulic oil quality of the current device according to the range of standard kinematic viscosities comprises:
it is judged whether the kinematic viscosity of the device hydraulic oil detected in step S1 is between μ ± 1.96 σ,
if so, the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the hydraulic oil of the current equipment is abnormal hydraulic oil.
In some preferred embodiments, determining the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index further includes: and when the hydraulic oil of the current equipment is judged to be abnormal hydraulic oil, a warning is given out. Therefore, the warning can be timely sent to the operator of the equipment with abnormal hydraulic oil, and the operator is reminded to timely perform targeted processing.
In this embodiment, the specific manner of sending the warning is not limited, and in some preferred embodiments, an audible and visual alarm may be provided on the device, and when it is determined that the hydraulic oil of the device is abnormal hydraulic oil, the audible and visual alarm acts to give an audible and visual warning to remind an operator of the device of paying attention; in other preferred embodiments, the information of the device may be associated with a mobile phone or other communication equipment of a device operator, and after it is determined that the device hydraulic oil is abnormal hydraulic oil, the information is sent to the mobile phone or other communication equipment of the device operator, so that even if the device operator is not beside the device, the information that the device hydraulic oil is abnormal hydraulic oil may be received in time, and further, the device hydraulic oil is correspondingly processed, for example, the hydraulic oil is replaced in time.
Therefore, in the hydraulic oil quality monitoring method of the embodiment, the dielectric constants of the hydraulic oil of the equipment under different working conditions and different environments in the same time period and the working condition information and the environment information of the current equipment are detected; performing data association on the dielectric constant of the hydraulic oil of the equipment and the working condition information and the environment information of the current equipment, and storing the associated data to a server; classifying the equipment according to the working condition information and the environment information of the equipment, and calculating the range of the standard dielectric constant of the hydraulic oil of various equipment; and finally, judging the quality of the hydraulic oil of the current equipment according to the range of the standard dielectric constant. The quality situation of the current hydraulic oil can be judged in real time, timeliness and effectiveness of monitoring the quality situation of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
The embodiment of the invention also provides a hydraulic oil quality monitoring device, which comprises:
a detection unit for detecting the position of the optical fiber,
the detection unit is used for detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period;
the detection unit is also used for detecting the working condition information and the environment information of the current equipment;
a data processing unit for processing the data received from the data processing unit,
the data processing unit is used for inputting the quality evaluation index of the equipment hydraulic oil, the working condition information and the environmental information of the current equipment into the established hydraulic oil quality monitoring model so as to obtain the range of the standard quality evaluation index of various equipment hydraulic oil;
a judging unit for judging whether the received signal is a signal,
and the judging unit is used for judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
In some preferred embodiments, the detection unit includes a dielectric constant tester for detecting a dielectric constant of the hydraulic oil, and the dielectric constant tester is installed in a hydraulic oil circuit of the construction machine.
In this embodiment, the dielectric constant tester is a latest generation general, multi-purpose, multi-range impedance tester, and a single chip computer is used as a control and measurement core of the tester.
In a specific example, the detection unit is configured to detect operating conditions of the equipment, dielectric constants of hydraulic oil of the equipment in different environments, operating condition information of the current equipment, and environment information in the same time period.
The data processing unit is used for inputting the dielectric constant of the hydraulic oil of the equipment, the working condition information and the environmental information of the current equipment into the established hydraulic oil quality monitoring model, performing data association and storing the associated data to a server; classifying the equipment according to the working condition information and the environment information of the equipment, classifying the equipment under the same working condition and environment into the same class so as to obtain the mean value and the standard deviation of the quality evaluation indexes of the hydraulic oil of various equipment, wherein the mean value of the dielectric constant of the hydraulic oil of various equipment is mu 1 and mu 2, the standard deviation of the dielectric constant of the hydraulic oil of various equipment is recorded as sigma 1 and sigma 1, and the standard deviation of the dielectric constant of the hydraulic oil of various equipment is determined to be mu +/-2.58 sigma by utilizing a normal distribution method and based on a 3 sigma principle.
The judging unit is used for determining the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index, and comprises the following steps:
the judgment unit judges whether the dielectric constant of the device hydraulic oil detected in step S1 is between μ ± 2.58 σ,
if yes, the judging unit judges that the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the judging unit judges that the hydraulic oil of the current equipment is abnormal hydraulic oil.
The hydraulic oil quality monitoring device of the embodiment detects quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period and working condition information and environment information of current equipment through the detection unit; inputting the quality evaluation index of the hydraulic oil of the equipment and the working condition information and the environmental information of the current equipment into the established hydraulic oil quality monitoring model through a data processing unit, performing data association, and storing the associated data to a server; classifying the equipment according to the working condition information and the environmental information of the equipment to obtain the range of standard quality evaluation indexes of hydraulic oil of various equipment; and finally, judging the quality of the hydraulic oil of the current equipment according to the range of the standard quality evaluation index through a judging unit. The quality situation of the current hydraulic oil can be judged in real time, timeliness and effectiveness of monitoring the quality situation of the hydraulic oil are guaranteed, the operation mode is simple, a large number of professional technicians are not needed for analysis, and the intelligent hydraulic oil quality monitoring system is more intelligent.
The embodiment also provides a hydraulic oil quality monitoring system, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and the computer program is read by the processor and runs to realize the hydraulic oil quality monitoring method.
Compared with the prior art, the hydraulic oil quality monitoring system and the hydraulic oil quality monitoring method have the same advantages, and are not described herein again.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), among others.
One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the above method embodiments. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A method for establishing a hydraulic oil quality monitoring model is characterized by comprising the following steps:
detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period, and acquiring working condition information and environment information of current equipment;
performing data association on the quality evaluation index of the equipment hydraulic oil and the working condition information and the environment information of the current equipment, and storing the associated data to a server;
classifying the equipment according to the working condition information and the environmental information of the equipment, calculating the range of standard quality evaluation indexes of hydraulic oil of various equipment, and establishing a hydraulic oil quality monitoring model.
2. The method for establishing the hydraulic oil quality monitoring model according to claim 1, wherein the calculating of the range of the standard quality evaluation index of the hydraulic oil of each type of equipment comprises: and respectively calculating the mean value and the standard deviation of the hydraulic oil quality evaluation indexes of the various equipment, and determining the range of the standard quality evaluation indexes of the hydraulic oil of the various equipment by using a normal distribution method.
3. The method for establishing the hydraulic oil quality monitoring model according to claim 2, wherein the range of the standard quality evaluation indexes of the various types of equipment hydraulic oil includes μ ± 2.58 σ, μ ± 1.96 σ or μ ± 1.64 σ, where μ is a mean value of the hydraulic oil quality evaluation indexes and σ is a standard deviation of the hydraulic oil quality evaluation indexes.
4. The method for establishing the hydraulic oil quality monitoring model according to claim 1, wherein the quality evaluation index of the hydraulic oil comprises a dielectric constant or a kinematic viscosity.
5. The method for establishing the hydraulic oil quality monitoring model according to claim 1, wherein the operating condition information includes at least one of operating time, hydraulic oil temperature, hydraulic oil pressure, equipment operating conditions or oil consumption.
6. The method for establishing the hydraulic oil quality monitoring model according to claim 1, wherein the environmental information includes an external environment temperature and/or humidity in which the current equipment is located.
7. A hydraulic oil quality monitoring method, wherein the monitoring of the quality of hydraulic oil based on the hydraulic oil quality monitoring model established by the establishing method of a hydraulic oil quality monitoring model according to any one of claims 1 to 6 includes: and judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
8. The hydraulic oil quality monitoring method according to claim 7, wherein judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index comprises:
judging whether the detected quality evaluation indexes of the equipment hydraulic oil under different working conditions and different environments meet the range of the standard quality evaluation indexes,
if so, the hydraulic oil of the current equipment is normal hydraulic oil;
if not, the hydraulic oil of the current equipment is abnormal hydraulic oil.
9. The utility model provides a hydraulic oil quality monitoring device which characterized in that includes:
a detection unit for detecting the position of the optical fiber,
the detection unit is used for detecting quality evaluation indexes of equipment hydraulic oil under different working conditions and different environments in the same time period;
the detection unit is also used for detecting the working condition information and the environment information of the current equipment;
a data processing unit for processing the data received from the data processing unit,
the data processing unit is used for inputting the quality evaluation index of the equipment hydraulic oil, the working condition information and the environmental information of the current equipment into the hydraulic oil quality monitoring model established by the establishing method of the hydraulic oil quality monitoring model according to any one of claims 1 to 6 so as to obtain the range of the standard quality evaluation index of various equipment hydraulic oil;
a judging unit for judging whether the received signal is a signal,
and the judging unit is used for judging the hydraulic oil quality of the current equipment according to the range of the standard quality evaluation index.
10. A hydraulic oil quality monitoring system comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read by the processor and executed to implement the hydraulic oil quality monitoring method according to claim 7 or 8.
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