Excavator performance detection system

Abstract

The invention relates to a performance detection system, in particular to an excavator performance detection system which comprises a crawler belt and further comprises a crawler belt transmission module. A resistance simulation module; a driving simulation module; a load-bearing simulation module; a detection module; the control module is connected with the track transmission module, the driving simulation module, the load-bearing simulation module and the detection module and is used for determining the loss degree of pressure according to the pressure difference quantity of the load-bearing simulation module and adjusting the telescopic length of the constraint assembly when the loss degree exceeds a preset range; and determining an unqualified track and a pitch reference value of the unqualified track according to the maximum elongation of the track. According to the invention, the accuracy of the detection result is improved.

Description

Technical Field

[0001] The invention relates to a performance detection system, in particular to an excavator performance detection system. Background Art

[0002] In the prior art, the excavator performance detection system uses various sensors to monitor the operating parameters of the excavator, such as pressure sensors, temperature sensors, speed sensors, etc., to collect equipment status data in real time, and uses a microprocessor or computer to analyze and process it to evaluate the performance of the excavator. It uses a high-definition camera to monitor the tracks in real time, uses sound sensors to collect the sounds generated during operation, and monitors vibration conditions, thereby analyzing the degree of wear, cracks, deformation, and other conditions of the tracks.

[0003] Chinese Patent Publication No.: CN204439380U discloses a crawler performance test bench, including a tension and compression sensor, a hydraulic jack, a loading frame, a base, an eddy current dynamometer, a motor, a first torque and speed sensor, a second torque and speed sensor, a reducer, a test bench frame, a crawler, a first coupling, a second coupling, a third coupling, a tensioning device, a slider, a guide wheel, a supporting wheel, a pulley, a pulley seat, a roller, a roller seat, a belt; a crawler frame, a driving wheel and a towing plate; the bottom of the test bench frame is fixedly connected to the ground by bolts, and the hydraulic jack is connected to the inside by bolts. The hydraulic jack is provided with a tension and compression sensor, and the hydraulic jack is connected to the loading frame. Two protruding ends are welded on both sides of the crawler frame, and the protruding ends are connected to the loading frame by bolts. The protruding ends cooperate with the longitudinal grooves opened on the inner wall of the test bench frame, and the towing plate is welded on the top of the crawler frame. The track frame is equipped with a supporting wheel inside, and the driving wheel and the driving wheel shaft are assembled at a fixed position at one end of the track frame. The end cover of the driving wheel shaft is fixed to one side of the track frame by bolts, and the protruding end of the driving wheel shaft on the other side is connected to the reducer through the second coupling and the second torque and speed sensor, and the reducer is connected to the motor through the third coupling and the first torque and speed sensor; the slider is assembled in the groove at one end of the track frame and can slide in the groove, the tensioning device is fixedly assembled in the groove of the track frame and contacts with the slider, the guide wheel is assembled on the guide wheel shaft, and the guide wheel shaft is sleeved in the slider; the track is sleeved on the driving wheel, the towing plate, the guide wheel and the supporting wheel, and the track is placed on the belt; the roller is placed inside the belt drive and contacts with the belt, and the roller is fixed to the base through the roller seat and bolts; the pulley is fixed to the base through the pulley seat and bolts, and the protruding end of the pulley shaft is connected to the eddy current dynamometer through the first coupling. It can be seen that the track performance test bench has the problem that the accuracy of the test results is reduced due to the fatigue of the link structure in the load-bearing simulation test, and the production accuracy of the excavator track is reduced due to the production error of the excavator track, which leads to the production of unqualified tracks. Summary of the invention

[0004] To this end, the present invention provides an excavator performance detection system to overcome the problems in the prior art of reduced accuracy of detection results due to fatigue of the link structure in the load-bearing simulation test, and reduced excavator production accuracy due to unqualified tracks caused by errors in excavator track production.

[0005] To achieve the above object, the present invention provides an excavator performance detection system, including a crawler, and further comprising:

[0006] A crawler transmission module, which is connected to the crawler and used to transmit pressure and driving force to the crawler, including a crawler frame for supporting the crawler and a driving wheel connected to the crawler frame for rotating the crawler;

[0007] A resistance simulation module, which is arranged below the crawler drive module and is used to simulate the resistance encountered by the crawler drive module in actual operation;

[0008] A driving simulation module, which is connected to the crawler drive module and is used to simulate the driving force of the crawler drive module in actual operation;

[0009] A load-bearing simulation module, which is connected to the crawler drive module and is used to adjust the load-bearing pressure of the crawler drive module, including a constraint component connected to the crawler frame and used to adjust the load-bearing moment of the crawler drive module;

[0010] A detection module, which is connected to the crawler transmission module and the load-bearing simulation module respectively, and is used to detect the actual load-bearing pressure of the crawler and the distance between the marking points of the crawler;

[0011] A control module is respectively connected to the track transmission module, the drive simulation module, the load-bearing simulation module and the detection module, and is used to determine the degree of pressure loss according to the pressure difference of the load-bearing simulation module, and to adjust the telescopic length of the constraint assembly when the loss degree exceeds a predetermined range, and to determine the unqualified track and the pitch reference value of the unqualified track according to the maximum elongation of the track.

[0012] Furthermore, the driving simulation module includes:

[0013] A speed reducer connected to the driving wheel to increase the torque output of the driving force;

[0014] A hydraulic motor is connected to the reducer to provide the driving force.

[0015] Furthermore, the restraint assembly comprises a first restraint rod and a second restraint rod symmetrically arranged on both sides of the track frame not covering the track.

[0016] Furthermore, the load-bearing simulation module also includes a pressurizer connected to the constraint assembly for applying pressure to the crawler track and the crawler track transmission module.

[0017] Furthermore, the detection module includes:

[0018] A pressure sensor is arranged below the crawler belt to detect the actual load-bearing pressure of the crawler belt;

[0019] A visual sensor is arranged at one end of the crawler away from the reducer, and is used to identify the position of the first marking point and the position of the second marking point.

[0020] Further, the first marking point position and the second marking point position are respectively arranged at an edge point of the upper surface of the track in the driving direction and at a side of the upper surface of the track away from the first marking point position.

[0021] Furthermore, the control module is connected to the pressure sensor and the constraint assembly respectively to obtain the actual bearing pressure of the track, and calculate the pressure difference according to the actual bearing pressure of the track and the pressure applied by the pressurizer.

[0022] If the pressure difference is greater than a preset difference, the control module determines that the pressure loss exceeds a predetermined range and shortens the extension length of the restraint assembly.

[0023] The telescopic length of the constraint assembly is the sum of the lengths of the first constraint rod and the second constraint rod when they are simultaneously telescoped.

[0024] Furthermore, the shortening amplitude of the telescopic length of the constraint assembly is determined according to the difference between the pressure difference and the preset difference.

[0025] Furthermore, the control module is connected to the visual sensor, the pressurizer and the drive simulation module respectively, so as to calculate the maximum static friction when the pressure applied by the pressurizer reaches the preset maximum load-bearing pressure of the track, increase the driving force of the drive simulation module to the maximum static friction, obtain the change distance between the first mark point position and the second mark point position to calculate the maximum elongation of the track,

[0026] If the maximum extension of the track is less than the preset maximum extension, it is determined that the tension of the track does not meet the requirements, and the track whose tension does not meet the requirements is determined to be the unqualified track.

[0027] Furthermore, the control module is connected to the visual sensor and the pressurizer to obtain the maximum extension of the crawler and the preset maximum extension, calculate the ratio deviation according to the length of the crawler, and calculate the pitch reference value of the unqualified crawler according to the ratio deviation;

[0028] Wherein, the calculation formula of the ratio deviation is:

[0029]

[0030] Wherein, s is the ratio deviation, L1 is the maximum extension of the crawler, L is the length of the crawler, and L2 is the preset maximum extension;

[0031] The calculation formula of the track pitch reference value is:

[0032]

[0033] Wherein, d is the pitch reference value of the crawler, s is the ratio deviation, λ is the size coefficient, G m is the weight of the excavator.

[0034] Compared with the prior art, the beneficial effects of the present invention lie in that the system of the present invention simulates the load-bearing of the walking module, the actual operating environment and the operating driving force when the excavator is running by setting a track transmission module, a resistance simulation module, a drive simulation module, a load-bearing simulation module, a detection module and a control module. By setting an adjustable constraint component, since the constraint rod is in a fatigue state during the load-bearing simulation test, part of the applied load-bearing pressure is decomposed by the constraint rod, resulting in inaccurate load-bearing simulation test results. By adjusting the telescopic length of the constraint component and reducing the torque of the constraint rod, the accuracy of the test result is increased. By detecting the maximum elongation of the track, the tensioning force of the track is determined, and the track that does not meet the tensioning force requirements is screened out, thereby improving the production accuracy of the excavator. The pitch reference value of the unqualified track is output for the unqualified track, thereby improving the production efficiency and further improving the production accuracy of the excavator track.

[0035] Furthermore, the system of the present invention reduces the problem of differences in detection results caused by differences between experimental environments and actual environments by providing a reducer and a hydraulic motor and simulating the driving force of the excavator, thereby improving the accuracy of the monitoring results.

[0036] Furthermore, the system of the present invention sets a first marking point and a second marking point. Since the elongation of the track at different positions is different when detecting the tension of the track, the detection position with the most reference value is determined by selecting the marking point, thereby improving the accuracy of the detection result.

[0037] Furthermore, the system of the present invention sets a preset difference amount. Since the constraint rod is subjected to continuous pressure during the load-bearing simulation test, the constraint rod becomes fatigued and the pressure transmitted to the track is decomposed, which reduces the accuracy of the test result. By reducing the telescopic length of the constraint assembly and reducing the torque at the constraint rod, the stability of the test process is increased, and the accuracy of the test result is further increased.

[0038] Furthermore, the system of the present invention sets a preset maximum bearing pressure, and determines whether the tensioning force meets the requirements by simulating the excavator under maximum resistance according to the preset maximum bearing pressure of the track. Since the error amount in the production process causes the track to be unable to adapt to its maximum bearing pressure, unqualified products are screened out, thereby improving the performance of the track in meeting the design standards in actual work, reducing failures caused by insufficient track tension, and further improving the production accuracy of the excavator track. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an overall structural diagram of an excavator performance detection system according to an embodiment of the present invention;

[0040] Figure 2 Another angle structural diagram of the excavator performance detection system according to an embodiment of the present invention;

[0041] Figure 3 This is an overall structural block diagram of an excavator performance detection system according to an embodiment of the present invention;

[0042] Figure 4 This is a structural block diagram of a detection module of an excavator performance detection system according to an embodiment of the present invention.

[0043] Explanation of the reference numerals in the accompanying drawings: 1-pressurizer, 2-track, 3-second restraint rod, 4-reducer, 5-hydraulic motor, 6-pressure sensor, 7-simulated runway belt, 8-visual sensor, 9-first restraint rod, 10-first marking point, 11-second marking point, 12-track supporting roller, 13-track frame, 14-supporting wheel, 15-driving wheel. DETAILED DESCRIPTION

[0044] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0046] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0047] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Please refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively an overall structural diagram of the excavator performance detection system according to an embodiment of the present invention, a structural diagram from another angle, an overall structural block diagram, and a structural block diagram of a detection module. An embodiment of the present invention provides an excavator performance detection system, including a crawler 2, and also including:

[0048] A crawler transmission module, which is connected to the crawler 2 and is used to transmit pressure and driving force to the crawler 2, including a crawler frame 13 for supporting the crawler 2 and a driving wheel 15 connected to the crawler frame 13 and used to rotate the crawler 2;

[0049] A resistance simulation module, which is arranged below the crawler drive module and is used to simulate the resistance encountered by the crawler drive module in actual operation;

[0050] A driving simulation module, which is connected to the crawler drive module and is used to simulate the driving force of the crawler drive module in actual operation;

[0051] A load-bearing simulation module, which is connected to the crawler drive module and is used to adjust the load-bearing pressure of the crawler drive module, including a constraint component connected to the crawler frame 13 and used to adjust the load-bearing moment of the crawler drive module;

[0052] A detection module, which is connected to the crawler transmission module and the load-bearing simulation module respectively, and is used to detect the actual load-bearing pressure of the crawler 2 and the distance between the marking points of the crawler 2;

[0053] A control module, which is respectively connected to the track transmission module, the drive simulation module, the load-bearing simulation module and the detection module, and is used to determine the degree of pressure loss according to the pressure difference of the load-bearing simulation module, and adjust the telescopic length of the constraint assembly when the loss degree exceeds a predetermined range, and determine the unqualified track 2 and the pitch reference value of the unqualified track 2 according to the maximum elongation of the track 2.

[0054] Specifically, the crawler track 2 is composed of a plurality of track shoes (not shown in the figure).

[0055] Specifically, the crawler drive module also includes:

[0056] The supporting wheel 14 is connected to the crawler frame 13 to support the weight of the crawler frame 13;

[0057] The track roller 12 is connected to the track frame 13 and is used to support the track 2 upward to keep the track 2 tight;

[0058] The guide wheel is connected to the track frame 13 and is used to provide a driving direction for the track 2 .

[0059] Specifically, the resistance simulation module includes:

[0060] A simulated runway belt 7 is used to provide resistance for the crawler belt 2;

[0061] A driver (not shown) is connected to the simulated runway belt 7 and is used to drive the simulated runway belt 7 to rotate in a direction opposite to the crawler driving direction.

[0062] Specifically, the contact surface between the resistance simulation module and the track 2 simulates the friction coefficient of a sandy road, and the friction coefficient is set to 0.5.

[0063] In implementation, the system of the present invention simulates the load-bearing of the walking module, the actual operating environment, and the operating driving force when the excavator is running by setting a crawler transmission module, a resistance simulation module, a drive simulation module, a load-bearing simulation module, a detection module, and a control module. By setting an adjustable constraint component, since the constraint rod is in a fatigue state during the load-bearing simulation test, part of the applied load-bearing pressure is decomposed by the constraint rod, resulting in inaccurate load-bearing simulation test results. By adjusting the telescopic length of the constraint component and reducing the torque of the constraint rod, the accuracy of the test result is increased; the tensioning force of the crawler 2 is determined by detecting the maximum elongation of the crawler 2, and the crawler 2 that does not meet the tensioning force requirements is screened out, thereby improving the production accuracy of the excavator, and outputting the pitch reference value of the unqualified crawler 2, thereby improving the production efficiency and further improving the production accuracy of the excavator crawler 2.

[0064] Specifically, the driving simulation module includes:

[0065] A reducer 4, connected to the driving wheel 15, for increasing the torque output of the driving force;

[0066] The hydraulic motor 5 is connected to the reducer 4 to provide the driving force.

[0067] In practice, the system of the present invention reduces the problem of differences in detection results caused by differences in experimental environment and actual environment by setting up a reducer 4 and a hydraulic motor 5 and simulating the driving force of the excavator, thereby improving the accuracy of the monitoring results.

[0068] Specifically, the restraint assembly includes a first restraint rod 9 and a second restraint rod 3 symmetrically arranged on both sides of the track frame 13 not covering the track 2 .

[0069] In implementation, the first restraining rod 9 and the second restraining rod 3 may be electric telescopic rods.

[0070] Specifically, the load-bearing simulation module further includes a pressurizer 1 connected to the constraint assembly for applying pressure to the crawler track 2 and the crawler track transmission module.

[0071] Specifically, the detection module includes:

[0072] A pressure sensor 6, which is arranged below the crawler 2 and is used to detect the actual bearing pressure of the crawler 2;

[0073] The visual sensor 8 is arranged at one end of the track 2 away from the reducer 4 and is used to identify the position of the first marking point 10 and the position of the second marking point 11.

[0074] Specifically, the position of the first marking point 10 and the position of the second marking point 11 are respectively set at the edge point of the upper surface of the track 2 in the driving direction and at one side of the upper surface of the track 2 away from the position of the first marking point 10 .

[0075] In practice, the second marking point 11 can be set at the 5th to 8th track shoe section from the first marking point 10 . The system of the present invention preferably sets the second marking point 11 at the 6th track shoe section from the first marking point 10 .

[0076] In practice, the system of the present invention sets a first marking point 10 and a second marking point 11. Since the elongation of the track 2 at different positions is different when detecting the tension of the track 2, the most valuable detection position is determined by selecting the marking point, thereby improving the accuracy of the detection result.

[0077] Specifically, the control module is connected to the pressure sensor 6 and the constraint assembly respectively to obtain the actual bearing pressure of the track 2, and calculate the pressure difference according to the actual bearing pressure of the track 2 and the pressure applied by the pressurizer 1.

[0078] If the pressure difference is greater than a preset difference, the control module determines that the pressure loss exceeds a predetermined range and shortens the extension length of the restraint assembly.

[0079] The telescopic length of the constraint assembly is the sum of the lengths of the first constraint rod 9 and the second constraint rod 3 when they are simultaneously telescoped.

[0080] Specifically, the shortening range of the telescopic length of the constraint component is determined according to the difference between the pressure difference and the preset difference.

[0081] Specifically, the pressure difference is the difference between the actual bearing pressure of the crawler 2 and the pressure applied by the pressurizer 1 .

[0082] In implementation, the general value range of the preset difference amount is [0.5kpa, 0.8kpa].

[0083] Preferably, a preferred embodiment of the preset difference amount is 0.6 kpa.

[0084] Specifically, if the difference of the preset pressure difference is within 0.1kpa, the telescopic length of the constraint assembly is shortened by 2cm; if the difference of the preset pressure difference exceeds 0.1kpa, the telescopic length of the constraint assembly is shortened by 2.5cm for every 0.1kpa exceeding the preset pressure difference. For example, if the pressure difference is 0.8kpa and the current telescopic length of the constraint assembly is 16cm, the telescopic length of the constraint assembly is shortened to 16cm-2cm-2.5cm=11.5cm.

[0085] In practice, the system of the present invention sets a preset difference amount. Since the constraint rod is subjected to continuous pressure during the load-bearing simulation test, the constraint rod becomes fatigued and the pressure transmitted to the track 2 is decomposed, which reduces the accuracy of the test result. By reducing the telescopic length of the constraint assembly and reducing the torque at the constraint rod, the stability of the test process is increased, and the accuracy of the test result is further increased.

[0086] Specifically, the control module is connected to the visual sensor 8, the pressurizer 1 and the drive simulation module respectively, so as to calculate the maximum static friction when the pressure applied by the pressurizer 1 reaches the preset maximum bearing pressure of the crawler 2, and increase the driving force of the drive simulation module to the maximum static friction, obtain the change distance between the position of the first marking point 10 and the position of the second marking point 11 to calculate the maximum elongation of the crawler 2,

[0087] If the maximum elongation of the crawler track 2 is less than the preset maximum elongation, it is determined that the tension of the crawler track 2 does not meet the requirements, and the crawler track 2 whose tension does not meet the requirements is determined as the unqualified crawler track 2.

[0088] Specifically, the maximum extension of the crawler track 2 is the difference between the distances between the first marking point 10 and the second marking point 11 when the driving force reaches the maximum static friction force and when no driving force is applied.

[0089] Specifically, the maximum static friction force is calculated according to the maximum bearing pressure and the friction coefficient of the simulated runway belt 7. The calculation formula of the maximum static friction force is a prior art, so it will not be described in detail here.

[0090] In practice, the general range of values ​​for the preset maximum elongation is [8mm, 12mm].

[0091] Preferably, the preset maximum elongation is 10 mm.

[0092] In implementation, the system of the present invention sets a preset maximum bearing pressure, and determines whether the tensioning force meets the requirements by simulating the excavator under maximum resistance according to the preset maximum bearing pressure of the track 2. Since the error amount in the production process causes the track 2 to be unable to adapt to its maximum bearing pressure, unqualified products are screened out, thereby improving the performance of the track 2 in meeting the design standards in actual work, reducing failures caused by insufficient tension of the track 2, and further improving the production accuracy of the excavator track 2.

[0093] Specifically, the control module is connected to the visual sensor 8 and the pressurizer 1 to obtain the maximum extension of the crawler 2 and the preset maximum extension, calculate the ratio deviation according to the length of the crawler 2, and calculate the pitch reference value of the unqualified crawler 2 according to the ratio deviation;

[0094] Wherein, the calculation formula of the ratio deviation is:

[0095]

[0096] Wherein, s is the ratio deviation, L1 is the maximum extension of the crawler 2, L is the length of the crawler 2, and L2 is the preset maximum extension;

[0097] The calculation formula of the pitch reference value of the crawler 2 is:

[0098]

[0099] Wherein, d is the pitch reference value of the crawler 2, s is the ratio deviation, λ is the size coefficient, Gm is the weight of the excavator.

[0100] Specifically, λ is usually between 10 and 13.

[0101] Specifically, the pitch of the crawler track 2 is the distance between the centers of adjacent wheel axles on the crawler track 2 .

[0102] Specifically, the wheel axle is connected to the crawler track 2 and the driving wheel 15 respectively, so as to transmit driving force to the crawler track 2 .

[0103] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An excavator performance detection system, comprising a crawler, characterized in that: Also includes: A crawler transmission module, which is connected to the crawler and used to transmit pressure and driving force to the crawler, including a crawler frame for supporting the crawler and a driving wheel connected to the crawler frame for rotating the crawler; A resistance simulation module, which is arranged below the crawler drive module and is used to simulate the resistance encountered by the crawler drive module in actual operation; A driving simulation module, which is connected to the crawler drive module and is used to simulate the driving force of the crawler drive module in actual operation; A load-bearing simulation module, which is connected to the crawler drive module and is used to adjust the load-bearing pressure of the crawler drive module, including a constraint component connected to the crawler frame and used to adjust the load-bearing moment of the crawler drive module; A detection module, which is connected to the crawler transmission module and the load-bearing simulation module respectively, and is used to detect the actual load-bearing pressure of the crawler and the distance between the marking points of the crawler; A control module is respectively connected to the track transmission module, the drive simulation module, the load-bearing simulation module and the detection module, and is used to determine the degree of pressure loss according to the pressure difference of the load-bearing simulation module, and to adjust the telescopic length of the constraint assembly when the loss degree exceeds a predetermined range, and to determine the unqualified track and the pitch reference value of the unqualified track according to the maximum elongation of the track.

2. The excavator performance detection system according to claim 1, characterized in that: The driving simulation module comprises: A speed reducer connected to the driving wheel to increase the torque output of the driving force; A hydraulic motor is connected to the reducer to provide the driving force.

3. The excavator performance detection system according to claim 2, characterized in that: The restraint assembly comprises a first restraint rod and a second restraint rod symmetrically arranged on two sides of the track frame not covering the track.

4. The excavator performance detection system according to claim 3, characterized in that: The load-bearing simulation module also includes a pressurizer connected to the constraint assembly for applying pressure to the crawler track and the crawler track transmission module.

5. The excavator performance detection system according to claim 4, characterized in that: The detection module comprises: A pressure sensor is arranged below the crawler belt to detect the actual load-bearing pressure of the crawler belt; A visual sensor is arranged at one end of the crawler away from the reducer, and is used to identify the position of the first marking point and the position of the second marking point.

6. The excavator performance detection system according to claim 5, characterized in that: The first marking point position and the second marking point position are respectively arranged at an edge point of the upper surface of the track in the driving direction and at a side of the upper surface of the track away from the first marking point position.

7. The excavator performance detection system according to claim 6, characterized in that: The control module is connected to the pressure sensor and the constraint assembly respectively to obtain the actual bearing pressure of the track, and calculate the pressure difference according to the actual bearing pressure of the track and the pressure applied by the pressurizer. If the pressure difference is greater than a preset difference, the control module determines that the pressure loss exceeds a predetermined range and shortens the extension length of the restraint assembly. The telescopic length of the constraint assembly is the sum of the lengths of the first constraint rod and the second constraint rod when they are simultaneously telescoped.

8. The excavator performance detection system according to claim 7, characterized in that: The shortening range of the telescopic length of the constraint component is determined according to the difference between the pressure difference and the preset difference.

9. The excavator performance detection system according to claim 8, characterized in that: The control module is connected to the visual sensor, the pressurizer and the drive simulation module respectively, and is used to calculate the maximum static friction when the pressure applied by the pressurizer reaches the preset maximum load-bearing pressure of the crawler, and increase the driving force of the drive simulation module to the maximum static friction, and obtain the change distance between the first mark point position and the second mark point position to calculate the maximum extension of the crawler, If the maximum extension of the track is less than the preset maximum extension, it is determined that the tension of the track does not meet the requirements, and the track whose tension does not meet the requirements is determined to be the unqualified track.

10. The excavator performance detection system according to claim 9, characterized in that: The control module is connected to the visual sensor and the pressurizer to obtain the maximum extension of the crawler and the preset maximum extension, calculate the ratio deviation according to the length of the crawler, and calculate the pitch reference value of the unqualified crawler according to the ratio deviation; Wherein, the calculation formula of the ratio deviation is: Wherein, s is the ratio deviation, L1 is the maximum extension of the crawler, L is the length of the crawler, and L2 is the preset maximum extension; The calculation formula of the track pitch reference value is: Wherein, d is the pitch reference value of the crawler, s is the ratio deviation, λ is the size coefficient, G m is the weight of the excavator.

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