Management device and management system for work machine
By designing oil replacement detection, candidate selection, acquisition and abnormality judgment functions in the operating machinery management device, the problem of low oil abnormality judgment accuracy in the prior art is solved, and higher judgment accuracy and accuracy of oil type judgment are achieved.
Patent Information
- Application Number
- CN202380060677.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-09-28
- Filing Date
- 2023-08-02
- Publication Date
- 2025-04-04
AI Technical Summary
In the prior art, when judging the abnormal oil used in the operating machinery drive device, the accuracy is low, especially after the oil is replaced tightly, due to individual differences and the influence of residual oil, the trait deviation may lead to a decrease in the judgment accuracy.
A management device is designed, including an oil replacement detection unit, an oil type candidate selection unit, an oil type acquisition unit and an oil abnormality determination unit. The oil trait changes are measured by the oil sensor, the oil replacement is detected, and multiple oil species candidates are selected based on the replaced trait, and the appropriate oil species command is output. Finally, the oil abnormality is judged by comparing the measured traits with the corresponding threshold.
The accuracy of judging oil abnormalities is improved, the accuracy of oil type judgment is ensured, and the reduction of judgment accuracy is avoided due to non-optimization of threshold values.
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Figure CN119768585A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a management device and a management system for a working machine. Background Art
[0002] The drive device mounted on the working machine includes, for example, an engine; a circulation system that circulates engine oil used for lubrication and cooling of the engine; a hydraulic pump driven by the engine; and a hydraulic actuator driven by hydraulic oil discharged from the hydraulic pump.
[0003] Patent Document 1 discloses a server computer that collects the properties of oil (specifically, the engine oil and the working oil) used by a driving device of a working machine and measured by an oil sensor of the working machine. The server computer determines oil abnormality by comparing the properties of the oil measured by the oil sensor with a predetermined threshold value.
[0004] Prior art literature
[0005] Patent Literature
[0006] Patent Document 1: Japanese Patent No. 6234359 Summary of the invention
[0007] The drive device of the working machine preferably uses pure oil (in other words, oil recommended by the manufacturer of the working machine), but sometimes uses impure oil (in other words, oil not recommended by the manufacturer of the working machine). As one of the methods for determining the type of oil used by the drive device of the working machine, a method using the measurement result of an oil sensor is considered. Specifically, the computer detects the replacement of the oil by the change of the property of the oil measured by the oil sensor. And the type of oil is determined based on the property measured by the oil sensor after the oil is replaced.
[0008] However, in the above method, even if the oil is replaced immediately, there is a possibility that the properties of the oil may deviate due to individual differences in the oil and the influence of residual oil, thereby reducing the accuracy of determining the type of oil. Therefore, the threshold for determining oil abnormality may not be optimized, and the accuracy of determining oil abnormality may be reduced.
[0009] An object of the present invention is to provide a management device and a management system for a working machine that can improve the accuracy of determining an oil abnormality.
[0010] In order to achieve the above-mentioned purpose, the present invention is representative of a management device for managing oil used by a drive device of a working machine, wherein the device comprises: an oil replacement detection unit, which obtains a measurement value of a property of the target oil from an oil sensor mounted on the working machine, and detects the replacement of the target oil based on a change in the property of the target oil; an oil type candidate selection unit, which selects a plurality of oil type candidates of the replaced target oil based on the property measured by the oil sensor after detecting the replacement of the target oil; an oil type acquisition unit, which outputs an instruction capable of selecting the type of the target oil from a plurality of the oil type candidates, accepts an input for selecting the type of the target oil, and thereby obtains the type of the target oil; and an oil abnormality judgment unit, which compares the property measured by the oil sensor with a threshold value corresponding to the type of the target oil, and thereby judges the abnormality of the target oil.
[0011] Effects of the Invention
[0012] According to the present invention, it is possible to improve the accuracy of determining whether oil is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a block diagram showing the configuration of a management system according to one embodiment of the present invention.
[0014] Figure 2 It is a side view showing the structure of a hydraulic excavator according to one embodiment of the present invention.
[0015] Figure 3 This is a schematic diagram showing the configuration of a drive device for a hydraulic excavator according to an embodiment of the present invention.
[0016] Figure 4 This is a flowchart showing the process related to the acquisition of oil types by the management controller of the management server according to one embodiment of the present invention.
[0017] Figure 5 This is a diagram for explaining detection of oil replacement by a management controller of a management server according to one embodiment of the present invention.
[0018] Figure 6 This is a diagram showing a screen of a monitor of a hydraulic excavator or a screen of a terminal for an operator according to an embodiment of the present invention.
[0019] Figure 7 This is a diagram for explaining determination of oil abnormality by a management controller of a management server according to one embodiment of the present invention. DETAILED DESCRIPTION
[0020] One embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, a hydraulic excavator is taken as an example as a working machine.
[0021] Figure 1 It is a block diagram showing the configuration of the management system in this embodiment. Figure 2 It is a side view showing the structure of the hydraulic excavator in this embodiment. Figure 3 2 is a schematic diagram showing the structure of the drive device of the hydraulic excavator in this embodiment. Figure 3 Among the structures related to the driving of multiple hydraulic actuators (specifically, multiple control valves, etc.), for convenience, only the structures related to the driving of the boom hydraulic cylinder are shown, but the structures related to the driving of other hydraulic actuators are also the same.
[0022] The management system of this embodiment includes a hydraulic excavator 1, a terminal 2 held by an operator who performs maintenance on the hydraulic excavator 1, and a management server 3 held by the manufacturer of the hydraulic excavator 1. The vehicle body controller 4 mounted on the hydraulic excavator 1, the operator's terminal 2, and the management server 3 can communicate with each other via a communication network 5.
[0023] The hydraulic excavator 1 includes a travelable lower traveling body 6, an upper rotating body 7 rotatably provided on the upper side of the lower traveling body 6, and a working device 8 connected to the upper rotating body 7. The lower traveling body 6 travels by the rotation of a travel motor (not shown), and the upper rotating body 7 rotates by the rotation of a rotating motor (not shown).
[0024] The working device 8 includes a boom 9 rotatably connected to the upper rotating body 7, an arm 10 rotatably connected to the front end of the boom 9, and a bucket 11 rotatably connected to the front end of the arm 10. The boom 9 is rotated by the extension and contraction of the boom hydraulic cylinder 12, the arm 10 is rotated by the extension and contraction of the arm hydraulic cylinder 13, and the bucket 11 is rotated by the extension and contraction of the bucket hydraulic cylinder 14.
[0025] The drive device 15 of the hydraulic excavator 1 includes: an engine 16; a circulation system 17 that circulates engine oil used for lubrication and cooling of the engine 16; a hydraulic pump 18 driven by the engine 16; a plurality of hydraulic actuators (specifically, the above-mentioned travel motor, rotation motor, boom hydraulic cylinder 12, dipper arm hydraulic cylinder 13, and bucket hydraulic cylinder 14) driven by the working oil discharged from the hydraulic pump 18; a plurality of control valves 19 that respectively control the flow of hydraulic oil from the hydraulic pump 18 to the plurality of hydraulic actuators; and a plurality of operating devices (not shown) for operating the plurality of control valves 19.
[0026] In this embodiment, the oil sensor 20A is provided in the oil path between the boom cylinder 12 and the control valve 19, for example, to measure the properties of the working oil (for example, viscosity, density, dielectric constant, chromaticity, and particle concentration). The oil sensor 20B is provided in the circulation system 17 to measure the properties of the engine oil.
[0027] Although not shown, the body controller 4 of the hydraulic excavator 1 includes a processor that executes processing according to a program, a memory that stores programs and data, etc. The body controller 4 temporarily stores the properties of the working oil measured by the oil sensor 20A and the properties of the engine oil measured by the oil sensor 20B in the memory, and transmits them to the management server 3 at a predetermined period.
[0028] The monitor 21 of the hydraulic excavator 1 is disposed in the cab of the hydraulic excavator 1 and is connected to the vehicle body controller 4 via wiring. Although not shown, the monitor 21 includes a processor that executes processing according to a program, a memory that stores programs and data, and an interface that enables input and display.
[0029] Although not shown in the figure, the operator terminal 2 includes a processor that executes processing according to a program, a memory that stores programs and data, an interface that enables input and display, and the like.
[0030] The management server 3 of this embodiment targets the oil (specifically, the above-mentioned working oil and engine oil) used by the driving device 15 of the hydraulic excavator 1, has a function of collecting the properties of the oil measured by the oil sensors 20A and 20B of the hydraulic excavator 1, and is equivalent to the management device described in the technical solution. Hereinafter, the oil to be measured by the oil sensor 20A or 20B (that is, the oil to be managed) is sometimes referred to as the target oil. In this embodiment, the working oil or the engine oil is the target oil.
[0031] The management server 3 includes a management controller 22 and a storage device 23. Although not shown in the figure, the management controller 22 includes a processor that executes processing according to a program and a storage device that stores programs and data. The storage device of the management controller 22 temporarily stores the time series data of the properties of the target oil obtained from the vehicle body controller 4. The processor of the management controller 22 processes the data stored in the storage device and stores the data generated by the processing in the storage device 23.
[0032] The storage device 23 is, for example, a hard disk for constructing a database, storing data of the hydraulic excavator 1 obtained from the vehicle body controller 4, data obtained from the operator's terminal 2, etc., data generated by the management controller 22, and pre-acquired data on multiple types of oil (in detail, initial properties of each type of oil, and threshold values of properties pre-set for each type of oil for abnormality judgment, etc.).
[0033] The management controller 22 has, as functional components, an oil replacement detection unit 24, an oil type candidate selection unit 25, an oil type acquisition unit 26, and an oil abnormality determination unit 27. The processing contents of the management controller 22 will be described. Figure 4This is a flowchart showing the process related to the acquisition of the type of target oil among the processes of the management controller 22 according to the present embodiment.
[0034] The oil replacement detection unit 24 of the management controller 22 detects replacement of the target oil using the time series data of the target oil acquired from the vehicle body controller 4 ( Figure 4 Step S1).
[0035] Specifically, Figure 5 As shown, in the properties of the target oil (although Figure 5 The density is used as an example, but it can also be other properties) n -A n－1 ) exceeds a predetermined value (specifically, a value preset in consideration of the degradation of the target oil and the measurement error of the oil sensor), it is determined that the oil has been n－1 To time T n The period of is the oil replacement period (that is, the target oil is replaced during this period). In addition, a replacement history of the target oil for the hydraulic excavator 1 (for example, the oil replacement date) is created and stored in the storage device 23.
[0036] The oil type candidate selection unit 25 of the management controller 22 extracts the property of the target oil immediately after replacement from the time series data of the property of the target oil acquired from the vehicle body controller 4 ( Figure 5 A in the middle n ). In addition, based on the properties of the target oil immediately after replacement and the data of multiple types of oil stored in the storage device 23, multiple oil type candidates ( Figure 4 Step S2). Specifically, multiple first oil type candidates are selected that have properties within a first range (e.g., 80% to 120%) set in advance relative to the properties of the target oil immediately after replacement. In addition, at least one second oil type candidate is selected that has properties outside the first range and within a second range (e.g., 70% to 130%) set in advance in a manner larger than the first range relative to the properties of the target oil immediately after replacement.
[0037] The oil type acquisition unit 26 of the management controller 22 outputs an instruction to select the type of target oil from the above-mentioned plurality of oil type candidates to the monitor 21 via the body controller 4 of the hydraulic excavator 1, or to the operator's terminal 2 ( Figure 4 Step S3).
[0038] Monitor 21 or terminal 2 displays a plurality of oil type candidates according to the above instructions. Figure 6As shown, in the screen 28A of the first stage, "nameplate A", "nameplate B", "nameplate C" and "nameplate D" as a plurality of first oil type candidates can be displayed together with "other nameplates" and "no oil replacement" in a selectable manner. "Nameplate A", "nameplate B", "nameplate C" and "nameplate D" can be displayed in an order of properties close to the properties of the target oil immediately after replacement, for example. In the case where "other nameplates" of the screen 28A are selected through the operator operation monitor 21 of the hydraulic excavator 1 or the operator operation terminal 2, the screen 28B of the second stage is transferred to, and "nameplate E" and "nameplate F" as second oil type candidates are displayed together with "other nameplates" in a selectable manner. "Nameplate E" and "nameplate F" can be displayed in an order of properties close to the properties of the target oil immediately after replacement, for example. In the case where "other nameplates" of the screen 28B are selected, a newly added nameplate can be input.
[0039] When any one of "nameplate A", "nameplate B", "nameplate C", "nameplate D", "nameplate E" and "nameplate F" is selected as the type of the target oil, the monitor 21 or the terminal 2 outputs the type of the target oil to the management controller 22 of the management server 3. As a result, the oil type acquisition unit 26 of the management controller 22 acquires the type of the target oil and stores it in the storage device 23 while associating it with the replacement history of the target oil.
[0040] In this case, the oil abnormality determination unit 27 of the management controller 22 reads the threshold value of the property corresponding to the type of the target oil from the storage device 23 and sets it ( Figure 4 Then, the abnormality of the target oil is determined by comparing the time series data of the property of the target oil acquired from the vehicle body controller 4 of the hydraulic excavator 1 with the threshold value.
[0041] To explain in detail, when the target oil is brand A, the oil abnormality determination unit 27 of the management controller 22 reads and sets the corresponding upper threshold SAh and lower threshold Sal of viscosity, upper threshold SBh of density, and upper threshold SCh of dielectric constant from the storage device 23. Figure 7 As shown in FIG. 1 , when the viscosity of the target oil is higher than the upper threshold value SAh, it is determined to be abnormal. Alternatively, when the viscosity of the target oil is lower than the lower threshold value Sal, it is determined to be abnormal. In addition, when the density of the target oil is higher than the upper threshold value SBh, it is determined to be abnormal. Figure 7 As shown, when the dielectric constant of the target oil is higher than the upper threshold value SCh, it is determined to be abnormal.
[0042] When the monitor 21 or the terminal 2 inputs the newly added nameplate as the type of the target oil, it outputs the type of the target oil to the management server 3. Thus, the oil type acquisition unit 26 of the management controller 22 acquires the type of the target oil and stores it in the storage device 23 while associating it with the replacement history of the target oil.
[0043] In this case, the oil abnormality determination unit 27 of the management controller 22 selects a substitute oil type having properties closest to the properties of the target oil immediately after replacement, reads the threshold value of the properties corresponding to the substitute oil type from the storage device 23 and sets it ( Figure 4 Then, the time series data of the property of the target oil acquired from the vehicle body controller 4 of the hydraulic excavator 1 is compared with a threshold value, thereby determining whether the target oil is abnormal.
[0044] When the monitor 21 or the terminal 2 selects "no oil change", the monitor 21 or the terminal 2 outputs the information to the management server 3. As a result, the management controller 22 of the management server 3 does not obtain the type of the target oil, and corrects the replacement history of the target oil stored in the storage device 23. In addition, the management controller 22 of the management server 3 determines that the oil change detection is abnormal based on the above information, and outputs the notification to the terminal 2 ( Figure 4 Step S6). This allows the operator to investigate the cause of the abnormality in the oil change detection.
[0045] As described above, in this embodiment, the oil type candidate selection unit 25 of the management controller 22 selects a plurality of oil type candidates of the target oil after replacement based on the properties measured by the oil sensor after detecting the replacement of the target oil. The oil type acquisition unit 26 of the management controller 22 outputs an instruction that can select the type of the target oil from a plurality of oil type candidates, accepts the selection input of the type of the target oil, and thereby acquires the type of the target oil. The oil abnormality judgment unit 27 of the management controller 22 compares the properties measured by the oil sensor with the threshold value corresponding to the type of the target oil, thereby judging the abnormality of the target oil. Therefore, optimizing the threshold value used to judge the abnormality of the oil can improve the accuracy of judging the abnormality of the oil.
[0046] In addition, although not particularly described in the above embodiment, the hydraulic excavator 1 may also include a temperature sensor (not shown) for measuring the temperature of the target oil. The body controller 4 of the hydraulic excavator 1 may also temporarily store the temperature of the target oil measured by the temperature sensor in a storage device and send it to the management server 3 at a predetermined period. The management controller 22 of the management server 3 may also correct the property of the target oil according to the temperature of the target oil. In other words, the property of the target oil corresponding to the reference temperature of the target oil may also be calculated.
[0047] In addition, although not specifically described in the above embodiment, the management controller 22 of the management server 3 may also construct a function for correcting the measurement value of the oil sensor based on the difference between the property measured by the oil sensor and the property stored in the storage device 23, and use the function to correct the measurement value of the oil sensor.
[0048] In addition, in the above-mentioned embodiment, the case where the oil type candidate selection unit 25 of the management controller 22 selects at least one second oil type candidate having properties outside the first range and within the second range pre-set in a manner larger than the first range relative to the properties of the target oil immediately after replacement is described as an example, but the invention is not limited thereto. The oil type candidate selection unit 25 of the management controller 22 may also be, for example, to select at least one second oil type candidate that is different from the plurality of first oil type candidates but has a usage history. In this case, the monitor 21 or the terminal 2 may also display the second oil type candidates, for example, in the order of the most recent use period or the order of the most frequent use.
[0049] In addition, in the above-mentioned embodiment, the management controller 22 of the management server 3 is described as an example in which the management controller 22 includes the oil replacement detection unit 24, the oil type candidate selection unit 25, and the oil type acquisition unit 26, but the present invention is not limited thereto. For example, the body controller 4 of the hydraulic excavator 1 may include the oil replacement detection unit 24, and the management controller 22 of the management server 3 may include the oil type candidate selection unit 25 and the oil type acquisition unit 26. Alternatively, for example, the body controller 4 of the hydraulic excavator 1 may include the oil replacement detection unit 24, the oil type candidate selection unit 25, and the oil type acquisition unit 26.
[0050] In addition, the above description is made by taking the case where the working machine is a hydraulic excavator as an example, but it is not limited to this. For example, it can also be a dump truck, a wheel loader, a bulldozer, a forklift or a crane. In addition, the description is made by taking the case where the oil used by the driving device of the working machine is both working oil and engine oil as an example, but it is not limited to this. It can also be one of the working oil and the engine oil, or it can be other oils. In other words, the oil that becomes the management object (target oil) can be various oils. In this case, it is sufficient to obtain various information from the working machine equipped with an oil sensor that can measure the properties of the oil that becomes the object.
[0051] Description of Reference Numerals
[0052] 1Hydraulic excavator (working machinery)
[0053] 2 Terminal
[0054] 3. Management Server (Management Device)
[0055] 15. Drive device
[0056] 20A, 20B oil sensor
[0057] 21 Monitor
[0058] 24 Oil replacement detection unit
[0059] 25 Oil Type Candidate Selection Department
[0060] 26 Oil Acquisition Department
[0061] 27. Oil abnormality judgment unit.
Claims
1. A management device for a working machine, which manages oil used by a driving device of the working machine, characterized in that: The management device comprises: an oil replacement detection unit that acquires a measured value of a property of a target oil from an oil sensor mounted on the working machine and detects replacement of the target oil based on a change in the property of the target oil; an oil type candidate selection unit that selects a plurality of oil type candidates of the target oil after the replacement based on the property measured by the oil sensor after the replacement of the target oil is detected; an oil type acquisition unit that outputs an instruction to select the type of the target oil from a plurality of the oil type candidates, and receives an input for selecting the type of the target oil, thereby acquiring the type of the target oil; and The oil abnormality determination unit compares the property measured by the oil sensor with a threshold value corresponding to the type of the target oil to thereby determine abnormality of the target oil.
2. The management device for working machinery according to claim 1, characterized in that: The oil type candidate selection unit is configured as follows: selecting a plurality of first oil type candidates having properties within a first range set in advance relative to the properties measured by the oil sensor after the target oil is replaced, selecting at least one second oil type candidate having a property that is outside the first range and within a second range that is preset to be larger than the first range with respect to the property measured by the oil sensor after the target oil is replaced, The oil type acquisition unit displays a plurality of first oil type candidates as a first stage and is capable of selecting the type of the target oil from the plurality of first oil type candidates, and displays at least one second oil type candidate as a second stage and outputs an instruction capable of selecting the type of the target oil from at least one second oil type candidate.
3. The management device for working machinery according to claim 1, characterized in that: The oil type candidate selection unit is configured as follows: selecting a plurality of first oil type candidates having properties within a predetermined range relative to the properties measured by the oil sensor after the target oil is replaced, and selecting at least one second oil type candidate that is different from the plurality of first oil type candidates but has a usage history, The oil type acquisition unit displays a plurality of first oil type candidates as a first stage, and is capable of selecting the type of the target oil from the plurality of first oil type candidates. As a second stage, it displays at least one second oil type candidate, and outputs an instruction capable of selecting the type of the target oil from at least one second oil type candidate.
4. The management device for working machinery according to claim 1, characterized in that: The oil abnormality determination unit is configured as follows: When the type of the target oil acquired by the oil type acquisition unit is different from the plurality of oil type candidates, a replacement oil type having properties closest to the properties measured by the oil sensor after the target oil is replaced is selected; The property measured by the oil sensor is compared with a threshold value corresponding to the substitute oil type, thereby determining abnormality of the target oil.
5. A management system for an operating machine, comprising: A working machine having a drive device and an oil sensor for measuring a property of oil used by the drive device; and A management device capable of communicating with the working machine and managing the oil used by the drive device, wherein the management system is characterized in that: The management device comprises: an oil replacement detection unit that acquires a measured value of a property of a target oil from an oil sensor mounted on the working machine and detects replacement of the target oil based on a change in the property of the target oil; an oil type candidate selection unit that selects a plurality of oil type candidates of the target oil after the replacement based on the property measured by the oil sensor after the replacement of the target oil is detected; an oil type acquisition unit that outputs an instruction to select the type of the target oil from a plurality of the oil type candidates, and receives an input for selecting the type of the target oil, thereby acquiring the type of the target oil; and The oil abnormality determination unit compares the property measured by the oil sensor with a threshold value corresponding to the type of the target oil to thereby determine abnormality of the target oil.
6. The management system for working machines according to claim 5, characterized in that: The working machine has a monitor. The oil type acquisition unit of the management device outputs the command to the monitor of the working machine.
7. The management system for working machines according to claim 5, characterized in that: A terminal is held by an operator who performs maintenance on the working machine and is capable of communicating with the management device. The oil type acquisition unit of the management device outputs the instruction to the terminal.
Citation Information
Patent Citations
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JP1987034359A