CN-121994434-A - Suspension cushion rigidity attenuation detection system, method and related device

CN121994434ACN 121994434 ACN121994434 ACN 121994434ACN-121994434-A

Abstract

The invention discloses a system, a method and a related device for detecting the rigidity attenuation of a suspension cushion, which relate to the field of rigidity detection, wherein the system comprises a suspension cushion limiting structure, a collision detection circuit, a microprocessor and an engine controller, the suspension cushion limiting structure and the suspension cushion are symmetrically and coaxially arranged up and down and are positioned at the outer edges of the upper side and the lower side of the suspension cushion, the collision detection circuit is respectively connected with the suspension cushion limiting structure and the main frame, the suspension cushion limiting structure triggers the collision detection circuit to collect collision signals when contacting the main frame, the microprocessor outputs the collision signals to the engine controller, and the engine controller judges that the suspension cushion has rigidity attenuation and alarms when the current running working condition of the vehicle is consistent with the calibrated running working condition of the vehicle and the collision signals exceed the preset limit value. The invention realizes the real-time detection of the health state of the suspended soft cushion, can find the stiffness attenuation condition of the suspended soft cushion in time, improves the detection accuracy and has stronger real-time performance.

Inventors

ZHANG CHAOYANG
FAN NINGXIA
LIANG YANHUI
LI YANG

Assignees

潍柴动力股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260317

Claims (10)

1. A suspended cushion stiffness decay detection system, comprising: The suspension cushion limiting structure (11) is symmetrically and coaxially arranged with the suspension cushion (21), and the suspension cushion limiting structure (11) is positioned at the outer edges of the upper side and the lower side of the suspension cushion (21); The collision detection circuit (12), a first input end of the collision detection circuit (12) is connected with the suspension cushion limiting structure (11), a second input end of the collision detection circuit is connected with the main frame (22), and a collision distance is reserved between the suspension cushion limiting structure (11) and the main frame (22); The input end of the microprocessor (13) is connected with the output end of the collision detection circuit (12) and is used for acquiring a collision signal acquired by the collision detection circuit (12) when the suspension cushion limiting structure (11) is contacted with the main frame (22) in a preset time period; The engine controller (14), the engine controller (14) is connected with the output end of the microprocessor (13), and is used for obtaining the collision signal collected by the collision detection circuit (12) when the current running condition of the vehicle is consistent with the calibrated running condition of the vehicle, judging that the rigidity of the suspension cushion (21) is attenuated if the collision signal exceeds a preset limit value, and outputting alarm prompt information, wherein the calibrated running condition of the vehicle is the corresponding running condition of the vehicle when the suspension cushion (21) reaches the maximum displacement calibration value.
2. The suspended cushion stiffness attenuation detection system of claim 1, wherein the collision detection circuit (12) includes a first branch circuit and a second branch circuit; The first input end of the first branch circuit is connected with the suspension cushion limiting structure (11) positioned at the outer edge of the upper side of the suspension cushion (21), and the second input end of the first branch circuit is connected with the main frame (22); the first input end of the second branch circuit is connected with the suspension cushion limiting structure (11) positioned at the outer edge of the lower side of the suspension cushion (21), and the second input end of the second branch circuit is connected with the main frame (22); The input end of the microprocessor (13) is respectively connected with the output end of the first branch circuit and the output end of the second branch circuit, and is used for acquiring a first collision signal and/or a second collision signal acquired by the first branch circuit when the suspension cushion limiting structure (11) is contacted with the main frame (22) in a preset time period, wherein the collision signal acquired by the collision detection circuit (12) comprises the first collision signal and/or the second collision signal.
3. The suspended cushion stiffness decay detection system of claim 2, further comprising a first crash return spring and a second crash return spring; The first collision return spring is coaxially arranged with a suspension cushion limiting structure (11) positioned at the outer edge of the upper side of the suspension cushion (21) and is mechanically connected with the suspension cushion limiting structure, and meanwhile, the first collision return spring is connected with the first input end of the first branch circuit; the first collision return spring is used for absorbing impact energy through elastic deformation when the suspension cushion limiting structure (11) is in contact with the main frame (22), providing buffer protection for the suspension cushion (21) and triggering the first branch circuit to collect the first collision signal; the second collision return spring is coaxially arranged with a suspension cushion limiting structure (11) positioned at the outer edge of the lower side of the suspension cushion (21) and is mechanically connected with the suspension cushion limiting structure, and meanwhile, the second collision return spring is connected with the first input end of the second branch circuit; the second collision return spring is used for absorbing impact energy through elastic deformation when the suspension cushion limiting structure (11) is in contact with the main frame (22), providing buffer protection for the suspension cushion (21), and triggering the second branch circuit to collect the second collision signal.
4. A suspended cushion stiffness decay detection system according to any of claims 1-3, wherein the engine controller (14) is further configured to: Acquiring the actual running load of the current vehicle and the accumulated service time of the current suspension cushion; Determining a target maximum stiffness attenuation value corresponding to the current vehicle actual running load and the current suspension cushion accumulated use time from the corresponding relation among the pre-calibrated vehicle actual running load, the suspension cushion accumulated use time and the maximum stiffness attenuation value allowed by the suspension cushion; Determining an allowable maximum displacement limit value of a suspension cushion according to the target maximum stiffness attenuation value and the bearing capacity under the condition that the bearing capacity of a power assembly suspension system is unchanged; and determining the maximum displacement limit value of the suspension cushion as a reserved collision distance between the suspension cushion limiting structure (11) and the main frame (22).
5. A method for detecting the stiffness attenuation of a suspended cushion, characterized by being applied to an engine controller (14) in the stiffness attenuation detection system according to any one of claims 1 to 4, the method comprising: acquiring the current running condition of the vehicle; when the current running condition of the vehicle is consistent with the calibrated running condition of the vehicle, acquiring a collision signal acquired by a collision detection circuit (12) in a preset time period when a suspension cushion limiting structure (11) is contacted with a main frame (22), wherein the calibrated running condition of the vehicle is the running condition of the vehicle corresponding to the time when a suspension cushion (21) reaches a maximum displacement calibration value; And if the collision signal exceeds a preset limit value, judging that the suspension cushion (21) is subjected to rigidity attenuation, and outputting alarm prompt information.
6. The suspended cushion stiffness attenuation detection method according to claim 5, wherein if the collision signal exceeds a preset limit value, determining that stiffness attenuation of the suspended cushion (21) occurs, and outputting an alarm prompt message, comprising: When the number of collisions within the preset time period exceeds a preset collision number limit value, judging that the suspension cushion (21) is subjected to rigidity attenuation, and outputting alarm prompt information; wherein the collision signal includes the number of collisions, and the preset limit includes the preset number of collisions limit.
7. The method for detecting the stiffness attenuation of the suspension cushion according to claim 5 or 6, wherein if the collision signal exceeds a preset limit value, determining that the stiffness attenuation of the suspension cushion (21) occurs, and outputting an alarm prompt message, comprises: When the accumulated collision contact time in the preset time period exceeds a preset collision contact time limit value, judging that the suspension cushion (21) is subjected to rigidity attenuation, and outputting alarm prompt information; Wherein the collision signal comprises a collision contact time and the preset limit comprises the preset collision contact time limit.
8. A suspended cushion stiffness attenuation detection device, characterized by an engine controller (14) applied to the suspended cushion stiffness attenuation detection system according to any one of claims 1 to 4, comprising: the driving condition acquisition unit is used for acquiring the current driving condition of the vehicle; The collision signal acquisition unit is used for acquiring a collision signal acquired by the collision detection circuit (12) when the suspension cushion limiting structure (11) is contacted with the main frame (22) in a preset time period when the current running condition of the vehicle is consistent with the vehicle calibration running condition, wherein the vehicle calibration running condition is a vehicle running condition corresponding to the time when the suspension cushion (21) reaches the maximum displacement calibration value; and the rigidity attenuation judging unit is used for judging that the rigidity of the suspension cushion (21) is attenuated if the collision signal exceeds a preset limit value and outputting alarm prompt information.
9. A computer storage medium storing at least one instruction that when executed by a processor implements the suspended cushion stiffness decay detection method of any one of claims 5-7.
10. An engine controller is characterized by comprising a memory and a processor; The memory is used for storing at least one instruction; The processor is configured to execute the at least one instruction to implement the suspended cushion stiffness decay detection method of any one of claims 5-7.

Description

Suspension cushion rigidity attenuation detection system, method and related device Technical Field The invention relates to the technical field of rigidity detection, in particular to a suspension cushion rigidity attenuation detection system, a suspension cushion rigidity attenuation detection method and a suspension cushion rigidity attenuation detection related device. Background In the power assembly suspension system of the rigid mine truck, a suspension cushion is used as a key elastic element for connecting the power assembly and the frame, and the key function of the suspension cushion is to optimize NVH (Noise Vibration Harshness, noise, vibration and harshness) performance of the whole vehicle and ensure the reliability of the system through vibration reduction, limiting, protection and balance functions. With the increase of the service time, the suspension cushion can generate the phenomenon of rigidity attenuation due to fatigue aging, so that the NVH performance of the whole vehicle is reduced, and meanwhile, the driving comfort is reduced. The traditional detection method mainly relies on manual periodic inspection, but has two defects that firstly, subjective judgment is relied on, quantitative index support is lacked, so that detection accuracy is low, secondly, the detection period is fixed, the stiffness attenuation process cannot be captured in real time, and instantaneity is poor. Disclosure of Invention In view of the above, the invention discloses a system, a method and a related device for detecting the stiffness attenuation of a suspended soft cushion, so as to realize automatic detection of the health state of the suspended soft cushion, improve the detection accuracy and have stronger instantaneity. A suspended cushion stiffness decay detection system comprising: The suspension cushion limiting structure 11 is arranged symmetrically and coaxially with the suspension cushion 21, and the suspension cushion limiting structure 11 is positioned at the outer edges of the upper side and the lower side of the suspension cushion 21; The first input end of the collision detection circuit 12 is connected with the suspended cushion limiting structure 11, the second input end of the collision detection circuit 12 is connected with the main frame 22, and a collision distance is reserved between the suspended cushion limiting structure 11 and the main frame 22; The input end of the microprocessor 13 is connected with the output end of the collision detection circuit 12, and is used for acquiring a collision signal acquired by the collision detection circuit 12 when the suspension cushion limiting structure 11 is contacted with the main frame 22 in a preset time period; And the engine controller 14 is connected with the output end of the microprocessor 13, and is used for acquiring the collision signal acquired by the collision detection circuit 12 when the current running condition of the vehicle is consistent with the vehicle calibration running condition, judging that the suspension cushion 21 is subjected to rigidity attenuation if the collision signal exceeds a preset limit value, and outputting alarm prompt information, wherein the vehicle calibration running condition is the vehicle running condition corresponding to the time when the suspension cushion 21 reaches the maximum displacement calibration value. Optionally, the collision detection circuit 12 includes a first branch circuit and a second branch circuit; a first input end of the first branch circuit is connected with the suspension cushion limiting structure 11 positioned at the outer edge of the upper side of the suspension cushion 21, and a second input end of the first branch circuit is connected with the main frame 22; The first input end of the second branch circuit is connected with the suspension cushion limiting structure 11 positioned at the outer edge of the lower side of the suspension cushion 21, and the second input end is connected with the main frame 22; The input end of the microprocessor 13 is respectively connected with the output end of the first branch circuit and the output end of the second branch circuit, and is used for acquiring a first collision signal and/or a second collision signal acquired by the first branch circuit when the suspension cushion limiting structure 11 contacts the main frame 22 in a preset time period, wherein the collision signal acquired by the collision detection circuit 12 comprises the first collision signal and/or the second collision signal. Optionally, the device further comprises a first collision return spring and a second collision return spring; the first collision return spring is coaxially arranged with the suspension cushion limiting structure 11 positioned at the outer edge of the upper side of the suspension cushion 21 and is mechanically connected with the suspension cushion limiting structure, and meanwhile, the first collision return spring is connected with the fir