CN211346941U - Excavator and automatic bucket counting system thereof - Google Patents
Excavator and automatic bucket counting system thereof Download PDFInfo
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- CN211346941U CN211346941U CN202020449346.0U CN202020449346U CN211346941U CN 211346941 U CN211346941 U CN 211346941U CN 202020449346 U CN202020449346 U CN 202020449346U CN 211346941 U CN211346941 U CN 211346941U
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Abstract
The utility model provides an excavator and an automatic bucket counting system thereof, which relate to the technical field of excavators and comprise a data acquisition module, a data processing module and a counting module; the data acquisition module comprises an electric signal acquisition module and a pressure sensor; the electric signal acquisition module and the pressure sensor are respectively connected with the data processing module, and the data processing module is connected with the counting module; the electric signal acquisition module is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle and electric signals of getting-on rotation; the pressure sensor is used for acquiring the pressure value of the bucket oil cylinder, when the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the counting module automatically increases 1 for bucket number statistics of the excavator, the system is simple in structure and relatively low in cost, invalid bucket numbers can be eliminated, and accuracy and reliability of statistical data are further guaranteed.
Description
Technical Field
The utility model belongs to the technical field of the excavator technique and specifically relates to an excavator and automatic number fill system thereof is related to.
Background
As an excavator company, a newly developed excavator needs to perform various performance tests, wherein an important index is an oil consumption efficiency test, and the key point is to count the excavating frequency of a bucket in the oil consumption efficiency test process.
The conventional method for counting the number of operating buckets of the excavator is to assemble displacement sensors on a movable arm, a bucket rod and a bucket cylinder of the excavator, detect the posture of a whole machine working device through the three displacement sensors, and further judge whether the whole machine is in a discharging state or not, so that the bucket number is counted.
However, the method for counting the bucket number of the excavator has the following defects: the cost is increased by installing sensors at the movable arm, the bucket rod and the bucket; meanwhile, whether the excavator is in a loading or no-load state cannot be judged, and the information of the counted effective bucket number is inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an excavator and an automatic bucket counting method and a system thereof, which relieve the problem that the cost is increased by installing sensors at a movable arm, a bucket rod and a bucket in the existing method for counting the number of buckets in the operation of the excavator; meanwhile, the technical problem that the information of the counted effective bucket number is inaccurate because whether the excavator is in a loading or no-load state cannot be judged.
The utility model provides an automatic bucket counting system of an excavator, which comprises a data acquisition module, a data processing module and a counting module;
the data acquisition module comprises an electric signal acquisition module and a pressure sensor; the electric signal acquisition module and the pressure sensor are respectively connected with the data processing module, and the data processing module is connected with the counting module;
the electric signal acquisition module is used for acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle, and when the electric signals sequentially change from zero to a positive value or a negative value, the excavator is judged to finish material excavating action;
the electric signal acquisition module is used for acquiring an electric signal of the upper turning of the electric control handle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the excavator is judged to finish the material transfer action;
the electric signal acquisition module is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle, and when the electric signals sequentially change from a positive value or a negative value to zero, the excavator is judged to finish the material unloading action;
the pressure sensor is used for acquiring a pressure value of the bucket oil cylinder, and when the pressure value is greater than or equal to a preset pressure value, the number of buckets of the excavator is judged to be effective;
after the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator of the counting module is automatically increased by 1.
Further, the data acquisition module comprises a rotation angle sensor; the corner sensor is connected with the data processing module;
the corner sensor is used for collecting the turning angle of getting on the vehicle, and when the turning angle is larger than or equal to a preset angle, the excavator is judged to finish the material transfer action.
Further, the electric signal is a voltage signal or a current signal.
Further, the automatic bucket counting system of the excavator comprises a display; the display is connected with the counting module and used for displaying the bucket number of the excavator.
Furthermore, the pressure sensor is arranged inside the bucket oil cylinder, and the pressure sensor is connected with the data processing module in a wireless communication mode.
Further, the automatic bucket counting system of the excavator comprises an input module, wherein the input module is connected with the data processing module and used for setting the preset pressure value.
The utility model provides an excavator, include the automatic number of excavator fill system.
The utility model provides an automatic bucket counting system of an excavator, which comprises a data acquisition module, a data processing module and a counting module; the data acquisition module comprises an electric signal acquisition module and a pressure sensor; the electric signal acquisition module and the pressure sensor are respectively connected with the data processing module, and the data processing module is connected with the counting module; the electric signal acquisition module is used for acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle, and when the electric signals sequentially change from zero to a positive value or a negative value, the excavator is judged to finish material excavating action; the electric signal acquisition module is used for acquiring an electric signal of the upper turning of the electric control handle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the excavator is judged to finish the material transfer action; the electric signal acquisition module is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle, and when the electric signals sequentially change from a positive value or a negative value to zero, the excavator is judged to finish the material unloading action; the pressure sensor is used for acquiring a pressure value of the bucket oil cylinder, and when the pressure value is greater than or equal to a preset pressure value, the number of buckets of the excavator is judged to be effective; after the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator of the counting module is automatically increased by 1. The electric signal acquisition module is used for acquiring the electric signals of the movable arm, the bucket rod, the bucket and the loading rotation to judge the material excavating action, the material transferring action and the unloading action of the excavator, when the pressure value of the bucket oil cylinder acquired by the pressure sensor is greater than or equal to the preset value, the effective bucket number of the excavator is judged, and therefore the automatic counting of the bucket number of the excavator is realized.
The utility model provides an excavator, include the automatic number of excavator fill system, because of the excavator include the automatic number of foretell excavator fill system, so possess on this excavator the automatic number of excavator fill system's advantage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of an automatic bucket counting system of an excavator according to an embodiment of the present invention;
fig. 2 is a flowchart of an automatic bucket counting method for an excavator according to an embodiment of the present invention.
Icon: 100-a data acquisition module; 110-an electrical signal acquisition module; 120-a pressure sensor; 130-rotation angle sensor; 200-a data processing module; 300-a counting module; 400-a display; 500-input module.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the present invention provides an automatic bucket counting system for excavator, which comprises a data collecting module 100, a data processing module 200 and a counting module 300.
The data acquisition module 100 comprises an electrical signal acquisition module 110 and a pressure sensor 120; the electric signal acquisition module 110 and the pressure sensor 120 are respectively connected with the data processing module 200, and the data processing module 200 is connected with the counting module 300.
The electric signal acquisition module 110 is used for acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle, and when the electric signals sequentially change from zero to a positive value or a negative value, the excavator is judged to finish the material excavating action.
The electric signal acquisition module 110 is used for acquiring an electric signal of the electric control handle during turning on the vehicle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the excavator is judged to complete the material transfer action.
The electric signal acquisition module 110 is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle, and when the electric signals sequentially change from positive values or negative values to zero, the excavator is judged to complete material unloading.
The pressure sensor 120 is configured to collect a pressure value of the bucket cylinder, and determine that the bucket number of the excavator is valid when the pressure value is greater than or equal to a preset pressure value.
After the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator of the counting module 300 is automatically increased by 1.
The electric signal acquisition module 110 is used for acquiring the change of electric signals of the movable arm, the bucket rod, the bucket and the upper turning to judge the material excavating action, the material transferring action and the unloading action of the excavator, when the pressure value of the bucket oil cylinder acquired by the pressure sensor 120 is greater than or equal to the preset pressure value, the effective bucket number of the excavator is judged, so that the automatic counting of the bucket number of the excavator is realized, the system is simple in structure and relatively low in cost, the invalid bucket number can be eliminated by comparing the acquired pressure value with the preset pressure value, and the accuracy and reliability of the counting data are further ensured.
The electrical signal collection module 110 may be a module capable of collecting electrical signals in the electric control handle in the prior art.
Further, the data acquisition module 100 includes a rotation angle sensor 130; the rotation angle sensor 130 is connected to the data processing module 200.
The corner sensor 130 is used for collecting the turning angle of getting on the vehicle, and when the turning angle is larger than or equal to a preset angle, the excavator is judged to finish the material transfer action.
Specifically, the rotation angle sensor 130 is disposed on the upper vehicle, and is capable of collecting a rotation angle of the upper vehicle, and when the rotation angle is greater than or equal to a preset angle, it is determined that the excavator completes a material transfer operation.
It should be noted that whether the excavator completes the material rotation operation or not can be judged through the electric signal acquisition module 110 and the rotation angle sensor 130. The electric signal acquisition module 110 is used for acquiring the electric signal of the upper turning of the electric control handle, when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the next judgment is carried out, namely, the rotation angle sensor 130 acquires the rotation angle of the upper turning, and when the rotation angle is larger than or equal to a preset angle, the excavator is judged to complete the material transfer action. The rotation angle sensor 130 and the electric signal acquisition module 110 are used for respectively acquiring the rotation angle of the upper vehicle and the change of the electric signal to judge that the excavator completes the material transfer action, and the rotation angle sensor 130 and the electric signal acquisition module are combined to further improve the accuracy of judging that the excavator completes the material transfer action.
Further, the electrical signal is a voltage signal or a current signal.
Further, the excavator automatic bucket counting system includes a display 400; the display 400 is connected to the counting module 300 and is used for displaying the bucket number of the excavator.
Specifically, the display 400 can display the bucket number of the excavator counted by the counting module 300, so that the detection personnel can read the bucket number conveniently.
It should be noted that, the display 400 may also be a touch display screen, the touch display screen is connected to the data processing module 200, and the staff may set a preset pressure value and a preset angle on the touch display screen, which is simple and convenient.
Further, the pressure sensor 120 is disposed inside the bucket cylinder, and the pressure sensor 120 is connected to the data processing module 200 in a wireless communication manner.
Specifically, in this embodiment, the pressure sensor 120 is disposed inside the bucket cylinder, and is capable of detecting an actual pressure value inside the bucket cylinder, the pressure sensor 120 is capable of transmitting the acquired pressure value to the data processing module 200 in a wireless transmission manner, the data processing module 200 is capable of receiving the pressure value acquired by the pressure sensor 120, comparing the wind of the data processing module 200 with a preset pressure value, and when the acquired pressure value is greater than or equal to the preset pressure value, determining that the bucket number of the excavator is valid; and when the collected pressure value is smaller than the preset pressure value, judging that the bucket number of the excavator is invalid.
Further, the automatic bucket counting system of the excavator comprises an input module 500, wherein the input module 500 is connected with the data processing module 200 and is used for setting the preset pressure value.
Specifically, the input module 500 is connected to the data processing module 200, and can set a preset pressure value and a preset angle. The automatic bucket counting system of the excavator comprises a keyboard, wherein the keyboard is connected with the input module 500, and a preset pressure value is set through the keyboard.
It should be noted that the excavator automatic bucket counting system includes the display 400, and the display 400 may be a touchable display screen, and the touchable display screen is connected with the input module 500, so as to also achieve the purpose of inputting the preset pressure value.
As shown in fig. 2, the utility model provides an automatic bucket counting method for an excavator, which depends on the automatic bucket counting method for an excavator, specifically comprises the following steps:
acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle by using an electric signal acquisition module 110, judging that the excavator finishes a material excavating action when the electric signals sequentially change from zero to a positive value or a negative value, and judging the next material transferring action step; the method comprises the steps of collecting an electric signal of the electric control handle for turning on the vehicle, judging that the excavator completes material transfer action when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, and judging the next unloading action.
In general, a bucket excavates a material at a material excavation site, then a loading vehicle rotates by a certain angle and stops, the bucket unloads the material at a material unloading site, the loading vehicle of the excavator is stationary at the material excavation site, rotates, and then is stationary again at the material unloading site. In this embodiment, the electric signal of the turning on the vehicle at the material excavation site is defined as zero, the electric signal of the turning on the vehicle at the material unloading site is defined as zero, the material in the bucket is transferred from the material excavation site to the material unloading site, and the corresponding electric signal of the turning on the vehicle inevitably changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero. The electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, so that the condition that the excavator completes the material transfer action is judged.
Collecting electric signals of a bucket, a bucket rod and a movable arm of an electric control handle, judging that the excavator finishes material unloading when the electric signals sequentially change from positive values or negative values to zero, and performing effective judgment on the bucket number of the excavator in the next step.
Collecting a pressure value of a bucket oil cylinder, and judging that the bucket number of the excavator is effective when the pressure value is greater than or equal to a preset pressure value; a pressure sensor 120 may be disposed on the bucket cylinder, and the pressure sensor 120 may detect an actual pressure value in the bucket cylinder, because the pressure of the bucket cylinder is determined by the load, the preset pressure value may be a pressure corresponding to the standard load, and when the actually detected pressure value is greater than or equal to the preset pressure value, it is determined that the bucket number of the excavator is valid; on the contrary, if the collected pressure value is smaller than the preset pressure value, the number of the buckets of the excavator is judged to be invalid, and statistics is not carried out.
It should be noted that the pressure sensor 120 may be disposed inside the bucket cylinder, or may be disposed on a hydraulic oil path communicated with the bucket cylinder, that is, the acquired pressure value may represent an internal pressure of the bucket cylinder.
When the excavator completes material digging action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator is automatically increased by 1.
The excavator finishes material excavating action, material transferring action and discharging action in sequence, the excavator is considered to finish an operation cycle, then whether the bucket number of the excavator is effective or not is judged by collecting the pressure value of a bucket oil cylinder, and when the bucket number is determined to be effective, the bucket number statistic of the excavator is automatically increased by 1.
In the step of determining that the excavator completes the material excavating action, the excavator may be determined to complete the material excavating action when the electrical signals of the boom, the arm and the bucket of the collecting electric control handle sequentially change from zero to a positive value, and then the excavator is determined to complete the discharging action when the electrical signals of the bucket, the arm and the boom of the collecting electric control handle sequentially change from a positive value to zero. Of course, in the step of determining that the excavator completes the material excavating action, the step of determining that the excavator completes the material excavating action may be performed when the electrical signals of the boom, the arm, and the bucket of the electric control handle are sequentially changed from zero to a negative value, and then when the step of determining the discharging action is performed, the step of determining that the excavator completes the discharging action may be performed when the electrical signals of the bucket, the arm, and the boom of the electric control handle are sequentially changed from the negative value to zero.
During actual use, whether the excavator completes material excavating action, material transferring action and unloading action is judged through collecting electric signals of rotation of a movable arm, an arm, a bucket and a loading machine of the electric control handle and collecting a pressure value of a bucket oil cylinder, and through reciprocating changes of the electric signals of rotation of the movable arm, the bucket and the loading machine of the electric control handle. Whether the bucket number of the excavator is effective or not is judged by comparing the pressure value of the bucket oil cylinder with the preset pressure value, and the accuracy of counting the bucket number is improved.
The method comprises the steps of collecting electric signals of a movable arm, a bucket rod, a bucket and loading rotation of an electric control handle and pressure values of a bucket oil cylinder, judging material excavating actions, material transferring actions and unloading actions of the excavator by utilizing changes of the electric signals of the movable arm, the bucket rod, the bucket and the loading rotation, judging whether the bucket number of the excavator is effective when the collected pressure values of the bucket oil cylinder are larger than or equal to a preset value, and accordingly automatically counting the bucket number of the excavator.
Further, the step of determining the material transfer action further includes: and collecting the turning angle of the upper vehicle, and judging that the excavator completes the material transfer action when the turning angle is larger than or equal to a preset angle.
Specifically, the judging steps of the material transferring action comprise two steps, namely, the step one is to collect the electric signal of the turning of the electric control handle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the judgment of the step two is carried out; and step two, acquiring the turning angle of the upper vehicle by using the turning angle sensor 130, and judging that the excavator completes the material transfer action when the turning angle is larger than or equal to a preset angle. Firstly, through collecting the electric signal of the turning of the upper vehicle, when the electric signal changes from zero to a positive value or a negative value, the electric signal changes from the positive value or the negative value to zero, and then further judgment is carried out, namely, the turning angle of the upper vehicle is collected, and when the turning angle is more than or equal to a preset angle, the excavator is judged to finish the material transfer action.
It should be noted that, the first step and the second step may not be in sequence, or the judgment of the second step may be performed first, and then the judgment of the first step may be performed. When only one step is completed, the material transfer action of the excavator is judged not to be completed, the bucket number of the excavator is not counted, and whether the material transfer action of the excavator is completed or not is judged through two steps, so that the accuracy of judging whether the material transfer action of the excavator is completed is further improved.
Further, the electrical signal is a voltage signal or a current signal.
The utility model provides an excavator, including the automatic number fill system of excavator. Because the excavator comprises the automatic bucket counting system of the excavator, the excavator has the advantages of the automatic bucket counting system of the excavator, the bucket counting can be automatically and effectively carried out, and the oil consumption efficiency test of the excavator is accurately realized.
To sum up, the automatic bucket counting system of the excavator provided by the utility model comprises a data acquisition module 100, a data processing module 200 and a counting module 300; the data acquisition module 100 comprises an electrical signal acquisition module 110 and a pressure sensor 120; the electric signal acquisition module 110 and the pressure sensor 120 are respectively connected with the data processing module 200, and the data processing module 200 is connected with the counting module 300; the electric signal acquisition module 110 is used for acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle, and when the electric signals sequentially change from zero to a positive value or a negative value, the excavator is judged to finish the material excavating action; the electric signal acquisition module 110 is used for acquiring an electric signal of the upper turning of the electric control handle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the excavator is judged to complete the material transfer action; the electric signal acquisition module 110 is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle, and when the electric signals sequentially change from a positive value or a negative value to zero, the excavator is judged to finish the material unloading action; the pressure sensor 120 is used for acquiring a pressure value of the bucket cylinder, and when the pressure value is greater than or equal to a preset pressure value, the number of buckets of the excavator is judged to be valid; after the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator of the counting module 300 is automatically increased by 1. The electric signal acquisition module 110 is used for acquiring the change of electric signals of a movable arm, a bucket rod, a bucket and the turning on the vehicle to judge the material excavating action, the material transferring action and the unloading action of the excavator, when the pressure value of a bucket oil cylinder acquired by the pressure sensor 120 is greater than or equal to a preset value, the number of buckets of the excavator is judged to be effective, so that the automatic counting of the number of buckets of the excavator is realized, the system is simple in structure and relatively low in cost, the invalid number of buckets can be eliminated by comparing the acquired pressure value with the preset pressure value, and the accuracy and reliability of statistical data are further ensured.
The utility model provides an excavator, including this excavator automatic number fill system, because of the excavator includes foretell excavator automatic number fill system, the event possesses the automatic advantage of counting the fill system of excavator on this excavator.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. The automatic bucket counting system of the excavator is characterized by comprising a data acquisition module (100), a data processing module (200) and a counting module (300);
the data acquisition module (100) comprises an electrical signal acquisition module (110) and a pressure sensor (120); the electric signal acquisition module (110) and the pressure sensor (120) are respectively connected with the data processing module (200), and the data processing module (200) is connected with the counting module (300);
the electric signal acquisition module (110) is used for acquiring electric signals of a movable arm, a bucket rod and a bucket of the electric control handle, and when the electric signals sequentially change from zero to a positive value or a negative value, the excavator is judged to finish material excavating action;
the electric signal acquisition module (110) is used for acquiring an electric signal of the getting-on rotation of the electric control handle, and when the electric signal changes from zero to a positive value or a negative value and then changes from the positive value or the negative value to zero, the excavator is judged to finish the material transfer action;
the electric signal acquisition module (110) is used for acquiring electric signals of a bucket, a bucket rod and a movable arm of the electric control handle, and when the electric signals sequentially change from a positive value or a negative value to zero, the excavator is judged to finish the material unloading action;
the pressure sensor (120) is used for collecting a pressure value of the bucket oil cylinder, and when the pressure value is larger than or equal to a preset pressure value, the number of buckets of the excavator is judged to be effective;
after the excavator completes material excavating action, material transferring action and unloading action in sequence and judges that the bucket number of the excavator is effective, the bucket number statistic number of the excavator of the counting module (300) is automatically increased by 1.
2. The excavator automatic bucket counting system of claim 1, wherein the data acquisition module (100) comprises a rotation angle sensor (130); the rotation angle sensor (130) is connected with the data processing module (200);
the corner sensor (130) is used for collecting the turning angle of getting on the excavator, and when the turning angle is larger than or equal to a preset angle, the excavator is judged to finish the material transferring action.
3. The excavator automatic bucket counting system of claim 1 wherein the electrical signal is a voltage signal or a current signal.
4. The excavator automatic bucket counting system of claim 1, wherein the excavator automatic bucket counting system comprises a display (400);
the display (400) is connected with the counting module (300) and is used for displaying the bucket number of the excavator.
5. The automatic bucket counting system of an excavator according to claim 1, wherein the pressure sensor (120) is arranged inside the bucket cylinder, and the pressure sensor (120) is connected with the data processing module (200) in a wireless communication mode.
6. The automatic bucket counting system of an excavator according to claim 1, wherein the automatic bucket counting system of the excavator comprises an input module (500), and the input module (500) is connected with the data processing module (200) and used for setting the preset pressure value.
7. An excavator comprising the excavator automatic bucket counting system of any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113216312A (en) * | 2021-05-28 | 2021-08-06 | 三一重机有限公司 | Excavator and excavator operation condition identification method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113216312A (en) * | 2021-05-28 | 2021-08-06 | 三一重机有限公司 | Excavator and excavator operation condition identification method |
| CN113216312B (en) * | 2021-05-28 | 2023-02-14 | 三一重机有限公司 | Excavator and excavator operation condition identification method |
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